Demodulation reference signaling in LTE/NR coexistence
There is disclosed a method of operating a network node, the network node operating according to a first radio access technology, RAT. The method includes transmitting signaling having communication signaling and Demodulation Reference Signaling, DMRS, in a transmission resource pattern. The DMRS is arranged in the transmission resource pattern according to a DMRS pattern, in which the DMRS pattern is selected from a set of DMRS patterns based on a coexistence indication indicating the presence of cell-specific reference signals, CRS, associated to a second RAT.
1 . A method of operating a network node, the network node operating according to a first Radio Access Technology (RAT), the method comprising:
transmitting signaling comprising communication signaling and Demodulation Reference Signaling (DMRS) in a transmission resource pattern, the DMRS being arranged in the transmission resource pattern according to a DMRS pattern, the DMRS pattern being selected from a set of DMRS patterns based on a coexistence indication indicating the presence of Cell-specific Reference Signals (CRS) associated to a second RAT.
2 . The method according to claim 1 , wherein the first RAT corresponds to New Radio (NR) technology, and the second RAT corresponds to Long Term Evolution (LTE) technology.
3 . The method according to claim 1 , wherein the DMRS pattern is selected based on a capability indication indicating the capability of the user equipment to select a DMRS pattern based on a coordination indication.
4 . The method according to claim 1 , wherein the signaling is embedded into the transmission resource structure.
5 . The method according to claim 1 , wherein the communication signaling is Physical Downlink Shared Channel (PDSCH) signaling.
6 . The method according to claim 1 , wherein the transmission resource structure has an end symbol which is arranged in one of:
a symbol before an end symbol of a slot; and
a symbol which coincides with the end symbol of a slot.
7 . The method according to claim 1 , wherein the transmission resource structure is embedded into a slot.
8 . The method according to claim 1 , wherein the transmission resource structure is one of scheduled to end in and comprises at least one of:
the last symbol of a slot; and
at least one of a long communication signaling and Physical Downlink Shared Channel (PDSCH) transmission, scheduled to have a duration from symbol n of a slot to symbol m of a slot, wherein at least one of:
n may be at least one of:
in the range of 1 to 7; and
corresponds to one of the first half of symbols in a slot; and
wherein m is one of:
12 and 13; and
represents one of the last and next-to last symbol of a slot.
9 . The method according to claim 1 , wherein at least one of the coordination indication and the capability indication is provided with higher-layer signaling.
10 . A network node configured to operate according to a first Radio Access Technology (RAT), the network node being configured to:
transmit signaling comprising communication signaling and Demodulation Reference Signaling (DMRS) in a transmission resource pattern, the DMRS being arranged in the transmission resource pattern according to a DMRS pattern, the DMRS pattern being selected from a set of DMRS patterns based on a coexistence indication indicating the presence of Cell-specific Reference Signals (CRS) associated to a second RAT.
11 . A non-transitory computer storage medium storing a computer program comprising instructions that, when executed, cause processing circuitry to at least one of control and perform a method of operating a network node, the network node operating according to a first Radio Access Technology (RAT), the method comprising:
transmitting signaling comprising communication signaling and Demodulation Reference Signaling (DMRS) in a transmission resource pattern, the DMRS being arranged in the transmission resource pattern according to a DMRS pattern, the DMRS pattern being selected from a set of DMRS patterns based on a coexistence indication indicating the presence of Cell-specific Reference Signals (CRS) associated to a second RAT.