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

METHOD AND SYSTEM FOR MANAGING DYNAMIC HOST CONFIGURATION PROTOCOL (DHCP) SESSIONS IN A WIRELESS
NETWORK
FIELD OF THE DISCLOSURE
[0001] Embodiment of the present disclosure generally relates to the wireless network management system. Particularly, the present disclosure relates to Dynamic Host Configuration Protocol (DHCP) in the wireless network management system. More particularly, the embodiment of the present disclosure relates to a method and a system for managing the DHCP session in a wireless network.
BACKGROUND
[0002] The following description of the related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain aspects of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section is used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of the prior art.
[0003] Wireless communication technology has rapidly evolved over the past few decades, with each generation bringing significant improvements and advancements. The first generation of wireless communication technology was based on analog technology and offered only voice services. However, with the advent of the second generation (2G) technology, digital communication and data services became possible, and text messaging was introduced. The third generation (3G) technology marked the introduction of high-speed internet access, mobile video calling, and location-based services. The fourth generation (4G) technology revolutionized wireless communication with faster data speeds, better network

coverage, and improved security. Currently, the fifth generation (5G) technology is being deployed, promising even faster data speeds, low latency, and the ability to connect multiple devices simultaneously. With each generation, wireless communication technology has become more advanced, sophisticated, and capable of delivering more services to its users.
[0004] Further, Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to dynamically and automatically assign an Internet Protocol (IP) address and other network configuration parameters to any device such as, but not limited to, computer, smart phones, printers, etc. on a network. Instead of requiring a network administrator for manually assigning the IP address to any device, the DHCP allows devices (i.e., DHCP client) to connect to the network automatically and receive all necessary information, like the IP address, a subnet mask, a default gateway, and a Domain Name System (DNS) server address, automatically from a DHCP server. Also, the DHCP is a client-server protocol in which servers (i.e., the DHCP servers) manage a pool of unique IP addresses as well as information about client (i.e., the DHCP client) configuration parameters. Moreover, different versions of the DHCP are available for use in Internet Protocol version 4 (IPv4) and IPv6. The IPv4 is the first version of the IP as a standalone specification, whereas the IPv6 is the most recent version of the IP, the communication protocol and that provides an identification and location system for computers on networks and routes traffic across the Internet. A DHCPv4 is a network protocol for configuring IPv4 host with IP address and other configuration parameters to operate in the IPv4 network. However, a DHCPv6 is a network protocol for configuring IPv4 host with IP address and other configuration parameters to operate in the IPv6 network. Also, the IPv6 is operating as an industry standard.
[0005] Currently, in the DHCPv4/DHCPv6 there is no method available for the DHCP server to inform a DHCP client regarding the removal or deletion of a session from the core network. Further, if the DHCP client is interacting on the network

using the DHCP server and the DHCP client’s session is deleted/removed from the core network, there is no way to inform the DHCP client about the deletion/removal of the session from the DHCP server. Further, if the DHCP client uses the currently assigned IP address for accessing service, the network would drop the data packets as no session is available in the network. Furthermore, in the existing solution till the time the DHCP client tries to renew its assigned IP address using DHCPv4/DHCPv6 Request message, the DHCP server/relay would not be able to inform the DHCP client about the session deletion incident. Thereby resulting in the increase in the session outage time.
[0006] Hence, in view of these and other existing limitations, there arises an imperative need to provide an efficient solution to overcome the above-mentioned and other limitations and to provide a method and a system for managing the DHCP session in a wireless network.
SUMMARY
[0007] 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.
[0008] An aspect of the present disclosure may relate to a method for managing the DHCP session in a wireless network. The method comprising detecting, by a detecting unit at a network, a session release of a DHCP client. The method further comprising transmitting, by a transceiver unit at the network, a DHCP reconfigure request to the DHCP client upon session release detection. Also, the method comprising receiving, by the transceiver unit at the network, a DHCP renew request from the DHCP client in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client. Further, the method comprising transmitting, by the transceiver

unit at the network, a negative response message to the DHCP client based on receipt of the DHCP renew request. Furthermore, the method comprising receiving, by the transceiver unit at the network, at least one of a DHCP discover message and a solicit message from the DHCP client to request a new IP address assignment.
[0009] In an exemplary aspect of the present disclosure, the network comprises at least one of a DHCP server and DHCP relay.
[0010] In an exemplary aspect of the present disclosure, the method further comprises transmitting, by the transceiver unit at the network, an acknowledgement to the DHCP client for the received at least one of the discover message or the solicit message from the DHCP client.
[0011] In an exemplary aspect of the present disclosure, the DHCP client releases the assigned IP address on receiving the negative response message from the network.
[0012] Another aspect of the present disclosure may relate to a system for managing a dynamic host configuration protocol (DHCP) session in a network. The system comprises the network. The network may further comprise a detecting unit configured to detect, a session release of a DHCP client. Further the system comprises a transceiver unit connected to the detection unit. The transceiver unit is configured to transmit a DHCP reconfigure request to the DHCP client upon session release detection. The transceiver unit is further configured to receive a DHCP renew request from the DHCP client in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client. Further, the transceiver unit is configured to transmit a negative response message to the DHCP client based on receipt of the DHCP renew request. Furthermore, the transceiver unit is configured to receive at least one of a DHCP discover message and a solicit message from the DHCP client to request a new IP address assignment.

