Dynamic random access occasion configuration after a contention
In accordance with example embodiments of the invention there is a method and apparatus to perform at least: receiving from a serving cell of a communication network information comprising a first contention based random access channel configuration and a second random access channel configuration associated with at least a first service, wherein the second random access channel configuration is inactive and whose activation is associated with at least one activation timer; transmitting a first physical random access channel message using a resource of the first contention based random access channel configuration; determining a condition holds after reception of a network message and activating a resource of the second random access channel configuration based on the at least one activation timer; and based on the determining, transmitting a second physical random access channel message using a resource of the second random access channel configuration.
1. An apparatus comprising:
at least one processor and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
receive from a serving cell of a communication network information comprising a first contention based random access channel configuration and a second random access channel configuration associated with at least a first service, wherein the second random access channel configuration is inactive and whose activation is associated with at least one activation timer;
transmit a first physical random access channel message using a resource of the first contention based random access channel configuration;
determine a condition holds after reception of a network message and activating a resource of the second random access channel configuration based on the at least one activation timer; and
based on the determining, transmit a second physical random access channel message using a resource of the second random access channel configuration.
2. The apparatus of claim 1 , wherein determining the condition is based on at least one of a collision detection, random access channel failure or a reception of the network message.
3. The apparatus of claim 1 , wherein the network message is one of a random access response or a contention resolution message.
4. The apparatus of claim 1 , wherein the second random access channel configuration comprises at least one of a contention based resource set or a contention free resource set.
5. The apparatus of claim 4 , wherein the contention based resource set comprises at least one of a contention based resource set comprises contention based resource for reduced capability new radio resource, contention based resource for slice specific transmission resource, contention based resource for coverage enhancement transmission resource or contention based resource for small data transmission resource.
6. The apparatus of claim 1 , wherein based on the condition the at least one activation timer controls when the apparatus is allowed to use the first contention based random access channel configuration and the second random access channel configuration associated with at least a first service.
7. The apparatus of claim 1 , wherein the determining is based on an expiration of the at least one activation timer.
8. The apparatus of claim 1 , wherein the at least one activation timer comprises at least one of a first activation timer, a second activation timer, or a third activation timer.
9. The apparatus of claim 8 , wherein the instructions, when executed by the at least one processor, further cause the apparatus at least to:
enable the contention free resource set based on the first activation timer expiring.
10. The apparatus of claim 8 , wherein the instructions, when executed by the at least one processor, further cause the apparatus at least to:
enable a second contention based resource set based on the second activation timer expiring.
11. The apparatus of claim 1 , wherein the at least one activation timer is reset if the apparatus receives from the network an indication that:
there was no collision in a radio resource control connected state, or contention resolution is for another apparatus in a radio resource control idle state.
12. The apparatus of claim 1 , wherein the first contention based random access channel configuration and the second random access channel configuration are related to at least two services.
13. The apparatus of claim 1 , wherein the network message is indicating at least one of:
a condition can come with the second random access channel configuration and a timer; or
a condition to be evaluated and a second set of random access channel resources to be used.
14. An apparatus comprising:
at least one processor and
at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
send, by a network node of a serving cell of a communication network information to a user equipment comprising a first contention based random access channel configuration and a second random access channel configuration associated with at least a first service, wherein the second random access channel configuration is inactive and whose activation is associated with at least one activation timer;
based on the sending, receive from the user equipment a first physical random access channel message using a resource of the first contention based random access channel configuration;
determine a condition holds after transmission of a network message and activating a resource of the second random access channel configuration based on the at least one activation timer; and
receive a second physical random access channel message using a resource of the second random access channel configuration.
15. The apparatus of claim 14 , wherein the condition is based on at least one of a collision detection, random access channel failure or the transmission of the network message.
16. The apparatus of claim 14 , wherein the second random access channel configuration comprises at least one of a contention based resource set or a contention free resource set.
17. The apparatus of claim 14 , wherein the determining is based on an expiration of the at least one activation timer.
18. The apparatus of claim 14 , wherein the at least one activation timer comprises at least one of a first activation timer, a second activation timer, or a third activation timer.
19. The apparatus of claim 14 , wherein the first contention based random access channel configuration and the second random access channel configuration are related to at least two services.
20. The apparatus of claim 14 , wherein the network message is indicating at least one of:
a condition can come with the second random access channel configuration and a timer; or
a condition to be evaluated and a second set of random access channel resources to be used.