FORM 2
THE PATENTS ACT, 1970 (39 OF 1970) & THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
“SYSTEM AND METHOD FOR MANAGING SUPPLEMENTARY SERVICES IN A MULTI-NETWORK
ENVIRONMENT”
We, Jio Platforms Limited, an Indian National, of Office - 101, Saffron, Nr. Centre Point, Panchwati 5 Rasta, Ambawadi, Ahmedabad - 380006, Gujarat, India.
The following specification particularly describes the invention and the manner in which it is to be performed.

SYSTEM AND METHOD FOR MANAGING SUPPLEMENTARY SERVICES IN A MULTI-NETWORK ENVIRONMENT
FIELD OF INVENTION
[0001] Embodiments of the present disclosure relates generally to the field of wireless communication systems. In particular, embodiments of the present disclosure relate to enabling uninterrupted use of supplementary services across different network coverages. More particularly, embodiments of the present disclosure relate to method and system for managing one or more supplementary services in a multi-network environment.
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 aspects 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] Traditionally, Home Subscriber Server (HSS) and Home Location Register (HLR) may use different databases to manage supplementary services. The supplementary services may refer to additional features or functionalities provided by network operator(s) to subscribers beyond basic voice and data services. These may include services such as call forwarding, call waiting, caller ID, voicemail, and others aimed at enhancing the user experience and adding value to their telecommunications service. Since the databases/ data sources for managing supplementary services are separate and may lead to inconsistencies in the status of these services as the subscriber moves between different network generations such as 2nd generation network, 3rd generation network, 4th generation network or 5th generation network etc. Because HSS and HLR could be using separate databases, there might be a need for synchronization mechanisms to keep the databases updated and in sync with each other. These synchronization processes might be complex, prone to errors, and can cause delays. In the current state, a subscriber moving from a 5G/4G network to a 2G network (or vice versa) might experience a discontinuity in their supplementary services. This is because the services might not be enabled/disabled consistently across all networks due to the different databases and synchronization mechanisms being used. Further, different vendors might have their own methods to handle the synchronization and management of supplementary services across different network generations. This leads to a lack of standardization, making inter-vendor compatibility and integration a potential challenge. Maintaining separate databases and synchronization mechanisms might not be the most efficient use of resources. It might cause higher maintenance overhead, increased complexity, and lead to inefficiencies in network operations.

[0005] Therefore, in light of the foregoing discussion, there exists a need to overcome the aforementioned drawbacks.
OBJECTS OF THE DISCLOSURE
[0006] Some of the objects of the present disclosure, which at least one embodiment disclosed herein satisfies are listed herein below.
[0007] It is an object of the present disclosure to provide a method and system for managing one or more supplementary services in a multi-network environment.
[0008] It is another object of the present disclosure to provide a method and system for managing one or more supplementary services in a multi-network environment, that unify the management of supplementary services data across different generations of mobile networks (e.g., 2G, 4G, or 5G etc.) using a common data repository (e.g., MMTEL-SERVICES).
[0009] It is another object of the present disclosure to provide a method and system for managing one or more supplementary services in a multi-network environment, that provide seamless service continuity for subscribers moving across different network generations. This means that if a subscriber enables or disables any supplementary service in one network, the status of that service should remain consistent if they move to another network.
[0010] It is another object of the present disclosure to provide a method and system for managing one or more supplementary services in a multi-network environment, that eliminate the need for separate synchronization mechanisms between the Home Subscriber Server (HSS) and the Home Location Register (HLR).
[0011] Also, an object of the present disclosure is to utilise the common supplementary services data in a multi-network environment by using the same

repository of data, ensuring that changes made in one system are automatically reflected in the other.
[0012] It is another object of the present disclosure to provide a standard method of handling supplementary services across network generations for better interoperability between different vendors and to make the overall system more efficient.
[0013] It is another object of the present disclosure to provide a method and a system for managing one or more supplementary services in a multi-network environment, that utilizes a common data repository for HSS and HLR applications to reduce the complexity associated with managing and synchronizing separate databases.
[0014] Also, an object of the present disclosure is to provide a method and a system for utilizing common supplementary services data in a multi-network environment that can lead to lower maintenance costs and increased system reliability.
[0015] It is yet another object of the present disclosure to provide a method and system for managing one or more supplementary services in a multi-network environment, that ensures uninterrupted use of supplementary services across different network coverage.
[0016] It is yet another object of the present disclosure to provide a solution that can enhance the user experience for mobile subscribers by updating status of services to the mobile subscribers while a movement of mobile device between different network areas.

[0017] 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.
[0018] A first aspect of the present disclosure is relating to a method for managing one or more supplementary services in a multi-network environment. The said method comprises receiving, by a transceiver unit, a request to modify the one or more supplementary services from a subscriber registered on a first network. Further the method encompasses storing, by a storage unit via a home subscriber server (HSS), a set of changes corresponding to modification of one or more supplementary services, in a common repository. Further, the method encompasses synchronizing, by a control unit, the stored set of changes corresponding the modification of one or more supplementary services with a Home Location Register (HLR). Thereafter, the method comprises registering, by a registration unit, the subscriber on a second network, wherein one of the modified one or more supplementary services on the first network are accessible for usage on the second network based on the synchronization.
[0019] Further, according to another aspect of the present disclosure, the first network is one of a 4G network and a 5G network and the second network is a 2G network.
[0020] Furthermore, according to an aspect of the present disclosure, the common repository is a Multimedia Telephony (MMTEL) services repository.
[0021] Also, according to an aspect of the present disclosure, the one or more supplementary services are selected from a group consisting of at least one of a call forwarding, a call waiting, a voicemail, and a multimedia telephony (MMTEL) service.

