Method of using link adaptation and power control for streaming services in wireless networks
First Claim
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1. A method of providing streaming service in a wireless packet network comprising steps of:
- utilizing a link adaptation technique to adapt a modulation and coding level to achieve a predetermined error rate for transmission of data packets, said link adaptation technique based on a relationship between said error rate and a signal-to-interference-plus-noise ratio, wherein said signal-to-interference-plus-noise ratio is predicted from a signal path gain, a maximum transmission power level, and a predicted interference power level;
utilizing a power control technique to adjust a transmission power to a level which provides desirable performance, said power control technique utilized in combination with said link adaptation technique and based on the adapted modulation and the coding level; and
transmitting said packets of data in accordance with said modulation and said coding level and with said transmission power.
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Abstract
A method for improving the performance for a streaming service by link-adaptation and power-control in a wireless packet network such as an Enhanced General Packet Radio Services (EGPRS) cellular network is described. In particular, the effects of a combined link adaptation and power control scheme (referred to as an error-based scheme) for achieving a target error rate, which is non-zero but low enough so that limited retransmission and error concealment techniques are effective, is presented.
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12 Claims
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1. A method of providing streaming service in a wireless packet network comprising steps of:
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utilizing a link adaptation technique to adapt a modulation and coding level to achieve a predetermined error rate for transmission of data packets, said link adaptation technique based on a relationship between said error rate and a signal-to-interference-plus-noise ratio, wherein said signal-to-interference-plus-noise ratio is predicted from a signal path gain, a maximum transmission power level, and a predicted interference power level; utilizing a power control technique to adjust a transmission power to a level which provides desirable performance, said power control technique utilized in combination with said link adaptation technique and based on the adapted modulation and the coding level; and transmitting said packets of data in accordance with said modulation and said coding level and with said transmission power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification