Abstract: A push-type information service to a client located within a local network and having only a local IP address becomes possible via a network address converting apparatus. A network address conversion program implementing the network address converting process may be stored on a storage medium. When assignment of an Internet IP address to a client is requested by a host server, an IP address assigning unit assigns an Internet IP address to that client. An address conversion table producing unit produces an address conversion table describing the correspondence between the Internet IP address assigned to the client and the local IP address of the client. An address converter notifies the host server of the assigned Internet IP address. After that, if the host server sends data to the acquired Internet IP address, the address converter converts the destination of the data to the corresponding local IP address of the client by referring to the address conversion table.

Abstract: A radio communication apparatus which uses one of phase shift keying (PSK), differential phase shift keying (DPSK), or quadrature amplitude modulation (QAM), and in which frequency synchronization is achieved based on calculated phase difference data associated with a received signal at time intervals shorter than symbol intervals. The radio communication apparatus includes a frequency synchronization control unit for correcting a frequency of a reference signal used to achieve frequency synchronization in accordance with a mean value of the phase difference data calculated over a period of time in which two or more symbols are input.

Abstract: A mobile wireless method and apparatus and wireless communication system wherein a receiving unit receives a radio signal, a PLL unit demodulates the radio signal, a storage unit stores channel information of a base station wireless apparatus and electrical field intensity information, a first data analyzing unit obtains a destination of received data and stores it in the storage unit, a second data analyzing unit obtains channel information of another base station wireless apparatus and stores the channel information in the storage unit, and an electrical field intensity measuring unit measures the electrical field intensity of the signal received by the receiving unit and stores the corresponding electrical field intensity data in the storage unit. The base station wireless apparatus transmits channel information to which an index in accordance with a distance to another base station wireless apparatus is added. Program instructions for implementing the method are stored in a computer readable medium.

Abstract: To realize real-time information distribution and a server that reliably delivers information to a mobile terminal and a push-type control method for an information monitoring device. The push-type function server of this invention accumulates information to be distributed and identifier information of destination terminal devices; obtains address information of a terminal device from a home radio server that manages the terminal device according to the identifier information, and transfers distributed information to a radio server connected to a destination terminal device based on the address information, and the information monitoring device monitors whether or not data to be distributed to a specified terminal device have been delivered to other information-storing severs.

Abstract: A method, system and computer readable medium for a wireless radio communication processing unit capable of, when setting or changing a communication frequency to be used in one of base station wireless radio units, setting a frequency which does not interfere with communication frequencies being used in other base station wireless radio units. In the wireless radio communication processing unit, when a power supply is turned on, when the unit is reset, or a fault detection section detects a fault resulting from an interfering wave or the like in a communication area of the base station wireless radio unit, a station information requesting section inquires for a channel being used in a base station wireless radio unit that a different wireless radio communication processing unit manages.

Abstract: A mobile wireless system, method and apparatus for establishing a link between a terminal device and the Internet by communicating with a base station wireless apparatus of a wireless communicating apparatus having at least one wireless serve connected to the Internet and the base station wireless apparatus that is connected to the wireless server for performing wireless communication. Under a condition in which the mobile wireless apparatus can communicate with multiple base station wireless apparatuses, when the base station wireless apparatus, which communicated with the mobile wireless apparatus, currently communicates with another mobile wireless apparatus, the mobile wireless apparatus communicates with another base station wireless apparatus obtained by selecting from among a plurality of other base station apparatuses, which are located in neighboring communication areas of the base station wireless apparatus and have available communication links.

Abstract: A mobile wireless method and apparatus and wireless communication system wherein a receiving unit receives a radio signal, a PLL unit demodulates the radio signal, a storage unit stores channel information of a base station wireless apparatus and electrical field intensity information, a first data analyzing unit obtains a destination of received data and stores it in the storage unit, a second data analyzing unit obtains channel information of another base station wireless apparatus and stores the channel information in the storage unit, and an electrical field intensity measuring unit measures the electrical field intensity of the signal received by the receiving unit and stores the corresponding electrical field intensity data in the storage unit. The base station wireless apparatus transmits channel information to which an index in accordance with a distance to another base station wireless apparatus is added. Program instructions for implementing the method are stored in a computer readable medium.

Abstract: A mobile wireless method and apparatus and wireless communication system wherein a receiving unit receives a radio signal, a PLL unit demodulates the radio signal, a storage unit stores channel information of a base station wireless apparatus and electrical field intensity information, a first data analyzing unit obtains a destination of received data and stores it in the storage unit, a second data analyzing unit obtains channel information of another base station wireless apparatus and stores the channel information in the storage unit, and an electrical field intensity measuring unit measures the electrical field intensity of the signal received by the receiving unit and stores the corresponding electrical field intensity data in the storage unit. The base station wireless apparatus transmits channel information to which an index in accordance with a distance to another base station wireless apparatus is added. Program instructions for implementing the method are stored in a computer readable medium.

Abstract: A wireless server system and method for communicating between a user terminal and Internet a wirelessly. It is based on a user terminal having a fixed terminal and a terminal unit so that an Internet connection can be made by way of the terminal unit to an appropriate wireless server. The system has at least one wireless server connected to Internet; and a plurality of wireless station devices connected to the wireless server, and the system communicates wirelessly with the terminal unit of the user terminal; wherein one wireless server within a district of communication range of the wireless station devices is designated as a home server for the terminal unit, and the fixed terminal receives data sent wirelessly from Internet by way of the terminal unit.

Abstract: A mobile unit database server and a mobile radio router are provided to enable to process data as well as a plurality of communication terminals in one grouping without using telephone lines. The mobile unit database server is used in a communication system having at least one radio server connected to a network, and a radio base station communicating using radio signals with the mobile radio router connected to the radio server and to more than one terminal. The mobile unit database server is provided with: a mobile unit information database storing mobile unit information that associates identifiers and/or FQDNs and/or mobile FQDN of said mobile radio router with the identifiers and/or FQDN and/or IP address of the terminal connected to the mobile radio router, and are stored as mobile unit information; and mobile unit managing devices for renewing mobile unit information in response to a request to register mobile unit information sent from the radio server.

Abstract: The present invention provides a communications system that includes a plurality of networks connected to a global network and having as essential components, for each network, at least one routing server and a radio base station connected to the one routing server to communicate using radio signals with one mobile radio unit connected to a terminal or a host, and, when one mobile radio unit or a host connected to one network is transmitting data to another mobile radio unit connected to another network, and if a destination address resolution is required, a communications system managing server responds to a destination address resolution request transmitted from the one mobile radio unit or the host, and transmits an IP address allocated to the other mobile radio unit by the currently connected routing server to the one mobile radio unit or the host.

Abstract: A digital communication method and system wherein in response to input 3-bit data, a phase and amplitude of a carrier signal are controlled so that a symbol at a given time is located at one of allowed signal points depending on the content of the symbol. The allowed signal points include six signal points where a phase shift equal to .+-..pi./4, .+-.2.pi./4, or .+-.3.pi./4 occurs relative to the signal point at which the immediately previous symbol was located and where the amplitude is equal to a first level, and also include two signal points where a phase shift equal to .+-.2.pi./4 occurs relative to the signal point at which the immediately previous symbol was located and where the amplitude is equal to a second level lower than the first level. The digital communication method and system allows for a transmitter which does require a high-performance power amplifier, and a simplified receiver circuit.