Abstract: Methods and apparatus for improving the upstream data transfer rate for a cable modem. A device that shares an upstream channel with other devices determines whether, based on particular data, an upstream channel data transfer rate can be improved over a current data transfer rate of a current upstream channel from the device to a remote system. If the upstream channel data rate can be improved, the device improves the upstream channel data transfer rate based, at least in part, on the particular data used to determine whether the data transfer rate can be improved.

Abstract: A process control system is provided having a plurality of I/O devices in communication using a bus. A primary redundant I/O device and a secondary redundant I/O device are coupled to the bus, where the secondary redundant I/O device is programmed to detect a primary redundant I/O device fault. The secondary redundant I/O device, upon detecting the primary redundant I/O device fault, publishes a primary redundant I/O device fault message on the bus. The controller may deactivate the primary redundant I/O device and activate the secondary redundant I/O device responsive to the primary redundant I/O device fault message.

Abstract: A bi-directional detector which enables a host and a client in a collection terminal is disclosed. The bi-directional detector includes a client detection unit in the host part, for detecting the clients connected to the host part; a client identification unit for identifying types of the clients detected by the client detection unit; a host detection unit in each of the clients for detecting the host part; and a switch unit in each of the clients for determining whether to apply comparison power to the client detection unit and the host detection unit according to whether power is applied to the client. In the bi-directional detector, the client directly detects the host part and manages the connection, thereby reducing the load on the host part, without performing a step by which a host part responds to a connection request of a client.

Abstract: A method for forming channelized groups in a wireless communication network having a plurality of nodes. At least one node in the network is assigned to a first channel that is associated with a channelized group having a first set of nodes. The method determines whether there is contention between the at least one node and the first set of nodes. In addition, the method includes switching the at least one node from the first channel to a second channel based on the contention determination.

Abstract: A supervisory communications system (such as, a headend cable modem termination system) manages communications with a plurality of remote communications devices (such as, a cable modem). The supervisory system enables each of its physical channels to have multiple logical channels, with each logical channel having differing channel parameters or operating characteristics. As a result, different types of communication devices are permitted to coexist on the same physical spectrum. In other words, a communications device using, for example, spread spectrum modulation technologies require different operating characteristics than a communications device using, for example, time division multiplexing technologies.

Abstract: A communication method for facilitating alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby securing a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device connected to a predetermined network is received by an input device. When the output device or a different device has sent an order for setting so that output data of the output device may be inputted to a data input section of the input device, the input device conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device conducts processing of canceling the input setting.

Abstract: A method and system for transferring iSCSI protocol data units (“PDUs”) to a host system is provided. The HBA includes, a direct memory access engine operationally coupled to a pool of small buffers and a pool of large buffers, wherein an incoming PDU size is compared to the size of a small buffer and if the PDU fits in the small buffer, then the PDU is placed in the small buffer. The incoming PDU size is compared to a large buffer size and if the incoming PDU size is less than the large buffer size then the incoming PDU is placed in the large buffer. If the coming PDU size is greater than a large buffer, then the incoming PDU is placed is more than one large buffer and a pointer to a list of large buffers storing the incoming PDU is placed in a small buffer.

Abstract: A system is described having a network, a bus and an interface coupling the network to the bus. A host is coupled to the network and executes software to generate packets for communication on the network. A bus device is coupled to the bus. The interface and host coordinate to transport bus device packets between the host and the bus device via tunneling over the network.

Abstract: The problem is to facilitate alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby secures a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device 1 connected to a predetermined network is received by an input device 2. When the output device or a different device has sent an order for setting so that output data of the output device 1 may be inputted to a data input section 2b of the input device 2, the input device 2 conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device 2 conducts processing of canceling the input setting.

Abstract: This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node.

Abstract: The problem is to facilitate alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby secures a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device 1 connected to a predetermined network is received by an input device 2. When the output device or a different device has sent an order for setting so that output data of the output device 1 may be inputted to a data input section 2b of the input device 2, the input device 2 conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device 2 conducts processing of canceling the input setting.

