Method of transmitting and receiving control information based on spatial-multiplexing gain

• US 8,520,619 B2
• Filed: 01/03/2011
• Issued: 08/27/2013
• Est. Priority Date: 04/07/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hong, Young Jun, Clerckx, Bruno, Jung, Young Ho, Cho, Joon Young, Han, Jin Kyu, Lee, In Ho, Ji, Hyoung Ju
• Primary Examiner(s): LIU, JUNG
• Application Number:
  US12/983,702
• Publication Number:
  US 20110249633A1
• Time in Patent Office: 967 Days
• Field of Search: 370/203, 370204-215, 370229-240, 370310-337, 370338-350, 370351-394, 370/395.1, 370/395.3, 370/395.4, 370/395.41, 370/395.42, 370/395.5, 370/395.52, 370/395.53, 370412-421, 370431-457, 370458-463, 370464-497, 370498-529
• 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:

transmitting, to terminals supported by an enhanced system, a group terminal identifier of the terminals;

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 beamforming, or spatial-multiplexing, or beamforming-based spatial-multiplexing, of the control information for each of the RBs, based on the resource region,

wherein a type 1 terminal succeeds in decoding the control information received via the E-PDCCH, and a type 2 terminal does not decode, or fails in decoding, the control information received via the E-PDCCH, and is supported by a different type of system than the type 1 terminal.

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 for each of the RBs comprises the indicator.

3. The transmission method of claim 1, wherein the resource region is used to transmit the control information for each of the RBs, and is 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 to decode 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 common control information comprises information associated with a range of the resource region to which the control information for each of the RBs is allocated, or information associated with a range of the RBs to which the at least one data stream is allocated, or the group terminal identifier of the terminals where decoding of the E-PDCCH is to be performed, or information associated with a location and a pilot pattern for demodulation, or information associated with a power offset, or information associated with a transport format, or any combination thereof.

6. The transmission method of claim 4, wherein:

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

the allocating of the control information comprises allocating the control information for each of the RBs to a portion of an entire resource region for the E-PDCCH; and

the common control information comprises 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 the type 1 terminal and the type 2 terminal successfully decode information received via the PDCCH.

8. The transmission method of claim 7, wherein:

the type 1 terminal is supported by the 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 to decode 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 common control information comprises information associated with a range of the resource region to which the control information for each of the RBs is allocated, or information associated with a range of the RBs to which the at least one data stream is allocated, or the group terminal identifier of the terminals where decoding of the E-PDCCH is to be performed, or information associated with a location and a pilot pattern for demodulation, or information associated with a power offset, or information associated with a transport format, or any combination thereof.

11. The transmission method of claim 9, wherein:

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

the allocating of the control information comprises allocating the control information for each of the RBs to a portion of an entire resource region for the E-PDCCH; and

the common control information comprises 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 control information comprises information associated with a range of the RBs to which the at least one data stream is allocated, or information associated with a number of the at least one data stream, or a terminal identifier of a terminal to which the control information is allocated, or location information and a pilot pattern for demodulation, or information associated with a power offset, or information associated with a co-scheduled terminal, or H-ARQ information, or information associated with a modulation and coding scheme, or any combination thereof.

13. The transmission method of claim 1, wherein the resource region overlaps a region of the RBs to which the at least one data stream is allocated.

14. The transmission method of claim 1, wherein:

the type 1 terminal is supported by the enhanced system; and

the type 2 terminal is supported by a general system.

16. The transmission method of claim 1, wherein a portion of the RBs allocated to the at least one data stream transmitted via the E-PDSCH is not used.

17. The transmission method of claim 1, wherein a portion of the resource region for the E-PDCCH is not used.

18. The transmission method of claim 4, wherein the common control information comprises the group terminal identifier of the terminals.

19. The transmission method of claim 4, wherein the terminals receive the group terminal identifier and the common control information, and decode the common control information based on the received group terminal identifier.

15. A transmitter, comprising:

a transmission module configured to transmit, to terminals supported by an enhanced system, a group terminal identifier of the terminals;

a scheduler configured to

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

generate control information for each of the RBs, and

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

a spatial-multiplexer configured to perform beamforming, or spatial-multiplexing, or beamforming-based spatial-multiplexing, of the control information for each of the RBs, based on the resource region,

wherein a type 1 terminal succeeds in decoding the control information received via the E-PDCCH, and a type 2 terminal does not decode, or fails in decoding, the control information received via the E-PDCCH, and is supported by a different type of system than the type 1 terminal.