Patent ID: 7313737
Filing Date: 2007-12-25
Classification: H04L

Abstract:
1. An adaptive link adaptation method for a packet data enabled mobile telecommunication network, the method comprising: transmitting data packets over at least one radio link, at least one packet coded using a given coding scheme selected from a group of at least three predetermined coding schemes, wherein the packet data enabled mobile telecommunication network comprises a cell comprising a base station and at least one mobile terminal, the at least one mobile terminal linked to the base station by radio links, at least one radio link having variable channel quality; accumulating statistical data comprising periodically provided channel quality estimates, periodically provided information about amounts of at least one of successfully received data packets and unsuccessfully received data packets, and periodically provided information about the used coding schemes by storing entries indicating the accumulated information about the amounts of the at least one of the successfully received data packets and the unsuccessfully received data packets and the entries indexed according to the coding schemes and channel quality estimates; determining block error rates for at least one coding scheme based on the accumulated statistical data, at least one block error rate comprising a function of coding scheme and channel quality estimate; and selecting, from the group of the at least three predetermined coding schemes, a coding scheme with a best performance for a current data packet to be transmitted over a given radio link with a current channel quality based on the determined block error rates.