Time and frequency relation for uplink (UL) transmission
A method, system and apparatus are disclosed. According to some embodiments, a network node is provided which is configured to communicate with a wireless device using at least one of a plurality of transmission and reception points, TRPs. The network node includes processing circuitry configured to indicate to the wireless device a first downlink reference signal, DL RS, of a plurality of downlink reference signals, DL RSs, to use for deriving an uplink, UL, transmission parameter for an UL transmission, each of the plurality of DL RSs being associated with a respective one of the plurality of TRPs. The processing circuitry is further configured to receive the UL transmission, the UL transmission being based on the derived UL transmission parameter.
1 . A network node configured to communicate with a wireless device using at least one of a plurality of transmission and reception points, TRPs, the network node including processing circuitry configured to cause the network node to:
indicate to the wireless device a first downlink reference signal, DL RS, of a plurality of downlink reference signals, DL RSs, to use for deriving an uplink, UL, transmission parameter for an UL transmission, each of the plurality of DL RSs being associated with a respective one of the plurality of TRPs, the indication defining a timing relation between the first DL RS and the UL transmission, the indication being dynamically configured and being signalled using a Downlink Control Information, DCI, format; and
receive the UL transmission, the UL transmission being based on the derived UL transmission parameter.
2 . The network node of claim 1 , wherein the UL transmission parameter is one of a frequency parameter and a timing parameter.
3 . The network node of claim 1 , wherein the indication is one of explicit and implicit.
4 . The network node of claim 1 , wherein:
the plurality of DL RSs include at least one of:
a tracking reference signal, TRS;
a synchronization signal block, SSB; and
a channel state information reference signal, CSI-RS; and
the UL transmission includes at least one of:
a physical uplink shared channel, PUSCH;
a physical uplink control channel, PUCCH; and
a sounding reference signal, SRS.
5 . A wireless device configured to communicate with a network node via at least one of a plurality of transmission and reception points, TRPs, the wireless device including processing circuitry configured to cause the wireless device to:
receive an indication of a first downlink reference signal, DL RS, of a plurality of DL RSs, each of the plurality of DL RSs being associated with a respective one of the plurality of TRPs, the indication defining a timing relation between the first DL RS and the UL transmission, the indication being dynamically configured and being signalled using a Downlink Control Information, DCI, format;
derive a parameter for an uplink, UL, transmission based on the first DL RS; and
cause the UL transmission based on the derived UL transmission parameter.
6 . The wireless device of claim 5 , wherein the UL transmission parameter is one of a frequency parameter and a timing parameter.
7 . The wireless device of claim 5 , wherein the indication is one of explicit and implicit.
8 . The wireless device of claim 5 , wherein:
the plurality of DL RSs include at least one of:
a tracking reference signal, TRS;
a synchronization signal block, SSB; and
a channel state information reference signal, CSI-RS; and
the UL transmission includes at least one of:
a physical uplink shared channel, PUSCH;
a physical uplink control channel, PUCCH; and
a sounding reference signal, SRS.
9 . A method implemented in a network node, the network node being configured to communicate with a wireless device using at least one of a plurality of transmission and reception points, TRPs, the method comprising:
indicating to the wireless device a first downlink reference signal, DL RS, of a plurality of downlink reference signals, DL RSs, to use for deriving an uplink, UL, transmission parameter for an UL transmission, each of the plurality of DL RSs being associated with a respective one of the plurality of TRPs, the indication defining a timing relation between the first DL RS and the UL transmission, the indication being dynamically configured and being signalled using a Downlink Control Information, DCI, format; and
receiving the UL transmission, the UL transmission being based on the derived UL transmission parameter.
10 . The method of claim 9 , wherein the UL transmission parameter is one of a frequency parameter and a timing parameter.
11 . The method of claim 9 , wherein:
the plurality of DL RSs include at least one of:
a tracking reference signal, TRS;
a synchronization signal block, SSB; and
a channel state information reference signal, CSI-RS; and
the UL transmission includes at least one of:
a physical uplink shared channel, PUSCH;
a physical uplink control channel, PUCCH; and
a sounding reference signal, SRS.
12 . A method implemented by a wireless device, the wireless device being configured to communicate with a network node via at least one of a plurality of transmission and reception points, TRPs, the method comprising:
receiving an indication of a first downlink reference signal, DL RS, of a plurality of DL RSs, each of the plurality of DL RSs being associated with a respective one of the plurality of TRPs, the indication defining a timing relation between the first DL RS and the UL transmission, the indication being dynamically configured and being signalled using a Downlink Control Information, DCI, format;
deriving a parameter for an uplink, UL, transmission based on the first DL RS; and
causing the UL transmission based on the derived UL transmission parameter.
13 . The method of claim 12 , wherein the UL transmission parameter is one of a frequency parameter and a timing parameter.