Methods and apparatus for selecting a base station transceiver system based on service communication type
View Patent ↗Techniques for use in selecting a base station transceiver system for communication with a mobile station are described. The mobile station is connected to a first base station transceiver system, and scans to identify a second base station transceiver system for communication. The mobile station further identifies that the second base station transceiver system provides a predetermined communication service, and that the first base station transceiver system fails to provide the predetermined communication service. In response to identifying, the mobile station causes the second base station transceiver system to be selected for communication over the first base station transceiver system even if the signal quality of the second base station transceiver system is worse than that of the first base station transceiver system. Identifying whether the first and second base station transceiver system provide the predetermined communication service is based on parameters transmitted from the first and second base station transceiver systems.
1. In a mobile station connected to a first cellular base station transceiver system, a method of selecting a cellular base station transceiver system for communication with the mobile station, the method comprising:
scanning to identify a second cellular base station transceiver stem for communication;
identifying, at the mobile station, that the second cellular base station transceiver system provides a predetermined communication service, and that the first cellular base station transceiver system fails to provide the predetermined communication service; and
in response to the identifying, causing the second cellular base station transceiver system to be selected for communication over the first cellular base station transceiver system when a signal quality of the second cellular base station transceiver system is above a threshold signal quality;
wherein identifying whether the first cellular base station transceiver system fails to provide the predetermined communication service is based on identifying a parameter transmitted by the first cellular base station transceiver system.
2. The method of claim 1 , wherein the predetermined communication service comprises a Third Generation (3G) communication service.
3. The method of claim 1 , wherein the act of identifying Whether the first and second cellular base station transceiver systems provide a predetermined communication service further comprises identifying Whether an extended channel list message is transmitted from the first and the second cellular base station transceiver systems.
4. The method of claim 1 , wherein causing the second cellular base station transceiver system to be selected for communication over the first cellular base station transceiver system further comprises producing and sending a list of handoff candidate identifiers which includes a second identifier for the second cellular base station transceiver system but excludes a first identifier for the first cellular base station transceiver system.
5. The method of claim 1 , wherein the signal quality is based on an energy-to-interference ratio (EC/IO), the method further comprising:
measuring, from the scanning, a first EC/IO of the first cellular base station transceiver system; and
measuring, from the scanning, a second EC/IO of the second cellular base station transceiver system.
6. The method of claim 1 , wherein the predetermined communication service comprises a Fourth Generation (4G) communication service.
7. The method of claim 1 , wherein the predetermined communication service comprises a voice communication service.
8. The method of claim 1 , wherein the predetermined communication service comprises a GERAN communication service.
9. A mobile station comprising:
a controller;
a radio frequency (RF) transceiver coupled to the controller;
the controller being configured to:
scan, with use of the RF transceiver, to identify a second cellular base station transceiver system for communication;
identify that the second cellular base station transceiver system provides a predetermined communication service, and that the first cellular base station transceiver system fails to provide the predetermined communication service; and
in response to the identifying, cause the second cellular base station transceiver system to be selected for communication over the first cellular base station transceiver system when a signal quality of the second cellular base station transceiver system is above a threshold signed quality;
wherein identifying whether the first cellular base station transceiver system fails to provide a predetermined communication service is based on identifying a parameter transmitted by the first cellular base station transceiver system.
10. The mobile station of claim 9 , wherein the predetermined communication service comprises a Third Generation (3G) communication service.
11. The mobile station of claim 9 , wherein the controller is further configured to identify whether the first and second cellular base station transceiver systems provide a predetermined communication service by identifying whether an extended channel list message is transmitted from the first and the second cellular base station transceiver systems.
12. The mobile station of claim 9 , wherein the controller is configured to cause the second cellular base station transceiver system to be selected for communication over the first cellular base station transceiver system by producing and sending a list of handoff candidate identifiers which includes a second identifier for the second cellular base station transceiver system but excludes a first identifier for the first cellular base station transceiver system.
13. The mobile station of claim 9 , wherein the predetermined communication service comprises a voice communication service.
14. The mobile station of claim 9 , wherein the predetermined communication service comprises a GERAN communication service.
15. A communication system, comprising:
a first cellular base station transceiver system;
a second cellular base station transceiver system;
one or more mobile stations operative for communications via the first and the second cellular base station transceiver system;
each mobile station being configured to:
scan to identify a second cellular base station transceiver system for communication;
identify that the second cellular base station transceiver system provides a predetermined communication service, and that the first cellular base station transceiver system fails to provide the predetermined communication service; and
in response to the identifying, cause the second cellular base station transceiver system to be selected for communication over the first cellular base station transceiver system when a signal quality of the second cellular base station transceiver system is above a threshold signal quality;
wherein identifying whether the first cellular base station transceiver system fails to provide a predetermined communication service is based on identifying a parameter transmitted by the first cellular base station transceiver systems.
16. The communication system of claim 15 , wherein the predetermined communication service comprises a Third Generation (3G) communication service.
17. The communication system of claim 15 , wherein the predetermined communication service comprises a voice communication service.
18. The communication system of claim 15 , wherein the predetermined communication service comprises a GERAN communication service.