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

A technology of code division multiple access and time division synchronization, which is applied in the field of wireless communication, can solve the problems of large synchronization code delay, etc., and achieve the effect of reducing detection delay, reducing the possibility of misjudgment, and improving detection efficiency

Inactive Publication Date: 2008-09-17
ZTE CORP
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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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  • Method for improving uplink synchronization detection efficiency in time division synchronous code division multi-address system
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  • Method for improving uplink synchronization detection efficiency in time division synchronous code division multi-address system

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Embodiment Construction

[0040] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] In the uplink synchronization code detection process of the TD-SCDMA system, in order to solve the problem of inefficiency caused by the serial detection of the existing digital signal processing technology, this embodiment will improve the high-level configuration to clarify that the NodeB needs to The number of detected synchronization codes and the specific synchronization code sequence are used to improve the processing delay and reduce the possibility of misjudgment, thereby improving the detection efficiency of synchronization codes.

[0042] Such as Figure 4 As shown, the method for improving the efficiency of uplink synchronization detection in this embodiment includes the following steps:

[0043] Step 401: The upper layer of the network configures the access service level, the synchronizat...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/707H04B1/7073
Inventor 陈慧康健丁美玲
Owner ZTE CORP
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