41 results about "Wireless mobile ad hoc networks" patented technology

A system and method for information dissemination in a wireless mobile ad hoc network. A method describes receiving a request to communicate a message from a source node to a destination, identifying each neighbor node of an ad hoc network, invoking a proactive border node broadcast protocol at the source node when the destination is a neighbor node and wherein the number of hops to the destination is less than a predetermined number of hops, invoking an on-demand border node broadcast protocol at the source node when the number of hops from the source node to the destination exceeds the predetermined number, and communicating the message from the source node based on the invoked broadcast protocol. A computer readable medium containing a computer program for information dissemination in a wireless mobile ad hoc network is also provided. Finally, a system for information dissemination in a wireless mobile ad hoc network is described.

Time synchronization among nodes in a wireless mobile ad hoc network (MANET) is obtained using a cross layer approach. Each node maintains a routing table that contains entries corresponding to other nodes of the network that are one or more hops away from the node, and topology messages are exchanged periodically among the nodes in order to update their routing tables. A network master node is selected, and remaining nodes that are one or more hops away from the master node are defined as slave nodes. The master node includes master timing information in the topology messages it transmits. The timing information is concatenated to include a first time (T1) at which a topology message was received by the master from each of the slave nodes, and a second time (td) at which the master node transmits a topology message after receiving all the topology messages from the slave nodes.

A system and method for improving digital communication in a wireless mobile ad-hoc network. More specifically, the system includes one or more portable network devices operable to support the seamless operation of a self-initializing, self-healing, adaptive portable network. The portable network devices implement protocols that provide bandwidth management capabilities for use with radios, routers and other wireless network devices. Each portable network device includes at least one wireless transceiver, a processor and control software. The processor and control software are logically coupled to the wireless transceiver to facilitate digital communication via a plurality of communication channels with other network devices.

In the method for operating an interference multiple access communications system, wherein the improvement comprises the steps of employing a distributed scheduler within a Media Access Controller (MAC) for Multiuser Detection (MUD) enabled Mobile Ad-hoc Networks (MANETS) to increase spectral efficiency by increasing spectral use and providing a way to dynamically allocate virtual channels to achieve maximum channel reuse in different network topologies and different link patterns and to ameliorate any hidden or exposed node problems.

A method of providing medium access control for a wireless mobile ad hoc network includes defining a TDMA network timing frame including a data (DATA) zone having one or more time slots structured to support multiuser detection (MUD) of concurrent transmissions during each slot, a negative acknowledgment (NACK) zone during which nodes transmit requests for retransmission of packets destined to but not successfully received by the nodes, a broadcast (BC) zone during which network management messages are broadcast to the nodes, and a control (CTRL) zone. A primary master (PM) node is selected and operates as a source of network time for all the nodes. Each node synchronizes its time to that of the PM node during the CTRL zone in a distributed manner, by exchanging control messages with the PM node or other nodes located one or more hops from the PM node.

The present invention relates to a communication volume regional distribution method in the wireless mobile self organizing network measurement. The procedure is: an aerial vehicle is used to collect data in the air above the target area; the flight track and the investigating area are positioned through the GPS and the wireless network card on the aerial vehicle, the signal intensity of the communication node is measured, and the distance between the communication node and the investigating position is calculated through a signal intensity formula; the central position of the measured communication node is positioned by utilizing position information of the nodes on the two unparallel edges in the communication scope of a communication node and the distance information; the communication volume of various communication node is identified through the communication volume of the communication node on the flight track acquired by the wireless equipment according to the MAC address. The present invention can be applied in the investigation to the military conduction center of the hostile party by a pilotless airplane in the military battlefield environment, and the existence of the hostile party military conduction center is judged through the intensity degree of the communication volume; the present invention can be also used to detect the communication conflict scope of the mobile node, and used for the adjustment, assessment and test of the routing protocol in the wireless mobile self organizing network.

The invention belongs to the technical field of wireless communication, discloses a wireless mobile self-organizing network clustering cross-layer communication control method, system and application, compares the maximum throughput of nodes using different communication radii, and obtains the optimal density of nodes under this density Communication radius; divide time periodically into time slices, in each time slice, divide into neighbor discovery period and data transmission period; after each node detects the node density around itself, determine the appropriate communication radius, In the data transmission stage, the routing mechanism of the clustering cross-layer protocol HCVCR with variable communication radius is based on the routing discovery and establishment mechanism of passive routing AODV. The present invention improves the space division multiplexing efficiency of the area by using a relatively small communication radius in the area where the nodes are dense, and the nodes can access the channel faster; the area where the nodes are sparse enables a larger communication radius, avoiding The emergence of isolated nodes improves the overall throughput of the network.