SELECTION OF THE MOST EFFICIENT STATUS REPORT IN THE ARQ-MECHANISM OF A RADIO LINK LAYER, E.G. TO REDUCE THE AMOUNT OF BITS TO BE SENT AND/OR THE AMOUNT OF PROCESSING

摘要

A mobile terminal for use with a base station or RNC of a telecommunications system and a base station or RNC for use with the terminal; the terminal having a protocol being used for communication between the two; which by a number of different methods of signalling information about errors in the data; and the terminal and base station or RNC being arranged to analyse the information to determine an efficiency of the signalling methods for that information; and selected according to their efficiencies; one or more of the signalling methods to send the information to the base station or RNC. In an embodiment, one of the three SUFI-possibilities for STATUS report in the radio link layer of UMTS, being BITMAP, LIST and RLIST, is selected by using either a Viterbi algorithm or a Greedy algorithm. For the Viterbi algorithm, several states are specified for each of the three possibilities, and also the costs associated with each state transition. The idea of the Greedy algorithm is to determine an amount of distance between consecutive errors, and comparing this distance with a threshold.