ZC root sequence index allocation method and device

A root sequence index, to-be-allocated technology, used in wireless communications, electrical components, network planning, etc.

Active Publication Date: 2011-12-14
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the embodiments of the present invention is to provide a ZC root sequence

Method used

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  • ZC root sequence index allocation method and device
  • ZC root sequence index allocation method and device
  • ZC root sequence index allocation method and device

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Embodiment Construction

[0024] For reference and clarity, technical terms, abbreviations or abbreviations used hereinafter are summarized as follows:

[0025] PRACH: Physical Radom Access Channel, physical random access channel;

[0026] ZC: Zadoff-Chu sequence, Zadoff-Chu sequence;

[0027] CM: Cubic Metric, cubic system;

[0028] RTD: Round trip delay, round trip delay;

[0029] FDD: Frequency Division Duplexing, Frequency Division Duplex;

[0030] TDD: Time Division Duplexing, time division duplex;

[0031] Physical root sequence number: physical root sequence index.

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the...

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Abstract

The embodiment of the invention discloses a method and a device for allocating Zadoff-Chu (ZC) root sequence indexes, which are used for solving the problem of difficulty in the allocation of the ZC root sequence indexes in each cell. The method comprises the followings steps of: acquiring parameters of cells to be allocated, wherein the parameters comprise cell leading format types (1, 2, 3 and 4), cell types and cell radius values, and the cell types comprise a high-speed cell type and a low-speed cell type; acquiring an Ncs value of a configuration zone of a ZC zero correlation zone according to the cell radius values; and allocating the ZC root sequence indexes of the cells to be allocated according to the cell leading format types, the cell types and the Ncs value until the number of the cells to be allocated is zero and/or all the available root sequence indexes are used completely. By the embodiment of the invention, the ZC root sequence indexes of the cells to be allocated are allocated according to the cell leading format types, the cell types and the Ncs value, so that the problem of difficulty in the allocation of the ZC root sequence indexes in each cell is solved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, relates to a ZC root sequence index allocation method and device. Background technique [0002] In a Long Term Evolution (LTE for short) system, a base station notifies a mobile device (User Equipment, UE for short) through a Broadcast Channel (BCH for short) channel that a Random Access Channel (RACH for short) of the cell is available. The first ZC root sequence index (Logical root number) and zero correlation zone configuration area (Ncs) value used, the UE will use a certain mapping rule to calculate the physical root sequence index according to the above index, and then obtain the ZC root sequence according to the formula. The preamble sequence can be generated by cyclically shifting the ZC root sequence according to parameters such as the Ncs value, and the UE selects the preamble sequence to access a random receiving channel at a random time. ...

Claims

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Application Information

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IPC IPC(8): H04W16/12
Inventor 王辉武秀何洋罗茜
Owner SHANGHAI HUAWEI TECH CO LTD
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