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EP-4740593-A1 - METHOD IMPLEMENTED BY A NETWORK NODE FOR HANDLING HANDOVER IN A COMMUNICATION NETWORK

EP4740593A1EP 4740593 A1EP4740593 A1EP 4740593A1EP-4740593-A1

Abstract

The present disclosure relates to a method [200] and a system [100] implemented by a network node [101] for handling handover in a communication network The disclosure encompasses: verifying, by the network node [101] via a processor [104], a reception of a mobility registration request from a user equipment (UE) after a successful handover of the UE from a first network system to a second network system; initiating, by the network node [101] via the processor [104], a timer to wait for the reception of the mobility registration request for a predetermined time period; and removing, by the network node [101] via the processor [104], a context of the UE from the second network system in an event the reception of the mobility registration request fails in the predetermined time period.

Inventors

  • SINGH, MUKESH
  • Bisht, Birendra Singh
  • KUMAR, AMIT
  • Bhatt, Naresh
  • Vedma, Jayakrishna
  • LUTHRA, GAURAV
  • SINGH, SUMIT
  • GUPTA, ANSHUL
  • KUMAR, RAHUL
  • JAISWAL, Rakesh Kumar
  • BHATNAGAR, AAYUSH
  • NATALI, Fenil
  • MUKHERJEE, KOUSHIK
  • EDAKKARA, Jim
  • Ghag, Arpita Jaywant
  • BHATTACHARYA, Dipanjan
  • KUMAR, SANDEEP
  • Singh, Harbinder Pal

Assignees

  • Jio Platforms Limited

Dates

Publication Date
20260513
Application Date
20240612

Claims (14)

  1. 1. A method [200] implemented by a network node [101] for handling handover in a communication network, the method [200] comprising: verifying, by the network node [101] via a processor [104], a reception of a mobility registration request from a user equipment (UE) after a successful handover of the UE from a first network system to a second network system; initiating, by the network node [101] via the processor [104], a timer to wait for the reception of the mobility registration request for a predetermined time period; and removing, by the network node [101] via the processor [104], a context of the UE from the second network system in an event the reception of the mobility registration request fails in the predetermined time period.
  2. 2. The method [200] as claimed in claim 1 , wherein the first network system is an Evolved Packet System (EPS) and the second network system is a 5 th Generation System (5GS).
  3. 3. The method [200] as claimed in claim 1, wherein the network node [101] is an Access and Mobility Management Function (AMF).
  4. 4. The method [200] as claimed in claim 1, wherein the method [200] further comprises registering, by the network node [101], the UE in the second network system by: stopping, by the network node [101], the timer in an event the mobility registration request is received in the predetermined time period, and registering, via the network node [101], the UE in the second network system and assign a Globally Unique Temporary Identifier (GUTI) to the UE.
  5. 5. The method [200] as claimed in claim 1, wherein the context of the UE is removed from the second network system to avoid stale sessions, and wherein the context of the UE is removed in the event the reception of the mobility registration request fails in the predetermined time period.
  6. 6. The method [200] as claimed in claim 1, wherein the context corresponds to at least one from among user's identity, a set of service subscriptions, a set of network settings, a user existing session data, and a set of operational parameters necessary for the UE's connectivity and a communication within at least one of the first network system and the second network system.
  7. 7. A system [100] implemented by a network node [101] for handling handover in a communication network, the system [100] comprises: a storage unit [102]; and a processor [104], coupled to the storage unit [102], the processor [104] causes the network node [101] to: verify, a reception of a mobility registration request from a user equipment (UE) after a successful handover of the UE from a first network system to a second network system; initiate, a timer to wait for the reception of the mobility registration request for a predetermined time period; and remove, a context of the UE from the second network system in an event the reception of the mobility registration request fails in the predetermined time period.
  8. 8. The system [100] as claimed in claim 7, wherein the first network system is an Evolved Packet System (EPS) and the second network system is a 5 th Generation System (5GS).
  9. 9. The system [100] as claimed in claim 7, wherein the network node [101] is an Access and Mobility Management Function (AMF).
  10. 10. The system [100] as claimed in claim 7, wherein the processor [104] further causes the network node [101] to register, the UE in the second network system to: o stop, the timer in an event the mobility registration request is received in the predetermined time period, and o register, the UE in the second network system and assign a Globally Unique Temporary Identifier (GUTI) to the UE.
  11. 11. The system [100] as claimed in claim 7, wherein the context of the UE is removed from the second network system to avoid stale sessions, an wherein the context of the UE is removed in the event the reception of the mobility registration request fails in the predetermined time period.
  12. 12. The system [100] as claimed in claim 7, wherein the context corresponds to at least one from among user's identity, a set of service subscriptions, a set of network settings, a user existing session data, and a set of operational parameters necessary for the UE's connectivity and a communication within at least one of the first network system and the second network system.
  13. 13. A user equipment (UE) connected to a network node [101], for handling handover in a communication network, the UE being configured to: send, a mobility registration request to the network node [101], after a successful handover of the UE from a first network system to a second network system, for verification by the network node [101]; wait, for the reception of the mobility registration request for a predetermined time period, after an initialization of a timer by the network node [101]; and exit, the second network system, upon removal of a context of the UE from the second network system in an event the reception of the mobility registration request fails in the predetermined period.
  14. 14. A non-transitory computer readable storage media for handling handover in a communication network, the storage medium comprising executable code which, when executed by one or more units of a system [100] implemented by a network node [101], causes a processor [104] of the system [100] to: verify, a reception of a mobility registration request from a user equipment (UE) after a successful handover of the UE from a first network system to a second network system; initiate, a timer to wait for the reception of the mobility registration request for a predetermined time period; and remove, a context of the UE from the second network system in an event the reception of the mobility registration request fails in the predetermined time period.

