Transmission of multiplex protocol data units in physical layer packets

A protocol data unit, multiplexing technology, applied in the field of communication, can solve the problem of multiplexing protocol data unit loss and other problems

Inactive Publication Date: 2008-10-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Normally, all multiplex protocol data units carried in said erased physical layer packets are also lost

Method used

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  • Transmission of multiplex protocol data units in physical layer packets
  • Transmission of multiplex protocol data units in physical layer packets
  • Transmission of multiplex protocol data units in physical layer packets

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs.

[0019] figure 1 A block diagram showing the processing and multiplexing at the transmitter for a video telephony call using ITU-T Recommendation H.324M (or simply "H.324M"). H.324M is a modified version of H.324 recommended by ITU-T, and its name is "Terminal for Low Bit Rate Multimedia Communication (Terminal for Low Bit Rate Multimedia Communication)". H.324 is an international standard for multimedia communication over low bit rate circuit conversion systems, and uses H.223 as a data transfer / multiplexing protocol.

[0020] At the application layer 110, the video telephony call is processed as separate video, audio, data and control signals sent on different logical channels. The data can be used for text or some o...

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Abstract

A transmitter generates MUX-PDUs for video, audio, data, and / or control streams based on a fixed PHY packet size such that all or a substantial percentage of the MUX-PDUs conform to the PHY packet size. The MUX-PDUs have variable sizes and are mapped to PHY packets such that (1) each MUX-PDU that is smaller than the PHY packet size is sent in one PHY packet and (2) each MUX-PDU that is larger than the PHY packet size is sent in a minimum number of PHY packets. Each MUX-PDU is padded with one or more null MUX-PDUs and / or one or more padding bytes, if needed, to obtain the PHY packet size. Each PHY packet is sent in one transmission time interval (TTI) to a receiver. The receiver performs the complementary processing on the received PHY packets to recover the MUX-PDUs. The receiver forwards each valid MUX-PDU and discards any padding.

Description

technical field [0001] This disclosure relates generally to communications, and more particularly to techniques for transmitting and receiving Multiplex Protocol Data Units (MUX-PDUs) in wireless communications systems. Background technique [0002] Wireless communication systems are widely deployed to provide various communication services such as voice, video, packet data, and so on. These systems may be multiple-access systems capable of providing communication for multiple users by sharing available system resources (eg, system bandwidth and / or transmit power). Examples of these multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems. [0003] Video telephony or video calling is a rapidly growing application for many wireless communication systems. Video telephony applications use, for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04L12/00H04L47/431
CPCH04N21/4381H04N7/148H04N21/4363H04N21/4348H04N21/4341H04L29/06027H04L29/0651H04N21/2368H04L29/06523H04N21/23614H04N21/2381H04N21/23611H04L65/607H04L29/0604H04L65/80H04L69/04H04L65/70H04B15/00H04L65/1101
Inventor 凌凡
Owner QUALCOMM INC
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