Switch control method of dual-mode terminal between different systems under dual idle state
A dual-mode terminal and control method technology, applied in the field of wireless communication, can solve the problems of simultaneous detection of signal quality of 2G adjacent cells, which cannot be done, and achieve high practical value, simple implementation, and rapid development
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no. 1 example
[0039] The handover control method when both the serving cell and the TD-SCDMA neighbor cell become worse, such as figure 2 shown, including the following steps:
[0040] Step 201, the dual-mode terminal is in a connected state in a certain cell in the TD-SCDMA network, and the services carried by the current 3G network can run in the target 2G network;
[0041] Step 202, the RNC commands the terminal to perform in-network measurement (intra-frequency and inter-frequency measurement) by the measurement control message, and measures the signal quality of the serving cell and the TD-SCDMA neighboring cell;
[0042] The purpose of measuring in-network is to judge whether it is necessary to switch to TD-SCDMA network.
[0043] Step 203, the terminal measures the serving cell and the TD-SCDMA neighboring cell according to the measurement control message, and returns a measurement report to the radio network controller after the measurement is completed;
[0044] Step 204, RNC ju...
no. 2 example
[0048] Handover control method when the serving cell is overloaded, such as image 3 shown, including the following steps:
[0049] Step 301, the dual-mode terminal is in a connected state in a certain cell in the TD-SCDMA network, and the services carried by the current 3G network can run in the target 2G network;
[0050] Step 302, the RNC starts a load evaluation algorithm, and evaluates the load situation of the serving cell according to various indicators of system operation;
[0051] Step 303, judging whether the load of the serving cell is overloaded according to the load evaluation result, if yes, execute step 304, otherwise execute step 305;
[0052] Step 304, judging whether the TD-SCDMA neighbor cell and the TD-SCDMA cell with the same coverage are all overloaded, if yes, execute step 306, otherwise execute step 305;
[0053] The purpose of evaluating the loads of the three types of cells is to judge whether it is necessary to switch to the TD-SCDMA network.
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no. 3 example
[0057] Handover control method when a dual-mode terminal enters a TD-SCDMA edge cell, such as Figure 4 shown, including the following steps:
[0058] Step 401, the dual-mode terminal is in a connected state in a certain cell in the TD-SCDMA network, and the services carried by the current 3G network can run in the target 2G network;
[0059] Step 402, the RNC reads the system configuration information, if the serving cell is configured as "switching to the 2G system upon entering the cell", then execute step 404, otherwise execute step 403;
[0060] That is to say, treat the edge cell of TD-SCDMA as a transition zone for 2G and 3G switching, and switch as long as it enters the cell.
[0061] Step 403, the judgment result is that the dual-mode terminal does not switch to the 2G network;
[0062] Step 404, the judgment result is that the dual-mode terminal switches to the 2G network.
[0063] Figure 4 The handover control method is very practical for TD-SCDMA network in th...
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