FORM 2
THE PATENTS ACT, 1970
THE PATENTS RULE 0) 003
COMPLETE SPECIFICATION
APPLICANT
JIO PLATFORMS LIMITED
of Office-101, Saffron, Nr. Centre Point, Panchwati 5 Rasta, Ambawadi, Ahmedabad - 380006, Gujarat, India; Nationality: India
The following specification particularly describes
the invention and the manner in which
it is to be performed

RESERVATION OF RIGHTS
[0001] A portion of the disclosure of this patent document contains material,
which is subject to intellectual property rights such as, but are not limited to, copyright, design, trademark, Integrated Circuit (IC) layout design, and/or trade dress protection, belonging to Jio Platforms Limited (JPL) or its affiliates (hereinafter referred as owner). The owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all rights whatsoever. All rights to such intellectual property are fully reserved by the owner.
FIELD OF DISCLOSURE
[0002] The embodiments of the present disclosure generally relate to a
communication network. In particular, the present disclosure relates to a system and method for a policy rule change in a communication network.
BACKGROUND OF DISCLOSURE
[0003] 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.
[0004] Wireless communication technology has rapidly evolved over the
past few decades. The first generation of wireless communication technology was based on analog technology that offered only voice services. Further, when the second-generation (2G) technology was introduced, text messaging and data services became possible. The 3G technology marked the introduction of high-speed internet access, mobile video calling, and location-based services. The fourth generation (4G) technology revolutionized the wireless communication with faster

data speeds, improved network coverage, and security. Currently, the fifth generation (5G) technology is being deployed, with even faster data speeds, low latency, and the ability to connect multiple devices simultaneously.
[0005] As wireless technologies are advancing, there is a need to cope with
the 5G requirements and deliver a high level of service to the subscribers.
Communications networks provide network services to numerous subscribers. With
a lot of new features provided by communication networks, the number of
subscribers accessing a network may easily reach into the millions. In order to cater
to a larger number of subscribers, a network service provider needs to have the
capability to manage the network to meet service agreements with each subscriber,
maintain security, manage network resources, and correctly charge each subscriber.
[0006] For effective network management, a set of rules needs to be
specified. The specified rules may be managed by a policy rule engine. The policy rule engine may include capabilities for handling new rules, new subscribers, modifications of rules for existing subscriber, etc.
[0007] There is, therefore, a need in the art to provide a method and a system
that can overcome the shortcomings of the existing prior arts.
OBJECTS OF THE PRESENT DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one
embodiment herein satisfies are as listed herein below.
[0009] An object of the present disclosure is to provide the policy rule
engine with the capability to remove the previously installed rules on its own if the
already installed rule's condition doesn’t match.
[0010] An object of the present disclosure is to provide exclusive flags to
enable a specific rule to be pushed to a session management function (SMF) and
ignore other rules that match the condition.
[0011] An object of the present disclosure is to provide different left terms
and operator choices for different interfaces.
[0012] An object of the present disclosure is to enable the policy control
function (PCF) not to send a remove rules command to the SMF if rules are not

installed for the subscriber, and if policy rule removal is configured in the policy
engine.
[0013] An object of the present disclosure is to provide network operators
to create new policy with action removal to avoid policy modification of existing
rule.
[0014] An object of the present disclosure is to evaluate two policies having
matching conditions.
[0015] An object of the present disclosure is to send a delta change to the
SMF when the delta changes in the dynamic rule definition.
DEFINITION
[0016] As used in the present disclosure, the following terms are generally
intended to have the meaning as set forth below, except to the extent that the context in which they are used to indicate otherwise.
[0017] The term PCF as used herein, refers to Policy Control Function. The
PCF is a key component of the 5G architecture and plays a crucial role in enforcing policy decisions related to Quality of Service (QoS), traffic management, and network resource allocation.
[0018] The term SMF as used herein, refers to Session Management
Function. The SMF plays a crucial role in establishing, managing, and terminating communication sessions between User Equipment (UE) and 5G network services.
[0019] The term AMF as used herein, refers to Access and Mobility
Management Function. The AMF is responsible for managing access to the 5G network and handling mobility-related functions for UE devices.
SUMMARY
[0020] In an exemplary embodiment, the present invention discloses a
system for changing policy rules in a communication network. The system comprises a receiving unit configured for receiving a request from a user equipment

(UE). The system comprises a database configured for storing the request. The
system comprises a processing unit coupled with the receiving unit and the database
and configured for receiving the request from the database. The processing unit is
configured for extracting a plurality of parameters associated with the received
request to generate a list of policy rules. The processing unit is configured for
provisioning a mutual exclusive flag for each policy rule in the generated list of
policy rules and pushing a policy rule to a session management function (SMF)
after determining that the provisioned mutual exclusive flag is true for the policy
rule.
[0021] In an embodiment, the system is further configured to establish an
SMF session for the policy rule on receiving the request.
[0022] In an embodiment, the plurality of parameters includes one or more
of a rule name, an assumption, and an action.
[0023] In an embodiment, the rule name and the assumption form a
condition associated with the policy rule.
[0024] In an embodiment, the action is executed when the condition is met
for the policy rule.
[0025] In an embodiment, the request includes an addition, a removal, or an
updation of a policy rule in a policy rule engine.
[0026] In an embodiment, the removal of the policy rule is communicated
from a policy control function (PCF) to the SMF when the policy rule is
successfully installed for a subscriber in the SMF session.
[0027] In an embodiment, a precedence for each policy rule in the list of
policy rules is defined by a user.
[0028] In an embodiment, the PCF is configured to remove an installed
policy rule when the condition associated with the installed policy rule is not met.
[0029] In an embodiment, the policy rule engine is configured to evaluate a
set of policies with the plurality of parameters associated with the request during
the SMF session.
[0030] In an embodiment, the policy rule engine is configured to evaluate
at least two policies having similar matching conditions.

