Multi-numerology frame structure for nr operation in mm-wave frequency bands

Abstract

A method, system and apparatus are disclosed. According to one or more embodiments, a network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to dynamically indicate a mixed numerology to the wireless device for implementation where the mixed numerology corresponds to a first numerology for a data channel and a second numerology for a control channel, the first numerology being different from the second numerology.

What is claimed is: 
     
         1 . A network node configured to communicate with a wireless device, the network node comprising:
 processing circuitry configured to: 
 dynamically indicate a mixed numerology to the wireless device for implementation, the mixed numerology corresponding to a first numerology for a data channel and a second numerology for a control channel; 
 indicate a subcarrier spacing for a bandwidth part, BWP, in a carrier, the dynamically indicated mixed numerology configured to change a subcarrier spacing for the data channel from the subcarrier spacing to another subcarrier spacing associated with the first numerology; 
 add at least one reference signal symbol to the data channel to densify a DMRS allocation that is based on the preconfigured subcarrier spacing; and 
 rate match the data channel to a reference signal associated with a different subcarrier spacing than the another subcarrier spacing. 
   
     
     
         2 . The network node of  claim 1 , wherein the at least one reference signal symbol is a demodulation reference signal, DMRS, symbol. 
     
     
         3 . The network node of  claim 2 , wherein the additional at least one DMRS symbol is distributed throughout the data channel in a time domain. 
     
     
         4 . The network node of  claim 2 , wherein the additional at least one DMRS symbol is front-loaded next to another DMRS symbol of the DMRS allocation. 
     
     
         5 . The network node of  claim 1 , wherein the data channel and control channel are allocated within a bandwidth part, BWP, that is defined by a plurality of subcarrier spacings, the plurality of subcarrier spacing including the another subcarrier spacing associated with the first numerology and a second subcarrier spacing associated with the second numerology. 
     
     
         6 . The network node of  claim 5 , wherein the plurality of subcarrier spacings are based on the subcarrier spacing for the BWP. 
     
     
         7 . The network node of  claim 6 , wherein a resource block start position and a size of the BWP are based at least in part on the subcarrier spacing. 
     
     
         8 . The network node of  claim 5 , wherein the plurality of subcarrier spacings are based on a largest subcarrier spacing of the plurality of subcarrier spacings. 
     
     
         9 . The network node of  claim 8 , wherein a resource block start position and a size of the BWP are based at least in part on the largest subcarrier spacing of the plurality of subcarrier spacings. 
     
     
         10 . The network node of  claim 1 , wherein the first numerology for the data channel is associated with a larger subcarrier spacing than a subcarrier spacing associated with the second numerology. 
     
     
         11 . The network node of  claim 10 , wherein the subcarrier spacing associated with the second numerology corresponds to a subcarrier spacing preconfigured for a bandwidth part, BWP, in which the data channel and control channel are transmitted. 
     
     
         12 . The network node of  claim 1 , wherein the processing circuitry is further configured to indicate the first numerology at least in part by signaling of an expansion factor, the expansion factor configured to change a subcarrier spacing from the subcarrier spacing for a bandwidth part, BWP, to the another subcarrier spacing associated with the first numerology using the expansion factor. 
     
     
         13 . The network node of  claim 12 , wherein the signaling corresponds to one of semi-static radio resource control, RRC, signaling, semi-persistent medium access control, MAC, control element, CE, signaling and downlink control information, DCI, signaling. 
     
     
         14 . The network node of  claim 13 , wherein the DCI signaling includes a subcarrier spacing section field and a frequency domain resource allocation field that are jointly encoded as a bit field having a predefined bit size. 
     
     
         15 . The network node of  claim 14 , wherein a subset of most significant bits in the bit field are configured to indicate the another subcarrier spacing. 
     
     
         16 . The network node of  claim 1 , wherein the the reference signal is a channel state information reference signal, CSI-RS. 
     
     
         17 . The network node of  claim 1 , wherein the processing circuitry is further configured to multiplex a plurality of sounding reference signals, SRSs, received from a plurality of wireless devices, the plurality of SRSs being associated with a plurality of subcarrier spacings including at least the anothersubcarrier spacing associated with the first numerology. 
     
     
         18 . A wireless device configured to communicate with a network node, the wireless device comprising:
 processing circuitry configured to: 
 receive a dynamic indication of a mixed numerology, the mixed numerology corresponding to a first numerology for a data channel and a second numerology for a control channel; 
 cause implementation of the mixed numerology; and 
 receive an indication for a subcarrier spacing for a bandwidth part, BWP, in carrier, the dynamically indicated mixed numerology configured to change a subcarrier spacing for the data channel from the subcarrier spacing to another subcarrier spacing associated with the first numerology; 
   the data channel including at least one added reference signalsymbol for densifying a DMRS allocation that is based on the preconfigured subcarrier spacing; and   the data channel being rate matched to a reference signal associated with a different subcarrier spacing than the another subcarrier spacing.   
     
     
         19 . A method implemented by a network node that is configured to communicate with a wireless device, the method comprising:
 dynamically indicating a mixed numerology to the wireless device for implementation, the mixed numerology corresponding to a first numerology for a data channel and a second numerology for a control channel;   indicating a subcarrier spacing for a bandwidth part, BWP, in a carrier, the dynamically indicated mixed numerology configured to change a subcarrier spacing for the data channel from the subcarrier spacing to another subcarrier spacing associated with the first numerology;   adding at least one reference signal symbol to the data channel to densify a DMRS allocation that is based on the preconfigured subcarrier spacing; and   rate matching the data channel to a reference signal associated with a different subcarrier spacing than the another subcarrier spacing.