Apparatus and method for controlling network slice data rate in wireless communication system
The disclosure relates to a 5 th generation (5G) or pre-5G communication system for supporting a higher data rate after a 4 th generation (4G) communication system such as long term evolution (LTE). According to various embodiments, a method for operating a network node in a wireless communication system is provided. The method comprises obtaining slice policy information including a maximum data rate, monitoring a data rate of protocol data unit (PDU) sessions associated with the slice, determining whether a sum of data rates of PDU sessions associated with the slice exceeds the maximum data rate, transmitting, to a second network node, a policy enforcement request message for controlling the sum of data rates of the PDU sessions associated with the slice.
1 . A method for operating a policy control function (PCF) in a wireless communication system, the method comprising:
obtaining network slice related policy information including a maximum data rate for a network slice of a single-network slice selection assistance information (S-NSSAI), wherein the maximum data rate includes a maximum bit rate (MBR) of guaranteed bitrate (GBR) Quality of Service (QOS) flows and an aggregate maximum bit rate (AMBR) of non-guaranteed bitrate (non-GBR) QoS flows;
monitoring a data rate associated with the network slice;
determining whether the data rate associated with the network slice exceeds the maximum data rate;
in case that it is determined that the data rate associated with the network slice exceeds the maximum data rate, reducing the AMBR of the non-GBR QoS flows not to exceed the maximum data rate; and
transmitting, to a session management function (SMF), a notification message for the network slice including the reduced AMBR.
2 . The method of claim 1 , wherein the
notification message for the network slice further includes the data rate associated with the network slice.
3 . The method of claim 1 , further comprising:
rejecting a request of a new protocol data unit (PDU) session establishment, in case that it is determined that the data rate associated with the network slice exceeds the maximum data rate.
4 . The method of claim 1 , wherein the data rate associated with the network slice is a sum of data rates of all protocol data unit (PDU) sessions associated with the network slice.
5 . The method of claim 1 , wherein the notification message for the network slice further includes the S-NSSAI of the network slice and one of an indication associated with a rejection of an establishment of a PDU session associated with the network slice or an indication associated with a rejection of a registration of a user equipment which requested the network slice.
6 . An apparatus of a policy control function (PCF) in a wireless communication system, the apparatus of the PCF comprising:
a transceiver; and
at least one processor configured to:
obtain network slice related policy information including a maximum data rate for a network slice of a single-network slice selection assistance information (S-NSSAI) wherein the maximum data rate includes a maximum bit rate (MBR) of guaranteed bitrate (GBR) Quality of Service (QOS) flows and an aggregate maximum bit rate (AMBR) of non-guaranteed bitrate (non-GBR) QoS flows,
monitor a data rate associated with the network slice,
determine whether the data rate associated with the network slice exceeds the maximum data rate,
in case that it is determined that the data rate associated with the network slice exceeds the maximum data rate, reduce the AMBR of the non-GBR QoS flows not to exceed the maximum data rate, and
transmit, to a session management function (SMF), a notification message for the network slice including the reduced AMBR.
7 . The apparatus of the PCF of claim 6 , wherein
the notification message for the network slice further includes the data rate associated with the network slice.
8 . The apparatus of the PCF of claim 6 , wherein the at least one processor is further configured to:
reject a request of a new protocol data unit (PDU) session establishment, in case that it is determined that the data rate associated with the network slice exceeds the maximum data rate.
9 . The apparatus of the PCF of claim 6 , wherein the data rate associated with the network slice is a sum of data rates of all protocol data unit (PDU) sessions associated with the network slice.
10 . The apparatus of the PCF of claim 6 , wherein the notification message for the network slice further includes the S-NSSAI of the network slice and one of or an indication associated with a rejection of an establishment of a PDU session associated with the network slice or an indication associated with a rejection of a registration of a user equipment which requested the network slice.