[0031] In an exemplary embodiment, the present invention discloses a
method for changing policy rules in a communication network. The method
comprises receiving a request from a user equipment (UE). The method comprises
extracting a plurality of parameters associated with the received request to generate
a list of policy rules. The method comprises provisioning a mutual exclusive flag
for each policy rule in the generated list of policy rules and pushing a policy rule to
a session management function (SMF) after determining that the provisioned
mutual exclusive flag is true for the policy rule.
[0032] In an embodiment, the method further comprises establishing an
SMF session for the policy rule on receiving the request.
[0033] In an embodiment, the plurality of parameters includes one or more
of a rule name, an assumption, and an action.
[0034] In an embodiment, the rule name and the assumption form a
condition associated with the policy rule.
[0035] In an embodiment, the action is executed when the condition is met
for the policy rule.
[0036] In an embodiment, the request includes an addition, a removal, or an
updation of a policy rule in a policy rule engine.
[0037] In an embodiment, the removal of the policy rule is communicated
from a policy control function (PCF) to the SMF when the policy rule is
successfully installed for a subscriber in the SMF session.
[0038] In an embodiment, a precedence for each policy rule in the list of
policy rules is defined by a user.
[0039] In an embodiment, the PCF is configured to remove an installed
policy rule when the condition associated with the installed policy rule is not met.
[0040] In an embodiment, the policy rule engine is configured to evaluate a
set of policies with the plurality of parameters associated with the request during
the SMF session.
[0041] In an embodiment, the policy rule engine is configured to evaluate
at least two policies having similar matching conditions.

[0042] In an exemplary embodiment, the present invention discloses a user
equipment (UE) communicatively coupled with a communication network. The coupling comprises steps of receiving, by the communication network, a connection request from the UE, sending, by the communication network, an acknowledgment of the connection request to the UE and transmitting a plurality of signals in response to the connection request. The policy rules in the communication network are changed by a system. The system comprises a receiving unit configured for receiving a request from the UE. The system comprises a database configured for storing the request. The system comprises a processing unit coupled with the receiving unit and the database and is configured for receiving the request from the database. The processing unit is configured for extracting a plurality of parameters associated with the received request to generate a list of policy rules. The processing unit is configured for provisioning a mutual exclusive flag for each policy rule in the generated list of policy rules and pushing a policy rule to a session management function (SMF) after determining that the provisioned mutual exclusive flag is true for the policy rule.
BRIEF DESCRIPTION OF DRAWINGS
[0043] 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 the disclosure of electrical components, electronic components or circuitry commonly used to implement such components.
[0044] FIG. 1 illustrates an exemplary network architecture in which or with
which a system for changing a plurality of policy rules in a communication network is implemented, in accordance with embodiments of the present disclosure.

[0045] FIG. 2 illustrates an exemplary block diagram representation of a
system for performing policy rule change, in accordance with embodiments of the present disclosure.
[0046] FIG. 3 illustrates an architecture of a rule engine, in accordance with
5 embodiments of the present disclosure.
[0047] FIG. 4 illustrates is an illustration of a non-limiting example of
details of computing hardware used in the system, in accordance with an embodiment of the present disclosure.
[0048] FIG. 5 illustrates an exemplary flow diagram for a method for
10 changing policy rules in a communication network, in accordance with an
embodiment of the present disclosure.
[0049] The foregoing shall be more apparent from the following more
detailed description of the disclosure.
LIST OF REFERENCE NUMERALS
15 100 – Network Architecture
102 – User Equipment (UE)
104 – Access Point or gNodeB (gNB)
106 – Network
108 – Access and Mobility Management Function (AMF)
20 110 – Session Management Function (SMF)
112 – Policy Control Function (PCF)
114 – System
200 - Block diagram
202 – Receiving unit
25 204 – Memory
206 – Interfacing unit
208 – Processing unit
210 – Database
212 – Acquisition Unit
30 214 – Policy Rule Engine
8

216 – Other Engines/Units
300- Rule engine architecture
400- A computer system
410 – External Storage Device
5 420 – Bus
430 – Main Memory
440 – Read Only Memory
450 – Mass Storage Device
460 – Communication Port
10 470 – Processor
500- Flow diagram
DETAILED DESCRIPTION OF THE INVENTION
[0050] In the following description, for the purposes of explanation, various
specific details are set forth in order to provide a thorough understanding of
15 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
20 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.
25 [0051] 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
9

function and arrangement of elements without departing from the spirit and scope of the disclosure as set forth.
[0052] Specific details are given in the following description to provide a
thorough understanding of the embodiments. However, it will be understood by one
5 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
10 unnecessary detail in order to avoid obscuring the embodiments.
[0053] Also, it is noted that individual embodiments may be described as a
process that 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
15 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. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc. When a process corresponds to a function, its termination can correspond to a return of the function to the calling
20 function or the main function.
[0054] 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
25 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 like the term
30 “comprising” as an open transition word without precluding any additional or other
elements.
10

