Coordinated Multipoint Transmission and Reception (CoMP)

• US 20140044061A1
• Filed: 07/23/2013
• Published: 02/13/2014
• Est. Priority Date: 07/25/2012
• Status: Active Grant

• Current Assignee: JVC Kenwood Corporation
• Original Assignee: NEC Laboratories America Inc (NEC Corporation)
• Inventors: Yue, Guosen, Prasad, Narayan, Jiang, Meilong, Rangarajan, Sampath
• Granted Patent: US 9,094,145 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0077 Cooperative coding
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system is disclosed. The communications method comprises transmitting, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping, and transmitting, to the UE, one of the four indicators, each of which is conveyed in 2 bits, wherein the four indicators comprises ‘00’, ‘01’, ‘10’, and ‘11’ corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively. Other methods, apparatuses, and systems are also disclosed.

Claims

1. A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system, the communications method comprising:

transmitting, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping; and

transmitting, to the UE, one of the four indicators, each of which is conveyed in 2 bits,

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.

2. The communications method as in claim 1,

wherein indicators ‘

00’

, ‘

01’

, and ‘

10’

are in accordance with PDSCH RE mapping of a first transmission point (TP-1), a second transmission point (TP-2), and a third transmission point (TP-3) in a measurement set.

3. The communications method as in claim 2, wherein a serving cell includes the first transmission point.

4. The communications method as in claim 1, wherein the attributes include at least one of cell-specific reference signal (CRS) information, quasi-co-location information, and a PDSCH start point.

5. The communications method as in claim 1, wherein the attributions are transmitted semi-statically and the indication is transmitted dynamically.

6. The communications method as in claim 1, wherein the indicator is conveyed in a downlink control information (DCI) format.

7. The communications method as in claim 1, wherein the transmission point comprises a macro-cell base station (BS) or a low power remote radio head (RRH).

8. A communications method implemented in a user equipment (UE) used in a coordinated multipoint transmission and reception (CoMP) system, the communications method comprising:

receiving, from a transmission point (TP), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping; and

receiving, from the TP, one of the four indicators, each of which is conveyed in 2 bits,

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.

9. The communications method as in claim 8,

wherein indicators ‘

00’

, ‘

01’

, and ‘

10’

are in accordance with PDSCH RE mapping of a first transmission point (TP-1), a second transmission point (TP-2), and a third transmission point (TP-3) in a measurement set.

10. The communications method as in claim 9, wherein a serving cell includes the first transmission point.

11. The communications method as in claim 8, wherein the attributes include at least one of cell-specific reference signal (CRS) information, quasi-co-location information, and a PDSCH start point.

12. The communications method as in claim 8, wherein the attributions are transmitted semi-statically and the indication is transmitted dynamically.

13. The communications method as in claim 8, wherein the indicator is conveyed in a downlink control information (DCI) format.

14. The communications method as in claim 8, wherein the transmission point comprises a macro-cell base station (BS) or a low power remote radio head (RRH).

15. A communications method implemented in a coordinated multipoint transmission and reception (CoMP) system, the communications method comprising:

transmitting, from a transmission point (TP) to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping; and

transmitting, from the TP to the UE, one of the four indicators, each of which is conveyed in 2 bits,

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.

16. The communications method as in claim 15,

wherein indicators ‘

00’

, ‘

01’

, and ‘

10’

are in accordance with PDSCH RE mapping of a first transmission point (TP-1), a second transmission point (TP-2), and a third transmission point (TP-3) in a measurement set.

17. The communications method as in claim 16, wherein a serving cell includes the first transmission point.

18. The communications method as in claim 15, wherein the attributes include at least one of cell-specific reference signal (CRS) information, quasi-co-location information, and a PDSCH start point.

19. The communications method as in claim 15, wherein the attributions are transmitted semi-statically and the indication is transmitted dynamically.

20. The communications method as in claim 15, wherein the indicator is conveyed in a downlink control information (DCI) format.

21. The communications method as in claim 15, wherein the transmission point comprises a macro-cell base station (BS) or a low power remote radio head (RRH).

22. A transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system, the transmission point comprising:

a first transmitter to transmit, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping; and

a second transmitter to transmit, to the UE, one of the four indicators, each of which is conveyed in 2 bits,

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.

23. A user equipment (UE) used in a coordinated multipoint transmission and reception (CoMP) system, the user equipment comprising:

a first receiver to receive, from a transmission point (TP), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping; and

a second receiver to receive, from the TP, one of the four indicators, each of which is conveyed in 2 bits,

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.

24. A coordinated multipoint transmission and reception (CoMP) system comprising:

a user equipment (UE); and

a transmission point (TP) to transmit, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping,

wherein the UE receives, from the TP, one of the four indicators, each of which is conveyed in 2 bits, and

wherein the four indicators comprises ‘

00’

, ‘

01’

, ‘

10’

, and ‘

11’

corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively.