Method and apparatus for setting up and managing operational environment in P2P wireless networks
In a cognitive radio, a method of establishing an operational policy for use in a Peer-to-Peer (P2P) group, wherein the policy can be described by layers of policy parameters with progressively higher layers having a progressively increasing number of parameters, involves determining that a policy change is to be made from a current policy; requesting policy information from at least one P2P group member; receiving a policy description from the at least one P2P group member; and implementing a change in the lowest layer policy parameter to establish a new operational policy.
1. In a cognitive radio operating in a Peer-to-Peer (P2) group, a method of establishing an operational policy, wherein policy data are arranged in a hierarchy of layers, with higher layer of the hierarchy specifying fewer policy parameters than lower layers which specify increasing numbers of communication policy parameters, comprising:
determining that a policy change is to be made to a new operational policy;
determining a policy depth in terms of layers from a number of members of the P2P group;
requesting a layer of operational policy information from an authority;
receiving the layer of operational policy information from the authority;
correlating the layer with a specified operational policy;
if the layer correlates with the specified operational policy with at least a threshold level of correlation, then conducting a focused interrogation to obtain only the additional parameter or parameters needed to adjust the specified operational policy to the new operational policy;
if the layer does not correlate with the specified operational policy with at least the threshold level of correlation, then requesting a policy layer that specifies more parameters than the first policy layer in order to define the new operational policy; and
implementing the new operational policy.
2. The method according to claim 1 , wherein the specified operational policy comprises a current policy in use by the cognitive radio.
3. The method according to claim 1 , wherein the specified operational policy comprises a projection of new operational policy for use by the cognitive radio, wherein the projection is made by the cognitive radio using internal resources.
4. The method according to claim 1 , wherein the authority comprises one of a global, regional or local authority.
5. The method according to claim 1 , further comprising monitoring changes in the P2P group topology; and modifying the new operational policy when the P2P group topology changes in a manner that renders the new topology unsuitable for use as determined by the cognitive radio.
6. The method according to claim 1 , wherein the determining that a policy change is to be made is based upon a spatial change in the P2P group topology, so that the new policy is determined to be made before transmission from the cognitive radio is projected to enter the policy domain of another P2P group member.
7. The method according to claim 1 , wherein the determining that the policy change is to be made is based in part upon a number of P2P radios in a cluster of said P2P radios.
8. The method according to claim 1 , wherein the policy description comprises a policy description for a policy layer structure.
9. The method according to claim 1 , wherein the cognitive radio simultaneously belongs to a plurality of topologies of P2P radios, and wherein the cognitive radio stores a policy description for each topology.
10. The method according to claim 1 , wherein the requesting comprises requesting policy information from a cognitive radio belonging to a P2P cluster having a higher trust rating than another available P2P cluster.
11. The method according to claim 10 , wherein the trust rating is determined on the basis of at least one of: P2P cluster group size, depth of the layered structure of the policy, granularity of the layered structure of the policy, and temporal stability of the policy of the P2P cluster.