Patent ID: 8953467
Filing Date: 2015-02-10
Classification: H04B,H04L,H04W

Abstract:
1. A method comprising: transmitting to a user equipment in a first subframe of a radio frame on at least one downlink shared channel according to a first relay-transmission mode; switching to a second relay-transmission mode within the radio frame based on a channel quality of the downlink shared channel; after switching, transmitting to the user equipment in a subsequent subframe of the radio frame on the at least one downlink shared channel according to the second relay-transmission mode; and for the case of a packet re-transmission according to the second relay-transmission mode, re-transmitting the packet to the user equipment in a pre-determined manner so as to be concurrent with transmission of a same packet from a relay node; wherein transmitting in the first subframe comprises transmitting a common reference signal on the at least one downlink shared channel with no dedicated reference signal according to the first relay-transmission mode; and transmitting in the subsequent subframe comprises transmitting a dedicated reference signal on the at least one downlink shared channel according to the second relay-transmission mode.