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TD-SCDMA format Femtocell air interface synchronization method

A TD-SCDMA, air interface synchronization technology, applied in the field of wireless communication, can solve the problems of inability to guarantee synchronization accuracy, increase network transmission burden, etc., and achieve the effects of increasing network burden, low cost, and convenient use

Active Publication Date: 2013-03-06
CHINA YOUKE COMM TECH
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Problems solved by technology

The synchronization interval is usually 1, 2, 8, 16 and 64 seconds. If it is too long, it cannot guarantee sufficient synchronization accuracy, and if it is too short, it will increase the burden of network transmission.
[0011] This synchronization method is only suitable for networks with fewer intermediate routing nodes and less jitter in the bearer network

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  • TD-SCDMA format Femtocell air interface synchronization method
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  • TD-SCDMA format Femtocell air interface synchronization method

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Embodiment Construction

[0029] The method for the FemtoCell air interface synchronization of the TD-SCDMA standard of the present invention may further comprise the steps:

[0030] (1) After the FemtoCell is powered on for the first time, it obtains the number, frequency point, and codeword information of the surrounding macro base stations through the connected Femto gateway, and generates the corresponding macro base station neighbor cell list. FemtoCell uses the known macro base station neighbor list to search only a limited number of frequency points and codewords, and can also preset a specific base station for synchronization, thus effectively reducing the amount of synchronization calculation and synchronization time in the initial synchronization access process .

[0031] (2) Sort the adjacent macro base stations in the macro base station neighbor list, and select the macro base station with the best signal quality as the synchronization source base station for initial synchronous access.

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Abstract

The invention relates to the technical field of wireless communication, in particular to a TD-SCDMA format Femtocell air interface synchronization method, which comprises the following steps: 1, acquiring a corresponding macro base station neighbor list through an accessed Femto gateway; 2, sequencing the neighboring macro base stations in the macro base station neighbor list, and selecting a macro base station of which the signal quality is high as a synchronous signal source base station if initial synchronous access; 3, performing initial synchronous access by means of two-stage synchronization, wherein rough synchronization is performed by characteristic window matching at the first stage and fine synchronization is performed by filter related detection at the second stage, so that the initial synchronous access can be accomplished quickly; and 4, periodically detecting the synchronous signal source base station, computing self frequency error, correcting the frequency error by using the time regulating unit to maintain the synchronization, and monitoring if the synchronous signal source base station steps out at the same time. In the method, the synchonizaiton cost is low; and the synchronization requirement for the indoor application of a large batch of FemtoCells can be met on the premise of low cost.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for synchronizing the FemtoCell air interface of the TD-SCDMA standard. Background technique [0002] In the 3G era, the role of FemtoCell in solving indoor coverage has been widely recognized by operators. Like conventional macro base stations, the most important technology for commercial deployment of FemtoCell is how to realize the synchronization problem between a large number of FemtoCell base stations Once the synchronization is lost, it will cause strong signal interference, and in severe cases, mobile phone users cannot access the network at all. At present, operators mainly have the following solutions for solving base station synchronization. [0003] 1. GPS-based synchronization solution [0004] In order to realize the synchronization function of the base station, the GPS receiver needs to receive at least 4 satellite signals in order to real...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04B7/26
Inventor 赖克中张健荣许祥政林雨江秀清
Owner CHINA YOUKE COMM TECH
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