[0013] Yet another aspect of the present disclosure may relate to a non-transitory computer readable storage medium storing one or more instructions for managing a dynamic host configuration protocol (DHCP) session in a network, the instructions include executable code which, when executed by one or more units of a system, causes a detecting unit of the system to detect a session release of a DHCP client. Further, the executable code which, when executed by one or more units of a system, causes a transceiver unit of the system to transmit a DHCP reconfigure request to the DHCP client upon session release detection. Further, the executable code which, when executed by one or more units of a system, causes a transceiver unit of the system to receive a DHCP renew request from the DHCP client in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client. Furthermore, the executable code which, when executed by one or more units of a system, causes a transceiver unit of the system to transmit a negative response message to the DHCP client based on receipt of the DHCP renew request. Moreover, the executable code which, when executed by one or more units of a system, causes a transceiver unit of the system to receive at least one of a DHCP discover message and a solicit message from the DHCP client to request a new IP address assignment.
OBJECT OF THE DISCLOSURE
[0014] Some of the objects of the present disclosure, which at least one embodiment disclosed herein satisfies are listed herein below.
[0015] It is an object of the present disclosure to provide a system and a method for managing a dynamic host configuration protocol (DHCP) session in a network.
[0016] It is an object of the present disclosure to provide a solution to minimize the session outage time, tends to zero.

[0017] It is also an object of the present disclosure to provide a solution that can inform the DHCP client about its session deletion in the network immediately.
[0018] It is another object of the present disclosure to provide a solution that can enable the DHCP Relay/Server to inform the DHCP client about its session deletion in the network.
[0019] It is yet another object of the present disclosure to provide a solution that can minimize a session outage time in both the DHCPv4 and DHCPv6 scenarios.
DESCRIPTION OF THE DRAWINGS
[0020] 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. Also, the embodiments shown in the figures are not to be construed as limiting the disclosure, but the possible variants of the method and system according to the disclosure are illustrated herein to highlight the advantages of the disclosure. It will be appreciated by those skilled in the art that disclosure of such drawings includes disclosure of electrical components or circuitry commonly used to implement such components.
[0021] FIG. 1 illustrates an exemplary block diagram representation of 5th generation core (5GC) network architecture, in accordance with exemplary implementation of the present disclosure.

[0022] FIG. 2 illustrates an exemplary block diagram of a computing device upon which the features of the present disclosure may be implemented, in accordance with exemplary implementation of the present disclosure.
[0023] FIG. 3 illustrates an exemplary block diagram of a system for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with exemplary implementation of the present disclosure.
[0024] FIG. 4A illustrates an interactive environment for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with an exemplary embodiment of the present disclosure.
[0025] FIG. 4B illustrates an interactive environment for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with another exemplary embodiment of the present disclosure.
[0026] FIG. 5 illustrates an exemplary method flow diagram for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with exemplary implementation of the present disclosure.
[0027] FIG. 6 illustrates an exemplary signalling flow depicting a process for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with exemplary embodiments of the present disclosure.
DETAILED DESCRIPTION
[0028] 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 may 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.
5 [0029] 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
10 arrangement of elements without departing from the spirit and scope of the
disclosure as set forth.
[0030] Specific details are given in the following description to provide a thorough
understanding of the embodiments. However, it will be understood by one of
15 ordinary skill in the art that the embodiments may be practiced without these
specific details. For example, circuits, systems, processes, and other components may be shown as components in block diagram form in order not to obscure the embodiments in unnecessary detail.
20 [0031] 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 may be performed in parallel or concurrently. In addition, the order of the operations may be re-arranged. A process
25 is terminated when its operations are completed but could have additional steps not
included in a figure.
[0032] The word “exemplary” and/or “demonstrative” is used herein to mean
serving as an example, instance, or illustration. For the avoidance of doubt, the
30 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
9

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
5 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.
[0033] As used herein, a “processing unit” or “processor” or “operating processor”
10 includes one or more processors, wherein processor refers to any logic circuitry for
processing instructions. A 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 Digital Signal Processing (DSP) core, a controller, a microcontroller, Application Specific
15 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 or processing unit is a hardware processor.
20
[0034] As used herein, “a user equipment”, “a user device”, “a smart-user-device”, “a smart-device”, “an electronic device”, “a mobile device”, “a handheld device”, “a wireless communication device”, “a mobile communication device”, “a communication device” may be any electrical, electronic and/or computing device
25 or equipment, capable of implementing the features of the present disclosure. The
user equipment/device may include, but is not limited to, a mobile phone, smart phone, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, wearable device or any other computing device which is capable of implementing the features of the present disclosure. Also, the user device may
30 contain at least one input means configured to receive an input from unit(s) which
are required to implement the features of the present disclosure.
10

