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An optimization method for LTE handover based on power adjustment

An optimization method and power compensation technology, applied in wireless communication, electrical components, etc., can solve the problem of not being able to intuitively reflect the success rate of cell handover, and achieve the effect of reducing system signaling load, reducing ping-pong handover, and ensuring continuity

Inactive Publication Date: 2018-11-02
HANGZHOU DIANZI UNIV
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Problems solved by technology

The disadvantage is that the measurement results of the cell by this method are based on the historical measurement of the signal level and the size of the cell load, which cannot intuitively reflect the cell handover success rate

Method used

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  • An optimization method for LTE handover based on power adjustment
  • An optimization method for LTE handover based on power adjustment
  • An optimization method for LTE handover based on power adjustment

Examples

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Embodiment 1

[0028] The power adjustment-based LTE cell handover method described in this example includes steps such as calculating the cell SNR, power compensation, cell personality offset parameter correction, rate correction, and handover judgment.

[0029] Step 1: Calculate the signal-to-noise ratio of the cell;

[0030] Set the service rate V that service S can provide in cell C sc , the bandwidth B provided by cell C for service S sc , the bit error rate BER of this service sc , calculate the signal-to-noise ratio of the service:

[0031] Step 2: power compensation;

[0032] Set cell power headroom P hn , SNR threshold SINR th , for the receiving level RSRP of neighboring cell n sn and the level value RSRP of the current primary serving cell ss , if the condition SINR is satisfied sn ≥SINR th , then perform power compensation on the neighboring cell: Among them, abs(*) represents the absolute value function;

[0033] Step 3: Improve the handover failure rate;

[003...

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Abstract

The invention discloses an LTE handover optimization method based on power adjustment. The method specifically comprises the steps of: accounting a cell signal to noise ratio, and compensating power; and improving a handover failure rate, correcting a speed, and making a handover decision. The LTE handover optimization method based on power compensation is characterized in that by means of power margins, statistics is carried out on history handover failure rates of cells according to SINR of a target adjacent cell, power compensation is carried out on the cells which are good in channel quality but high in handover failure rate, and individual offset and delay parameters of the cells are corrected, so that the purpose of switching optimization is achieved.

Description

technical field [0001] The invention relates to a handover method of an LTE system, in particular to a cell handover optimization method based on power adjustment. Background technique [0002] By adopting multiple key technologies such as OFDM, SC-FDMA, and MIMO, LTE can significantly reduce the delay of the user plane and the control plane, achieve faster data rates than current 2 / 3G systems, and provide higher cell throughput. As one of the mobility management functions, handover remains one of the most common procedures in LTE. When the terminal is in the connected state and moves between cells, the eNodeB may initiate a handover based on a certain strategy, and the success of the handover directly affects the perception of the user, especially for real-time services. [0003] 2013.4.3 disclosed a multi-factor decision-based LTE cell handover method with the Chinese patent application number CN201310114527.2, which includes the following steps: Step 1: Cell signal level...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W36/08
CPCH04W24/02H04W36/08
Inventor 李静
Owner HANGZHOU DIANZI UNIV
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