Policy implementation over lmr and ip networks

Abstract

A communication system is made up of a number of LMR and IP bearers including LTE and P25. The information flowing over the integrated system is managed according to the situational context of the user. A policy driven approach is described that uses user context as its inputs and converts this into actions that preferentially improves the communication for the user particularly as they move between the available networks.

What is claimed is: 
     
         1 . A method of policy implementation in a communication system having LMR and IP networks, including:
 receiving context information from a mobile terminal which is operating in a first one of the networks,   using the context information to determine a policy which relates to the terminal in the first network,   implementing the policy in the first network in relation to the terminal,   determining that the terminal is transferring operation from the first network to the second network, and   maintaining the policy in the second network in relation to the terminal, once the terminal has transferred to the second network.   
     
     
         2 . A method of policy implementation according to  claim 1  wherein at least some of the steps are carried out at the mobile terminal. 
     
     
         3 . A method according to  claim 1  wherein the second network has an existing policy or rules system and said maintaining the policy in the second network includes changing existing policy or rules in the existing system. 
     
     
         4 . A method according to  claim 1  wherein the policy relates to rates of traffic in the networks. 
     
     
         5 . A method according to  claim 1  wherein the policy relates to latency of traffic in the networks. 
     
     
         6 . A method according to  claim 1  wherein the policy relates to selection of an alternative network for calls when a preferred network is busy. 
     
     
         7 . A method according to  claim 1  wherein the policy relates to selection of a lowest cost network. 
     
     
         8 . A method according to  claim 1  wherein the first and second networks are respectively the LMR and IP networks, the context is an emergency, and the policy gives priority to an emergency call by the terminal. 
     
     
         9 . A method of policy implementation in a communication system having LMR and IP networks, including:
 receiving context information from a mobile terminal which is operating in a first one of the networks,   using the context information to determine a policy which relates to the terminal in the first network,   transferring operation of the terminal from the first network to the second network as a result of the policy, and   maintaining the policy in the second network once operation of the terminal has been transferred.   
     
     
         10 . A method of policy implementation according to  claim 9  wherein at least some of the steps are carried out at the mobile terminal. 
     
     
         11 . A method according to  claim 9  wherein the second network has an existing policy or rules system and said maintaining the policy in the second network includes changing existing policy or rules in the existing system. 
     
     
         12 . A method according to  claim 9  wherein the first and second networks are respectively the LMR and IP networks, the context is reduced battery power, and the IP network requires less power for operation of the terminal. 
     
     
         13 . A method according to  claim 9  wherein the first and second networks are respectively IP and LMR networks, and the policy is forced joining of an LMR group based on geographical location. 
     
     
         14 . Apparatus for implementing policy in a communication system having LMR and IP networks, including:
 a context database which receives information relating to the context of one or more mobile terminals operating in the networks,   a policy database containing rules relating to the operation of one or more mobile terminals in either network,   an event detector which detects a change in the context of a terminal according to information in the context database, and determines any corresponding change of policy according to information in the policy database, and   a policy enforcer which implements the corresponding change of policy in either of the networks as required in relation to operation of the terminal, and maintains the change of policy when the terminal transfers between networks.   
     
     
         15 . Apparatus according to  claim 14  which is located inside the mobile terminal. 
     
     
         16 . Apparatus according to  claim 14  wherein the second network has an existing policy or rules system and said maintaining the policy in the second network includes changing existing policy or rules in the existing system. 
     
     
         17 . Apparatus according to  claim 14  wherein a policy requires the implementation of multiple rules for operation of the terminal. 
     
     
         18 . Apparatus according to  claim 14  wherein one policy in the policy database includes maintaining priority of an emergency call when a terminal moves between the LMR and IP networks. 
     
     
         19 . Apparatus according to  claim 14  wherein one policy in the policy database includes transferring operation of a terminal from the LMR network to the IP network when battery power of the terminal runs low. 
     
     
         20 . Apparatus according to  claim 14  wherein one policy includes forced joining of an LMR group based on geographical location.