SINGLE DEVICE FOR HANDLING CLIENT SIDE AND SERVER SIDE OPERATIONS FOR A/V BRIDGING AND A/V BRIDGING EXTENSIONS

Aspects of a single device for handling server side operations for A/V bridging and A/V bridging extensions may include a single IC device that is configured to enable encapsulation of generated digital video data within an encapsulating PDU. The single IC device may enable determination of a traffic class designation associated with the encapsulating PDU. The single IC device may enable transmission of the encapsulating PDU via a network based on the traffic class designation. Aspects of a single device for handling client side operations may include a single IC device that is configured to enable extraction of received digital video that is encapsulated within an encapsulating PDU. The encapsulating PDU may be received via a network at a destination device. The single IC device may enable transmission of the received digital video data to a multimedia monitor coupled to the destination device via an interface connector.

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Description
CROSS-REFERENCE TO RELATED APPLICATIONS/INCORPORATION BY REFERENCE

This application makes reference to, claims priority to, and claims the benefit of U.S. Provisional Application Ser. No. 60/917,870, filed on May 14, 2007, which is hereby incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

Certain embodiments of the invention relate to communication networks. More specifically, certain embodiments of the invention relate to a method and system comprising a single device for handling client side and server side operations for A/V bridging and A/V bridging extensions.

BACKGROUND OF THE INVENTION

The generation and rendering of high end graphics often involves the movement of large quantities of data. Frequently the data is stored in a server, from which it may be accessed by users at computer workstations (or, more generally, at computing devices) via a network. Once the data is received at the computing device, the graphics may be displayed on an attached video monitor. In many cases the video monitor is physically separate and has been conventionally attached to the computing device via an analog interface, such as a video graphics array (VGA) interface, or a digital interface such as a digital visual interface (DVI). In a typical configuration, an interface in the computing device is connected to a compatible interface in the video monitor via an interstitial connector, such as a cable.

In an alternative configuration, the computing device may incorporate a video monitor. An example of this configuration is a laptop computer in which the video monitor is a component in the physical computing device unit. Whether the video monitor is physically incorporated within the computing device or is a physically separate device, the video monitor may or may not have touch screen capability.

Display Port is a digital interface standard, which enables a computing device to send graphics and video data to a video monitor, or multimedia display device, via a Display Port interface. In this regard, the Display Port interface standard may describe a point-to-point interface, which is capable of transmitting data from a device connected at one end of a connecting cable to a device connected at the other end of the connecting cable. The graphics and/or video data communicated across the Display Port interface may be sent in mini-packets as described in applicable standards. The mini-packets may contain information comprising instructions on how to render the graphics and/or video data on the video display screen, for example. The mini-packets may be sent via a plurality of data paths referred to as “lanes”. In an exemplary Display Port interface, there may be four (4) such lanes.

In addition to supporting unidirectional data traffic from the computing device to the computer monitor (or other attached video display device), the Display Port standard may also enable the bidirectional transfer of data. For example, the Display Port standard may allow for the exchange of encryption keys to enable the transfer of encrypted digital data across the Display Port interface. This capability may enable protection of digital content transferred across the Display Port interface.

Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of such systems with some aspects of the present invention as set forth in the remainder of the present application with reference to the drawings.

BRIEF SUMMARY OF THE INVENTION

A system and/or method is provided which comprises a single device for handling client side and server side operations for A/V bridging and A/V bridging extensions, substantially as shown in and/or described in connection with at least one of the figures, as set forth more completely in the claims.

These and other advantages, aspects and novel features of the present invention, as well as details of an illustrated embodiment thereof, will be more fully understood from the following description and drawings.

BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a diagram illustrating an exemplary system for transfer of Display Port data across a network, in accordance with an embodiment of the invention.

FIG. 2 is a diagram illustrating exemplary bridging of Display Port traffic over Ethernet, in accordance with an embodiment of the invention.

FIG. 3 is a diagram illustrating an exemplary system enabled to transmit and/or receive Display Port and/or Ethernet data streams, in accordance with an embodiment of the invention.

FIG. 4A is a block diagram of an exemplary single IC device configured for use in a server system, in accordance with an embodiment of the invention.

FIG. 4B is a block diagram of an exemplary single IC device configured for use in a server system, in accordance with an embodiment of the invention.

FIG. 5A is a block diagram of an exemplary single IC device configured for use in a client system, in accordance with an embodiment of the invention.

FIG. 5B is a block diagram of an exemplary single IC device configured for use in a client system, in accordance with an embodiment of the invention.

FIG. 6 is a flowchart illustrating exemplary steps for a single IC device configured for use in a server system, in accordance with an embodiment of the invention.

FIG. 7 is a flowchart illustrating exemplary steps for a single IC device configured for use in a client system, in accordance with an embodiment of the invention.

 DETAILED DESCRIPTION OF THE INVENTION

Certain embodiments of the invention may be found in a method and system comprising a single device for handling client side and server side operations for A/V bridging and A/V bridging extensions. In one exemplary aspect of the invention, a single integrated circuit (IC) device may be configured to enable the transmission of Display Port mini-packets across a network. This exemplary aspect of the invention may be practiced in a server device, such as a video server. In another exemplary aspect of the invention, the single IC device may be configured to enable reception of Display Port mini-packets that were transported across a network. This exemplary aspect of the invention may be practiced in a client device, such as a computing device.

FIG. 1 is a diagram illustrating an exemplary system for transfer of Display Port data across a network, in accordance with an embodiment of the invention. Referring to FIG. 1, there is shown a computing cluster 102, a network 112, a computing device 122 and a multimedia monitor 124. The computing cluster 102 may comprise a video server 104, a file server 106, a database server 108 and a network management server 110.

The computing cluster 102 may comprise a plurality of servers, each of which may perform one or more specific tasks, or execute one or more specific applications. Each server may store data which may be accessible to users at computing devices 122, which are attached to the network 112. The servers within the computer cluster 102 may communicate with each other, and/or with the network 112 via Ethernet interfaces. The video server 104 may store computer graphics data in addition to storing video, audio and/or multimedia programs. The multimedia monitor 124 may enable the rendering and display of visual images comprising video and/or graphics, for example.

The video server 104 may comprise hardware and/or software, which enables processing of graphics, video, audio and/or multimedia data. The computer graphics, video, audio and/or multimedia stored at the video server 104 may be accessible via the network 112. In this application, video, which may also refer to digital video (including high definition video), may comprise uncompressed video, compressed video, encrypted uncompressed video and/or encrypted compressed video, for example. Audio may comprise uncompressed audio, compressed audio, encrypted uncompressed audio and/or encrypted compressed audio. The file server 106 may store one or more files. The file server 106 may be utilized, for example, to store files from various users. The database server 108 may store one or more database programs, applications and/or files. The network management server 110 may store information pertaining to the configuration and/or availability of various network communications devices and/or interfaces. The network management server 110 may utilize a protocol such as the simple network management protocol (SNMP). The computing device 122 and multimedia monitor 124 may communicate via Display Port interfaces. The computing device 122 may communicate with the network 112 via an Ethernet interface.

In an exemplary mode of operation, the video server 104 may encapsulate the video data in one or more Display Port mini-packets. The video data may be uncompressed. In turn, the video server 104 may encapsulate the one or more Display Port mini-packets in one or more Ethernet frames. Alternatively, the video server 104 may directly encapsulate the digital video data in one or more Ethernet frames. The format of the Ethernet frames may be specified in applicable standards documents, such as IEEE 802 standards. The Ethernet frames may contain an address (for example, in a destination address field within the Ethernet frames), which indicates that the Ethernet frames are to be transported across the network 112, and delivered to the computing device 122. The Ethernet frames may comprise a designation (for example, in an EtherType field of the Ethernet frames), which indicates that the Ethernet frames are being utilized to encapsulate Display Port mini-packets. The Ethernet frames may also comprise a traffic class identifier, which may enable the network 112 to provide services in accordance with AV Bridging specifications. These services may comprise prioritized transport of the Ethernet frames across the network 112 to enable the time duration for transport across the network 112 to meet latency targets associated with the specified traffic class.