[0035] As used herein, “storage unit” or “memory unit” refers to a machine or
computer-readable medium including any mechanism for storing information in a
form readable by a computer or similar machine. For example, a computer-readable
5 medium includes read-only memory (“ROM”), random access memory (“RAM”),
magnetic disk storage media, optical storage media, flash memory devices or other types of machine-accessible storage media. The storage unit stores at least the data that may be required by one or more units of the system to perform their respective functions.
10
[0036] As used herein “interface” or “user interface refers to a shared boundary across which two or more separate components of a system exchange information or data. The interface may also be referred to a set of rules or protocols that define communication or interaction of one or more modules or one or more units with
15 each other, which also includes the methods, functions, or procedures that may be
called.
[0037] All modules, units, components used herein, unless explicitly excluded herein, may be software modules or hardware processors, the processors being a
20 general-purpose processor, a special purpose processor, a conventional processor, a
digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASIC), Field Programmable Gate Array circuits (FPGA), any other type of integrated circuits, etc.
25
[0038] As used herein the transceiver unit include at least one receiver and at least one transmitter configured respectively for receiving and transmitting data, signals, information or a combination thereof between units/components within the system and/or connected with the system.
30
11

[0039] As discussed in the background section, there is no method to inform a
DHCP client about the deletion/removal of the session form the network. Also, if
the DHCP client uses the currently assigned IP address for accessing service, the
network would drop the data packets as no session is available in the network.
5 Further, till the time the DHCP client tries to renew its assigned IP address using
DHCPv4/DHCPv6 Request message, the DHCP server/relay would not be able to inform the DHCP client about the session deletion incident resulting in the increased session outage time.
10 [0040] The present disclosure aims to overcome the above-mentioned and other
existing problems in this field of technology by providing method and system for managing a dynamic host configuration protocol (DHCP) session in a network. More particularly the present disclosure provides solution that can inform the DHCP client about its session deletion in the network immediately. Further, the
15 present disclosure provides a solution to enable the DHCP Relay/Server to inform
the DHCP client about deletion of the session from the network. Thus, minimizing the session outage time, i.e., tending the session outage time to zero, in both the DHCPv4 and DHCPv6 scenarios.
20 [0041] Hereinafter, exemplary embodiments of the present disclosure will be
described with reference to the accompanying drawings.
[0042] Referring to FIG. 1 an exemplary block diagram representation of 5th generation core (5GC) network architecture [100], in accordance with exemplary
25 implementation of the present disclosure is shown. As shown in FIG. 1, the 5GC
network architecture [100] includes a user equipment (UE) [102], a radio access network (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
30 Specific Authentication and Authorization Function (NSSAAF) [114], a Network
Slice Selection Function (NSSF) [116], a Network Exposure Function (NEF) [118],
12

a Network Repository Function (NRF) [120], a Policy Control Function (PCF)
[122], a Unified Data Management (UDM) [124], an application function (AF)
[126], a User Plane Function (UPF) [128], a data network (DN) [130], wherein all
the components are assumed to be connected to each other in a manner as obvious
5 to the person skilled in the art for implementing features of the present disclosure.
[0043] The 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).
10 It consists of radio base stations and the radio access technologies that enable
wireless communication.
[0044] The Access and Mobility Management Function (AMF) [106] is a 5G core
network function responsible for managing access and mobility aspects, such as UE
15 registration, connection, and reachability. It also handles mobility management
procedures like handovers and paging.
[0045] The Session Management Function (SMF) [108] is a 5G core network
function responsible for managing session-related aspects, such as establishing,
20 modifying, and releasing sessions. It coordinates with the User Plane Function
(UPF) for data forwarding and handles IP address allocation and QoS enforcement.
[0046] The Service Communication Proxy (SCP) [110] is a network function in the
5G core network that facilitates communication between other network functions
25 by providing a secure and efficient messaging service. It acts as a mediator for
service-based interfaces.
[0047] The Authentication Server Function (AUSF) [112] is a network function in
the 5G core responsible for authenticating UEs during registration and providing
30 security services. It generates and verifies authentication vectors and tokens.
13

[0048] The 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. 5
[0049] The 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.
10 [0050] The Network Exposure Function (NEF) [118] is a network function that
exposes capabilities and services of the 5G network to external applications, enabling integration with third-party services and applications.
[0051] The Network Repository Function (NRF) [120] is a network function that
15 acts as a central repository for information about available network functions and
services. It facilitates the discovery and dynamic registration of network functions.
[0052] The Policy Control Function (PCF) [122] is a network function responsible
for policy control decisions, such as QoS, charging, and access control, based on
20 subscriber information and network policies.
[0053] The Unified Data Management (UDM) [124] is a network function that centralizes the management of subscriber data, including authentication, authorization, and subscription information. 25
[0054] The Application Function (AF) [126] is a network function that represents external applications interfacing with the 5G core network to access network capabilities and services.
14

[0055] The User Plane Function (UPF) [128] is a network function responsible for handling user data traffic, including packet routing, forwarding, and QoS enforcement.
5 [0056] The 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.
10 [0057] Referring to FIG. 2, an exemplary block diagram of a computing device
[200] upon which the features of the present disclosure may be implemented in accordance with exemplary implementation of the present disclosure is shown. In an implementation, the computing device [200] may implement a method for managing a dynamic host configuration protocol (DHCP) session in a network by
15 utilising a system [300]. In another implementation, the computing device [200]
itself implements the method for managing a dynamic host configuration protocol (DHCP) session in a network using one or more units configured within the computing device [200], wherein said one or more units are capable of implementing the features as disclosed in the present disclosure.
20
[0058] The computing device [200] may include a bus [202] or other communication mechanism for communicating information, and a hardware processor [204] coupled with bus [202] for processing information. The hardware processor [204] may be, for example, a general-purpose microprocessor. The
25 computing device [200] may also include a main memory [206], such as a random-
access memory (RAM), or other dynamic storage device, coupled to the bus [202] for storing information and instructions to be executed by the processor [204]. The main memory [206] also may be used for storing temporary variables or other intermediate information during execution of the instructions to be executed by the
30 processor [204]. Such instructions, when stored in non-transitory storage media
accessible to the processor [204], render the computing device [200] into a special-
15

