Abstract: In a wireless positioning apparatus mounted in a moving body, feature point position information is stored in a reference trajectory storage, a reception state of transmitted waves from a wireless transmitter is detected, and a movement distance of the moving body is measured. A positioning trajectory is generated that indicates a correspondence relationship between the movement distance and the reception state of transmitted waves. A coincidence distribution is generated that indicates a correspondence between: a point on the reference trajectory to which a representative position, set arbitrarily within the positioning trajectory, corresponds for each coordinate shift value; and the degree of coincidence between the reference trajectory and the positioning trajectory. Based on the coincidence distribution, positioning information is generated. Reliability is determined based on an evaluation value reflecting a flatness of the coincidence distribution.

Abstract: A terminal device includes a communication state obtain unit that obtains a state of wireless communication, a travel locus information generation unit that generates travel locus information, a reference locus information obtain unit that obtains reference locus information, a measurement unit that obtains a position of a movable body along a travel direction based on a matching between the travel locus information and the reference locus information, a mismatch detection unit that detects at least one of (i) mismatch degree between the travel locus information and the reference locus information in the matching, and (ii) a cause of mismatch in the matching, and a filtering unit that filters at least one of the travel locus information and the reference locus information. The measurement unit performs the matching before the filtering, which increases the measurement accuracy of the terminal device.

Abstract: With the object of enabling data transfer between mobile routers without going through a home agent and establishing a connection to a destination mobile router even when mobile communication terminals equipped in the destination mobile router are changed at the time of initiating connection to the destination mobile router, a mobile router information management server has a mobile router registration information table that registers, for each mobile router, mobile router information that is reported from the mobile routers and that includes identification information of the mobile routers and identification information of mobile communication terminals equipped in the mobile routers, in response to inquiry information from a mobile router that includes identification information of another mobile router that is to be a communication destination, searches the mobile router registration information table, based on the identification information of the other mobile router, for mobile router information that in

Abstract: An apparatus installed on a host vehicle derives travel locus/condition information relating each of a plurality of reception positions on the vehicle to a corresponding reception condition (e.g., received signal strength), and updates the information at each of successive positions along a travel locus of the vehicle. The currently obtained information is compared with reference travel locus/condition information previously obtained by travel along a reference travel locus, in the same travel direction, by the host vehicle or similar vehicle. Degrees of similarity between the currently obtained information and the reference information are evaluated, and the results used to detect changes in position of the host vehicle along a direction at right angles to its advancement direction.

Abstract: A wireless position detection apparatus specifies, on a road, a target point corresponding to a current position correspondence point of a moving object and calculates a positioning coordinate of the target point as current position information of the moving object based on (i) position information of the current position correspondence point of the moving object on the coverage map, (ii) the position information of the auxiliary points positioned immediately prior to and immediately posterior to the current position correspondence point on the coverage, and (iii) the position data of the map objects corresponding to the auxiliary points positioned immediately prior to and immediately posterior to the current position correspondence point on the coverage map.

Abstract: A routing device of the present invention is included in a communication network capable of explicit routing which specifies resources included in a default path for each flow, and includes a detour path detection unit that detects a detour path which enables estimation of temporary transmission quality which can be provided to a flow within a detour region when at least a portion of an explicit default path of the flow transmitted by the routing device is detoured via resources included in a default path of another flow, and a routing unit that routes data of the flow at least to either one of the detour path and the default path, based on a difference between transmission quality of the detour path detected by the detour path detection unit and transmission quality of the default path.

Abstract: In a wireless communication system, a first wireless communication unit receives a first data including identification information associated with the first data transmitted from a third wireless communication unit; generates, when needed to share a specific time with a second wireless communication unit, a second data associated with a first reception time of the received first data; and transmits the second data and the identification information of the received first data. The second wireless communication unit calculates, upon reception of the identification information and the second data, if it is judged that the first data has previously been received based on the identification information, a time value needed to synchronize with the first wireless communication unit, based on a second reception time of the first data previously received and the first reception time of the first data associated with the second data transmitted from the first wireless communication unit.

Abstract: A wireless position detection apparatus specifies, on a road, a target point corresponding to a current position correspondence point of a moving object and calculates a positioning coordinate of the target point as current position information of the moving object based on (i) position information of the current position correspondence point of the moving object on the coverage map, (ii) the position information of the auxiliary points positioned immediately prior to and immediately posterior to the current position correspondence point on the coverage, and (iii) the position data of the map objects corresponding to the auxiliary points positioned immediately prior to and immediately posterior to the current position correspondence point on the coverage map.

Abstract: In particular embodiments, a method includes analyzing a binary decision diagram (BDD) representing a data stream from a sensor to determine a compression rate of the BDD and indicating a sensor malfunction in the sensor if the compression rate of the BDD deviates from a specified compression rate range.

Abstract: In a wireless communication apparatus, data transmitted from at least one wireless transmitter is received by direct wireless communication, and its wireless reception condition is detected. Relation reference information setting two or more relations between the wireless reception condition on a reception of transmitted data and location information of the transmitter is stored. Relative distance information of a relative distance between the transmitter and the apparatus is measured. Relation information indicating a relation between the wireless reception conditions and the relative distance information is generated. A relation between the location information and the relative distance information is determined by comparing the relation reference information and the relation information. A current location of the apparatus is determined on the basis of the relation between the location information and the relative distance information and a current wireless reception condition.

