Link adaptation in a wireless telecommunications system

摘要

The invention relates to control of link resources in a wireless telecommunications system, in which instant channel feedback information is transmitted from a mobile terminal in response to receipt of a selection message from a basestation, and the instant channel feedback information is used for real-time resource allocation and adaptation at the basestation. The feedback information includes channel quality information derived from pilot signals and from pre-allocated transmission weights.

主权项

1. A method of controlling link resources in a wireless telecommunications system, the link resources being provided by a basestation of the system for enabling communication from the basestation to a plurality of mobile terminals, the method comprising:
selecting a subset of mobile terminals from the plurality of mobile terminals communicating with the basestation; pre-allocating link resources to the mobile terminals in the selected subset of mobile terminals; determining transmission weights for each of the mobile terminals in the subset of mobile terminals; sending respective selection messages to the mobile terminals in the subset of mobile terminals, each selection message including pre-allocation information for the mobile terminal concerned, and being transmitted in the form of a dedicated pilot signal using the determined transmission weights for the mobile terminal concerned; obtaining feedback information from the mobile terminals in the selected subset, such feedback information being supplied in response to reception of a selection message, the feedback information including channel interference information; performing transmission mode adaptation for the mobile terminals in the selected subset in dependence upon the obtained feedback information.