Method and apparatus for call recovery in a wireless communication system
First Claim
1. In a wireless communication system having a plurality of base stations, each of the plurality of base stations having a neighbor set comprising neighboring base stations, each of the neighboring base stations having a default channel, a method comprising:
- transmitting default channel information to a mobile station;
detecting occurrence of a call recovery trigger; and
instructing all base stations in the neighbor set to transmit on respective default channels.
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Accused Products
Abstract
A method and apparatus for call recovery in a wireless communication system (10). When the communication link between a mobile station (38) and a base station (32) is in trouble, the mobile station and the infrastructure prearrange potential rescue base stations (34). The source cell base station contacts all recovery-capable neighbors as potential rescuers. Each rescue base station is instructed to use a default channel for rescue transmissions. The rescue transmission is considered a call recovery operation. The mobile station establishes a soft hand-off with rescue base station, wherein the FL uses the default channel and an alternate channel. Once hand-off is complete the rescue base station discontinues use of the default channel. In one embodiment, the source cell base station provides the mobile station with the list of recovery-capable neighbors as overhead during transmissions and prior to development of the communication link problem.
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Citations
20 Claims
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1. In a wireless communication system having a plurality of base stations, each of the plurality of base stations having a neighbor set comprising neighboring base stations, each of the neighboring base stations having a default channel, a method comprising:
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transmitting default channel information to a mobile station;
detecting occurrence of a call recovery trigger; and
instructing all base stations in the neighbor set to transmit on respective default channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 19, 20)
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13. A wireless apparatus, comprising:
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an antenna;
a processor coupled to the antenna;
transmit circuitry coupled to the antenna and the processor;
receiver circuitry coupled to the antenna and the processor;
a first set of computer readable instructions executable by the processor to receive a list of neighbors for a base station, the list including default channel assignments for each of the neighbors;
a second set of computer readable instructions executable by the processor to identify a call recovery trigger and disable a transmit circuitry in response; and
a third set of computer readable instructions executable by the processor to establish hand-off with at least one of the neighbors.
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14. A wireless apparatus, comprising:
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a transmitter circuit;
a recovery adjust unit operative subsequent to a call recovery operation to generate a predetermined power control instruction; and
a power adjust unit coupled to the recovery adjust unit and the transmitter circuit, the power adjust unit operative to adjust the transmitter circuit in response to the power control instruction.
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18. A computer program embodied on a computer-readable medium containing computer-executable instructions, the program comprising:
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A first set of instructions operative to identify a special event;
A second set of instructions operative to disable call recovery during the special event; and
A third set of instructions operative to notify a wireless communication system of the special event.
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Specification