Abstract: A system and method for wireless communication of uncompressed audiovisual data are disclosed. One embodiment of the system includes a first device and a second device wirelessly connectable to each other. The first device is configured to transmit a connection control information request from the first device to the second device, wherein the connection control information request includes a request for connection control information of the second device. The connection control information includes at least one of association information, wireless video area network (WVAN) information, device capability information, audio video (A/V) format capability information, bandwidth information, A/V stream start, stop or pause command information, and device control information. The request further includes connection control information of the first device. The second device is configured to transmit a connection control information response from the second device to the first device.

Abstract: An apparatus and method for achieving power saving for a portable device in a wireless network for transmitting audio/video (A/V) data is disclosed. An optimal transmit power level is selected by transmitting multiple probe messages by a portable device at increasing transmit power levels until a response to one of the probe messages is received within a preset allowed response time. A relay node is selected by a portable device for receiving compressed A/V data, uncompressing the compressed A/V data, and transmitting the uncompressed A/V data to an intended receiver.

Abstract: A method of efficient scheduling for portable devices communicating with a coordinator over a network is disclosed. The method includes: listening for beacons broadcasted by a coordinator; assigning, by the coordinator, a single contiguous time block (CTB) for portable devices during a superframe defined by consecutive beacons; scheduling a single wake period of one of the portable devices, which overlaps inclusively with consecutive beacons and the single CTB; and minimizing duration of the single wake period of the portable device. The single CTB may be arranged next to one of the consecutive beacons. The method may further comprise assigning, by the coordinator, a single random access time block (RATB) for the one of the portable devices so as to overlap with the single wake period. The RATB may be arranged next to one of consecutive beacons. The CTB may be arranged next to the RATB. The CTB may be arranged next to one of the consecutive beacons.

Abstract: A method and system for device discovery in a wireless network is provided. The device discovery involves directionally transmitting a data unit from a transmitting station over a channel in different directions to emulate omni-directional transmission, receiving the data unit transmissions from different directions at a receiving station, determining the quality of the transmissions received from the different directions, and detecting location information for the transmitting station relative to the receiving station based on the highest quality transmission among the transmissions received from the different directions.

Abstract: A wireless communication system and method for wireless communication are disclosed. One embodiment of the system includes a wireless communication device. The device includes a receiver configured to receive a data packet via a channel. The device further includes a transmitter configured to send an acknowledgment (ACK) signal via a low-rate channel upon receiving the data packet. The low-rate channel has a directional mode and an omni-directional mode. The acknowledgment signal includes a low-rate physical layer (LRP) preamble and an acknowledgment (ACK) header including a mode index field. The mode index field includes a plurality of bits indicative of whether the ACK signal is transmitted using the directional mode or the omni-directional mode.

Abstract: A data structure of a MAC header for a WirelessHD communication system including an application layer, a media access controller (MAC) layer, and a physical (PHY) layer, includes, a payload data packet from the application layer; a MAC header of a fixed length; a MAC header extension of a variable length; a MAC header extension control field which signals if a particular field needs to be included or excluded; a PHY header for synchronizing the behavior of the PHY layer; a first CRC segment for a cyclic redundancy checksum for checking transmission of the MAC header and the PHY header; and a second CRC segment for a cyclic redundancy checksum for checking transmission of the MAC header extension. Either the MAC header or the MAC header extension includes a size indication of the MAC header extension for facilitating checking of the second CRC segment.

Abstract: A system and method for wireless communication of uncompressed video data are disclosed. One embodiment of the system includes a wireless communication device. The device includes a receiver configured to receive a data packet, and a transmitter configured to send an acknowledgment (ACK) signal upon receiving a data packet. The ACK signal includes a physical layer preamble, a physical layer header including a plurality of bits indicative of the status of the data packet, and a cyclic redundancy check (CRC) field. The ACK signal optionally includes a payload field containing beam-tracking data.

Abstract: A method and a system for transmitting uncompressed video over a communication medium such as wireless channel, is provided. For each pixel of video information, at least one portion of the pixel information is encrypted to generate encrypted data, and then the encrypted data is encoded for transmission error recovery. The encrypted and encoded data along with the remaining portion of the pixel information is transmitted over the communication medium.

Abstract: A system and method for efficiently communicating messages over a low-rate channel between multiple devices in a system for wireless communication of uncompressed video is disclosed. The method includes using multiple destination aggregation to improve the efficiency of the low-rate channel, thereby allowing more time to utilize a time division duplexed high-rate channel for communicating the uncompressed video. The multiple destination aggregation messages can be encoded by any device in the system and received over the low-rate channel by any other device in the system. Receiving devices can determine if any of the multiple messages received over the low rate channel are targeted to the receiving device and subsequently process these messages.