[0022] Another aspect of the present disclosure relates to a system for managing one or more supplementary services in a multi-network environment. The system comprises a transceiver unit configured to receive a request to modify the one or more supplementary services from a subscriber registered on a first network. Further, the system comprises a storage unit connected to at least the transceiver unit, the storage unit is configured to store, via a home subscriber server (HSS), a set of changes corresponding to modification of one or more supplementary services, in a common repository. The system further comprises a control unit connected to at least the storage unit, the control unit is configured to synchronize the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR). Furthermore, the system comprises a registration unit connected to at least the control unit, the control unit is configured to register the subscriber on a second network, wherein one of the modified one or more supplementary on the first network are accessible for usage on the second network based on the synchronization.
[0023] Yet another aspect of the present disclosure relates to a non-transitory computer readable storage medium storing executable instructions for managing one or more supplementary services in a multi-network environment. The instructions when executed by one or more units of a system, causes: a transceiver unit of the system to receive a request to modify the one or more supplementary services from a subscriber registered on a first network; a storage unit of the system to store, via a home subscriber server (HSS), a set of changes corresponding to modification of one or more supplementary services, in a common repository; a control unit of the system to synchronize the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR); and a registration unit of the system to register the subscriber on a second network, wherein one of the modified one or more supplementary on the first network are accessible for usage on the second network based on the synchronization.

BRIEF DESCRIPTION OF DRAWINGS
[0024] The accompanying drawings, which are incorporated herein, and constitute a part of this disclosure, illustrate exemplary embodiments of the disclosed methods and systems in which like reference numerals refer to the same parts throughout the different drawings. Components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Some drawings may indicate the components using block diagrams and may not represent the internal circuitry of each component. It will be appreciated by those skilled in the art that disclosure of such drawings includes disclosure of electrical components, electronic components or circuitry commonly used to implement such components.
[0025] FIG. 1 illustrates an exemplary block diagram representation of 5th generation core (5GC) network architecture [100].
[0026] FIG. 2 illustrates an exemplary diagram of a network architecture [200] for managing one or more supplementary services in a multi-network environment, in accordance with exemplary embodiments of the present disclosure.
[0027] FIG. 2a illustrates an exemplary block diagram of a system [200a] for managing one or more supplementary services in a multi-network environment, in accordance with exemplary embodiments of the present disclosure.
[0028] FIG. 3 illustrates an exemplary method flow diagram indicating the process [200a] for managing one or more supplementary services in a multi-network environment, in accordance with exemplary embodiments of the present disclosure.
[0029] FIG. 4 illustrates an exemplary block diagram of a computing device upon which an embodiment of the present disclosure may be implemented, in accordance with exemplary embodiments of the present disclosure.

[0030] The foregoing shall be more apparent from the following more detailed description of the disclosure.
DETAILED DESCRIPTION
[0031] In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent, however, that embodiments of the present disclosure may be practiced without these specific details. Several features described hereafter can each be used independently of one another or with any combination of other features. An individual feature may not address any of the problems discussed above or might address only some of the problems discussed above. Some of the problems discussed above might not be fully addressed by any of the features described herein. Example embodiments of the present disclosure are described below, as illustrated in various drawings in which like reference numerals refer to the same parts throughout the different drawings.
[0032] The ensuing description provides exemplary embodiments only, and is not intended to limit the scope, applicability, or configuration of the disclosure. Rather, the ensuing description of the exemplary embodiments will provide those skilled in the art with an enabling description for implementing an exemplary embodiment. It should be understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the disclosure as set forth.
[0033] It should be noted that the terms "mobile device", "user equipment", "user device", “communication device”, “device” and similar terms are used interchangeably for the purpose of describing the disclosure. These terms are not intended to limit the scope of the disclosure or imply any specific functionality or

limitations on the described embodiments. The use of these terms is solely for convenience and clarity of description. The disclosure is not limited to any particular type of device or equipment, and it should be understood that other equivalent terms or variations thereof may be used interchangeably without departing from the scope of the disclosure as defined herein.
[0034] Specific details are given in the following description to provide a thorough understanding of the embodiments. However, it will be understood by one of ordinary skill in the art that the embodiments may be practiced without these specific details. For example, circuits, systems, networks, processes, and other components may be shown as components in block diagram form in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, processes, algorithms, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.
[0035] Also, it is noted that individual embodiments may be described as a process which is depicted as a flowchart, a flow diagram, a data flow diagram, a structure diagram, or a block diagram. Although a flowchart may describe the operations as a sequential process, many of the operations can be performed in parallel or concurrently. In addition, the order of the operations may be re-arranged. A process is terminated when its operations are completed but could have additional steps not included in a figure.
[0036] The word “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. In addition, 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. Furthermore, to the extent that the terms “includes,” “has,” “contains,” and other similar words are used in either the detailed

description or the claims, such terms are intended to be inclusive—in a manner similar to the term “comprising” as an open transition word—without precluding any additional or other elements.
[0037] As used herein, 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. For instance, 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.
[0038] Further, 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.

[0039] As portable electronic devices and wireless technologies continue to improve and grow in popularity, the advancing wireless technologies for data transfer are also expected to evolve and replace the older generations of technologies. In the field of wireless data communications, the dynamic advancement of various generations of cellular technology are also seen. The development, in this respect, has been incremental in the order of second generation (2G), third generation (3G), fourth generation (4G), and now fifth generation (5G), and more such generations are expected to continue in the forthcoming time.
[0040] Radio Access Technology (RAT) 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.
[0041] Further, gNodeB (gNB) refers to the base station component in 5G (fifth generation) wireless networks. It is an essential element of the Radio Access Network (RAN) responsible for transmitting and receiving wireless signals to and from user devices, such as smartphones, tablets, and Internet of Things (IoT) devices. In 5G networks, there may be similar components as present in other generations of wireless networks. Here are a few examples: Base Transceiver Station (BTS): In 2G (second-generation) networks, the BTS serves as the base

