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EP-4740607-A1 - METHOD AND SYSTEM FOR TRAFFIC MIGRATION FROM DR SITE TO PR SITE IN S-CSCF

EP4740607A1EP 4740607 A1EP4740607 A1EP 4740607A1EP-4740607-A1

Abstract

The present disclosure relates to a method and a system for traffic migration from a DR site to PR site in an S-CSCF in a 4G/5G network, the method comprising receiving, at I-CSCF unit [312], a signal to initiate migration; sending, from I-CSCF unit [312], a UAR [316] to an HSS [324] to obtain a server name; obtaining, at I-CSCF unit [312], the server name from the HSS [324] through a UAA [318]; the I-CSCF unit [312], whether a forceful selection mode is ON, and if the obtained server name corresponds to DR site; based on determining that the obtained server name of the DR site and forceful selection is an ON state, initiating, from I-CSCF unit [312], protocol for traffic migration to PR site; and sending, at I-CSCF unit [312], UAR [316] with capabilities option to HSS [324] to facilitate selection of PR site S-CSCF.

Inventors

  • BISHT, BIRENDRA
  • BHATNAGAR, AAYUSH
  • Singh, Harbinder Pal
  • KUMAR, ABHAY
  • Kelkar, Priti
  • REDDY, P R Srikanth
  • RANJAN, Surabhi
  • KUMAR, VIVEK

Assignees

  • Jio Platforms Limited

Dates

Publication Date
20260513
Application Date
20240611

Claims (19)

