Frequency synchronization method and device

A frequency synchronization and frequency technology, applied in the direction of synchronization devices, electrical components, wireless communication, etc., can solve the problems of complex frequency offset estimation process in cooperative cells, and achieve the goal of reducing the amount of information interaction, simplifying the interaction process, and simplifying the frequency offset estimation process Effect

Active Publication Date: 2016-08-10
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a frequency synchronization method, which aims to solve the problem of complex frequency offset estimation process of coordinated cells in the prior art

Method used

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  • Frequency synchronization method and device
  • Frequency synchronization method and device

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Embodiment approach

[0064] Figure 5 A preferred implementation manner of step S301 of the present invention is shown, which is described in detail as follows:

[0065] Before the first base station notifies each second base station to feed back the second frequency offset to the first base station, the method further includes:

[0066] Step S501: the first base station acquires a reference signal measurement value of the second base station measured by a UE served by the first base station.

[0067] In the cooperating set cell, since some UEs may be served by one or more of cell 0, cell 1, cell 2... At this time, UE0 can respectively measure the reference signal measurement values ​​of the above-mentioned three cell base stations, and send corresponding reference signal measurement information to each serving cell base station, thus, each base station can obtain the UE served by it. The reported reference signal measurement information of the cell where the base station is located and neighbor...

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Abstract

The present invention is applicable to the field of mobile communication, and particularly provides a frequency synchronization method and device, including: the first base station obtains the first frequency offset, and notifies the second base station to feed back the second frequency offset to the first base station; the first base station obtains the first frequency offset; A frequency offset is the frequency difference between the first base station and the UE it serves, which is obtained by measuring the pilot signal sent by the UE served by the first base station, and the second frequency offset is the frequency difference between the second base station and the UE served by the first base station. The frequency difference of the UE served by the first base station or the second base station is obtained by the second base station measuring the pilot signal sent by the first base station or the UE served by the second base station; the first base station according to A frequency difference between the first frequency offset and the second frequency offset and the second base station is obtained, so that the second base station synchronizes its own frequency to the frequency of the first base station according to the frequency difference. The present invention greatly simplifies the frequency offset estimation process of the cooperative cell without changing the existing protocol.

Description

technical field [0001] The invention belongs to the field of mobile communication, and in particular relates to a frequency synchronization method and device. Background technique [0002] Coordinate Multi-Point Joint Process / Joint Transmission (Coordinate Multi-Point Joint Process / Joint Transmission, CoMP JP / JT) is an important feature of Long Term Evolution (LTE) Rel10. For Frequency Division Duplexing (Frequency Division Duplexing, FDD) and Time Division Duplexing (Time Division Duplexing, TDD) modes, under the CoMP JT scheme, the frequency synchronization problem between the coordinated base stations is the key. The simulation results show that when the frequency deviation of the two base stations is 65 Hz, the performance of the high-order Modulation Coding Scheme (MCS) has deteriorated significantly. Therefore, it is necessary to control the frequency deviation between the cooperative base stations. [0003] by figure 1 The frequency error diagram of two coordinated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/0035
Inventor 易雄书
Owner HUAWEI TECH CO LTD
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