station responsible for transmitting and receiving wireless signals. It connects mobile devices to the cellular network infrastructure. NodeB: In 3G (third generation) networks, the NodeB is the base station component that enables wireless communication. It facilitates the transmission and reception of signals between user devices and the network. eNodeB: In 4G (fourth generation) LTE (Long-Term Evolution) networks, the eNodeB serves as the base station. It supports high-speed data transmission, low latency, and improved network capacity. Access Point (AP): In Wi-Fi networks, an access point functions as a central hub that enables wireless devices to connect to a wired network. It provides a wireless interface for devices to access the network and facilitates communication between them. The examples illustrate the base station components in different generations of wireless networks, such as BTS in 2G, NodeB in 3G, eNodeB in 4G LTE, and gNodeB in 5G. Each component plays a crucial role in facilitating wireless connectivity and communication between user devices and the network infrastructure.
[0042] As used herein, CFX stands for Control function such as a call session control function (CSCF) which improved network performance or functionality.
[0043] BSF stands for Bootstrapping Server Function. This function provides authentication and security key management services for UE registration and network access.
[0044] TAS stands for Telephony Application Server (TAS). It is capable of handling VoLTE, fixed, and enterprise subscribers simultaneously.
[0045] MSC stands for Mobile Switching Center, and it serves as a central switching hub that connects mobile devices (such as cell phones) to the public switched telephone network (PSTN) or other mobile networks. Its function is to manage call routing, call setup, and handovers between different cells within the

network. It also handles functions such as authentication, billing, and mobility management for mobile subscribers.
[0046] GMSC stands for Gateway Mobile Switching Center, and it serves as a
5 gateway between the mobile network and external networks. Its function is when a
call originates from a mobile device and is destined for a subscriber on an external network (e.g., a landline phone), the GMSC is responsible for routing the call to the appropriate destination.
10 [0047] The MSC and GMSC may play a role in facilitating the routing and
management of supplementary services across different network generations (2G, 4G, 5G). They may interact with the Home Subscriber Server (HSS) and Home Location Register (HLR) applications to ensure the synchronization and continuity of supplementary services for subscribers across different network technologies.
15
[0048] MMTEL refers to Multimedia Telephony Services, encompassing various multimedia communication functionalities like voice and video calls over IP-based networks. MMTEL's function within the disclosure lies in facilitating the management and provision of supplementary services across different network
20 generations (2G, 4G, 5G). By maintaining a common MMTEL services repository
data accessed by both the Home Subscriber Server (HSS) and Home Location Register (HLR) applications, the disclosure ensures seamless synchronization and continuity of supplementary services for subscribers. This repository stores changes related to enabled or disabled or modified supplementary services requested by
25 subscribers while registered in 4G or 5G networks, allowing the HSS and HLR
applications to derive, enable, or disable supplementary services across various network technologies without requiring a separate synchronization mechanism. The Home Subscriber Server (HSS) front end (FE) application to use common data for activation and deactivation of any supplementary services This integration
30 enhances user experience, reduces the need for vendor-specific customizations, and
ensures consistent service delivery across different network environments.
14

[0049] All modules, units, components used herein may be software modules that
may be implemented via hardware modules (e.g., via a processor) or hardware
processors, the processors being a general-purpose processor, a special purpose
5 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.
Furthermore, all the units in the system are interconnected, so they can
10 communicate and work together smoothly.
[0050] As discussed in the background section, traditionally, Home Subscriber Server (HSS) and Home Location Register (HLR) may use different databases to manage supplementary services. The fact that data sources are separate may lead to
15 inconsistencies in the status of these services as the subscriber moves between
different network generations. Because HSS and HLR could be using separate databases, there is a need for synchronization mechanisms to keep the databases updated and in sync. These synchronization processes are complex, prone to errors, and can cause delays. In the current state, a subscriber moving from a 5G/4G
20 network to a 2G network (or vice versa) might experience a discontinuity in their
supplementary services. This is because the services might not be enabled/disabled consistently across all networks due to the different databases and synchronization mechanisms being used. Further, different vendors might have their own methods to handle the synchronization and management of supplementary services across
25 different network generations. This leads to a lack of standardization, making inter-
vendor compatibility and integration a potential challenge. Maintaining separate databases and synchronization mechanisms might not be the most efficient use of resources. It might cause higher maintenance overhead, increase complexity, and lead to inefficiencies in network operations.
30
15

[0051] To address the above-mentioned limitations of the existing solutions related to management of supplementary services, an improved methodology is required that addresses these challenges by providing a unified and efficient method for managing supplementary services across different network generations. 5
[0052] The present disclosure relates generally to the field of wireless
communication systems. In particular, the present disclosure relates to enabling
uninterrupted use of supplementary services across different network coverages.
More particularly, the present disclosure relates to system and method for managing
10 one or more supplementary services in a multi-network environment.
[0053] The present disclosure provides a technical solution for managing one or more supplementary services in a multi-network environment. The solution comprising receiving a request from a subscriber to enable or disable a
15 supplementary service while the subscriber is initially registered in a 4G or 5G
network and moved to a 2G network coverage. The said solution provides a means to utilize common supplementary services data across various networks, such as 4G or 5G or 2G, for subscribers. The solution involves handling requests from subscribers to turn on or off these services while they're connected to these
20 networks. The solution encompasses saving changes related to these supplementary
services in a shared MMTEL-SERVICES database through an HSS application. The said solution involves registering the subscriber on the 2G network and letting them access the same extra services as on 4G or 5G. By tapping into this shared database, both the HSS and HLR applications can manage, activate, or deactivate
25 these services without needing a separate syncing system. This solution ensures that
the services remain consistent across different network types, enhancing user satisfaction and minimizing the need for specialized adjustments from vendors.
[0054] Hereinafter, exemplary embodiments of the present disclosure will be
30 described with reference to the accompanying drawings.
16