[0055] Reference throughout this specification to “one embodiment” or “an
embodiment” or “an instance” or “one instance” means that a particular feature,
structure, or characteristic described in connection with the embodiment is included
in at least one embodiment of the present disclosure. Thus, the appearances of the
5 phrases “in one embodiment” or “in an embodiment” in various places throughout
this specification are not necessarily all referring to the same embodiment.
Furthermore, the particular features, structures, or characteristics may be combined
in any suitable manner in one or more embodiments.
[0056] The terminology used herein is to describe particular embodiments
10 only and is not intended to be limiting the disclosure. As used herein, the singular
forms “a”, “an”, and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or
15 components, but do not preclude the presence or addition of one or more other
features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any combinations of one or more of the associated listed items. It should be noted that the terms “mobile device”, “user equipment”, “user device”, “communication device”, “device” and similar terms
20 are used interchangeably for the purpose of describing the invention. These terms
are not intended to limit the scope of the invention 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 invention is not limited to any particular type of device or equipment, and it should be understood that other
25 equivalent terms or variations thereof may be used interchangeably without
departing from the scope of the invention as defined herein.
[0057] 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
30 device. The user device is capable of receiving and/or transmitting one or
parameters, performing function/s, communicating with other user devices, and
11

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,
5 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
10 person skilled in the art for implementation of the features of the present disclosure.
[0058] Further, the user device may also comprise a “processor” or
“processing unit” includes processing engine, 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
15 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
20 the system according to the present disclosure. More specifically, the processor is
a hardware processor.
[0059] 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
25 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), fifth generation (5G), sixth generation (6G) and more such advanced generations are expected to continue in
30 the forthcoming time.
12

[0060] While considerable emphasis has been placed herein on the
components and component parts of the preferred embodiments, it will be
appreciated that many embodiments can be made and that many changes can be
made in the preferred embodiments without departing from the principles of the
5 disclosure. These and other changes in the preferred embodiment, as well as other
embodiments of the disclosure, will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.
10 [0061] At present, there has been a surge in users subscribing to fifth
generation (5G) network services, emphasizing the importance of delivering optimal services and a high-quality experience. As the subscription information, location, time, or other relevant parameters change on a user equipment (UE), the Policy Control Function (PCF) may need to update the policy rules to reflect these
15 changes accurately. For example, if the UE moves to a different location, the PCF
may update the policy rules to ensure optimal network performance and resource utilization based on the new location. The PCF and Session Management Function (SMF) are key components in the 5G core network. The PCF is responsible for policy control and enforcement, while the SMF manages the session establishment,
20 modification, and termination. The PCF can make rules based on the session
information provided by the SMF. These rules are defined to control and manage the policy aspects of a user’s session. However, it is a cumbersome task to amend these rules during an active session. The present disclosure simplifies the network architecture by disclosing a method and a system for changing a plurality of policy
25 rules in a communication network automatically such that policy rules can be
updated in the production environment for 5G network in order to comply with regulatory requirements.
[0062] The present disclosure relates to a PCF capable of removing
previously installed rules on its own if the already installed rules condition doesn’t
30 match. Further, in some embodiments, the rules are provisioned with mutual
exclusive flag true if a specific rule needs to be pushed to SMF and ignore other
13

rules which match the condition. If rules are not installed for the subscriber, and if policy rule removal is configured in the policy engine, PCF will not send a remove rules command to the SMF.
[0063] In some embodiments, if two policies have matching conditions, the
5 policy engine evaluates both policies. Operators can create new policies with action
removal to avoid policy modification of existing rules. In an embodiment, when a request (Rx trigger) is received, and no delta change is determined by the present system, then the system is configured to send an update notification then no update is sent towards SMF, and success response (acknowledgment) is sent to the
10 receiver. If delta change is determined by the present system, then the system is
configured to send only the delta part towards SMF.
[0064] The various embodiments throughout the disclosure will be
explained in more detail with reference to FIG. 1- FIG. 5.
[0065] FIG. 1 illustrates an exemplary network architecture in which or with
15 which a system for changing a plurality of policy rules in a communication network
is implemented, in accordance with embodiments of the present disclosure. In an embodiment, the plurality of policy rules is selected from a group consisting of media-based rules, session management (SM) policy rules, access and mobility (AM) policy rules, and application detection and control (ADC) rules.
20 [0066] For example, the system may be embedded in the policy control
function (PCF) (112). In another example, the system may be embedded in a policy rule engine (PCF server).
[0067] Referring to FIG. 1, the network architecture (100) includes a
plurality of access points or gNodeBs (gNB) (104) serving a user equipment (UEs)
25 (102). The UE (102) is connected to a system (114) through a communication
network (106).
[0068] In an embodiment, the UE (102) may be referred to as a user device
or computing device. A person of ordinary skill in the art will appreciate that the terms “user device(s),” “computing device(s),” and “UE” may be used
30 interchangeably throughout the disclosure. In an example, the user may be a
subscriber or a network operator.
14

