Logical channel prioritization and mapping to different numerologies
Logical channel prioritization and mapping to different numerologies is disclosed for 5G networks having multiple network slices operable for communication via logical channels associated with different numerologies. For user equipments (UEs) configured to handle multiple numerologies, different rules for mapping logical channels associated with different numerologies may be defined for data and non-data channels. Thus, when new data arrives at a UE for communication via a logical channel associated with a different numerology, the UE checks whether the mapping rules would allow multiplexing of the new numerology data onto an existing data channel. If no data channel has already been allocated or if an allocated data channel may not include data from the new numerology, then a mapping is followed for specifically requesting resources for communication of the new numerology data. The new mapping may trigger scheduling request or random access procedures specifically associated with the new numerology.
1. A method of wireless communication, comprising:
obtaining data at a user equipment (UE) for uplink communications, wherein the data is identified for transmission on a first logical channel, and wherein the first logical channel is associated with a first numerology;
transmitting a resource allocation request, from the UE to a serving base station via a non-data channel, to request uplink resources for uplink communications on the first logical channel, wherein the uplink resources are configured for the first logical channel according to a first mapping;
receiving an uplink grant of the uplink resources; and
transmitting the data on the first logical channel via the uplink resources using the first numerology.
2. The method of claim 1 ,
wherein the non-data channel includes one of: an uplink control channel for scheduling requests, a random access channel, or an on-demand system information messaging; and
wherein the resource allocation request is transmitted on the uplink control channel when the uplink control channel is allocated for the UE and the resource allocation request is transmitted on the random access channel when the uplink control channel is unallocated for the UE.
3. The method of claim 1 , wherein the first logical channel and first numerology are one of:
indicated in one of a minimum system information messaging or the on-demand system information messaging;
derived through a numerology of synchronization signals; or
stored in memory at the UE as standardized functionality.
4. The method of claim 1 , further including:
determining, at the UE prior to the transmitting the resource allocation request, a data channel is inactive for the UE.
5. The method of claim 4 , further including:
determining, at the UE prior to the transmitting the resource allocation request, the data channel is active for the UE;
determining, at the UE, whether the data channel is configured to include transmission of the first logical channel according to a second mapping;
in response to the data channel being configured to include transmission of the first logical channel,
refraining, by the UE, from performing the transmitting the resource allocation request, the receiving the uplink grant, and the transmitting data via the uplink resources when the data channel is configured to include the transmission of the first logical channel; and
transmitting, by the UE, the data on the first logical channel via the data channel using the first numerology.
6. The method of claim 5 , further including:
in response to the data channel not being configured to include transmission of the first logical channel performing the transmitting the resource allocation, the receiving the uplink grant, and the transmitting the data via the uplink resources.
7. The method of claim 5 , wherein the second mapping is different from the first mapping.
8. The method of claim 1 , wherein the first numerology includes one of:
a transmission time interval (TTI) duration parameter;
a number of symbols parameter;
a subcarrier spacing parameter;
a cyclic prefix (CP) duration parameter;
a CP overhead parameter; or
a number of resource elements (REs) per TTI parameter.
9. The method of claim 8 , wherein the first numerology includes the TTI duration parameter.
10. An apparatus configured for wireless communication, comprising:
means for obtaining data at a user equipment (UE) for uplink communications, wherein the data is identified for transmission on a first logical channel, and wherein the first logical channel is associated with a first numerology;
means for transmitting a resource allocation request, from the UE to a serving base station via a non-data channel, to request uplink resources for uplink communications on the first logical channel, wherein the uplink resources are configured for the first logical channel according to a first mapping;
means for receiving an uplink grant of the uplink resources; and
means for transmitting the data on the first logical channel via the uplink resources using the first numerology.
11. The apparatus of claim 10 ,
wherein the non-data channel includes one of: an uplink control channel for scheduling requests, a random access channel, or an on-demand system information messaging; and
wherein the resource allocation request is transmitted on the uplink control channel when the uplink control channel is allocated for the UE and the resource allocation request is transmitted on the random access channel when the uplink control channel is unallocated for the UE.
12. The apparatus of claim 10 , wherein the first logical channel and first numerology are one of:
indicated in one of a minimum system information messaging or the on-demand system information messaging;
derived through a numerology of synchronization signals; or
stored in memory at the UE as standardized functionality.
13. The apparatus of claim 10 , further including:
means for determining, at the UE prior to execution of the means for transmitting the resource allocation request, a data channel is inactive for the UE.
