[go: up one dir, main page]

WO2025008895A1 - Procédé et système pour effectuer un transfert intercellulaire d'un wlan à une nouvelle radio (nr) dans un réseau sans fil - Google Patents

Procédé et système pour effectuer un transfert intercellulaire d'un wlan à une nouvelle radio (nr) dans un réseau sans fil Download PDF

Info

Publication number
WO2025008895A1
WO2025008895A1 PCT/IN2024/050787 IN2024050787W WO2025008895A1 WO 2025008895 A1 WO2025008895 A1 WO 2025008895A1 IN 2024050787 W IN2024050787 W IN 2024050787W WO 2025008895 A1 WO2025008895 A1 WO 2025008895A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdu
network
network node
existing
pdu session
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IN2024/050787
Other languages
English (en)
Inventor
Mukesh Singh
Aayush Bhatnagar
Fenil NATALI
Koushik Mukherjee
Jim EDAKKARA
Arpita Jaywant Ghag
Dipanjan BHATTACHARYA
Sandeep Kumar
Harbinder Pal Singh
Birendra Singh Bisht
Suman Naskar
Pradeep KHAKHIL
Gunna Srinivas
Sourabh Jain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jio Platforms Ltd
Original Assignee
Jio Platforms Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jio Platforms Ltd filed Critical Jio Platforms Ltd
Publication of WO2025008895A1 publication Critical patent/WO2025008895A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00222—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between different packet switched [PS] network technologies, e.g. transferring data sessions between LTE and WLAN or LTE and 5G
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface

