Method and apparatus for providing adaptive modulation in a radio communication system
AssigneeMotorola, Inc.
InventorsMichael L. Needham, Kenneth J. Crisler, Stephen S. Gilbert
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Abstract
A method for providing adaptive modulation in a radio communication system employs a plurality of data modulation techniques (207). A two-way communication unit (100) automatically selects (318) from amongst the plurality of data modulation techniques (207), and uses the selected data modulation technique to transmit (308) data.
Claims12
A method of adaptively selecting from amongst a plurality of data modulation techniques to use when transmitting data comprising the steps of:
- in a two-way communication unit:
- transmitting data using a first data modulation technique of said plurality of data modulation techniques;
- receiving a message that includes information that at least reflects upon quality of transmission of the data;
- automatically selecting, as a function of both the information that at least reflects upon quality of transmission of the data and previously stored information that reflects upon quality of previous transmissions of data, a second data modulation technique from said plurality of data modulation techniques;
- and
- using the second data modulation technique for subsequent transmissions of data.
A method of adaptively selecting from amongst at least two data modulation techniques to use when transmitting data, comprising the steps of:
- in a first two-way communication unit:
- maintaining stored information regarding quality of previous transmissions of data;
- transmitting to a second two-way communication unit at least one block of data using a first data modulation technique from said at least two modulation techniques;
- receiving from the second two-way communication unit at least a selective automatic-repeat-request feedback message;
- automatically selecting, as a function of both information contained in the selective automatic-repeat-request feedback message and the stored information, a second data modulation technique from said at least two data modulation techniques;
- updating the stored information to include at least some of the information contained in the selective automatic-repeat-request feedback message;
- and
- using the second data modulation technique for subsequent transmissions of data.
Dependencies are inferred from the claim text.