Method for implementing protocol data unit of wireless links control layer

A wireless link control and protocol data unit technology, applied in the field of realization of wireless link control layer protocol data unit, to achieve the effect of improving wireless resource utilization efficiency, low overhead, and good backward compatibility

Inactive Publication Date: 2008-07-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Regarding the variable-length radio link control layer protocol data unit scheme in the improvement of the radio interface layer 2 of the high-speed packet access HSPA evolution project, the current problems to be solved include: how to realize the maximum length limit of the protocol data unit? Does it support concatenation of service data units? How is the frame structure of the protocol data unit defined?

Method used

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  • Method for implementing protocol data unit of wireless links control layer
  • Method for implementing protocol data unit of wireless links control layer
  • Method for implementing protocol data unit of wireless links control layer

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0084] Example 1 is the case where the radio link control layer supports a complete service data unit RLC SDU plus header information to generate a protocol data unit RLC PDU.

[0085] It can be configured by default or by configuring the maximum RLC PDU length to be the sum of the maximum RLC SDU length plus the length of the header information L max_SDU_header to determine the L max_PDU . Or, you can configure the maximum RLC PDU length to be less than the sum of the maximum RLC SDU length plus the length of the header information L max_SDU_header to determine a certain value for the L max_PDU .

[0086] When the sum of the length of the radio link control layer service data unit RLC SDU plus the length of the header information L SDU_header not greater than the L max_PDU In this case, a complete service data unit RLC SDU is added with header information to generate a protocol data unit RLC PDU, and a value of the header extension field HE in the header information is u...

example 2

[0094] Example 2 is the case where the radio link control layer supports segmenting the RLC SDU and adding header information to generate a protocol data unit RLC PDU.

[0095] Such as Figure 5 As shown, when the length of the RLC SDU plus the length of the header information L SDU_header Greater than the maximum RLC PDU length limit L max_PDU , add header information to the RLC SDU segment to generate a protocol data unit RLC PDU. Add header information to each segment of an RLC SDU to generate a separate RLC PDU; or when RLC is configured to support concatenation, it can also be concatenated with other RLC SDUs to generate an RLC PDU.

[0096] The frame structure of the RLC PDU generated by segmentation is as follows Image 6 As shown, the definitions of each field of the header information except HE are the same as those in the background technology figure 2 The description of HE is consistent with that shown in Table 1. When the RLC is configured not to support the ...

example 3

[0099] Example 3 is that the radio link control layer can determine whether to support concatenation of RLC SDUs and add header information to generate a protocol data unit RLC PDU through configuration, and the configuration supports concatenation.

[0100] Configurable preset length L 1 , only for not greater than the preset length L 1 The RLC SDUs are concatenated, and the header information is added to the RLC SDUs after concatenation to generate a protocol data unit RLC PDU; usually the concatenation method is suitable for RLC SDUs with a small length. The preset length L 1 It can be configured to include the length after the header information or not include the length of the header information; at the same time, the preset total length L can also be configured 2 , it is required that the sum of the lengths of multiple RLC SDUs concatenated is still not greater than the preset sum length L 2 ;Preset sum length L 2 Can be configured to include the length after the hea...

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Abstract

The present invention discloses a realization method for wireless link control layer protocol data unit. The length limit of a configured wireless link control layer protocol data unit RLC PDU is Lmax_PDU. When the sum LSDU_header of the length of a wireless link control layer service data unit RLC PDU and the length of header information is not greater than the Lmax_PDU, the header information is added to an integral RLC SDU for generating an RLC PDU, a value of an HE field in the header information is used to indicate the next field as the content of an integral RLC SDU. When the sum LSDU_header of the length of the RLC SDU length and the header information length is greater than the Lmax_PDU, the integral RLC SDU is segmented and then added to the header information for generating the RLC PDU, and the value of a header extended field HE in the header information is used to indicate the next field information. The present invention decides whether to support that the RLC PDU is generated with the integral and / or segmented RLC SDU in a serial connection mode or not through configuration.

Description

technical field [0001] The invention relates to a method for realizing the protocol data unit of the radio link control layer in a wireless communication system, in particular to a method for realizing the protocol data unit of the radio link control layer suitable for high data rate packet services. Background technique [0002] In the radio link control layer of the radio access network RAN ​​of the third-generation mobile communication wideband code division multiple access WCDMA system, the protocol data unit RLC PDU on the corresponding radio bearer is a preset fixed length, which is the radio link control layer. The layer service data unit RLC SDU is generated after performing segmentation / concatenation / filling processing according to the preset length and adding corresponding header information. [0003] Existing methods for generating a radio link control layer protocol data unit RLC PDU, such as figure 1 Shown: [0004] If the length of a service data unit SDU exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08
Inventor 张健阮象华周晓星
Owner ZTE CORP
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