US8218609B2

5G,4G,3G

Title:

Closed-loop rate control for a multi-channel communication system

Application number:

US20030448801

Family ID:

32179857

Publication Date:

10-07-2012

Application date:

31-05-2003

Priority Date:

25-10-2002

Current assignee:

QUALCOMM INC

Declaring company:

QUALCOMM INC

Abstract  Abstract

Closed-loop rate control for data transmission on multiple parallel channels is provided. An inner loop estimates the channel conditions for a communication link and selects a suitable data rate for each of the multiple parallel channels based on the channel estimates. For each parallel channel a received SNR is computed based on the channel estimates an operating SNR is computed based on the received SNR and an SNR offset for the parallel channel and the data rate is selected based on the operating SNR for the parallel channel and a set of required SNRs for a set of data rates supported by the system. An outer loop estimates the quality of data transmissions received on the multiple parallel channels and adjusts the operation of the inner loop. For example the SNR offset for each parallel channel is adjusted based on the status of packets received on that parallel channel.