Patent ID: 8995375
Filing Date: 2015-03-31
Classification: H04W

Abstract:
1. A method for sending control messages from one or more nodes in a wireless communication network to a wireless communication device comprising: sending a reconfiguration message to the device using an existing downlink control channel configuration for the device, said reconfiguration message indicating a new downlink control channel configuration for the device; and during a window of control channel configuration ambiguity that arises for the device as a consequence of sending the reconfiguration message, sending a control message to the device using the existing downlink control channel configuration and sending the same control message to the device using the new downlink control channel configuration; wherein the control message sent using the existing downlink control channel configuration is sent using a first demodulation reference signal sequence and the same control message sent using the new downlink control channel configuration is sent using a second demodulation reference signal sequence that is different than the first demodulation reference signal sequence.