[0069] In an embodiment, the UEs (102) may include, but are not limited
to, a handheld wireless communication device (e.g., a mobile phone, a smartphone,
a phablet device, and so on), a wearable computer device (e.g., a head-mounted
display computer device, a head-mounted camera device, a wristwatch computer
5 device, and so on), a Global Positioning System (GPS) device, a laptop computer,
a tablet computer, or another type of portable computer, a media playing device, a portable gaming system, and/or any other type of device with wireless communication capabilities, and the like. In an embodiment, the UEs (102) may include, but are not limited to, any electrical, electronic, electro-mechanical, or an
10 equipment, or a combination of one or more of the above devices such as virtual
reality (VR) devices, augmented reality (AR) devices, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, mainframe computer, or any other computing device, wherein the user device (102) may include one or more in-built or externally coupled accessories including, but not limited to, a visual
15 aid device such as camera, audio aid, a microphone, a keyboard, and input devices
for receiving input from a user such as touchpad, touch enabled screen, electronic pen, and the like.
[0070] A person of ordinary skill in the art will appreciate that the user
devices or UEs (102) may not be restricted to the mentioned devices and various
20 other devices may be used.
[0071] Referring to FIG. 1, the UEs (102) may communicate with the
system (114) through the network (106). In an embodiment, the network (106) may include at least one of a non-standalone (NSA) 5G network, a standalone 5G network, or the like. The network (106) may enable the UEs (102) to communicate
25 between devices and/or with the system (114). As such, the network (106) may
enable the UEs (102) to communicate with other UEs (102) via a wired or wireless network. The network (106) may include a wireless card or some other transceiver connection to facilitate this communication. The UE (102) may be communicatively coupled with the network (106). The communicative coupling
30 comprises receiving, from the UE (102), a connection request by the network (106),
15

sending an acknowledgment of the connection request to the UE (102), and
transmitting a plurality of signals in response to the connection request.
[0072] In an exemplary embodiment, the network (106) may incorporate
one or more of a plurality of standard or proprietary protocols including, but not
5 limited to, Wi-Fi, Zigbee, or the like. In another embodiment, the network (106)
may be implemented as, or include any of a variety of different communication technologies such as a wide area network (WAN), a local area network (LAN), a wireless network, a mobile network, a Virtual Private Network (VPN), the Internet, the Public Switched Telephone Network (PSTN), or the like.
10 [0073] Referring to FIG. 1, the network (106) may include one or more
network slices enabling the connection of the UE (102) with the system (114). The network slice may include one or more modules for enabling session establishment between the UE (102) and the system (114). The modules include an AMF (108), a SMF (110), and the PCF (112). The PCF (112) performs a policy control function.
15 [0074] The system (114) is configured to receive a request from the UE
(102). In an example, the request includes addition, removal, updation of a specific policy rule selected from the plurality of policy rules. The system (114) is configured to extract a plurality of parameters associated with the received request to generate a list of rules. For example, the plurality of parameters includes an
20 assumption part having a left term, an operator, a right term, and an action part. For
example, the left term includes values obtained from the request or fetched from a cache memory associated with the established session. In an embodiment, the system (114) is configured to add the left term values in a memory and employ forward chaining logic in which the left term and the right term are extracted,
25 parsed, and validated to take action accordingly.
[0075] The system (114) is configured to determine a mutual exclusive flag
for each rule of the generated list with a set of previously installed rules. If the determined mutual exclusive flag is true for the specific policy rule, then the system (114) is configured to push the rule to the SMF. In an aspect, the mutual exclusive
30 flag for each rule ensures that only one rule is pushed or applied at a time to the
SMF. The mutual exclusive flag for each rule prevents conflicting rules from being
16

simultaneously enforced in the SMF by ignoring the other rules having similar policy rule matching conditions.
[0076] Although FIG. 1 shows exemplary components of the network
architecture (100), in other embodiments, the network architecture (100) may
5 include fewer components, different components, differently arranged components,
or additional functional components than depicted in FIG. 1. Additionally, or alternatively, one or more components of the network architecture (100) may perform functions described as being performed by one or more other components of the network architecture (100).
10 [0077] FIG. 2 illustrates an exemplary block diagram representation (200)
of a system (114) for performing policy rule change, in accordance with embodiments of the present disclosure.
[0078] Referring to FIG. 2, the PCF system or system (114) include a
receiving unit (202), a memory (204), an interfacing unit (206), a processing unit
15 (208), and a database (210). The processing unit (208) comprises an acquisition unit
(212), a policy rule engine (214), and other units (216). The receiving unit is configured for receiving a request from UE. The database (210) is configured for storing the request. The processing unit (208) is coupled with the receiving unit (202) and the database (210) and is configured for receiving the request from the
20 database. The acquisition unit (212) is configured for extracting a plurality of
parameters associated with the received request to generate a list of policy rules. The policy rule engine (214) is configured for provisioning a mutual exclusive flag for each policy rule in the generated list of policy rules and pushing a policy rule to a session management function (SMF) after determining that the provisioned
25 mutual exclusive flag is true for the policy rule.
[0079] The processing unit (208) may be implemented as one or more
microprocessors, microcomputers, microcontrollers, edge or fog microcontrollers, digital signal processors, central processing units, logic circuitries, and/or any devices that process data based on operational instructions. Among other
30 capabilities, the processing unit (208) is configured to fetch and execute computer-
readable instructions stored in a memory (204) of the system (114). The memory
17

(204) is configured to store one or more computer-readable instructions or routines
in a non-transitory computer readable storage medium, which is fetched and
executed to create or share data packets over a network service. The memory (204)
may comprise any non-transitory storage device including, for example, volatile
5 memory such as Random-Access Memory (RAM), or non-volatile memory such as
Electrically Erasable Programmable Read-only Memory (EPROM), flash memory, and the like.
[0080] In an embodiment, the interfacing unit (206) may comprise a variety
of interfaces, for example, interfaces for data input and output devices, referred to
10 as input/output (I/O) devices, storage devices, and the like. The interfacing unit
(206) may facilitate communication for the system (114). The interfacing unit (206) may also provide a communication pathway for one or more components of the system (114). Examples of such components include, but are not limited to, the processing unit (208) and the database (210).
15 [0081] The processing unit (208) is implemented as a combination of
hardware and programming (for example, programmable instructions) to implement one or more functionalities of the processing unit (208). In examples described herein, such combinations of hardware and programming is implemented in several different ways. For example, the programming for the processing unit
20 (208) is processor-executable instructions stored on a non-transitory machine-
readable storage medium and the hardware for the processing unit (208) may comprise a processing resource (for example, one or more processors), to execute such instructions. In the present examples, the machine-readable storage medium may store instructions that, when executed by the processing resource, implement
25 the processing unit (208). In such examples, the system (114) may include the
machine-readable storage medium storing the instructions and the processing resource to execute the instructions, or the machine-readable storage medium is separate but accessible to the system (114) and the processing resource. In other examples, the processing unit (208) is implemented by electronic circuitry. In an
30 aspect, the database (210) may comprise data that is either stored or generated as a
18