Definitions

  • the present disclosure relates generally to the field of wireless communication systems. More particularly, the present disclosure relates to methods and systems for performing handover from WLAN to New Radio (NR) in a wireless network.
  • NR New Radio
  • 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.
  • 2G second-generation
  • 3G technology marked the introduction of high-speed internet access, mobile video calling, and location-based services.
  • 4G fourth-generation
  • 5G fifth-generation
  • wireless communication technology has become more advanced, sophisticated, and capable of delivering more services to its users.
  • UE User Equipment
  • WLAN Wireless Local Area Network
  • ePDG Wireless Local Area Network
  • NR New Radio
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • Some devices may persistently reattempt the handover, causing unnecessary network traffic and potential battery drain on the UE.
  • IMS internet protocol multimedia subsystem
  • a method implemented by a network node includes receiving, from a user equipment (UE), a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network.
  • the method further includes identifying, by the network node, an existing network node corresponding to the PDU ID tagged in the PDU session establishment request.
  • the method includes initiating, by the network node, a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • the network node is an Access and Mobility Management Function (AMF).
  • AMF Access and Mobility Management Function
  • the existing network node is an existing Session Management Function (SMF) responsible for facilitating the existing PDU session on the first type of network.
  • SMF Session Management Function
  • failure of the identification of the existing network node corresponding to the PDU ID is based on a failure in mapping of the existing SMF for the received PDU ID.
  • the target network node is a new SMF to initiate the new PDU session establishment procedure of the UE with a second type of network.
  • the method further comprises performing, by the network node, a handover of the UE from the first type of network to a second type of network based on an identification of the existing network node corresponding to the tagged PDU ID.
  • the first type of network is a wireless local-area network (WLAN) and the second type of network is a New Radio (NR) Access Network.
  • WLAN wireless local-area network
  • NR New Radio
  • a network node comprising a receiving unit configured to receive, from a user equipment (UE), a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network.
  • the network node further comprises an identifying unit configured to identify an existing network node corresponding to the PDU ID tagged in the PDU session establishment request.
  • the network node further comprises an initiating unit configured to initiate a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • a non-transitory computer-readable storage medium storing instruction for performing handover from WLAN to NR.
  • the instructions include executable code which, when executed by one or more units of a system, may cause a receiving unit to receive, from a user equipment (UE), a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network; an identifying unit to identify an existing network node corresponding to the PDU ID tagged in the PDU session establishment request; and an initiating unit to initiate a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • PDU ID PDU Identifier
  • FIG. 1 illustrates an exemplary block diagram representation of 5th generation core (5GC) network architecture, in accordance with exemplary embodiment of the present disclosure.
  • 5GC 5th generation core
  • FIG. 2 illustrates an exemplary block diagram of a system for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • NR New Radio
  • FIGs. 3A and 3B illustrates an exemplary signal flow diagram illustrating methods and systems for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • NR New Radio
  • FIG. 4 illustrates an exemplary method flow diagram illustrating methods and systems for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • NR New Radio
  • FIG. 5 illustrates an exemplary block diagram of a computing device upon which an embodiment of the present disclosure may be implemented.
  • FIG. 6 illustrates an exemplary sequence diagram for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • NR New Radio
  • exemplary and/or “demonstrative” is used herein to mean serving as an example, instance, or illustration. For the avoidance of doubt, the subject matter disclosed herein is not limited by such examples.
  • any aspect or design described herein as “exemplary” and/or “demonstrative” is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor is it meant to preclude equivalent exemplary structures and techniques known to those of ordinary skill in the art.
  • an “electronic device”, or “portable electronic device”, or “user device” or “communication device” or “user equipment” or “device” refers to any electrical, electronic, electromechanical and computing device.
  • the user device is capable of receiving and/or transmitting one or parameters, performing function/s, communicating with other user devices and transmitting data to the other user devices.
  • the user equipment may have a processor, a display, a memory, a battery and an input-means such as a hard keypad and/or a soft keypad.
  • the user equipment may be capable of operating on any radio access technology including but not limited to IP-enabled communication, Zig Bee, Bluetooth, Bluetooth Low Energy, Near Field Communication, Z-Wave, Wi-Fi, Wi-Fi direct, etc.
  • the user equipment may include, but not limited to, a mobile phone, smartphone, virtual reality (VR) devices, augmented reality (AR) devices, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, mainframe computer, or any other device as may be obvious to a person skilled in the art for implementation of the features of the present disclosure.
  • VR virtual reality
  • AR augmented reality
  • the user device may also comprise a “processor” or “processing unit” includes processing unit, wherein processor refers to any logic circuitry for processing instructions.
  • the processor may be a general-purpose processor, a special purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits, Field Programmable Gate Array circuits, any other type of integrated circuits, etc.
  • the processor may perform signal coding data processing, input/output processing, and/or any other functionality that enables the working of the system according to the present disclosure. More specifically, the processor is a hardware processor.
