Abstract: A method and onboard unit for radio communication between a radio beacon and an onboard unit with a transceiver as part of a road toll system, wherein the radio beacon has a limited radio coverage area and the onboard unit has two operating modes, i.e. a first energy-consuming working mode and a second energy-saving resting mode, and can be changed from the resting mode to the working mode by a signal received from the radio beacon.

Abstract: Electronic toll management includes capturing an image of a vehicle triggered by a transaction event representing an interaction between the vehicle and a facility, determining a vehicle identifier based on the captured image, checking whether the vehicle identifier matches a vehicle identifier provided by a party, and notifying the party of an occurrence of a match.

Abstract: An alarm apparatus includes a first camera facing a first direction of a road, a second camera facing a second direction of the road, a first output device facing the first direction of the road, a second output device facing the second direction of the road, a processor, and a storage unit including a detecting module and a controlling module. The detecting module stores a first instruction executed by the processor, thereby the processor receives the images captured by the first and the second cameras and determines what is the state of the road condition. The controlling module stores a second instruction executed by the processor, thereby the processor controls the first and the second output devices to send out appropriate alarming signals.

Abstract: The invention relates to a vehicle treatment installation with a drive-in area for a vehicle to be treated, a treatment gantry that can move along a drive-in direction, and at least one camera for creating an image of the drive-in area and vehicle. Such known vehicle treatment installations often fail and/or are maintenance-intensive. The task of providing an installation and also a method for its operation that simplifies, with simple means, the drive-in process into the correct treatment position for the driver of a vehicle to be treated is achieved by a display device that is visible to the driver of the vehicle during the drive-in process, and at least one mark. The subject matter of the invention is also a method for the operation of the vehicle treatment installation.

Abstract: Electronic toll collection for a motorist and/or subscriber having a wireless mobile device that links the device to (a) specific vehicle(s) and billing account(s) with a service provider(s), third party(s) and or toll authority(s). When a motorist having the mobile device in the vehicle approaches and passes a “virtual” toll location(s) and/or “virtual” toll barriers(s) and/or “virtual” toll boundary(s) having a given toll a central server determines whether the motorist and/or subscriber has activated an electronic ETC service associated with the mobile device, and sends a charge transaction from the central server to a service provider(s), third party(s) and/or directly to the toll authority(s) system. After every transaction, a confirmation (which may be SMS or text, vibration, voice, audible alert, email, etc.) is sent to the mobile device and/or subscriber indicating the amount paid and the status of the account.

Abstract: Exemplary methods, systems and components enable selective control of an operational mode for a vehicle that is subject to an administrative standard. In some instances a qualified person or entity may attain a possible consequential result related to a user-selected vehicle operation mode that may involve a vehicle operation paradigm and/or a vehicle travel route and/or a vehicle travel destination. In some embodiments, implementation of the selected vehicle operation mode may modify a conformity status of the vehicle relative to the administrative standard. Various accessible records may be maintained regarding administrative compliance states and their respective benefits, as well as regarding certification of preferable consequential results available to qualified recipients based on a correlated vehicle operational mode.

Abstract: An electronic toll collection transponder containing an orientation sensor for measuring the orientation of the transponder is described. The transponder measures its orientation and stores orientation data in memory. The transponder may report the stored orientation data as part of a response signal sent to the ETC system in reply to a trigger or polling signal. The transponder may assess whether it is correctly oriented based on a comparison of the orientation data to ranges or thresholds and may output an indicator of incorrect orientation or may disable communications with the ETC system during incorrect orientation.

Abstract: A backscatter passive wireless control system and method employs frequency coding using frequency components generated from an interrogating field using a passive nonlinear element such as a diode in a passive transponder tag. In particular, InterModulation Distortion (IMD) frequency components may be generated which are shifted in frequency from the interrogating signal to assist in backscatter detection at a receiver but are still in band, e.g., in an ISM band. The shifted frequency components may be swept or stepped over a range and passive elements in the tag encode a tag ID by selecting specific frequencies to be backscattered. A manually operated switch may couple an antenna to the transponder to allow battery free control.

