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US 6,463,274 B1Granted
Multiple class of service determination for digital cellular telephones
AssigneeDenso Corporation
InventorDan Robertson
Life of this patent
Estimating the term…
Abstract
Digital cellular telephone with a variable rate vocoder is used with a number of different classes of service. A first class of service provides always constant bit rate to the telephone. A second class of service is the variable bit rate which changes the class of service depending on the traffic on the system. A third class of service is always-degraded service at a presumable lower price.
Claims4
A method of operating a cellular telephone system, comprising:
- establishing at least first and second classes of service;
- providing constant bit rate service to said first class of service;
- and
- providing variable rate service to said second class of service, wherein said variable rate service provides better service when the system is less busy, and degraded service when the system becomes more busy;
- requesting a user-selectable one-time increase in class of service, and providing said constant bit rate service after said one-time increase is requested, such that a higher quality of service is provided;
- and
- billing for said first and second class of services, a billing for said first class of service being at a higher rate than a billing for said second class of service.
4 more elements
A cellular telephone system comprising:
- a cellular handset having a multiple rate vocoder;
- and
- a controller for said cellular handset, said controller controlling said cellular handset to operate in a first mode in which constant bit rate service is available at all times for a first class of service, and in a second mode in which variable rate service is provided depending an amount of traffic on said system, the controller, responsive to a user request, to request a one-time increase in class of service to the constant bit rate service, such that a higher quality of service is provided.
Dependencies are inferred from the claim text.