Patent ID: 9432880
Filing Date: 2016-08-30
CPC Classification: H04B,H04W

Claim Text:
1. A method of uplink intra-frequency load balancing, wherein the uplink intra-frequency load balancing can be performed by adjusting a beam direction of a User Equipment (UE), the method comprising: determining a cell load level of each of a plurality of cells based on an uplink load measurement received from a base station of a corresponding one of the plurality of cells; determining a beam-forming capability of the UE based on a beam-forming gain of the UE; calculating a cell balancing parameter for each of the plurality of cells according to a common pilot channel (CPICH) quality report measured by the UE, the cell load levels of the plurality of cells, and the beam-forming capability of the UE, so as to determine a beam-forming control cell, wherein the beam direction of the UE is directed towards a base station antenna of the beam-forming control cell, the beam-forming control cell being a cell which has an optimal cell balancing parameter among the plurality of cells, wherein for two of the plurality of cells referred to as Cell a and Cell b, the calculating step calculates a relative cell balancing parameter of the Cell a with respect to the Cell b as follows: wherein CSO is a cell specific offset, wherein USO is an absolute EU specific offset, wherein Q a represents the CPICH quality of the Cell a, Q b represents the CPICH quality of the Cell b, CSO a represents the CSO of the Cell a, and CSO b represents the CSO of the Cell b, sign represents “+/−”, min represents that a minimum value is taken, X represents a multiplication operator, and abs represents that an absolute value is taken.