Apparatus and method for E2 node control and cell control in wireless communication system
A method performed by a Distributed Unit (DU) (e.g., included in a 5G or 6G communication system) may include receiving a control message from a Radio Access Network (RAN) Intelligent Controller (RIC), wherein the control message includes control information for controlling Data Radio Bearer (DRB) allocation in each network slice, identifying, from a request message for setting one or more DRBs of a terminal, Single Network Slice Selection Assistance Information (S-NSSAI) of the one or more DRBs, and setting the number of DRBs allocatable in a network slice corresponding to the S-NSSAI, based on the control information.
1 . A method performed by a distributed unit (DU), comprising:
receiving, from a radio access network (RAN) intelligent controller (RIC), a control message including control information for controlling data radio bearer (DRB) allocation in each network slice;
identifying, from a request message for setting one or more DRBs of a terminal, single network slice selection assistance Information information (S-NSSAI) of the one or more DRBs; and
setting a number of DRBs allocatable in a network slice corresponding to the S-NSSAI, based on the control information,
wherein the control information includes weight information including a weight value applied to a threshold for the number of DRBs allocatable in the network slice of the DU.
2 . The method of claim 1 ,
wherein the control information further includes timer information, and
wherein the timer information includes information on a time duration to which the weight value is applied.
3 . The method of claim 1 , further comprising:
determining whether to accept or reject a request for the setting of the one or more DRBs, based on the set number of DRBs;
in case that the request is accepted, transmitting an accept message to the terminal; and
in case that the request is rejected, transmitting a reject message to the terminal.
4 . The method of claim 1 , further comprising transmitting to the RIC an E2 report including a cell list of the DU, a slice list, and information on an allocation portion of each network slice.
5 . A method performed by an RIC, comprising:
generating a control message including control information for controlling DRB allocation for each network slice; and
transmitting the control message to a DU,
wherein the control information is used to adjust a number of DRBs allocatable in a network slice of the DU, and
wherein the control information includes weight information including a weight value applied to a threshold for the number of DRBs allocatable in the network slice of the DU.
6 . The method of claim 5 ,
wherein the control information further includes timer information, and
wherein the timer information includes information on a time duration to which the weight value is applied.
7 . The method of claim 5 , further comprising receiving from the DU an E2 report including a cell list of the DU, a slice list, and information on an allocation portion of each network slice.
8 . A distributed unit (DU), comprising:
a transceiver;
a processor; and
memory storing instructions that, when executed by the processor, cause the DU to:
receive a control message from an RIC, wherein the control message includes control information for controlling DRB allocation in each network slice;
identify, from a request message for setting one or more DRBs of a terminal, S-NSSAI of the one or more DRBs; and
set a number of DRBs allocatable in a network slice corresponding to the S-NSSAI, based on the control information,
wherein the control information includes weight information including a weight value applied to a threshold for the number of DRBs allocatable in the network slice of the DU.
9 . The DU of claim 8 ,
wherein the control information further includes timer information, and
wherein the timer information includes information on a time duration to which the weight value is applied.
10 . The DU of claim 8 , wherein the memory further comprises the instructions that, when executed by the processor, cause the DU to:
determine whether to accept or reject a request for the setting of the one or more DRBs, based on the set number of DRBs;
transmit an accept message to the terminal when the request is accepted; and
transmit a reject message to the terminal when the request is rejected.
11 . The DU of claim 8 , wherein the memory further comprises the instructions that, when executed by the processor, cause the DU to transmit to the RIC an E2 report including a cell list of the DU, a slice list, and information on an allocation portion of each network slice.
12 . A radio access network (RAN) intelligent controller (RIC), comprising:
a transceiver;
a processor; and
memory storing instructions that, when executed by the processor, cause the RIC to:
generate a control message including control information for controlling DRB allocation for each network slice; and
transmit the control message to a DU,
wherein the control information is used to adjust a number of DRBs allocatable in a network slice of the DU, and
wherein the control information includes weight information including a weight value applied to a threshold for the number of DRBs allocatable in the network slice of the DU.
13 . The RIC of claim 12 ,
wherein the control information further includes timer information, and
wherein the timer information includes information on a time duration to which the weight value is applied.
14 . The RIC of claim 12 , wherein the memory further comprises the instructions that, when executed by the processor, cause the RIC to receive from the DU an E2 report including a cell list of the DU, a slice list, and information on an allocation portion of each network slice.