The video server 104 may transport the Ethernet frames via an Ethernet interface connector 132 to the network 112. The Ethernet frames may subsequently be transported from the network 112 to the computing device 122 via an Ethernet interface connector 134. An exemplary Ethernet interface connector may be a category 5 cable.

Upon receipt of the Ethernet frames, the computing device 122 may determine (for example, based on an identifier in the EtherType field of the received Ethernet frames) that the received Ethernet frames contain Display Port mini-packets. The computing device 122 may de-encapsulate the Display Port mini-packets. The computing device 122 may subsequently send the de-encapsulated Display Port mini-packets to the multimedia monitor 124 via the Display Port interface connector 136. The Display Port interface connector 136 may enable physical connection between the computing device and the multimedia monitor 124 via a point-to-point connection. The digital video contained within the Display Port mini-packets may then be rendered for display at the multimedia monitor 124.

In various embodiments of the invention, point-to-point oriented traffic, which contains no destination identification information (such as a destination address, for example) may be encapsulated in Ethernet packets at a centralized server (such as a video server 104), and transported across a network 112 (such as a LAN, for example). The point-to-point oriented traffic may comprise Display Port mini-packets, or digital video (including high definition video) data generated by an application program, for example. The encapsulated traffic may be de-encapsulated at a network destination device (such as the computing device 122) and delivered to a destination multimedia device (such as the multimedia monitor 124). Thus, in various embodiments of the invention, from the perspective of the application(s), which enable the generation of the point-to-point oriented traffic, the centralized server (such as the video server 104) may transport the point-to-point oriented traffic across a network 112 to the destination multimedia device 124 as though the destination multimedia device 124 were directly attached to the centralized server via an interface, which is suitable for transport of the point-to-point oriented traffic. In an exemplary embodiment of the invention, the interface may be a Display Port interface, when the Ethernet frames encapsulate Display Port mini-packets. In another exemplary embodiment of the invention, the interface may be a DVI, when the Ethernet frames encapsulate digital video data suitable for transport via a DVI.

In various embodiments of the invention, the tasks performed by the computing device 122 may comprise reception of Ethernet frames via the Ethernet interface connector 134, determination that the Ethernet frames may contain encapsulated Display Port mini-packets, de-encapsulation of the Display Port mini-packets, and transfer of the de-capsulated Display Port mini-packets to the multimedia monitor 124 via the Display Port interface connector 136. In this regard, the video server 104 may generate instructions for rendering the video data on the multimedia monitor 124 within the Display Port mini-packets instead of requiring that this task be performed within the computing device 122. Thus, various embodiments of the invention may enable the computing device 122 to be a “thin client” device, which may not require high performance hardware and/or software capabilities to enable the generation of Display Port mini-packets for high performance video and/or graphics applications. This in turn may enable the rendering of high performance video and/or graphics on multimedia monitors 124 which are attached to low cost computing devices 122. Prior to the reception of the Ethernet frames, the computing device 122 may send a request to the video server 104. The video server 104 may respond to the request by sending the video data to the computing device 122 via the network 112.

FIG. 2 is a diagram illustrating exemplary bridging of Display Port traffic over Ethernet, in accordance with an embodiment of the invention. Referring to FIG. 2, there is shown the video server 104 (FIG. 1), the network 112, the computing device 122 and the multimedia monitor 124. The video server 104 may comprise digital video 202 and a plurality of protocol layers. The protocol layers may comprise a Display Port mini-packet layer 204, an Ethernet payload layer 212, a Display Port light physical (PHY-Lite) layer 206, an Ethernet medium access control (MAC) layer 214 and an Ethernet physical (PHY) layer 216. The network 112 may comprise one or more switching devices which comprise at least one Ethernet PHY layer 222 and 226 and at least one Ethernet MAC layer 224. The computing device 122 may comprise a plurality of protocol layers including an Ethernet payload layer 235, a Display Port Mini-Packet layer 236, an Ethernet MAC layer 234, an Ethernet PHY layer 232 and a Display Port PHY layer 244. The multimedia monitor 124 may comprise protocol layers related to the digital video 202 and to a plurality of protocol layers including a Display Port PHY layer 252 and a Display Port mini-packet layer 254. The Display Port PHY layer 244 may comprise suitable logic, circuitry and/or code that may enable generation of electrical and/or optical signals for transport via the Display Port interface connector 136. The Display Port PHY-Lite layer 206 may comprise logic, circuitry and/or code, which may enable generation of electrical and/or optical signals suitable for transport within the video server 104. However, the generated signals may not be suitable for transport of signals via an external interface.

In various embodiments of the invention, the digital video 202 may be generated by an application, which may be executing within the video server 104. The digital video 202 may then be encapsulated in Display Port mini-packets in the Display Port mini-packet layer 204. The Display Port mini-packets may also contain instructions to enable rendering of the digital video 202 on the multimedia monitor 124. A Graphics Processing Unit (GPU) may generate the Display Port mini-packets. The Display Port PHY-Lite layer 206 may enable reception of the Display Port mini-packets and generation of the line coded bits at a LAN subsystem within the video server 104. The line coded bits may be decoded and reassembled to form Ethernet payload(s). The Ethernet payload layer 212 may subsequently send the Ethernet payload(s) to the Ethernet MAC layer 214. The Ethernet MAC layer 214 may encapsulate the received Ethernet payload(s) in one or more Ethernet frames. The Ethernet frames may comprise information, which indicates that the Ethernet frames contain one or more encapsulated Display Port mini-packets and/or traffic class identification, for example. The Ethernet MAC layer 214 may send the Ethernet frames to the Ethernet PHY layer 216, which may enable transport of the Ethernet frames to the network 112 via the Ethernet interface connector 132. The traffic class identification may enable the utilization of AV Bridging services for the transport of the Ethernet frames within the network 112.

Within the network 112, the Ethernet PHY layer 222 within a switching device (such as an Ethernet switch) may receive the Ethernet frames via the Ethernet interface connector 132. One or more of the switching devices within the network 112 may support AV Bridging services. The Ethernet MAC layer 224 may enable the switching device to determine (based on the destination address field within the Ethernet frames, for example) that the computing device 122 is the destination device for receipt of the Ethernet frames. The Ethernet MAC layer 224 may send the Ethernet frames to the Ethernet PHY layer 226, which may enable transport of the Ethernet frames to the computing device 122 via the Ethernet interface connector 134.

Within the computing device 122, the Ethernet PHY layer 232 may receive the Ethernet frames via the Ethernet interface connector 134, which may be subsequently sent to the Ethernet MAC and MAC services layer 234. The Ethernet MAC and MAC services layer 234 may determine that the received Ethernet frames contain encapsulated Display Port mini-packets. The Ethernet MAC and MAC services layer 234 may de-encapsulate the Ethernet payloads from the received Ethernet frames. The Ethernet payload layer 235 may receive the Ethernet payload and generate one or more Display Port mini-packets. The Display Port mini-packets may then be sent to the Display Port mini-packet layer 236. The Display Port mini-packet layer 236 may determine that the received Display Port mini-packets are to be sent to the multimedia monitor 124. The Display Port mini-packet layer may send the Display Port mini-packets to the Display Port PHY layer 244, which may subsequently transmit the Display Port mini-packets to the multimedia monitor 124 via the Display Port interface connector 136.

Within the multimedia monitor 124, the Display Port PHY layer 252 may receive the Display Port mini-packets via the Display Port interface connector 136. The Display Port PHY layer 252 may send the received Display Port mini-packets to the Display Port mini-packet layer 254. The Display Port mini-packet layer 254 may extract the digital video 202 from the received Display Port mini-packets. The Display Port mini-packet layer 254 may also extract instructions contained within the Display Port mini-packets, which enable rendering of the digital video 202 at the multimedia monitor 124. The multimedia monitor 124 may then utilize the extracted instructions to display the digital video 202.

As shown in FIG. 2, in various embodiments of the invention, the video server 104 and the multimedia monitor 124 may process digital video, while the computing device 122 may not or may be limited in performance. Thus, in various embodiments of the invention, the computing device 122 may be a low cost appliance, which may not be required to comprise costly hardware and/or software to enable processing and/or rendering of high performance multimedia, video and/or graphics.

Various embodiments of the invention may not be limited to the transfer of Display Port mini-packets across a LAN. For example, in various embodiments of the invention, the Display Port mini-packets may be encapsulated within any of a variety of protocol data units (PDU) associated with higher layer protocols, for example a network layer protocol. An exemplary network layer protocol may be defined as set forth in a relevant protocol reference model (PRM), for example as specified by a standards organization such as the International Organization for Standardization (ISO).

In an exemplary embodiment of the invention, which utilizes a network layer protocol, Display Port mini-packets may be encapsulated within IP (Internet Protocol) packets. The IP packets may subsequently be encapsulated within Ethernet frames. Encapsulation of the Display Port mini-packets within IP packets may enable the transport of the encapsulated Display Port mini-packets across a network, such as the Internet. The transport of encapsulated Display Port mini-packets within IP packets may also utilize protocols such as the Reservation Protocol (RSVP) as defined by the Internet Engineering Task Force (IEFT), for example. The services provided by RSVP may be coordinated with AV Bridging services to support isochronous and/or real-time transmission of IP packets, which contain encapsulated Display Port mini-packets. In this regard, quality of service (QoS) aspects of RSVP (or similar higher layer protocol) may be mapped to the physical layer via AV Bridging to enable the transport of the encapsulated Display Port mini-packets across a network based on suitable bandwidth and latency targets.

Within the context of the ISO PRM, Ethernet functions related to medium access control (MAC) may be associated with the data link layer (DLL), while Ethernet functions related to line coding of data and generation of signals for transmission of bits via a physical medium may be associated with the physical layer (PHY). IP related functions may be associated with the network layer. At least a portion of a PDU for a given protocol layer may be encapsulated as a service data unit (SDU) within the PDU for the next lower protocol layer.

FIG. 3 is a diagram illustrating an exemplary system enabled to transmit and/or receive Display Port and/or Ethernet data streams, in accordance with an embodiment of the invention. Referring to FIG. 3 the system 300 may comprise a CPU 302, a memory controller hub (MCH) 304, a graphics processing unit (GPU) 306, a memory block 308, an input/output controller hub (ICH) 310, a low speed peripheral block 312, a LAN subsystem 314, a DP connector 316, an Ethernet connector 318a, an Ethernet connector 318b and memory 320.

The CPU 302 may comprise suitable logic, circuitry, and/or code that may enable processing data and/or controlling operations of the system 300. In this regard, the CPU 302 may be enabled to provide control signals to the various other blocks comprising the system 300. The CPU 302 may also enable execution of applications programs and/or code. The applications programs and/or code may enable generation of digital video and/or graphics. The CPU 302 may also enable the retrieval of stored digital video and/or graphics. The CPU 302 may be accessed via the MCH 304.

The MCH 304 may comprise suitable logic, circuitry, and/or code that may enable the storage and/or retrieval of data at high data transfer rates. For example, the MCH 304 may enable retrieval and/or storage of digital video and/or graphics data for high performance applications, such as high definition video, high resolution 3-D graphics, &c. In various embodiments of the invention, the MCH 304 may be referred to as a northbridge (NB).

The GPU 306 may comprise suitable logic, circuitry, and/or code for generating, rendering, and/or manipulating graphics data. The GPU 306 may output digital video and/or graphics. The GPU 306 may also output encrypted digital video and/or graphics for applications that utilize digital content protection, for example. The GPU 306 may encapsulate the digital video and/or graphics in Display Port mini-packets. The Display Port mini-packets generated by the GPU 306 may also comprise instructions, which enable rendering of the digital video and/or graphics for display on a multimedia monitor 124 (FIG. 1). The GPU 306 may also output protocol data units associated with other high definition (HD) protocols. The GPU 306 may comprise Display Port PHY layer functionality, which enables the GPU 306 to send and/or receive Display Port mini-packets via the Display Port connector 316.

The memory 308 may comprise suitable logic, circuitry, and/or code that may enable the storage and/or retrieval of data. For example, the memory 308 may enable the storage and/or retrieval of video and/or graphics data. The memory 308 may also enable the storage and/or retrieval of encryption keys, which may be utilized for encryption and/or decryption of data. The memory 308 may additionally store data, for example, configuration data and/or state variables utilized in controlling/configuring the various blocks of the system 300. The memory 308 may also enable the storage of code, which enables the execution of multimedia applications, for example. The memory 308 may utilize various technologies, such as dynamic random access memory (DRAM), which enable data to be stored and/or retrieved at sufficiently high data rates to enable high performance multimedia applications, for example.

The ICH 310 may comprise suitable logic, circuitry, and/or code that may enable the storage and/or retrieval of data from peripheral devices such as hard disk drives. The ICH 310 may also enable the retrieval of input signals and/or interrupt signals from peripheral devices, such as keyboard device and mouse devices, and/or other peripheral devices including various peripheral component interconnect (PCI) devices, for example. In various embodiments of the invention, the ICH 310 may be referred to as a southbridge (SB).

The LAN subsystem 314 may comprise suitable logic, circuitry, and/or code to enable the transmission and/or reception of Ethernet frames. The LAN subsystem 314 may comprise PHY layer functions and MAC layer functions. The LAN subsystem 314 may enable transmission and/or reception of Ethernet frames at various transfer rates, such as 10 Mbps, 100 Mbps, 1,000 Mbps (or 1 Gbps) and/or 10 Gbps, or other rates (for example, higher rates). The LAN subsystem 314 may also enable transmission and/or reception of Ethernet frames via wireless LANs (WLAN).

The PHY layer functions may enable transmission of Ethernet frames via a communication medium. The PHY layer functions may also enable reception of Ethernet frames via the communication medium. The PHY layer functions may generate signals for transmission that are suitable for the physical medium being utilized for transmitting the signals. For example, for an optical communication medium, the PHY layer may generate optical signals, such as light pulses, or for a wired communication medium, the PHY layer may generate electromagnetic signals.

The MAC layer functions may enable orderly communication between systems that are communicatively coupled via a shared communication medium. The MAC layer may comprise one or more coordination functions (CF) that enable a system to determine when it may attempt to access the shared communication medium. For example, in a wired communication medium, for example Ethernet, a CF may utilize a carrier sense multiple access with collision detection (CSMA/CD) algorithm. The MAC layer functions may implement mechanisms for scanning the communication medium to determine when it is available for transmission of signals. The MAC layer functions may comprise back off timer mechanisms, which may be utilized by a system to determine how often to attempt to access a communication medium, which is currently determined to be unavailable.

The MAC layer functions may also enable AV Bridging capabilities. In this regard, the MAC layer functions may determine a traffic class which is associated with transmitted Ethernet frames. Based on the determined traffic class, the MAC layer functions may perform traffic shaping by determining a time instant at which an Ethernet frame may be sent to the network via the Ethernet interface. That time instant may be determined based on a time instant at which one or more preceding Ethernet frames were also transmitted via the Ethernet interface. The time instant may also be determined based on stored “credits”, which may indicate a quantity of octets of Ethernet frame data that may be transmitted at “line rate” before transmission of subsequent Ethernet frames is suspended pending the accumulation of additional credits.

The MAC layer functions, which support AV Bridging, may also enable the end-to-end transport of Ethernet frames based on specified latency targets by initiating admission control procedures. The latency targets, which may specify a maximum time duration for the transport of Ethernet frame across the network, may be determined based on a specified traffic class. A destination Ethernet device may initiate admission control procedures by initiating a registration request across the network to the source Ethernet device. A successful registration may enable the network to reserve resources for the transport of Ethernet frames between the source Ethernet device and the destination Ethernet device, in accordance with the specified latency targets.

The Ethernet MAC layer functions may also enable an exchange of timing synchronization information between communicating Ethernet devices. Individual Ethernet MAC layer functions associated with each of a plurality of Ethernet devices within a LAN may exchange timing synchronization with the Ethernet MAC layer function associated with a specified Ethernet device associated with the LAN, wherein the specified Ethernet device may provide system timing for the plurality of Ethernet devices associated with the LAN. The traffic shaping and/or timing synchronization capabilities may enable AV Bridging services to support isochronous and/or real time services, such as streaming media services.

