Demodulation Reference Signaling in LTE/NR Coexistence

Network node for a NR radio access network, the network node being adapted for transmitting demodulation reference signaling, DM-RS, associated to downlink channel signaling, the DM-RS having a DM-RS pattern in frequency domain over a range of subcarriers including a reference subcarrier, wherein in a first frequency range below the reference subcarrier, the DM-RS pattern comprises a first sub-pattern represented by a repeated flush arrangement of a pattern element covering a number NP of subcarriers,

• and in a second frequency range above the reference subcarrier, the DM-RS pattern comprises a second sub-pattern represented by a repeated flush arrangement of the pattern element, wherein the first sub-pattern and the second sub-pattern are separated in frequency domain by an interrupting pattern having a number NI of subcarriers, wherein NI>0 and NI is different from NP.

Method of operating a user equipment in a NR radio access network, the method comprising receiving downlink channel signaling based on DM-RS signaling associated to the downlink channel signaling, wherein receiving the downlink channel signaling comprises demodulating the downlink channel signaling based on a DM-RS pattern associated to the DM-RS signaling, wherein the DM-RS pattern covers in frequency domain a range of subcarriers, and is determined, based on a coordination indication indicating presence of Cell-Specific Reference Signaling, to include a reference subcarrier, and to comprise, in a frequency range below the reference subcarrier, a first sub-pattern represented by a repeated flush arrangement of a pattern element covering a number NP of subcarriers, and to comprise in a second frequency range above the reference subcarrier, to comprise a second sub-pattern represented by a repeated flush arrangement of the pattern element, wherein the first sub-pattern and the second sub-pattern are separated by an interrupting pattern having a number NI of subcarriers, wherein NI>0 and NI is different from NP.

User equipment for a NR radio access network, the user equipment being adapted for receiving downlink channel signaling based on DM-RS signaling associated to the downlink channel signaling, wherein receiving the downlink channel signaling comprises demodulating the downlink channel signaling based on a DM-RS pattern associated to the DM-RS signaling, wherein the DM-RS pattern covers in frequency domain a range of subcarriers, and is determined, based on a coordination indication indicating presence of Cell-Specific Reference Signaling, to include a reference subcarrier, and to comprise, in a frequency range below the reference subcarrier, a first sub-pattern represented by a repeated flush arrangement of a pattern element covering a number NP of subcarriers, and to comprise in a second frequency range above the reference subcarrier, to comprise a second sub-pattern represented by a repeated flush arrangement of the pattern element, wherein the first sub-pattern and the second sub-pattern are separated by an interrupting pattern having a number NI of subcarriers, wherein NI>0 and NI different from NP.

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