System, method, and computer program for caching policy request decisions in a consumer telecommunications network

A method, comprising:

• storing a plurality of policies for a network including billing policies, usage policies, access policies, and resource allocation policies, each of the policies capable of being evaluated based on one or more associated predefined criteria to produce a policy decision, the associated predefined criteria including:
• subscriber profile information,
• subscriber device class,
• subscriber location indicating a roaming status, and
• subscriber radio access type;
• evaluating a subset of the policies utilizing input values for the associated predefined criteria;
• storing, in cache for each of the evaluated policies, a cache entry including:
• (a) a policy decision produced from the evaluating of the policy, and
• (b) an indication of the input values utilized to produce the policy decision;
• for each of the policy decisions stored in one of the cache entries in the cache, making the policy decision simultaneously accessible to each of a plurality of subscribers of the network that are identified by the input values utilized to produce the policy decision;
• receiving at least one policy decision request associated with at least one subscriber of the network from a requesting system, the at least one policy decision request including at least one input value;
• determining whether the at least one input value included in the request matches any of the input values stored in the cache;
• responsive to determining that the at least one input value included in the request matches one or more of the input values stored in the cache:
• (c) retrieving, from the cache, the policy decision associated with each of the one or more of the input values stored in the cache that match the at least on input value included in the request, and
• (d) providing the retrieved policy decisions to the requesting system;
• and
• responsive to the determining that the at least one input value included in the request does not match any of the input values stored in the cache:
• (e) determining which of the stored policies are relevant to the request by determining which of the stored policies have associated predefined criteria that is relevant to the at least one input value included in the request,
• (f) evaluating the relevant policies utilizing the at least on input value included in the request to produce a policy decision for each of the relevant policies,
• (g) providing, to the requesting system, the policy decisions produced for the relevant policies, and
• (h) storing, in the cache for each of the relevant policies:
• (1) the policy decision produced from evaluating the relevant policy, and
• (2) an indication of which of the at least one input value included in the request was utilized to produce the policy decision;
• maintaining, for each of the policy decisions in the cache, a reference count of a number of the subscribers with current sessions in the network that are identified by the input values utilized to produce the policy decision and accordingly are currently using the policy decision in the cache;
• and
• automatically removing each of the plurality of policy decisions from the cache when the reference count maintained for the policy decision is zero for a predefined period of time.

A system comprising:

• a memory system;
• and
• one or more processing cores coupled to the memory system and that are each configured to:
• store a plurality of policies for a network including billing policies, usage policies, access policies, and resource allocation policies, each of the policies capable of being evaluated based on one or more associated predefined criteria to produce a policy decision, the associated predefined criteria including:
• subscriber profile information,
• subscriber device class,
• subscriber location indicating a roaming status, and
• subscriber radio access type;
• evaluate a subset of the policies utilizing input values for the associated predefined criteria;
• store, in cache for each of the evaluated policies, a cache entry including:
• (a) a policy decision produced from the evaluating of the policy, and
• (b) an indication of the input values utilized to produce the policy decision;
• for each of the policy decisions stored in one of the cache entries in the cache, make the policy decision simultaneously accessible to each of a plurality of subscribers of the network that are identified by the input values utilized to produce the policy decision;
• receive at least one policy decision request associated with at least one subscriber of the network from a requesting system, the at least one policy decision request including at least one input value;
• determine whether the at least one input value included in the request matches any of the input values stored in the cache;
• responsive to determining that the at least one input value included in the request matches one or more of the input values stored in the cache:
• (c) retrieve, from the cache, the policy decision associated with each of the one or more of the input values stored in the cache that match the at least on input value included in the request, and
• (d) provide the retrieved policy decisions to the requesting system;
• and
• responsive to the determining that the at least one input value included in the request does not match any of the input values stored in the cache:
• (e) determine which of the stored policies are relevant to the request by determining which of the stored policies have associated predefined criteria that is relevant to the at least one input value included in the request,
• (f) evaluate the relevant policies utilizing the at least on input value included in the request to produce a policy decision for each of the relevant policies,
• (g) provide, to the requesting system, the policy decisions produced for the relevant policies, and
• (h) store, in the cache for each of the relevant policies:
• (1) the policy decision produced from evaluating the relevant policy, and
• (2) an indication of which of the at least one input value included in the request was utilized to produce the policy decision;
• maintain, for each of the policy decisions in the cache, a reference count of a number of the subscribers with current sessions in the network that are identified by the input values utilized to produce the policy decision and accordingly are currently using the policy decision in the cache;
• and
• automatically remove each of the plurality of policy decisions from the cache when the reference count maintained for the policy decision is zero for a predefined period of time.