Abstract: A packet routing apparatus that simultaneously implements prompt route recovery and continuation of communication by an optimal route. A radio reception section (103) receives a radio signal including packet data received in a transmission/reception antenna (101) via a circulator (102). Further, the radio reception section (103) detects disconnection of an adhoc network by a decrease in electric filed strength of a signal from a communicating party. A radio reception section (104) transmits a radio signal including a route search packet, route response packet or the like from the transmission/reception antenna (101) via the circulator (102). When the adhoc network is disconnected, a control section (105) performs processing of route recovery for transmitting a route search packet to a destination wireless adhoc terminal, while performing route reconstruction processing for reporting route disconnection to a transmission source wireless adhoc terminal.

Abstract: A packet routing method for quickly reorganizing a path from a transmission source terminal to a destination terminal. A radio receiver part (103) detects, from a decrease of the field intensity or the like, a cut-off of a communication with a communication device using a radio signal to directly transmit packets. A control part (105) determines whether the local terminal device including it is the packet destination radio terminal device or the packet transmission source radio terminal device. When it is determined that the communication with a communication device using the radio signal to directly transmit packets is cut off and that the local terminal device is the transmission source radio terminal device, a radio transmitter part (104) broadcasts a request signal of path restoration addressed to the packet destination communication device.

Abstract: A radio communication device includes a reception unit for receiving a route request message from another radio communication device, a route control message processing unit for judging whether the received route request message is addressed to itself or not, a route request message management unit for deciding a delay amount for delaying response transmission or relay forwarding with regard to the route request message according to an operating state of the radio communication device when the route request message is not addressed to itself, and a delay processing unit which performs response transmission or relay forwarding to the route request message when the delay amount time has expired. Thus, a route selected giving preference to radio communication devices having a preferable operating state can be obtained.

Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.

Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.