Method for improving uplink synchronization detection efficiency in time division synchronous code division multi-address system

Abstract

The present invention discloses a method for increasing the detecting efficiency of the ascending synchronous code in a time division synchronization code division multiple access system. The high layer of the network allocates an access service grade and synchronous code and the corresponding information of the ascending pilot channel UpPCH sub-channel to the terminal when the small area is accidentally accessed. The node B is allocated with an ascending pilot channel UpPCH sub-channel and a corresponding synchronous information. The terminal transmits the corresponding ascending synchronous code on the sub-channel corresponding with the access service grade itself and initializes an ascending synchronization process to a node B. The node B confirms an UpPCH sub-channel number according to the system sub-frame number and only detects the ascending synchronous code which is allowed to be transmitted in the UpPCH sub-channel in an ascending pilot frequency time slot of a sub-frame. The invention leads to that the NodeB assures the number of the synchronous code to be detected and the specific synchronous code sequence through improving the allocation of the high layer. The probability of time delay of detection and error judgment is reduced, and the detecting efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an uplink synchronization technology in a time division synchronous code division multiple access system (TD-SCDMA). Background technique [0002] TD-SCDMA technology is one of the main technologies of the third-generation mobile communication system. In the uplink of the TD-SCDMA system, multiple UEs (User Equipment, user terminals) can simultaneously send signals to the NodeB (Node B, that is, the base station). In order to prevent mutual interference of signals between terminals, it is necessary to perform uplink synchronization control for each UE to ensure that their signals reach the NodeB at the same time. [0003] The radio frame of TD-SCDMA contains 2 subframes, each subframe contains 3 special time slots in addition to regular time slots, which are downlink pilot time slot (DwPTS), guard interval (GP), uplink pilot time slot Time slot (UpPTS), where UpPT...

AI Technical Summary

Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a method for improving the efficiency of uplink synchronization detection in a time-division synchronous code division multiple access system, to solve the problems of large time delay and misjudgment in the detection of synchronization codes in the prior art, so as to improve synchronization code detection efficiency

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