Method for constructing protocol data unit (PDU) of media access layer (MAC layer) of wireless communication system

A wireless communication system, protocol data unit technology, applied in wireless communication, transmission system, digital transmission system, etc., can solve problems affecting sub-header analysis, control information unit cannot be restored, and reduce system throughput, so as to avoid errors Effects of Diffusion, Diffusion to Avoid Errors, and Complexity Reduction

Active Publication Date: 2015-04-29
北京久华信信息技术有限公司
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Problems solved by technology

And because of the existence of bit errors, it will lead to the spread of errors, which greatly reduces the system throughput and wastes precious air interface resources
Taking the LTE system as an example, the construction method of the MAC layer PDU is as follows: figure 1 As shown, each sub-header in the MAC header corresponds to a MAC Control element, MAC SDU or padding in the MAC payload in turn. When the "E" field in the sub-header (used to indicate whether there are subsequent header), the "L" field (used to indicate the byte length of the corresponding MAC Control element or MAC SDU of the MAC payload) or the "F" field (used to describe the length of the "L" field) has an error, which will affect the current and subsequent sub The analysis of the -header causes subsequent cascaded MAC SDUs or control information units to be unrecoverable (demultiplexed), resulting in the spread of errors

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  • Method for constructing protocol data unit (PDU) of media access layer (MAC layer) of wireless communication system
  • Method for constructing protocol data unit (PDU) of media access layer (MAC layer) of wireless communication system
  • Method for constructing protocol data unit (PDU) of media access layer (MAC layer) of wireless communication system

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Embodiment Construction

[0052] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0053] Such as figure 2 As shown, a method for constructing a MAC layer protocol data unit PDU in a wireless communication system includes: segmenting the MAC PDU, that is, segmenting one MAC PDU into multiple MAC Sub-PDUs, wherein one MAC Sub- PDU includes 4 parts: N bit synchronization code, MAC header, MAC Payload, and K bit cyclic redundancy check code CRC. 0 =Y, where Y>=K+N), the number of segmented MAC Sub-PDUs is i (initially, i=0), the number of MAC Sub-Payloads to be concatenated is M, and the lengths are respectively for {L 0 , L 1 ,...,L M-1} (unit is bit), the number of corresponding MAC Sub-Headers is also M, and the length is {H 0 , H 1 ,...,H M-1} (unit is bit), each MAC Sub-PDU can cascade up to Z MAC Sub-Payloads (0i (Initially, X 0 =0), the current MAC Sub-PDU concatenation does not include the number of MAC Sub-Payload...

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Abstract

The invention relates to a method for constructing a protocol data unit (PDU) of a media access layer (MAC layer) of a wireless communication system. The method comprises the following steps: constructing an MAC PDU in different sections, wherein one MAC Sub-PDU comprises four parts, that is, a synchronous code of N bit, an MAC head, an MAC Payload and a cyclic redundancy check code (CRC) of K bit. The invention further relates to an SDU (Service Data Unit) on the MAC layer and control information unit recovery method. By adopting the method, the throughput rate of the system is increased, and the precious shortage resource is saved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for constructing a protocol data unit (PDU) of a medium access layer (MAC layer) in a wireless communication system, a MAC layer service data unit (SDU) and a MAC layer control information unit after demultiplexing at a receiving end (Control Element) recovery method. Background technique [0002] Due to the particularity of the propagation environment, the physical layer of the wireless communication system often generates bit errors during transmission. And because of the existence of bit errors, it will lead to the spread of errors, which greatly reduces the system throughput and wastes precious air interface resources. Taking the LTE system as an example, the construction method of the MAC layer PDU is as follows: figure 1 As shown, each sub-header in the MAC header corresponds to a MAC Control element, MAC SDU or padding in the MAC payload in turn. Wh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W28/06
Inventor 高子龙肖旭孟浩朱世章王永辉尚宏伟张明
Owner 北京久华信信息技术有限公司
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