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Method and device for configuring packet data unit in MAC layer

A technology of grouping data units and data units, which is applied to electrical components, transmission systems, etc., can solve problems such as the confusion of padding sub-head positions, and achieve the effect of avoiding inconsistency and reducing complexity

Active Publication Date: 2010-06-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The position of the padding sub-header inserted in the current specification is confusing, which will cause additional complexity in the implementation process

Method used

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  • Method and device for configuring packet data unit in MAC layer
  • Method and device for configuring packet data unit in MAC layer
  • Method and device for configuring packet data unit in MAC layer

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Embodiment Construction

[0047] There are two reasons for the inconsistency of padding sub-header configuration positions in the prior art:

[0048] 1) When the MAC PDU specification was formulated in the early days, it was considered that there might be MAC CEs of variable length. The format of the MAC CE subheader corresponding to the variable length MAC CE is the same as that of the MAC SDU subheader, and affects the position of the special padding subheader.

[0049] 2) The protocol stipulates that except for the special padding sub-header, each MAC sub-header corresponds to a part of the payload, and the regular padding sub-header located at the end of the MAC sub-header needs to correspond to the last padding part of the MAC PDU.

[0050] However, according to the development of the protocol, the current MAC CEs are all fixed-length. Moreover, according to the analysis of the function of MACCE, as a control unit, MAC CE needs to have a fixed format in order to achieve a good control effect, so e...

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Abstract

The invention discloses a method for configuring a Packet Data Unit (PDU) in a Media Access Control (MAC) layer. The method comprises the following steps of: configuring effective load of MAC PDU and an MAC sub-head corresponding to the effective load, wherein the effective load comprises an MAC Control Element (CE) and / or an MAC Service Data Unit (SDU); judging whether the effective load of the MAC PDU is only configured with the MAC CE and the MAC PDU needs filling of 1 byte, if so, configuring a filling sub-head behind a last MAC CE sub-head and adjacent to the last MAC CE sub-head; otherwise performing an MAC PDU configuring process in the prior art. The invention also discloses another method for configuring the MAC PDU and a device for configuring the MAC PDU. The scheme of the invention avoids the inconsistency of a configuring position of the filling sub-head under different conditions in the existing specification.

Description

technical field [0001] The present invention relates to the technical field of mobile communication media access control, in particular to a method and device for configuring a packet data unit (PDU) of a media access control (MAC) layer. Background technique [0002] In the current specification, the MAC PDU consists of two parts: a MAC header and a payload. The payload consists of zero or at least one MAC service data unit (MAC SDU), zero or at least one MAC control element (MAC CE) and Padding composition. Such as figure 1 shown. Wherein, the sizes of the MAC header and the MAC SDU are variable. The size of the MAC header is determined by the number of MAC CEs carried by the MAC PDU, the number of MAC SDUs, and the configuration position of padding. The size of the MAC SDU is determined by the data volume of each radio bearer that needs to be carried. [0003] The padding size is calculated by the following formula: [0004] Required Padding = length of MAC PDU - le...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
Inventor 赵毅谌丽许芳丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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