METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNEL BY BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM

• US 20140177561A1
• Filed: 12/23/2013
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yu, Hyun-Kyu, Kim, Tae-Young, Park, Jeong-Ho, Jeong, Cheol
• Granted Patent: US 9,750,003 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method and apparatus for transmitting and receiving a control channel by beamforming in a wireless communication system are provided. The transmission method includes determining a plurality of pieces of control information to be transmitted on control channels and determining transmission beams for use in beamforming transmission of the plurality of pieces of control information, mapping at least one piece of beam region information indicating at least one beam region in a control channel region and the plurality of pieces of control information to the at least one beam region in the control channel region, at least one piece of control information corresponding to the same transmission beam being arranged in one beam region, and transmitting the mapped beam region information and the mapped control information by transmission beams corresponding to the beam regions in the control channel region.

Claims

1. A method for transmitting a control channel by beamforming in a wireless communication system, the method comprising:

determining a plurality of pieces of control information to be transmitted on control channels and determining transmission beams for use in beamforming transmission of the plurality of pieces of control information;

mapping at least one piece of beam region information indicating at least one beam region in a control channel region and the plurality of pieces of control information into the at least one beam region in the control channel region, at least one piece of control information corresponding to a same transmission beam from among the plurality of pieces of control information being arranged in one beam region in the control channel region; and

transmitting the at least one piece of mapped beam region information and the plurality of pieces of mapped control information by a transmission beam corresponding to each of the at least one beam region in the control channel region.

2. The method of claim 1, wherein each of the at least one piece of beam region information includes:

information about at least one of a size of a beam region, a position of the beam region, a number of control channels included in the beam region, a type of the control channels included in the beam region, a position of the control channels included in the beam region, a size of control information transmitted on the control channels, and a Modulation and Coding Scheme (MCS) applied to the control channels.

3. The method of claim 1, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each beam region, disposed before the beam region.

4. The method of claim 3, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

5. The method of claim 1, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to the at least one beam region, arranged before the at least one beam region.

6. The method of claim 5, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

7. The method of claim 1, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam and a plurality of pieces of beam region information related to transmission beams of a Base Station (BS), arranged before the at least one beam region, and

wherein each piece of beam region information includes information indicating one of:

presence of control information allocated to a transmission beam corresponding to the beam region information and absence of control information allocated to the transmission beam corresponding to the beam region information.

8. The method of claim 1, wherein each of the at least one piece of beam region information includes a reference signal scrambled with a sequence mapped to a transmission beam corresponding to the beam region information.

9. The method of claim 1, wherein each of the at least one beam regions includes control information allocated to a beam having a narrower beamwidth than a transmission beam corresponding to the beam region.

10. A method for receiving a control channel by beamforming in a wireless communication system, the method comprising:

detecting beam region information corresponding to an intended transmission beam at at least one of predetermined resource positions in a control channel region having predetermined time-frequency resources, the control channel region including at least one beam region each carrying at least one piece of control information allocated to a same transmission beam; and

detecting intended control information in a beam region indicated by the beam region information, using the beam region information.

11. The method of claim 10, wherein the beam region information includes information about at least one of a size of the beam region, a position of the beam region, a number of control channels included in the beam region, a type of the control channels included in the beam region, a position of the control channels included in the beam region, a size of control information transmitted on the control channels, and a Modulation and Coding Scheme (MCS) applied to the control channels.

12. The method of claim 10, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each beam region, disposed before the beam region.

13. The method of claim 12, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

14. The method of claim 10, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each of the at least one beam region, arranged before the at least one beam region.

15. The method of claim 14, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

16. The method of claim 10, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam and a plurality of pieces of beam region information related to transmission beams of a Base Station (BS), arranged before the at least one beam region, and

wherein each piece of beam region information includes information indicating one of:

presence of control information allocated to a transmission beam corresponding to the beam region information and absence of control information allocated to the transmission beam corresponding to the beam region information.

17. The method of claim 10, wherein the beam region information includes a reference signal scrambled with a sequence mapped to the transmission beam corresponding to the beam region information.