result of functionalities implemented by any of the components of the processing
engine (208).
[0082] Referring to FIG. 2, the database (210) may store one or more
policies and rules associated with the communication network.
5 [0083] A person of ordinary skill in the art will appreciate that the
exemplary block diagram (200) is modular and flexible to accommodate any kind
of changes in the system (114).
[0084] In an embodiment, the system (114) is configured to establish a
session on receiving the request.
10 [0085] In an embodiment, the system (114) is configured to dismiss the
received request of removal for the specific rule if the specific rule is not installed
for a subscriber. In an aspect, the system (114) is configured to evaluate at least two
policies if the at least two policies have similar matching conditions.
[0086] In an embodiment, the system (114) is configured to employ a
15 command line interface (CLI) or a simple mail protocol (SMP).
[0087] FIG. 3 illustrates an architecture (300) of a rule engine (inference
rule engine) (policy control function (PCF) server), in accordance with
embodiments of the present disclosure.
[0088] In one embodiment, a rule engine is viewed as a sophisticated
20 interpreter of if-then statements. The if-then statements are the rules. A rule is
composed of the three parts, a rule Name, an assumption, and an action. When the
condition is met, the action is executed. The inputs to a rule engine are a collection
of rules called a rule execution set and data objects.
[0089] Referring to FIG. 3, in some embodiments, when Inference rules are
25 provisioned then the content received in provisioning request are converted into
RulePojoList (shown by step 302) which contains IfPojo and ThenPojo. IfPojo is
used for the Assumptions part and ThenPojo is used for Action part. Left Term,
Operator and Right term are set in Assumption from IfPojos, same for the method
(Rule Type) and action are set in Action from ThenPojo. Further, in an embodiment,
30 after getting rule names, assumptions, and actions from the Pojos, these are added
in RuleImplList (rule implementation list).
19

[0090] The values of the left term are either obtained from request or
sessionCachePojos and are set in working Memory of RuleInputPojo (shown by
step 304).
[0091] After adding the left Term values in working Memory, the rules are
5 executed by executing the assumptions using a Forward Chaining logic (shown by
step 306).
[0092] When a request is received, stateless session is created for the each
ruleExecutionSet (shown by step 308). Each rule execution set is executed using
Forward Chaining logic (shown by step 310).
10 [0093] In Forward Chaining, left term and right term are extracted and
parsed, as well as assumptions are validated. After the validation of assumptions,
action is taken on the basis of those validated assumptions.
[0094] Rule Execution is done, and Result set is obtained (step 312), which
is basically an array list of strings in which each string is an action part of the
15 assumption, each action can have different meaning where it can be either Policy
and Charging Control (PCC) rule name or event trigger or diameter result code and
it all depends on parsing of string in action.
[0095] In an embodiment, while provisioning Business rules, Assumptions
are sorted based on operator priority, and finally, rules are stored in the Rule Cache.
20 Sorting on operators provides an efficient way of evaluating the assumptions, e.g.,
evaluate the least expensive operator (equals to, not equals to) first only if that
Assumption evaluates to true, then move to the next Assumption; otherwise,
terminate further evaluation and return the result. Further rules can be provisioned
by CLI and SMP both. To provision rules, some conditions are needed on which
25 rules can be executed when they meet that condition. Further, there are different
parts in provision of a business rule such as a Rule name, Assumptions, and an
Action.
[0096] In an aspect, the Rule Name is a unique rule id which is given to
every rule while provisioning. The Assumption is made by a combination of Left
30 Term, operator, and Right Term. In an aspect, the Left Terms are the parameters
that are received in the request on which condition can be written. For example, the
20

left term may comprise of a type of radio access technology i.e., ‘RAT-TYPE’, and
a data network name ‘DNN’. The RAT-TYPE refers to a specific technology or
standard used for wireless communication between user devices (such as
smartphones, tablets, IoT devices) and the cellular network infrastructure. Further,
5 each RAT-TYPE represents a different generation or type of technology used for
wireless communication. The DNN refers to the name assigned to a specific data network used for identification and organizational purposes.
[0097] In an aspect, there are different types of operators used in rule
engine. The operators are added to efficiently support regulatory barring
10 requirements in the network.
[0098] In an aspect, the right term is the value part of the left term that is
used in assumptions. For example, the right term may comprise of a new radio ‘NR’ corresponding to the left term ‘RAT-TYPE’ and ‘EMERGENCY, ‘NETWIFI’, and ‘AIRFIBER’ corresponding to the left term ‘DNN’.
15 [0099] In some embodiments, action is performed after the assumptions are
evaluated and consists of a rule format, an argument list (rule type) and values. In an aspect the argument list defines as which type of Rule is to be evaluated. In an aspect, the action determines whether the rules are installed, removed, or a result code is added in it. In an aspect, the values include a value of the rule type
20 mentioned in the Argument List.
[00100] In some embodiments, implicit removal of rules are done if
conditions are not matched. For example, without limitations, the rule engine may evaluate policy during the lifetime of the SMF session with the request parameters and session information saved locally. At any point, if newly evaluated policies and
25 already installed policies set are not common, then the delta policies are
automatically sent for removal to SMF. Further, the rule engine works with
microseconds latency even with large execution sets with hundreds of rules.
[00101] In some embodiments, the rules may include mutual exclusive flag
true if a specific rule needs to be pushed to SMF and ignore other rules which match
30 the condition. Along with mutual exclusive, users can also define precedence for
each rule; when two mutual exclusive policies are evaluated, then a rule with higher
21

