Method and apparatus for communication in multi-beam scenarios
A method and a device in a node used for wireless communications are disclosed in the present disclosure. A node transmits a first signal, a first reference signal and a second reference signal on a first channel; small-scale fading channel parameters experienced by the second reference signal are used to infer small-scale fading channel parameters experienced by the first signal; the first reference signal is associated with at least one antenna port of the second reference signal, a first MCS is used to determine time-domain density of the first reference signal, and the first MCS is different from an MCS employed by the first signal. The present disclosure associates an MCS to which the resource mapping of PTRS refers with an MCS employed by data, making it easier for the base station to acquire the mapping of PTRS in non-scheduling-based uplink transmission, thus enhancing the overall system performance.
1 . A User Equipment (UE) comprising:
a transceiver configured to receive an information block, wherein the information block indicates candidate parameters for a channel, wherein the candidate parameters are associated with respective Modulation and Coding Schemes (MCSs);
the transceiver configured to transmit a first signal, a first reference signal, and a second reference signal on the channel, wherein the first reference signal and the first signal are transmitted using a first one of the candidate parameters and a first one of the MCSs that is associated with the first one of the candidate parameters, wherein the first reference signal is associated with at least one antenna port of the second reference signal.
2 . The UE of claim 1 , the transceiver further configured to transmit a second signal on the channel using the first one of the candidate parameters.
3 . The UE of claim 2 , wherein the second signal occupies a first time-frequency resource that is different from a second time-frequency resource occupied by the first reference signal.
4 . The UE of claim 2 , wherein the candidate parameters are associated with respective candidate MCS sets, and each one of the respective candidate MCS sets comprises a respective one of the MCSs that is associated with one of the candidate parameters.
5 . The UE of claim 4 , wherein the first one of the candidate parameters is used to determine a first one of the candidate MCS sets, wherein the first one of the candidate MCS sets comprises the first one of the MCSs, and the second signal is used to indicate the first one of the MCSs.
6 . The UE of claim 2 , wherein the second signal comprises Uplink Control Information (UCI), wherein the second signal is used to indicate at least one of: a time-domain resource occupied by the first signal, a frequency-domain resource occupied by the first signal, a Hybrid Automatic Repeat reQuest (HARQ) process number associated with the first signal, or a Redundant Version (RV) associated with the first signal.
7 . The UE of claim 1 , the transceiver configured to monitor a sub-band;
the UE further comprising a processor configured to determine, based on the monitored sub-band, that the channel can be used to transmit a radio signal, wherein the channel belongs to the monitored sub-band in a frequency domain.
8 . The UE of claim 1 , wherein the first signal comprises codewords of two different MCSs, wherein the first reference signal is associated with an antenna port with a lowest index among antenna ports of an antenna port set.
9 . The UE of claim 1 , wherein the first one of the MCSs is an MCS with a highest code rate among the MCSs associated with the candidate parameters.
10 . The UE of claim 1 , wherein the first one of the MCSs is an MCS with a highest modulation order among the MCSs associated with the candidate parameters.
11 . A base station for wireless communications, comprising:
a transceiver configured to transmit an information block, wherein the information block indicates candidate parameters for a channel, wherein the candidate parameters are associated with respective Modulation and Coding Schemes (MCSs);
the transceiver configured to receive a first signal, a first reference signal, and a second reference signal on a channel, wherein the first reference signal and the first signal are transmitted using a first one of the candidate parameters and a first one of the MCSs that is associated with the first one of the candidate parameters,
wherein the first reference signal is associated with at least one antenna port of the second reference signal.
12 . The base station of claim 11 , the transceiver configured to receive a second signal on the channel, wherein the second signal is transmitted using the first one of the candidate parameters.
13 . The base station of claim 12 , wherein the second signal occupies a first time-frequency resource that is different from a second time-frequency resource occupied by the first reference signal.
14 . The base station of claim 12 , wherein the candidate parameters are associated with respective candidate MCS sets, and each one of the respective candidate MCS sets comprises a respective one of the MCSs that is associated with one of the candidate parameters.
15 . The base station of claim 14 , wherein the first one of the candidate parameters is used to determine a first one of the candidate MCS sets, wherein the first one of the candidate MCS sets comprises the first one of the MCSs, and the second signal is used to indicate the first one of the MCSs.
16 . The base station of claim 15 , wherein the second signal comprises Uplink Control Information (UCI), wherein the second signal is used to indicate at least one of: a time-domain resource occupied by the first signal, a frequency-domain resource occupied by the first signal, a HARQ process number associated with the first signal, or a Redundant Version (RV) associated with the first signal.
17 . A method performed by a USER Equipment (UE), the method comprising:
receiving an information block, wherein the information block indicates candidate parameters for a channel, wherein the candidate parameters are associated with respective Modulation and Coding Schemes (MCSs); and
transmitting a first signal, a first reference signal, and a second reference signal on the channel, wherein the first reference signal and the first signal are transmitted using a first one of the candidate parameters and a first one of the MCSs that is associated with the first one of the candidate parameters,
wherein the first reference signal is associated with at least one antenna port of the second reference signal.
18 . The method of claim 17 , further comprising:
transmitting a second signal on the channel using the first one of the candidate parameters.
19 . The method of claim 18 , wherein the second signal occupies a first time-frequency resource that is different from a second time-frequency resource occupied by the first reference signal.
20 . The method of claim 17 , the method further comprising:
monitoring a sub-band; and
determining, based on the monitored sub-band, that the channel can be used to transmit a radio signal, wherein the channel belongs to the monitored sub-band in a frequency domain.