In a self-organizing wireless multihop network, each node device selects operation among short-range (SR) and long-range (LR) communication modes, among which the SR mode uses a higher data rate than the LR mode. Each node device advertises connectivity link availability for neighboring node devices, and selectively initiates a link in response to connectivity availability advertised by at least one neighboring node device. The availability advertising is performed in the SR and the LR communication modes, according to a periodicity that is dynamically-variable in response to prevailing circumstances in the local neighborhood. The link initiation is selectively performed in one of either the SR or the LR communication mode based on selection criteria that include data throughput performance associated with different neighboring node devices with which connectivity is available via a certain communication mode.

A system, method and computer program product for determining an optimal hello packet interval in a radio communications network having a plurality of nodes is disclosed. At each reference node in the network a relative velocity is determined between that reference node and at least one other node within communication range of the reference node based upon a GPS location of the reference node and a GPS location of the at least one other node. A level of mobility within the network is then determined based upon the relative velocities between the reference nodes and the other nodes. The level of mobility is compared to a specific threshold and the hello packet interval may be optimally adjusted based upon the comparison of the level of mobility to the specific threshold.

A system, method and computer program product for determining an optimal hello packet interval in a radio communications network having a plurality of nodes is disclosed. At each reference node in the network a relative velocity is determined between that reference node and at least one other node within communication range of the reference node based upon a GPS location of the reference node and a GPS location of the at least one other node. A level of mobility within the network is then determined based upon the relative velocities between the reference nodes and the other nodes. The level of mobility is compared to a specific threshold and the hello packet interval may be optimally adjusted based upon the comparison of the level of mobility to the specific threshold.

A method and system for providing a bio-inspired routing protocol using overhearing and probabilistic path finding in a mobile ad hoc network is provided, which can provide correct routing information for a destination, prevent a stagnation problem that repeatedly finds the same path because path finding depends mainly on regular pheromone values, also prevent the unnecessary creation of proactive ant packets and the increase of overhead which are caused by the stagnation problem, and decrease the probability with which an alternative path to be used in the event of link failure cannot be secured in advance.

A method and system for providing a bio-inspired routing protocol using overhearing and probabilistic path finding in a mobile ad hoc network is provided, which can provide correct routing information for a destination, prevent a stagnation problem that repeatedly finds the same path because path finding depends mainly on regular pheromone values, also prevent the unnecessary creation of proactive ant packets and the increase of overhead which are caused by the stagnation problem, and decrease the probability with which an alternative path to be used in the event of link failure cannot be secured in advance.

Provided is a Weighted DESYNC based cross-layered resource allocation method. The method includes, with respect to each of a plurality of nodes constituting a routing path, calculating a link quality value with the next node, receiving a link quality value from at least one neighbor node, and based on the link quality values in the calculating of the link quality value and the receiving of the link quality value, calculating a weight factor for synchronizing a transmission yield.

Provided is a Weighted DESYNC based cross-layered resource allocation method. The method includes, with respect to each of a plurality of nodes constituting a routing path, calculating a link quality value with the next node, receiving a link quality value from at least one neighbor node, and based on the link quality values in the calculating of the link quality value and the receiving of the link quality value, calculating a weight factor for synchronizing a transmission yield.

[OBJECT] To provide a network system which makes it possible to reduce the occurrence of a delay in data packet transfer processing even if periodic processing occurs.

[ORGANIZATION] In a network system having a plurality of communication devices 10-1 to 10-5, the communication devices each include: an executing means (control part 12) that executes periodic processing whose processing occurs periodically; and an adjusting means (control part 12) that adjusts an execution timing at which the periodic processing is executed by the executing means, according to states of the other communication devices.

[OBJECT] To provide a network system which makes it possible to reduce the occurrence of a delay in data packet transfer processing even if periodic processing occurs.

[ORGANIZATION] In a network system having a plurality of communication devices 10-1 to 10-5, the communication devices each include: an executing means (control part 12) that executes periodic processing whose processing occurs periodically; and an adjusting means (control part 12) that adjusts an execution timing at which the periodic processing is executed by the executing means, according to states of the other communication devices.

A buffer capacity of a memory is reduced and the occurrence of useless communication is prevented. A network system can include a communication device as a transmission source, a communication device as a transmission destination, and an intermediate communication device disposed between the transmission-source communication device and the transmission-destination communication device, the intermediate communication device having a function of connecting sub-networks which construct communication routes based on route construction protocols independent of each other, the network system characterized in that the intermediate communication device includes: a route establishing means (control part) that establishes a route to the transmission-destination communication device when a packet addressed to the transmission-destination communication device is received from the transmission-source communication device; and a proxy reply means (control part) that replies as a proxy for the transmission-destination communication device to the transmission-source communication device when the route is established by the route establishing means.