Granted Patent B2

US 12,556,477 · App. 18/208,436 · Granted Feb 17, 2026

Inventors: Hyun Kyung Yoo (Daejeon, KR); Namseok Ko (Daejeon, KR); Sung Hyuk Byun (Daejeon, KR)

Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

H04L45/74

Abstract

Claims (33)

1 . A method by which a first service programmable network (SPN) node operates in a communication system, the method comprising:

receiving a first packet from a zeroth SPN node;

identifying a segment routing header (SRH) of the first packet, the SRH including a segment list;

identifying a selective binding segment based on the segment list;

requesting a processing result from a network service function (NSF) corresponding to the segment list when the segment list involves the selective binding segment;

receiving a color value according to the processing result from the NSF;

dynamically selecting a segment list according to the color value; and

transmitting a second packet, to which a new SRH including the selected segment list and a new header are added, to a second SPN node.

2 . The method of claim 1 , wherein a segment list for one of a plurality of candidate paths is determined according to the color value.

3 . The method of claim 1 , wherein the transmitting of the second packet, to which the new SRH including the selected segment list and the new header are added, to the second SPN node includes determining a new SRH according to the color value.

4 . The method of claim 1 , wherein the first packet includes policy information about segment routing, and the policy information includes information about a selection mode.

5 . The method of claim 4 , wherein the segment list is determined according to the information about the selection mode.

6 . The method of claim 1 , further comprising transmitting a segment identifier (SID) corresponding to the NSF to a network in advance.

7 . The method of claim 1 , wherein the transmitting of the second packet, to which the new SRH including the selected segment list and the new header are added, to the second SPN node includes updating the color value into a context type length value (TLV), wherein the context TLV is included in the new SRH.

8 . The method of claim 1 , wherein the identifying of the selective binding segment based on the segment list includes transmitting the packet to the first SPN according to a defined segment operation when the segment list does not involve the selective binding segment.

9 . An apparatus, which is a first service programmable network (SPN) node in a communication system, the apparatus comprising:

an SPN application; and

an SPN controller operatively connected to the SPN application;

wherein the SPN controller is configured to:

receive a first packet from a zeroth SPN;

identify a segment routing header (SRH) of the first packet, the SRH including a segment list;

identify a selective binding segment based on the segment list;

request a processing result from a network service function (NSF) corresponding to the segment list when the segment list involves the selective binding segment;

receive a color value according to the processing result from the NSF;

dynamically select a segment list according to the color value; and

transmit a second packet, to which a new SRH including the selected segment list and a new header are added, to a second SPN node.

10 . The apparatus of claim 9 , wherein a segment list for one of a plurality of candidate paths is determined according to the color value.

11 . The apparatus of claim 9 , wherein, to transmit the second packet, to which the new SRH including the selected segment list and the new header are added, to the second SPN node, the SPN controller determines a new SRH according to the color value.

12 . The apparatus of claim 9 , wherein the first packet includes policy information about segment routing, and the policy information includes information about a selection mode.

13 . The apparatus of claim 12 , wherein the segment list is determined according to the information about the selection mode.

14 . The apparatus of claim 9 , wherein the SPN controller transmits a segment identifier (SID) corresponding to the NSF to a network in advance.

15 . The apparatus of claim 9 , wherein, to transmit the second packet, to which the new SRH including the selected segment list and the new header are added, to the second SPN node, the SPN controller updates the color value into a context type length value (TLV), and the context TLV is included in the new SRH.

16 . The apparatus of claim 9 , wherein, in order to identify the selective binding segment based on the segment list, the SPN controller transmits the packet to the first SPN according to a defined segment operation when the segment list does not involve the selective binding segment.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (25)