Reza Ghanadan - Berkeley Heights NJ, US John Gu - Rockaway NJ, US Jessica Y. Hsu - Washington DC, US Gregory S. Sadosuk - Fairfax VA, US Phong C. Khuu - Ashburn VA, US Brian Loop - Fairfax VA, US
Assignee:
BAE Systems Information and Electronic Systems Integration Inc. - Nashua NH
International Classification:
H04L 12/24
US Classification:
3702301, 370231, 370252, 370412
Abstract:
A wireless communications network comprising a plurality of nodes and effective to provide quality of service requirements for packets being transmitted. An ingress node calculates variables based on quality of service requirements and places those variables in a header of a packet to be transmitted. The packet is then transmitted to a core node. The core node reads the variables in the packet and calculates a holding time for the packet based on the variables and the quality of service requirements.
Time Synchronization For Distributed Mobile Ad Hoc Networks
Shaomin Mo - Montville NJ, US John A. Gu - Rockaway NJ, US Jessica Y. Hsu - Washington DC, US Ming Luo - Fairfax VA, US Reza Ghanadan - Berkeley Heights NJ, US
Assignee:
BAE Systems Information and Electronic Systems Integration Inc. - Nashua NH
International Classification:
H04J 3/06
US Classification:
370350, 370462, 370509
Abstract:
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 (T) 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.
Reza Ghanadan - Berkeley Heights NJ, US John A. Gu - Rockaway NJ, US Jessica Y. Hsu - Washington DC, US Gregory S. Sadosuk - Fairfax VA, US Phong C. Khuu - Ashburn VA, US
Assignee:
BAE Systems Information and Electronic Systems Integration Inc. - Nashua NH
International Classification:
G01R 31/08
US Classification:
370252, 370310, 370328, 370256
Abstract:
Systems and methods provide adaptability in a mobile ad hoc network (MANET), based on an existing protocol, such as adaptive hybrid domain routing (AHDR). The systems and methods are especially suited for fast changing topologies that may change after a reactive route discovery has been completed.
Adaptive Message Routing For Mobile Ad Hoc Networks
Reza Ghanadan - Berkeley Heights NJ, US John Gu - Rockaway NJ, US Jessica Hsu - Clifton NJ, US Greg Sadosuk - Fairfax VA, US Phong Khuu - Ashburn VA, US
International Classification:
H04B 7/005
US Classification:
370310
Abstract:
Domains are formed in a mobile ad hoc network by exchanging topology update messages among neighboring nodes, each message including the node coverage of the originating node. The node having an optimum coverage of its neighbors becomes a domain lead (DL) node, and nodes within hearing distance or range of the DL node form a network domain. Each domain node, including the DL, selects a set of bridge nodes (BNs) that can link the domain node to nodes in corresponding neighboring domains. All domain lead nodes in the network exchange messages to inform one another of the nodes contained in their respective domains. A node in one domain seeking a route for a message destined to a node in another domain, may send a route discovery (RDisc) message to the DL node of the inquiring node's domain. A responsive route resolution (RRes) message is returned to the inquiring node.
Multiuser Detection Enabled Medium Access Control In Mobile Ad Hoc Networks
Shaomin Mo - Montville NJ, US John A. Gu - Rockaway NJ, US Ming Luo - Fairfax VA, US Joseph Farkas - Merrimack NH, US Reza Ghanadan - Berkeley Heights NJ, US
International Classification:
H04W 72/04
US Classification:
370329
Abstract:
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.
Distributed Scheduler Design For Multiuser Detection Enabled Wireless Mobile Ad-Hoc Networks
Shaomin Mo - Montville NJ, US John A. Gu - Rockaway NJ, US Joseph Farkas - Merrimack NH, US Ming Luo - Fairfax VA, US Reza Ghanadan - Berkeley Heights NJ, US
International Classification:
H04W 72/12
US Classification:
370329
Abstract:
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.