Abstract: The problem is to facilitate alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby secures a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device 1 connected to a predetermined network is received by an input device 2. When the output device or a different device has sent an order for setting so that output data of the output device 1 may be inputted to a data input section 2b of the input device 2, the input device 2 conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device 2 conducts processing of canceling the input setting.

Abstract: A system for processing data packets comprising a plurality of data processing blocks and a controller, which allows the configuration parameters used in processing the data blocks to be updated in each data processing blocks at the data packet boundary. The present invention involves a system that utilizes a handshaking method for synchronously exchanging data between data processing blocks, wherein the data processing blocks update configuration parameters based on the type of networking standard used. Each data processing block identifies a first data block in the data packet and transmits a first data signal along with a first output data block of the data packet, wherein the block updates the configuration parameters from the controller only when the first data signal is present. In this manner, the first data signal, which is indicative of the data packet boundary, is propagated along the sequence of data processing blocks.

Abstract: In a scheme for processing data chunks, MAC-PHY circuits are adapted to store data chunks of large data packets and to provide same to a shared memory unit across an interface controlled by a controller. A data transfer monitor is adapted to monitor the progress of such data provision and shared layer-two processors perform data chunk processing operations and data packet processing operations based upon such progress. A double data rate (DDR) controller, coupled between the shared memory unit and a DDR memory unit, provides data chunks from the first shared memory unit to the DDR memory unit.

Abstract: The present invention relates to a signal processing system, and proposes the switching operation of device selection which is naturally performed for a user. The signal input device 5 comprises a registration means for registering the signal output devices 3, 4, and an establishment means for, when an establishment request signal requesting the establishment of a signal path is sent from any signal output device 3, 4 out of a plurality of the signal output devices 3, 4, judging whether the signal output device 3, 4, which sent the establishment request signal, is registered in the signal input device 5, and establishing the signal path between the signal output device 3, 4 and the signal input device 5 depending on the judged result, thereby avoiding unnatural operation which is not performed in accordance with user operation, thus making it possible to perform the switching operation of device selection which is naturally performed for a user.

Abstract: A process control system includes a plurality of input/output (I/O) devices and a controller in communication using a bus. Each I/O device has an interface for communicatively linking the I/O device with the bus, and includes a device processor which, upon detection of a potential I/O device fault, severs the communication link provided by the interface with the bus to thereby remove the I/O device from the bus and to prevent the I/O device from keeping other I/O devices on the bus from communicating over the bus.

Abstract: A network device includes a media access control (MAC) device that transmits a first data stream at a first data rate that includes symbols having M bits. A translator converts the first data stream to a second data stream at a second data rate. The translator includes a data appender that appends N bits to the symbols in the first data stream to generate second symbols having M+N bits. A data duplicator duplicates the second symbols X times to produce the second data stream at the second data rate.

Abstract: System and method for partitioning data on a SCDMA cable network use methods of creating data streams to transmit to a head end. Further, the data streams transmitted to the head end are coded with fine granularity scalability features and contain divisions which are assigned codes based on predetermined criteria, so that in the event certain assigned codes are interrupted from service, all appliances along the network can be serviced without interruption.

Abstract: The present invention relates to method and apparatus for reproducing a data stream having a multiple reproduction paths recorded on a high-density optical disk. The present method ensures seamless reproduction of video and audio data of a multi-path data stream by removing possible buffer underrun even when the reproduction path is changed during reproduction.

Abstract: Applications can transparently use a bus, such as the IEEE-1394 serial bus, as if it were an Ethernet (IEEE 802.3). In a conventional Ethernet, each node is assigned a unique 6-byte MAC address in order to receive frames addressed to it over the LAN. According to the invention, IEEE-1394 bus node identifiers are mapped to Ethernet MAC addresses using for example a digital signature algorithm. Ethernet frames are then “wrapped” into 1394 bus packets and addressed to the destination node using the hashed address. The receiver unwraps the 1394 packet and restores the Ethernet frame to its original form. An optimum packet size for transmission of Ethernet packets over the 1394 bus is selected with reference to speed topology maps in the 1394 bus nodes, and this optimum size is transmitted to bus nodes. This packet size is reported to TCP to specify the packet size, and all packets larger than that size are fragmented and reassembled at the receiving node.

