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Random access method of multi-carrier covering of TD-SCDMA system

A TD-SCDMA and random access technology, which is applied in the field of random access covered by multiple carrier frequencies in mobile communication systems, can solve problems such as handover difficulties, low system efficiency, and complicated terminal measurement

Active Publication Date: 2006-01-11
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a random access method under the condition of multi-carrier frequency coverage of the TD-SCDMA system to solve the problems of difficult cell search, complicated terminal measurement, difficult switching and low system efficiency

Method used

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  • Random access method of multi-carrier covering of TD-SCDMA system
  • Random access method of multi-carrier covering of TD-SCDMA system
  • Random access method of multi-carrier covering of TD-SCDMA system

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Experimental program
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Embodiment Construction

[0023] In Fig. 1, a multi-carrier frequency coverage situation of a TD-SCDMA system is disclosed. UE is located at the intersection of four multi-carrier frequency cells Cell_A, Cell_B, Cell_C and Cell_D, and each cell has 6 carriers. In cells Cell_A, Cell_B, and Cell_C, f3 is used as a pilot frequency point, and auxiliary carrier frequencies are f1, f2, f4, f5, and f6. In the cell Cell_D, f6 is used as a pilot frequency point, and auxiliary carrier frequencies are f1, f2, f3, f4 and f5.

[0024] In Figure 2, the physical frame structure of the cell Cell_A multi-carrier frequency cell is revealed. Taking the cell Cell_A as an example, the cell Cell_A is a 6-carrier cell, and the pilot carrier frequency is f3, and the DwPTS time slot of the f3 carrier frequency sends the downlink pilot Code SYNC-DL. The other frequency points f1, f2, f4, f5, and f6 are "auxiliary carrier frequencies". The DwPTS time slots of these carrier frequencies are in a blocked (Idle) state, and no data ...

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Abstract

This invention relates to a random access method covered by multi-carrier frequency for realizing TD-SCDMA system, which designs every primary / sector a logic zone composed of multiple carrier frequencies with one as the pilot and those of other points as the assistant, said pilot carrier frequency sends down stream synchronous channel at the downstream synchronous time slot, and that of the assistant is at the blocking state, the two frequencies use the same intrusion code and basic training sequence code. A public control channel is set at TSO of the pilot to carry data from the transmission channel and provide system information broadcast covering the entire primary / sector. The assistant public control channel and bp instruction channel loading the access and bp channels are matched at the pilot, a forward physical access channel and random access channel are set on the pilot and assistant the UE is accessed at the up DCH channels of the pilot or that of the assistant.

Description

technical field [0001] The invention relates to a mobile communication technology, in particular to a random access method for multi-carrier frequency coverage of a mobile communication system. Background technique [0002] TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) is one of the third-generation mobile communication space interface technical specifications officially released by ITU. TD-SCDMA system, like other mobile communication systems, in order to meet the growing needs of the mobile communication market, Carrying out multi-carrier frequency coverage in the same sector / cell will be an important means for TD-SCDMA system to increase system capacity. [0003] At present, the operation and configuration of wireless resources on the Uu interface are all carried out for one carrier frequency. In the process of establishing a cell on the Iub interface, a cell (Cell) is only configured with an absolute frequency point number; if there are multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04J13/00H04W74/08
Inventor 江溯
Owner ZTE CORP
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