purpose machine that is customized to perform the operations specified in the instructions. The computing device [200] further includes a read only memory (ROM) [208] or other static storage device coupled to the bus [202] for storing static information and instructions for the processor [204]. 5
[0059] A storage device [210], such as a magnetic disk, optical disk, or solid-state drive is provided and coupled to the bus [202] for storing information and instructions. The computing device [200] may be coupled via the bus [202] to a display [212], such as a cathode ray tube (CRT), Liquid crystal Display (LCD),
10 Light Emitting Diode (LED) display, Organic LED (OLED) display, etc. for
displaying information to a computer user. An input device [214], including alphanumeric and other keys, touch screen input means, etc. may be coupled to the bus [202] for communicating information and command selections to the processor [204]. Another type of user input device may be a cursor controller [216], such as a
15 mouse, a trackball, or cursor direction keys, for communicating direction
information and command selections to the processor [204], and for controlling cursor movement on the display [212]. The input device typically has two degrees of freedom in two axes, a first axis (e.g., x) and a second axis (e.g., y), that allow the device to specify positions in a plane.
20
[0060] The computing device [200] may implement the techniques described herein using customized hard-wired logic, one or more ASICs or FPGAs, firmware and/or program logic which in combination with the computing device [200] causes or programs the computing device [200] to be a special-purpose machine.
25 According to one implementation, the techniques herein are performed by the
computing device [200] in response to the processor [204] executing one or more sequences of one or more instructions contained in the main memory [206]. Such instructions may be read into the main memory [206] from another storage medium, such as the storage device [210]. Execution of the sequences of instructions
30 contained in the main memory [206] causes the processor [204] to perform the
process steps described herein. In alternative implementations of the present
16

disclosure, hard-wired circuitry may be used in place of or in combination with software instructions.
[0061] The computing device [200] also may include a communication interface
5 [218] coupled to the bus [202]. The communication interface [218] provides a two-
way data communication coupling to a network link [220] that is connected to a local network [222]. For example, the communication interface [218] may be an integrated services digital network (ISDN) card, cable modem, satellite modem, or a modem to provide a data communication connection to a corresponding type of
10 telephone line. As another example, the communication interface [218] 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 implementation, the communication interface [218] sends and receives electrical, electromagnetic or optical signals that carry digital data streams representing
15 various types of information.
[0062] The computing device [200] can send messages and receive data, including program code, through the network(s), the network link [220] and the communication interface [218]. In the Internet example, a server [230] might
20 transmit a requested code for an application program through the Internet [228], the
ISP [226], a host [224], the local network [222] and the communication interface [218]. The received code may be executed by the processor [204] as it is received, and/or stored in the storage device [210], or other non-volatile storage for later execution.
25
[0063] Referring to FIG. 3, an exemplary block diagram of a system [300] for managing a dynamic host configuration protocol (DHCP) session in a network, in accordance with exemplary implementation of the present disclosure is shown. The system [300] comprises at least one detection unit [302] and at least one transceiver
30 unit [304]. Also, all of the components/ units of the system [300] are assumed to be
connected to each other unless otherwise indicated below. As shown in the figures
17

all units shown within the system should also be assumed to be connected to each
other. Also, in FIG. 3 only a few units are shown, however, the system [300] may
comprise multiple such units or the system [300] may comprise any such numbers
of said units, as required to implement the features of the present disclosure.
5 Further, in an implementation, the system [300] may reside in a server or the
network entity or the system [300] may be in communication with the network entity to implement the features as disclosed in the present disclosure.
[0064] The system [300] is configured for managing the dynamic host
10 configuration protocol (DHCP) session in the network [402] with the help of the
interconnection between the components/units of the system [300]. In general, DHCP is a client-server protocol in which a DHCP server manages a pool of unique Internet Protocol (IP) addresses, as well as information about client configuration parameters. The pool of unique IP addresses is pool or container of IP addresses
15 possessed by each DHCP server from the set of DHCP servers. The pool has a range
of IP addresses that may be allocated to a DHCP client from the set of DHCP clients. Further, the DHCP session encompasses numerous components such as but not limited to a set of DHCP servers, a set of DHCP clients and a set of DHCP relays. Furthermore, each DHCP server from the set of DHCP servers may be a networked
20 device that runs on a DHCP service. The DHCP server from the set of DHCP servers
manages and holds the pool of unique IP addresses and other configuration parameters related to each DHCP client from the set of DHCP clients. Each DHCP client from the set of DHCP clients is a device such as, but not limited to, a computer, a smart phone etc. that connects to the network and communicates with
25 the DHCP server from the set of DHCP server. Further, each DHCP relay from the
set of DHCP relays manages one or more requests between the DHCP server from the set of servers and the DHCP client from the set of DHCP clients. Moreover, the DHCP is the network management protocol used to dynamically and automatically assign an IP address to the DHCP client from the pool of unique IP addresses in the
30 DHCP server. Moreover, the network also comprises at least one of a DHCP server
18

