Method and Arrangement for Implementing Policy Rules in Peer-to-Peer Communication

A method in a policy node for controlling a peer-to-peer communication involving media communication between a subscriber and one or more opposite peers, the method comprising:

• detecting that the peer-to-peer communication is activated for the subscriber by detecting signaling associated with an application function that is invoked to execute the peer-to-peer communication for the subscriber;
• determining session parameters for the media communication between said subscriber and the opposite peer(s) based on predefined peer-to-peer service rules, wherein the peer-to-peer service rules have been configured at the policy node as valid for said subscriber when executing peer-to-peer sessions with the opposite peers, and wherein a policy negotiation is performed with the application function to determine said session parameters;
• and
• ordering an access gateway configured to establish and control network resources, to implement said session parameters for the media communication between said subscriber and the opposite peer(s), to control the media communication in accordance with the predefined peer-to-peer service rules.

A policy node configured to control a peer-to-peer communication involving a media communication between a subscriber and one or more opposite peers, the policy node comprising:

• a detecting unit configured to detect that the peer-to-peer communication is activated for the subscriber by detecting signaling associated with an application function that is invoked to execute the peer-to-peer communication for the subscriber;
• a determining unit configured to:
• determine session parameters for the media communication based on predefined peer-to-peer service rules, wherein the predefined peer-to-peer service rules have been configured at the policy node as valid for said subscriber when executing peer-to-peer sessions with opposite peers;
• and
• perform a policy negotiation (PN) with the application function to determine said session parameters;
• and
• an ordering unit configured to order an access gateway that is responsible for establishing and controlling network resources, to implement said session parameters (SP) for the media communication between said subscriber and the opposite peer(s), to control the media communication in accordance with the predefined peer-to-peer service rules.

An application function configured to enable control of a peer-to-peer communication involving media communication between a subscriber and one or more opposite peers, the application function comprising:

• a service unit configured to initiate and execute said peer-to-peer communication for the subscriber;
• a determining unit configured to determine one or more peers available for communication with the subscriber when the application function is invoked to execute said peer-to-peer communication for the subscriber;
• a negotiation unit configured to perform a policy negotiation (PN) with a policy node to determine session parameters for the media communication based on predefined peer-to-peer service rules, wherein the predefined peer-to-peer service rules have been configured at the policy node as valid for said subscriber when executing peer-to-peer sessions with opposite peers;
• and
• a sending unit configured to send a first list with the determined one or more peers to the policy node, to enable the policy node to control the media communication in accordance with the predefined peer-to-peer service rules and said list.