Abstract: In a wireless positioning apparatus mounted in a moving body, feature point position information is stored in a reference trajectory storage, a reception state of transmitted waves from a wireless transmitter is detected, and a movement distance of the moving body is measured. A positioning trajectory is generated that indicates a correspondence relationship between the movement distance and the reception state of transmitted waves. A coincidence distribution is generated that indicates a correspondence between: a point on the reference trajectory to which a representative position, set arbitrarily within the positioning trajectory, corresponds for each coordinate shift value; and the degree of coincidence between the reference trajectory and the positioning trajectory. Based on the coincidence distribution, positioning information is generated. Reliability is determined based on an evaluation value reflecting a flatness of the coincidence distribution.

Abstract: Provided is a communication node apparatus that can attempt optimal utilization of a communication resource of a communication interface mounted on each node apparatus. A communication node apparatus (transmission node apparatus 101) includes a plurality communication interfaces (transmission interfaces 201-1 and 201-2 and reception interfaces 202-1 and 202-2), enables communication that uses a plurality of communication paths with an opposing apparatus, and includes a means (reception interface aggregate calculation unit 204) for changing an aggregation of reception interfaces addressable as destinations for data to be transferred to the opposing apparatus via each of the plurality of transmission interfaces so as to maximize the communication performance using the plurality of communication paths simultaneously in response to a change in communication performance of each of the transmission interface and the reception interface.

Abstract: In a wireless communication system, a mobile communication apparatus judges the reception quality available at its current position for direct reception of information transmitted from a fixed wireless station, with the judgement based upon the current position and upon a reception quality map expressing a relationship between reception positions and corresponding reception quality values. If the reception quality at the current position is judged to be sufficient, direct reception is executed, while otherwise, a limitation is placed upon such direct reception, for example by postponing the direct reception until reaching a position at which the reception quality will be sufficient.

Abstract: A message notification system includes a message transmitting apparatus and a message receiving apparatus. In the message transmitting apparatus, transmission data including an acquired message is generated and transmitted. In the message receiving apparatus, the transmission data is received. When the transmission data is received, the message receiving apparatus notifies a receiving-side user of the message in the transmission data. The message transmitting apparatus sets whether nor a receiving-side user is to be re-notified of the message in the transmission data, and sets a re-notification condition for re-notification of the message.

Abstract: In order to enable to judge validity of a measurement result of a transmission rate, a speed estimation method transmits a data packet and probe packets before and after the data packet to a measured section which is a target for measurement of a transmission rate, estimates a transmission rate of a measured section based on a first receiving interval which is a receiving interval between the probe packets transmitted through the measured section just before and immediately after the data packet and a data volume of the data packet, and determines validity of a transmission rate by comparing a second receiving interval which is a receiving interval between the probe packets which have passed the measured section continuously in a state that a data packet does not exist in between them in a measured section and a first receiving interval.

Abstract: A link band estimating apparatus includes a packet transmitting unit for transmitting packets in succession via a route portion of communication routes which share a link to be measured. The apparatus includes a packet interval measuring unit for measuring an interval by which the packets are spaced apart in another route portion of the communication routes. The apparatus includes a band calculating unit for calculating the band of the link to be measured based on a value measured by the packet interval measuring unit and a data size of the packets.

Abstract: The present invention is provided to implement an automated setting change of network setting items on an ad hoc network which does not have a specific base station.

Abstract: A design support apparatus for determining a plurality of objective functions for modeling an object having a plurality of elements, each of the elements providing variable geometrical parameters, the design support apparatus includes a memory for storing the variable geometrical parameters and a processor for executing a process including: determining boundary information associated with specified geometrical parameters of the elements which indicate a state of contact between the elements, dividing the variable geometrical parameters into a plurality of groups on the basis of the boundary information, and determining the plurality of objective functions for each of the groups by using the variable geometrical parameters.

Abstract: A distributed resource managing system has one or more resource managing processes corresponding to each of predefined events that change the states of resources, on a communication network where each of a plurality of tasks can use a plurality of resources. Each of the one or more resource managing processes includes an assignor which, when it receives a request to protect any specific task against the event that changes states of resources to which its own process corresponds, assigns backup resources including a resource already selected by another resource managing process to the task in such a way that all tasks requested to be protected which use the resource can be protected from the event that changes the states of the resources, and an indicator which indicates information of the assigned backup resources to one or more recovery execution processes.

Abstract: In a wireless communication apparatus, data transmitted from at least one wireless transmitter is received by direct wireless communication, and its wireless reception condition is detected. Relation reference information setting two or more relations between the wireless reception condition on a reception of transmitted data and location information of the transmitter is stored. Relative distance information of a relative distance between the transmitter and the apparatus is measured. Relation information indicating a relation between the wireless reception conditions and the relative distance information is generated. A relation between the location information and the relative distance information is determined by comparing the relation reference information and the relation information. A current location of the apparatus is determined on the basis of the relation between the location information and the relative distance information and a current wireless reception condition.