14. The apparatus of claim 13 , further including:
means for determining, at the UE prior to execution of the means for transmitting the resource allocation request, the data channel is active for the UE;
means for determining, at the UE, whether the data channel is configured to include transmission of the first logical channel according to a second mapping;
means, executable in response to the data channel being configured to include transmission of the first logical channel,
for refraining, by the UE, from performing the means for transmitting the resource allocation request, the means for receiving the uplink grant, and the means for transmitting data via the uplink resources when the data channel is configured to include the transmission of the first logical channel; and
means for transmitting, by the UE, the data on the first logical channel via the data channel using the first numerology.
15. The apparatus of claim 14 , further including:
means, executable in response to the data channel not being configured to include transmission of the first logical channel, for performing the means for transmitting the resource allocation, the means for receiving the uplink grant, and the means for transmitting the data via the uplink resources.
16. The apparatus of claim 14 , wherein the second mapping is different from the first mapping.
17. The apparatus of claim 10 , wherein the first numerology includes one of:
a transmission time interval (TTI) duration parameter;
a number of symbols parameter;
a subcarrier spacing parameter;
a cyclic prefix (CP) duration parameter;
a CP overhead parameter; or
a number of resource elements (REs) per TTI parameter.
18. The apparatus of claim 17 , wherein the first numerology includes the TTI duration parameter.
19. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:
program code executable by a computer for causing the computer to obtain data at a user equipment (UE) for uplink communications, wherein the data is identified for transmission on a first logical channel, and wherein the first logical channel is associated with a first numerology;
program code executable by the computer for causing the computer to transmit a resource allocation request, from the UE to a serving base station via a non-data channel, to request uplink resources for uplink communications on the first logical channel, wherein the uplink resources are configured for the first logical channel according to a first mapping;
program code executable by the computer for causing the computer to receive an uplink grant of the uplink resources; and
program code executable by the computer for causing the computer to transmit the data on the first logical channel via the uplink resources using the first numerology.
20. An apparatus configured for wireless communication, the apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor,
wherein the at least one processor is configured:
to obtain data at a user equipment (UE) for uplink communications, wherein the data is identified for transmission on a first logical channel, and wherein the first logical channel is associated with a first numerology;
to transmit a resource allocation request, from the UE to a serving base station via a non-data channel, to request uplink resources for uplink communications on the first logical channel, wherein the uplink resources are configured for the first logical channel according to a first mapping;
to receive an uplink grant of the uplink resources; and
to transmit the data on the first logical channel via the uplink resources using the first numerology.
21. The apparatus of claim 20 ,
wherein the non-data channel includes one of: an uplink control channel for scheduling requests, a random access channel, or an on-demand system information messaging; and
wherein the resource allocation request is transmitted on the uplink control channel when the uplink control channel is allocated for the UE and the resource allocation request is transmitted on the random access channel when the uplink control channel is unallocated for the UE.
22. The apparatus of claim 20 , wherein the first logical channel and first numerology are one of:
indicated in one of a minimum system information messaging or the on-demand system information messaging;
derived through a numerology of synchronization signals; or
stored in memory at the UE as standardized functionality.
23. The apparatus of claim 20 , further including configuration of the at least one processor to determine, at the UE prior to execution of the configuration of the at least one processor to transmit the resource allocation request, a data channel is inactive for the UE.
24. The apparatus of claim 23 , further including configuration of the at least one processor:
to determine, at the UE prior to execution of the configuration to transmit the resource allocation request, the data channel is active for the UE;
to determine, at the UE, whether the data channel is configured to include transmission of the first logical channel according to a second mapping;
in response to the data channel being configured to include transmission of the first logical channel,
to refrain, by the UE, from performing the transmitting the resource allocation request, the receiving the uplink grant, and the transmitting data via the uplink resources when the data channel is configured to include the transmission of the first logical channel; and
to transmit, by the UE, the data on the first logical channel via the data channel using the first numerology.
25. The apparatus of claim 24 , further including configuration of the at least one processor in response to the data channel not being configured to include transmission of the first logical channel to execute the configuration to transmit the resource allocation, the configuration to receive the uplink grant, and the configuration to transmit the data via the uplink resources.
26. The apparatus of claim 24 , wherein the second mapping is different from the first mapping.
27. The apparatus of claim 20 , wherein the first numerology includes one of:
a transmission time interval (TTI) duration parameter;
a number of symbols parameter;
a subcarrier spacing parameter;
a cyclic prefix (CP) duration parameter;
a CP overhead parameter; or
a number of resource elements (REs) per TTI parameter.
28. The apparatus of claim 27 , wherein the first numerology includes the TTI duration parameter.