Coordinated multipoint transmission and reception (CoMP)
View Patent ↗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.
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), attributes 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), attributes 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), attributes s 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 traansmit, to a user equipment (UE), attributes 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), attributes 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), attributer; attributes 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.