In various embodiments of the invention, the MAC layer functions within the LAN subsystem 314 may enable the reception of Display Port mini-packets and encapsulation of the received Display Port mini-packets within Ethernet frames. The Ethernet frames may utilize AV Bridging services when being transmitted via the network 112. The MAC layer functions within the LAN subsystem 314 may also enable the reception of Ethernet frames and the de-encapsulation of Display Port mini-packets from Ethernet frames, which are determined to contain encapsulated Display Port mini-packets.

In various embodiments of the invention, the MAC layer functions within the LAN subsystem 314 may enable the encapsulation of digital video 202 within Display Port mini-packets and encapsulation of Display Port mini-packets within Ethernet frames. The Ethernet frames may utilize AV Bridging services when being transmitted via the network 112. In an exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device by coupling a contact point in the IC package, within which is contained the LAN subsystem 314, to a determined logic level. For example, when the contact point is coupled to a logic level HI, the LAN subsystem 314 may be configured to enable the encapsulation of digital video 202 within Display Port mini-packets, encapsulation of the Display Port mini-packets within Ethernet frames, and transmission of the Ethernet frames via the network 112. A LAN subsystem 314 utilized within a video server 104 may be configured for this mode of operation, for example.

In another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on code, such as firmware and/or data stored within the memory 320. In another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on a control signal, Config_Cntl, received from the CPU 302. For example, when the control signal presents a logic level, Config_Cntl=HI, the LAN subsystem 314 may be configured to enable the encapsulation of digital video within Display Port mini-packets, encapsulation of the Display Port mini-packets within Ethernet frames, and transmission of the Ethernet frames via the network 112.

In another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on an internal fuse. The fuse may be configured during manufacture of the single IC device. For example, when the fuse is configured in an open state, the fuse may disable an electrical continuity path within the single IC. When the fuse in configured in the open state, for example, the LAN subsystem 314 may be configured to enable the encapsulation of digital video within Display Port mini-packets, encapsulation of the Display Port mini-packets within Ethernet frames, and transmission of the Ethernet frames via the network 112.

The MAC layer functions within the LAN subsystem 314 may also enable the reception of Ethernet frames and the de-encapsulation of Display Port mini-packets from Ethernet frames, which are determined to contain encapsulated Display Port mini-packets. In an exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device by coupling a contact point in the IC package, within which is contained the LAN subsystem 314, to a determined logic level. For example, when the contact point is coupled to a logic level LO, the LAN subsystem 314 may be configured to enable the reception of Ethernet frames, de-encapsulation of the Display Port mini-packets contained within the received Ethernet frames, and transmission of the Display Port mini-packets to a multimedia monitor 124. A LAN subsystem 314 utilized within a computing device 122 may be configured for this mode of operation, for example.

In another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on code, such as firmware and/or data stored within the memory 320. In yet another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on a control signal, Config_Cntl, received from the CPU 302. For example, when the control signal presents a logic level, Config_Cntl=LO, the LAN subsystem 314 may be configured to enable the reception of Ethernet frames, de-encapsulation of the Display Port mini-packets contained within the received Ethernet frames, and transmission of the Display Port mini-packets to a multimedia monitor 124.

In another exemplary embodiment of the invention, the LAN subsystem 314 may be configured to enable this mode of operation in a single IC device based on an internal fuse. The fuse may be configured during manufacture of the single IC device. For example, when the fuse is configured in a short state, the fuse may enable electrical continuity path within the single IC. When the fuse in configured in the short state, for example, the LAN subsystem 314 may be configured to enable the reception of Ethernet frames, de-encapsulation of the Display Port mini-packets contained within the received Ethernet frames, and transmission of the Display Port mini-packets to a multimedia monitor 124.

In various embodiments of the invention, the LAN subsystem 314 may comprise a single IC die, a plurality of IC die, a single IC or a plurality of ICs, which operate as a single device with a unified interface.

The Display Port connector 316 may enable physical connection of a Display Port interface connector 136 to the system 300. The physical connection may comprise at least conductors for each of the 4 lanes in the Display Port interface and for an auxiliary (AUX) channel. The 4 lanes may enable the transmission or reception of Display Port mini-packets, while the AUX channel may enable transmission and reception of control signals, input from peripheral devices, such as keyboards and/or mouse device, and for the exchange of encryption keys.

The Ethernet connector 318a may enable physical connection of an Ethernet interface connector 132 to the system 300. The Ethernet connector 318a may enable physical connection via an 8P8C connector and/or via in RJ45 connector, for example. The Ethernet connector 318b may be substantially similar to the Ethernet connector 318a.

Various embodiments of the invention may enable rendering of digital video 202 and/or graphics on a multimedia monitor 124, which has a direct physical connection to the system 300 via a Display Port interface connector 136 without requiring that the system 300 comprise digital video and/or graphics processing capabilities. In an exemplary embodiment of the invention, the system 300 may comprise a computing device 122. In operation, the system 300 may receive Ethernet frames via the Ethernet connector 318a. The LAN subsystem 314 within the computing device 122 may be configured to receive the Ethernet frames and determine that the received Ethernet frames contain encapsulated Display Port mini-packets. The LAN subsystem 314 may de-encapsulate the Display Port mini-packets. The LAN subsystem may utilize Display Port PHY layer 244 functionality to transmit the de-encapsulated Display Port mini-packets to a multimedia monitor 124 (FIG. 1) via the Display Port connector 316. The multimedia monitor 124 may render digital video 202 contained within the Display Port mini-packets for visual display.

The system 300 may utilize the AUX channel to transmit data signals. In an exemplary embodiment of the invention, a computing device 122 may send station identification information to the video server 104 via the AUX channel. The ability to send station identification information, for example, may enable the computing device 122 to be utilized in universal plug and play (UPnP) networks. The CPU 302 may generate the station identification information, which may be sent to the GPU 306 via the MCH 304. The GPU 306 may send the station identification information via the AUX channel.

Various embodiments of the invention may also enable the transmission of conventional Ethernet frames. The ICH 310 may receive signals generated in response to input from a keyboard device and/or from a mouse device, for example. The ICH 310 may receive the input from the keyboard device and/or mouse device via one or more PCI interfaces. The ICH 310 may convert the signals into input data. The ICH 310 may send the input data to the LAN subsystem 314. The LAN subsystem 314 may encapsulate the input data in one or more Ethernet frames. The Ethernet frames may contain a designation within the EtherType field, which indicates that the Ethernet frame may not comprise one or more encapsulated Display Port mini-packets. In this regard, the EtherType designation for Ethernet frames, which comprise one or more encapsulated Display Port mini-packets, may be distinguished from the EtherType designation for Ethernet frames, which do not comprise one or more Display Port mini-packets. The Ethernet frames may be transmitted via the Ethernet connector 318a.

Various embodiments of the invention may utilize a plurality of Ethernet connectors for the reception and/or transmission of Ethernet frames from one or more networks. In an exemplary embodiment of the invention, Ethernet frames, which encapsulate Display Port mini-packets, or which encapsulate digital video data, may be transmitted/received via the Ethernet connector 318a, while conventional Ethernet frames may be transmitted/received via the Ethernet connector 318b. In various embodiments of the invention, the Ethernet connector 318a may enable transmission and/or reception of Ethernet frames to/from a first network while the Ethernet connector 318b may enable transmission and/or reception of Ethernet frames to/from a second network.

In various embodiments of the invention, Ethernet frames, which encapsulate Display Port mini-packets, or which encapsulate digital video data, may be transmitted/received via either Ethernet connector 318a and/or 318b. Conventional Ethernet frames may be transmitted/received via either Ethernet connector 318a and/or 318b. In various embodiments of the invention, the LAN subsystem may enable the transmission and/or reception of Ethernet frames via a single Ethernet connector 318a or 318b, or via a plurality of Ethernet connectors comprising at least Ethernet connectors 318a and 318b.

