System and method for data channel transmission and reception

• US 9,602,255 B2
• Filed: 10/12/2012
• Issued: 03/21/2017
• Est. Priority Date: 10/13/2011
• Status: Active Grant

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Sartori, Philippe, Soong, Anthony C. K., Berggren, Fredrik
• Primary Examiner(s): Hsu, Alpus H
• Assistant Examiner(s): Thai, Camquyen
• Application Number:
  US13/651,111
• Publication Number:
  US 20130094458A1
• Time in Patent Office: 1,621 Days
• Field of Search: 370/328, 370/336, 370/329, 370/204, 370/330, 370/431, 370/450, 370/451, 455/434, 455/450, 455/522
• US Class Current: 1/1
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method for operating a communications controller includes allocating a number of resource blocks to an enhanced physical downlink shared channel (ePDSCH), and identifying a starting point for the resource blocks of the ePDSCH, the starting point located within a control region of a subframe. The method also includes signaling to a user equipment (UE) the starting point of the resource blocks and the number of resource blocks allocated to the ePDSCH.

Claims

1. A method for operating a communications controller, the method comprising:

allocating, by the communications controller, a first set of resource elements within a legacy control region of a subframe to a physical downlink control channel (PDCCH);

allocating, by the communications controller, a second set of resource blocks to an enhanced physical downlink shared channel (ePDSCH), wherein the resource blocks comprise respective resource elements;

allocating, by the communications controller, a third set of resource blocks to an enhanced physical downlink control channel (ePDCCH), wherein the third set of resource blocks comprises resource elements of a data region of the subframe, and wherein the ePDCCH has a first starting point;

allocating, by the communications controller, a fourth set of resource blocks within the data region to a physical downlink shared channel (PDSCH);

identifying, by the communications controller, a starting point for the respective resource elements of the second set of resource blocks of the ePDSCH, the starting point of the ePDSCH located within the legacy control region and overlapping in time with control channel information in the legacy control region, wherein the first starting point of the ePDCCH is located within the legacy control region, and wherein the starting point of the ePDSCH is after the first starting point of the ePDCCH; and

signaling, by the communications controller, to a user equipment (UE), the starting point and a number of the resource blocks allocated to the ePDSCH.

2. The method of claim 1, further comprising signaling the starting point in a state of an indicator of a control channel, the state unused in indicating other information.

3. The method of claim 2, wherein the control channel is a physical control format indicator channel.

4. The method of claim 1, further comprising signaling the starting point in a state of a radio resource control parameter, the state unused in indicating other information.

5. The method of claim 4, wherein the radio resource control parameter is a pdsch-start parameter.

6. The method of claim 1, further comprising signaling the starting point in a common search space of a control channel.

7. The method of claim 6, wherein the control channel comprises one of the PDCCH and the ePDCCH.

8. The method of claim 1, further comprising signaling the starting point in a grant of the ePDSCH.

9. The method of claim 1, further comprising signaling the number of the resource blocks allocated to the ePDSCH on an enhanced physical downlink control channel.

10. The method of claim 1, wherein the legacy control region is a Third Generation Partnership Project (3PP) Long Term Evolution (LTE) Release 10 (Rel-10) control region.

11. The method of claim 1, wherein the ePDSCH is scheduled by the ePDCCH.

12. A method for operating a user equipment (UE), the method comprising:

decoding, by the UE, a physical downlink control channel (PDCCH) occupying a legacy control region of a subframe to obtain a first set of resource blocks allocated in a data region of the subframe to a physical downlink shared channel (PDSCH);

decoding, by the UE, an enhanced physical downlink control channel (ePDCCH) to obtain a second set of resource blocks allocated to an enhanced physical shared channel (ePDSCH), wherein the ePDCCH has a first starting point;

determining, by the UE, a starting point for respective resource elements of the second set of resource blocks for the ePDSCH, the starting point of the ePDSCH located in the legacy control region and overlapping in time with control channel information in the legacy control region, wherein the first starting point of the ePDCCH is located within the legacy control region, and wherein the starting point of the ePDSCH is after the first starting point of the ePDCCH; and

receiving, by the UE, the ePDSCH in accordance with the starting point and a number of the resource blocks allocated to the ePDSCH.

13. The method of claim 12, wherein determining the starting point comprises:

receiving a physical control format indicator channel with a first indicator from a communications controller; and

setting the starting point in accordance to the first indicator.

14. The method of claim 12, wherein determining the starting point comprises:

receiving a radio resource control message with a radio resource control parameter; and

setting the starting point in accordance with the radio resource control parameter.

15. The method of claim 12, wherein determining the starting point comprises:

searching for a second indicator in a common search space of a control channel; and

setting the starting point in accordance with the second indicator.

