Cellular radio system
First Claim
1. A method of operating a cellular radio system comprising a plurality of geographically separate base stations distributed so as to define a plurality of contiguous radio cells, means for enabling the base stations to communicate with each other, and at least one network controller for controlling a group of the base stations, the method comprising the steps of:
- establishing two way communication between a mobile in one of said cells and the base station of said one cell;
forming a subset of said cells adjacent to the one cell; and
requesting the base stations of said subset to reserve a channel for the communication in anticipation of handing over the communication with the mobile to one of the base stations of said subset, the handover being in response to signal quality parameters becoming unacceptable, said requesting occurring prior to the signal quality parameters becoming unacceptable.
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Accused Products
Abstract
A cellular radio system in which a base station (BS1) establishing two way communication with a mobile (10) requests base stations (BS2 to BS7) of a subset of adjacent cells to reserve a channel so that in the event of handover to a base station in one of these cells this can be executed quicker than if the reservation had not been made. In making the request for reservation, the communicating base station (BS1) passes on details of the call-in-progress. Once call has been handed over a new subset of adjacent cells is created.
130 Citations
12 Claims
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1. A method of operating a cellular radio system comprising a plurality of geographically separate base stations distributed so as to define a plurality of contiguous radio cells, means for enabling the base stations to communicate with each other, and at least one network controller for controlling a group of the base stations, the method comprising the steps of:
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establishing two way communication between a mobile in one of said cells and the base station of said one cell; forming a subset of said cells adjacent to the one cell; and requesting the base stations of said subset to reserve a channel for the communication in anticipation of handing over the communication with the mobile to one of the base stations of said subset, the handover being in response to signal quality parameters becoming unacceptable, said requesting occurring prior to the signal quality parameters becoming unacceptable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for speeding up handover of a communication between a mobile station and a first base station to an adjacent base station comprising:
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reserving a communication channel in each of a plurality of base stations adjacent to the first base station; and handing over the communication to a selected one of the plurality of base stations on the reserved communication channel when communication with the first base station is unacceptable, said reserving step occurring prior to the communication becoming unacceptable.
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Specification