Abstract: A system and method for performing medium access control in a system for wireless communication of uncompressed video is disclosed. In one aspect, the method includes communicating a control initiation request message during a contention based period of a superframe period. The control initiation request message contains information allowing a device coordinator to determine a reserved time slot for communication of the requested message exchange. The requested message exchange is then performed in a non-contentious environment, thereby limiting collisions of contention based messages. The control initiation procedure and subsequent message exchanges take place on a low-rate channel. Transmission on the low-rate channel is time division duplexed with a high-rate channel, where transmission at any one time can take place on either the high-rate or the low-rate channel.

Abstract: A method and system for communicating information over a wireless channel in a communication system including a coordinator and receivers, involves controlling channel access by dividing a contention-free period (CFP) into one or more schedules, wherein each schedule includes one or more periodical channel time blocks (CTBs) for wireless communication, reserving a CTB for reliable broadcast or multicast (ReBoM) communication of a data packet over the channel, transmitting the data packet from the coordinator over the channel during the reserved CTB, and receiving one or more acknowledgments for the data packet from one or more of the receivers. The data packet includes a header comprising ReBoM information indicating a multi-CTB ReBoM communication sequence for the data packet or a single-CTB ReBoM communication sequence for the data packet.

Abstract: A method and system for establishing a subnet in a wireless network is provided for wireless transmission of information between two stations in the network. A subnet access process in a wireless communication system establishes a subnet comprising a direct wireless link on a secondary frequency channel for wireless transmission of data between two stations.

Abstract: A method and system for establishing a channel in a wireless video area network, is provided. Establishing a channel involves scanning available high-rate and low-rate channels, selecting a channel from the available channels with minimal interference with other networks, determining if the selected channel remains available for a listening period, and if the selected channel remains available, then starting communication on the selected channel. The selected channel is a high-rate channel and a corresponding low-rate channel.

Abstract: A channel time allocation and access control process for communication in wireless networks is provided. The channel time is divided into channel time blocks (CTBs), including one or more reserved CTBs and one or more unreserved CTBs. Schedules are implemented, wherein one or more periodic, equal-sized CTBs are reserved for isochronous streams. Dynamic CTB extension and truncation allow flexible channel time allocation.

Abstract: A method and system for transmitting video information from a sender to a receiver over a wireless channel, is provided. Video information bits are placed into multiple data packets, and transmitted in a burst sequence from a sender to a receiver over a wireless channel in a first time frame. Transmission of each data packet is separated from transmission of the next data packet by an inter-frame time period which is shortened by a channel switching duration. Then, selected video information bits are retransmitted to from the sender to the receiver in a second time frame.

Abstract: A method and system is provided for transmission of video information pixels over wireless channels, where each video pixel includes a plurality of components and each component comprises video information bits. The information bites are logically grouped into multiple logical groups in a packet, and error detection information is determined for each logical group. The error detection information is placed in the packet, and the packet is transmitted from a transmitter to a receiver over a wireless channel.

Abstract: A method and system for transmitting video information from a sender to a receiver over wireless channels, by inputting a frame of video information at the sender, packetizing the video information and transmitting the video packet from the sender to the receiver over a wireless channel. Packetizing the video information is performed by segmenting the frame into one or more segments of video information, constructing a data payload from one of the segments, constructing a video header including information describing said one segment, forming a video packet from the video header and the data payload. The video header in each video packet uniquely defines the video information in the data payload of the video packet for the receiver to reconstruct the video frame for proper display of the data payload in a video stream.

Abstract: A method and system for transmitting video information from a sender to a receiver over a wireless channel is provided. Video information bits are placed into one or more data packets at the sender, and each data packet is transmitted from the sender to the receiver over a wireless channel during a current time frame. For each transmitted data packet, the sender receives a corresponding acknowledgment packet from the receiver. The sender then performs burst retransmission of the negatively acknowledged packets during a next time frame comprising a BeamTrack Group for transmission of further data packets from the sender to the receiver over a wireless channel. The receiver utilizes each retransmitted data packet to recover a lost or erroneously received data packet.

Abstract: A method and system for channel access control for transmission of uncompressed video information over wireless channels. A contention-free period (CFP) for high-rate and low-rate channels is divided into schedules in which one or multiple periodical channel time blocks are reserved for wireless transmission of isochronous streams.

Abstract: A method and system for enhancing transmission reliability of video information over a wireless channel is provided. The video information includes pixels, each having a plurality of components and each component including video information bits that are placed in sub-packets within a packet. Error detection information is determined for one or more sub-packets, and placed in the packet. Then the packet is transmitted from a transmitter to a receiver a wireless channel, wherein the receiver uses the error detection information per sub-packet to check for transmission errors and request retransmission of erroneous video information bits based on their perceptual importance.