Channel building method

Abstract

This invention discloses a channel building method in TDM-CDMA multi carrier system, which comprises: extending public transmission channel and building request information content with new-added carrier wave information for auxiliary carrier quick access physical channel; when building the access channel, the wireless network controller sends request information to node B, the latter building said channel according to the request information, monitors the upper pilot frequency channel and returns response information to wireless network controller. The user device can realize upper synchronism and improves resource utility.

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 channel establishment method in Time Division-Synchronization Code Division Multiple Access (TD-SCDMA, Time Division-Synchronization Code Division Multiple Access) multi-carrier system. Background technique [0002] At present, mobile communication has been developed to the third generation of mobile communication (3G, Third Generation). TD-SCDMA is one of the three main standards of the third generation mobile communication approved by the International Telecommunication Union (ITU, International Telecommunication Union) in May 2000 and by 3GPP in March 2001. 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] Like other mobile communication systems, i...

AI Technical Summary

Problems solved by technology

The RNC configures the UE on the secondary carrier, and there is no corresponding Fast Physical Access Channel (FPACH, Fast Physical Access Channel) on the secondary carrier. Therefore, after the UE sends the Sync_UL code on the secondary carrier, it cannot fail to get a response from NodeB , will inevitably lead to uplink synchronization failure

[0009] 2. When the UE is handed over from other cells to this cell, if the main carrier resources in this cell are insufficient and the auxiliary carrier has resources, it will easily lead to congestion of the main carrier, which greatly weakens the advantages of multiple carrier frequencies

[0010] When the UE is handed over from other cells to this cell, UEs that do not support multiple carrier frequencies cannot be configured on the secondary carrier. , As long as the primary carrier resources of the cell are insufficient, the UE can only be rejected

[0011] During the handover process, UEs that do not support multi-carrier frequencies can only be configured on the main carrier, which will easily lead to congestion of the main carrier and greatly weaken the advantages of multi-carrier frequencies

[0012] But at the current stage, most UEs cannot support multi-carrier frequencies, and the advantages of multi-carriers cannot be brought into play

[0013] 3. In the process of handover, the UE is assigned to the secondary carrier, and open-loop uplink synchronization operation is required. Even for a UE that supports multiple carrier frequencies, when the UE is assigned to the secondary carrier, it is easy to cause errors

[0018] The available length is TS1~TS6, 6*864Chips in total, so the system capacity utilization rate is 81%, that is, the capacity loss on the auxiliary carrier is 19%. In the existing multi-carrier frequency scheme, there is only one main carrier in a cell , while there are multiple secondary carriers, the capacity loss on the secondary carrier reaches 19%, which is intolerable

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