Abstract: An automatic identification apparatus includes a control module configured as an integrated component of a vehicle and an electrical power interface receptive to a power signal from the vehicle. The electrical power interface provides electrical power to the control module. The automatic identification apparatus also includes an antenna electrically connected to the control module. The antenna transmits a radio wave indicative of a unique identification. The antenna is configured as an integrated component of the vehicle and is located to communicate the radio wave external of the vehicle. The automatic identification apparatus further includes a memory interface assembly configured as an integrated component of the vehicle. The memory interface assembly is receptive to a memory device encoded with the unique identification. The memory interface assembly communicates the unique identification to the control module when the memory device is received in the memory interface assembly.

Abstract: An adaptive communication system and method for use in an electronic toll collection system utilizing transponders located in vehicles travelling on a toll roadway. A transponder memory stores configuration type data that identifies the type of the vehicle carrying the transponder, the transponder or the transponder's mounting. The transponder transmits the configuration type data to the communication system. The communication system includes a memory which contains a database of predetermined communication parameters for various types of configuration types. The communication system looks up the predetermined communication parameters for the configuration type and adjusts variable communication parameters accordingly. Predetermined communication variables may include the transmit power of an antenna, or the receive sensitivity of the antenna or the position of the vehicle in order to maximize the likelihood of a successful communication.

Abstract: A method of planning the movement of plural trains over a train network utilizing route protection for the route immediately ahead of a train to avoid undesirable changes to the planned route of the train.

Abstract: The application discloses using multiple wireless vehicular sensor nodes to wirelessly receive multiple, time-interleaved vehicular waveform reports from the nodes. Each vehicular waveform report approximates a raw vehicular sensor waveform observed by a magnetic sensor at the node based upon the presence of a vehicle. The vehicular waveform reports are products of this wirelessly receiving process. The application discloses apparatus supporting the above outlined process. The vehicular waveform reports may be time synchronized.

Abstract: Sensor nodes are disclosed that act like inductive loops to detect the presence and/or movement of vehicles on at least one roadway. Processors are disclosed using at least one sensor node to communicate vehicle detection that is statistically compatible with the inductive loop response to the vehicles. Installation may configure at least one of the sensor nodes to implement the inductive loop compatibility. Sensor clusters of sensor nodes installed in a roadway may act as inductive loops. Computer readable memories, installation devices and/or servers may deliver a program system and/or a Finite State Machine (FSM) configuration to implement the compatibility and/or an installation package to install the program system and/or the FSM configuration.

Abstract: A vehicle tracking system and method of tracking vehicles in multiple traffic lanes is disclosed. One system includes an RFID reader including a plurality of antenna ports. The system also includes a first antenna connected to a first antenna port of the plurality of antenna ports, the first antenna oriented toward a first lane of traffic. The system further includes a second antenna connected to the first antenna port and oriented toward a second lane of traffic. The system also includes a third antenna connected to a second antenna port of the plurality of antenna ports, the third antenna oriented toward the first lane of traffic. In some cases, the RFID reader is configured to detect the existence of a vehicle in a lane based on detection of an RFID device associated with the vehicle at two or more of the plurality of antenna ports.

Abstract: A road-vehicle communication system enabling resumption of the transmission/reception from the rest of data between the vehicle and the road if the transmission/reception is interrupted. Specifically, the road-vehicle communication system includes a roadside apparatus for distributing a content and a vehicle-mounted device which can play a distributed content, the roadside apparatus is connected communicatively with the vehicle-mounted device, and a series of contents are distributed from the roadside apparatus to the vehicle-mounted device. The roadside apparatus includes a control unit for determining a content which the roadside apparatus starts transmitting to the vehicle-mounted device, which is a communication party, from among the series of contents and distributing the other contents succeeding the determined transmission start content. Thus, if the transmission/reception of data between the road and vehicle is interrupted, the transmission/reception can be resumed.

Abstract: A system and method for assisting drivers of Bomb Carts and Shuttle Carriers to position their vehicles appropriately for loading and unloading containers at a gantry crane. The system uses laser scanners mounted at various levels on the gantry crane sill beams to determine the type, position, orientation and skew angle of the vehicles as well as whether the vehicles are in a loaded or unloaded condition. In addition, the system provides indicator devices to direct drivers how to move their vehicles.

Abstract: A cell-based vehicle driving control system includes a local server for obtaining road environment information on roads within a cell and target vehicle information on a target vehicle within the cell and generating local waypoints based on the road environment information and the target vehicle information; a global server for monitoring the target vehicle information, the road environment information and local server information on the local server received from the local server; and a vehicle control terminal, mounted in the target vehicle, for receiving the local waypoints from the local server and controlling the target vehicle based on the local waypoints. The road environment information is obtained by using at least one sensor installed on the roads.