  • Radio Access Technology refers to the technology used by mobile devices/ user equipment (UE) to connect to a cellular network. It refers to the specific protocol and standards that govern the way devices communicate with base stations, which are responsible for providing the wireless connection. Further, each RAT has its own set of protocols and standards for communication, which define the frequency bands, modulation techniques, and other parameters used for transmitting and receiving data. Examples of RATs include GSM (Global System for Mobile Communications), CDMA (Code Division Multiple Access), UMTS (Universal Mobile Telecommunications System), LTE (Long-Term Evolution), and 5G. The choice of RAT depends on a variety of factors, including the network infrastructure, the available spectrum, and the mobile device's/device's capabilities. Mobile devices often support multiple RATs, allowing them to connect to different types of networks and provide optimal performance based on the available network resources.
  • AMF Access and Mobility Management Function
  • 3GPP 5G Architecture the Access and Mobility Management Function
  • the primary tasks of AMF include but not limited to Registration Management, Connection Management, Reachability Management, Mobility Management and various function relating to security and access management and authorization.
  • SMF Session Management Function
  • IP Address Allocation IP Address Allocation
  • GTP-U general packet radio service tunnelling protocoluser plane
  • Downlink Notification Management a protocol that is used herein.
  • the PDU Session Management includes setup, modification and release of PDU sessions.
  • the Existing telecommunications networks face several challenges when handling handovers, particularly when transitioning between different types of access networks. For example, when a User Equipment (UE) attempts to handover from a Wireless Local Area Network (WLAN) access (ePDG) to a New Radio (NR) Access Network, it sends a Protocol Data Unit (PDU) Session Establishment request to the Access and Mobility Management Function (AMF). This request is meant to indicate that the UE wants to continue using an existing PDU session in the new network environment.
  • WLAN Wireless Local Area Network
  • NR New Radio
  • AMF Access and Mobility Management Function
  • Some devices may persistently reattempt the handover, causing unnecessary network traffic and potential battery drain on the UE.
  • the present disclosure proposes a solution of implementing a method wherein the network node, upon receiving a PDU session establishment request from the UE, identifies an existing network node corresponding to the PDU ID tagged in the request. If the identification fails, the network node initiates a new PDU session establishment procedure via a target network node instead of aborting the handover process.
  • the present disclosure introduces a method wherein the network node, identified as an Access and Mobility Management Function (AMF), performs a handover of the UE from the first type of network (e.g., WLAN) to a second type of network (e.g., NR Access Network) based on the identification of the existing network node corresponding to the tagged PDU ID.
  • AMF Access and Mobility Management Function
  • the present disclosure aims to mitigate the problem of call failures during handover attempts by proposing a network node comprising a receiving unit, an identifying unit, and an initiating unit.
  • the present disclosure provides a solution to the challenge of reattempts and delays in initial PDU Establishment by converting a failed handover attempt into an initial PDU Establishment.
  • FIG. 1 illustrates an exemplary block diagram representation of 5th generation core (5GC) network architecture [100], in accordance with exemplary embodiment of the present disclosure.
  • the 5GC network architecture [100] includes a user equipment (UE) [102], a radio access network (RAN) or gNodeB [104], a plurality if network functions or network entities such as, an access and mobility management function (AMF) [106], a Session Management Function (SMF) unit [108], a Service Communication Proxy (SCP) [110], an Authentication Server Function (AUSF) [112], a Network Slice Specific Authentication and Authorization Function (NSSAAF) [114], a Network Slice Selection Function (NSSF) [116], a Network Exposure Function (NEF) [118], a Network Repository Function (NRF) [120], a Policy Control Function (PCF) [122], a Unified Data Management (UDM) [124], an application function (AF) [126], a User Plane Function (UPF) [
  • AMF access and mobility
  • the User Equipment (UE) [102] interfaces with the network via the Radio Access Network (RAN) [104]; the Access and Mobility Management Function (AMF) [106] manages connectivity and mobility, while the Session Management Function (SMF) unit [108] administers session control; the service communication proxy (SCP) [110] routes and manages communication between network services, enhancing efficiency and security, and the Authentication Server Function (AUSF) [112] handles user authentication; the Non-Standalone Access Architecture Function (NSSAAF) [114] for integrating the 5G core network with existing 4G LTE networks i.e., to enable Non-Standalone (NSA) 5G deployments, the Network Slice Selection Function (NSSF) [116], Network Exposure Function (NEF) [118], and Network Repository Function (NRF) [120] enable network customization, secure interfacing with external applications, and maintain network function registries respectively; the Policy Control Function (PCF) [122] develops operational policies, and the Unified Data Management (UDM) [124]
  • Radio Access Network (RAN) is the part of a mobile telecommunications system that connects user equipment (UE) [102] to the core network (CN) and provides access to different types of networks (e.g., 5G network). It consists of radio base stations and the radio access technologies that enable wireless communication.
  • Access and Mobility Management Function [106] (alternatively referred to as AMF unit [106]) is a 5G core network function responsible for managing access and mobility aspects for both 3GPP and non-3GPP network accesses, including WLAN. It handles procedures such as UE registration, connection establishment, and reachability. Moreover, the AMF supports registration management, access control, and mobility management functions for both 3GPP and non-3GPP access to handle mobility management procedures like handovers and paging.
  • Session Management Function (SMF) [108] is a 5G core network function responsible for managing session-related aspects, such as establishing, modifying, and releasing sessions. It coordinates with the User Plane Function (UPF) for data forwarding and handles IP address allocation and QoS enforcement.