18. The method of claim 10, wherein each of the at least one beam region includes control information allocated to a beam having a narrower beamwidth than a transmission beam corresponding to the beam region.

19. A base station for transmitting a control channel by beamforming in a wireless communication system, the base station comprising:

a control channel generator configured to determine a plurality of pieces of control information to be transmitted on control channels;

a controller configured to determine transmission beams for use in beamforming transmission of the plurality of pieces of control information and to map at least one piece of beam region information indicating at least one piece of beam region in a control channel region and the plurality of pieces of control information into beam regions in the control channel region, at least one piece of control information corresponding to a same transmission beam from among the plurality of pieces of control information being arranged in one beam region in the control channel region; and

a transmitter configured to transmit the at least one piece of mapped beam region information and the plurality of pieces of mapped control information by a transmission beam corresponding to each of the at least one beam region in the control channel region.

20. The base station of claim 19, wherein each of the at least one piece of beam region information includes information about at least one of a size of a beam region, a position of the beam region, a number of control channels included in the beam region, a type of the control channels included in the beam region, a position of the control channels included in the beam region, a size of control information transmitted on the control channels, and a Modulation and Coding Scheme (MCS) applied to the control channels.

21. The base station of claim 19, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each beam region, disposed before the beam region.

22. The base station of claim 21, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

23. The base station of claim 19, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to the at least one beam region, arranged before the at least one beam region.

24. The base station of claim 23, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

25. The base station of claim 19, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam and a plurality of pieces of beam region information related to transmission beams of a Base Station (BS), arranged before the at least one beam region, and

wherein each piece of beam region information includes information indicating one of:

presence of control information allocated to a transmission beam corresponding to the beam region information and absence of control information allocated to the transmission beam corresponding to the beam region information.

26. The base station of claim 19, wherein each of the at least one piece of beam region information includes a reference signal scrambled with a sequence mapped to a transmission beam corresponding to the beam region information.

27. The base station of claim 19, wherein each of the at least one beam regions includes control information allocated to a beam having a narrower beamwidth than a transmission beam corresponding to the beam region.

28. A mobile station for receiving a control channel by beamforming in a wireless communication system, the mobile station comprising:

a receiver configured to receive a signal in a control channel region having predetermined time-frequency resources; and

a control channel detector configured to detect beam region information corresponding to an intended transmission beam at at least one of predetermined resource positions from the signal received in the control channel region, the control channel region including at least one beam region each carrying at least one piece of control information allocated to a same transmission beam, and to detect intended control information in a beam region indicated by the beam region information, using the beam region information.

29. The mobile station of claim 28, wherein the beam region information includes information about at least one of a size of the beam region, a position of the beam region, a number of control channels included in the beam region, a type of the control channels included in the beam region, a position of the control channels included in the beam region, a size of control information transmitted on the control channels, and a Modulation and Coding Scheme (MCS) applied to the control channels.

30. The mobile station of claim 28, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each beam region, disposed before the beam region.

31. The mobile station of claim 30, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

32. The mobile station of claim 28, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam, and at least one piece of beam region information related to each of the at least one beam region, arranged before the at least one beam region.

33. The mobile station of claim 32, wherein the at least one piece of beam region information is arranged in a same order of the at least one beam region.

34. The mobile station of claim 28, wherein the control channel region includes at least one beam region each including at least one piece of control information allocated to the same transmission beam and a plurality of pieces of beam region information related to transmission beams of a Base Station (BS), arranged before the at least one beam region, and

wherein each piece of beam region information includes information indicating one of:

presence of control information allocated to a transmission beam corresponding to the beam region information and absence of control information allocated to the transmission beam corresponding to the beam region information.

35. The mobile station of claim 28, wherein the beam region information includes a reference signal scrambled with a sequence mapped to the transmission beam corresponding to the beam region information.

36. The mobile station of claim 28, wherein each of the at least one beam region includes control information allocated to a beam having a narrower beamwidth than a transmission beam corresponding to the beam region.