Transmission method and apparatus for phase tracking reference signal
A transmission method and apparatus for a phase tracking reference signal. The apparatus is applicable at a terminal equipment side and includes: a first receiving unit configured to receive configuration information or indication information transmitted by a network device, the configuration information or indication information being used for indicating that a terminal equipment receives at least two versions of a transport block in a scheduling unit; and a first determining unit configured to determine an association relationship between a PTRS antenna port and a DMRS antenna port according to the configuration information, the indication information or a predefined rule.
1. A transmission apparatus for a phase tracking reference signal (PTRS), applicable at a terminal equipment side, the apparatus comprising:
a first receiver configured to receive configuration information that is carried by a higher layer parameter and that is transmitted by a network device; and
processor circuitry configured to when the terminal equipment is configured by the configuration information that indicates receiving at least two physical downlink shared channel (PDSCH) transmissions of a same transport block in a scheduling unit, determine an association relationship between a PTRS antenna port and a demodulation reference signal (DMRS) antenna port.
2. The apparatus according to claim 1 , wherein,
the association relationship comprises:
association of a single PTRS antenna port with a first DMRS antenna port.
3. The apparatus according to claim 2 , wherein the first DMRS antenna port is a lowest indexed DMRS antenna port in DMRS antenna ports indicated by DCI.
4. The apparatus according to claim 1 , wherein,
the configuration information contains at least one of following pieces of information:
a scheduling grant configured by higher-layer signaling (configured grant);
the number of times of repeated transmission of a transport block configured by higher-layer signaling;
the number of PTRS antenna ports configured by higher-layer signaling; or
downlink control information (DCI).
5. The apparatus according to claim 1 , wherein,
the association relationship comprises at least one of the following:
association of at least one PTRS antenna port with a DMRS antenna port of a transmission occasion;
association of a single PTRS antenna port with a DMRS antenna port indicated by DCI;
association of at least one PTRS antenna port with a DMRS antenna port in the scheduling unit; or
association of a PTRS antenna port with a DMRS antenna port in a code division multiplexing (CDM) group of a DMRS in the scheduling unit.
6. The apparatus according to claim 5 , wherein,
the association relationship further comprises:
association of two PTRS antenna ports respectively with two DMRS antenna ports in DMRS antenna ports indicated by DCI, or
association of a first one of PTRS antenna ports with a first DMRS antenna port in DMRS antenna ports indicated by DCI, and association of a second one of PTRS antenna ports with an eighth DMRS antenna port therein, or
association of two PTRS antenna ports with a first DMRS antenna port in DMRS antenna ports indicated by DCI.
7. The apparatus according to claim 6 , wherein the association of two PTRS antenna ports respectively with two DMRS antenna ports in DMRS antenna ports indicated by DCI comprises:
association of the first one of PTRS antenna ports with a lowest indexed DMRS antenna port in the DMRS antenna ports indicated by DCI, and association of the second one of PTRS antenna ports with a highest indexed DMRS antenna port in the DMRS antenna ports indicated by DCI, or
association of the first one of PTRS antenna ports with a DMRS antenna port ranking first in the DMRS antenna ports indicated by DCI, and association of the second one of PTRS antenna ports with a DMRS antenna port ranking second in the DMRS antenna ports indicated by DCI.
8. The apparatus according to claim 6 , wherein,
the eighth DMRS antenna port is a DMRS antenna port that is not transmitted in the scheduling unit.
9. The apparatus according to claim 8 , wherein the eighth DMRS antenna port is one of the following antenna ports:
a predefined antenna port;
a second DMRS antenna port in a CDM group different from a CDM group to which the first DMRS antenna port belongs; or
a third DMRS antenna port belonging to the same CDM group as the first DMRS antenna port and being indexed differently from the first DMRS antenna port.
10. The apparatus according to claim 9 , wherein the second DMRS antenna port refers to:
a lowest indexed DMRS antenna port in a lowest indexed CDM group different from the CDM group to which the first DMRS antenna port belongs.
11. The apparatus according to claim 9 , wherein the third DMRS antenna port refers to:
a lowest indexed DMRS antenna port other than the first DMRS antenna port in the CDM group to which the first DMRS antenna port belongs.
12. The apparatus according to claim 5 , wherein,
the association relationship further comprises:
association of a first one of PTRS antenna ports with a fourth DMRS antenna port in a first CDM group in CDM groups practically used or scheduled in the scheduling unit, and association of a second one of PTRS antenna ports with a fifth DMRS antenna port in a second CDM group in the CDM groups practically used or scheduled in the scheduling unit.
13. The apparatus according to claim 12 , wherein the first CDM group is a lowest indexed CDM group in the CDM groups practically used or scheduled in the scheduling unit, and the second CDM group is a highest indexed CDM group in the CDM groups practically used or scheduled in the scheduling unit.
14. The apparatus according to claim 12 , wherein the fourth DMRS antenna port is a lowest indexed DMRS antenna port in the first CDM group, and the fifth DMRS antenna port is a lowest indexed DMRS antenna port in the second CDM group.
15. The apparatus according to claim 5 , wherein,
the association relationship further comprises:
association of a first one of PTRS antenna ports with a sixth DMRS antenna port in DMRS antenna ports allocated for a first transmission occasion in the scheduling unit, and association of a second one of PTRS antenna ports with a seventh DMRS antenna port in DMRS antenna ports allocated for a second transmission occasion in the scheduling unit.
16. The apparatus according to claim 15 , wherein,
the first transmission occasion is a transmission occasion being first in time sequence within the scheduling unit, and the second transmission occasion is a transmission occasion having a transmission configuration indication (TCI) state or a DMRS antenna port different from that of the first transmission occasion.
17. A transmission apparatus for a phase tracking reference signal (PTRS), applicable at a network device side, the apparatus comprising:
a transmitter configured to transmit, to a terminal equipment configuration information carried by a higher layer parameter, when the terminal equipment is configured by the configuration information that indicates receiving at least two physical downlink shared channel (PDSCH) transmissions of a same transport block in a scheduling unit, an association relationship being determined between a PTRS antenna port and a demodulation reference signal (DMRS) antenna port; and
the transmitter being further configured to transmit a PTRS by using a corresponding PTRS antenna port according to the determined association relationship between the PTRS antenna port and the DMRS antenna port.
18. The apparatus according to claim 17 , wherein,
the association relationship comprises:
association of a single PTRS antenna port with a first DMRS antenna port.
19. The apparatus according to claim 18 , wherein the first DMRS antenna port is a lowest indexed DMRS antenna port in DMRS antenna ports indicated by DCI.