METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION BASED ON SPATIAL-MULTIPLEXING GAIN

• US 20110249633A1
• Filed: 01/03/2011
• Published: 10/13/2011
• Est. Priority Date: 04/07/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: JUNG, Young Ho, LEE, In Ho, CLERCKX, Bruno, JI, Hyoung Ju, HAN, Jin Kyu, CHO, Joon Young, HONG, Young Jun
• Granted Patent: US 8,520,619 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• 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 control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined.

Claims

1. A transmission method, comprising:

allocating resource blocks (RBs) to at least one data stream transmitted via an enhanced-physical downlink shared channel (E-PDSCH);

generating control information for each of the RBs;

allocating the control information for each of the RBs to a resource region for an enhanced-physical downlink control channel (E-PDCCH); and

performing one of;

beamforming of the control information for each of the RBs based on the resource region,

spatial-multiplexing of the control information associated with the RBs based on the resource region, and

beamforming-based spatial-multiplexing of the control information associated with the RBs based on the resource region.

2. The transmission method of claim 1, further comprising:

generating an indicator indicating whether the E-PDCCH is used in a subsequent resource allocation period,

wherein the control information includes the indicator.

3. The transmission method of claim 1, wherein the allocating of the control information comprises:

allocating the control information to enable the resource region used for transmitting the control information to be a portion of a physical resource used by the E-PDSCH.

4. The transmission method of claim 1, further comprising:

generating common control information used for decoding the control information for each of the RBs; and

transmitting the common control information via a physical downlink control channel (PDCCH).

5. The transmission method of claim 4, wherein the generating comprises:

generating at least one of information associated with a range of the resource region to which the control information for each of the RBs is allocated, information associated with a range of the RBs to which the at least one data stream is allocated, a group terminal identifier for a terminal where decoding of E-PDCCH is to be performed, information associated with a location and a pilot pattern for demodulation, information associated with a power offset, and information associated with a transport format.

6. The transmission method of claim 4, wherein:

the allocating of the RBs comprises allocating a portion of all the RBs for the at least one data stream to the at least one data stream,

the allocating of the control information comprises allocating the control information using a portion of an entire resource region for the E-PDCCH, and

the generating of the common control information comprises generating the control information including the information associated with the portion of all the RBs and information associated with the portion of the entire resource region.

7. The transmission method of claim 4, further comprising:

allocating the common control information to a predetermined resource region for the PDCCH,

wherein both a type 1 terminal and a type 2 terminal successfully decode the information received via the PHCCH, and the type 2 terminal is supported by a different type of system than the type 1 terminal.

8. The transmission method of claim 7, wherein the type 1 terminal is supported by an enhanced system and the type 2 terminal is supported by a general system.

9. The transmission method of claim 1, further comprising:

generating common control information used for decoding the control information for each of the RBs; and

transmitting the common control information via a predetermined broadcast channel.

10. The transmission method of claim 9, wherein the generating comprises:

generating at least one of information associated with a range of the resource region to which the control information for each of the RBs is allocated, information associated with a range of the RBs to which the at least one data stream is allocated, a group terminal identifier for a terminal where decoding of E-PDCCH is to be performed, information associated with a location and a pilot pattern for demodulation, information associated with a power offset, and information associated with a transport format.

11. The transmission method of claim 9, wherein:

the allocating of the RBs comprises allocating a portion of all the RBs for the at least one data stream to the at least one data stream,

the allocating of the control information comprises allocating the control information using a portion of an entire resource region for the E-PDCCH, and

the generating of the common control information comprises generating the control information including the information associated with the portion of all the RBs and information associated with the portion of the entire resource region.

12. The transmission method of claim 1, wherein the generating of the control information generates at least one of information associated with a range of the RBs to which the at least one data stream is allocated, information associated with a number of the at least one data stream, a terminal identifier of a terminal to which control information is allocated, location information and a pilot pattern for demodulation, information associated with a power offset, information associated with a co-scheduled terminal, H-ARQ information, and information associated with a modulation and coding scheme.

13. The transmission method of claim 1, wherein the allocating of the control information comprises:

allocating the control information to enable the resource region for the E-PDCCH to overlap a region of the RBs to which the at least one data stream is allocated.

14. The transmission method of claim 1, wherein, when a type 1 terminal and a type 2 terminal exist, the type 1 terminal succeeds in decoding information received via the E-PDCCH and the type 2 terminal does not decode or fails in decoding the information received via the E-PDCCH, and the type 2 terminal is supported by a different type of system than the type 1 terminal.

