EP-4740590-A1 - METHOD AND SYSTEM FOR PERFORMING HANDOVER IN A WIRELESS COMMUNICATION NETWORK

EP4740590A1EP 4740590 A1EP4740590 A1EP 4740590A1EP-4740590-A1

Abstract

The present disclosure relates to a method and a system for performing handover in a wireless communication network The disclosure encompasses identifying a first interface [305f] between a source base station [304s] and a target base station [304t]; transmitting a handover request for a user equipment (UE) based on a measurement report; receiving a handover response based on the handover request; detecting a failure of the handover; and performing the handover.

Inventors

SHAH, BRIJESH
BHATNAGAR, PRADEEP KUMAR
BHATNAGAR, AAYUSH
Bajpai, Sourabh
BUCH, YASHESH KAMLESH
TARAN, MAYANK
CHOURASIA, NITESH KUMAR
GUPTA, KAPIL

Assignees

Jio Platforms Limited

Dates

Publication Date: 20260513
Application Date: 20240625

Claims (12)

1. A method [400] for performing handover in a wireless communication network, the method [400] comprising: identifying, by an identification unit [302], a first interface [305f] between a source base station [304s] and a target base station [304t]; transmitting, by a transceiver unit [306], a handover request for a user equipment (UE) [303] from the source base station [304s] to the target base station [304t] based on a measurement report received at the source base station [304s] from the UE [303]; receiving, via the transceiver unit [306] at the source base station [304s], a handover response from the target base station [304t] based on the handover request for the UE [303]; detecting, by a handover manager unit [307], a failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t], via the first interface [305f based on the handover response; and performing, by the handover manager unit [307], the handover of the UE [303] between the source base station [304s] and the target base station [304t] via a second interface [305 s] based at least on the detection of failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f],
2. The method [400] as claimed in claim 1, wherein the source base station [304s] is a source next-generation Node Base station (source gNB) from which the handover of the UE [303] is to be done and the target base station [304t] is a target next-generation Node Base station (target gNB) to which the handover of the UE [303] is to be done.
3. The method [400] as claimed in claim 1, wherein at least one of: the first interface [305f] is an Xn interface, and the second interface [305s] is a Ng interface.
4. The method [400] as claimed in claim 1, the method [400] further comprises: detecting, by the handover manager unit [307], a failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] and the second interface [305s], blacklisting, by the handover manager unit [307], the target base station [304t] for a pre-defined time period based on the detection of the failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] and the second interface [305s], and stopping, by the handover manager unit [307], the handover of the UE [303] and one or more other UEs [303] to the target base station [304t] for the pre-defined time period based on the blacklisting.
5. The method [400] as claimed in claim 1 wherein the performing, by the handover manager unit [307], the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the second interface [305s], is further based on the detection of the failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] for more than a predefined number of times.
6. A system [300] for performing handover in a wireless communication network, the system [300] comprising: an identification unit [302], configured to: o identify, a first interface [305f] between a source base station [304s] and a target base station [304t]; a transceiver unit [306] connected at least to the identification unit [302], the transceiver unit [306] configured to: o transmit, a handover request for a user equipment (UE) [303] from the source base station [304s] to the target base station [304t] based on a measurement report received at the source base station [304s] from the UE [303], and o receive, at the source base station [304s], a handover response from the target base station [304t] based on the handover request for the UE [303]; and a handover manager unit [307] connected at least to the transceiver unit [306] and the identification unit [302], the handover manager unit [307] configured to: o detect a failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t], via the first interface [305f based on the handover response, and o perform the handover of the UE [303] between the source base station [304s] and the target base station [304t] via a second interface [305s] based at least on the detection of failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] .
7. The system [300] as claimed in claim 6, wherein the source base station [304s] is a source next-generation Node B (source gNB) from which the handover of the UE [303] is to be done and the target base station [304t] is a target next-generation Node B (target gNB) to which the handover of the UE [303] is to be done.
8. The system [300] as claimed in claim 6, wherein the first interface [305f] is an Xn interface, and the second interface [305s] is a Ng interface.
9. The system [300] as claimed in claim 6, wherein the handover manager unit [307] is further configured to: detect, a failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t], via the first interface [305f] and the second interface [305s], blacklist, the target base station [304t] for a pre-defined time period based on the detection of the failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t], via the first interface [305f] and the second interface [305s], and stop, the handover of the UE [303] and one or more other UEs [303] to the target base station [304t] for the pre-defined time period based on the blacklisting.
10. The system [300] as claimed in claim 6 wherein the handover manager unit [307] is configured to perform the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the second interface [305s], is further based on the detection of the failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] for more than a predefined number of times.
11. A User Equipment (UE) [303] in a wireless communication network, the UE [303] comprising: a transceiver unit [306], wherein the transceiver unit [306] is configured to: o send a request to a system [300] for performing handover from a source base station [304s] to a target base station [304t], and o transmit a measurement report to the source base station [304s], wherein the UE [303] is handed off to the target base station [304t] based on a handover response received from the system [300], wherein the handoff between the source base station [304s] and the target base station [304t] happens via at least one of an Xn interface and a Ng interface.
12. A non-transitory computer-readable storage medium storing instruction for performing handover in a wireless communication network, the storage medium comprising executable code which, when executed by one or more units of a system [300], causes: an identification unit [302] to: o identify, a first interface [305f] between a source base station [304s] and a target base station [304t]; a transceiver unit [306] connected at least to the identification unit [302], to: o transmit, a handover request for a user equipment (UE) [303] from the source base station [304s] to the target base station [304t] based on a measurement report received at the source base station [304s] from the UE [303], and o receive, at the source base station [304s], a handover response from the target base station [304t] based on the handover request for the UE [303]; and a handover manager unit [307] connected at least to the transceiver unit [306] and the identification unit [302], to: o detect a failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t], via the first interface [305f based on the handover response, and o perform the handover of the UE [303] between the source base station [304s] and the target base station [304t] via a second interface [305s] based at least on the detection of failure of the handover of the UE [303] between the source base station [304s] and the target base station [304t] via the first interface [305f] .