  • UPF User Plane Function
  • Service Communication Proxy (SCP) [110] is a network function in the 5G core network that facilitates communication between other network functions by providing a secure and efficient messaging service. It acts as a mediator for service-based interfaces.
  • AUSF Authentication Server Function
  • NSSAAF Network Slice Specific Authentication and Authorization Function
  • Network Slice Selection Function (NSSF) [116] is a network function responsible for selecting the appropriate network slice for a UE based on factors such as subscription, requested services, and network policies.
  • Network Exposure Function [118] is a network function that exposes capabilities and services of the 5G network to external applications, enabling integration with third-party services and applications.
  • Network Repository Function (NRF) [120] is a network function that acts as a central repository for information about available network functions and services. It facilitates the discovery and dynamic registration of network functions.
  • Policy Control Function (PCF) is a network function responsible for policy control decisions, such as QoS, charging, and access control, based on subscriber information and network policies.
  • Unified Data Management [124] is a network function that centralizes the management of subscriber data, including authentication, authorization, and subscription information.
  • Application Function (AF) is a network function that represents external applications interfacing with the 5G core network to access network capabilities and services.
  • UPF User Plane Function
  • FIG. 2 illustrates an exemplary block diagram of a system [200] for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • the system [200] includes a receiving unit [202], an identifying unit [204], an initiating unit [206], and a processing unit [208], wherein all the components are assumed to be connected to each other in a manner as obvious to the person skilled in the art for implementing features of the present disclosure. Also, in FIG.
  • system [200] may comprise multiple such units or the system [200] may comprise any such numbers of said units, as required to implement the features of the present disclosure.
  • system [200] may be incorporated in the network node (such as AMF [106]).
  • the system [200] comprises the receiving unit [202] configured to receive, from a user equipment (UE) [102], a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network.
  • the receiving unit [202] is designed to handle requests that specifically indicate the continuation of an existing PDU session by including the PDU ID associated with that session.
  • the UE [102] moves from a first type of network, like a Wireless Local Area Network (WLAN), to a second type of network, such as a New Radio (NR) Access Network
  • a first type of network like a Wireless Local Area Network (WLAN)
  • a second type of network such as a New Radio (NR) Access Network
  • the inclusion of the PDU ID in the request helps the network node to identify the specific PDU session that the UE [102] intends to maintain across different network types.
  • the receiving unit [202] facilitates in ensuring seamless connectivity for the UE [102] during network handover.
  • the receiving unit [202] enables the network node to take appropriate actions to continue the existing PDU session or initiate a new session, if necessary, thereby enhancing the overall user experience.
  • the system [200] comprises the identifying unit [204] communicatively coupled to the receiving unit [202] .
  • the identifying unit [204] is configured to identify an existing network node corresponding to the PDU ID tagged in the PDU session establishment request received from the user equipment (UE) [102],
  • the identifying unit [204] compares the PDU ID provided in the request with a database or registry of existing PDU sessions managed by various network nodes. When a match is found, the identifying unit [204] determines the specific network node associated with that PDU session to ensure that the correct network node is identified for the continuation or modification of the PDU session, thereby facilitating seamless connectivity for the UE [102] as it transitions between different types of networks.
  • the network node (such as AMF [106]) can proceed with the appropriate actions to maintain or modify the PDU session as requested by the UE [102], However, if the identification fails, the network node (such as AMF [106]) can take alternative measures, such as initiating a new PDU session establishment procedure via a target network node, to ensure continuity of service for the UE [102], This flexibility in response enhances the network's ability to adapt to various scenarios and maintain a high level of service quality.
  • the system [200] comprises the initiating unit [206] communicatively coupled to the identifying unit [204], The initiating unit [206] is configured to initiate a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • the network node, AMF [106] node initiates a new PDU establishment procedure via a target network node, such as new SMF node [108A] based on a failure of the identification of the existing network node, SMF node [108] corresponding to the PDU ID.
  • the AMF node [106] initiates a new PDU session establishment procedure towards new SMF node [108A] in an event that existing SMF [108] for the tagged PDU ID given in PDU Establishment request from UE [102] is not found.
  • the AMF node [106] continues performing the handover procedure with the obtained SMF [108] in an event that SMF [108] for the tagged PDU ID given in PDU Establishment request from UE [102] is found.
  • the initiating unit [206] operates by triggering the establishment of a new PDU session with the target network node, when the identifying unit [204] fails to match the PDU ID with an existing network node to ensure that the UE [102] can still establish a PDU session and maintain connectivity, even if the existing network node [such as SMF [108] is unavailable or cannot be identified for some reason. Furthermore, the initiating unit [206] facilitates in maintaining the quality of service for the UE [102] during network transitions, such as handovers from a WLAN to an NR Access Network. By initiating a new PDU session establishment procedure, the initiating unit [206] helps to prevent service interruptions and call failures that might occur due to the inability to identify the existing network node.
  • the system [200] comprises the processing unit [208] configured to perform a handover of the UE [102] from the first type of network to a second type of network based on an identification of the existing network node corresponding to the tagged PDU ID.