precedence is selected. If rules are not installed for the subscriber, and if policy rule
removal is configured in the policy engine, PCF will not send a remove rules
command to the SMF. Rules are sent for removal only if the rules are successfully
installed in SMF session.
5 [00102] In some embodiments, when two policies are evaluated and only one
is required to be sent to SMF, then the user can configure one of the policies with
rule action removed. Policy defined with action remove will not be sent to SMF.
[00103] In an embodiment, when a subsequent trigger (Rx trigger) is
received, and the same set of policies are evaluated, which are already sent to SMF,
10 then an update notification will not be sent. All attributes of dynamic rules are
compared, and if any delta is found, only then an update notification is sent to SMF
with delta changes only. Further, for ease of operation and to make the execution
fast, business rules are divided into four modules, namely Media Based Rules (Rx),
SM policy, AM policy, and ADC rules (Sd).
15 [00104] FIG. 4 is an illustration (400) of a non-limiting example of details of
computing hardware used in the system (114), in accordance with an embodiment
of the present disclosure. As shown in FIG. 4, the system (114) may include an
external storage device (410), a bus (420), a main memory (430), a read only
memory (440), a mass storage device (450), a communication port (460), and a
20 processor (470). A person skilled in the art will appreciate that the system (114)
may include more than one processor (470) and communication ports (460). Processor (470) may include various modules associated with embodiments of the present disclosure.
[00105] In an embodiment, the communication port (460) is any of an RS-
25 232 port for use with a modem-based dialup connection, a 10/100 Ethernet port, a
Gigabit or 10 Gigabit port using copper or fiber, a serial port, a parallel port, or
other existing or future ports. The communication port (460) is chosen depending
on a network, such a Local Area Network (LAN), Wide Area Network (WAN), or
any network to which the system (114) connects.
30 [00106] In an embodiment, the memory (430) is Random Access Memory
(RAM), or any other dynamic storage device commonly known in the art. Read-
22

only memory (440) is any static storage device(s) e.g., but not limited to, a
Programmable Read Only Memory (PROM) chips for storing static information
e.g., start-up or Basic Input/Output System (BIOS) instructions for the processor
(470).
5 [00107] In an embodiment, the mass storage (450) is any current or future
mass storage solution, which is used to store information and/or instructions. Exemplary mass storage solutions include, but are not limited to, Parallel Advanced Technology Attachment (PATA) or Serial Advanced Technology Attachment (SATA) hard disk drives or solid-state drives (internal or external, e.g., having
10 Universal Serial Bus (USB) and/or Firewire interfaces), one or more optical discs,
Redundant Array of Independent Disks (RAID) storage, e.g., an array of disks (e.g., SATA arrays).
[00108] In an embodiment, the bus (420) communicatively couples the
processor(s) (470) with the other memory, storage, and communication blocks. The
15 bus (420) is, e.g., a Peripheral Component Interconnect (PCI)/PCI Extended (PCI-
X) bus, Small Computer System Interface (SCSI), Universal Serial Bus (USB) or the like, for connecting expansion cards, drives and other subsystems as well as other buses, such a front side bus (FSB), which connects the processor (470) to the computer system (400).
20 [00109] Optionally, operator and administrative interfaces, e.g., a display,
keyboard, joystick, and a cursor control device, may also be coupled to the bus (420) to support direct operator interaction with the computer system (400). Other operator and administrative interfaces are provided through network connections connected through the communication port (460). Components described above are
25 meant only to exemplify various possibilities. In no way should the aforementioned
exemplary illustration (400) limit the scope of the present disclosure.
[00110] FIG. 5 illustrates an exemplary flow diagram for a method (500) for
changing policy rules in a communication network (106).
[00111] At step 502, the method (500) comprises receiving a request from a
30 user equipment (UE) (102).
23

[00112] At step 504, the method (500) comprises extracting a plurality of
parameters associated with the received request to generate a list of policy rules.
[00113] At step 506, the method (500) comprises provisioning of a mutual
exclusive flag for each policy rule in the generated list of policy rules.
5 [00114] At step 508, the method (500) comprising pushing a policy rule to a
session management function (SMF) (110) after determining that the provisioned mutual exclusive flag is true for the policy rule.
[00115] In an exemplary embodiment, the present invention discloses a
system (114) for changing policy rules in a communication network (106). The
10 system (114) comprises a receiving unit (202) configured for receiving a request
from a user equipment (UE) (102). The system (114) comprising a database (210) configured for storing the request. The system (114) comprises a processing unit (208) coupled with the receiving unit (202) and the database (210) and is configured for receiving the request from the database (210). The processing unit (208) is
15 configured for extracting a plurality of parameters associated with the received
request to generate a list of policy rules. The processing unit (208) is configured for provisioning a mutual exclusive flag for each policy rule in the generated list of policy rules and pushing a policy rule to a session management function (SMF) (110) after determining that the provisioned mutual exclusive flag is true for the
20 policy rule.
[00116] In an embodiment, the system (114) is further configured to establish
an SMF session for the policy rule on receiving the request.
[00117] In an embodiment, the plurality of parameters includes one or more
of a rule name, an assumption, and an action.
25 [00118] In an embodiment, the rule name and the assumption forms a
condition associated with the policy rule.
[00119] In an embodiment, the action is executed when the condition is met
for the policy rule.
[00120] In an embodiment, the request includes an addition, a removal, or an
30 updation of a policy rule in a policy rule engine (214).
24

