Method for measuring TD-SCDMA cell under different modes, and multi-mode terminal

Abstract

The invention relates to the field of communications, and discloses a method for measuring a TD-SCDMA cell under different modes, and a multi-mode terminal. In the method, the multi-mode terminal is used for receiving measuring data of a TD-SCDMA cell, and a GAP length is the sum of the length of a TD-SCDMA subframe and the length of the training sequence code of a TS0. After the position of a DwPTS is determined from received data, according to the relatively fixed positions of the DwPTS time slot and the TS0 time slot, the training sequence code in the TS0 and the position in the received data can be determined so that the capability of finishing receiving and measuring of needed data is enabled within 5.1125 ms (one subframe+144chip). When the multi-mode terminal resides in a non-TD-SCDMA mode, what is needed for realizing cell measurement on a TD-SCDMA frequency point is only a 5.1125 ms (one subframe+144chip) GAP length.

Description

technical field [0001] The invention relates to the field of communication, in particular to the measurement of TD-SCDMA cells by multi-mode terminals in different modes. Background technique [0002] The frame structure of TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system is as follows: figure 1 As shown, the regular time slot is 864 chips (chips), and the length of a subframe is 6400 chips. Code channels 1 and 2 of TS0 (time slot 0) carry PCCPCH (primary public control physical channel), figure 1 The DwPTS in is the downlink pilot time slot, which is composed of a 64chip SYNC_DL (downlink synchronization code) sequence and a 32chips DP (guard interval). TS1 to TS6 are service time slots, carrying service data. [0003] To measure a TD-SCDMA cell, it is necessary to receive data of DwPTS and TS0 time slots. The DwPTS time slot is used for synchronization. The MIDAMBLE (training sequence) part of TS0 can be used for RSCP (received signal code powe...

AI Technical Summary

Problems solved by technology

[0006] When a multimode terminal resides in a non-TD-SCDMA mode (that is, when a different system is used as the main mode), the measurement GAP that needs to be provided to TD-SCDMA in IDLE (idle state) should be as short as possible, and the current solution requires 5.775 ms, if the main mode is GSM, then since the idle window allocated in the GSM connection state is 10 time slots (5.76875ms), and considering the radio frequency preparation time, it may cause the data of 5.775ms length to be unable to receive all

Or, if the main mode is LTE (long-term performance network), then due to the idle window of 6ms allocated in the LTE connection state, it may also cause the data with a length of 5.775ms to be unable to receive all, which will cause the cell measurement on the TD-SCDMA frequency point to fail.

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