Resource sharing in relay operations within wireless communication systems
A wireless communication base station is disclosed. The base station includes a transceiver coupled to a controller configured to generate a sub-frame having first control region for a first set of users and a second control region for a second set of users that do not receive the first control region, the first control region has a fixed starting location within the sub-frame and the second control region has a starting location that is one of several possible starting locations within the sub-frame, wherein the controller is configured to cause the transceiver to transmit the sub-frame to the first and second sets of users without signaling the starting location of the second control region in the sub-frame.
1. A wireless communication relay terminal comprising:
a transceiver,
a controller coupled to the transceiver,
the controller configured to cause the transceiver to transmit a first portion of a first sub-frame during a first time-frequency region to a wireless communication device,
the controller configured to cause the transceiver to receive, from a base station, a portion of a second sub-frame during a second time-frequency region wherein the first and second time-frequency regions are non-overlapping,
the controller configured to detect a control region within the portion of the second sub-frame received from the base station by attempting to decode information in a possible control region of the second sub-frame, the possible control region having at least one of several possible starting time locations that are known a priori by the relay terminal.
2. The relay terminal of claim 1 , the controller configured to cause the transceiver to receive, from the base station, the portion of the second sub-frame during the second time-frequency region wherein the first and second time-frequency regions are separated by a time interval.
3. The relay terminal of claim 2 , the time interval separation of the first and second time-frequency regions is an integer number of OFDM symbols.
4. The relay terminal of claim 2 , the time interval separation of the first and second time-frequency regions is an integer number of time units.
5. The relay terminal of claim 1 , the controller configured to detect the control region within the portion of the second sub-frame received by attempting to decode information in the possible control region having a dimension that is known a priori by the relay terminal.
6. The relay terminal of claim 1 , the first portion of the first sub-frame includes a physical downlink control channel.
7. The relay terminal of claim 1 , the first sub-frame is a non-unicast sub-frame.
8. The relay terminal of claim 1 , the first sub-frame is a multimedia broadcast multicast over a single frequency network sub-frame.
9. The relay terminal of claim 1 , the relay terminal decodes the possible control region in a time interval non-overlapping a time interval corresponding to a first control region of the first sub-frame.
10. The relay terminal of claim 1 , the first and second sub-frames are separate from a sub-frame containing a paging channel transmitted by the relay terminal.
11. The relay terminal of claim 1 , the first portion of the first sub-frame includes a first control region having scheduling messages.
12. The relay terminal of claim 1 , the portion of the second sub-frame includes a second control region corresponding to the possible control region having scheduling messages.
13. The relay terminal of claim 12 , the portion of the second sub-frame includes a data region that is distinct in time-frequency from the second control region.