[00121] In an embodiment, the removal of the policy rule is communicated
from a policy control function (PCF) (112) to the SMF (110) when the policy rule
is successfully installed for a subscriber in the SMF session.
[00122] In an embodiment, a precedence for each policy rule in the list of
5 policy rules is defined by a user.
[00123] In an embodiment, the PCF (112) is configured to remove an
installed policy rule when the condition associated with the installed policy rule is
not met.
[00124] In an embodiment, the policy rule engine (214) is configured to
10 evaluate a set of policies with the plurality of parameters associated with the request
during the SMF session.
[00125] In an embodiment, the policy rule engine (214) is configured to
evaluate at least two policies having similar matching conditions.
[00126] In an exemplary embodiment, the present invention discloses a
15 method for changing policy rules in a communication network (106). The method
comprises receiving a request from a user equipment (UE) (102). The method
comprises extracting a plurality of parameters associated with the received request
to generate a list of policy rules. The method comprises provisioning a mutual
exclusive flag for each policy rule in the generated list of policy rules and pushing
20 a policy rule to a session management function (SMF) (110) after determining that
the provisioned mutual exclusive flag is true for the policy rule.
[00127] In an embodiment, the method further comprising establishing a
SMF session for the policy rule on receiving the request.
[00128] In an embodiment, the plurality of parameters includes one or more
25 of a rule name, an assumption, and an action.
[00129] In an embodiment, the rule name and the assumption forms a
condition associated with the policy rule.
[00130] In an embodiment, the action is executed when the condition is met
for the policy rule.
30 [00131] In an embodiment, the request includes an addition, a removal, or an
updation of a policy rule in a policy rule engine (214).
25

[00132] In an embodiment, the removal of the policy rule is communicated
from a policy control function (PCF) (112) to the SMF (110) when the policy rule is successfully installed for a subscriber in the SMF session.
[00133] In an embodiment, a precedence for each policy rule in the list of
5 policy rules is defined by a user.
[00134] In an embodiment, the PCF (112) is configured to remove an
installed policy rule when the condition associated with the installed policy rule is
not met.
[00135] In an embodiment, the policy rule engine (214) is configured to
10 evaluate a set of policies with the plurality of parameters associated with the request
during the SMF session.
[00136] In an embodiment, the policy rule engine (214) is configured to
evaluate at least two policies having similar matching conditions.
[00137] In an exemplary embodiment, the present invention discloses a user
15 equipment (UE) (102) communicatively coupled with a communication network
(106). The coupling comprises steps of receiving, by the communication network (106), a connection request from the UE (102), sending, by the communication network (106), an acknowledgment of the connection request to the UE (102) and transmitting a plurality of signals in response to the connection request. The policy
20 rules in the communication network (106) are changed by a system (114). The
system (114) comprises a receiving unit (202) configured for receiving a request from the UE (102). The system (114) comprises a database (210) configured for storing the request. The system (114) comprises a processing unit (208) coupled with the receiving unit (202) and the database (210) and is configured for receiving
25 the request from the database (210). The processing unit (208) is configured for
extracting a plurality of parameters associated with the received request to generate a list of policy rules. The processing unit (208) is configured for provisioning a mutual exclusive flag for each policy rule in the generated list of policy rules and pushing a policy rule to a session management function (SMF) (110) after
30 determining that the provisioned mutual exclusive flag is true for the policy rule.
26

[00138] The present disclosure is configured to provide a system and a
method for policy rule change in a communication network. Consider a 5G user
who is streaming high-definition video content on a mobile device. The goal is to
provide an optimal streaming experience while efficiently managing network
5 resources. The PCF comes into play to define policies for the user's session. In this
case, the PCF identifies that the user is engaged in an eMBB service (high-definition video streaming) and sets policies accordingly. As the user moves through different network areas or encounters varying levels of congestion, the PCF continually adapts policies in real time. This could involve adjusting the QoS parameters,
10 applying traffic shaping, or even providing priority access during peak usage times.
The PCF is also responsible for enforcing charging and billing policies. It ensures that the user is appropriately billed for the consumed resources during the streaming session. When the user finishes streaming, the SMF handles the termination of the session, and the PCF adjusts policies accordingly. The present disclosure is
15 configured to enhance the functionalities of PCF by changing policy rules on its
own. The present system provides a seamless and optimized experience for a specific 5G service. The dynamic nature of 5G networks, coupled with the capabilities of PCF and SMF, allows for intelligent and real-time adaptation to varying conditions, ensuring efficient resource utilization and a high-quality user
20 experience. The system is placed within a 5G communication network or with
various network elements that may involve various algorithms, protocols, or
mechanisms to enhance the efficiency and reliability of triggering events, ensuring
a smoother operation of user equipment and network elements in 5G networks.
[00139] The method and system of the present disclosure may be
25 implemented in a number of ways. For example, the methods and systems of the
present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless
30 specifically stated otherwise. Further, in some embodiments, the present disclosure
may also be embodied as programs recorded in a recording medium, the programs
27

