Apparatus and method for radio resource management for high reliability and low latency traffic
Embodiments are provided for managing and mitigation contention of high reliability and low latency transmissions in wireless communications networks. According to an embodiment, a network entity indicates a first grant to a first device associated with a first service. The first grant includes a first resource for transmitting for the first service and a second resource for retransmitting for the first service. The network entity also indicates a second grant to a second device associated with a second service. The second grant includes the first resource for transmitting for the second service and a third resource for retransmitting for the second service. A third grant is also indicated to a third device associated with a third service. The third grant includes the first resource for transmitting for the third service. The first service and the second service have higher transmission reliability and latency requirements than the third service.
1. A method for managing wireless transmissions from multiple transmitters, the method comprising:
sending, by a network entity, a first grant to a first device associated with a first service, the first grant assigning a first resource for data transmissions associated with the first service and a second resource for data retransmissions associated with the first service, the first resource being a contention-based resource;
sending, by the network entity, a second grant to a second device associated with a second service, the second grant assigning the first resource for data transmissions associated with the second service and a third resource for data retransmissions associated with the second service; and
sending, by the network entity, a third grant to a third device associated with a third service, the third grant assigning the first resource for data transmissions associated with the third service without assigning any resources for data retransmissions associated with the third service, wherein the first service and the second service having higher transmission reliability requirements than the third service.
2. The method of claim 1 , wherein the first service and the second service have shorter transmission latency requirements than the third service.
3. The method of claim 1 , wherein the data transmissions associated with the first service and the data transmissions associated with the second service have a higher transmit power level setting than the data transmissions associated with the third service to increase the likelihood that the data transmissions associated with the first service and the data transmissions associated with the second service will be successfully received in the event they collide with the data transmissions associated with the third service.
4. The method of claim 1 , wherein the first grant, the second grant, and the third grant assign the first resource, as the contention-based resource, to the data transmissions associated with the first service, the data transmission associated with the second service, and the data transmission associated with the third service without scheduling transmissions of the first device, the second device, and the third device.
5. The method of claim 1 further comprising:
sending to the first device updates for the first grant for the first service upon the first device changing its scheduler entity; and
sending to the second device updates for the second grant for the second service upon the second device changing its scheduler entity.
6. The method of claim 5 , wherein the updates for the first grant and the second grant indicate measured channel conditions for the first service and the second service or changes of modulation and coding scheme (MCS) settings for the first service and the second service.
7. The method of claim 1 further comprising:
upon establishing the first service and the second service, performing an authorization procedure of the first device for the first service and of the second device for the second service; and
upon successful authorization of the first device and the second device, registering the first device with the first service and registering the second device with the second service.
8. The method of claim 1 , wherein the first resource, the second resource, and the third resource are time resources, frequency resources, code resources, or combinations thereof.
9. The method of claim 1 , wherein the first resource, the second resource, and the third resource are transmission time intervals (TTIs) or symbols within TTIs.
10. A network entity for managing wireless transmissions from multiple transmitters, the network entity comprising:
at least one processor coupled to a memory; and
a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to:
send a first grant to a first device associated with a first service, the first grant assigning a first resource for data transmissions associated with the first service and a second resource for data retransmissions associated with the first service, the first resource being a contention-based resource;
send a second grant to a second device associated with a second service, the second grant assigning the first resource for data transmissions associated with the second service and a third resource for data retransmissions associated with the second service; and
send a third grant to a third device associated with a third service, the third grant assigning the first resource for data transmissions associated with the third service without assigning any resources for data retransmissions associated with the third service, wherein the first service and the second service have higher transmission reliability requirements than the third service.
11. The network entity of claim 10 , wherein the first service and the second service have shorter transmission latency requirements than the third service.
12. The network entity of claim 10 , wherein the data transmissions associated with the first service and the data transmissions associated with the second service have a higher transmit power setting than the data transmissions associated with the third service to increase the likelihood that the data transmissions associated with the first service and the data transmissions associated with the second service will be successfully received in the event they collide with the data transmissions associated with the third service.
13. The network entity of claim 10 , wherein the first grant is sent to the first device and the second grant is sent to the second device without scheduling transmissions for the first device and the second device.
14. The network entity of claim 10 , wherein the programming further includes instructions to:
send to the first device updates for the first grant for the first service upon the first device changing its scheduler entity; and
send to the second device updates for the second grant for the second service upon the second device changing its scheduler entity.
15. The network entity of claim 14 , wherein the updates for the first grant and the second grant indicate measured channel conditions for the first service and the second service or changes of a modulation and coding scheme (MCS) settings for the first service and the second service.
16. The network entity of claim 10 , wherein the programming further includes instructions to:
upon establishing the first service and the second service, perform an authorization procedure of the first device for the first service and of the second device for the second service; and
upon successful authorization of the first device and the second device, register the first device with the first service and registering the second device with the second service.
17. The network entity of claim 10 , wherein the first resource, the second resource, and the third resource are time resources, frequency resources, code resources, or combinations thereof.
18. The network entity of claim 10 , wherein the first resource, the second resource, and the third resource are transmission time intervals (TTIs) or symbols within TTIs.
19. The network entity of claim 10 , wherein the data transmissions associated with the first service and the data transmissions associated with the second service have a higher modulation and coding scheme (MCS) setting than the data transmissions associated with the third service to increase the likelihood that the data transmissions associated with the first service and the data transmissions associated with the second service will be successfully received in the event they collide with the data transmissions associated with the third service.
20. The network entity of claim 10 , wherein the first grant, the second grant, and the third grant assign the first resource, as the contention-based resource, to the data transmissions associated with the first service, the data transmission associated with the second service, and the data transmission associated with the third service without scheduling transmissions of the first device, the second device, and the third device.
21. The method of claim 1 , wherein the data transmissions associated with the first service and the data transmissions associated with the second service have a higher modulation and coding scheme (MCS) setting than the data transmissions associated with the third service to increase the likelihood that the data transmissions associated with the first service and the data transmissions associated with the second service will be successfully received in the event they collide with the data transmissions associated with the third service.