Patent ID: 9131485
Filing Date: 2015-09-08
Classification: H04L,H04W

Abstract:
1. A method in a telecommunication network, the method comprising: storing a pool of free addresses, wherein each address included in the pool of free addresses is available to be allocated to a user equipment (UE); receiving, at a first network node, a packet data network (PDN) connection revocable deletion request transmitted by a second network node and identifying a PDN connection being used by a first UE, said PDN connection being associated with PDN connection data and with IP address information allocated to the first UE, the allocated IP address information comprising one or more of an IP address and an IPv6 prefix and the IP address information is not included in the pool of free addresses; in response to receiving the PDN connection revocable deletion request, the first network node deleting the PDN connection data and reserving said allocated IP address information for said first UE wherein said step of reserving said allocated IP address information for said first UE comprises keeping said allocated IP address information out of the pool of free addresses so that the allocated IP address information is not available to be allocated to any UE other than said first UE since the allocated IP address information is reserved for said first UE; and responding to the PDN connection revocable deletion request with a PDN connection revocable deletion response message including the allocated IP addresses information.