Abstract: According to an embodiment, a wireless communication apparatus includes a plurality of wireless devices configured to perform wireless communication using an identical frequency band. Each of the wireless devices includes a transmitting circuit, a receiving circuit, and a coexistence arbitrating circuit. The transmitting circuit is configured to transmit a wireless signal. The receiving circuit is configured to receive the wireless signal. The coexistence arbitrating circuits of the wireless devices arbitrate each other to determine the wireless device to which wireless communication priority is given. While a priority wireless device is in a transmission state or in a reception state, in each of the wireless devices that is in the transmission state other than the priority wireless device, the coexistence arbitrating circuit suspends operation of at least part of the transmitting circuit, or lowers an amplification factor of at least part of the transmitting circuit.

Abstract: The radio transmitting apparatus includes a first initial phase value setting circuit that sets, in the first modulator, an initial value of the phase of the first modulated signal, which is a value at the start of the modulation according to the first modulation scheme. The radio transmitting apparatus includes a second initial phase value setting circuit that sets, in the second modulator, the phase stored in the phase storing circuit as an initial value of the phase of the second modulated signal, which is a value at the start of the modulation according to the second modulation scheme. The radio transmitting apparatus includes a signal gathering circuit that selects and outputs the first modulated signal output from the first modulator and then selects and outputs the second modulated signal output from the second modulator.

Abstract: The radio transmitting apparatus includes a first initial phase value setting circuit that sets, in the first modulator, an initial value of the phase of the first modulated signal, which is a value at the start of the modulation according to the first modulation scheme. The radio transmitting apparatus includes a second initial phase value setting circuit that sets, in the second modulator, the phase stored in the phase storing circuit as an initial value of the phase of the second modulated signal, which is a value at the start of the modulation according to the second modulation scheme. The radio transmitting apparatus includes a signal gathering circuit that selects and outputs the first modulated signal output from the first modulator and then selects and outputs the second modulated signal output from the second modulator.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: An information communication scheme for enabling the radio base station to carry out both point-to-point user information communications and point-to-multipoint user information communications with respect to radio terminals is disclosed. A first media access control identifier is allocated to a radio terminal which made a connection request, a correspondence between the first media access identifier and the radio terminal is broadcast, and a user information destined to the radio terminal is transmitted using a time-slot corresponding to the first media access control identifier. On the other hand, a second media access control identifier is allocated to a multicast information identifier, a correspondence between the second media access control identifier and the multicast information identifier is transmitted, and the multicast information is transmitted using a time-slot corresonding to the second media access control identifier.

Abstract: A communication scheme for improving the performance of communications utilizing the transport layer connection provided via a radio network, by enabling a control of the transport layer connection according to the radio communication state and property of the radio terminal, without changing implementation of the transport layer of a terminal connected to a wire network. The gateway device is provided with a control unit for controlling a connection in the radio transport layer protocol according an information regarding a radio communication state of the radio terminal device, where the information regarding the radio communication state of the radio terminal device is notified from either a radio base station device covering a radio service area in which the radio terminal device is located or a home location register for carrying out at least registration and management of the radio terminal device.

Abstract: A radio terminal capable of effectively utilizing push type distribution information is disclosed. The radio terminal is formed by a reception unit configured to receive push type distribution information from a radio base station, a location recognition unit configured to carry out a recognition related to an area in which the radio terminal is located, and a reception control unit configured to determine whether or not to receive the push type distribution information according to a recongition result of the location recognition unit, and control the reception unit according to a determination result.

Abstract: A mobile supporting router device for realizing the handoff control associated with the moving in high speed is forms by at least one first interface connected with radio base stations, each capable of accommodating at least one mobile terminal; at least one second interface connected with a wire network; an information exchanging unit for exchanging a routing protocol on a network layer, through the second interface; a memory unit for storing information regarding a routing on the network layer based on the routing protocol exchanged by the information exchanging unit; a transfer unit for transferring datagram through the first interface according to the information regarding the routing on the network layer stored in the memory unit; a moving detection unit for detecting a moving of the mobile terminal among the radio base stations; and an information updating unit for updating the information regarding the routing on the network layer stored in the memory unit when the moving of the mobile terminal is dete

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.