and a DHCP relay (explained further in the detailed description of FIG. 4a and FIG 4b).
[0065] Further, the system [300] comprises the detection unit [302]. The detection
5 unit [302] is associated with the network. The detection unit [302] is configured to
detect a session release of a DHCP client [404] (further explained in the detailed description of the FIG. 4a and the FIG. 4b).
[0066] Once the session release is detected, the transceiver unit [304], connected to
10 at least the detection unit [302], transmit a DHCP reconfigure request to the DHCP
client upon session release detection.
[0067] Further, the transceiver unit [304] is configured to receive a DHCP renew
request from the DHCP client in response to the DHCP reconfigure request, wherein
15 the DHCP renew request comprises the internet protocol (IP) address currently
assigned to the DHCP client.
[0068] The transceiver unit [304] is further configured to transmit a negative
response message to the DHCP client based on receipt of the DHCP renew request.
20 Further, the DHCP client releases the assigned IP address on receiving the negative
response message from the network.
[0069] Furthermore, the transceiver unit [304] receives at least one of a DHCP
discover message and a solicit message from the DHCP client to request a new IP
25 address assignment.
[0070] Moreover, the transceiver unit [304] transmits an acknowledgement to the DHCP client [404] for the received at least one of the DHCP discover message and the solicit message from the DHCP client. 30
19

[0071] Referring to FIG. 4A, an interactive environment [400A] for managing a
dynamic host configuration protocol (DHCP) session in a network [402], in a case
where the DHCP server is present within a gateway, in accordance with an
exemplary embodiment of the present disclosure is illustrated. Also, referring to
5 FIG. 4B, another interactive environment [400B] for managing a dynamic host
configuration protocol (DHCP) session in the network [402], in a case where the DHCP relay [402c] is present in the gateway [402a] in accordance with an exemplary embodiment of the present disclosure is illustrated. The interactive environment [400A], [400B] comprises at least one DHCP client [404], at least one
10 network [402] and at least one data network [406]. The network [402] further
comprises a gateway [402a]. In the interactive environment [400A], the gateway [402a] includes a DHCP server [402b]. In the interactive environment[400B], the gateway [402a] includes a DHCP relay [402c]. Further, the DHCP relay [402c] in the interactive computing environment [400B] is associated with the DHCP server
15 [402b]. Also, all of the components/ units of the interactive environment are
assumed to be connected to each other unless otherwise indicated below. Also, FIG. 4A and FIG. 4B has been explained in conjunction with each other in the foregoing description.
20 [0072] Generally, the network [402] is part of a computer network which
interconnects networks, providing a path for exchange of information and transfer of data between different data networks or subnetworks. The network [402] may comprise of one or more hardware devices, one or more data networks, one or more subnets, etc. that may be connected to each other.
25
[0073] Further, the network [402] comprises the gateway [402a]. The gateway [402a] serves as a bridge to transmit data between the DHCP client [404] and the data network [406]. The data network [406] comprises plurality of devices, such as computers, laptops, etc. connected to each other to exchange data between each
30 other. The data network [406] may be at least one of a Local Area Network (LAN),
20

a Wide Area Network (WAN), a Metropolitan Area Network (MAN) and a Storage Area Network (SAN).
[0074] Further, the DHCP client [404] to exchange data and information with the
5 data network [406] via the gateway [402a], the DHCP client [404] requires an IP
address. Further, for assigning the IP address to the DHCP client [404] as disclosed
in FIG. 4A the gateway [402a] comprises the DHCP server [402b]. The DHCP
server [402b] holds a pool of unique IP addresses and other configuration
parameters. The DHCP server [402b] assigns the IP address from the pool of IP
10 addresses to the DHCP client [404].
[0075] Furthermore, in another embodiment as disclosed in FIG. 4B, the gateway
[402A] comprises the DHCP relay [402c]. The DHCP relay [402c] works as a
communication channel between the DHCP client [404] and the DHCP Server
15 [402b]. The DHCP relay [402c] is configured to assign the IP address to the DHCP
client [404] when the DHCP server [402b] and the DHCP client [404] are not present in the same subnet.
[0076] Also, the network [402] works in conjunction with the system [300]. The
20 system [300] comprises the detection unit [302] associated with the network [402].
The detection unit [302], is configured to detect the session release of the DHCP
client [404]. The DHCP server [402b] in the DHCP session assigns the IP address
to the DHCP client [404] from the pool of unique IP addresses. The IP address is
assigned to the DHCP client [404] for a fixed period of time also known as a lease
25 time. The lease time allows the DHCP server [402b] to reclaim the IP address
assigned to the DHCP client [404]. When the DHCP server [402b] assigns the IP
address to the DHCP client [404], the DHCP server [402b] also sends the lease time
related to the IP address assigned to the DHCP client [404]. After the expiration of
the lease time, the DHCP server [402b] reclaims the IP address assigned to the
30 DHCP client [404]. The DHCP server [402b] may release the DHCP session when
the DHCP server [402b] finds that the IP address is no longer used by the DHCP
21

