Patent ID: 8923181

Claim:
A method for, in an accessing device of an access network, controlling an IP packet from a user equipment, comprising: a. receiving an IP packet from a user equipment; b. checking said IP packet and determining whether said IP packet is a multicast IP packet that is allowed to pass, and if said IP packet is a multicast IP packet that has a multicast address that belongs to a desired valid multicast address, or if said IP packet is a desired type of multicast IP packet, taking said IP packet as said allowed multicast IP packet, wherein, if the IP packet received from the UE is said desired type of multicast IP packet, determining whether a time for the UE to send said desired type of multicast IP packet has exceeded a first desired value, and if a time for the UE to send the desired type multicast IP packet has not exceeded the first desired value, taking the IP packet as the allowed multicast IP packet; and c. in case that said IP packet is a multicast IP packet that is allowed to pass, sending said allowed multicast IP packet in multicast form.