including machine-readable instructions for implementing the methods according
to the present disclosure. Thus, the present disclosure also covers a recording
medium storing a program for executing the method according to the present
disclosure.
5 [00140] While the foregoing describes various embodiments of the present
disclosure, other and further embodiments of the present disclosure may be devised
without departing from the basic scope thereof. The scope of the present disclosure
is determined by the claims that follow. The present disclosure is not limited to the
described embodiments, versions, or examples, which are included to enable a
10 person having ordinary skill in the art to make and use the present disclosure when
combined with information and knowledge available to the person having ordinary skill in the art.
ADVANTAGES OF THE PRESENT DISCLOSURE
[00141] The present disclosure provides a policy rule engine with a capability
15 to remove the previously installed rules on its own, if already installed rules
condition doesn’t match.
[00142] The present disclosure provides exclusive flags to rule to enable a
specific rule to be pushed to a session management function (SMF) and ignore other
rules which match the condition.
20 [00143] The present disclosure provides different left terms and operator
choices for different interfaces.
[00144] The present disclosure provides policy control function (PCF) to
selectively send rules to the SMF.
[00145] The present disclosure enables network operators to create new
25 policy with action removal to avoid policy modification of existing rule.
28

WE CLAIM:
1. A system (114) for changing policy rules in a communication network
(106), the system (114) comprising:
a receiving unit (202) configured for receiving a request from a user equipment (UE) (102);
a database (210) configured for storing the request;
a processing unit (208) coupled with the receiving unit (202) and the database (210) and configured for receiving the request from the database (210);
the processing unit (208) is configured for:
extracting a plurality of parameters associated with the received request to generate a list of policy rules;
provisioning a mutual exclusive flag for each policy rule in the generated list of policy rules; and
pushing a policy rule to a session management function (SMF) (110) after determining that the provisioned mutual exclusive flag is true for the policy rule.
2. The system (114) as claimed in claim 1, further configured to establish a SMF session for the policy rule on receiving the request.
3. The system (114) as claimed in claim 1, wherein the plurality of parameters includes one or more of a rule name, an assumption, and an action.
4. The system (114) as claimed in claim 3, wherein the rule name and the assumption form a condition associated with the policy rule.
5. The system (114) as claimed in claim 4, wherein the action is executed when the condition is met for the policy rule.

6. The system (114) as claimed in claim 2, wherein the request includes an addition, a removal, or an updation of a policy rule in a policy rule engine (214).
7. The system (114) as claimed in claim 6, wherein the removal of the policy rule is communicated from a policy control function (PCF) (112) to the SMF (110) when the policy rule is successfully installed for a subscriber in the SMF session.
8. The system (114) as claimed in claim 1, wherein a precedence for each policy rule in the list of policy rules is defined by a user.
9. The system (114) as claimed in claim 7, wherein the PCF (112) is configured to remove an installed policy rule when the condition associated with the installed policy rule is not met, wherein the condition associated with the policy rule is formed based on the rule name and the assumption.
10. The system (114) as claimed in claim 6, wherein the policy rule engine (214) is configured to evaluate a set of policies with the plurality of parameters associated with the request during the SMF session.
11. The system (114) as claimed in claim 10, wherein the policy rule engine (214) is configured to evaluate at least two policies having similar matching conditions.
12. A method (500) for changing policy rules in a communication network (106), the method (500) comprising:
receiving (502) a request from a user equipment (UE) (102);
extracting (504) a plurality of parameters associated with the received request to generate a list of policy rules;
provisioning (506) a mutual exclusive flag for each policy rule in the generated list of policy rules; and

pushing (508) a policy rule to a session management function (SMF) (110) after determining that the provisioned mutual exclusive flag is true for the policy rule.
13. The method (500) as claimed in claim 12, further comprising establishing a SMF session for the policy rule on receiving the request.
14. The method (500) as claimed in claim 12, wherein the plurality of parameters includes one or more of a rule name, an assumption, and an action.
15. The method (500) as claimed in claim 14, wherein the rule name and the assumption form a condition associated with the policy rule.
16. The method (500) as claimed in claim 15, wherein the action is executed when the condition is met for the policy rule.
17. The method (500) as claimed in claim 13, wherein the request includes an addition, a removal, or an updation of a policy rule in a policy rule engine (214).
18. The method (500) as claimed in claim 17, wherein the removal of the policy rule is communicated from a policy control function (PCF) (112) to the SMF (110) when the policy rule is successfully installed for a subscriber in the SMF session.
19. The method (500) as claimed in claim 12, wherein a precedence for each policy rule in the list of policy rules is defined by a user.
20. The method (500) as claimed in claim 18, wherein the PCF (112) is configured to remove an installed policy rule when the condition associated

with the installed policy rule is not met, wherein the condition associated with the policy rule is formed based on the rule name and the assumption.
21. The method (500) as claimed in claim 17, wherein the policy rule engine (214) is configured to evaluate a set of policies with the plurality of parameters associated with the request during the SMF session.
22. The method (500) as claimed in claim 17, wherein the policy rule engine (214) is configured to evaluate at least two policies having similar matching conditions.
23. A user equipment (UE) (102) communicatively coupled with a communication network (106), the coupling comprises steps of:
receiving, by the communication network (106), a connection request from the UE (102);
sending, by the communication network (106), an acknowledgment of the connection request to the UE (102); and
transmitting a plurality of signals in response to the connection request, wherein policy rules in the communication network (106) is changed by a system (114) as claimed in claim 1.