client [404], even if the lease time has not expired. Furthermore, when the DHCP
session is released, the assigned IP address returns to the pool of unique IP addresses
in the DHCP server [402b] and the IP address may be assigned to an another DHCP
client. Further, in an implementation, if the network [402] comprises the DHCP
5 relay [402c] (as shown in FIG. 4b), the DHCP relay [402c] may send the session
release message to the DHCP server [402b].
[0077] After detection of the session release message, the transceiver unit [304], associated with at least the detection unit [302] and the network [402], transmits a
10 reconfigure request message to the DHCP client [404]. The DHCP reconfigure
request message is sent by the DHCP server [402b] to the DHCP client [404]. Also, the DHCP reconfigure request message may be one of a FORCE RENEW message and a RENEW message. The DHCP reconfigure request message is sent by the DHCP server [402b] when the DHCP server [402b] has a new or an updated
15 information related to the configuration parameters. The DHCP reconfigure request
message allows the DHCP client [404] to initiate the DHCP renew procedure for the IP address assigned by the DHCP server [402b] to the DHCP client [404].
[0078] Further, the DHCP reconfigure request message may allow the DHCP client
20 [404] to initiate a renew procedure to renew the lease time related to the currently
assigned IP address. Further, to renew the lease time related to the currently
assigned IP address, the transceiver unit [304] is configured to receive a DHCP
renew request from the DHCP client [404]. The transceiver unit [304] also receives
the currently assigned IP address along with the DHCP renew request. The DHCP
25 client [404] through the DHCP renew request, requests the DHCP server [402b] to
renew the lease time of the IP address to continue to have a valid IP address and the
configuration parameters. Further, the DHCP server [402b] receives the IP address
currently assigned to the DHCP client [404] along with the DHCP renew request to
renew the lease time.
30
22

[0079] Furthermore, the transceiver unit [304], in response to the DHCP renew
request, transmits a negative response message to the DHCP client [404]. The
DHCP server [402b] transmits the negative response, whenever the DHCP server
[402b] receives a request related to the IP address that is invalid, for e.g. if the
5 DHCP client [404] sends a request for assignment of the IP address but the pool is
empty, then the DHCP server [402b] transmits, to the DHCP client [404], the
negative response denying the assignment of the IP address as there is no IP address
in the pool. Also, the negative response is sent to reject the request of the DHCP
client [404]. Further, upon receipt of the negative response from the DHCP sever
10 [402b], the DHCP client [404] releases the currently assigned IP address. Further,
upon the release of the IP address by the DHCP client [404], the IP address is returned to the pool of unique IP addresses, so that the IP address may be assigned to a new and/or a different DHCP client.
15 [0080] Furthermore, upon release of the IP address, the procedure of fresh
assignment of the IP address initiates. The transceiver unit [304] receives at least one of a DHCP discover message and a solicit message from the DHCP client [402] The transceiver unit [304] receives a request for assignment of a new IP address from the DHCP client [404]. The DHCP client [404] may be one of a DHCPv4
20 (Dynamic Host Configuration Protocol version 4) client and a DHCPv6 (Dynamic
Host Configuration Protocol version 6) client. Also, the DHCP server [402b] may be one of a DHCPv4 server and a DHCPv6 server. The DHCPv4 server receives the DHCP discover message from the DHCPv4 client. The DHCP discover message is a broadcast by the DHCPv4 client to locate the DHCPv4 server when the
25 DHCPv4 client attempts to connect to the network [402] for the first time. The
DHCPv6 server receives the solicit message from the DHCPv6 client. The solicit message is sent by the DHCPv6 client to locate the DHCPv6 server to connect to the network [402] for the first time. Further, at least one of the DHCP discover message and the solicit message is received by the DHCP server [402b] from the
30 DHCP client [404] to assign the new IP address to the DHCP client [404] as the
23

current IP address is released by the DHCP client [404] due to session release at the network [402].
[0081] Thereafter, upon receipt of at least one of the DHCP discover message and
5 the solicit message from the DHCP client [404], the transceiver unit [304] transmits
an acknowledgement message, related to the receipt of at least one of the DHCP
discover message and the solicit message, to the DHCP client [404]. Finally, after
transmitting the acknowledgement to the DHCP client [404], a new IP address is
assigned to the DHCP client [404] along with the other required configuration
10 parameters by the DHCP server [402b].
[0082] Referring to FIG. 5 an exemplary flow diagram of a method [500] for
managing a dynamic host configuration protocol (DHCP) session in a network, in
accordance with exemplary implementation of the present disclosure is illustrated.
15 In an implementation the method [500] is performed by the system [300]. Also, as
shown in FIG. 5, the method [500] initiates at step [502].
[0083] At step [504], the method comprises detecting, by a detecting unit [302] associated with the network [402], a session release of a DHCP client [404]. The
20 DHCP server [402b] in a DHCP session assigns the IP address to the DHCP client
[404] from the pool of unique IP addresses. The IP address is assigned to the DHCP client [404] for a fixed period of time also known as a lease time. The lease time allows the DHCP server [402b] to reclaim the IP address assigned to the DHCP client [404]. When the DHCP server [402b] assigns the IP address to the DHCP
25 client [404], the DHCP server [402b] also sends the lease time related to the IP
address assigned to the DHCP client [404]. After the expiration of the lease time, the DHCP server [402b] reclaims the IP address assigned to the DHCP client [404]. The DHCP server [402b] may release the session when the DHCP server [402b] finds that the IP address is no longer used by the DHCP client [404] even if the lease
30 time has not expired. Furthermore, when the session is released, the assigned IP
address returns to the pool of unique IP addresses in the DHCP server [402b] and
24