[0055] FIG. 1 illustrates an exemplary block diagram representation of 5th
generation core (5GC) network architecture, in accordance with exemplary
implementation of the present disclosure. As shown in FIG. 1, the 5GC network
architecture [100] includes a user equipment (UE) [102], a radio access network
5 (RAN) [104], an access and mobility management function (AMF) [106], a Session
Management Function (SMF) [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
10 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) [128], a data network (DN) [130], 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.
15
[0056] Radio Access Network (RAN) [104] 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
20 wireless communication.
[0057] Access and Mobility Management Function (AMF) [106] is a 5G core
network function responsible for managing access and mobility aspects, such as UE
registration, connection, and reachability. It also handles mobility management
25 procedures like handovers and paging.
[0058] 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
30 forwarding and handles IP address allocation and QoS enforcement.
17

[0059] 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.
5
[0060] Authentication Server Function (AUSF) [112] is a network function in the
5G core responsible for authenticating UEs during registration and providing
security services. It generates and verifies authentication vectors and tokens.
10 [0061] Network Slice Specific Authentication and Authorization Function
(NSSAAF) [114] is a network function that provides authentication and authorization services specific to network slices. It ensures that UEs can access only the slices for which they are authorized.
15 [0062] 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.
[0063] Network Exposure Function (NEF) [118] is a network function that exposes
20 capabilities and services of the 5G network to external applications, enabling
integration with third-party services and applications.
[0064] Network Repository Function (NRF) [120] is a network function that acts
as a central repository for information about available network functions and
25 services. It facilitates the discovery and dynamic registration of network functions.
[0065] Policy Control Function (PCF) [122] is a network function responsible for
policy control decisions, such as QoS, charging, and access control, based on
subscriber information and network policies.
30
[0066] Unified Data Management (UDM) [124] is a network function that
centralizes the management of subscriber data, including authentication,
authorization, and subscription information.
18

[0067] Application Function (AF) [126] is a network function that represents
external applications interfacing with the 5G core network to access network
capabilities and services.
5
[0068] User Plane Function (UPF) [128] is a network function responsible for
handling user data traffic, including packet routing, forwarding, and QoS
enforcement.
10 [0069] Data Network (DN) [130] refers to a network that provides data services to
user equipment (UE) in a telecommunications system. The data services may include but are not limited to Internet services, private data network related services.
[0070] Referring to FIG. 2 that illustrates an exemplary diagram of a network
15 architecture [200] for managing one or more supplementary services in a multi-
network environment, in accordance with exemplary embodiments of the present disclosure.
[0071] As shown in FIG. 2, user equipment [102] is connected to wireless
20 communication networks such as a 4G network or a 5G network [203] or a 2G
network [219]. Further, some of the corresponding entities/units of these networks
are depicted in the FIG. 2 such as Control Function (CFX), Bootstrapping Server
Function (BSF), Telephony Application Server (TAS), Home Subscriber Server
(HSS) [205], Home Location Register (HLR) [207], Multimedia Telephony
25 Services (MMTEL-SERVICES) repository [209], and Mobile Switching
Centre/Gateway Mobile Switching Center (MSC/GMSC). The details and functionality of these units are provided in foregoing paragraphs.
[0072] It is pertinent to note that the system [200a] as disclosed in the present
30 disclosure works in conjunction with one or more of these units to facilitate
management of one or more supplementary services in a multi-network
19

environment. The interfaces and interactions between these nodes, such as the Sh
interface and the MAP-SS protocol, enable various network entities to
communicate and perform their functions. The HSS supports the Sh interface with
application servers, such as the TAS, to perform network operations. The Sh
5 interface facilitates the exchange of information between the HSS and application
servers, enabling the TAS to manage telephony applications based on the subscriber's profile. The MAP-SS protocol ensures that the services provided to the subscriber are consistent different network environments, such as 2G, 3G, 4G, and 5G networks.
10
[0073] Further, referring to FIG. 2a that illustrates an exemplary detail block diagram of the system [200a] for managing supplementary service(s) in a multi-network environment, in accordance with exemplary embodiments of the present disclosure.
15
[0074] As depicted in FIG. 2a, the system [200a] comprises at least one transceiver unit [211], at least one storage unit [213], at least one control unit [215], and at least one registration unit [217]. All of the components as shown in the block diagram are connected to each other. All of the components as mentioned in the block
20 diagram lies within the system [200a] and shall be considered to be interconnected
with each other. Also, in FIG. 2a only a few units are shown, however, the system [200a] may comprise multiple such units or the system [200a] may comprise any such numbers of said units, as required to implement the features of the present disclosure. Further, the system [200a] may be present at a network end or server
25 end to implement the features of the present disclosure.
[0075] Also, the components/ units of the system [200a] may be present at the same
location or may be distributed at different locations. Also, a component of the
system [200a] may comprise one or more sub-components which may be
30 centralized or distributed at various locations and may together be referred to as that
particular component.
20

[0076] The system [200a] is configured for managing one or more supplementary
services in a multi-network environment, with the help of interconnection between
the components/ units of the system [200a]. As used herein a supplementary service
5 is an additional service provided by a network operator beyond basic voice calls
and may include features like call waiting, Call Forwarding, Call Barring, Call
Waiting, Originating Identity Presentation, Originating Identity Restriction,
Terminating Identity Presentation, Terminating Identity Restriction, Music-On
Hold, Audio-Video Upgrade/Downgrade, Call Swap, etc. These services can be
10 controlled using any of the two methods:
• Using Facility Calls: Subscriber dials the service manipulation star codes to
activate/deactivate the supplementary service data.
• Using Ut Interface messages via the Authentication Proxy (NAF and BSF)
15 [0077] Initially, for managing the supplementary service(s) in the multi-network
environment, the transceiver unit [211] of the system [200a] is configured to receive one of a request to enable the one or more supplementary services and a request to disable the one or more supplementary services from a subscriber registered on a first network. The one or more supplementary services are selected from a group
20 consisting at least one of a call forwarding, a call waiting, a voicemail, and a
multimedia telephony (MMTEL) service. Also, the first network is one of a 4G network and a 5G network [203].
[0078] Therefore, initially the transceiver unit [211] of the system [200a] is
25 configured to receive a request from a subscriber to modify one or more
supplementary services while the subscriber is registered in a 4G or 5G network
[203]. In other words, the present disclosure encompasses that a request is received
at the system [200a] when a subscriber who is registered in the 4G or 5G network
[203] decides to enable or disable a supplementary service. This request is
30 transmitted to the system [200a] through a user device of the subscriber or through
21

