Abstract: The present invention allows transmission power control for each packet without increasing overhead and control processing delay in communications control systems such as CDMA systems, thereby increasing the quality of transmission. The present invention provides a communications control system for controlling packet communications between a base station and a mobile station, including a determiner for determining the transmission power level of packet data based on the received intensity of a preamble signal transmitted in advance of transmission of the packet data or a reservation signal, a reservation signal transmitter for transmitting to the base station information regarding the amount and type of subsequent packet data as the reservation signal in parallel with transmission processing of the packet data, and a packet data transmitter for obtaining information regarding the determined transmission power level at the mobile station and transmitting the packet data based on the obtained information.

Abstract: A timeslot selection method is provided. The timeslot selection method includes the steps of: obtaining a propagation loss; receiving an occupation state and an interference amount of an uplink timeslot; obtaining a desired wave power from the propagation loss; obtaining a ratio between the desired wave power and the propagation loss for the uplink timeslot in which the occupation state is idle; and selecting the transmitting timeslot by using the ratio. In addition, a timeslot assignment method in which there are a plurality of TDD boundaries each of which is a boundary between at least an uplink timeslot and at least a downlink timeslot in a frame is provided. Furthermore, a timeslot assignment method is provided, in which assignment is carried out according to a service class included in a QoS request.

Abstract: For realizing a mobile communication network highly compatible with the Internet and improving channel efficiency and battery conservation in a mobile communication system including a plurality of base stations connected to IP network, a plurality of mobile stations locating in a cell formed by base station, and a server, connected to the IP network, for managing location information of the mobile stations, wherein a set of cells constitutes a paging area, whereas the server manages information of a standby mobile station as location information of mobile stations about paging area in which mobile station locates; the server determines whether a mobile station is in standby state or not when a base station transfers to the server a packet addressed to the mobile station and, if the mobile station is in the standby state, copies the packet by the number of the base stations corresponding to the paging area related to the mobile station and multicasts thus copied packets.

Abstract: To provide a service with fairness by providing QoS of approximately an equal degree among users of the same service class to keep fairness of the service as well as by maintaining a transmission rate at a predetermined ratio among users of different service classes to relatively keep QoS among service classes.

Abstract: One preferred embodiment of the invention provides a wireless base station which provides a multicasting service to simultaneously transmit identical data to a plurality of wireless terminals. A wireless base station is connected to a plurality of wireless terminals and provides a multicasting service for a plurality of wireless terminals. The wireless base station determines autonomously whether it provides the multicasting service for the plurality of wireless terminals. Another preferred embodiment of the invention provides a method of selecting a wireless base station for a wireless terminal, the wireless base station providing a multicasting service for the wireless terminal. When the wireless terminal can receive the same multicasting information from a plurality of wireless base stations, the wireless terminal selects one of the plurality of wireless base stations so as to make the number of the wireless base stations that send the same multicasting information as small as possible.

Abstract: A system controlling the traffic balance between the paging of incoming calls and a location registration and including a plurality of base and mobile stations and a management server for location information of each mobile station. A set of cells formed by the base stations constitutes a first area group. Each mobile station shifts to a mode periodically receiving signals from the base stations if no signals are transmitted and received for a predetermine period. Each base station forms second to n-th area groups (n?2), each having an area smaller than that of the first area, to be used when the mobile stations are in idle state. Each mobile station selects the area group to register according to the period in which no packet is received and transmitted, and registers its location while specifying an area within this area group with respect to the server.

Abstract: The present invention improves receiving quality compared to the prior art even if instantaneous control of transmission power is not executed. A mobile station MS#0 measures signal level received from surrounding base stations and determines to which base stations it is to be connected in order to satisfy a desired downlink receiving quality (step S1). The mobile station MS#0 notifies a radio network control station RNC of the desired based stations to which the mobile station is to be connected (step S2). Upon receiving the notification from the mobile station MS#0, the radio network control station RNC duplicates a downlink transmitted signal for the mobile station MS#0, if any, and transmits it to the selected base stations (step S3). The mobile station MS#0 receives signals transmitted by the base stations (step S4) and synthesizes these signals (step 5), thereby satisfying the desired downlink receiving quality.

Abstract: A mobile-communications system is disclosed. The system includes a mobile station, a wireless-base station enabled to communicate with the mobile station, and a location-information management apparatus for managing a state of the mobile station in a network layer upper to a link layer for managing wireless-communications resources. The mobile station is provided with wireless-communications means for transmitting and receiving a signal with the wireless-base station in an active state in the link layer for managing the wireless-communications resources, discontinuous-receiving means for discontinuously receiving a control signal from the wireless-base station in the link layer in a state different from the active state, and state-management means for creating a state-transition signal in response to a paging signal included in the control signal.

Abstract: A base station and a scrambling code setting method of automatically setting up a scrambling code for the base station to use are offered. The base station includes: a scrambling code setting unit for setting up a base station identifier and a provisional downlink scrambling code that is provisionally assigned; and a transmitting unit for spectrum-spreading the base station identifier by the provisional scrambling code, and for transmitting the base station identifier; wherein the scrambling code setting unit assigns a lasting downlink scrambling code based on a report concerning reception of the base station identifier.

