Limits for modulation and coding scheme values

Abstract

Various aspects of the disclosure relate to limits for modulation and coding scheme (MCS) values. For example, a first set of limits (e.g., minimum and maximum limits) may be used for a first MCS table and a second set of limits may be used for a second MCS table. The disclosure also relates in some aspects to inter-device signaling that indicates which minimum and maximum limits for an MCS table are to be used for communication between the devices.

What is claimed is: 
     
         1 . An apparatus for communication comprising:
 a memory; and   a processor coupled to the memory,   the processor and the memory configured to:
 determine a first minimum value and a first maximum value for a first set of modulation and coding scheme (MCS) values defined for peer-to-peer communication between a first device and a second device; 
 determine a second minimum value and a second maximum value for a second set of MCS values defined for the peer-to-peer communication; and 
 send the first minimum value, the first maximum value, the second minimum value, and the second maximum value to the first device. 
   
     
     
         2 . The apparatus of  claim 1 , further comprising:
 determining at least one other minimum value and at least one other maximum value for at least one other set of MCS values defined for the peer-to-peer communication; and   sending the at least one other minimum value and the at least one other maximum value to the first device.   
     
     
         3 . The apparatus of  claim 1 , wherein:
 the first set of MCS values comprises a first MCS table; and   the second set of MCS values comprises a second MCS table.   
     
     
         4 . The apparatus of  claim 3 , wherein:
 the first MCS table supports up to a first modulation order; and   the second MCS table supports up to a second modulation order that is different from the first modulation order.   
     
     
         5 . The apparatus of  claim 3 , wherein:
 the first MCS table supports up to 16 quadrature amplitude modulation (QAM); and   the second MCS table supports up to 64 QAM.   
     
     
         6 . The apparatus of  claim 1 , wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value comprises:
 determining a condition of a channel to be used for the peer-to-peer communication; and   selecting the first minimum value, the first maximum value, the second minimum value, and the second maximum value based on the determined condition of the channel.   
     
     
         7 . The apparatus of  claim 6 , wherein the channel is a sidelink data channel. 
     
     
         8 . The apparatus of  claim 6 , wherein the channel is a vehicle-to-anything data channel. 
     
     
         9 . The apparatus of  claim 1 , wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value is based on a condition associated with at least one of the first device or the second device. 
     
     
         10 . The apparatus of  claim 9 , wherein the condition comprises at least one rate of motion of at least one of the first device or the second device. 
     
     
         11 . A method of communication for an apparatus, comprising:
 determining a first minimum value and a first maximum value for a first set of modulation and coding scheme (MCS) values defined for peer-to-peer communication between a first device and a second device;   determining a second minimum value and a second maximum value for a second set of MCS values defined for the peer-to-peer communication; and   sending the first minimum value, the first maximum value, the second minimum value, and the second maximum value to the first device.   
     
     
         12 . The method of  claim 11 , wherein:
 the first set of MCS values comprises a first MCS table; and   the second set of MCS values comprises a second MCS table.   
     
     
         13 . The method of  claim 12 , wherein:
 the first MCS table supports up to a first modulation order; and   the second MCS table supports up to a second modulation order that is different from the first modulation order.   
     
     
         14 . The method of  claim 11 , wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value comprises:
 determining a condition of a channel to be used for the peer-to-peer communication; and   selecting the first minimum value, the first maximum value, the second minimum value, and the second maximum value based on the determined condition of the channel.   
     
     
         15 . The method of  claim 14 , wherein the channel is a peer-to-peer data channel, a sidelink data channel, a vehicle-to-anything data channel, or any combination thereof. 
     
     
         16 . The method of  claim 11 , wherein the determination of the first minimum value, the first maximum value, the second minimum value, and the second maximum value is based on a condition associated with at least one of the first device or the second device. 
     
     
         17 . The method of  claim 16 , wherein the condition comprises at least one rate of motion of at least one of the first device or the second device.