  • the handover procedure continues with the already identified session management function (SMF).
  • SMF session management function
  • the processing unit is structured to bypass this issue by facilitating the creation of a new PDU session with a new SMF that is suited for the second type of network.
  • FIG. 3 A an exemplary method flow diagram [300] for performing handover from WLAN to New Radio (NR) in a wireless network is shown, in accordance with exemplary embodiments of the present invention is shown.
  • the method [300] is performed by the system [200], As shown in FIG. 3A, the method [300] starts at step [302],
  • the method [300] comprises receiving, at an AMF [106], a PDU Establishment request from the UE [102] with the existing PDU type to transition the IMS PDU to NR.
  • the AMF [106] begins to manage the handover of the PDU session, acknowledging the request from the UE [102] that indicates its desire to continue an established PDU session in a new network environment, specifically transitioning from a WLAN to an NR Access Network.
  • the method [300] comprises checking, by the AMF [106], the SMF [108] where the IMS PDU Session was established through WLAN access.
  • the AMF [106] conducts a search or a query at the network repository function (NRF) to locate the existing SMF [108] that correlates with the PDU ID provided by the UE [102],
  • NRF network repository function
  • the method [300] comprises initiating, by the AMF [106], a new PDU session establishment procedure towards an SMF [108] in the event the SMF [108] for the PDU ID given in the PDU Establishment request from the UE [102] is not found. Instead of terminating the session or leaving the UE [102] without service, the AMF [106] proactively initiates a new PDU session with an alternative SMF [108],
  • the method [300] further includes the step of continuing to perform, by the AMF, the handover procedure with the obtained SMF in the event the SMF [108] for the PDU ID given in the PDU Establishment request from the UE is found. If the existing SMF [108] is successfully identified, the AMF [106] continues with the handover process, ensuring a smooth transition for the UE [102] to the new NR Access Network.
  • FIG. 3B an exemplary flow diagram illustrating method [300] for performing handover from WLAN to New Radio (NR) in a wireless network is shown, in accordance with exemplary embodiments of the present disclosure.
  • the IMS PDUs are established through WLAN access (ePDG).
  • the PDU is associated with a PDU ID
  • the User Equipment (UE) [102] initiates the process by attempting to move the IMS PDU to New Radio (NR) by sending a PDU Establishment Request with an Existing PDU type.
  • the request signifies the UE's [102] intention to maintain the continuity of the ongoing PDU session during the transition from a WLAN network to an NR network, which is part of the 5G system.
  • the AMF [ 106] attempts to locate the SMF [108] where the IMS PDU Session was established through WLAN access.
  • the method [300] includes initiating a new PDU Session Establishment procedure towards the SMF [108],
  • step 330 the SMF [108] is found for the PDU ID.
  • step 332 if the SMF [108] is found for the PDU ID, the AMF [106] continues with the handover procedure with the identified SMF [108], ensuring the UE’s [102] PDU session is maintained without interruption thereby maintaining service continuity and quality, as the established PDU session is seamlessly transitioned to the NR network.
  • FIG. 4 an exemplary method flow diagram [400] illustrating methods and systems for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • the method [400] implemented by the system [200], or the network node (such as the AMF [106]) starts at step [302],
  • the method [400] as disclosed by the present disclosure comprises receiving, from a user equipment (UE) [102], a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network.
  • the receiving unit [202] is designed to handle requests that specifically indicate the continuation of an existing PDU session by including the PDU ID associated with that session.
  • the UE [102] moves from a first type of network, like a Wireless Local Area Network (WLAN), to a second type of network, such as a New Radio (NR) Access Network
  • a first type of network like a Wireless Local Area Network (WLAN)
  • a second type of network such as a New Radio (NR) Access Network
  • the inclusion of the PDU ID in the request helps the network node to identify the specific PDU session that the UE [102] intends to maintain across different network types.
  • the receiving unit [202] facilitates in ensuring seamless connectivity for the UE [102] during network handover.
  • the receiving unit [202] enables the network node to take appropriate actions to continue the existing PDU session or initiate a new session, if necessary, thereby enhancing the overall user experience.
  • the method [400] as disclosed by the present disclosure comprises identifying, by the network node, an existing network node corresponding to the PDU ID tagged in the PDU session establishment request.
  • the network node such as AMF [106] identifies an existing network node, such as, Session Management Function (SMF) [108] corresponding to the PDU ID tagged in the PDU establishment request, where the IMS PDU Session was established through WLAN access.
  • SMF Session Management Function
  • the identifying unit [204] compares the PDU ID provided in the request with a database or registry of existing PDU sessions managed by various network nodes.
  • the identifying unit [204] determines the specific network node associated with that PDU session to ensure that the correct network node is identified for the continuation or modification of the PDU session, thereby facilitating seamless connectivity for the UE [102] as it transitions between different types of networks.
  • the network node (such as AMF [106]) can proceed with the appropriate actions to maintain or modify the PDU session as requested by the UE [102], However, if the identification fails, the network node (such as AMF [106]) can take alternative measures, such as initiating a new PDU session establishment procedure via a target network node, to ensure continuity of service for the UE [102], This flexibility in response enhances the network's ability to adapt to various scenarios and maintain a high level of service quality
  • the method [400] as disclosed by the present disclosure comprises initiating, by the network node, a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • the network node, AMF [106] node initiates a new PDU establishment procedure via a target network node, such as new SMF node [108A] based on a failure of the identification of the existing network node, SMF node [108] corresponding to the PDU ID.