In another exemplary embodiment of the invention, the system may comprise a video server 104. In operation, the CPU 302 may enable generation of digital video 202. The CPU 302 may also enable the retrieval of digital video 202 from memory 308. The MCH 304 may enable the high speed transfer of digital video 202 from the CPU 302 and/or from the memory 308 to the GPU 306. The GPU 306 may process the digital video to, for example, incorporate graphics. The GPU 306 may also generate instructions, which enable the rendering of the processed digital video on a multimedia monitor 124. The GPU 306 may generate one or more Display Port mini-packets, each of which may comprise at least a portion of the generated rendering instructions and/or processed digital video.

The GPU 306 may output the Display Port mini-packets to the LAN subsystem 314. The LAN subsystem 314 may be configured to encapsulate the Display Port mini-packets in Ethernet frames. The LAN subsystem 314 may utilize Ethernet MAC layer 214 functionality to enable the utilization of AV Bridging capabilities for the transport of the Ethernet frames via the network 112. The LAN subsystem 314 may utilize Ethernet PHY layer 216 functionality to enable the transmission of the Ethernet frames via the Ethernet connector 318a.

FIG. 4A is a block diagram of an exemplary single IC device configured for use in a server system, in accordance with an embodiment of the invention. FIG. 4A shows an exemplary embodiment of the LAN subsystem 314, which is configured for use in a server system. Referring to FIG. 4A, there is shown a single IC device 400, a GPU 306 (from FIG. 3), an ICH (from FIG. 3), a Display Port connector 316, Ethernet connectors 318a and 318b and 10 GBASE-T PHY layer blocks 436a and 436b. The single IC device 400 may comprise a MAC client 422a, MAC client 422b, time stamp shims 424a and 424b, 10G Ethernet MAC block 426, Display Port to Ethernet block 432, PCI to Ethernet block 434 and a Display Port PHY-Lite layer 206 (from FIG. 2).

The GPU 306 may encapsulate data in one or more Display Port mini-packets. The Display Port mini-packets may comprise an identifier, which indicates whether the Display Port mini-packets contain video data or other types of data. The GPU 306 may transmit Display Port mini-packets, which contain video data, via the Video Main Lanes [3:0]. The GPU 306 may transmit AUX channel data, via the AUX Channel.

The single IC device 400 may comprise suitable logic, circuitry and/or code that may be configured to enable encapsulation of digital video within Display Port mini-packets, encapsulation of the Display Port mini-packets within one or more Ethernet frames and transmission of the Ethernet frames via the Ethernet connector 318. The Display Port PHY-Lite layer 206 may receive Display Port mini-packets via at least the Video Main Lanes [3:0] and may receive AUX channel data via at least the AUX Channel. The Display Port PHY-Lite layer 206 may generate binary bits.

In various embodiments of the invention, the Display Port PHY-Lite layer 206 may comprise a transmitter (TX) block, a receiver (RX) block, a transceiver (TX/RX) block and a selector switch. The TX block receives input signals from the Video Main Lanes [3:0] interface. The TX/RX block receives input signals from the AUX Channel interface and outputs the received signals to the interface 440. The TX/RX block also receives input signals from the interface 440 and outputs the received signals to the AUX Channel interface.

The Display Port PHY-Lite layer 206 may receive an input configuration control signal, Config_Cntl, which configures the Display Port PHY-Lite layer 206 for use in a server system. When the Display Port PHY-Lite layer 206 is configured for use in a server system, the selector switch couples the output of the TX block to the interface 440. In this aspect of the invention, the TX block may receive input signals from the Video Main Lanes [3:0] interface and outputs the received signals to the interface 440 via the selector switch. When the Display Port PHY-Lite layer 206 is configured for use in a server system, the RX block may be inactive. When the TX/RX block receives and/or transmits AUX channel data, the selector switch may be configured such that the TX block and RX block are inactive. When the TX/RX block receives and/or transmits AUX channel data, the selector switch may be configured such that the TX block and RX block are inactive.

The Display Port to Ethernet block 432 may enable reception of bits from a Display Port PHY-Lite layer 206. The Display Port to Ethernet block 432 may enable assembly of the bits to form one or more Ethernet payloads. An Ethernet payload may comprise one or more bits from one or more Display Port mini-packets, MP. In an exemplary embodiment of the invention, the Ethernet payload may comprise a plurality of concatenated Display Port mini-packets. In another exemplary embodiment of the invention, the Ethernet payload may comprise a concatenation of payloads from a plurality of Display Port mini-packets with a single Display Port mini-packet header appended to the concatenated payloads.

The MAC client 422a may receive Ethernet payloads from the Display Port to Ethernet block 432 and encapsulate the Ethernet payloads in one or more Ethernet frames, EF1. The Ethernet frames, EF1, may comprise EtherType=DP (where DP may represent a numerical value), which indicates that the Ethernet frames EF1 contain encapsulated Display Port mini-packets. In addition, the Ethernet frames, EF1, may also comprise a field EtherTypeSubType=VID (where VID may represent a numerical value), which indicates that the Display Port mini-packets may contain video data. The Ethernet frames, EF1, may comprise a field EtherTypeSubType=AUX (where AUX may represent a numerical value), which indicates that the Ethernet payloads contain AUX channel data. The subtype may also indicate one or a plurality of multimedia monitors, attached to a computing device, which is to receive the Display Port mini-packets.

The ICH 310 may enable reception of input signals from peripheral devices and the generation of bits from the received input signals. The generated bits may be transmitted via a PCI interface.

The PCI to Ethernet block 434 may enable reception of bits from a PCI interface. The bits may be generated based on input received from a peripheral device. The PCI to Ethernet block 434 may enable assembly of the bits to construct one or more Ethernet payloads EP.

The MAC client 422b may receive Ethernet payloads, EP, and encapsulate the Ethernet payloads in one or more Ethernet frames, EF2. The Ethernet frames EF2 may comprise EtherType≠DP, which indicates that the Ethernet frames EF2 may not contain Display Port mini-packets.

The time stamp shims 424a and 424b may receive Ethernet frames EF1 and EF2 from the corresponding MAC clients 422a and 422b. The time stamp shims 424a and 424b may append time synchronization information, such as a time stamp, to the Ethernet frames EF1 and EF2 based on an EtherType designation, for example. The time stamp shims 424a and 424b may append a time stamp when the EtherType field indicates that the Ethernet frame is to utilize AV Bridging capabilities for transport across a network 112, for example.

The 10G Ethernet MAC block 426 may enable the transmission of the Ethernet frames EF1 and EF2 via the network 112. The 10G Ethernet MAC block 426 may enable generation of header information within the Ethernet frames, which enable the utilization of AV Bridging services within the network 112 for transport of the Ethernet frames. The 10G Ethernet MAC block 426 may also enable traffic shaping of transmitted Ethernet frames by determining time instants at which the Ethernet frames EF1 and EF2 may be transmitted to the network 112. The 10G Ethernet MAC block 426 may also enable generation of header information within the Ethernet frames, which utilize conventional Ethernet services within the network 112. The conventional Ethernet services may not utilize traffic shaping and/or AV Bridging services, for example. In various embodiments of the invention, Ethernet frames, which utilize conventional Ethernet services, may be transported via a network, which is separate from the network 112. The 10G Ethernet MAC block 426 may enable determination of a network, which is to be utilized for the transport of Ethernet frames EF1 and/or EF2.

The 10GBASE-T PHY layer 436a may enable the reception of bits from Ethernet frames. The 10 GBASE-T PHY layer 436a may line encode the received bits to enable transmission via an Ethernet connector 318a. The 10 GBASE-T PHY layer 436b may be substantially similar to the 10 GBASE-T PHY layer 436a. The 10 GBASE-T PHY layer 436b may line encode the received bits to enable transmission via an Ethernet connector 318b. 10G is an exemplary Ethernet bit rate; various embodiments of the invention may also be practiced at other bit rates suitable for carrying HD traffic.