the IP address may be assigned to an another DHCP client. Further, in an implementation, the DHCP relay [402c] will also send the session release message to the DHCP server [402b]. Further, the network [402] may also comprise at least one of a DHCP server [402b] and a DHCP relay [402c]. 5
[0084] Next, at step [506], the method comprises transmitting, by a transceiver unit [304] associated with the network, a DHCP reconfigure request to the DHCP client upon session release detection. The DHCP reconfigure request message is sent by the DHCP server [402b] to the DHCP client [404]. Also, the DHCP reconfigure
10 request message may be one of a FORCE RENEW message and a RENEW
message. The DHCP reconfigure request message is sent by the DHCP server [402b] when the DHCP server [402b] has a new or an updated information related to the configuration parameters. The DHCP reconfigure request message allows the DHCP client [404] to initiate the DHCP renew procedure for the IP address assigned
15 by the DHCP server [402b] to the DHCP client [404].
[0085] Further, at step [508], the method comprises receiving, by the transceiver unit [304] associated with the network [402], a DHCP renew request from the DHCP client [404] in response to the DHCP reconfigure request, wherein the DHCP
20 renew request comprises an internet protocol (IP) address currently assigned to the
DHCP client [404]. The DHCP client [404] through the DHCP renew request, requests the DHCP server [402b] to renew the lease time of the IP address to continue to have a valid IP address and the configuration parameters. Further, the DHCP server [402b] receives the IP address currently assigned to the DHCP client
25 [404] along with the DHCP renew request to renew the lease time.
[0086] Further, at step [510], the method comprises transmitting, by the transceiver
unit [304] associated with the network [402], a negative response message to the
DHCP client [404] based on receipt of the DHCP renew request. The DHCP server
30 [402b] transmits the negative response, whenever the DHCP server [402b] receives
a request related to the IP address that is invalid, for e.g. if the DHCP client [404]
25

sends a request for assignment of the IP address but the pool is empty, then the
DHCP server [402b] transmits to the DHCP client [404], the negative response
denying the assignment of the IP address as there is no IP address in the pool. Also,
the negative response is sent to reject the request of the DHCP client [404]. Further,
5 the DHCP client [404] releases the assigned IP address on receiving the negative
response message from the network [402]. Further, upon the release of the IP address by the DHCP client [404] the IP address is returned to the pool of unique IP addresses, so that the IP addresses may be assigned to a new and/or a different DHCP client.
10
[0087] Furthermore, at step [512], the method comprises receiving, by the transceiver unit [304] associated with the network [402], at least one of a DHCP discover message or a solicit message from the DHCP client [404] to request a new IP address assignment. The transceiver unit [304] receives a request for assignment
15 of a new IP address from the DHCP client [404]. The DHCP client [404] may be
one of a DHCPv4 client and a DHCPv6 client. Also, the DHCP server [402b] may be one of a DHCPv4 server and a DHCPv6 server. The DHCPv4 server receives the DHCP discover message from the DHCPv4 client. The DHCP discover message is a broadcast by the DHCPv4 client to locate the DHCPv4 server when the
20 DHCPv4 client attempts to connect to the network [402] for the first time. Whereas
the DHCPv6 receives the solicit message from the DHCPv6 client. The solicit message is sent by the DHCPv6 client to locate the DHCPv6 server to connect to the network [402] for the first time. Further, at least one of the DHCP discover message and the solicit message is received by the DHCP server [402b] from the
25 DHCP client [404] to assign the new IP address to the DHCP client [404] as the
current IP address is released by the DHCP client [404] due to session release at the network [402].
[0088] Moreover, the method further comprises transmitting, by the transceiver
30 unit [304] associated with the network [402], an acknowledgement to the DHCP
client [404] for the received at least one of the discover message and the solicit
26

message from the DHCP client [404]. After transmitting the acknowledgement to the DHCP client [404] the new IP is assigned to the DHCP client [404] along with the other required configuration parameters by the DHCP server [402b].
5 [0089] Thereafter at step [514], the method [500] terminates.
[0090] Referring to FIG. 6 an exemplary signalling flow [600] between a DHCP
client [404] and a DHCP server [402b]/DHCP relay [402c] depicting a process for
managing a dynamic host configuration protocol (DHCP) session in a network, in
10 accordance with exemplary embodiments of the present disclosure is illustrated.
[0091] The process for managing a dynamic host configuration protocol (DHCP)
session in a network begins at step S1, where the session is established, and an IP
address is assigned to the DHCP client [404].
15
[0092] Prior to step 2, the session is released at the DHCP server [402a]/DHCP
relay [402c]. Further, in case if the network [402] is acting as the DHCP Relay
[402c], the DHCP relay [402c] may send DHCP Release message to the DHCP
server [402b] as well.
20
[0093] Next at step S2, the DHCP client [404] sends a Data Packet with source IP
not assigned. The DHCP client [404] sends the data packet in an uplink direction
using a currently assigned IP address.
25 [0094] Further, at step S3, the DHCP Server [402b]/DHCP Relay [402c] sends a
DHCP reconfigure request message to DHCP client [404].
[0095] Furthermore, upon receiving the DHCP reconfigure message, at step S4, the
DHCP client [404] sends a DHCP Request message to the DHCP Server
30 [402b]/Relay [402c] to renew its IP address. The DHCP client [404] also sends a
currently assigned IP address along with the DHCP renew request.
27

