Patent ID: 8547954
Filing Date: 2013-10-01
Classification: H04B,H04W

Abstract:
1. A method used in a wireless communication system, the method comprising: setting a number of transmit antenna ports for legacy User Equipment (UE) operation in the wireless communication system; setting a different number of transmit antenna ports for new UE operation in the wireless communication system; advertising transmit antenna ports for the legacy UE operation and transmit antenna ports for the new UE operation in the wireless communication system; transmitting all control channels for legacy and new UEs via the transmit antenna ports for the legacy UE operation; and transmitting first reference signals via the transmit antenna ports for the legacy UE operation and second reference signals via the transmit antenna ports for the new UE operation; wherein the first reference signals are transmitted in all subframes; wherein the second reference signals are transmitted in a subset of all the subframes based at least in part on a subframe configuration.