16. The method of claim 15, wherein the control channel comprises one of the PDCCH and the ePDCCH.

17. The method of claim 12, wherein determining the starting point comprises:

receiving a grant for the ePDSCH, the grant including a third indicator; and

setting the starting point in accordance with the third indicator.

18. The method of claim 12, further comprising decoding the ePDSCH in accordance with the starting point and the number of the resource blocks allocated to the ePDSCH.

19. The method of claim 12, wherein the legacy control region is a Third Generation Partnership Project (3PP) Long Term Evolution (LTE) Release 10 (Rel-10) control region.

20. The method of claim 12, wherein the ePDSCH is scheduled by the ePDCCH.

21. A communications controller comprising:

a processor configured to;

allocate a first set of resource elements within a legacy control region of a subframe to a physical downlink control channel (PDCCH),

allocate a second set of resource blocks to an enhanced physical downlink shared channel (ePDSCH), and to identify a starting point for respective resource elements of the second set of resource blocks of the ePDSCH, the starting point of the ePDSCH located within the legacy control region and overlapping in time with control channel information in the legacy control region,

allocate a third set of resource blocks within a data region of the subframe to an enhanced physical downlink control channel (ePDCCH), wherein the third set of resource blocks comprises resource elements of a data region of the subframe, wherein the ePDCCH has a first starting point, wherein the first starting point of the ePDCCH is located within the legacy control region, and wherein the starting point of the ePDSCH is after the first starting point of the ePDCCH, and

allocate a fourth set of resource blocks within the data region to a physical downlink shared channel (PDSCH); and

a transmitter operatively coupled to the processor, the transmitter configured to signal to a user equipment (UE) the starting point and a number of the resource blocks allocated to the ePDSCH.

22. The communications controller of claim 21, wherein the transmitter is configured to signal the starting point in a state of an indicator of a control channel, the state unused in indicating other information.

23. The communications controller of claim 22, wherein the control channel is a physical control format indicator channel.

24. The communications controller of claim 21, wherein the transmitter is configured to signal the starting point in a state of a radio resource control parameter, the state unused in indicating other information.

25. The communications controller of claim 24, wherein the radio resource control parameter is a pdsch-start parameter.

26. The communications controller of claim 21, wherein the transmitter is configured to signal the starting point in a common search space of a control channel.

27. The communications controller of claim 26, wherein the control channel comprises one of the PDCCH and the ePDCCH.

28. The communications controller of claim 21, wherein the transmitter is configured to signal the starting point in a grant of the ePDSCH.

29. The communications controller of claim 21, wherein the transmitter is configured to signal the number of the resource blocks allocated to the ePDSCH on an enhanced physical downlink control channel.

30. The communications controller of claim 21, wherein the legacy control region is a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) Release 10 (Rel-10) control region.

31. The communications controller of claim 21, wherein the ePDSCH is scheduled by the ePDCCH.

32. A user equipment (UE) comprising:

a processor configured to;

decode a physical downlink control channel (PDCCH) occupying a legacy control region of a subframe to obtain a first set of resource blocks within a data region of the subframe to a physical downlink shared channel (PDSCH), and

decode an enhanced physical downlink control channel (ePDCCH) to obtain a second set of resource blocks allocated to an enhanced physical shared channel (ePDSCH), and to determine a starting point for respective resource elements of the second set of resource blocks for the ePDSCH, the starting point of the ePDSCH located in the legacy control region and overlapping in time with control channel information in the legacy control region, wherein the ePDCCH has a first starting point, wherein the first starting point of the ePDCCH is located within the legacy control region, and wherein the starting point of the ePDSCH is after the first starting point of the ePDCCH; and

a receiver operatively coupled to the processor, the receiver configured to receive the ePDSCH in accordance with the starting point and a number of the resource blocks allocated to the ePDSCH.

33. The UE of claim 32, wherein the receiver is configured to receive a physical control format indicator channel with a first indicator from a communications controller, and wherein the processor is configured to set the starting point in accordance to the first indicator.

34. The UE of claim 32, wherein the receiver is configured to receive a radio resource control message with a radio resource control parameter, and wherein the processor is configured to set the starting point in accordance with the radio resource control parameter.

35. The UE of claim 32, wherein the processor is configured to search for a second indicator in a common search space of a control channel, and to set the starting point in accordance with the second indicator.

36. The UE of claim 32, wherein the receiver is configured to receive a grant for the ePDSCH, the grant including a third indicator, and wherein the processor is configured to set the starting point in accordance with the third indicator.

37. The UE of claim 32, wherein the processor is configured to decode the ePDSCH in accordance with the starting point and the number of the resource blocks allocated to the ePDSCH.

38. The UE of claim 32, wherein the legacy control region is a Third Generation Partnership Project (3PP) Long Term Evolution (LTE) Release 10 (Rel-10) control region.

39. The UE of claim 32, wherein the ePDSCH is scheduled by the ePDCCH.