Method and apparatus for determining network slice priority in wireless communication system
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure suggests a method and apparatus for determining a network slice priority in a wireless communication system according to an embodiment. The method comprises: receiving, from a second node, a first message for requesting slice priority related information; obtaining the slice priority related information for a slice priority corresponding to a network slice access stratum group (NSAG); and transmitting, to the second node, a second message including the slice priority related information in response to receiving the first message.
1 . A method of a network data analytics function (NWDAF) entity in a wireless communication system, the method comprising:
receiving, from an access and mobility management function (AMF) entity, a first message for requesting slice priority related information;
identifying the slice priority related information for a slice priority corresponding to a network slice access stratum group (NSAG);
identifying NSAG information including the slice priority, wherein the NSAG information corresponding to the NSAG is calculated based on a set of timing advances (TAs) associated with a mapping between a slice group identifier (ID) and single network slice selection assistance information (S-NSSAI); and
transmitting, to the AMF entity, a second message including the slice priority related information in response to receiving the first message.
2 . The method of claim 1 , wherein the first message includes at least one of a user equipment (UE) ID, a UE group ID, the slice group ID, the S-NSSAI, or a network slice instance (NSI) ID, and
wherein the slice priority related information includes at least one of the UE ID, a list of group ID including the UE, a cell reselection priority per S-NSSAI, a cell reselection priority per NSAG, average slice priority per location, or average slice priority per UE group ID.
3 . The method of claim 1 , further comprising:
transmitting, to a third node, a third message for requesting data for the slice priority related information based on the first message; and
receiving, from the third node, a fourth message including the data for the slice priority related information based on the third message.
4 . The method of claim 3 , wherein the third message includes at least one of a UE ID, a UE group ID, a slice group ID, the S-NSSAI, or NSI ID, and
wherein the data includes at least one of a UE ID, a list of group ID including the UE, slice priority including cell reselection priority per S-NSSAI, cell reselection priority per NSAG, mapping information between S-NSSAI and NSAG, a list of data network name (DNN) and S-NSSAI for the UE, slice load information, average slice priority per location, or average slice priority per UE group ID.
5 . A method performed by an access and mobility management function (AMF) entity in a wireless communication system, the method comprising:
receiving, from a user equipment (UE), a registration request message;
transmitting, to a network data analytics function (NWDAF) entity, an analytics information request message for requesting slice priority related information;
as a response to the analytics information request message, receiving, from the NWDAF entity, an analytics information response message including the slice priority related information for a slice priority corresponding to a network slice access stratum group (NSAG);
based on the slice priority related information, determining a slice priority corresponding to the NSAG for the user equipment (UE); and
as a response to the registration request message, transmitting, to the UE, a registration response message including NSAG information, wherein the NSAG information includes the slice priority corresponding to the NSAG for the UE and a mapping relationship between an NSAG ID and single network slice selection assistance information (S-NSSAI), and
wherein the slice priority corresponding to the NSAG for the UE is for performing a cell reselection.
6 . The method of claim 5 , wherein the NSAG information is calculated based on a set of timing advances (TAs) associated with a mapping between an NSAG ID and the S-NSSAI.
7 . The method of claim 5 , wherein the analytics information request message includes an analytics ID, a target of analytics reporting, an analytics target period, analytics filter information, and
wherein the slice priority related information includes at least one of a UE ID, a list of group IDs including the UE, a slice priority per NSAG, an average slice priority per location, or an average slice priority per UE group ID.
8 . The method of claim 5 , wherein the slice priority related information is obtained based on data for the slice priority related information, and
wherein the data includes a UE ID, a list of group IDs including the UE, a slice priority per NSAG, an average slice priority per location, or an average slice priority per UE group ID.
9 . The method of claim 5 , wherein the registration request message includes UE capability information for supporting the NSAG.
10 . A network data analytics function (NWDAF) entity in a wireless communication system, the NWDAF entity comprising:
a transceiver; and
a controller coupled with the transceiver, and configured to:
receive, from an access and mobility management function (AMF) entity, a first message for requesting slice priority related information,
identify the slice priority related information for a slice priority corresponding to a network slice access stratum group (NSAG), identify NSAG information including the slice priority, the NSAG information corresponding to the NSAG is calculated based on a set of timing advances (TAs) associated with a mapping between a slice group identifier (ID) and single network slice selection assistance information (S-NSSAI), and
transmit, to the AMF entity, a second message including the slice priority related information in response to receiving the first message.
11 . The NWDAF entity of claim 10 , wherein the first message includes at least one of a user equipment (UE) ID, a UE group ID, the slice group ID, the S-NSSAI, or a network slice instance (NSI) ID, and
wherein the slice priority related information includes at least one of the UE ID, a list of group ID including the UE, a cell reselection priority per S-NSSAI, a cell reselection priority per NSAG, average slice priority per location, or average slice priority per UE group ID.
12 . The NWDAF entity of claim 10 , wherein the controller is further configured to:
transmit, to a third node, a third message for requesting data for the slice priority related information based on the first message; and
receive, from the third node, a fourth message including the data for the slice priority related information based on the third message.
13 . The NWDAF entity of claim 12 , wherein the third message includes at least one of a UE ID, a UE group ID, a slice group ID, a S-NSSAI, or NSI ID, and
wherein the data includes at least one of a UE ID, a list of group ID including the UE, slice priority including cell reselection priority per S-NSSAI, cell reselection priority per NSAG, mapping information between S-NSSAI and NSAG, a list of data network name (DNN) and S-NSSAI for the UE, slice load information, average slice priority per location, or average slice priority per UE group ID.
14 . An access and mobility management function (AMF) entity in a wireless communication system, the AMF entity comprising:
a transceiver, and
a controller coupled with the transceiver, and configured to:
receive, from a user equipment (UE), a registration request message,
transmit, to a network data analytics function (NWDAF) entity, an analytics information request message for requesting slice priority related information,
as a response to the analytics information request message, receive, from the NWDAF entity, an analytics information response message including the slice priority related information for a slice priority corresponding to a network slice access stratum group (NSAG),
based on the slice priority related information, determine a slice priority corresponding to the NSAG for the user equipment (UE), and
as a response to the registration request message, transmit, to the UE, a registration response message including NSAG information, wherein the NSAG information includes the slice priority corresponding to the NSAG for the UE and a mapping relationship between an NSAG ID and single network slice selection assistance information (S-NSSAI), and
wherein the slice priority corresponding to the NSAG for the UE is for performing a cell reselection.
15 . The AMF entity of claim 14 , wherein the NSAG information is calculated based on a set of timing advances (TAs) associated with a mapping between an NSAG ID and the S-NSSAI.
16 . The AMF entity of claim 14 , wherein the analytics information request message includes an analytics ID, a target of analytics reporting, an analytics target period, analytics filter information, and
wherein the slice priority related information includes at least one of a UE ID, a list of group IDs including the UE, a slice priority per NSAG, an average slice priority per location, or an average slice priority per UE group ID.
17 . The AMF entity of claim 14 , wherein the slice priority related information is obtained based on data for the slice priority related information, and
wherein the data includes a UE ID, a list of group IDs including the UE, a slice priority per NSAG, an average slice priority per location, or an average slice priority per UE group ID.
18 . The AMF entity of claim 14 , wherein the registration request message includes UE capability information for supporting the NSAG.