METHOD AND ARRANGEMENTS IN A TELECOMMUNICATION SYSTEM

摘要

The present invention relates to a method and arrangements in a communication system for Multi User Multiple-Input-Multiple-Output (MU-MIMO) signaling via Multiple-Input-Multiple-Output (MIMO) antennas between a base station and one of a plurality of mobile terminals supporting both Single User and Multi User Multiple-Input-Multiple-Output (SU-MIMO and MU-MIMO) signaling modes. Switching between the modes is supported in the system and the modes have partly shared signaling. SU-MIMO mode signaling which is redundant, i.e. not needed, for MU-MIMO mode signaling is identified. Bits, i.e. data bits, of the identified redundant signaling is re-interpreted or re-defined to comprise signaling information associated with MU-MIMO mode. The signaling information associated with MU-MIMO mode is signaled to the mobile terminal by using the reinterpreted redundant bits.

主权项

1. A method of signaling a mobile terminal from a base station, the mobile terminal being operable in Single User Multiple-Input-Multiple-Output (SU-MIMO) mode and Multi User Multiple-Input-Multiple-Output (MU-MIMO) mode, the method comprising:
identifying a subset of SU-MIMO signaling bits associated with SU-MIMO signaling that is not needed in the MU-MIMO mode; redefining the subset of SU-MIMO signaling bits to be associated with MU-MIMO signaling; informing the UE about the redefinition of the subset of SU-MIMO signaling bits; and signaling the mobile terminal in the MU-MIMO mode using MU-MIMO signaling bits, the MU-MIMO signaling bits comprising the redefined subset of SU-MIMO signaling bits.