Preparation phase for switching between SU-MIMO and MU-MIMO

摘要

The present invention relates to a method and arrangement for switching between different modes in a communications network. The network comprises a number of transmit and a number of receive antennas, said modes comprising a single user mode and a multiple user mode. The method including the steps of: transmitting reference signals or predetermined sequences corresponding to both said modes comprising respective weighting matrices for said modes during a preparation phase, which comprises of one or more transmission time intervals (TTI), transmitting on a common channel, signalling information indicating start and duration of said preparation phase to all receiving equipments in a reception area.

主权项

1. A method in a base station for switching between different MIMO-transmission modes in a communications network, said network comprising a number of transmit antennas and a number of receive antennas, said modes comprising a single-user mode and a multi-user mode, comprising the steps of:
transmitting on a common or shared channel signalling information including at least an indication of the start of a preparation phase, wherein said preparation phase is related to switching between the single user-mode and the multi user-mode, wherein said signalling information is transmitted to all receiving user equipments in a reception area; and transmitting reference signals corresponding to both said MIMO-transmission modes with respective weighting matrices for the modes during said preparation phase for switching between the single user-mode and the multi user-mode comprising of one or more transmission time intervals (TTI).