Techniques for prioritizing multiple sets of random access channel parameters

Patent metadata

Field	Value
Publication number	US-2022408498-A1
Application number	US-202217898231-A
Country	US
Kind code	A1
Filing date	Aug 29, 2022
Priority date	Mar 31, 2021
Publication date	Dec 22, 2022
Grant date	—

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of a configuration for multiple sets of prioritization parameters for a random access channel (RACH) procedure. A first set of prioritization parameters of the multiple sets of prioritization parameters may be associated with a higher priority network slice than the other sets of prioritization parameters (e.g., than the remaining sets of prioritization parameters). The UE may detect a trigger to perform a RACH procedure and select the first set of prioritization parameters for the RACH procedure based on the first set of prioritization parameters being associated with the higher priority network slice. The UE may perform the RACH procedure for the network slice according to the first set of prioritization parameters.

First claim

What is claimed is:

1 . A method for wireless communication at a user equipment (UE), comprising:
receiving an indication of a configuration for a plurality of sets of prioritization parameters for a random access channel procedure, wherein a first set of prioritization parameters of the plurality of sets of prioritization parameters is associated with a higher priority network slice than a remainder of the plurality of sets of prioritization parameters; selecting the first set of prioritization parameters from the plurality of sets of prioritization parameters based at least in part on the first set of prioritization parameters being associated with the higher priority network slice and on a trigger to perform the random access channel procedure for a network slice; and performing the random access channel procedure for the network slice according to the first set of prioritization parameters.

2 . The method of claim 1 , further comprising:
receiving an indication of corresponding priorities for each set of prioritization parameters of the plurality of sets of prioritization parameters, wherein the first set of prioritization parameters is selected based at least in part on receiving the indication of the corresponding priorities for each set of prioritization parameters of the plurality of sets of prioritization parameters.

3 . The method of claim 2 , wherein receiving the indication of the corresponding priorities comprises:
receiving the indication of the corresponding priorities for each set of prioritization parameters via system information, radio resource control signaling, non-access stratum signaling, or any combination thereof.

4 . The method of claim 1 , wherein receiving the indication of the configuration comprises:
receiving the indication of the configuration via a system information block, radio resource control signaling, non-access stratum signaling, or any combination thereof.

5 . The method of claim 1 , wherein each set of prioritization parameters of the plurality of sets of prioritization parameters is associated with a handover procedure, a beam failure recovery procedure, multimedia priority service signaling, mission critical service signaling, one or more access identities, one or more network slices, or one or more access categories, or any combination thereof.

6 . The method of claim 1 , further comprising:
receiving, via a system information block, a first indication of a first priority for the first set of prioritization parameters; and receiving, via radio resource control signaling, a second indication of a second priority for the first set of prioritization parameters, wherein the random access channel procedure is performed according to the first set of prioritization parameters based at least in part on receiving the second indication of the second priority.

7 . The method of claim 1 , wherein each of the sets of prioritization parameters includes a preamble ramping step, a backoff scaling factor, a listen before talk configuration, or a channel access priority, or any combination thereof.

8 . The method of claim 1 , further comprising:
identifying one or more prioritization parameters of the first set of prioritization parameters based at least in part on the indication of the configuration; and determining one or more cell-specific parameters for a remaining one or more prioritization parameters of the first set of prioritization parameters, wherein the random access channel procedure is performed based at least in part on the determining.

9 . The method of claim 1 , further comprising:
receiving, from a base station, an indication of the higher priority network slice and the first set of prioritization parameters, wherein the first set of prioritization parameters is selected based at least in part on receiving the indication.

10 . The method of claim 1 , further comprising:
determining a priority ordering for the plurality of sets of prioritization parameters, wherein the priority ordering includes multimedia priority service and mission critical service random access channel procedures as a first priority, a network slice-specific and access category-specific random access channel procedures as a second priority lower than the first priority, an access identity-specific random access channel procedures as a third priority lower than the second priority, and a handover-specific and beam failure recovery-specific random access channel procedures as a fourth priority lower than the third priority.

11 . The method of claim 1 , wherein the configuration for the plurality of sets of prioritization parameters indicates a corresponding network slice for each set of prioritization parameters based at least in part on network slice selection assistance information, a single network slice selection assistance information, a slice or service type, a set of single network slice selection assistance information, or any combination thereof.

12 . A method for wireless communication at a base station, comprising:
transmitting, to a user equipment (UE), an indication of a configuration for a plurality of sets of prioritization parameters for a random access channel procedure, wherein a first set of prioritization parameters of the plurality of sets of prioritization parameters is associated with a higher priority network slice than a remainder of the plurality of sets of prioritization parameters; determining the first set of prioritization parameters from the plurality of sets of prioritization parameters based at least in part on the first set of prioritization parameters being associated with the higher priority network slice and a trigger to perform the random access channel procedure for a network slice; and performing the random access channel procedure with the UE for the network slice according to the first set of prioritization parameters.

13 . The method of claim 12 , further comprising:
transmitting an indication of corresponding priorities for each set of prioritization parameters of the plurality of sets of prioritization parameters, wherein the first set of prioritization parameters is determined based at least in part on the corresponding priorities for each set of prioritization parameters of the plurality of sets of prioritization parameters.

14 . The method of claim 13 , wherein transmitting the indication of the corresponding priorities comprises:
transmitting the indication of the corresponding priorities for each set of prioritization parameters via system information, radio resource control signaling, non-access stratum signaling, or any combination thereof.

15 . The method of claim 12 , wherein transmitting the indication of the configuration comprises:
transmitting the indication of the configuration via a system information block, radio resource control signaling, non-access stratum signaling, or any combination thereof.

16 . The method of claim 12 , wherein each set of prioritization parameters of the plurality of sets of prioritization parameters is associated with a handover procedure, a beam failure recovery procedure, multimedia priority service signaling, mission critical service signaling, one or more access identities, one or more network slices, or one or more access categories, or any combination thereof.

17 . The method of claim 12 , further comprising:
transmitting, via a system information block, a first indication of a first priority for the first set of prioritization parameters; and transmitting, via radio resource control signaling, a second indication of a s

Assignees

• Qualcomm Inc

Inventors

• Cheng Peng
• He Linhai
• Liu Jianhua
• Ozturk Ozcan

Classifications

• H04W76/20

  Manipulation of established connections · CPC title

• H04W74/0875 Primary

  with assigned priorities based access · CPC title

• H04W74/0816

  with collision avoidance · CPC title

• H04W76/19

  Connection re-establishment · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title