Abstract: A cylindrical hollow body fence post disposed according to the present invention features a first closed-geometry longitudinally hollow inner profile inter-connected by at least two longitudinally extending bridging elements to a second closed-geometry longitudinally extending outer profile. The tubular post comprises one or more longitudinal housing for receiving illuminating elements. Said illuminating elements are powered by a solar panel. Said longitudinal housings receiving said illuminating elements are closed by longitudinal coverings providing a dovetail connection with the open end of said housings. The invention further proposes a method of traffic signalization according to which road signalization is improved on sites where a road portion curves to a direction is visually emphasized by blinking or color changing fence posts.

Abstract: A traffic control system for converting an intersection into a roundabout during periods of heavy traffic includes a mechanism for monitoring traffic flow through the intersection and about the roundabout. The system also includes a concave opening in and around the intersection and a concrete disc disposed in the cavity, a hydraulic lift is constructed and arranged to elevate the concrete disc above the level of the road and lights provided to alert motor vehicles to enter a roundabout defined by the elevated disc. The system also includes traffic lights for alerting a motor vehicle operator to drive onto the disc or around the disc to use the intersection and/or roundabout.

Abstract: There is disclosed a single space parking meter that includes a low powered radio for communicating with a mobile access point. There is also provided a parking meter management system comprising a single space parking meter and a mobile access point. The mobile access point comprises a coin collection cart, and a mobile data collection terminal including a wireless radio for communicating with the wireless radio of the single space parking meter. Also disclosed is a method of managing single space parking meters comprising the steps of collecting and storing meter information in a single space parking meter, receiving at a main electronics board of the single space parking meter a transmit signal, and transmitting the meter information to a mobile access point using a low powered radio of the single space parking meter.

Abstract: A road traffic control system is applied to an intersection to control traffic and includes a light support, three traffic lights, a speed measuring device, a light controller, and an alarm. The light support is installed at one lane at the intersection; the three traffic lights are installed on the light support to control traffic. The speed measuring device is installed on guardrails on the lane to measure current speed of vehicle. When one of the traffic lights changes its color to indicate stopping, the light controller synchronously controls the speed measuring device to detect the current speed of the vehicle that is passing through the speed measuring device, and compares the measured speed of the vehicle with a preset speed limit. The alarm outputs warning signals when the measured speed is above the preset speed limit.

Abstract: A system and method for predicting the location of a vehicle in an electronic toll collection system employing a wide area communication protocol. The vehicle includes a transponder that sends reports regarding the position of the vehicle and the time at which the position was determined. The system includes a vehicle position predictor for estimating the future position of the vehicle within a roadway based on two or more reports of past positions and the times at which they were recorded. Speed data or other data impacting likely future position may also be reported and factored into the estimate. The estimate of future position may be used in connection with triggering enforcement measures, timing a toll transaction, integrating wide area toll communications into a legacy toll transaction system, or for other applications.

Abstract: There is disclosed a single space parking meter that includes a low powered radio for communicating with a mobile access point. There is also provided a parking meter management system comprising a single space parking meter and a mobile access point. The mobile access point comprises a coin collection cart, and a mobile data collection terminal including a wireless radio for communicating with the wireless radio of the single space parking meter. Also disclosed is a method of managing single space parking meters comprising the steps of collecting and storing meter information in a single space parking meter, receiving at a main electronics board of the single space parking meter a transmit signal, and transmitting the meter information to a mobile access point using a low powered radio of the single space parking meter.

Abstract: A collision warning device for motor vehicles includes a locating sensor, a lane recognition module for detecting the number of traffic lanes in the road on which the vehicle is traveling, and a decision unit to output a warning signal if a danger parameter (ttc) determined using the data from the locating sensor exceeds a threshold value, the threshold value being variable depending on the number of traffic lanes in such a way that the warning signal is issued earlier when the number of lanes is greater.

Abstract: An in-vehicle apparatus includes a first receiver capable of receiving identification information about a vehicle group that is transmitted from a first roadside device in a signal having directivity; a judging unit for identifying a vehicle group to which a host vehicle of the in-vehicle apparatus belongs based on the identification information; and a first transmitter capable of transmitting the identification information to a second roadside device connected to a network of a road traffic system.