The 10GBASE-T PHY layer 436a may also receive line coded bits via the Ethernet connector 318a. The 10GBASE-T PHY layer 436b may also receive line coded bits via the Ethernet connector 318b. The 10GBASE-T PHY layer 436a or 436b may decode the received line coded bits, which may be sent to the 10G Ethernet MAC block 426. The 10G Ethernet MAC block 426 may assemble the received decoded bits to construct one or more Ethernet frames EFR. The 10G Ethernet MAC block 426 may determine whether the constructed Ethernet frames EFR contain one or more Display Port mini-packets, MPR, or Ethernet payloads, EPR, which may not contain Display Port mini-packets. The 10G Ethernet MAC block 426 may make the determination based on a designation within EtherType field within the received Ethernet frames EFR. The 10G Ethernet MAC block 426 may send the Ethernet frames EFR to the time stamp shim 424a or 424b.

The time stamp shim 424a may send Ethernet frames, EFR, which contain encapsulated Display Port mini-packets, to the MAC client 422a. Additionally, the MAC client 422a may determine whether the Ethernet frames contain Display Port mini-packets or AUX Channel data based on an EtherTypeSubType field within the Ethernet frames. At a video server 104, received Ethernet frames may contain AUX channel data. The MAC client 422a may de-encapsulate the AUX channel data from the Ethernet frames EFR. The MAC client 422a may send the AUX channel data to the Display Port to Ethernet block 432. The Display Port to Ethernet block 432 may convert the AUX channel data to bits, which may be sent to the Display Port PHY-Lite layer 206. The Display Port PHY-Lite layer 206 may send the AUX channel data to the GPU 306 via the AUX Channel. The GPU 306 may transfer the AUX channel data to the MCH 304. The MCH 304 may in turn transfer the AUX channel data to the CPU 302, which may process the data. The AUX channel data may be sent to the multimedia monitor 124 via the AUX Channel.

The time stamp shim 424b may send Ethernet frames, EFR, which do not contain encapsulated Display Port mini-packets to the MAC client 422b. The MAC client 422b may de-encapsulate the Ethernet payloads, EPR, from the received Ethernet frames EFR. The MAC client 422b may send the Ethernet payloads EPR to the PCI to Ethernet block 434. The PCI to Ethernet block 434 may convert the Ethernet payloads EPR to signals, which may be sent to the ICH 310. The ICH 310 may convert the signals to bits, which may be sent to the CPU 302 via the MCH 304. The CPU 302 may process the data.

FIG. 4B is a block diagram of an exemplary single IC device configured for use in a server system, in accordance with an embodiment of the invention. FIG. 4B shows an exemplary embodiment of the LAN subsystem 314, which is configured for use in a server system. FIG. 4B differs from FIG. 4A in that the exemplary single IC device shown in FIG. 4B incorporates the 10GBASE-T PHY layer blocks 436a and 436b from FIG. 4A. Referring to FIG. 4B, there is shown a single IC device 450, a GPU 306 (from FIG. 3), an ICH (from FIG. 3), a Display Port connector 316 and Ethernet connectors 318a and 318b. The single IC device 450 may comprise a MAC client 422a, MAC client 422b, time stamp shims 424a and 424b, 10G Ethernet MAC block 426, Display Port to Ethernet block 432, PCI to Ethernet block 434, a Display Port PHY-Lite layer 206 (from FIG. 2) and 10GBASE-T PHY layer blocks 436a and 436b.

FIG. 5A is a block diagram of an exemplary single IC device configured for use in a client system, in accordance with an embodiment of the invention. FIG. 5A shows an exemplary embodiment of the LAN subsystem 314, which is configured for use in a client system. Referring to FIG. 5A, there is shown a single IC device 500, a GPU 306 (from FIG. 3), an ICH (from FIG. 3), a Display Port connector 316, Ethernet connectors 318a and 318b and 10GBASE-T PHY layer blocks 436a and 436b. The single IC device 500 may comprise a MAC client 422a, MAC client 422b, time stamp shims 424a and 424b, 10G Ethernet MAC block 426, Display Port to Ethernet block 432, PCI to Ethernet block 434 and a Display Port PHY layer 244 (from FIG. 2).

The single IC device 500 may comprise suitable logic, circuitry and/or code that may be configured to enable reception of Ethernet frames via the Ethernet connector 318, which encapsulate Display Port mini-packets, de-encapsulation of the Display Port mini-packets and transmission of the Display Port mini-packets, which contain digital video 202, via the Display Port connector 316.

The 10GBASE-T PHY layer 436a may receive line coded bits via the Ethernet connector 318a. The 10 GBASE-T PHY layer 436b may receive line coded bits via the Ethernet connector 318b. The 10GBASE-T PHY layer 436a or 436b may decode the received line coded bits, which may be sent to the 10G Ethernet MAC block 426. The 10G Ethernet MAC block 426 may assemble the received decoded bits to construct one or more Ethernet frames EFR. The 10G Ethernet MAC block 426 may determine whether the constructed Ethernet frames EFR contain one or more Display Port mini-packets, MPR, or Ethernet payloads, EPR, which may not contain Display Port mini-packets. The 10G Ethernet MAC block 426 may make the determination based on a designation within EtherType field within the received Ethernet frames EFR. The 10G Ethernet MAC block 426 may send the Ethernet frames EFR to the time stamp shim 424a or 424b.

The time stamp shim 424a may send Ethernet frames, EFR, which contain encapsulated Display Port mini-packets, to the MAC client 422a. Additionally, the MAC client 422a may determine whether the Ethernet frames contain video data or AUX Channel data based on an EtherTypeSubType field within the Ethernet frames. At a computing device 122, received Display Port mini-packets MPR may contain video data. The computing device 122 may also receive AUX Channel data. The MAC client 422a may de-encapsulate the Display Port mini-packets MPR (or AUX channel data) from the Ethernet frames EFR. The MAC client 422a may send the Display Port mini-packets MPR (or AUX channel data) to the Display Port to Ethernet block 432. The Display Port to Ethernet block 432 may convert the Display Port mini-packets MPR to bits, which may be sent to the Display Port PHY layer 244. The Display Port to Ethernet block 432 may also send AUX channel data to the Display Port PHY layer 244. The Display Port PHY layer 244 may assemble the bits to reconstruct the Display Port mini-packets MPR.

In the case where the Display Port mini-packets contain video data, the Display Port mini-packets may be sent to the Display Port connector 316 via the Video Main Lanes [3:0]. The Display Port mini-packets may be sent to the multimedia monitor 124 for display. In instances where the Ethernet frames may comprise AUX channel data, the AUX channel data may be sent to the GPU 306 via the AUX Channel. The GPU 306 may transfer the data to the MCH 304. The MCH 304 may in turn transfer the data retrieved from the received Display Port mini-packets to the CPU 302, which may process the data.

In various embodiments of the invention, the Display Port PHY layer 244 may comprise a transmitter (TX) block, a receiver (RX) block, a transceiver (TX/RX) block and a selector switch. The TX/RX block receives input signals from the AUX Channel interface and outputs the received signals to the interface 440. The TX/RX block also receives input signals from the interface 440 and outputs the received signals to the AUX Channel interface.

The Display Port PHY layer 244 may receive an input configuration control signal, Config_Cntl, which configures the Display Port PHY layer 244 for use in a client system. When the Display Port PHY layer 244 is configured for use in a client system, the selector switch couples the input of the RX block to the interface 440. In this aspect of the invention, the RX block may receive input signals from the interface 440 via the selector switch and outputs the received signals to the Video Main Lanes [3:0] interface. When the Display Port PHY layer 244 is configured for use in a client system, the TX block may be inactive. When the TX/RX block receives and/or transmits AUX channel data, the selector switch may be configured such that the TX block and RX block are inactive.

The time stamp shim 424b may send Ethernet frames, EFR, which do not contain encapsulated Display Port mini-packets to the MAC client 422b. The MAC client 422b may de-encapsulate the Ethernet payloads, EPR, from the received Ethernet frames EFR. The MAC client 422b may send the Ethernet payloads EPR to the PCI to Ethernet block 434. The PCI to Ethernet block 434 may convert the Ethernet payloads EPR to signals, which may be sent to the ICH 310. The ICH 310 may convert the signals to bits, which may be sent to the CPU 302 via the MCH 304. The CPU 302 may process the data.