  • the AMF node [106] initiates anew PDU session establishment procedure towards new SMF node [108A] in an event that existing SMF [108] for the tagged PDU ID given in PDU Establishment request from UE [102] is not found.
  • the AMF node [106] continues performing the handover procedure with the obtained SMF [108] in an event that SMF [108] for the tagged PDU ID given in PDU Establishment request from UE [102] is found.
  • the initiating unit [206] operates by triggering the establishment of a new PDU session with the target network node, when the identifying unit [204] fails to match the PDU ID with an existing network node to ensure that the UE [102] can still establish a PDU session and maintain connectivity, even if the existing network node [such as SMF [108] is unavailable or cannot be identified for some reason. Furthermore, the initiating unit [206] facilitates in maintaining the quality of service for the UE [102] during network transitions, such as handovers from a WLAN to an NR Access Network. By initiating a new PDU session establishment procedure, the initiating unit [206] helps to prevent service interruptions and call failures that might occur due to the inability to identify the existing network node.
  • a user with a smartphone that is currently connected to a coffee shop's WLAN network where they have an ongoing Voice over Internet Protocol (VoIP) call running over an IMS PDU session.
  • VoIP Voice over Internet Protocol
  • the smartphone sends a PDU session establishment request to the network node, which in this case is the Access and Mobility Management Function (AMF [106]).
  • AMF [106] Access and Mobility Management Function
  • This request includes the PDU ID that was being used for the VoIP call on the WLAN network.
  • the AMF [106] receives this request and looks for the SMF [108] that was handling the PDU session for the WLAN network.
  • the AMF [106] will initiate a new PDU session establishment procedure.
  • the AMF [106] selects a new SMF (which could be the same or different from the one used in WLAN) to set up a new IMS PDU session for the NR network.
  • the process is seamless to the user, who notices little to no interruption in their VoIP call as they switch from WLAN to NR coverage.
  • the AMF [106] successfully identifies the original SMF [108] that facilitated the PDU session over WLAN, it proceeds to perform the handover by connecting with the identified SMF and transitioning the PDU session from the WLAN to the NR network. In either case, the call does not drop, and the service continues uninterrupted.
  • the present disclosure provides a technically advanced solution for performing handover from WLAN to New Radio (NR) in a wireless network.
  • the proposed invention reduces the time of IMS PDU not being in established and thereby user does not face call failures. Further, the present disclosure prevents failure of call of the UE when a handover takes places from the WLAN to NR in a wireless communication network.
  • the AMF instead of sending a negative response, attempt into an initial PDU establishment which prevent the reattempting of handover process, saves time, prevent delays during the handover process.
  • FIG. 5 illustrates an exemplary block diagram of a computer device [500] [also referred to herein as a computer system] upon which an embodiment of the present disclosure may be implemented.
  • the computing device implements the method for performing handover from WLAN to New Radio (NR) in a wireless network using the system [200] .
  • the computing device itself implements the method for performing handover from WLAN to New Radio (NR) in a wireless network by using one or more units configured within the computing device, wherein said one or more units are capable of implementing the features as disclosed in the present disclosure.
  • the computer system [500] encompasses a wide range of electronic devices capable of processing data and performing computations.
  • Examples of computer system [500] include, but are not limited only to, personal computers, laptops, tablets, smartphones, servers, and embedded systems.
  • the devices may operate independently or as part of a network and can perform a variety of tasks such as data storage, retrieval, and analysis.
  • computer system [500] may include peripheral devices, such as monitors, keyboards, and printers, as well as integrated components within larger electronic systems, sselling their versatility in various technological applications.
  • the computer system [500] may include a bus [502] or other communication mechanism for communicating information, and a processor [504] coupled with bus [502] for processing information.
  • the processor [504] may be, for example, a general-purpose microprocessor.
  • the computer system [500] may also include a main memory [506], such as a random-access memory (RAM), or other dynamic storage device, coupled to the bus [502] for storing information and instructions to be executed by the processor [504],
  • the main memory [506] also may be used for storing temporary variables or other intermediate information during execution of the instructions to be executed by the processor [504], Such instructions, when stored in non-transitory storage media accessible to the processor [504], render the computer system [500] into a special-purpose machine that is customized to perform the operations specified in the instructions.
  • the computer system [500] further includes a read only memory (ROM) [508] or other static storage device coupled to the bus [502] for storing static information and instructions for the processor [504],
  • ROM read only memory
  • a storage device [510], such as a magnetic disk, optical disk, or solid-state drive is provided and coupled to the bus [502] for storing information and instructions.
  • the computer system [500] may be coupled via the bus [502] to a display [512], such as a cathode ray tube (CRT), for displaying information to a computer user.
  • a display [512] such as a cathode ray tube (CRT)
  • An input device [514] may be coupled to the bus [502] for communicating information and command selections to the processor [504]
  • Another type of user input device may be a cursor controller [516], such as a mouse, a trackball, or cursor direction keys, for communicating direction information and command selections to the processor [504], and for controlling cursor movement on the display [512]
  • This input device typically has two degrees of freedom in two axes, a first axis (e.g., x) and a second axis (e.g., y), that allow the device to specify positions in a plane.
  • the computer system [500] may implement the techniques described herein using customized hard-wired logic, one or more ASICs or FPGAs, firmware and/or program logic which in combination with the computer system [500] causes or programs the computer system [500] to be a special -purpose machine.
  • the techniques herein are performed by the computer system [500] in response to the processor [504] executing one or more sequences of one or more instructions contained in the main memory [506], Such instructions may be read into the main memory [506] from another storage medium, such as the storage device [ 10], Execution of the sequences of instructions contained in the main memory [506] causes the processor [504] to perform the process steps described herein.
  • hardwired circuitry may be used in place of or in combination with software instructions.
  • the computer system [500] also may include a communication interface [518] coupled to the bus [502],
  • the communication interface [518] provides a two-way data communication coupling to a network link [520] that is connected to a local network [522].
  • the communication interface [518] may be an integrated services digital network (ISDN) card, cable modem, satellite modem, or a modem to provide a data communication connection to a corresponding type of telephone line .
  • the communication interface [518] may be a local area network (LAN) card to provide a data communication connection to a compatible LAN.
  • LAN local area network
  • Wireless links may also be implemented.
  • the communication interface [518] sends and receives electrical, electromagnetic or optical signals that carry digital data streams representing various types of information.
  • the computer system [500] can send messages and receive data, including program code, through the network(s), the network link [520] and the communication interface [518],
  • a server [530] might transmit a requested code for an application program through the Internet [528], the Internet Service Provider (ISP) [526], the Host [524], the local network [522] and the communication interface [518],
  • the received code may be executed by the processor [504] as it is received, and/or stored in the storage device [510], or other non-volatile storage for later execution.
  • the computing device [500] encompasses a wide range of electronic devices capable of processing data and performing computations. Examples of computing device [500] include, but are not limited only to, personal computers, laptops, tablets, smartphones, servers, and embedded systems. The devices may operate independently or as part of a network and can perform a variety of tasks such as data storage, retrieval, and analysis. Additionally, computing device [500] may include peripheral devices, such as monitors, keyboards, and printers, as well as integrated components within larger electronic systems, sselling their versatility in various technological applications. [0101] FIG. 6 illustrates an exemplary sequence diagram for performing handover from WLAN to New Radio (NR) in a wireless network, in accordance with exemplary embodiments of the present disclosure.
  • NR New Radio
  • the User Equipment (UE) [102] initiates a Protocol Data Unit (PDU) session establishment request.
  • the request contains a PDU Identifier (PDU ID) associated with an existing PDU session on a first type of network, such as a Wireless Local Area Network (WLAN) [602] .
  • PDU ID PDU Identifier
  • WLAN Wireless Local Area Network
  • the AMF [106] extracts the PDU ID from the received request to identify the appropriate SMF [108] responsible for the existing PDU session on the first network.
  • the AMF attempts to find the SMF [108] that is responsible for the existing PDU session using the PDU ID provided. This involves looking up the mapping of the PDU ID to the SMF [108],
  • step S4 if the AMF [106] finds SMF1 [108A], the AMF initiates the PDU session established with the SMF1 [108A],
  • step S5 if the AMF [106] fails to identify the existing SMF corresponding to the PDU ID (possibly due to various reasons such as network issues or mapping errors), the AMF [106] initiates a new PDU session establishment procedure i.e., selecting a new SMF, such as SMF2 [108B], to facilitate the establishment of a new PDU session.
  • a new PDU session establishment procedure i.e., selecting a new SMF, such as SMF2 [108B]
  • step S6 the new connection is established between the UE and the new SMF, thus successfully transitioning the PDU session from the first type of network (WLAN) to the second type of network (New Radio, NR).
  • WLAN wireless local area network
  • NR New Radio
  • a non-transitory computer-readable storage medium storing instruction for performing handover from WLAN to NR.
  • the instructions include executable code which, when executed by one or more units of a system, may cause a receiving unit [202] to receive, from a user equipment (UE) [102], a Protocol Data Unit (PDU) session establishment request, wherein the PDU session establishment request comprises a PDU Identifier (PDU ID) of an existing PDU session on a first type of network; an identifying unit [204] to identify an existing network node corresponding to the PDU ID tagged in the PDU session establishment request; and an initiating unit [206] to initiate a new PDU session establishment procedure via a target network node based on a failure of the identification of the existing network node corresponding to the PDU ID.
  • PDU ID PDU Identifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation se rapporte à un procédé et un système pour effectuer un transfert intercellulaire d'un WLAN à une nouvelle radio (NR) dans un réseau sans fil. La divulgation prévoit : la réception, en provenance d'un équipement utilisateur (UE) [102], d'une demande d'établissement de session d'unité de données de protocole (PDU), la demande d'établissement de session PDU comprenant un identifiant de PDU (ID de PDU) d'une session PDU existante sur un premier type de réseau; l'identification, par le nœud de réseau, d'un nœud de réseau existant correspondant à l'ID de PDU étiqueté dans la demande d'établissement de session PDU; et le lancement, par le nœud de réseau, d'une nouvelle procédure d'établissement de session PDU par l'intermédiaire d'un nœud de réseau cible sur la base d'une défaillance de l'identification du nœud de réseau existant correspondant à l'ID de PDU.
PCT/IN2024/050787 2023-07-05 2024-06-12 Procédé et système pour effectuer un transfert intercellulaire d'un wlan à une nouvelle radio (nr) dans un réseau sans fil Pending WO2025008895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202321045005 2023-07-05
IN202321045005 2023-07-05