Abstract: This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node.

Abstract: In a first aspect, a network processor includes a scheduler in which a scheduling queue is maintained. A last frame is dispatched from a flow queue maintained in the network processor, thereby emptying the flow queue. Data indicative of the size of the dispatched last frame is stored in association with the scheduler. A new frame corresponding to the emptied flow queue is received, and the flow corresponding to the emptied flow queue is attached to the scheduling queue. The flow is attached to the scheduling queue at a distance D from a current pointer for the scheduling queue. The distance D is determined based at least in part on the stored data indicative of the size of the dispatched last frame.

Abstract: The present invention relates to high speed communications, in particular, to an interface device between a transmitting device and a receiving device of a transmission system, wherein the transmitting device is capable of automatic compensation of cross-talk timing errors in the interface device, for a group of signals, by using information stored in a storage attached to that interface device. Preferably, the data stored in said storage comprises data on interconnections between said first and second plurality of terminals and data on crosstalk timing errors in said transmission lines relating to a specific data pattern, for each of said stored interconnection.

Abstract: According to one embodiment of the invention, a system for managing communication in a network line card is provided. The system includes at least two UTOPIA bus controllers. Each UTOPIA bus controller is operable to control a particular one of a plurality of UTOPIA buses. The system also includes at least two sets of UTOPIA physical devices associated with respective ones of the UTOPIA bus controllers. Each set of UTOPIA physical devices is coupled to a respective one of the UTOPIA buses. The system also includes a multiplexer coupled to the UTOPIA bus controllers. The system also includes a same pin coupling each of the UTOPIA buses to the respective UTOPIA bus controllers through the multiplexer.

Abstract: A remote test unit (RTU) and method of operation are provided for utilizes the ability of an access matrix ability to route signals. The RTU can emulate a central Digital Subscriber Line Modem (DSLM-C) for testing customer premises equipment containing a remote Digital Subscriber Line Modem (DSLM-R). The RTU can also emulate a DSLM-R for testing central offices equipment including a digital subscriber line access multiplexer (DSLAM) containing a DSLM-C. The RTU can also emulate a concentrator connected to the DSLAM, a router connected to the concentrator, an Internet service provider (ISP) connected to the router, and a web site connected to the ISP over the Internet. The RTU can further test, using emulation, ISO/OSI layers defined in the ISO/OSI reference model which are connected to the DSLAM.

Abstract: A method of announcing a description of a media session, for example a multimedia conference, that is to take place over multicast capable links is provided in networks configured for Internet Protocol operation. A modular method of announcing media sessions includes: (a) generating a first base module having a first data structure having user oriented data relevant to the media session; (b) generating at least one media module having a second data structure with media oriented data necessary for a user to receive a respective media stream of the media session; (c) providing a link between the first base module and the at least one media module; and, (d) announcing the media session by making at least the first base module available to potential recipients of the media session.

Abstract: A method for forming a network is disclosed with the network including a plurality of communication devices, a wire network for allowing a plurality of communication transmissions between the communications devices, and at least one connectivity device connected to the wire network,. The method includes utilizing the connectivity device to bring segments of the wire network together such that the communication devices are interconnected, utilizing the connectivity device to provide communication transmissions to the communications devices with independent paths through the wire network such that communication collisions are reduced, utilizing the connectivity device to regenerate a communication signal such that the distance between the communications device is extended, and utilizing the connectivity device to route communication transmissions by the communications devices through the wire network.

