Single-frequency networking method in TD-SCDMA system

Abstract

A networking method of a single-frequency network in a TD-SCDMA system comprises the following: step A1: a UTRAN 110 determines a networking configuration proposal; step A2: a UTRAN completes system message setting according to the configuration of the step A1; step A3: the UTRAN sends the set system message within the coverage area; step A4: UE receives the system message sent by the UTRAN. The networking method can realize the coexistence of an N-frequency-point networking mode and a single-frequency network networking mode in a TD-SCDMA system; moreover, the networking method which has flexible planning can realize dynamic adjustment of wireless link resource between both modes according to traffic; meanwhile, the networking method is compatible with the prior frame structure and can send the configuration information of the single-frequency network and N frequency point to the UE under the condition that the prior signaling message structure is not changed; in addition, the networking method, which is simple and flexible, combines the advantages of the two networking modes and furthest increases frequency spectrum efficiency.

Description

technical field [0001] The present invention relates to the technical field of the third-generation Universal Mobile Telecommunications System (UMTS), in particular to a networking method for a single frequency network (Single Frequency Network, SFN) in a TD-SCDMA system. Background technique [0002] In traditional broadcasting systems, such as analog TV broadcasting, in order to expand the coverage, adjacent transmitting stations use different frequencies to avoid mutual interference, and the same frequency must be reused at a certain distance. This is the Multi-Frequency Network (Multi-Frequency Network). , MFN) method. In this way, one signal needs to occupy several times the frequency bandwidth, consuming precious spectrum resources. [0003] With the increasing shortage of spectrum resources, the networking mode of SFN has become a hot topic. The so-called single frequency network (SFN) refers to that several transmitting stations transmit the same signal on the same...

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Problems solved by technology

Therefore, if a time slot works in the single frequency network mode, the same frequency and the same time slot of the adjacent cell cannot work in the N frequency point mode

[0035] Second, when the cell is in the SFN mode, its Cell parameters ID must be the same as that of the neighboring cell; and in the time slot in the N-frequency point mode in the cell, the original Cell parameters ID of the cell is used. It is equivalent to having two Cell parameters IDs in a cell at the same time, but in the existing message structure, there can only be one Cell parameters ID 61 information element in a Primary CCPCH info 51 information element

[0036] Third, the UE cannot distinguish whether, in the cell where it is located, a certain frequency or a certain time slot is working in the N-frequency point mode or in the single frequency network mode

[0037] Therefore, for mobile TV services, the existing N-frequency point networking method of TD-SCDMA will no longer be applicable, and only the single frequency network mode can be used to improve frequency efficiency; and the message structure in the existing system cannot satisfy the single frequency network mode. The transfer of configuration information

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