Multi-slot reference signal triggering using reference signal identities
A network node is configured to communicate with a wireless device. The network node includes a radio interface and processing circuitry configured to transmit a configuration of a set of reference signals via RRC signaling to the wireless device. The radio interface and processing circuitry are further configured to transmit a downlink control information, DCI, that triggers the set of reference signals in multiple slots to the wireless device, where each set of reference signal is confined to OFDM symbols within a slot. In some embodiments, the DCI includes a field which indicates a reference signal set combination ID. In further embodiments the reference signal set combination ID indicates a list of RS set IDs. A method for a network node, a wireless device and a method for a wireless device are also provided.
1 . A network node configured to communicate with a wireless device (WD), the network node comprising a radio interface and processing circuitry configured to:
transmit, to the wireless device, a configuration of sets of reference signals via radio resource control (RRC) signaling; and
transmit, to the wireless device, a downlink control information, DCI, that triggers the sets of reference signals (RS) in multiple slots, each set of reference signals being confined to orthogonal frequency division multiplexed (OFDM) symbols within a slot, the number of slots in which sets of reference signal are triggered being determined by a number of RS set IDs configured in a reference signal set combination ID.
2 . The network node of claim 1 , wherein the DCI comprises a field which indicates a reference signal set combination ID, which identifies a combination of sets of reference signals.
3 . The network node of claim 2 , wherein the combination of the set of reference signals is identified using identities, RS set IDs, which identifies the sets of reference signals in the combination of the set of reference signals.
4 . The network node of claim 3 , wherein the reference signal set combination ID indicates a list of RS set IDs.
5 . The network node of claim 1 , wherein the RRC signaling configures the UE with a list of reference signal set combination IDs.
6 . The network node of claim 1 , wherein the RRC signaling configures each set of reference signals with a slot offset value.
7 . The network node of claim 1 , wherein the slot offset for a particular set of reference signals relative to slot n is determined by the position in the list of RS set IDs for the combination of sets of reference signals.
8 . The network node of claim 1 , wherein the DCI triggers the sets of reference signals in multiple slots according to the slot offset of each of the set of reference signals in the combination of the set of reference signals.
9 . The network node of claim 1 , wherein the DCI that triggers a collection of channel state information reference signal (CSI-RS) sets triggered in multiple-slots further indicates to the wireless device to report the top-N measurement values amongst the CSI-RS resource sets collection.
10 . The network node of claim 1 , wherein if the triggered reference signal sets are channel state information reference signal (CSI-RS) sets, the wireless device is configured with a plurality of beam repetition indicator, BRI, values, wherein each CSI-RS resource across the multiple slots is associated with a particular BRI value from the plurality of BRI values.
11 . The network node of claim 10 , wherein if UE is configured with the same BRI value for two or more CSI-RS resources, the UE assumes the CSI-RS resources are transmitted with the same downlink spatial domain transmission filter such that the UE can adjust the spatial domain reception filter when performing measurements on the CSI-RS resources.
12 . A wireless device (WD) configured to communicate with a network node, the WD comprising a radio interface and processing circuitry configured to:
receive, from the network node, a configuration of sets of reference signals, RSs, via radio resource control (RRC) signaling;
receive, from the network node, a triggering of the set of reference signals via a downlink control information, DCI, wherein the DCI triggers reference signal in multiple slots, a number of slots in which sets of reference signals are triggered being determined by a number of RS set IDs configured in a reference signal set combination ID; and
at least one of transmit or receive the set of reference signals in multiple slots as indicated by the information received from the network node; wherein each set of reference signals is confined to orthogonal frequency division multiplexed (OFDM symbols within a slot.
13 . The wireless device of claim 12 , wherein the RRC signaling configures the UE with a list of reference signal set combination IDs.
14 . The wireless device of claim 13 , wherein the DCI that triggers a collection of channel state information, CSI, RS sets triggered in multiple-slots-further indicate to the wireless device to report the top-N measurement values amongst the CSI-RS resource set of collection.
15 . The wireless device of claim 12 , wherein a slot offset for a particular set of reference signals relative to slot n is determined by the position in the list of RS set IDs for the combination of sets of reference signals.
16 . The wireless device of claim 12 , wherein the DCI triggers the sets of reference signals in multiple slots according to the slot offset of each of the set of reference signals in the combination of the set of reference signals.
17 . The wireless device of claim 12 , wherein if the triggered reference signal sets are channel state information reference signal (CSI-RS) sets, the wireless device is configured with a plurality of beam repetition indicator, BRI, values, wherein each CSI-RS resource across the multiple slots is associated with a particular BRI value from the plurality of BRI values.
18 . The wireless device of claim 17 , wherein when two consecutive BRI values are different, the wireless device determines to adjust its spatial domain reception filter.
19 . A method implemented in a wireless device, WD, configured to communicate with a network node, the method comprising:
receiving, from the network node, a configuration of sets of reference signals via radio resource control (RRC) signaling;
receiving, from the network node, a trigger of the set of reference signals via a downlink control information, DCI, a number of slots in which sets of reference signals are triggered being determined by a number of RS set IDs configured in a reference signal set combination ID; and
at least one of transmitting or receiving the set of reference signals in multiple slots as indicated by the information received from the network node; wherein each set of reference signals is confined to OFDM symbols within a slot.