Preempting an allocation of uplink resources
Apparatuses, methods, and systems are disclosed for preempting an uplink resource allocation. One apparatus includes a processor and a transceiver that receives a first allocation of uplink resources in a mobile communication network and receives a second allocation of uplink resources. Here, the second allocation at least partially overlaps in time with the first allocation and the second allocation is received at a later time than the first allocation. The processor determines whether the second allocation is associated with higher priority traffic than the first allocation and preempts the first allocation to generate a TB according to the second allocation in response to the second allocation being associated with higher priority traffic than the first allocation.
1. A method of a user equipment device (“UE”) comprising:
receiving a first allocation of first uplink resources in a mobile communication network, wherein the first allocation comprises a configured grant of semi-persistently scheduled uplink resources;
receiving a second allocation of second uplink resources, wherein the second uplink resources at least partially overlap in time with the first uplink resources, wherein the second allocation comprises a dynamic grant of uplink resource, wherein the second allocation is received at a later time than the first allocation;
identifying a first set of data available for transmission using the first allocation, the first set of data being stored in a buffer of the UE;
identifying a second set of data available for transmission using the second allocation, the second set of data being stored in the buffer;
determining a first priority of the first allocation based on a priority of the first set of data;
determining a second priority of the second allocation based on a priority of the second set of data; and
preempting the first allocation to in response to the second allocation having a higher priority than the first allocation,
wherein preempting the first allocation comprises:
generating a first transmission block (“TB”) from the second set of data according to the second allocation; and
transmitting the first TB using the second uplink resources.
2. The method of claim 1 , wherein the second allocation is indicated using downlink control information (“DCI”).
3. The method of claim 1 , further comprising deferring processing of the first allocation until a predetermined time before a transmission occasion corresponding to the uplink resources of the first allocation.
4. The method of claim 1 , wherein preempting the first allocation comprises:
interrupting generation of a second TB corresponding to the first allocation to generate the first TB; and
resuming generation of the second TB in response to completing generation of the first TB.
5. The method of claim 1 , wherein preempting the first allocation comprises:
determining whether the first allocation corresponds to an initial transmission of data or a retransmission of data;
generating a retransmission TB according to the first allocation in response to the first allocation corresponding to a retransmission of data; and
delivering the retransmission TB to a transmit buffer.
6. The method of claim 5 , wherein preempting the first allocation further comprises ignoring the first allocation in response to the first allocation corresponding to an initial transmission of data.
7. The method of claim 5 , wherein the retransmission TB and the TB corresponding to the second allocation belong to different hybrid automatic repeat request (“HARQ”) processes.
8. The method of claim 5 , wherein the first allocation is indicated using first downlink control information (“DCI”), and wherein determining whether the first allocation corresponds to an initial transmission of data or a retransmission of data comprises examining a new data indicator (“NDI”) field of the first DCI.
9. An apparatus comprising:
a transceiver that:
receives a first allocation of first uplink resources in a mobile communication network, wherein the first allocation comprises a configured grant of semi-persistently scheduled uplink resources; and
receives a second allocation of second uplink resources, wherein the second uplink resources at least partially overlap in time with the first uplink resources, wherein the second allocation comprises a dynamic grant of uplink resource, wherein the second allocation is received at a later time than the first allocation; and
a processor that:
identifies a first set of data available for transmission using the first allocation, the first set of data being stored in a buffer of the apparatus;
identifies a second set of data available for transmission using the second allocation, the second set of data being stored in the buffer;
determines a first priority of the first allocation based on a priority of the first set of data;
determines a second priority of the second allocation based on a priority of the second set of data; and
preempts the first allocation to in response to the second allocation having a higher priority than the first allocation,
wherein preempting the first allocation comprises:
generating a first transmission block (“TB”) from the second set of data according to the second allocation; and
transmitting the first TB using the second uplink resources.
10. The apparatus of claim 9 , wherein the second allocation is indicated using downlink control information (“DCI”).
11. The apparatus of claim 9 , further comprising deferring processing of the first allocation until a predetermined time before a transmission occasion corresponding to the uplink resources of the first allocation.
12. The apparatus of claim 9 , wherein preempting the first allocation comprises:
interrupting generation of a second TB corresponding to the first allocation to generate the first TB; and
resuming generation of the second TB in response to completing generation of the first TB.
13. The apparatus of claim 9 , wherein preempting the first allocation comprises:
determining whether the first allocation corresponds to an initial transmission of data or a retransmission of data;
generating a retransmission TB according to the first allocation in response to the first allocation corresponding to a retransmission of data; and
delivering the retransmission TB to a transmit buffer.
14. The apparatus of claim 13 , wherein preempting the first allocation further comprises ignoring the first allocation in response to the first allocation corresponding to an initial transmission of data.
15. The apparatus of claim 13 , wherein the retransmission TB and the TB corresponding to the second allocation belong to different hybrid automatic repeat request (“HARQ”) processes.
16. The apparatus of claim 13 , wherein the first allocation is indicated using first downlink control information (“DCI”), and wherein determining whether the first allocation corresponds to an initial transmission of data or a retransmission of data comprises examining a new data indicator (“NDI”) field of the first DCI.