Claims:WE CLAIM:

1. A method for optimizing usage of network resources in a communication network, the method comprising:

monitoring, by a routing server, session characteristics of an on-going session, user characteristics associated with a plurality of users involved in the on-going session, media server characteristics associated with a plurality of media servers, and network conditions of the communication network, wherein the on-going session is hosted by a plurality of session handling media servers from the plurality of media servers in the communication network;

comparing, by the routing server, the session characteristics, the user characteristics, the media server characteristics and the network conditions with corresponding set of pre-defined threshold values;

identifying, by the routing server, at least one media server from the plurality of the session handling media servers that violates the corresponding set of pre-defined threshold values based on the comparison, wherein the at least one identified media server of the plurality of session handling media servers is unable to host one or more users of the plurality of users connected to the identified at least one media server in the on-going session;

identifying, by the routing server, one or more alternate media servers from the plurality of media servers based on the media server characteristics associated with the plurality of media servers and the network conditions of the communication network; and

transferring, by the routing server, connectivity of the hosted one or more users to the one or more alternate media servers without disconnecting the on-going session to optimize the usage of the network resources.

2. The method as claimed in claim 1, wherein the session characteristics of the on-going session comprises information about session setup procedures, one or more policies associated with the on-going session and type of the on-going session initiated.

3. The method as claimed in claim 1, wherein the user characteristics comprise a first value indicative of a number of the plurality of users in the on-going session, current location of the plurality of users, mobility of the plurality of users, speed and direction of movement of the plurality of users, policies related to the plurality of users, and a second value indicative of a number of users entering the on-going session, and a third value indicative of a number of users exiting the on-going session.

4. The method as claimed in claim 1, wherein the media server characteristics comprises a fourth value indicative of a number of the plurality of session handling media servers used in the on-going session, information pertaining to system resources present in the plurality of media servers, a fifth value indicative of a number of users handled by the plurality of session handling media servers, a sixth value indicative of a number of the plurality of media servers, information pertaining to occupancy levels of resources on each of the plurality of media servers, inter media server distance, and information associated with the plurality of users handled by the plurality of session media servers.

5. The method as claimed in claim 1, wherein the network conditions comprise policies corresponding to selection of the plurality of session handling media servers and a congestion level of different network segments in the communication network.
6. The method as claimed in claim 1, wherein the comparison is performed upon identifying at least one of entry and exit of the one or more users in the on-going session, initiation and termination of mobility of the one or more users in the on-going session, changes in the media server characteristics, change in speed and direction of movement of the one or more users in the on-going session, and changes in policies related to one or more users from the plurality of users.

7. The method as claimed in claim 1, wherein the identified one or more alternate media servers satisfy a pre-defined network path length and an optimal usage of network resources in the communication network.

8. The method as claimed in claim 1, further comprising adapting the set of pre-defined threshold values based on average jitter identified from the on-going session and number of iterations required for identifying acceptable number of clusters comprising the plurality of users involved in the on-going session.

9. The method as claimed in claim 1, further comprising sharing information of transmission delays and network conditions of each of the plurality of media servers with the routing server.

10. The method as claimed in claim 9, further comprising buffering data packets of the on-going session and removing one or more jitters from the on-going session based on the shared information of transmission delay, an inter cluster distance and network conditions of the plurality of media servers.

11. A routing server for optimizing usage of network resources in a communication network, comprising:
a processor; and
a memory communicatively coupled to the processor, wherein the memory stores processor instructions, which, on execution, causes the processor to:
monitor session characteristics of an on-going session, user characteristics associated with a plurality of users involved in the on-going session, media server characteristics associated with a plurality of media servers and network conditions of the communication network, wherein the on-going session is hosted by a plurality of session handling media servers from the plurality of media servers in the communication network;

compare the session characteristics, the user characteristics, the media server characteristics and the network conditions with corresponding set of pre-defined threshold values;

identify at least one media server from the plurality of the session handling media servers that violates the corresponding set of pre-defined threshold values based on the comparison, wherein the at least one identified media server of the plurality of session handling media servers is unable to host one or more users of the plurality of users connected to the identified at least one media server in the on-going session;

identify one or more alternate media servers from the plurality of media servers based on the media server characteristics associated with the plurality of media servers and the network conditions of the communication network; and

transfer connectivity of the hosted one or more users to the one or more alternate media servers without disconnecting the on-going session to optimize the usage of the network resources.

12. The routing server as claimed in claim 11, wherein the session characteristics of the on-going session comprise information about session setup procedures, one or more policies associated with the on-going session and type of the on-going session initiated.

13. The routing server as claimed in claim 11, wherein the user characteristics comprise a first value indicative of a number of the plurality of users in the on-going session, current location of the plurality of users, mobility of the plurality of users, speed and direction of movement of the plurality of users, policies related to the plurality of users, and a second value indicative of a number of users entering the on-going session, and a third value indicative of a number of users exiting the on-going session.

