Distributed scheduling to control interference for data transactions using grant-less transmissions

Abstract

Certain aspects of the present disclosure generally relate to techniques for distributed scheduling to control interference for small data transactions using grant-less transmissions. A method for wireless communications by wireless node is provided. The method generally includes receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference, determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter, selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions, and transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.

What is claimed is: 
     
         1 . A method for wireless communications by a wireless node, comprising:
 receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;   determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;   selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and   transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.   
     
     
         2 . The method of  claim 1 , wherein determining the data rate comprises:
 calculating a transmission power associated with each of one or more of the supported MCS; and   selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.   
     
     
         3 . The method of  claim 1 , wherein:
 the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and   determining the duration for the grant-less transmission comprises selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.   
     
     
         4 . The method of  claim 1 , wherein:
 the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and   determining the duration for the grant-less transmission comprises determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.   
     
     
         5 . The method of  claim 1 , wherein:
 the grant-less transmission is transmitted using multiple component carriers (CCs); and   the data rate and the duration for the grant-less transmission are determined per-CC.   
     
     
         6 . The method of  claim 5 , wherein transmitting the grant-less transmission over multiple carriers comprises:
 transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and   transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.   
     
     
         7 . The method of  claim 1 , wherein the grant-less transmission is transmitted using a single component carrier (CC). 
     
     
         8 . The method of  claim 1 , wherein the access resources comprise a scrambling code or an interleaver and access time. 
     
     
         9 . The method of  claim 1 , further comprising including an identification of the wireless node with the grant-less transmission. 
     
     
         10 . An apparatus for wireless communications by a wireless node, comprising:
 a receiver configured to receive, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;   at least one processor configured to determine a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter, and select access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and   a transmitter configured to transmit the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.   
     
     
         11 . The apparatus of  claim 10 , wherein the at least one processor is configured to determine the data rate by:
 calculating a transmission power associated with each of one or more of the supported MCS; and   selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.   
     
     
         12 . The apparatus of  claim 10 , wherein:
 the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and   the at least one processor is configured to determine the duration for the grant-less transmission by selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.   
     
     
         13 . The apparatus of  claim 10 , wherein:
 the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and   the at least one processor is configured to determine the duration for the grant-less transmission by determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.   
     
     
         14 . The apparatus of  claim 10 , wherein:
 the transmitter is configured to transmit the grant-less transmission using multiple component carriers (CCs); and   the at least one processor is configured to determine the data rate and the duration for the grant-less transmission per-CC.   
     
     
         15 . The apparatus of  claim 14 , wherein the transmitter is configured to transmit the grant-less transmission over multiple carriers by:
 transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and   transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.   
     
     
         16 . The apparatus of  claim 10 , wherein the transmitter is configured to transmit the grant-less transmission using a single component carrier (CC). 
     
     
         17 . The apparatus of  claim 10 , wherein the access resources comprise a scrambling code or an interleaver and access time. 
     
     
         18 . The apparatus of  claim 10 , wherein the at least one processor is further configured to include an identification of the wireless node with the grant-less transmission. 
     
     
         19 . An apparatus for wireless communications by a wireless node, comprising:
 means for receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;   means for determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;   means for selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and   means for transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.   
     
     
         20 . The apparatus of  claim 19 , wherein the means for determining the data rate comprises:
 means for calculating a transmission power associated with each of one or more of the supported MCS; and   means for selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.   
     
     
         21 . The apparatus of  claim 19 , wherein:
 the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and   the means for determining the duration for the grant-less transmission comprises means for selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.   
     
     
         22 . The apparatus of  claim 19 , wherein:
 the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and   the means for determining the duration for the grant-less transmission comprises means for determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.   
     
     
         23 . The apparatus of  claim 19 , wherein:
 the grant-less transmission is transmitted using multiple component carriers (CCs); and   the data rate and the duration for the grant-less transmission are determined per-CC.   
     
     
         24 . The apparatus of  claim 23 , wherein the means for transmitting the grant-less transmission over multiple carriers comprises:
 means for transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and   means for transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.   
     
     
         25 . A computer readable medium having computer executable code stored thereon for:
 receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference;   determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter;   selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions; and   transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.   
     
     
         26 . The computer readable medium of  claim 25 , wherein determining the data rate comprises:
 calculating a transmission power associated with each of one or more of the supported MCS; and   selecting an MCS that is associated with a calculated transmission power that does not exceed a transmission power used for the grant-less transmission.   
     
     
         27 . The computer readable medium of  claim 25 , wherein:
 the at least one parameter to control interference comprises a maximum duration for grant-less transmission; and   determining the duration for the grant-less transmission comprises selecting a duration for the grant-less transmission that does not exceed the maximum duration for grant-less transmission.   
     
     
         28 . The computer readable medium of  claim 25 , wherein:
 the at least one parameter to control interference comprises a maximum payload size for grant-less transmission regardless of the selected MCS or a maximum payload size for grant-less transmission at each supported MCS; and   determining the duration for the grant-less transmission comprises determining a duration corresponding to the maximum payload size for the MCS corresponding to the determined data rate.   
     
     
         29 . The computer readable medium of  claim 25 , wherein:
 the grant-less transmission is transmitted using multiple component carriers (CCs); and   the data rate and the duration for the grant-less transmission are determined per-CC.   
     
     
         30 . The computer readable medium of  claim 29 , wherein transmitting the grant-less transmission over multiple carriers comprises:
 transmitting a first portion of the grant-less transmission on a first CC using a first determined data rate and a first determined duration, and   transmitting a second portion of the grant-less transmission on a second CC using a second determined data rate and a second determined duration.