15. The transmission method of claim 14, wherein the type 1 terminal is supported by an enhanced system and the type 2 terminal is supported by a general system.

16. A reception method, comprising:

extracting a previous indicator included in multiple pieces of control information received in a previous resource allocation period;

determining, using the previous indicator, a channel through which multiple pieces of target control information are transmitted, from among an E-PDCCH and a PDCCH; and

decoding the multiple pieces of target control information based on the determination.

17. The method of claim 16, wherein, when the determination determines that the multiple pieces of target control information are transmitted through the PDCCH, the decoding comprises:

decoding the multiple pieces of target control information based on a radio resource for the PDCCH.

18. The method of claim 16, wherein, when the determination determines that the multiple pieces of target control information are transmitted through the E-PDCCH,

the method further comprises receiving common control information of the multiple pieces of target control information via one of the PDCCH and a predetermined channel;

and

the decoding comprises decoding the multiple pieces of target control information based on the common control information.

19. The method of claim 18, wherein the decoding comprises:

decoding the common control information based on a group terminal identifier that is commonly allocated to all terminals in an enhanced system.

20. The method of claim 16, wherein, when each of the multiple pieces of target control information corresponds to a respective data stream and the determination determines that the multiple pieces of target control information are transmitted via the E-PDCCH, the decoding comprises decoding each of the multiple pieces of target control information based on a signal to noise ratio (SNR) of corresponding target control information.

21. The method of claim 20, wherein the decoding comprises:

determining a decoding sequence for the multiple pieces of target control information based on an SNR of each target control information, and continuously decoding the multiple pieces of target control information until a desired number of target control information is successfully decoded.

22. The method of claim 16, further comprising:

decoding, based on the multiple pieces of decoded target control information, at least one data stream received from the E-PDSCH or a physical downlink shared channel (PDSCH).

23. The method of claim 16, wherein, when the determination determines that the multiple pieces of target control information are transmitted via the E-PDCCH, the multiple pieces of target control information includes information associated with RBs allocated to at least one data stream, and the at least one data stream is transmitted via the E-PDSCH.

24. The method of claim 16, wherein, when the multiple pieces of target control information are allocated to the same resource region, the resource region is for the E-PDCCH, and the multiple pieces of target control information are one of spatial-multiplexed, beamforming-processed, and a beamforming-based spatial-multiplexed based on the same resource region.

25. The method of claim 16, wherein, when a type 1 terminal and a type 2 terminal exist, the type 1 terminal succeeds in decoding information received via the E-PDCCH and the type 2 terminal does not decode or fail in decoding the information received via the E-PDCCH, and the type 2 terminal is supported by a different type of system than the type 1 terminal.

26. The method of claim 25, wherein the type 1 terminal is supported by an enhanced system and the type 2 terminal is supported by a general system.

27. A reception method, comprising:

receiving control information that is one of beamforming-processed, spatial-multiplexed, and beamforming-based spatial-multiplexed, via an E-PDCCH;

decoding the control information based on a blind decoding scheme;

recognizing, based on the decoded control information, RBs allocated to least one data stream that is transmitted via the E-PDSCH; and

receiving at least one data stream based on the RBs allocated to the at least one data stream.

28. The reception method of claim 27, wherein, when a type 1 terminal and a type 2 terminal exist, the type 1 terminal succeeds in decoding information received via the E-PDCCH and the type 2 terminal does not decode or fail in decoding the information received via the E-PDCCH, and the type 2 terminal is supported by a different type of system than the type 1 terminal.

29. The reception method of claim 28, wherein the type 1 terminal is supported by an enhanced system and the type 2 terminal is supported by a general system.

30. A transmitter, comprising:

a scheduler to allocate RBs to at least one data stream transmitted via an E-PDSCH, to generate control information for each of the RBs, and to allocate the control information for each of the RBs to a resource region for an E-PDCCH; and

a spatial-multiplexer to perform one of beamforming, spatial-multiplexing, and beamforming-based spatial-multiplexing with respect to each of the RBs, based on the resource region.

31. A receiver, comprising:

a memory to store a previous indicator included in control information received in a previous resource allocation period; and

a processor to determine, based on the previous indicator, a channel through which target control information is transmitted, from among an E-PDCCH or a PDCCH, and to decode the target control information based on the determination.