Patent ID: 9391894
Filing Date: 2016-07-12
CPC Classification: H04L,H04W

Claim Text:
1. A method of determining whether to forward or discard data packets received at an access node of a network, the method comprising: first obtaining, by the access node, a plurality of network prefixes, each of the plurality of network prefixes being allocated to one of a plurality of Customer Premises Networks (CPNs) by a network prefix allocation server, each of the one or more CPNs being associated with at least one Residential Gateway and at least one user terminal; second obtaining a plurality of valid lifetime information, from a plurality of network prefix allocation messages, each of the plurality of valid lifetime information corresponding to one of the plurality of network prefixes; updating the valid lifetime information corresponding to one or more of the plurality of network prefixes based on the obtained plurality of valid lifetime information; adding, by the access node, the plurality of network prefixes and a corresponding one of the plurality of valid lifetime information to a valid network prefix set; receiving, at the access node, a data packet from one of the at least one Residential Gateway; and forwarding, by the access node, the received packet if a network prefix in the received data packet corresponds to one of the plurality of network prefixes in the valid network prefix set.