  1. 1. A method [400] for traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF) in a 4G/5G network, the method comprising: receiving [404], by a transceiver unit [302], at an interrogating call session control function (I-CSCF) unit [312], a signal to initiate migration; sending [406], by the transceiver unit [302], from the I-CSCF unit [312], a user authentication request (UAR) [316] to a home subscriber server (HSS) [324] to obtain a server name; obtaining [408], by a fetching unit [304], at the I-CSCF unit [312], the server name from the HSS [324] through a User Authorization Answer (UAA) [318]; verifying [410], by a verification unit [306], at the I-CSCF unit [312], whether a forceful selection mode is ON, and if the obtained server name corresponds to a DR site; based on determining that the obtained server name is of the DR site and forceful selection is in an ON state, initiating [412], by an initiating unit [308], from the I-CSCF unit [312], a protocol for traffic migration to the PR site; and sending [414], by the transceiver unit [302], at the I-CSCF unit [312], the UAR [316] with capabilities option to the HSS [324] to facilitate selection of the PR site S-CSCF.
  2. 2. The method [400] as claimed in claim 1, wherein the traffic migration is supported by a System Integration Bus (SIB) node [320],
  3. 3. The method [400] as claimed in claim 1, wherein the server name is Disaster Recovery Serving Call Session Control Function (DR S-CSCF) unit [314],
  4. 4. The method [400] as claimed in claim 1, wherein the UAR [316] with capabilities option is sent to the HSS [324] to facilitate high priority-based selection of the PR site S-CSCF.
  5. 5. The method [400] as claimed in claim 3, further comprising: receiving, via the transceiver unit [302], by the DR S-CSCF unit [314], a REGISTER request from the I-CSCF unit [312]; clearing, via a clarification unit [310], by the DR S-CSCF unit [314], a subscriber data in response to the REGISTER request; and responding, via the transceiver unit [302], by the DR S-CSCF unit [314], with a 480 signal to the I-CSCF unit [312],
  6. 6. The method [400] as claimed in claim 5, wherein the I-CSCF unit [312], upon receiving the 480 signal, triggers an S-CSCF restoration.
  7. 7. The method [400] as claimed in claim 2, wherein the SIB node [320] supports two options for S-CSCF re-selection, comprising ALWAYS option and S-CSCF-INITIATED option.
  8. 8. The method [400] as claimed in claim 7, wherein in the ALWAYS option, the I-CSCF unit [312] queries the HSS [324 through the UAR [316] and receive UAA [318] to obtain the server name corresponding to the DR S-CSCF unit [314], and in response to the forceful selection being ON and the server name being from the DR site, sends the UAR [316] with the capabilities option.
  9. 9. The method [400] as claimed in claim 1, wherein the capabilities option comprises at least one of a support for high-definition voice service, a video call functionality, and an enhanced data security feature for determining whether the S-CSCF supports at least one service from an emergency call, session timer, or a media type.
  10. 10. A system [300] for traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF) in a 4G/5G network, the system comprising: a transceiver unit [302] configured to: receive, at an interrogating call session control function (I-CSCF) unit [312], a signal to initiate migration; and send from the I CSCF unit [312], a user authentication request (UAR) [316] to a home subscriber server (HSS) [324] to obtain a server name; a fetching unit [304] connected to at least the transceiver unit [302], wherein the fetching unit [304] is configured to obtain, at the I-CSCF unit [312], the server name from the HSS [324] through a User Authorization Answer (UAA) [318]; a verification unit [306] connected to at least the fetching unit [304], wherein the verification unit [306] is configured to verify at the I-CSCF unit [312], whether a forceful selection mode is ON, and if the obtained server name corresponds to a DR site; based on determining that the obtained server name is of the DR site and forceful selection is in an ON state, an initiating unit [308] is connected to at least the verification unit [306], wherein the initiating unit [308] is configured to initiate, from the I-CSCF unit [312], a protocol for traffic migration; and the transceiver unit [302] is configured to send, at the I-CSCF, the UAR [316] with capabilities option to the HSS [324] to facilitate selection of the PR site S-CSCF.
  11. 11. The system [300] as claimed in claim 10, wherein the traffic migration is supported by a System Integration Bus (SIB) node [320],
  12. 12. The system [300] as claimed in claim 10, wherein the server name is Disaster Recovery Serving Call Session Control Function (DR S-CSCF) unit [314],
  13. 13. The system [300] as claimed in claim 10, wherein the UAR [316] with capabilities option is sent to the HSS [324] to facilitate high priority-based selection of the PR site S-CSCF.
  14. 14. The system [300] as claimed in claim 12, wherein the DR S-CSCF unit [314] is configured to: receive, via the transceiver unit [302], a register request from the I-CSCF unit [312]; clear, via a clarification unit [310], a subscriber data in response to the register request; and respond, the transceiver unit [302], with a 480 signal to the I-CSCF unit [312],
  15. 15. The system [300] as claimed in claim 14, wherein the I-CSCF unit [312], upon receiving the 480 signal, triggers an S-CSCF restoration.
  16. 16. The system [300] as claimed in claim 11, wherein the SIB node [320] supports two options for S-CSCF re-selection, comprising ALWAYS option and S-CSCF-INITIATED option.
  17. 17. The system [300] as claimed in claim 16, wherein in the ALWAYS option, the I-CSCF unit [312] queries the HSS [324] through the UAR [316] and receive UAA [318] to obtain the server name corresponding to the DR S-CSCF [314], and in response to the forceful selection being ON and the server name being from the DR site, sends the UAR [316] with the capabilities option.
  18. 18. The system [300] as claimed in claim 10, wherein the capabilities option comprises at least one of a support for high-definition voice service, a video call functionality, and an enhanced data security feature for determining whether the S-CSCF supports at least one service from an emergency call, session timer, or a media type.
  19. 19. A non-transitory computer-readable storage medium storing instructions for traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF) in a 4G/5G network, the storage medium comprising executable code which, when executed by one or more units of a system, causes: a transceiver unit [302] to receive, at an interrogating call session control function (I- CSCF) unit [312], a signal to initiate migration; the transceiver unit [302] to send, from the I-CSCF unit [312], a user authentication request (UAR) [316] to a home subscriber server (HSS) [324] to obtain a server name; a fetching unit [304] to obtain, at the I-CSCF unit [312], the server name from the HSS [324] through a User Authorization Answer (UAA) [318]; a verification unit [306] to verify, at the I-CSCF unit [312], whether a forceful selection mode is ON, and if the obtained server name corresponds to a DR site; based on determining that the obtained server name is of the DR site and forceful selection is in an ON state, an initiating unit [308] to initiate, from the I-CSCF unit [312], a protocol for traffic migration to the PR site; and the transceiver unit [302] to send, at the I-CSCF unit [312], the UAR [316] with capabilities option to the HSS [324] to facilitate selection of the PR site S-CSCF.