Abstract: The invention relates to methods and apparatus for displaying toll charging parameters of vehicles by means of a roadside display. In one embodiment, parameters are sent from an onboard-unit of the vehicle to the roadside display. In an alternative embodiment, parameters are registered under a vehicle identification in a database and retrieved therefrom for displaying on the roadside display by a detection of the identification of the vehicle.

Abstract: A system includes a plurality of networked nodes spatially distributed within a monitored area and adapted to interact with a mobile entity entering and moving through the area, the plurality of nodes including at least one area entrance node adapted to detect the mobile entity upon entering the monitored area, and a transaction node for accomplishing a transaction with the mobile entity; a transaction processing center in communication relationship with the nodes for processing data required for the transaction and for providing the data to the transaction node. A node selection unit is adapted to dynamically select the transaction node among the plurality of nodes based on an estimation of the speed of movement of the mobile entity.

Abstract: A proximity information device includes a body, a radio frequency identification (RFID) integrated circuit (IC) supported by the body, and a threshold detector coupled to the RFID IC. The RFID IC is operative to transmit a response message in response to an interrogation signal if the threshold detector indicates that a detected magnetic and electric field and the relative strength of magnetic field compared to the electric field satisfy a predetermined threshold.

Abstract: Provided is a system and method for providing vehicle parking information using a navigation satellite. The system includes: a monitoring unit for photographing an image of a vehicle parking space and transmitting the image to a parking space checking unit; the parking space checking unit for checking a vacant parking space based on the transmitted vehicle parking space image and transmitting vacant parking space acquisition information to a location information computing unit; and the location information computing unit for creating and transmitting location information of the vacant parking space, which is vehicle parking information, to a navigation satellite based on own location information acquired based on navigation information transmitted from an external navigation satellite and the transmitted vacant parking space acquisition information.

Abstract: The invention relates to an apparatus for a regional or global navigation satellite system that includes an arrangement for receiving additional data or navigation messages from the navigation satellite system, and an arrangement for informing or alarming the user that critical atmospheric conditions occur, whereby the additional data or the navigation messages include atmospheric information.

Abstract: A road-vehicle communication system warns or gives caution to a vehicle traveling in a reverse way direction and may also give warning to vehicles traveling in a correct direction. The road-vehicle communication system includes a first roadside apparatus at an entrance gate that gives entry gate pass information indicating that a vehicle passing a communicative area has entered a toll road. A second roadside apparatus at an exit ramp acquires any given entry gate pass information from a passing vehicle. An administration device judges whether or not the entry gate pass information is acquired from the passing vehicle. If the entry gate pass information is not acquired, the second roadside apparatus provides the vehicle with reverse-way driving warning information for warning the vehicle that the vehicle is traveling in the reverse direction.

Abstract: Test method for optimizing the collection of tolls from vehicles on toll roads of a road network, which is carried out by a vehicle-mounted position-determining unit and a vehicle-external management unit which has a data connection to the latter, the toll roads of the road network having detection zones superimposed on them in an electronic image of the road network and the vehicle-mounted position-determining unit transmitting toll-related data to the management unit when vehicle positions are determined within the detection range.

Abstract: A traffic light system includes a traffic light unit and at least one reminding unit. The traffic light unit includes a plurality of traffic lights, a detecting module connected to the traffic lights, and a wireless communication module connected to the detecting module. Each reminding unit includes a central processing unit (CPU) and a signaling module, such as a speaker module connected to the CPU. The detecting unit detects the working statuses of the traffic lights and generates corresponding detect signals transmitted to the wireless communication module, the wireless communication module sends the detect signals to the reminding unit in a predetermined reminding area, the CPU processes the detect signals to obtain the workings statuses of the traffic lights and controls the speaker module to play corresponding audio signals to remind the user.

Abstract: A solar-powered portable energy-saving light-emitting traffic sign has a main body, with its traffic sign surface provided with LED luminous bodies. A solar energy device is assembled onto the support bar of the main body, and has a photovoltaic panel and rack. A battery is assembled onto the support bar. A starting switch enables activation and manual highlighting of LED bodies on the traffic sign. A timer is assembled onto the support bar to set and control auto-off time of the LED bodies. A wireless transmitter for synchronous transmission control, is assembled onto the support, and composed of a wireless transmitting module and a wireless receiving module. The wireless transmitting module is activated by the starting switch to transmit a wireless starting signal. The receiving module is normally opened. When the wireless receiving module receives the starting signal, the LED bodies can also be highlighted.