[0096] Thereafter, at step S5, the DHCP Server [402b]/DHCP Relay [402c] sends
a DHCP NAK message i.e., the negative response message to the DHCP client
[404]. The negative response message is sent by the DHCP server [402b]/DHCP
5 relay [402c] in response to the received DHCP renew message. After receiving the
negative response, the DHCP client [404] may release the assigned IP address.
[0097] Moreover, at step S6, fresh IP address assignment procedure begins and the
DHCP client [404] sends at least one of a DHCP discover and a solicit message to
10 the DHCP Server [402b]/DHCP Relay [402c].
[0098] The present disclosure further discloses a non-transitory computer readable storage medium storing one or more instructions for managing a dynamic host configuration protocol (DHCP) session in a network, the instructions include
15 executable code which, when executed by one or more units of a system, causes a
detecting unit [302] of the system [300] to detect a session release of a DHCP client [404]. Further, the executable code which, when executed causes a transceiver unit [304] of the system to transmit a DHCP reconfigure request to the DHCP client upon session release detection. Further, the executable code which, when executed
20 causes a transceiver unit [304] of the system [300] to receive a DHCP renew request
from the DHCP client [404] in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client [404]. Furthermore, the executable code which, when executed causes a transceiver unit [304] of the system [300] to transmit a negative
25 response message to the DHCP client [404] based on receipt of the DHCP renew
request. Moreover, the executable code which, when executed causes a transceiver unit [304] of the system [300] to receive at least one of a DHCP discover message or a solicit message from the DHCP client [404] to request a new IP address assignment.
30
28

[0099] As is evident from the above, the present disclosure provides a technically
advanced solution for managing a dynamic host configuration protocol (DHCP)
session in a network. The present solution that can inform the DHCP client about
its session deletion in the network immediately. Thus, minimizing the session
5 outage time, i.e., tending the session outage time to zero. Further, the present
solution to enable the DHCP Relay/Server to inform the DHCP client about its session deletion in the network. Moreover, the present solution that can minimize a session outage time in both the DHCPv4 and DHCPv6 scenarios.
10 [0100] While considerable emphasis has been placed herein on the disclosed
implementations, it will be appreciated that many implementations can be made and that many changes can be made to the implementations without departing from the principles of the present disclosure. These and other changes in the implementations of the present disclosure will be apparent to those skilled in the art, whereby it is to
15 be understood that the foregoing descriptive matter to be implemented is illustrative
and non-limiting.
[0101] Further, in accordance with the present disclosure, it is to be acknowledged that the functionality described for the various components/units can be
20 implemented interchangeably. While specific embodiments may disclose a
particular functionality of these units for clarity, it is recognized that various 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 as limiting the scope of the present disclosure. Consequently, alternative
25 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.
29

We Claim:
1. A method [500] for managing a dynamic host configuration protocol
(DHCP) session in a network [402], the method comprising:
- detecting, by a detecting unit [302] associated with the network [402], a session release of a DHCP client [404];
- transmitting, by a transceiver unit [304] associated with the network, a DHCP reconfigure request to the DHCP client [404] upon session release detection;
- receiving, by the transceiver unit [304] associated with the network [402], a DHCP renew request from the DHCP client [404] in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client [404];
- transmitting, by the transceiver unit [304], a negative response message to the DHCP client [404] based on receipt of the DHCP renew request; and
- receiving, by the transceiver unit [304], at least one of a DHCP discover message and a solicit message from the DHCP client [404] to request a new IP address assignment.

2. The method as claimed in claim 1, wherein the network [402] comprises at least one of a DHCP server [402b] and DHCP relay [402c].
3. The method as claimed in claim 1, wherein the method further comprises transmitting, by the transceiver unit [304], an acknowledgement to the DHCP client [404] for the received at least one of the discover message and the solicit message from the DHCP client [404].
4. The method as claimed in claim 1, wherein the DHCP client [404] releases the assigned IP address on receiving the negative response message from the network [402].

5. A system [300] for managing a dynamic host configuration protocol
(DHCP) session in a network [402], the system comprising:
- a detecting unit [302] associated with the network [402], wherein the detecting unit [302] is configured to detect, a session release of a DHCP client [404]; and
- a transceiver unit [304] is associated with at least the detection unit [302] and the network [402], wherein the transceiver unit [304] is configured to:

• transmit a DHCP reconfigure request to the DHCP client [404] upon session release detection;
• receive a DHCP renew request from the DHCP client [404] in response to the DHCP reconfigure request, wherein the DHCP renew request comprises an internet protocol (IP) address currently assigned to the DHCP client [404];
• transmit a negative response message to the DHCP client [404] based on receipt of the DHCP renew request; and
• receive at least one of a DHCP discover message and a solicit message from the DHCP client [404] to request a new IP address assignment.

6. The system [300] as claimed in claim 5, wherein the network [402] comprises at least one of a DHCP server [402b] and DHCP relay [402c].
7. The system [300] as claimed in claim 5, wherein the transceiver unit [304] is further configured to transmit an acknowledgement to the DHCP client [404] for the received at least one of the discover message and the solicit message from the DHCP client [404].

8. The system [300] as claimed in claim 5, wherein the DHCP client [404] releases the assigned IP address on receiving the negative response message from the network [402].