14. The routing server as claimed in claim 11, wherein the media server characteristics comprises a fourth value indicative of a number of the plurality of session handling media servers used in the on-going session, information pertaining to system resources present in the plurality of media servers, a fifth value indicative of a number of users handled by the plurality of session handling media servers, a sixth value indicative of a number of the plurality of media servers, information pertaining to occupancy levels of resources on each of the plurality of media servers, inter media server distance, and information associated with the plurality of users handled by the plurality of session media servers.

15. The routing server as claimed in claim 11, wherein the network conditions comprise policies corresponding to selection of the plurality of session handling media servers and a congestion level of different network segments in the communication network.

16. The routing server as claimed in claim 11, wherein the processor performs the comparison upon identifying at least one of entry and exit of the one or more users in the on-going session, initiation and termination of mobility of the one or more users in the on-going session, changes in the media server characteristics, change in speed and direction of movement of the one or more users in the on-going session and changes in policies related to one or more users from the plurality of users.

17.The routing server as claimed in claim 13, wherein the identified one or more alternate media servers satisfy a pre-defined network path length and an optimal usage of network resources in the communication network.

18. The routing server as claimed in claim 11, wherein the processor further comprises adapting the set of pre-defined threshold values based on average jitter identified in the on-going session and number of iterations required for identifying acceptable number of clusters comprising the plurality of users involved in the on-going session, wherein the plurality of users in the number of clusters are within a pre-defined distance from centre of clusters.

19. The routing server as claimed in claim 11, wherein the processor transfers the connectivity of the hosted one or more users to the one or more alternate media servers based on the media server characteristics and network segment congestion level in the communication network.

20. The routing server as claimed in claim 11, wherein the processor is further configured to share information of transmission delays and network conditions of each of the plurality of session handling media servers with each other.

21. The routing server as claimed in claim 20, wherein the processor further comprises buffering data packets of the on-going session and removing one or more jitters from the on-going session based on the shared information of transmission delay, an inter cluster distance between identified acceptable number of clusters and network conditions of the plurality of media servers.

22. A method for optimizing network resources using a plurality of media servers in a communication network, the method comprising:
receiving, by a routing server, a request by a user from a plurality of users to initiate a session involving the plurality of users;
monitoring, by the routing server, media server characteristics associated with the plurality of media servers, user characteristics associated with the plurality of users and network conditions of the communication network;
identifying, by the routing server, the plurality of media servers for handling the session involving the plurality of users based on the monitoring, wherein each of the plurality of media servers individually has insufficient resources to host the session involving the plurality of users; and
connecting, by the routing server, one or more users from the plurality of users to the identified plurality of media servers for hosting the session based on the monitoring.
24. The method as claimed in claim 22, wherein the media server characteristics comprises a number of the plurality of media servers present in the communication network, information pertaining to system resources present in the plurality of media servers, inter media server distance.

25. The method as claimed in claim 22, wherein the user characteristics comprises number of the plurality of users in the requested session, current location of the plurality of users, mobility of the plurality of users, speed and direction of movement of the plurality of users, policies related to the plurality of users.

26. The method as claimed in claim 22, wherein the network conditions comprise policies corresponding to selection of the plurality of media servers and a congestion level of different network segments in the communication network.

27. A routing server for optimizing network resources using a plurality of media servers in a communication network, comprising:
a processor; and
a memory communicatively coupled to the processor, wherein the memory stores processor instructions, which, on execution, causes the processor to:
receive a request by a user from a plurality of users to initiate a session involving the plurality of users;
monitor media server characteristics associated with the plurality of media servers, user characteristics associated with the plurality of users and network conditions of the communication network;
identify the plurality of media servers for handling the session involving the plurality of users based on the monitoring, wherein each of the plurality of media servers individually has insufficient resources to host the session involving the plurality of users; and
connect one or more users from the plurality of users to the identified plurality of media servers for hosting the session based on the monitoring.

28. The routing server as claimed in claim 27, wherein the media server characteristics comprises a number of the plurality of media servers present in the communication network, information pertaining to system resources present in the plurality of media servers, inter media server distance.

29. The routing server as claimed in claim 27, wherein the user characteristics comprises number of the plurality of users in the requested session, current location of the plurality of users, mobility of the plurality of users, speed and direction of movement of the plurality of users, policies related to the plurality of users.

30. The routing server as claimed in claim 27, wherein the network conditions comprise policies corresponding to selection of the plurality of media servers and a congestion level of different network segments in the communication network.

Dated this 12th day of March, 2016

Swetha SN
Of K&S Partners
Agent for the Applicant
, Description:TECHNICAL FIELD

The present subject matter is related in general to communication network, more particularly, but not exclusively to a method and system for optimizing the usage of network resources in a communication network.