Description

METHOD AND SYSTEM FOR PERFORMING HANDOVER IN A WIRELESS COMMUNICATION NETWORK FIELD OF INVENTION [0001] Embodiments of the present disclosure generally relate to wireless communication. More particularly, embodiments of the present disclosure relate to method and system for performing handover in a wireless communication network. BACKGROUND [0002] The following description of the related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain aspects of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section is used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of the 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] In wireless communication, handover occurs when a user equipment (UE) moves from its serving cell to a second cell during an ongoing voice or data transmission. The ongoing voice or data transmission is transferred from the channel of the serving cell to the channel of the second cell. Handover failure is a common problem that can result in degraded network performance and poor user experience. The root cause of handover failure can be complex and multifaceted, involving issues with hardware and software, network configuration, and radio access network (RAN) design. [0005] Further, over the period of time various solutions have been developed to improve the performance of communication devices and to enhance the user experience in 5G network by intelligent handover mechanism. However, there are certain challenges with existing solutions. In the existing solutions, handover is done via Xn or Ng interface explicitly. The Xn or Ng interface are the interfaces between two adjacent gNBs in the 5G communication network. This interface facilitates the transfer of user data and control signalling during handover procedures, thereby allowing seamless mobility of the user devices between different cell sites served by adjacent gNBs. The Xn interface is responsible for enabling coordination and synchronization between gNBs to ensure uninterrupted connectivity and quality of service for mobile users undergoing handover situations. While the Ng interface plays a crucial role in facilitating communication between the radio access network (RAN) and the core network for the establishment, management, and optimization of user sessions in 5G networks. [0006] There may be certain situations in which the Xn or Ng interface is established from the source base station/ source/ gNB (i.e., the gNB from which handover is to be done) but the interface is down from the target base station/ target/ gNB (i.e., the gNB to which handover is to be done). The existing solutions fail to provide quick handover to UE in a scenario where handover is getting stuck or failing due to such reasons, thus resulting in poor user experience. [0007] Therefore, there exists an imperative need in the art to enhance the user experience in 5G by intelligent handover mechanism, which the present disclosure aims to address. SUMMARY OF THE DISCLOSURE [0008] 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. [0009] An aspect of the present disclosure may relate to a method for performing handover in a wireless communication network. The method comprises identifying, by an identification unit, a first interface between a source base station and a target base station. The method further comprises transmitting, by a transceiver unit, a handover request for a user equipment (UE) from the source base station to the target base station based on a measurement report received at the source base station from the UE. The method furthe