Description

METHOD AND SYSTEM FOR TRAFFIC MIGRATION FROM DR SITE TO PR SITE IN S-CSCF FIELD OF DISCLOSURE [0001] Embodiments of the present disclosure generally relate to network performance management systems. More particularly, embodiments of the present disclosure relate to system and method for traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF). BACKGROUND [0002] Wireless communication technology has rapidly evolved over the past few decades, with each generation bringing significant improvements and advancements. The first generation of wireless communication technology was based on analog technology and offered only voice services. However, with the advent of the second-generation (2G) technology, digital communication and data services became possible, and text messaging was introduced. The third- generation (3G) technology marked the introduction of high-speed internet access, mobile video calling, and location-based services. The fourth-generation (4G) technology revolutionized wireless communication with faster data speeds, better network coverage, and improved security. Currently, the fifth-generation (5G) technology is being deployed, promising even faster data speeds, low latency, and the ability to connect multiple devices simultaneously. With each generation, wireless communication technology has become more advanced, sophisticated, and capable of delivering more services to its users. [0003] The migration from Disaster Recovery (DR) site to Primary Recovery (PR) site in the Serving Call/Session Control Function (S-CSCF) in a 4G/5G network have certain drawbacks in the existing solutions. [0004] In the current existing solutions, the migration process from DR to PR can be complex and time-consuming. It requires careful planning, coordination, and testing to ensure a smooth transition. The configuration changes, protocol adaptations, and interoperability testing involved can increase the complexity of the migration. Further, the migration process requires network resources as devices will be forcefully de-registered. This can result in increased resource utilization. Also, during the migration process, there is a possibility of service disruptions or downtime. It is crucial to carefully plan and execute the migration to minimize any negative impact on ongoing services and end-user experience. While migrating from DR to PR in the S-CSCF can offer benefits like improved scalability, simplified network architecture, and reduced signaling load, it is crucial to carefully assess and mitigate the potential disadvantages to ensure a successful migration. Further, over the period of time various solutions have been developed to improve the performance of communication devices and for seamless traffic migration from DR to PR in SIB node. However, there are certain challenges with existing solutions. [0005] Thus, there exists an imperative need in the art to provide system and method for seamless traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF). SUMMARY [0006] This section is provided to introduce certain aspects of the present disclosure in a simplified form that are further described below in the detailed description. This summary is not intended to identify the key features or the scope of the claimed subject matter. [0007] An aspect of the present disclosure may relate to a method for traffic migration from a disaster recovery (DR) site to a primary recovery (PR) site in a Serving Call Session Control Function (S-CSCF) in a 4G/5G network, the method comprising receiving, by a transceiver unit, at an interrogating call session control function (I-CSCF) unit, a signal to initiate migration. The method further comprises sending, by the transceiver unit, from the I-CSCF unit, a user authentication request (UAR) to a home subscriber server (HSS) to obtain a server name. The method further comprises obtaining, by a fetching unit, at the I-CSCF unit, the server name from the HSS through a User Authorization Answer (UAA). The method further comprises verifying, by a verification unit, at the I-CSCF unit, whether a forceful selection mode is ON, and if the obtained server name corresponds to a DR site. The method further comprises initiating, by an initial unit, from the I-CSCF unit, a protocol for traffic migration to the PR site based on determining that the obtained server name is of the DR site and forceful selection is in an ON state. Thereafter, the method further comprises sending, by the transceiver unit, at the I-CSCF unit, the UAR with capabilities option to the HSS to facilitate selection of the PR site S-CSCF. [0008] In an exemplary aspect of the present disclosure, the traffic migration is supported by a System Integration Bus (SIB) node. [0009] In an exemplary aspect of the present disclosure, the server name is Disaster Recovery S