Abstract: A network interface is presented that receives packet data from a shared medium and accomplishes the signal processing required to convert the data packet to host computer formatted data separately from receiving the data packet. The network interface receives the data packet, converts the analog signal to a digitized signal, and stores the resulting sample packet in a storage queue. An off-line processor, which may be the host computer itself, performs the signal processing required to interpret the sample packet. In transmission, the off-line process converts host-formatted data to a digitized version of a transmission data packet and stores that in a transmission queue. A transmitter converts the transmission data packet format and transmits the data to the shared medium.

Abstract: A USB system is capable of connecting, based on the function of constructing and connecting a virtual port by a virtual port constructing functional unit, a number of devices exceeding a prescribed number of tiers having a hub device in a connection topology of a host device—hub devices—a device of the USB system. When the host device addresses a device on its downstream side, the hub device acts as if it is a specified device by a proxy response functional unit including the hub device, and instantaneously performs a proxy response depending upon the situation that, for example, the device on its downstream side is not ready. This causes no problem associated with the turn-around time of the USB bus even if the prescribed number of tiers is exceeded.

Abstract: A single shelf network system capable of providing expansion to a multiple shelf mode is described. In one embodiment, slots are provided in a single shelf network system that are capable of accepting either I/O cards or expansion cards. When such a single shelf network system is to be operated in a single shelf mode, such slots may be provided with I/O cards to maximize the data transport capability of the single shelf network system. However, to expand the single shelf network system to function as a multiple shelf network system, the slots are provided with expansion cards. The expansion cards serve to couple a control card of the single shelf network system to one or more expansion shelves, thereby allowing the control card to exert control over the one or more expansion shelves. Since a single expansion card can support multiple expansion shelves, the number of slots of the single shelf network system needed to support expansion does not increase as additional expansion shelves are added.

Abstract: This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node.

Abstract: A first frame of carrier data can be communicated between a first carrier interface of a first radio base station node and a mobile switching center over a first carrier bus. In addition, a first frame of bus data can be communicated having a first number of dedicated control timeslots at a first bus interface of the first radio base station node over a first radio base station bus. Furthermore, a second frame of carrier data can be communicated between a second carrier interface of a second radio base station node and the mobile switching center over a second carrier bus. Finally, a second frame of bus data having a second number of dedicated control timeslots, different from the first number of dedicated control timeslots, can be communicated at a second bus interface of the second radio base station node over a second radio base station bus.

Abstract: The problem is to facilitate alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby secures a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device 1 connected to a predetermined network is received by an input device 2. When the output device or a different device has sent an order for setting so that output data of the output device 1 may be inputted to a data input section 2b of the input device 2, the input device 2 conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device 2 conducts processing of canceling the input setting.

Abstract: An information transport system includes a switching fabric that transfers information between network modules and between a host processor and the network modules. The switching fabric includes network module interfaces each associated with one or more network modules. The network module interfaces communicate with each other over a peer transaction bus to allow information to be transferred from one network module to another network module. The switching fabric also includes a processor interface associated with the host processor. The processor interface communicates with the network module interfaces over a host transaction bus to allow information transfer between the host processor and each network module. The peer transaction bus and the host transaction bus separately support routed packet data and peer to peer data transactions in order to prevent one type of transaction from blocking the other and avoid performance dependencies.

Abstract: A system and method selectively establishes data communications, such as XDSL services, between data devices and a network switch. Status of the data devices are monitored and active data devices are connected to a data branch for data communications. Data devices which are inactive may remain connected to the data branch, if available, or may be switched to a pilot branch. While disconnected from the pilot branch, the system may detect a signal from the data device indicating that the device is going active. If pilot signals are being used, the pilot signals between a data device and the network switch are monitored to determine when the data device is going active. Once detected, the data device is connected to the data branch. Alternately, if pilot signals are not being used, the system monitors the connection with the data device for any signals, such as a wake-up signal, which indicates that the data device is going active.