a mobile network operator facilitating wireless communication services to the user device.
[0079] Further, the storage unit [213] is connected to at least the transceiver unit
5 [211], the storage unit [213] is configured to store, via the Home Subscriber Server
(HSS) [205], a set of changes corresponding to modification of the one or more supplementary services, in a common repository. The common repository may be a Multimedia Telephony (MMTEL) services repository [209]. Therefore, the storage unit [213] is configured to store, via the Home Subscriber Server (HSS)
10 [205], changes related to the modified one or more supplementary services in the
MMTEL services repository [209]. In other words, upon receiving the request, the status of the supplementary services is updated in the MMTEL services repository [209]. This is done via the Home Subscriber Server (HSS) [205] application. The HSS [205] is a key component of modern mobile networks, holding important
15 subscriber data such as service profiles, location information, and authentication
data. According to the present disclosure, the HSS [205] is responsible for making changes to the supplementary services data in the MMTEL services repository [209].
20 [0080] Once the set of changes are stored in the common repository, the control
unit [215] connected to at least the storage unit [213], the control unit [215] is configured to synchronize the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR) [207]. Therefore, the present disclosure encompasses synchronizing, via the
25 HSS [205] and the Home Location Register (HLR) [207] services, the stored
changes related to the modification of one or more supplementary services in the data repository to manage the one or more supplementary services, thereby eliminating the need for a separate synchronization mechanism between the HSS [205] and the HLR [207]. In other words, the present disclosure encompasses
30 utilizing the MMTEL services Repository [209] by the HSS [205] and the HLR
[207]. Both the HSS [205] and the Home Location Register (HLR) [207]
22

application use the same MMTEL services repository [209] to derive, modify
supplementary services. The HLR [207] is a database used for storing and managing
subscriptions associated with the network. By synchronizing the same repository,
the need for a separate synchronization mechanism between the HSS [205] and the
5 HLR [207] is eliminated. Further, the present disclosure entails synchronization and
continuity across networks. The use of the common MMTEL services repository
[209] by both the HSS [205] and the HLR [207] applications ensures that the status
of supplementary services is synchronized and maintained across different network
generations (e.g., 2G, 4G, or 5G). This synchronization ensures that the subscriber's
10 experience is seamless as they move between different network generations, and
also reduces the need for vendor-specific customizations, making the system more efficient and standardized.
[0081] Further, after synchronization, the registration unit [217] connected to at
15 least the control unit [215], the registration unit [217] is configured to register the
subscriber on a second network, wherein the second network is a 2G network [219] and wherein one of the modified one or more supplementary services on the first network are accessible for usage on the second network based on the synchronization. Therefore, the present disclosure encompasses registering the
20 subscriber in a 2G network [219] and permitting usage of the one or more
supplementary services enabled or disabled during the 4G or 5G network [203] coverage. In other words, the present disclosure encompasses subscriber registration in a 2G Network [219] in a manner for instance if the subscriber registers in the 2G network [219] from a 4G or 5G network [203], perhaps due to
25 traveling or network coverage changes, the system [200a] allows them to use the
same supplementary services which were enabled or disabled during their time in the 4G or 5G network [203]. This is because the 2G network [219] can access the same MMTEL-SERVICES repository [209] to determine the status of the subscriber's supplementary services.
30
23

[0082] It would be appreciated by the person skilled in the art that the disclosed system [200a] for managing supplementary services across different mobile networks in a way improves the user experience and increases system efficiency.
5 [0083] Considering an example, where a subscriber/user is currently connected to
a 5G network. He wants to enable Call Forwarding because he will be busy for the next few hours and wants any incoming calls to be redirected to his secretary. He makes this request through his mobile device, either by changing the settings on his device directly or by contacting his mobile network operator. User's request to
10 enable Call Forwarding is processed by the network and sent to the Home
Subscriber Server (HSS) [205] application. The HSS [205] application then updates the status of the Call Forwarding service for User in the MMTEL-SERVICES repository [209]. The repository now indicates that Call Forwarding has been enabled for User. Later in the day, User travels to a rural area where there is only
15 2G network coverage. His mobile device automatically registers with the 2G
network [219]. Despite the change in network generation, the user wants his Call Forwarding service to remain active. The 2G network's Home Location Register (HLR) [207] application checks the MMTEL-SERVICES repository [209] to determine the status of User's supplementary services. It sees from the repository
20 that Call Forwarding is enabled for User. It does not need to check with the HSS
[205] or use any other synchronization mechanism because the repository is shared, and the data is always synchronized. Because of the common MMTEL services repository [209], User's Call Forwarding service remains active even after he switched from a 5G network [203] to a 2G network [219]. This ensures that his
25 experience is seamless, despite the change in network coverage. It also means the
network operator doesn't need to have any vendor-specific customizations to manage the supplementary service across different network generations. In this way, User can move between network generations without any impact on his supplementary services. He doesn't have to worry about enabling or disabling Call
30 Forwarding each time he changes networks, because the system manages this
24