Abstract: A base station is disclosed. The base station includes: a service area status determination unit configured to determine status of a service area of the base station based on received signals from mobile stations; a total transmission power determination unit configured to determine status of total transmission power of the base station based on total transmission power of surrounding base stations; a transmission power determination unit configured to determine transmission power of a common control channel of the base station based on the status of the service area and the status of the total transmission power; and a transmission power setting unit configured to set the transmission power determined by the transmission power determination unit.

Abstract: An object of the invention is to make improvement in the configuration of location registration areas. When a base station 13P is newly installed in a location registration area 30A, the base station 13P recognizes a location of its own with GPS or the like and performs communication with a plurality of surrounding base stations 13Q to select a location registration area 30A to which it should belong, based on the belonging status of the surrounding base stations 13Q and the location of its own.

Abstract: A base station for use in a multi-network connection communication system and its connecting method are provided, wherein the base station is connectable simultaneously to a carrier network and a private network. The base station comprises a section for making a decision as to whether a terminal is to be connected to a carrier network or a private network, and a section for connecting the terminal to the carrier network or the private network in accordance with the decision result.

Abstract: Terminal management information concerning a plurality of communication terminals of a user is managed. When a call addressed to the user is initiated, one or more terminals that can accept the call is identified by referring to an ability needed for a communication involved in the call and the terminal management information concerning the plurality of communication terminals managed by the step (a). Information involved in the call into items of information to be sent to the above one or more terminals identified by the step (b) and combining items of information from the above one or more terminals identified by the step (b) is separated into information to be sent to one of the plurality of communication terminals that initiates the call. A virtual terminal is formed by the above one or more terminals identified by the step (b) and communicates with the above one of the plurality of communication terminals.

Abstract: A packet communication method of performing communication employing a packet having a transmission-source address and destination address, comprises the steps of: making a predetermined number of bits of the transmission-source address and a predetermined number of bits of destination address be fixed addresses; a repeating node for repeating a packet from a transmission-source terminal first converting the fixed address of the transmission-source address of the received packet into an address of an higher-rank station of the repeating node; and the repeating address converting the fixed address of the destination address of the received packet into an address of an higher-rank station of a last repeating node for a destination terminal, and transferring the packet.

Abstract: A mobile node having two or more interfaces, a control method of the mobile node, and a mobile node control program are disclosed. The mobile node includes a generating unit to generate control information for each interface, an information providing unit for providing the control information provided by each interface to an upper layer, and a routing controlling unit to perform at least one of determining connectivity, and updating a routing based on the provided control information.

Abstract: A mobile host 2 as an embodiment of the invention comprises a data link layer connection establishment notification unit 202 for notifying the network layer that a connection to a link layer in the data link has been established during a Dormant state; a router information requesting unit 203 for transmitting, in response to the notification by the data link layer connection establishment notification unit 202, a router request signal which requests for transmission of router advertisement information to the access router 3 existing on the access link 4 to which the mobile host is connected; and a network layer movement detection unit 204 for detecting a default router, based on the router advertisement information returned from the access router 3 in response to the router request signal.

Abstract: A communication apparatus is disclosed, which includes an information collection unit, a storage unit, a selection unit, and a route control unit. The information collection unit is configured to collect route information and condition information. The storage unit is configured to store the route information and the connection information. The selection unit is configured to select a connection apparatuses for a terminal apparatus based on the route information and the connection information. The route control unit is configured to control routes from the communication apparatus to the connection apparatus.

Abstract: A mobile node (400) capable of establishing an ad hoc network routing is disclosed. The mobile node comprises a transmitting/receiving unit (426) for communicating with other communication unit and a routing request generator (422) for generating a routing request message for requiring an ad hoc network routing. The mobile node further comprises: an address storage (427) for storing an address of the mobile node (400) and an address of a receiving node; a random number generator (430) for generating a random number; a certificate issuing unit (440) for issuing a certificate of the mobile node (400); a digital signature creator (450) for creating a digital signature of the mobile node (400); and a controller (424) for transmitting/receiving the routing request message accompanied by the address of the mobile node, the address of the receiving node, the random number, the certificate and the digital signature via the transmitting/receiving unit, according to an ad hoc network protocol.

Abstract: The present invention improves a system capacity and satisfaction rate with a quality of service in packet communications performed through a radio link established between a transmitting station and a receiving station by dynamically limiting transmission power of packets in the transmitting station and keeping an increase of an interference level in the receiving station, which belongs to another cell, within a TPC margin. The present invention includes a resource allocator 115 configured to set transmission power of packets in a next step period, by use of transmission power of packets in a preceding step period (slot) and an interference level of the receiving station.

Abstract: Efficient paging control is achieved in a communication system that selectively provides one of communication services implemented by integrating a plurality of communication systems. Before transmitting a downlink signal to a terminal, a gateway requests each of the communication systems to transmit a paging signal to the terminal. Receiving the paging signals transmitted from the communication systems, the terminal selects a communication system A with the lowest communication cost in accordance with communication cost information contained in the paging signal. The terminal sends a request for connection to the selected communication system A. As a result, the communication system A transmits the downlink signal to the terminal.