Method for repeater to obtain switch point in TD-SCDMA system

Abstract

The invention relates to a method of direct station obtains breaking point in TD-SCDMA system; the method includes steps as following: when it is started, the direct station is switched to the state of receiving down-bound signal to receive down-bound signal; the direct station captures the time that down-bound pilot frequency signal arrives at the direct station; from the hour that the TS2 time slot ends, the hour that every time slot ends is supposed as possible time of the second switching point; determining whether the switching section is a real time switching section; processing the next time slot; when the direct station receives the up-bound pilot frequency signal for the second time, then it is recovered to normal condition to execute the ascending-descending switch of step 1-step 6. The invention adopts method of base band synchronization to obtain the information of breaking point automatically without distribution with benefactor base station, it can be worked at system that the distribution mode of ascending-descending time slot is continuously changeable, the engineering is easy to install, the cost is low, and the interference of noise to areola can be decreased efficiently.

Description

technical field [0001] The present invention relates to the TD-SCDMA system, and aims at the acquisition of the uplink and downlink conversion points of the repeater in the TD-SCDMA system, and proposes a simple and feasible baseband processing scheme, specifically a repeater in the TD-SCDMA system The method to get the transformation point. Background technique [0002] The TD-SCDMA system (3G mobile communication system) repeater is the same as the repeater of other mobile communication systems. The repeater can enhance and forward the signals sent by the base station and the mobile phone, thereby expanding or supplementing the coverage of the communication network. . Currently existing repeaters can operate in GSM, IS95, CDMA2000, W-CDMA and other mobile communication systems using FDD duplex mode. In these systems, uplink wireless signals and downlink wireless signals are at different frequencies. Therefore, the existing repeater generally includes two sets of processi...

AI Technical Summary

Problems solved by technology

Obviously, the cost of such a solution will be high, and for enterprises that only produce repeaters, they need to contact the corresponding donor base station to modulate the information of the second conversion point into the specific downlink information, and the repeater will pass the corresponding solution Call the module to find out the position information of the second conversion point

[0005] In addition, when there is no useful signal input at the input end of the repeater, the noise signal presented at the output end, compared with the base station, the repeater has uplink and downlink noise floor

Among them, the uplink noise floor has a greater impact on the system, and the increase of the bottom noise floor of the repeater must be controlled within the interference margin

Ordinary repeaters will switch to the uplink state regardless of whether there is an uplink signal sent by users in the service area in the uplink time slot, which may amplify the bottom noise and cause interference to the cell

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