Abstract: An information communication scheme for enabling the radio base station to carry out both point-to-point user information communications and point-to-multipoint user information communications with respect to radio terminals is disclosed. A first media access control identifier is allocated to a radio terminal which made a connection request, a correspondence between the first media access identifier and the radio terminal is broadcast, and a user information destined to the radio terminal is transmitted using a time-slot corresponding to the first media access control identifier. On the other hand, a second media access control identifier is allocated to a multicast information identifier, a correspondence between the second media access control identifier and the multicast information identifier is transmitted, and the multicast information is transmitted using a time-slot corresonding to the second media access control identifier.

Abstract: An information communication scheme for enabling the radio base station to carry out both point-to-point user information communications and point-to-multipoint user information communications with respect to radio terminals is disclosed. A first media access control identifier is allocated to a radio terminal which made a connection request, a correspondence between the first media access identifier and the radio terminal is broadcast, and a user information destined to the radio terminal is transmitted using a time-slot corresponding to the first media access control identifier. On the other hand, a second media access control identifier is allocated to a multicast information identifier, a correspondence between the second media access control identifier and the multicast information identifier is transmitted, and the multicast information is transmitted using a time-slot corresonding to the second media access control identifier.

Abstract: A communication node which can reliably transfer a packet with a payload including data having error resistance in radio environments is disclosed. A packet to be transmitted is divided into segments to form a plurality of packet segments. From among a plurality of error correction schemes that have been prepared in advance, the scheme to be employed is selected for each of the packet segments in accordance with predetermined criteria, and the selected error correction scheme is applied to each packet segment. Subsequently, the processed packet segment is transmitted to the network. Packet segments are received from the network. From among a plurality of error correction schemes prepared in advance, the scheme to be employed is selected for each of the received packet segments based on predetermined information contained in each received packet segment, and the selected error correction scheme is applied to the received packet segment.

Abstract: A radio terminal capable of effectively utilizing push type distribution information is disclosed. The radio terminal is formed by a reception unit configured to receive push type distribution information from a radio base station, a location recognition unit configured to carry out a recognition related to an area in which the radio terminal is located, and a reception control unit configured to determine whether or not to receive the push type distribution information according to a recongition result of the location recognition unit, and control the reception unit according to a determination result.

Abstract: A communication node which can reliably transfer a packet with a payload including data having error resistance in radio environments is disclosed. A packet to be transmitted is divided into segments to form a plurality of packet segments. From among a plurality of error correction schemes that have been prepared in advance, the scheme to be employed is selected for each of the packet segments in accordance with predetermined criteria, and the selected error correction scheme is applied to each packet segment. Subsequently, the processed packet segment is transmitted to the network. Packet segments are received from the network. From among a plurality of error correction schemes prepared in advance, the scheme to be employed is selected for each of the received packet segments based on predetermined information contained in each received packet segment, and the selected error correction scheme is applied to the received packet segment.

Abstract: A radio terminal capable of effectively utilizing push type distribution information is disclosed. The radio terminal is formed by a reception unit configured to receive push type distribution information from a radio base station, a location recognition unit configured to carry out a recognition related to an area in which the radio terminal is located, and a reception control unit configured to determine whether or not to receive the push type distribution information according to a recognition result of the location recognition unit, and control the reception unit according to a determination result.

Abstract: A wireless base station which controls joining of a plurality of wireless terminals to a wireless network, s stores a maximum joining possible terminal number which indicates a maximum number of the wireless terminals of each terminal type that can join the wireless network simultaneously, and which is set in advance for each one of a Plurality of terminal types that classify the wireless terminals, and a currently joining terminal number which indicates a number of the wireless terminals of each terminal type that are currently joining the wireless network, for each one of the plurality of the terminal types. Then, the wireless base station judges whether the joining of one wireless terminal of one terminal type which sent a request message to the wireless network is permitted or not, according to the maximum joining possible terminal number for the one terminal type and the currently joining terminal number stored for the one terminal type.