In an exemplary embodiment of the invention, the LAN subsystem 314 may comprise the Display Port to Ethernet block 432, the Display Port PHY layer 244, the MAC clients 422a and 422b, the time stamp shims 424a and 424b, the 10G Ethernet MAC block 426 and the PCI to Ethernet block 434. In another exemplary embodiment of the invention, the LAN subsystem 314 may comprise the Display Port to Ethernet block 432, the Display Port PHY layer 244, the MAC clients 422a and 422b, the time stamp shims 424a and 424b, the 10G Ethernet MAC block 426, the PCI to Ethernet block 434 and the 10GBASE-T PHY layer blocks 436a and 436b.

In various embodiments of the invention, the video server 104 may selectively transmit digital video 202 to one or more of a plurality of video monitors 124, each of which may be connected, by point-to-point connection, to a corresponding computing device 122.

The video server 104 may generate Display Port mini-packets, which may be selectively displayed on one or more of a plurality of multimedia monitors. In this regard, the physical Video Main Lanes [3:0] and AUX Channel group shown in FIG. 4, may represent a plurality of logical Video Main Lanes [3:0] and AUX Channel groups, wherein each logical group may correspond to one of the plurality of multimedia monitors 124. Each logical group may be distinguished based on the Ethernet MAC address associated with the computing device 122 to which the multimedia monitor 124 may be connected by point-to-point connection, for example.

The GPU 306 within the video server 104 may generate Display Port mini-packets comprising digital video 202 for rendering at the selected multimedia monitor 124, which is attached to the destination computing device 122. The GPU 306 may select a logical Video Main Lanes [3:0] and AUX Channel group, which corresponds to the selected multimedia monitor 124 based on the Ethernet MAC address associated with the computing device 122, to which the multimedia monitor 124 may be connected. The GPU 306 may generate one or more Display Port mini-packets, which may be sent to the Display Port-Lite layer 206 via the Video Main Lanes [3:0]. The Display Port mini-packet may comprise a destination identifier, which identifies a logical Video Main Lanes [3:0] and AUX Channel group, which in turn identifies the destination computing device 122. The Display Port mini-packets may be sent from the Display Port-Lite layer 206 to the Display Port to Ethernet block 432. The Display Port to Ethernet block 432 may in turn send the Display Port mini-packets to the MAC client 422a.

The MAC client 422a may encapsulate the Display Port mini-packets in Ethernet frames and send the Ethernet frames to the 10G Ethernet MAC block 426. The MAC client 422a may designate a value in the Destination Address field within the Ethernet frame, which corresponds to the MAC address for the destination computing device 122, based on the destination identifier information associated with the received Display Port mini-packets. The Ethernet frames may be sent to the time stamp shim 424a, which may insert a time stamp within the Ethernet frame. The time stamped Ethernet frame may then be sent to the 10G Ethernet MAC block 426.

The 10G Ethernet MAC block 426 may generate a value for insertion in the EtherTypeSubType field within the Ethernet frames based on whether the Ethernet frames encapsulate Display Port mini-packets or AUX channel data. The 10G Ethernet MAC block may also insert fields within the Ethernet header which enable the utilization of AV Bridging capabilities for the transport of the Ethernet frame within the network 112, for example a traffic class designation. The Ethernet frames may be sent to the 10GBASE-T PHY block 436a or 436b, which may subsequently transmit bits via the corresponding Ethernet connector 318a or 318b. The Ethernet frames may be transmitted via the network 112 or another network. The destination address for the Ethernet frames may indicate that the destination is the computing device 122, which is connected via a point-to-point connection to the selected multimedia monitor 124.

Similarly, each of the multimedia monitors 124 may transmit AUX channel data to the video server 104, for example encryption keys. The AUX channel data may be transmitted via a corresponding AUX channel and received by the Display Port PHY layer 244. The AUX channel data may be generated by the CPU 302 and communicated to the GPU 306 via the MCH 304. The GPU 306 may send the AUX channel data via the AUX channel. The AUX channel data may be sent to the Display Port to Ethernet block 432. The Display Port to Ethernet block 432 may in turn send the AUX channel data to the MAC client 422a. The MAC client 422a may encapsulate the AUX channel data in Ethernet frames and send the Ethernet frames to the 10G Ethernet MAC block 426.

The 10G Ethernet MAC block 426 may send the Ethernet frames to the 10GBASE-T PHY block 436a or 436b, which may subsequently transmit bits via the corresponding Ethernet connector 318a or 318b. The Ethernet frames may be transmitted via the network 112 or another network. The Destination Address within the Ethernet frames may indicate that the destination is the video server 104. The Source Address within the Ethernet frames may indicate the computing device 122 from which the Ethernet frames were sent. The video server 104 may receive the Ethernet frames, which contain Display Port mini-packets. The video server 104 may identify the multimedia monitor 124 associated with the Display Port mini-packets based on the Source Address field contained within the received Ethernet frames.

FIG. 5B is a block diagram of an exemplary single IC device configured for use in a client system, in accordance with an embodiment of the invention. FIG. 5B shows an exemplary embodiment of the LAN subsystem 314, which is configured for use in a client system. FIG. 5B differs from FIG. 5A in that the exemplary single IC device shown in FIG. 5B incorporates the 10 GBASE-T PHY layer blocks 436a and 436b from FIG. 5A. Referring to FIG. 5B, there is shown a single IC device 550, a GPU 306 (from FIG. 3), an ICH (from FIG. 3), a Display Port connector 316 and Ethernet connectors 318a and 318b. The single IC device 550 may comprise a MAC client 422a, MAC client 422b, time stamp shims 424a and 424b, 10G Ethernet MAC block 426, Display Port to Ethernet block 432, PCI to Ethernet block 434, a Display Port PHY-Lite layer 206 (from FIG. 2) and 10 GBASE-T PHY layer blocks 436a and 436b.

Various embodiments of the invention as shown in FIGS. 4A, 4B, 5A and 5B may not be limited to 10G Ethernet networks, but may also be practiced in 10BASE-T networks, 100BASE-TX networks, 2.5G networks, 5G networks, 40G networks, 100G networks and/or 1000G networks, for example. Various embodiments of the invention may be practiced in networks, which utilize copper-based interfaces as well as optical-based interfaces.

FIG. 6 is a flowchart illustrating exemplary steps for a single IC device configured for use in a server system, in accordance with an embodiment of the invention. The flowchart of FIG. 6 is exemplary as various embodiments of the invention may also be practiced with other digital video protocols, including HD video. Referring to FIG. 6, the single IC device 450 may be configured, based on a control signal, an external pin and/or an internal fuse (as described above), for use in a server system. In step 602, the GPU 306 within the video server 104 may encapsulate digital video in Display Port mini-packets. In step 604, an EtherTypeSubType field value may be set to a value indicating that the Display Port mini-packets encapsulate digital video. In step 606, the Display Port mini-packets may be encapsulated in Ethernet frames by the MAC client 422a within the LAN subsystem 314. The Ethernet frames may comprise the EtherTypeSubType field designation determined in step 604. In step 608, the 10G Ethernet MAC block 426 may determine an AV Bridging traffic class. In step 610, the LAN subsystem 314 may transmit the Ethernet frames via the network 112 to the computing device 122.

FIG. 7 is a flowchart illustrating exemplary steps for a single IC device configured for use in a client system, in accordance with an embodiment of the invention. The flowchart of FIG. 7 is exemplary as various embodiments of the invention may also be practiced with other digital video protocols, including HD video. Referring to FIG. 7, the single IC device 550 may be configured, based on a control signal, an external pin and/or an internal fuse (as described above), for use in a client system. In step 702, the computing device 122 may receive Ethernet frames from the video server 104 via the network 112. Step 704 may determine whether the received Ethernet frames contain Display Port mini-packets or AUX Channel data. When the received Ethernet frames do not contain Display Port mini-packets or AUX Channel data, in step 706, the received Ethernet frames may be processed utilizing conventional Ethernet processing. In this regard, the Ethernet frames may be sent to the MAC client 422b within the LAN subsystem 314.

