Method of reducing blocking for cellular phones
AssigneeGeneral Motors Corporation
InventorSteven P. Schwinke
Life of this patent
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Abstract
The invention provides a method of bypassing a blocked voice channel of a mobile phone system. A call request is initiated from a mobile phone. A plurality of control channels of a first carrier is scanned, and the signal strength of each control channel is measured. Service access on the strongest control channel of the first carrier is requested. If a blocked signal indicating no availability of a voice channel on the strongest control channel of the first carrier is received, then a second strongest control channel of the first carrier is selected and service access on the second control channel is requested.
Claims24
A method of bypassing a blocked voice channel of a mobile phone system comprising:
- initiating a call request from a mobile phone;
- scanning a plurality of control channels of a first carrier;
- measuring a signal strength of the control channel;
- requesting service access on a first control channel of the first carrier based on the signal strength;
- receiving a blocked signal indicating no availability of a voice channel on the first control channel of the first carrier;
- selecting a second control channel of the first carrier in response to the blocked signal, based on the signal strength;
- and
- requesting service access on the second control channel of the first carrier.
3 The method of claim 2 wherein the analog cellular phone system operates within a prescribed band between nominally 824.04 MHz and 893.97 MHz.
A computer usable medium including a program for bypassing a blocked voice channel of a mobile phone system, comprising:
- computer program code for initiating a call request from a mobile phone;
- computer program code for scanning a plurality of control channels of a first carrier;
- computer program code for measuring a signal strength of the control channel;
- computer program code for requesting service access on a first control channel of the first carrier based on the signal strength;
- computer program code for receiving a blocked signal indicating no availability of a voice channel on the first control channel of the first carrier;
- computer program code for selecting a second control channel of the first carrier in response to the blocked signal, based on the signal strength;
- and
- computer program code for requesting service access on the second control channel of the first carrier.
A blocked voice channel bypassing system comprising:
- means for initiating a call request from a mobile phone;
- means for scanning a plurality of control channels of a first carrier;
- means for measuring a signal strength of the control channel;
- means for requesting service access on a first control channel of the first carrier based on the signal strength;
- means for receiving a blocked signal indicating no availability of a voice channel on the first control channel of the first carrier;
- means for selecting a second control channel of the first carrier in response to the blocked signal, based on the signal strength;
- and
- means for requesting service access on the second control channel of the first carrier.
Dependencies are inferred from the claim text.