Description

METHOD IMPLEMENTED BY A NETWORK NODE FOR HANDLING HANDOVER IN A COMMUNICATION NETWORK FIELD OF THE DISCLOSURE [0001] The present disclosure relates generally to the field of wireless communication systems. More particularly, the present disclosure relates to method implemented by a network node for handling handover associated with a user equipment (UE) in a wireless communication network. BACKGROUND [0002] The following description of related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain implementations of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section be used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of prior art. [0003] 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. [0004] During establishment of a connection of a user equipment (UE) with a communication network, a User Context is required that is stored at a network node, more particularly at an Access and Mobility Management Function (AMF) of the communication network, the user context contains information about the UE. When a user accessing a second network system such as a 5G system (5GS) (including but not limited to), and the user has to call another user, a handover of the connection takes place from a second network system i.e., the 5G system (5GS) to a first network system such as an Evolved Packet System (EPS) (including but not limited to) to handle the call. After the call, when the user has to switch back from the first network system to the second network system, a handover of the connection is done from the first network system to the second network system in order to allow the user to have the required bandwidth. In certain cases, the handover the first network system to the second network system is successful, but a Mobility Registration Request is not received at network node from the UE. This leads to non-assignment of an identifier such as, including but not limited to, 5G - Global Unique Temporary Identifier (GUTI), of the UE and thereby, the UE does not get registered in the second network system. The GUTI here refers to a temporary identifier used in 5G networks to identify a user equipment such as but not limited to a mobile device and its associated subscription information. In the existing solutions, this results in a stale session at the network node, a wastage of network resources and an inefficient network restoration and reducing performance of the network node. This scenario is handled at network node by deleting the user context of such users gracefully after running a small timer. [0005] Further, over the period of time various solutions have been developed to improve the performance of communication devices and to handle a handover of the connection from the first network system to the second network system. However, the conventionally available systems fail to handle the handover efficiently and reliably. [0006] Thus, there exists an imperative need in the art of a method implemented by the network node to handle the handover of the UE from the first network system to the second network system in an efficient and a reliable manner, which the present disclosure aims to address. OBJECTS OF THE DISCLOSURE [0007] Some of the objects of the present disclosure, which at least one embodiment disclosed herein satisfies are listed herein below. [0008] It is an object of the present disclosure to provide a method and a system for handling handover in a communication network. [0009] It is another object of the present disclosure to provide a solution implemented by the network node to handle a handover of the UE from a first network system to a second network system. [0010] It is another object of the present disclosure to provide a solution that removes a context of the UE from the second network system to avoid s