Method of using link adaptation and power control for streaming services in wireless networks
AssigneeAT&T Intellectual Property II, L.P.
InventorsKin K. Leung, Kapil K. Chawla, Peter F. Driessen, Xiaoxin Qiu
Life of this patent
Estimating the term…
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.
Claims11
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 estimated by multiplying a value of a maximum transmission power level by a value of a signal path gain and dividing by a value of 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 coding level;
- and
- transmitting said packets of data in accordance with said modulation and coding level and with said transmission power.
Dependencies are inferred from the claim text.