Publications (1)

Publication Number Publication Date
WO2025008895A1 true WO2025008895A1 (fr) 2025-01-09

Family

ID=94171378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2024/050787 Pending WO2025008895A1 (fr) 2023-07-05 2024-06-12 Procédé et système pour effectuer un transfert intercellulaire d'un wlan à une nouvelle radio (nr) dans un réseau sans fil

Country Status (1)

Country Link
WO (1) WO2025008895A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220353941A1 (en) * 2021-04-29 2022-11-03 Mediatek Inc. Ma pdu reactivation requested handling

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023072597A1 (fr) * 2021-10-29 2023-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Unicité d'un id d'une session de pdu dans un réseau de communication
WO2023080542A1 (fr) * 2021-11-02 2023-05-11 Samsung Electronics Co., Ltd. Procédé et appareil de découpage en tranches de réseau dans un système de communication mobile

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023072597A1 (fr) * 2021-10-29 2023-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Unicité d'un id d'une session de pdu dans un réseau de communication
WO2023080542A1 (fr) * 2021-11-02 2023-05-11 Samsung Electronics Co., Ltd. Procédé et appareil de découpage en tranches de réseau dans un système de communication mobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220353941A1 (en) * 2021-04-29 2022-11-03 Mediatek Inc. Ma pdu reactivation requested handling

Similar Documents

Publication Publication Date Title
JP7135122B2 (ja) リダイレクション方法、通信システム及び通信装置
EP3425959A1 (fr) Transmissions de communication entre réseaux au moyen du spectre sans licence pour réseaux à commutation de circuits
US20220167217A1 (en) Devices and Methods for Supporting Handover of UE
WO2020200242A1 (fr) Procédé de traitement de session, dispositif de communication et système de communication
US11792694B2 (en) Packet-switched to circuit-switched handover during VOIP call initiation
WO2025008895A1 (fr) Procédé et système pour effectuer un transfert intercellulaire d'un wlan à une nouvelle radio (nr) dans un réseau sans fil
WO2025013058A1 (fr) Procédé et système d'identification et de suppression dynamiques de flux de débit binaire garanti (gbr) périmés
EP3961979B1 (fr) Sélection de réseaux fondée sur les capacités pour des dispositifs cellulaires
WO2025008894A1 (fr) Procédé et système pour maintenir une continuité d'appel pour un dispositif utilisateur
WO2025008888A1 (fr) Procédé mis en œuvre par un nœud de réseau pour gérer un transfert dans un réseau de communication
WO2025008977A1 (fr) Procédé et système de gestion de message d'échec d'établissement de contexte initial
WO2025008876A1 (fr) Procédé et système de mise sur liste d'autorisation de dispositifs compatibles avec vowifi
WO2025008898A1 (fr) Procédé et système de gestion de commande de libération d'unité de données de protocole initiée à partir d'une fonction de gestion de session
US20240205664A1 (en) Redirection of traffic instance identification in a 5g sa core network
RU2793337C1 (ru) Способ обработки сеанса, устройство связи и система связи
WO2025013035A1 (fr) Système et procédé de transmission d'informations d'emplacement utilisateur (uli) pendant un transfert
WO2025012933A1 (fr) Système et procédé pour assurer une continuité d'appel lors d'un transfert entre des réseaux mobiles terrestres publics
WO2025012932A1 (fr) Procédé et système de transfert entre un premier réseau et un second réseau
WO2025013070A1 (fr) Procédé et système de pointage de contrôle d'un appel dans un sous-système multimédia de protocole internet
WO2025008869A1 (fr) Procédé et système pour effectuer un enregistrement de réseau dans un réseau de communication sans fil
WO2025012921A1 (fr) Procédé et système de réenregistrement automatique de fonctions de réseau dans un réseau de communication
WO2025012979A1 (fr) Procédé et système aux fins d'une gestion basée sur la configuration d'une demande de procédure
WO2025008919A1 (fr) Procédé et système d'identification d'un nœud scscf associé à une partie émettrice
WO2025012923A1 (fr) Procédé et système de synchronisation en temps réel d'une ou de plusieurs entités de réseau
WO2025008907A1 (fr) Procédé et système de transmission de radiomessagerie

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24835617

Country of ref document: EP

Kind code of ref document: A1