Uplink resource allocation among different OFDM numerology schemes
The present disclosure relates to a resource allocation procedure, performed between a user equipment and radio base station. The UE is configured with at least one numerology scheme, each associated with parameters partitioning time-frequency radio resources into resource scheduling units differently. The UE is configured with logical channels each of which is associated with at least one numerology scheme. A receiver of the UE receives from the radio base station an uplink scheduling assignment, which indicates uplink radio resources usable by the UE. A processor of the UE determines for which numerology scheme the received uplink scheduling assignment is intended based on the received uplink scheduling assignment. The processor performs a logical channel prioritization procedure by allocating the assigned uplink radio resources to the configured logical channels and by prioritizing those logical channels that are associated with the numerology scheme for which the uplink scheduling assignment is intended.
1. An integrated circuit for controlling a communication apparatus, the integrated circuit comprising:
receiving circuitry, which, in operation,
receives configuration information to configure a logical channel, which is one of a plurality of logical channels and which is associated with at least one of a plurality of different numerology schemes defined to partition time-frequency radio resources into resource scheduling units, and
receives an uplink scheduling assignment from a radio base station, the uplink scheduling assignment indicating uplink radio resources usable by the communication apparatus; and
control circuitry, which is coupled to the receiving circuitry and which, in operation,
determines, based on the uplink scheduling assignment, a numerology scheme, out of the plurality of different numerology schemes, associated with the uplink scheduling assignment, and
performs a logical channel prioritization procedure by selecting the logical channel that is configured to be associated with the numerology scheme for which the received uplink scheduling assignment is intended, and by allocating the uplink radio resources to the logical channel,
wherein the plurality of logical channels include a first logical channel and a second logical channel different from the first logical channel, and the numerology scheme associated with the first logical channel is different from the numerology scheme associated with the second logical channel.
2. The integrated circuit according to claim 1 , wherein the receiving circuitry, in operation, receives information on the plurality of different numerology schemes supported by the radio base station, wherein the information on the plurality of different numerology schemes is received in a system information block broadcast by the radio base station, wherein the information on the plurality of different numerology schemes comprises a numerology layer indication for each numerology scheme.
3. The integrated circuit according to claim 1 , wherein the control circuitry, in operation, determines the numerology scheme associated with the uplink scheduling assignment from at least one of:
a numerology layer indication within the uplink scheduling assignment;
a communication apparatus identity used by the radio base station for encoding the uplink scheduling assignment; or
time-frequency resources used by the radio base station for transmitting the uplink scheduling assignment.
4. The integrated circuit according to claim 1 ,
wherein a different Medium Access Control (MAC) entity in the communication apparatus is configured for and associated with each numerology scheme configured for the communication apparatus, wherein each of the MAC entities in the communication apparatus is responsible for the logical channel prioritization procedure according to the associated numerology scheme, or
wherein a different Medium Access Control (MAC) entity in the communication apparatus is configured for and associated with each data transmission usage scenario of the communication apparatus, wherein each of the MAC entities in the communication apparatus is responsible for the logical channel prioritization procedure according to the associated data transmission usage scenario, wherein each data transmission usage scenario encompasses at least one numerology scheme, wherein the data transmission usage scenario is one of massive machine-type communication (mMTC), enhanced mobile broadband (eMBB), or ultra-reliable low-latency communications (URLLC).
5. The integrated circuit according to claim 1 ,
wherein each of the plurality of logical channels is configured with a resource allocation mode, wherein the resource allocation mode is a radio base station controlled resource allocation mode and/or a fast resource allocation mode,
wherein the control circuitry, in operation, performs the logical channel prioritization procedure by prioritizing the logical channel(s) that are associated with the radio base station controlled resource allocation mode, and
wherein the fast radio resource allocation mode is performed by the communication apparatus autonomously without requesting and receiving an uplink scheduling assignment from the radio base station.
6. The integrated circuit according to claim 1 , wherein separate buffer status reporting configurations and/or triggers for a common buffer status reporting procedure are defined for each numerology scheme configured for the communication apparatus.
7. The integrated circuit according to claim 1 ,
wherein the control circuitry, in operation, performs a separate buffer status reporting procedure for each of the different numerology schemes configured for the communication apparatus,
wherein the control circuitry, when performing the separate buffer status reporting procedure for one of the different numerology schemes, generates a buffer status report that indicates a buffer status of the logical channel(s) associated with that one numerology scheme, and
wherein the integrated circuit comprises transmitting circuitry which, in operation, transmits the separate buffer status report to the radio base station.
8. The integrated circuit according to claim 1 ,
wherein the control circuitry, in operation, performs a common buffer status reporting procedure for all data transmission usage scenarios of the communication apparatus,
wherein the control circuitry, when performing the common buffer status reporting procedure, generates a second common buffer status report that separately indicates a buffer status of the logical channel(s) associated with each data transmission usage scenario,
wherein the integrated circuit comprises transmitting circuitry which, in operation, transmits the generated second common buffer status report to the radio base station, and
wherein each data transmission usage scenario encompasses at least one numerology scheme, wherein each data transmission usage scenario is one of massive machine-type communication (mMTC), enhanced mobile broadband (eMBB), or ultra-reliable low-latency communications (URLLC).
9. The integrated circuit according to claim 1 , wherein the control circuitry, when performing the logical channel prioritization procedure, allocates the uplink radio resources to only the logical channel(s) associated with the determined numerology scheme.
10. The integrated circuit according to claim 1 , wherein the control circuitry, in operation, generates a scheduling request for requesting uplink radio resources from the radio base station, wherein the scheduling request indicates the numerology scheme or a data transmission usage scenario for which the uplink radio resources are requested.