Method for shortening reading time of system frame number in item-reestablishment hard switch
A system frame number and reading time technology, applied in the field of wireless communication, can solve problems such as long process and affecting switching performance
Inactive Publication Date: 2010-12-08
ZTE CORP
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However, according to the synchronization and SFN transmission mechanism of TD-SCDMA, it is necessary to read the phase modulation information on the DwPTS (Downlink Pilot Time Slot, downlink pilot time slot) of the target cell first, and then find the P-CCPCH (Primary Common Control Physical Channel , basic public control channel) to read the SFN information sent on the BCH (Broadcast Channel, broadcast channel), this process may be very long, thus affecting the performance of handover
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[0030] According to the protocol standard message interaction process, the present invention describes a method for shortening the SFN reading time in the time re-initialized hard handover.
[0031] Such as figure 1 Shown, workflow of the present invention comprises the following steps:
[0032] Step S101, the RNC decides to initiate a time reconstruction hard handover, and the value of the information element "Timing indication" carried by the RNC in a message such as physical channel reconfiguration, transport channel reconfiguration or RB reconfiguration is "initialize", indicating that time reconstruction is initiated Hard handover indication information (DOFF value is Default DPCH Offset Value, which is unique to time reconstruction hard handover and used to recalculate CFN);
[0033] Step S102, the RNC sends a physical channel reconfiguration message to the UE, and at the same time, the RNC indicates in the physical channel reconfiguration message whether the timing of ...
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The invention proposes a method for shortening the time for reading a system frame number in time re-initialized, which comprises the following steps: Step 1, a radio network controller initiates a time re-initialized and sends a reconfiguration message to a mobile terminal and whether the system frame number timing in a target cell is in accordance with the system frame number timing in a sourcecell is indicated in the reconfiguration message; Step 2, the mobile terminal receives the reconfiguration message and decides whether the system frame number timing in the target cell is same as thesystem frame number timing in the source cell according to the reconfiguration message; if the system frame number timing in the target cell is the same with the system frame number timing in the source cell, then the mobile terminal calculates a connection frame number using the system frame number of the source cell; otherwise, the mobile terminal rereads the system frame number of the target cell; Step 3, the mobile terminal returns a reconfiguration accomplishment response to the radio network controller after accomplishing the reconfiguration. The invention greatly shortens the delay forcarrying out the time re-initialized between same SFN cells and enhances the handoff speed.
Description
technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for shortening the reading time of SFN (System Frame Number, system frame number) in time re-initialized hard handover. Background technique [0002] In the current TD-SCDMA system, for time re-initialized hard handover, the terminal needs to read the SFN of the target cell to calculate a new CFN (Connection Frame Number, connection frame number). However, according to the synchronization and SFN transmission mechanism of TD-SCDMA, it is necessary to read the phase modulation information on the DwPTS (Downlink Pilot Time Slot, downlink pilot time slot) of the target cell first, and then find the P-CCPCH (Primary Common Control Physical Channel , the position of the basic public control channel) to read the SFN information sent on the BCH (Broadcast Channel, broadcast channel), this process may be very long, thereby affecting the performance of the handover. ...
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IPC IPC(8): H04W36/08H04W72/14H04W36/00
Inventor 黄河
Owner ZTE CORP