Active hot standby redundancy for broadband wireless network

A method, comprising:

• providing a plurality of host computers, each host computer adapted to run at least one of a plurality of publish-subscribe broker communications facilities, wherein the plurality of publish-subscribe broker communications facilities are inter-connected to form a publish-subscribe broker network;
• providing a plurality of (N+1) matching service instances, where N is a positive integer greater than zero, and where N service instances are designated as active service instances, and one service instance is designated as a standby service instance, wherein each of the (N+1) matching service instances is hosted on a different one of the plurality of host computers;
• wherein each of the N active service instances connects to a corresponding one of the publish-subscribe broker communications facilities in the publish-subscribe broker network and utilizes the publish-subscribe broker network to provide service to at least one client device of a plurality of client devices, where each of the plurality of client devices receiving service from a corresponding one of the N active service instances interacts with that service instance via a connection that each client device has with a corresponding publish-subscribe broker communications facility in the publish-subscribe broker network, and
• wherein the standby service instance connects to a corresponding one of the publish-subscribe broker communications facilities in the publish-subscribe broker network, and utilizes the publish-subscribe broker network to maintain application state information that corresponds to the application state information of each of the active service instances by subscribing to receive the same communications as is received by each of the active service instances for which the standby service instance is acting as a standby replacement instance;
• and
• wherein the standby service instance uses the services of the publish-subscribe broker network to maintain a communication with each of the N active service instances for which it is acting as the standby replacement instance to determine the ability of each of the active service instances to provide service, and further, when the standby service instance detects that one of the N active service instances can no longer provide its service, the standby service instance takes the role of providing the application service to the plurality of client devices that currently receive the service from the active service instance that is being replaced.