Abstract: When multiple readers for RF transponders have to be placed in close proximity, such as in adjacent lanes of a highway toll barrier, they can be set to operate at different frequencies. When signals from two adjacent ones of the readers interfere, the resulting signal includes interference terms whose frequencies equal the sum of the reader frequencies and the difference between the reader frequencies. To remove such interference terms while passing the desired terms, a tag includes a low-pass or other frequency-selective filter.

Abstract: Mobile systems are provided for charging electronic toll collection accounts for parking fees. The systems are configured to wirelessly request and receive tag data from an electronic toll device. Some embodiments include a vehicle and a boom, some embodiments include a handheld device, and other embodiments include combinations thereof. Methods of charging an electronic toll payment system are also provided. A mobile scan system wirelessly requests and receives tag data from an electronic toll device on a customer's vehicle which is checked for validity, and then an electronic toll collection account is charged a fee for parking.

Abstract: A vehicle drivers behavior monitoring and reporting information system. This system includes a receiver that receivers information from traffic control device transmitters for traffic control devices, a processor to process information from the transmitters as well as determine traffic violations committed, a transmitter to transmit data to appropriate local authorities, an ID scanner to identify the operator of any traffic violations committed.

Abstract: A system and method for triggering a vehicle inspection in a vehicle inspection bypass system. A handheld device transmits a signal containing the driver information in response to detecting an activation of an actuator on the handheld device. A vehicle mounted transponder detects the signal when the handheld device is in close proximity, and the driver information is stored in the transponder memory. Upon detecting an interrogation signal from a roadside reader, the transponder transmits a signal containing the driver information to the roadside reader. Based on the received driver information, a roadside controller determines whether a vehicle may bypass a vehicle inspection station.

Abstract: Methods, including service methods, articles of manufacture, systems, articles and programmable devices are provided for randomly setting a travel fee. A usage attribute of vehicle traffic travelling upon a toll thoroughfare is observed and compared to a threshold. As a function of comparing the attribute to the threshold, a plurality of different toll rates are randomly assigned to each of a plurality of vehicles, each of the vehicles either travelling upon the toll thoroughfare or potentially entering the toll thoroughfare. An occupant of a vehicle is notified of a toll rate randomly assigned, and fees or credits associated with travel by the occupant's vehicle are charged (levied or awarded) at the randomly assigned toll rate.

Abstract: A communications system for a vehicle user is provided. The system comprises a portable receiver which the vehicle user can easily carry on his or her person. The portable receiver is capable of receiving coded transmissions from a vehicle-mounted transmitter which is capable of activating a function in a portable transceiver.

Abstract: A transponder of an interrogator and toll highway system has a non-electronically activated switch for a first state in which the transponder is in an “active” mode and a second state in which the transponder to be in an “inactive” mode. A non-electronic hanging device hangs the transponder in a vehicle for receiving interrogating signals and a non-electronic activator causes the switch to be in the first state only when the transponder is placed within the hanging device, and to be in an “inactive” mode when the transponder is not placed within the hanging device.

Abstract: There is disclosed a single space parking meter that includes a low powered radio for communicating with a mobile access point. There is also provided a parking meter management system comprising a single space parking meter and a mobile access point. The mobile access point comprises a coin collection cart, and a mobile data collection terminal including a wireless radio for communicating with the wireless radio of the single space parking meter. Also disclosed is a method of managing single space parking meters comprising the steps of collecting and storing meter information in a single space parking meter, receiving at a main electronics board of the single space parking meter a transmit signal, and transmitting the meter information to a mobile access point using a low powered radio of the single space parking meter.

Abstract: The double-deck covered roadway (5) has an upper road (30) for light vehicle traffic and a lower road (25) for heavy, industrial vehicle traffic. The roadway is an intelligent system, having an access control computer (ACC) (55) limiting access of the roadways to the appropriate vehicles. Signal emitters, receivers and/or repeaters (40) for microwave, cell phones short-range radio, or the like may be provided. The roadway is covered, and has a slanted roof structure (7). Solar panels (10) are disposed atop the slanted roof structure (7). Spindles (8) may be provided that can pull off or pull on an optional protective cover for the solar panels (10). An indoor services module (50) houses the ACC (55) and other service systems. The underside of the upper roadway (30) can provide attached or embedded monitoring systems, road lighting, signal light boards (60) to communicate with drivers, etc.