automatically based on the data in the common MMTEL services repository [209]. This provides a more efficient and seamless user experience for User.
[0084] Referring to FIG. 3 an exemplary method flow diagram [300], for managing
5 one or more supplementary services in a multi-network environment, in accordance
with exemplary embodiments of the present disclosure is shown. In an implementation the method [300] is performed by the system [200a], wherein the system [200a] may be configured at a network end or at a server end. As indicated in the FIG. 3, the method [300] begins at step [302] and proceeds to step [304].
10
[0085] At step [304], the method [300] as disclosed by the present disclosure comprises receiving, by a transceiver unit [211], a request to modify the one or more supplementary services from a subscriber registered on a first network. The one or more supplementary services are selected from a group consisting of at least
15 one of a call forwarding, a call waiting, a voicemail, and a multimedia telephony
(MMTEL) service [209]. The first network is one of a 4G network and a 5G network [203]. Therefore, the method encompasses receiving, by the transceiver unit [211], a request from a subscriber to modify while the subscriber is registered in a 4G or 5G network [203]. In the context of mobile networks, a subscriber is a user who is
20 registered with a mobile network operator and uses their services. Supplementary
services are additional services provided by the network operator beyond basic voice calls and can include features like call waiting, call Forwarding, call Barring, call Waiting, Originating Identity Presentation, Originating Identity Restriction, Terminating Identity Presentation, Terminating Identity Restriction, Music-On
25 Hold, Audio-Video Upgrade/Downgrade, call Swap. In a modern mobile network,
such as a 4G or 5G network [203], the subscriber can control these supplementary services, choosing to modify them as per their preference. To do this, the subscriber would typically go through a specific process, often depending on the interface provided by the network operator or device manufacturer. For instance, the
30 subscriber might modify these services through a settings menu on their device, or
by dialling specific service codes, or even through an online account portal provided
25

by the network operator. Once the subscriber has decided to modify a supplementary service and completed the necessary steps, a request is sent from their device to the network. This request is transmitted over the network to the relevant systems that manage these services. 5
[0086] For example, if a subscriber wishes to enable the call forwarding feature while they are connected to a 4G network, they might go into their phone settings and input the number they want their calls forwarded to. After confirming this, a request is sent from the subscriber’s phone over the 4G network to enable call
10 forwarding. It is this request that the network, and more specifically the Home
Subscriber Server (HSS) [205] application, receives and acts upon. The HSS application [205] is responsible for managing the subscriber’s data and service settings, and it processes this request to enable or disable the specific supplementary service.
15
[0087] Next, at step [306], the method [300] as disclosed by the present disclosure comprises storing, by a storage unit [213] via a home subscriber server (HSS) [205], a set of changes corresponding to modification of one or more supplementary services, in a common repository. The common repository is a Multimedia
20 Telephony (MMTEL) services repository [209]. The method therefore at this step
encompasses storing, by the storage unit [213] via the home subscriber server (HSS) [205], changes related to the modification of one or more supplementary services in a MMTEL services repository [209]. Further, the stored changes related to the modified one or more supplementary services in the MMTEL services repository
25 [209] is accessed by map gateway (mapGW) to determine status of the one or more
supplementary services when the subscriber is registered in a 2G network [219]. Also, the changes related to the modify one or more supplementary services in the MMTEL services repository [209] are selected from changes in a group consisting of at least one of a call forwarding, a call waiting, a voicemail, and a multimedia
30 telephony (MMTEL) service. The changes related to the modified supplementary
services are therefore stored in a common MMTEL services repository [209] via
26

the Home Subscriber Server (HSS) [205] application. The Home Subscriber Server
(HSS) [205] is a key element in mobile networks, specifically in 4G and 5G
architectures. It is a central database that contains user-related and subscription-
related information. Its roles include managing the user profiles, performing
5 authentication and authorization of the users, and providing information about the
subscribers’ location. In this context, when a subscriber sends a request to modify a supplementary service (for example, activating or deactivating call forwarding), the HSS [205] receives this request. The HSS [205] application then processes this request by changing the status of the corresponding supplementary service.
10 However, instead of maintaining this information solely within its own database,
the HSS [205] updates these changes in a common repository known as the MMTEL services repository [209]. MMTEL (Multimedia Telephony) is a supplementary service itself that provides multimedia services in LTE (Long Term Evolution) and other IP-based networks. The MMTEL services repository [209] is
15 a common or shared repository, which means that it is accessible by different
applications or elements in the network, not just the HSS [205]. This is key in ensuring that the supplementary services status is consistent across different network elements and can be accessed irrespective of the network type (2G, 4G, or 5G). So, when a change is made to the status of a supplementary service, the HSS
20 [205] application updates this information in the MMTEL services repository [209].
This ensures that the changes are centrally stored and can be accessed by the necessary network elements, providing a consistent user experience as the subscriber moves across different network types.
25 [0088] Next, at step [308], the method [300] encompasses synchronizing, by a
control unit [215], the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR) [207]. In an instance the control unit [215] by the HSS [205] and a home location register (HLR) [207] services, synchronizes the stored changes related to the modification
30 one or more supplementary services in the data repository to manage the one or
more supplementary services, thereby eliminating the need for a separate
27

synchronization mechanism between the HSS [205] and the HLR [207]. Further,
the method comprises real-time synchronization, by the control unit [215], of
changes in status of the one or more supplementary services such that the changes
are instantaneously reflected in the MMTEL services repository [209], ensuring
5 real-time synchronization between the HSS [205] and the HLR [207].
[0089] Next, at step [310], the method [300] comprises registering, by a registration unit [217], the subscriber on a second network, wherein the second network is a 2G network [219] and wherein one of the modified one or more supplementary services
10 on the first network are accessible for usage on the second network based on the
synchronization. Therefore, at this step the method comprises registering, by the registration unit [217], the subscriber in a 2G network [219] and permitting usage of the one or more supplementary services modified during the 4G or 5G network [203] coverage. In other words, the present disclosure encompasses registering the
15 subscriber in the 2G network [219] and allowing the subscriber to use the same
supplementary services modify during the 4G or 5G network [203] coverage.
[0090] It would be appreciated by the person skilled in the art that the innovation here lies in allowing the subscriber to use the same supplementary services that
20 were enabled or disabled during their time on the 4G or 5G network [203], while
they are now on the 2G network [219]. Instead of the 2G network [219] trying to manage these services separately, the system [200a] allows for the use of the same supplementary services settings that were stored in the MMTEL services repository [209] by the HSS [205]. This ensures consistency in the subscriber's services,
25 regardless of the network they are currently registered on.
[0091] Thereafter, the method terminates at step [312].
[0092] FIG. 4 illustrates an exemplary block diagram of a computing device [400]
30 upon which an embodiment of the present disclosure may be implemented. In an
implementation, the computing device [400] implements the method [300] for
28

