Patent ID: 8218511

Claim:
A gateway for forwarding transmission information between a first terminal node of a first network and a second terminal node of an ad hoc network, wherein the first terminal node is addressed by a global source address and the second terminal node is addressed by an ad hoc destination address, the gateway comprising: a transmission/reception unit adapted to receive transmission information from said first terminal node and to transmit said transmission information to said second terminal node; and an acknowledgment information detection unit adapted to detect the receipt of acknowledgment information from said second terminal node acknowledging that said second terminal node has received said transmission information; wherein said transmission/reception unit comprises a first tunnel setup unit for setting up a first tunnel link between said gateway and said second terminal node by encapsulating a transmission packet received from said first terminal node and having a global source address of said first terminal node and a global destination address of said second terminal node into a modified transmission packet having an ad hoc source address of said gateway and an ad hoc destination address of said second terminal node, wherein said transmission/reception unit transmits said transmission information and receives said acknowledgment information to and from said second terminal node respectively through said first tunnel link.