Abstract: A method is provided for mobile wireless ad hoc network, where network nodes using the same routing protocol are uniformly sharing a single contention channel. Network nodes are able to dynamically and distributedly switch roles according to surrounding network environment so that routing functions can be either activated or de-activated in order to improve routing efficiency and increase network capacity by reducing unnecessary routing overhead (which is caused by excessive redundant routing nodes). In addition, the nodes are able to self organize themselves into hierarchies or different roles according to different routing strategies. The proposed role-switching method can be implemented on network nodes which support existing routing protocols or native routing protocol proposed herein to further exploit the proposed role-switching method.

Abstract: Network communication from a client computer accessing an application service computer through use of the Internet (where the application service computer is normally protected from general Internet access by a firewall) is enabled by validating each computer message instance between the client computer and the application service computer against a first message permissive in a message address confirmation computer and a second message permissive in a firewall-tunnel computer. The firewall-tunnel computer and the message address confirmation computer interface directly to the Internet via secure protocol. The approach enables bi-directional multi-protocol communications by using HTTP protocol communications to the Internet in a computer systems infrastructure without need for re-configuration of firewall or NAT devices installed between the Internet and a network otherwise protected by a firewall or NAT device.