Patent ID: 7430420
Filing Date: 2008-09-30
Classification: H04W,Y02D

Abstract:
1. A method for allocating frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to a first and a second base station, respectively, the method comprising: monitoring a radio emission parameter associated with said first and second base stations; and based on the radio emission parameter of said first and second base stations, selecting a target cell among said at least two cells for a mobile wireless device for transferring said mobile wireless device from a first frequency band to a second frequency band having a transmit power level lower than that of said first frequency band, further comprising selecting said target cell among said at least two cells based on the radio emission parameter of said first and second base stations and a radio propagation condition of at least two channels of said multiplicity of channels associated with said multi-layer access network, wherein selecting said target cell comprises selecting said target cell that provides the lowest path loss from a set of cells that guarantee a desired value of a ratio of a received pilot power from a sector to a total interference so that emission of radio transmit power from said first and second base station is reduced upon an initial access of said target cell by said mobile wireless device; selecting said target cell among said at least two cells based on the radio emission parameter of said first and second base stations and a radio propagation condition of at least two channels of said multiplicity of channels associated with said multi-layer access network; selecting said target cell as a cell with a lowest path loss and a cell that fulfils at least one of a cell selection criterion and cell reselection criterion; executing instructions at said mobile wireless device to reduce the emission of radio transmit power from said first and second base stations, wherein executing instructions at said mobile wireless device further comprises: measuring a ratio of a received pilot power from a sector to a total interference defined as the sum of received power from one or more other sectors and a thermal noise of said at least two cells; measuring received signal code power of a common pilot channel of said at least two cells; determining a pilot power for said common pilot channel of said at least two cells; and calculating the path loss of each cell of said at least two cells based on the corresponding pilot powers.