Patent ID: 9253690
Filing Date: 2016-02-02
CPC Classification: H04W

Claim Text:
1. A method for controlling cell reselection in a cellular communication network, comprising: monitoring, by a communication device, signal strength of a current serving cell; when the signal strength of the current serving cell has been lower than a threshold value for longer than a first time period, successively acquiring, by the communication device, signal strengths of the current serving cell and at least one neighboring cell within a second time period for a predetermined number of times; determining, by the communication device, signal stability of the current serving cell according to the signal strength of the current serving cell, and signal stability of the neighboring cell according to the signal strength of the neighboring cell; and when the signal stability of the neighboring cell is better than the signal stability of the current serving cell, reselecting, by the communication device, the neighboring cell as a serving cell; wherein the signal stability is represented by a signal stability value, the signal strength is represented by a signal strength value, and the signal stability value is a variance value of the signal strength value, and wherein the signal stability of the current serving cell is represented by the signal stability value of the current serving cell, and the signal stability value of the current serving cell is calculated according to: wherein Q′ var is the signal stability value of the current serving cell, q n is a signal strength value of the current serving cell that is acquired at the n th time point within the second time period, Q avg is an average value of the signal strength values of the current serving cell that are acquired at N time points within the second time period, N is the number of times when the signal strength of the current serving cell is acquired within the second time period, and N is greater than or equal to 2.