managing one or more supplementary services in a multi-network environment by
utilising the system [200a]. In another implementation, the computing device [400]
itself implements the method [300] for managing one or more supplementary
services in a multi-network environment using one or more units configured within
5 the computing device [400], wherein said one or more units are capable of
implementing the features as disclosed in the present disclosure.
[0093] The computing device [400] may include a bus [402] or other communication mechanism for communicating information, and a hardware
10 processor [404] coupled with bus [402] for processing information. The hardware
processor [404] may be, for example, a general-purpose microprocessor. The computing device [400] may also include a main memory [406], such as a random-access memory (RAM), or other dynamic storage device, coupled to the bus [402] for storing information and instructions to be executed by the processor [404]. The
15 main memory [406] also may be used for storing temporary variables or other
intermediate information during execution of the instructions to be executed by the processor [404]. Such instructions, when stored in non-transitory storage media accessible to the processor [404], render the computing device [400] into a special-purpose machine that is customized to perform the operations specified in the
20 instructions. The computing device [400] further includes a read only memory
(ROM) [408] or other static storage device coupled to the bus [402] for storing static information and instructions for the processor [404].
[0094] A storage device [410], such as a magnetic disk, optical disk, or solid-state
25 drive is provided and coupled to the bus [402] for storing information and
instructions. The computing device [400] may be coupled via the bus [402] to a
display [412], such as a cathode ray tube (CRT), Liquid crystal Display (LCD),
Light Emitting Diode (LED) display, Organic LED (OLED) display, etc. for
displaying information to a computer user. An input device [414], including
30 alphanumeric and other keys, touch screen input means, etc. may be coupled to the
bus [402] for communicating information and command selections to the processor
29

[404]. Another type of user input device may be a cursor controller [416], such as
a mouse, a trackball, or cursor direction keys, for communicating direction
information and command selections to the processor [404], and for controlling
cursor movement on the display [412]. The input device typically has two degrees
5 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.
[0095] The computing device [400] may implement the techniques described herein using customized hard-wired logic, one or more ASICs or FPGAs, firmware,
10 and/or program logic which in combination with the computing device [400] causes
or programs the computing device [400] to be a special-purpose machine. According to one embodiment, the techniques herein are performed by the computing device [400] in response to the processor [404] executing one or more sequences of one or more instructions contained in the main memory [406]. Such
15 instructions may be read into the main memory [406] from another storage medium,
such as the storage device [410]. Execution of the sequences of instructions contained in the main memory [406] causes the processor [404] to perform the process steps described herein. In alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions.
20
[0096] The computing device [400] also may include a communication interface [428] coupled to the bus [402]. The communication interface [428] provides a two-way data communication coupling to a network link [420] that is connected to a local network [422]. For example, the communication interface [428] may be an
25 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. As another example, the communication interface [428] may be a local area network (LAN) card to provide a data communication connection to a compatible LAN. Wireless links may also be implemented. In any such
30 implementation, the communication interface [428] sends and receives electrical,
30

electromagnetic, or optical signals that carry digital data streams representing various types of information.
[0097] The computing device [400] can send messages and receive data, including
5 program code, through the network(s), the network link [420] and the
communication interface 428. In the Internet example, a server [430] might transmit
a requested code for an application program through the Internet [428], the ISP
[426], the host [424], the local network [422] and the communication interface
[428]. The received code may be executed by the processor [404] as it is received,
10 and/or stored in the storage device [410], or other non-volatile storage for later
execution.
[0098] Therefore, in light of the above disclosure it is clear that the present disclosure comprises utilizing the common MMTEL services repository [209] data
15 by both the HSS [205] and a Home Location Register (HLR) [207] application to
derive, enable, or disable any supplementary services, thereby eliminating the need for a separate synchronization mechanism between the HSS [205] and the HLR [207]. In traditional systems, the HSS (Home Subscriber Server) [205] and the HLR (Home Location Register) [207] operate separately. The HSS [205] serves 4G and
20 5G networks [203], and the HLR [207] serves 2G and 3G networks. These systems
each have their own data repositories, which can lead to inconsistencies when a user moves between network types. In the proposed solution of the present disclosure, both the HSS [205] and the HLR [207] applications utilize the same common MMTEL services repository [209] data. This repository contains data about the
25 status of various supplementary services for each subscriber. When a change is
made, such as a subscriber enabling or disabling a service, this change is reflected in the MMTEL-SERVICES repository [209]. So, when a subscriber moves from a 4G/5G network [203] to a 2G network [219], the HLR [207] application can access the MMTEL-SERVICES repository [209] and retrieve the updated supplementary
30 services data. This way, the subscriber can continue using the same services without
interruption, regardless of the network they are currently on. By having both the
31

HSS [205] and the HLR [207] applications use the same common repository, this
method eliminates the need for a separate synchronization mechanism between the
HSS [205] and the HLR [207]. Previously, some sort of sync mechanism would be
needed to ensure that the HSS [205] and HLR [207] had consistent data about the
5 subscriber's services. This new method and system reduces the chance of
inconsistencies or synchronization issues. Furthermore, by using a common
repository that can be used across different network generations (2G, 4G, 5G), this
method improves the user experience by ensuring continuity of the supplementary
services. This reduces the need for vendor-specific customizations and ensures a
10 smoother, more consistent user experience as the subscriber moves between
different network types.
[0099] Also, an aspect of the present disclosure relates to a non-transitory computer readable storage medium storing executable instructions for managing one or more
15 supplementary services in a multi-network environment. The instructions when
executed by one or more units of a system, causes: a transceiver unit [211] of the system to receive one of a request to enable the one or more supplementary services and a request to disable the one or more supplementary services from a subscriber registered on a first network; a storage unit [213] of the system to store, via a home
20 subscriber server (HSS) [205], a set of changes corresponding to one of enabled one
or more supplementary services and disabled one or more supplementary services, in a common repository; a control unit [215] of the system to synchronize the stored set of changes corresponding to one of the enabled one or more supplementary services and the disabled one or more supplementary services with a Home
25 Location Register (HLR) [207]; and a registration unit [217] of the system to
register the subscriber on a second network, wherein one of the enabled one or more supplementary services the disabled one or more supplementary services on the first network are accessible for usage on the second network based on the synchronization.
30
32