Abstract: The present invention relates to a high-speed digital transmission method using an analog subscriber line (for example, an existing telephone-use copper cable), a subscriber accommodating system used in the high-speed digital transmission method, an accommodating device on a subscriber-terminal side and an accommodating device on an accommodating station side. The present invention includes the steps of providing a subscriber distributing device, to which a plurality of subscribers are connected, on a subscriber-terminal side of an analog subscriber line in a high-speed digital transmission method using the analog subscriber line; setting a low-frequency band part as a control channel; setting a high-frequency band part as one or a plurality of communication channels; and controlling the one or plurality of communication channels by use of the control channel. The plurality of subscribers communicate by using the same analog subscriber line.

Abstract: Systems and method for switching packets of information between ports are provided. One system comprises a plurality of port processors, a switch fabric and a scheduler. The port processors send packet headers to the scheduler, which resolves contentions between packet headers with the same destination port addresses. The scheduler sends request-grant information to the port processors. The port processors send packets as specified by the request-grant information to the switch fabric. The switch fabric transfers the packets between the port processors according to the destination port addresses of the packets.

Abstract: A transmission source bridge collects packets sent from nodes connected to a serial bus in accordance the IEEE1394 Standards, into one packet in an order they are to be transmitted and then sends them onto an ATM network, so that a transmission destination bridge receives this packet and divides it into a plurality of smaller packets and transfers them, in the order they were sent, to nodes connected to the serial bus in accordance with the IEEE1394 Standards.

Abstract: An apparatus for an asymmetric data connection comprises a head end router which may be coupled to an ATM PVC, a PSTN modem coupled to the head end router, a plurality of downstream routers each couplable to the ATM PVC via respective ATM interfaces, and a plurality of downstream PSTN modems each coupled to a respective downstream router via a respective serial interface. Each ATM interface of each respective downstream router is allocated, in use, a respective IP address in a single subnet. Each serial interface of each respective downstream router is allocated in use, a respective IP address in a single subnet. A method of establishing an asymmetric data connection is also described.

Abstract: In the 1394 communication, communication at a data rate of S100, S200, S400, S800, S1600, S3200 or at a faster speed in the future can be performed. When the 1394 communication is performed with an optical-fiber cable and a UTP cable, it is possible to cope with high-speed communication by arranging bits being not used at a low speed, on a data stream. Transmission of data rates is realized by sending speed-control symbols at a predetermined speed. As for a Tp bias signal, an equivalent object is achieved by sending predetermined control symbols.

Abstract: In a data multiplexing apparatus, a single external memory stores different kinds of transfer data. A header cache memory stores the system header and the header data, and a plurality of data cache memories stores the transfer data. The cache memories are connected via an internal bus to the external memory. A data input circuit sequentially fetches the transfer data from the external memory on a time division basis, so that the transfer data is stored in one of the data cache memories. Also, a system clock signal generation circuit constantly generates a system clock signal indicating the current time. A selector circuit sequentially selects the cache memories and generates a system stream formed by the system header, the header data and the transfer data. In this case, the selector circuit further selects the system clock generation circuit to input the system clock signal to a predetermined position of the system header.

Abstract: An apparatus for driver power and size selection includes in one embodiment a controller for controlling the enabling and disabling of legs in a legged driver, the legged driver providing only that amount of power necessary to transfer a data packet from its current location to its destination location. A method of forwarding data packets includes determining the distance between a current location of a data packet and the destination location of the data packet, and enabling as many legs of a legged driver as are necessary to power the transfer of the data packet to its destination.

Abstract: An apparatus comprising an input capable of receiving a bandwidth optimized transport stream is provided. The bandwidth optimized transport stream can be produced by receiving a transport stream of variably compressed program data bearing transport packets and one or more null transport packets. One or more of the null transport packets is selectively replaced with another to-be-remultiplexed non-null data bearing transport packet. Independently of determining an amount of information carried by a program data bearing transport packets from time to time in the received transport stream, at least one selected program bearing transport packet is scheduled for output in an output remultiplexed bitstream.

