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Method for up going synchronization and accessing customer equipment in multicarrier system

A multi-carrier system and user equipment technology, which is applied in multi-carrier systems and communication between multiple stations, can solve problems such as access collision and blocking, improve access performance, and reduce the probability of collision and blocking Effect

Inactive Publication Date: 2006-02-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase of the number of users in the cell, it is easy to cause access collision and blocking

Method used

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  • Method for up going synchronization and accessing customer equipment in multicarrier system
  • Method for up going synchronization and accessing customer equipment in multicarrier system
  • Method for up going synchronization and accessing customer equipment in multicarrier system

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Embodiment Construction

[0035] The multi-carrier system uplink synchronization and user equipment access method of the present invention can be applied to TD-SCDMA network. In TD-SCDMA network, the process of user equipment accessing the system is similar to that of the second generation GSM system. The special requirements of the access process specially increase the processing of uplink synchronization. The present invention increases the number of optional uplink synchronization codes SYNC-UL for each multi-carrier system to reduce the probability of cell access collision and blocking during uplink synchronization processing, and greatly improves network access performance.

[0036] refer to figure 2 , which is the main flow chart of the multi-carrier system uplink synchronization method of the present invention. The method mainly includes the following steps:

[0037] First, step 10 is performed to expand the uplink synchronization code groups of the multi-carrier cell, so as to increase the n...

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Abstract

The method includes steps: (1) extending up going synchronization code group for multicarrier sectors in order to increase number of up going synchronization code in each group; (2) selecting up going synchronization code at random from the said extended synchronization code group, user device sends the said up going synchronization code to system; (3) based on the up going synchronization code, the system carried out relevant up going synchronization. The invention also discloses Method for accessing user device in multicarrier system. Through increasing number of SYNC-UL in up going synchronization code available to each sector, the invention reduces probability of collision and blocking in time of sector access, and raises access performance of network greatly.

Description

technical field [0001] The present invention relates to code division multiple access communication technology, more specifically, the present invention relates to a kind of time division synchronous code division multiple access (TD-SCDMA, Time Division-Synchronization Code Division Multiple Access) system realizes multi-carrier system uplink synchronization and user The method of device access. Background technique [0002] At present, mobile communication has been developed to the third generation of mobile communication (3G, Third Generation). One of the main criteria. As a 3G standard of time-division multiplexing, TD-SCDMA is regarded as a time-division multiplexing technical solution with a low chip rate (1.28MCps, 1.28 megachips / second) in the ITU standard. [0003] figure 1 It is the TD-SCDMA frame structure defined in the ITU standard protocol. Such as figure 1 As shown, in time, the TD-SCDMA signal is divided into periodic time units. A basic time unit is ca...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04L27/32
Inventor 许炳
Owner HUAWEI TECH CO LTD