A link-layer tunneling mechanism for unidirectional links

The unidirectional transmission links such as broadcast satellite links ari d cable links are strongly demanding type of link to provide high bandwidth and ubiquitous Internet connectivity with lower cost. In order to provide an internet connectivity, the UDLs, unidirectional links, should be availab le for the IP service. However. since the current Internet routing and uppe r layer protocols assume the bi-directional link. the UDLs have been consid ered as unavailable links for the IP service. This paper proposes an archit ecture and a mechanism for the IP service over the UDL. The proposed system emulates the bi-directional connectivity between all nodes on the UDL, in order to use the dynamic routing protocol, the TCP/IP protocol, on the UDL system. Reveiver uses a link layer tunneling mechanism to forward the IP da tagrams to the Feed over an IP cloud. that is not directly connected to the UDL. This proposed architecture enables the dynamic routing capability for UDLs, as well Li user applications, without any software modification.