Abstract: The present disclosure is directed to determining speeds of radio frequency tags. In some implementations, a method includes sampling a Radio Frequency (RF) signal from an RFID tag at a plurality of different times as the RFID tag approaches an RFID reader and recedes from the RFID reader. A phase of the RF signal is determined for each of the plurality of different times based, at least in part, on the sampled RF signal. A speed of the RFID tag is determined based, at least in part, on the determined phase for the sampled signal for each of the plurality of different times.

Abstract: The invention relates to a road gantry comprising a horizontal beam (2), the upper surface (21) of which constitutes a passageway for service personnel to cross, the gantry being characterised in that it comprises arms (25) for bearing apparatuses (30) for monitoring road traffic, electronic toll collection, or signaling, wherein said arms are pivotably attached to the horizontal beam so as to be able to move from a first position, in which the arms extend towards the road, into a second position for stowage on said passageway, and vice versa. The passageway may comprise protection guardrails (22, 23) in which openings (24) are formed, said openings being shut by door panels (24) arranged so as to enable the passage of said arms (25) from said first position to said second position and vice versa. The invention also relates to a barrier-free electronic toll collection station including at least one such gantry.

Abstract: The present invention provides a method and system for determining a toll charge for vehicles traveling on a toll lane that includes determining a change in traffic flow for vehicles traveling on the toll lane, determining a change in traffic speed for vehicles traveling on the toll lane, and determining the toll charge for vehicles traveling on the toll lane using a weighting approach that weights the change in traffic flow with a first factor and weights the change in speed with a second factor, the first factor depending on whether the change in traffic flow is increasing or decreasing, and the second factor depending on whether the change in speed is increasing or decreasing.

Abstract: This application discloses using multiple wireless vehicular sensor nodes to wirelessly receive multiple, time-synchronized vehicular waveform reports from the nodes to create a time synchronized system report, and preferably a time synchronized vehicular report. Each vehicular waveform report approximates a raw vehicular sensor waveform observed by a magnetic sensor at the node based upon the presence of a vehicle. The vehicular waveform reports, the time-synchronized system report, and the time synchronized vehicular report are products of this wirelessly receiving process. Also disclosed are apparatus supporting the above outlined process. Reception of the vehicular waveform reports may be time interleaved.

Abstract: In an electronic toll collection system, card data of a payment card is stored in an on-board unit mounted in a vehicle. Toll data necessary for a toll collection transaction including the card data is copied from the on-board unit to a cellular phone. A user passes the cellular phone to a tollgate attendant, and the toll data is moved to a toll collection unit installed at a tollgate. The toll collection unit calculates a toll fee based on the toll data and generates a delete command and road use data. When the tollgate attendant passes a portable terminal of the toll collection unit to the user, the delete command and the road use data are copied to the on-board unit. The toll data is deleted from the on-board unit by the delete command, and the road use data is reported to the user.

Abstract: A communication apparatus for use in a vehicle includes a transmission repeater, a transmission terminator and a re-number unit. In a wireless communication between the communication apparatus and a communication unit in a facility such as a toll collection booth or the like, the transmission repeater transmits transmission data to the communication unit repeatedly until receiving an acknowledgement of reception completion of the transmission data from the communication unit, and the transmission terminator terminates repeated transmissions of the transmission data by the transmission repeater when a number of the repeated transmissions of the transmission data reaches a standard value. Further, the re-number unit changes the number of the repeated transmissions of the transmission data based on a content of the transmission data from the communication unit.

Abstract: A communication apparatus is provided in which only a terminal having a specific positional relationship can perform communication through a relatively simple arrangement. When initial setting is performed or communication is started, a timing calculator calculates a time difference corresponding to the difference between a path from a first antenna to a terminal and a path from a second antenna to the terminal, based on a transmission signal from the first antenna and a reflection signal provided by having the transmission signal reflected from the second antenna or a communication partner, i.e. the terminal, and returned back to the first antenna. Based on the time difference thus calculated, the timing calculator outputs a signal for regulating the transmission timing of transmission data from the first antenna to a variable delay unit.