Handling slice limitations
Methods, systems, and devices for wireless communications are described. Generally, the described techniques at a network provide for efficiently considering parameters of a network slice when determining whether to provide access to the network slice, allow the establishment of a session via the network slice, or grant access to resources for communications via the network slice. Further, the described techniques at a user equipment (UE) provide for efficiently determining when or whether to retry to access a network slice, retry to establish a session via the network slice, or retry to access resources for communicating via the network slice.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
one or more memories storing processor-executable code; and
one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:
send, to a network entity, a first request for access to a network slice of a plurality of network slices, the first request comprising an identifier of the network slice;
receive, in a first control message from the network entity, an indication of a cause for rejecting access to the network slice; and
receive, in the first control message, one or more single network slice selection assistance information (S-NSSAI) values and one or more tracking area identity values associated with the one or more S-NSSAI values, wherein the one or more tracking area identity values correspond to a second geographic coverage area where access to the network slice is allowed based at least in part on a UE route selection policy (URSP), and wherein the second geographic coverage area is different from a first geographic coverage area where access to the network slice is rejected.
2 . The apparatus of claim 1 , wherein the second geographic coverage area is a portion of the first geographic coverage area.
3 . The apparatus of claim 1 , wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:
send, to the network entity, a second request for access to the network slice based at least in part on a satisfaction of at least one condition for retrying to access the network slice; and
receive, from the network entity, a second control message indicating that access to the network slice is allowed.
4 . The apparatus of claim 3 , wherein the at least one condition comprises whether a backoff timer associated with the network slice has expired.
5 . The apparatus of claim 3 , wherein the at least one condition comprises whether the UE is within the second geographic coverage area for the network slice.
6 . The apparatus of claim 1 , wherein the cause for rejecting access to the network slice comprises an indication that a session and service continuity (SSC) mode is unsupported.
7 . The apparatus of claim 1 , wherein the cause for rejecting access to the network slice comprises an indication that a maximum quantity of protocol data unit (PDU) sessions for the network slice is reached.
8 . A method for wireless communication at a user equipment (UE), comprising:
sending, to a network entity, a first request for access to a network slice of a plurality of network slices, the first request comprising an identifier of the network slice;
receiving, in a first control message from the network entity, an indication of a cause for rejecting access to the network slice; and
receiving, in the first control message, one or more single network slice selection assistance information (S-NSSAI) values and one or more tracking area identity values associated with the one or more S-NSSAI values, wherein the one or more tracking area identity values correspond to a second geographic coverage area where access to the network slice is allowed based at least in part on a UE route selection policy (URSP), and wherein the second geographic coverage area is different from a first geographic coverage area where access to the network slice is rejected.
9 . The method of claim 8 , wherein the second geographic coverage area is a portion of the first geographic coverage area.
10 . The method of claim 8 , further comprising:
sending, to the network entity, a second request for access to the network slice based at least in part on a satisfaction of at least one condition for retrying to access the network slice; and
receiving, from the network entity, a second control message indicating that access to the network slice is allowed.
11 . The method of claim 10 , wherein the at least one condition comprises whether a backoff timer associated with the network slice has expired.
12 . The method of claim 10 , wherein the at least one condition comprises whether the UE is within the second geographic coverage area for the network slice.
13 . The method of claim 8 , wherein the cause for rejecting access to the network slice comprises an indication that a session and service continuity (SSC) mode is unsupported.
14 . The method of claim 8 , wherein the cause for rejecting access to the network slice comprises an indication that a maximum quantity of protocol data unit (PDU) sessions for the network slice is reached.
15 . A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to:
send, to a network entity, a first request for access to a network slice of a plurality of network slices, the first request comprising an identifier of the network slice;
receive, in a first control message from the network entity, an indication of a cause for rejecting access to the network slice; and
receive, in the first control message, one or more single network slice selection assistance information (S-NSSAI) values and one or more tracking area identity values associated with the one or more S-NSSAI values, wherein the one or more tracking area identity values correspond to a second geographic coverage area where access to the network slice is allowed based at least in part on a user equipment (UE) route selection policy (URSP), and wherein the second geographic coverage area is different from a first geographic coverage area where access to the network slice is rejected.
16 . The non-transitory computer-readable medium of claim 15 , wherein the second geographic coverage area is a portion of the first geographic coverage area.
17 . The non-transitory computer-readable medium of claim 15 , wherein the instructions are further executable by the one or more processors to:
send, to the network entity, a second request for access to the network slice based at least in part on a satisfaction of at least one condition for retrying to access the network slice; and
receive, from the network entity, a second control message indicating that access to the network slice is allowed.
18 . The non-transitory computer-readable medium of claim 17 , wherein the at least one condition comprises whether a backoff timer associated with the network slice has expired.
19 . The non-transitory computer-readable medium of claim 17 , wherein the at least one condition comprises whether a user equipment (UE) is within the second geographic coverage area for the network slice.
20 . The non-transitory computer-readable medium of claim 15 , wherein the cause for rejecting access to the network slice comprises an indication that a session and service continuity (SSC) mode is unsupported.