Same-frequency switching method and device for endangered electric quantity terminal

Abstract

The invention discloses a same-frequency switching method and device for an endangered electric quantity terminal, and the method is applied to a base station, and comprises the steps: receiving an endangered electric quantity alarm signal reported by a terminal; according to a measurement report reported by the terminal, judging whether the uplink signal-to-noise ratio of the terminal is not less than a signal-to-noise ratio threshold value and whether the moving speed of the terminal is not greater than a speed threshold value; if yes, amplifying the current same-frequency switching hysteresis value to obtain a same-frequency switching hysteresis value of the endangered electric quantity mode; based on the same-frequency switching hysteresis value of the endangered electric quantity mode, issuing a measurement control instruction to the terminal, so that the terminal detects whether a first event A3 is triggered or not according to the same-frequency switching hysteresis value of the endangered electric quantity mode; and receiving a first event A3 reported by the terminal, and completing cell switching processing of the terminal according to the first event A3. According to the mode, the common-frequency switching algorithm of the endangered electric quantity mode is obtained by modifying the normal common-frequency switching algorithm, and the residence time of the endangered electric quantity terminal in the service cell can be prolonged.

Description

technical field [0001] The present invention relates to the technical field of LTE wireless network, in particular to a method and device for same-frequency handover of endangered power terminals. Background technique [0002] At present, the same-frequency handover algorithm in LTE system design only has coverage-based handover. The coverage-based intra-frequency handover target cell decision depends on the reporting of event A3, and the target cell is obtained from event A3. [0003] figure 2 A schematic diagram showing trigger conditions and cancellation conditions of event A3 in the prior art. like figure 2 As shown, the trigger condition is: Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off (Formula 1), and the above condition lasts for TimeToTrig time. The cancellation condition is: Mn+Ofn+Ocn+Hys<Ms+Ofs+Ocs+Off (Formula 2), and the above condition lasts for TimeToTrig time. [0004] The meanings of the variables in the above formula are as follows: Ms and Mn represent the measure...

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Problems solved by technology

[0005] However, the inventor found in the process of implementing the present invention that the method of performing same-frequency handover based on the reported event A3 has the following defects: (1) TimeToTrig and Hys control the difficulty of handover, and if the setting is too large, it will easily lead to delayed handover and call drop ; On the contrary, it will easily cause ping-pong switching

(2) The handover decision is based only on the RSRP and RSRQ values ​​of the serving cell and neighboring cells, and there may be cases where the signal-to-noise ratio is worse and the throughput is lower after switching...

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