摘要:
A method and a system for medium access control among devices in a communication system is provided. One implementation involves selecting a contention-based control period for access to a shared communication medium; dividing the contention-based control period into multiple time slots, wherein each slot has a duration that is a function of one or more of the duration of transmission of a request to send (RTS) frame, the duration of transmission of a clear to send (CTS) frame, and an inter frame space (IFS) duration therebetween; and transmitting an RTS frame in a selected slot for allocating a reservation period for accessing the medium for data transmission.
摘要:
Method and system for transmission of uncompressed video information from a sender to a receiver over wireless channels are disclosed. For example, according to one embodiment, when channel conditions (e.g., noise or interference) worsens, one or more least significant bits (LSB) of pixel data are not transmitted to save bandwidth for more efficient transmission. Furthermore, the remaining one or more of the most significant bits (MSB) of the pixel data are transmitted with coding and/or modulation schemes that provides extra error protection, relative to what is needed in regular channel conditions.
摘要:
A system and method for wireless communication is disclosed. In one aspect, the method comprises generating a physical (PHY) frame comprising a PRY layer header and a PHY payload data packet, wherein the PHY layer header comprises an aggregation indication bit for indicating whether the PHY payload data packet comprises two or more sub-packets received from the application layer. The method further comprises transmitting the PHY frame.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A method and system for transmitting uncompressed video over a wireless channel by inputting a frame of pixel information, partitioning spatially correlated pixels into different packets, and transmitting the packets separately over a wireless channel. For robust transmission, error detection data can be generated for each packet and appended to each packet before transmission. A receiver receives the transmitted packets and checks if a received packet is corrupt based on the appended error detection data. For a corrupt packet, the receiver corrects the corrupt pixels using pixel information in other received packets containing neighboring pixels to recover each corrupt pixel in the corrupt packet.
摘要:
A method and a system for medium access control among devices in a communication system is provided. One implementation involves selecting a contention-based control period for access to a shared communication medium; dividing the contention-based control period into multiple time slots, wherein each slot has a duration that is a function of one or more of the duration of transmission of a request to send (RTS) frame, the duration of transmission of a clear to send (CTS) frame, and an inter frame space (IFS) duration therebetween; and transmitting an RTS frame in a selected slot for allocating a reservation period for accessing the medium for data transmission.