Abstract: A device that automatically configures the high speed (100 Mbps) port of a switch both physically and logically is provided. For physical configuration, the device determines the transmit pair conductor and the receive pair conductor interconnecting a switch port and Data Terminal Equipment (DTE). The switch port can be termed “Primary” while the connected DTE is termed “Secondary” or vice versa. For logical configurations, the device makes the determination. The device includes a switching relay, a controller and impedance matching transformers. The controller switches the connections between the relay and the transformer so that the impedance is substantially constant even though the output from the high speed port is feeding different resistive transmission lines.

Abstract: A method of half duplex transmission of a packetized digital data includes the steps of inputting a new packet to be transmitted to a first-in-first-out storage, determining whether the new packet contains time information related to synchronization with other electronic device, responsive to the determination that the new packet contains time information, updating a local timer of the electronic device with a prescribed value, continuously incrementing the local timer, responsive to a timing enabling transmission of the new packet by the transmitting/receiving unit of the electronic device, reading the new packet from the first-in-first-out storage, determining whether the new packet contains time information or not, changing the time information by using a value of the local timer to prevent mismatch in synchronization with other electronic device, and outputting to the bus through the transmitting/receiving unit.

Abstract: A bidirectional telephone communication system for supporting a multiplicity of subscriber lines between a downstream distribution terminal using only two of a multiplicity of pre-existing transmission line pairs connected between an upstream distribution terminal and a downstream distribution terminal. Said system including automatic initializing and monitoring circuitry for powering up a communication link and reestablishing the link if lost.

Abstract: The present invention relates in general to communication networks. In particular, the invention relates to a communication network in which nodes communicate via radio connections employing Ethernet protocol in a ring configuration which provides for fault tolerance and prevention of infinite communication loops. In a preferred embodiment, the network is in a ring configuration and comprises two routers for enabling fault tolerance in the event of a malfunctioning communication link and for preventing infinite message forwarding around the ring network. VLANS may be beneficially employed to assist with rerouting of data communication traffic in the event of a communication link failure and to aid in isolating customer network data from unauthorized viewing.

Abstract: This invention enables the digital broadcast receiving section to restore the reception timing even in a system incapable of guaranteeing the real-time feature of digital broadcast data as far as the 1394 Link. The digital broadcast signal received by the RF section and tuner section is restored to ATM cells at the packeting section. The ATM cells are then sent to the time stamp adding section, which adds the arrival time to the ATM cells. The CPU extracts, as a time stamp, the arrival time of the first ATM cell in each transport packet and creates a 4-byte source packet header on the basis of the value of the arrival time and the value of the CTR in the 1394 Link.

Abstract: A SONET network interface for interconnecting at least one high speed unit (HSU) with at least two low speed interface units (LSUs) to enable transmission of signals therebetween. The interface having: a common bus of predetermined bit width for interfacing the HSU unit with each of the LSU units to enable transmission of signals from each of the LSUs to the HSU, and reception of the signals from the HSU to each of the LSUs; a first partition bus of the predetermined bit width for interfacing the HSU to a predetermined number of the LSUs, the first partition bus being partitioned into a first bus for interfacing the HSU to a first subset of the LSUs and a second bus for interfacing the HSU to a second subset of the LSUs; and a second partition bus of the predetermined bit width for interfacing the HSU to a predetermined number of the LSU units.

Abstract: The invention deals with a wireless extension of the IEEE 1394 bus. Considered is a scenario where two clusters of 1394 devices are linked to each other by means of a wireless bridge (9). The devices of one cluster shall communicate with devices of the other cluster without being bridge-aware. The wireless bridge, however, provides for a bus reset isolation. This causes a problem each time a bus reset occurs in one of the clusters. To solve this problem it is proposed to implement a buffer memory (22) for self-identification packets in the 1394 interfaces (11) of both boxes of said wireless bridge (9). In particular these buffer memories (22) shall be implemented in the physical layer section (21) of the 1394 interfaces (11).