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Method and access network for indicating reverse CDMA section in TDD system

A time division duplex, access network technology, applied in the access network field, can solve the problem of not giving the distribution of the reverse CDMA segment of the UMBFDD system, etc.

Inactive Publication Date: 2009-02-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that in the UMB TDD system, the scheme of setting the length of "CDMAInterlacesBitmap" to be equal to the interleaving length used in the UMB FDD system cannot be directly used to indicate the distribution of reverse CDMA segments to the AT, and in the prior art In the UMB FDD system, there is no technical solution for how the AN indicates the reverse CDMA segment distribution to the AT

Method used

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  • Method and access network for indicating reverse CDMA section in TDD system
  • Method and access network for indicating reverse CDMA section in TDD system
  • Method and access network for indicating reverse CDMA section in TDD system

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Embodiment Construction

[0026] image 3 is a flowchart of a method for indicating a reverse CDMA segment in a TDD system according to an embodiment of the present invention, such as image 3 As shown, the method includes the following steps:

[0027] Step 301: Determine the number of reverse link physical frames in an interleaving length according to the interleaving length in the TDD system and the time slot structure of the superframe.

[0028] In this step, when the time slot structure of the superframe in the TDD system is M:N, and the interleaving length is K physical frame durations, the number of reverse link physical frames a in an interleaving length can be obtained by formula (1) to calculate:

[0029]

[0030] It can be seen from formula (1) that the number a of reverse link physical frames in one interleaving length is equal to the number K of physical frames in one interleaving length multiplied by the number of reverse link physical frames before the reverse link physical frame Th...

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Abstract

The invention discloses a method for indicating a reverse CDMA section in a time division dual (TDD) system. The method confirms the physical frame number of a reverse link in an interleave length according to the interleave length and a time slot structure of a superframe in the TDD system, further confirms the effective information bit length of an indication information in the CDMA section. The effective information bit of the indication information in the CDMA section and the reverse link physical frame in the interleave length are one-to-one correspondence. Each effective information bit indicates the CDMA section distribution in the corresponding reverse link physical frame. Finally an access network transmits the CDMA section indication information to an access terminal. The invention also discloses an access network. In the TDD system an AN can indicate reverse CDMA section distribution to an AT by using above technical scheme.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for indicating a reverse CDMA segment in a Time Division Duplex (TDD, Time Division Dual) system and an access network. Background technique [0002] Ultra Mobile Broadband (UMB, Ultra Mobile Broadband) technology is a powerful Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) solution designed for transmitting high-speed broadband data. [0003] In the UMB system, the hybrid automatic repeat request (HARQ) technology of incremental redundancy is used to improve the system performance. For example, in the reverse link, the data packets are turbo-encoded to form multiple subpackets, and the access terminal (AT, Access Terminal) first sends the first packet to the access network (AN, Access Network) on the allocated wireless resources. AN decodes the subpacket after receiving the subpacket. If the decoding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/216H04B1/707
Inventor 郑创明李鹏
Owner HUAWEI TECH CO LTD