Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.

Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.

Abstract: A communication apparatus plurally using the same and different types of lines, wherein the upper limit of a communication charge as calculated per hour from the upper limit of a predetermined monthly communication charge is compared with an actual communication charge as calculated per hour from the time that has passed since the start of a connection and from the number of transmitted/received packets as determined by a communication terminal, and if the actual communication charge exceeds the upper limit of the communication charge, then the packet transmission amount is reduced when using a line for which the charge increases with amount of packets; or alternatively the communication is disconnected when using a line for which the charge increases with time.

Abstract: There is provided a technique for ensuring that the order in which a terminal, when performing a three-party handover, receives packets is the same as the order in which a transmission terminal transmits those packets. When a terminal device successively handovers among a plurality of radio base station routers, a radio base station router serving as an anchor during the handovers buffers packets addressed to the terminal device, and forwards those packets by switching between a tunnel between a radio base station from which the terminal device moves out and the anchor radio base station and a tunnel between the anchor radio base station and a base station to which the terminal device moves.

Abstract: Upon receiving a mobile communication control signaling at the time when a mobile terminal 80 makes or receives a call, VPN gateway 100, which serves as a relay node, performs reception determination in cooperation with policy server 200 serving as a bandwidth control mechanism within LAN 20 which is a private network. When permitting the reception, the VPN gateway 100 provides a communication line to the mobile terminal 80 or a pre-shared key is dynamically generated between a radio base station and radio network controller 70, and the pre-shared key is notified to the VPN gateway 100 by the radio network controller 70.

Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.

Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.

Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.

Abstract: There is provided a radio access communication system capable of shortening a communication interruption time period even if no radio-base-station control station exits when a radio terminal is handed over from a radio base station to another. An AP #1 (2a) to which a radio-terminal (1) is connected before a handover of the radio terminal (1) transfers, before the handover, a communication context directly to an AP #2 (2b) to which the radio terminal (1) is to be connected after the handover. At the handover of the radio terminal (1), the AP #2 (2b) has already held the communication context required for communication with the radio terminal (1).

Abstract: A radio terminal device informs a radio base station of entrance into a communication suppress mode such as a power saving mode by transmitting a state transition informing packet to the radio base station, when detecting deterioration of a communication. The packet received by the radio base station in this state is retained by the radio base station. When receiving an acknowledgment signal from the radio base station, the radio terminal device changes the setting of a receiver to a radio channel different from a radio channel used in the communication with the radio base station, and searches for other radio base stations.

Abstract: Header information is stored in a data register through an external interface, branch condition information including a classification order is stored in a branch condition register and information about a combination of fields of classification conditions to be applied is stored in a combination register. A conversion circuit and a sequencer extract only a necessary field from header information to generate a search key based on the branch condition information and the combination information. A CAM controller conducts search processing for a CAM by using the search key. The sequencer determines whether there exists packet classification to be executed next based on a search result and the branch condition information.

Abstract: A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.