Geo-redundant pcrf mra with mpe allocation via imsi hashing and ip indexed table

A system comprising:

• a wireless access network;
• a gateway configured to control communications between the wireless access network and a packet data network;
• and
• a policy-charging-and-rule-function (PCRF) comprising a routing agent communicably connected to the gateway and a plurality of multi-media processing engines (MPEs) associated with the routing agent,
• wherein the routing agent is configured to receive from the gateway a request to establish a session for a piece of user equipment and to select one of the plurality of MPEs to handle the session based on a user-equipment-identifier of the piece of user equipment.

A policy-charging-and-rule-function comprising:

• a routing agent;
• and
• a plurality of multi-media processing engines (MPEs);
• wherein the routing agent includes at least one processor and at least one non-transitory computer-readable medium having program code stored thereon, the program code being executable by the at least one processor and configured to, when executed, cause the routing agent to establish a session for a piece of user equipment by:
• receiving a request to establish the session;
• selecting one of the plurality of MPEs to handle the session based on a user-equipment-identifier of the piece of user equipment.