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Pilot frequency strength reporting method in multi-carrier system

A technology of multi-carrier system and pilot strength, applied in the field of soft handover technology

Inactive Publication Date: 2011-03-02
STATE GRID BEIJING ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0021]2. Even if the member pilots of the same pilot group have the same coverage and strength in the actual network, when dynamic threshold is used, one pilot is used to represent one pilot frequency group, to judge whether the entire pilot group should be added to the active set, and in some cases, there are unreasonable places

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] The defects of the existing technology can be summarized as the fact that the strengths of the pilots in the same pilot group are actually inconsistent, but a pilot is used in the routing update message to represent a pilot group, which may cause a decrease in the success rate of soft handover , and the strength of each pilot in the same pilot group is actually the same. When using the dynamic threshold, the candidate set uses one pilot to represent a pilot group to judge whether the entire pilot group should be added to the active set. In some cases It is unreasonable.

[0036] Aiming at the above technical problems, the present invention proposes improvements to the reporting message of the pilot frequency strength of the multi-carrier CDMA2000 HRPD B system, that is, the reporting frequency selection included in the routing ...

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Abstract

The invention discloses a pilot strength report method in a multi-carrier system. At an access terminal side, according to the measurement result and a corresponding threshold, pilot frequencies are selected in each pilot group in a corresponding pilot set, the report is made in a route updating message sent to an access network. The improvement is that: one or more pilot frequencies in the pilotgroup are selectively reported in each pilot group in the corresponding pilot set. With the method, the route updating message supports a plurality of member pilot frequencies which report the same pilot group, which provides the switching judging process with more detailed information of the pilot frequencies in the same pilot group, improves the correctness of the soft switching judging of the multi-carrier, and improves the success rate of the soft switching.

Description

technical field [0001] The invention relates to a mobile communication system, in particular to a soft handover technique in a multi-carrier CDMA2000 HRPD (high speed packet data) system. Background technique [0002] As one of the unique key technologies of the CDMA system, soft handoff plays an extremely important role in improving call quality, increasing system capacity, reducing system interference, and reducing system call drop rate. The process of soft handover starts from the access terminal (AT), and the AT continuously measures the signal strength of the pilot frequency (Pilot) channel in the system. In order to effectively search the pilot channel, the pilot channel in the CDMA system is divided into four pilots: active set, candidate set, neighbor set and remaining set. gather. The active set consists of a set of pilots corresponding to the traffic channel with sufficient signal strength, and the AT is currently maintaining the connection; the candidate set is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 陈刚黄溆安徐子华杨国张万帅
Owner STATE GRID BEIJING ELECTRIC POWER
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