[0100] Therefore, the present disclosure provides a method and system for utilizing common supplementary services data in a multi-network environment.
[0101] As would be appreciated, the approaches of the present subject matter
5 provides a number of technical advancements.
[0102] For example, the present subject matter provides a technical advancement
relating to utilization of common supplementary services data in a multi-network
environment that unify the management of supplementary services data across
10 different generations of mobile networks (2G, 4G, 5G) using a common data
repository (MMTEL-SERVICES).
[0103] Additionally, the present subject matter provides disclosure provides
approaches for utilizing common supplementary services data in a multi-network
15 environment that provide seamless service continuity for subscribers moving across
different network generations. This means that if a subscriber enables or disables any supplementary service in one network, the status of that service should remain consistent if they move to another network.
20 [0104] Further, the present disclosure provides approaches for utilizing common
supplementary services data in a multi-network environment that eliminate the need for separate synchronization mechanisms between the Home Subscriber Server (HSS) [205] and the Home Location Register (HLR) [207]. This is achieved by using the same repository of data, ensuring that changes made in one system are
25 automatically reflected in the other.
[0105] Also, the present disclosure provides approaches for utilizing common
supplementary services data in a multi-network environment that propose a
standard method of handling supplementary services across network generations.
30 This can lead to better interoperability between different vendors and make the
overall system more efficient.
33

[0106] Further, the present disclosure provides approaches for utilizing common
supplementary services data in a multi-network environment that utilizes a common
data repository for HSS [205] and HLR [207] applications, therefore, the
5 complexity associated with managing and synchronizing separate databases can be
reduced. This simplification can lead to lower maintenance costs and increased system reliability.
[0107] Also, the present disclosure provides approaches for utilizing common
10 supplementary services data in a multi-network environment that ensures
uninterrupted use of supplementary services across different network coverage.
[0108] Moreover, the disclosure provides a technically advanced solution that
enhances the user experience for mobile subscribers. For instance, the users won't
15 need to worry about the status of their services changing as they move between
different network areas.
[0109] While considerable emphasis has been placed herein on the disclosed
embodiments, it will be appreciated that many embodiments can be made and that
20 many changes can be made to the embodiments without departing from the
principles of the present disclosure. These and other changes in the embodiments
of the present disclosure will be apparent to those skilled in the art, whereby it is to
be understood that the foregoing descriptive matter to be implemented is illustrative
and non-limiting.
25
[0110] Further, in accordance with the present disclosure, it is to be acknowledged
that the functionality described for the various the components/units can be
implemented interchangeably. While specific embodiments may disclose a
particular functionality of these units for clarity, it is recognized that various
30 configurations and combinations thereof are within the scope of the disclosure. The
functionality of specific units as disclosed in the disclosure should not be construed
34

as limiting the scope of the present disclosure. Consequently, alternative arrangements and substitutions of units, provided they achieve the intended functionality described herein, are considered to be encompassed within the scope of the present disclosure.
35

We Claim:
1. A method [300] for managing one or more supplementary services in a multi-
network environment, comprising:
receiving, by a transceiver unit [211], a request to modify the one or more supplementary services from a subscriber registered on a first network;
storing, by a storage unit [213] via a home subscriber server (HSS) [205], a set of changes corresponding to modification of one or more supplementary services, in a common repository;
synchronizing, by a control unit [215], the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR) [207]; and
registering, by a registration unit [217], the subscriber on a second network, wherein one of the modified one or more supplementary services on the first network are accessible for usage on the second network based on the synchronization.
2. The method [300] as claimed in claim 1, wherein the first network is one of a 4G network and a 5G network [203].
3. The method [300] as claimed in claim 1, wherein the second network is a 2G network [219].
4. The method [300] as claimed in claim 1, wherein the common repository is a Multimedia Telephony (MMTEL) services repository [209].
5. The method [300] as claimed in claim 1, wherein the one or more supplementary services are selected from a group consisting of at least one of a call

forwarding, a call waiting, a voicemail, and a multimedia telephony (MMTEL) service.
6. A system [200a] for managing one or more supplementary services in a
multi-network environment, the system [200a] comprises:
a transceiver unit [211] configured to receive a request to modify the one or more supplementary services from a subscriber registered on a first network;
a storage unit [213] connected to at least the transceiver unit [211], the storage unit [213] is configured to store, via a home subscriber server (HSS) [205], a set of changes corresponding to modification of one or more supplementary services, in a common repository;
a control unit [215] connected to at least the storage unit [213], the control unit [215] is configured to synchronize the stored set of changes corresponding to the modification of one or more supplementary services with a Home Location Register (HLR) [207]; and
a registration unit [217] connected to at least the control unit [215], the control unit [215] is configured to register the subscriber on a second network, wherein one of the modified one or more supplementary on the first network are accessible for usage on the second network based on the synchronization.
7. The system [200a] as claimed in claim 6, wherein the first network is one of a 4G network and a 5G network [203].
8. The system [200a] as claimed in claim 6, wherein the second network is a 2G network [219].

9. The system [200a] as claimed in claim 6, wherein the common repository is a Multimedia Telephony (MMTEL) services repository [209].
10. The system [200a] as claimed in claim 6, wherein the one or more supplementary services are selected from a group consisting at least one of a call forwarding, a call waiting, a voicemail, and a multimedia telephony (MMTEL) service.