Air interface synchronizing method between Femto device and macro station

Abstract

The invention provides an air interface synchronizing method between a Femto device and a macro station. The method comprises: the Femto device determines an air interface synchronous object macro station, and reports the macro station to a home eNodeB management system (HMS); the HMS obtains a transmission delay (T-delay) between the macro station and the Femto device and sends T-delay to the Femto device; the Femto device detects the moment TRX of receiving a macro station beacon channel, and computes a timing border of the beacon channel of the Femto device to serve as TRX-T-delay according to the moment and the T-delay, thereby determining the timing synchronous relation of the Femto and all other channels. By applying the air interface synchronizing method, the success rate of synchronizing the TD-SCDMA (time-division-synchronization code division multiple access) Femto and an outdoor macro station through an air interface detection manner can be improved.

Description

technical field [0001] The invention relates to a synchronization technology in a communication system, in particular to an air interface synchronization method between a Femto device and a macro station. Background technique [0002] In the network deployment of TD-SCDMA Femto equipment, there are synchronization requirements between Femto equipment and between Femto equipment and macro stations. Currently available candidate solutions include: GPS-based synchronization, 1588-based network synchronization solutions, and air interface synchronization solutions. [0003] In the current air interface synchronization solution, usually the Femto device initiates uplink access to the synchronization object (that is, the timing reference source, usually a macro station that obtains synchronization timing through GPS) in UE mode, and obtains the reference timing of the synchronization object , and then adjust the timing of the Femto device according to the reference timing, so as ...

AI Technical Summary

Problems solved by technology

However, because Femto is generally used in indoor scenarios such as homes, the maximum transmit power is strictly limited, which is generally lower than the maximum transmit power of the UE. In addition to the impact of signal penetration loss and other effects, in many cases, although the Femto device can detect outdoor The downlink signal of the macro station, but because the power of the uplink signal initiated by Femto is small, the uplink access process initiated when the macro station is synchronized cannot be successful, which greatly affects the Femto equipment in the Femto network deployment. Synchronization success rate of the station

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