Patent ID: 7778342
Filing Date: 2010-08-17
Classification: H04B,H04L,H04W

Abstract:
1. A communication method for use in a communication network involving several user terminals communicating with at least one transmitter node, said transmitter node comprising a plurality of antennas, each of said user terminals comprising at least one antenna, said method comprising; selecting a first set of user terminals comprising at least one user terminal; selecting a second set of user terminals not comprised in the first set; adapting first physical layer communication parameters for the first set of user terminals according to a first principle suitable for optimizing communication with the first set of user terminals; adapting second physical layer communication parameters, different from the first physical layer communications parameters, for the second set of user terminals according to a second principle, which is different from the first principle, in response to the first physical layer communication parameters for the first set; and transmitting to the first set of user terminals according to the first physical layer communication parameters and to the second set of user terminals according to the second physical layer communication parameters, wherein the first principle involves optimization with respect to full or partial Channel State Information (CSI), for example by Singular Value Decomposition (SVD), and the second principle makes use of opportunistic MIMO communication.