摘要:
Each mobile ad hoc node has an assigned hierarchy position within an identified tree-based aggregation group. Each ad hoc node is configured for selectively attaching to one of a plurality of available ad hoc nodes based on identifying a best match, for the assigned hierarchy position within the identified aggregation group, from among identifiable hierarchy positions of identifiable aggregation groups. Each ad hoc node also is configured for selectively attaching to any available ad hoc node based on a determined absence of any available ad hoc node advertising the identified aggregation group of the ad hoc node, or an aggregation group containing the identified aggregation group. Hence, a root node of an aggregation group can filter group-specific routing information from packets destined toward a network clusterhead, resulting in a scalable routing protocol that is not adversely affected by added nodes.
摘要:
The present invention relates to a wireless communication data transmission method considering the number of terminals requesting services. The present invention provides a wireless communication base station for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication. The base station comprises a storage unit for storing terminal information including the number of terminals which have joined the multicast service, and a priority determining unit for setting a user priority of a data frame to be transmitted using the terminal information. According to the present invention, a priority of data to be transmitted is determined in consideration of the number of serviced terminals, and thus, the data can be reasonably transmitted.
摘要:
A node (5) for wireless networking includes a short-range radio module, a long-range radio module and a control and routing module. The control and routing module is arranged to determine whether the node should serve as a base station (36) for a short-range wireless network (9 1 ) and to determine whether the node should serve as a gateway (35) for co-operating with another gateway to connect short-range wireless networks (9 1 ) so as to form a long-range wireless network (11).
摘要:
A method is provided for sending data in a wireless ad-hoc network (10) including a plurality of nodes (11) grouped into clusters of nodes (12) and a plurality of wireless links (16) connecting the plurality of nodes (11), where each cluster node (11) has a designated cluster leader node (21)-(23). The method may include sending a cluster-level route request from a source node of a source cluster to a cluster leader node of the source cluster, and determining a cluster level route between the source cluster and a destination cluster including a destination node responsive to the cluster-level route request and using a plurality of the cluster leader nodes. Furthermore, at least one cluster target node may be designated in a cluster along the cluster-level route, and a node-level route determined from the source node to the destination node including the at least one cluster target node.
摘要:
A mobile communication system (1) is constructed including a plurality of cluster heads (10a), cluster members (10b), a topology management device (20), and a location management device (30). Each cluster head (10a) exchanges routing information with only each cluster member in a cluster to which the terminal itself (host terminal) belongs, and with only a cluster head in another cluster adjacent to the cluster to which the host terminal belongs. Each cluster member (10b) exchanges routing information with only a cluster head in a cluster to which the host terminal belongs. The topology management device (20) and location management device (30) receive the routing information from each cluster head only.
摘要:
A mobile router is configured for optimized utilization of reverse routing headers, to specify a path between an originating mobile router and a home agent. Reverse routing headers enable each mobile router within the path to the home agent to specify its care of address, enabling the home agent to establish a bidirectional tunnel to the originating mobile router via the corresponding mobile router. The mobile router selectively updates the reverse routing header in a received packet by inserting the source address value of the received packet into the reverse routing header and inserting its corresponding care of address into the specifies reachability of a most recent entry in the reverse routing header via the source address value. The mobile router also may request the originating mobile router to increase the reverse header size.
摘要:
A method for sending data in a mobile ad-hoc network may include a plurality of nodes grouped into clusters of nodes (12) and a plurality of wireless links (16) connecting the plurality of nodes (11,14,15), where each cluster node has a designated cluster leader node (21-33). The method may include sending a cluster-level route request from a source node of a source cluster to a cluster leader node of the source cluster, and determining a cluster-level route (18) through the source cluster and a destination cluster including a destination node responsive to the cluster-level route request and using a plurality of the cluster leader nodes. Furthermore, the method may also include determining node-level routes through each cluster along the cluster-level route to a cluster target node in a next cluster along the cluster-level route. Recovery for cluster-level and node-level routing errors/failures is also provided.
摘要:
An architecture for a radio network having nodes that are subject to dynamically changing topology such as, e.g., a mobile radio network. The network is partitioned into a number of physical subnets wherein each physical subnet includes a certain number of network nodes in relatively close proximity to one another. Each node of each physical subnet is affiliated with a corresponding node of each of the other physical subnets, thus defining a certain number of virtual subnets. A desired communications path is routed from a source node of one physical subnet to a destination node of another physical subnet, by routing certain parts of the path within one or more physical subnets during a first transmission phase, and routing remaining parts of the path within one or more virtual subnets during a second transmission phase.
摘要:
A network protocol for low-cost, low-power devices coupled to a self-organizing wireless network using a spanning tree backbone architecture is described. In this protocol, physical and logical network construction and maintenance operations, which supports efficient data routing in the network, are performed. The construction phase in conjunction with the maintenance phase insures the self-organizing capability of the network. At the same time, the maintenance operations provide a self-healing mechanism so that the network can recover from node failures and a self-updating mechanism so that the network can expand as more nodes enter the system. Also, the logical backbone hierarchy will facilitate multi-hop communication. The construction of a logical layered spanning tree backbone architecture from an underlying physical topology allows seamless data communication routing between all nodes in the network.
摘要:
A method for configuring a wireless data packet network comprising a control node and multiple individual nodes includes the following steps: organizing the network into multiple bands Bi each band including individual nodes located i hops away from the control node; assigning a logical address to each individual node. A routing logical address is added to every data packet and each individual node compares its own logical address to the routing address of a received packet. In dependence on the result of the comparison, the packet is discarded, re-transmitted or processed in the node. The network is preferably a packet-hopping wireless network in which data packets are transferred from node to node over a common RF channel.