Joint resource map design of dm-rs and pt-rs

Abstract

A method, network node and wireless device in a wireless communication system for one of transmitting and receiving a phase-tracking reference signal, PT-RS. The method includes obtaining information about a position in a time domain of a scheduled first demodulation reference signal, DM-RS, in a slot, and one of transmitting and receiving the PT-RS within the slot, the position of the PT-RS depending on the position in the time domain of the scheduled first DM-RS.

1 . A method for use in a radio node in a wireless communication system for one of transmitting and receiving a phase-tracking reference signal, PT-RS, the method comprising:
 obtaining information about a position in a time domain of a scheduled first demodulation reference signal, DM-RS, in a slot; and   one of transmitting and receiving the PT-RS within the slot, the position of the PT-RS depending on the position in the time domain of the scheduled first DM-RS.   
     
     
         2 . The method of  claim 1 , wherein the obtaining comprises one of receiving information about and determining the position in the time domain of the scheduled first DM-RS. 
     
     
         3 . The method of  claim 1 , further comprising:
 obtaining information about a position of a first time symbol in a slot scheduled for data transmission; and   obtaining information about a position of a last time symbol in the slot scheduled for data transmission.   
     
     
         4 . The method of  claim 1 , further comprising:
 obtaining information indicating a scheduled modulation and coding scheme, MCS; and   transmitting the PT-RS with a time density based on the scheduled MCS.   
     
     
         5 . The method of  claim 4 , wherein the time density is one of 1, ½ and ¼. 
     
     
         6 . The method of  claim 1 , further comprising:
 mapping the PT-RS to resource elements, REs, in the slot based on one or more of a position of the scheduled first DM-RS, a scheduled MCS, a required time density, a position of the first time symbol scheduled for data transmission and a position of the last time symbol scheduled for data transmission.   
     
     
         7 . The metho/d of  claim 1 , wherein the first DM-RS is scheduled in resource elements, REs, which span a plurality of subcarriers in frequency and at least one time symbol of the slot in time, while the PT-RS is one of transmitted and received in REs which span at least one subcarrier in frequency and multiple time symbols of the slot in time. 
     
     
         8 . The method of any of  claim 1 , wherein a physical resource block, PRB, of the slot has 12 subcarriers in the frequency domain and one of 12 and 14 time symbols in the time domain. 
     
     
         9 . The method of  claim 1 , wherein the radio node is a wireless device. 
     
     
         10 . The method of  claim 1 , wherein the radio node is a network node. 
     
     
         11 . A radio node in a wireless communication system configured for one of transmitting and receiving a phase tracking-reference signal, PT-RS, the radio node comprising:
 processing circuitry configured to:
 obtain information about a position in a time domain of a scheduled first demodulation reference signal, DM-RS in a slot; and 
 one of transmit and receive the PT-RS within the slot, the position of the PT-RS depending on the position in the time domain of the scheduled first DM-RS. 
   
     
     
         12 . The radio node of  claim 11 , wherein the obtaining comprises one of receiving and determining information about the position in the time domain of the scheduled first DM-RS. 
     
     
         13 . The radio node of  claim 11 , wherein the processing circuitry is further configured to:
 obtain information about a position of a first time symbol in a slot scheduled for data transmission; and   obtain information about a position of a last time symbol in the slot scheduled for data transmission.   
     
     
         14 . The radio node  claim 11 , wherein the processing circuitry is further configured to:
 obtain information indicating a scheduled modulation and coding scheme, MCS; and   transmit the PT-RS with a time density based on the scheduled MCS.   
     
     
         15 . The radio node of  claim 14 , wherein the time density is one of 1, ½ and ¼. 
     
     
         16 . The radio node of  claim 11 , wherein the processing circuitry is further configured to:
 map the PT-RS to resource elements, REs, in the slot based on one or more of a position of the scheduled first DM-RS, a scheduled MCS, a required time-density, a position of the first time symbol scheduled for data transmission and a position of the last time symbol scheduled for data transmission.   
     
     
         17 . The radio node of any of  claim 11 , wherein the first DM-RS is scheduled in resource elements, REs, which span a plurality of subcarriers in frequency and at least one time symbol of the slot in time, while the PT-RS is one of transmitted and received in REs which span at least one subcarrier in frequency and multiple time symbols of the slot in time. 
     
     
         18 . The radio node of  claim 11 , wherein a physical resource block, PRB, of the slot has 12 subcarriers in the frequency domain and one of 12 and 14 time symbols in the time domain. 
     
     
         19 . The radio node of  claim 11 , wherein the radio node is a wireless device. 
     
     
         20 . The radio node of  claim 11 , wherein the radio node is a network node.