When the received Ethernet frames contain Display Port mini-packets or AUX Channel data, in step 708, the MAC client 422a may de-encapsulate the Display Port mini-packets or AUX Channel data from the Ethernet frames. Step 710 may determine whether the Ethernet frames contain Display Port mini-packets, which encapsulate digital video. When the Ethernet frames contain Display Port mini-packets, which contain digital video, in step 712, the Display Port mini-packets may be sent to the multimedia monitor 124. The multimedia monitor 124 may render the digital video on the monitor. When the Ethernet frames do not contain Display Port mini-packets, which encapsulate digital video, in step 714, the AUX Channel data may be sent via an AUX channel to the GPU 306 and/or multimedia monitor 124. The data sent to the GPU 306 may subsequently be sent to the CPU 302.

Exemplary aspects of a single device for handling server side operations for A/V bridging and A/V bridging extensions may comprise a single IC device 450 configured to enable encapsulation of generated digital video data 202 within an encapsulating PDU. The encapsulating PDU may be an Ethernet frame or an IP packet. The generated digital video data 202 may itself be encapsulated within one or more Display Port mini-packets, in which case, the Display Port mini-packet(s) with encapsulated generated digital video data 202 may be encapsulated within the encapsulating PDU(s). The single IC device 450 may enable determination of a traffic class designation associated with the encapsulating PDU. The single IC device 450 may enable transmission of the encapsulating PDU via a network 112 based on the traffic class designation. The single IC device 450 may enable indication of whether the transmitted encapsulating PDU encapsulated the generated digital video 202 based on at least one data type identifier. The data type identifiers may comprise an EtherType and an EtherTypeSubType.

Exemplary aspects of a single device for handling client side operations may include a single IC device 550 configured to enable extraction of received digital video data that is encapsulated within an encapsulating PDU. The encapsulating PDU may be an Ethernet frame or an IP packet. The encapsulating PDU may be received via a network 112 at a destination device, such as a computing device 122. The single IC 550 device may enable transmission of the received digital video data to a multimedia monitor 124 coupled to the destination device via an interface connector, such as a Display Port interface connector 136. The single IC device 550 may enable extraction of the received digital video from the encapsulating PDU based on a data type. The data type may be determined based on at least one data type identifier. The data type identifier may comprise an EtherType and an EtherTypeSubType. In various embodiments of the invention, the received digital video data 202 may be encapsulated within one or more Display Port mini-packets, in which case, the Display Port mini-packet(s) with encapsulated received digital video data may be encapsulated within the encapsulating PDU(s). Thus, the data type identifiers may enable determination of when the encapsulating PDU(s) comprise one or more Display Port mini-packets and/or when the received digital video data is encapsulated within the Display Port mini-packet(s).

The single IC device may be configured for server side operations and/or client side operations based on a control signal, an internal fuse, firmware and/or a determined logic level coupled to a contact point to the single IC device. The control signal may enable dynamic configuration of the single IC device.

Another embodiment of the invention may provide a machine-readable storage, having stored thereon, a computer program having at least one code section executable by a machine, thereby causing the machine to perform the steps as described herein for a single device for handling client side and server side operations for A/V bridging and A/V bridging extensions.

Accordingly, the present invention may be realized in hardware, software, or a combination of hardware and software. The present invention may be realized in a centralized fashion in at least one computer system, or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods described herein is suited. A typical combination of hardware and software may be a general-purpose computer system with a computer program that, when being loaded and executed, controls the computer system such that it carries out the methods described herein.

The present invention may also be embedded in a computer program product, which comprises all the features enabling the implementation of the methods described herein, and which when loaded in a computer system is able to carry out these methods. Computer program in the present context means any expression, in any language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to another language, code or notation; b) reproduction in a different material form.

While the present invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from its scope. Therefore, it is intended that the present invention not be limited to the particular embodiment disclosed, but that the present invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A method for communicating data, the method comprising:

configuring a single integrated circuit (IC) device for one or both of client side operation and server side operation, wherein: said client side operation enables extraction of received digital video data encapsulated within an encapsulating protocol data unit (PDU); and transmission of said extracted received digital video data to a multimedia monitor via an interface connector; and said server operations enables encapsulation of generated digital video data within an encapsulating PDU; and transmission of said encapsulated PDU based on a traffic class designation associated with said encapsulating PDU.

2. The method according to claim 1, comprising receiving said encapsulating protocol data unit (PDU) via a network at a destination device comprising said single IC device.

3. The method according to claim 2, wherein said multimedia monitor is coupled to said destination device via said interface connector.

4. The method according to claim 3, wherein said multimedia monitor enables rendering of said received digital video data thereon.

5. The method according to claim 1, comprising determining said traffic class designation associated with said encapsulating PDU.

6. The method according to claim 1, comprising transmitting said encapsulating PDU via a network based on said traffic class designation.

7. The method according to claim 1, wherein said received encapsulating PDU comprises an Ethernet frame and/or an Internet Protocol (IP) packet.

8. The method according to claim 1, wherein said transmitted encapsulating PDU comprises an Ethernet frame and/or an Internet Protocol (IP) packet.

9. The method according to claim 1, comprising extracting said received digital video data from said encapsulating PDU based on a data type.

10. The method according to claim 9, wherein said data type is determined based on at least one data type identifier.

11. The method according to claim 10, wherein said at least one data type identifier comprises an EtherType and an EtherTypeSubType.

12. The method according to claim 1, comprising indicating whether said transmitted encapsulating PDU encapsulates said generated digital video data based on at least one data type identifier.

13. The method according to claim 12, wherein said at least one data type identifier comprises an EtherType and an EtherTypeSubType.

14. The method according to claim 1, wherein said single IC device is configured for at least said client operations and/or said server operations by one or more of: a control signal, an internal fuse, firmware and/or a determined logic level coupled to a contact on said single IC device.

15. The method according to claim 14, comprising dynamically configuring said single IC device based on said control signal.

16. A system for communicating data, the system comprising:

a single integrated circuit (IC) device that enables configuration for one or both of client side operation and server side operation, wherein: said client side operation enables extraction of received digital video data encapsulated within an encapsulating protocol data unit (PDU); and transmission of said extracted received digital video data to a multimedia monitor via an interface connector; and said server operations enables encapsulation of generated digital video data within an encapsulating PDU; and transmission of said encapsulated PDU based on a traffic class designation associated with said encapsulating PDU.

17. The system according to claim 16, wherein said single IC device enables reception of said encapsulating protocol data unit (PDU) via a network at a destination device comprising said single IC device.

18. The system according to claim 17, wherein said multimedia monitor is coupled to said destination device via said interface connector.

19. The system according to claim 18, wherein said multimedia monitor enables rendering of said received digital video data thereon.

20. The system according to claim 16, wherein said single IC device enables determination of said traffic class designation associated with said encapsulating PDU.

21. The system according to claim 16, wherein said single IC device enables transmission of said encapsulating PDU via a network based on said traffic class designation.

22. The system according to claim 16, wherein said received encapsulating PDU comprises an Ethernet frame and/or an Internet Protocol (IP) packet.

23. The system according to claim 16, wherein said transmitted encapsulating PDU comprises an Ethernet frame and/or an Internet Protocol (IP) packet.

24. The system according to claim 16, wherein said single IC device enables extraction of said received digital video data from said encapsulating PDU based on a data type.

25. The system according to claim 24, wherein said data type is determined based on at least one data type identifier.

26. The system according to claim 25, wherein said at least one data type identifier comprises an EtherType and an EtherTypeSubType.

27. The system according to claim 16, wherein said single IC device enables indication of whether said transmitted encapsulating PDU encapsulates said generated digital video data based on at least one data type identifier.

28. The system according to claim 27, wherein said at least one data type identifier comprises an EtherType and an EtherTypeSubType.

29. The system according to claim 16, wherein said single IC device is configured for at least said client operations and/or said server operations by one or more of: a control signal, an internal fuse, firmware and/or a determined logic level coupled to a contact on said single IC device.

30. The system according to claim 29, wherein said single IC device enables dynamic configuration based on said control signal.

Patent History
Publication number: 20080285572
Type: Application
Filed: Aug 3, 2007
Publication Date: Nov 20, 2008
Inventor: Wael William Diab (San Francisco, CA)
Application Number: 11/833,854
Classifications
Current U.S. Class: Bridge Or Gateway Between Networks (370/401)
International Classification: H04L 12/28 (20060101);