摘要:
An ATM switch capable of preventing the network resource from being wasted during the occurrence of an overcrowding condition. In the ATM switch, both a message type and a processing mode are stored in correspondence to the connections. When the discarding of a cell occurs, the connection to which the discarded cell belongs is set to a discard mode by a cell discard controlling circuit, and each cell constituting the same message as that of the discarded cell out of the subsequent cells is discarded, and when a demarkation of the message has been detected, the processing mode is returned to a transfer mode, whereby the subsequent received cells are transferred in a normal manner. Thus, the cell which has become useless for a reception terminal is discarded in the network.
摘要:
A system is provided for building, operating, and managing a virtual network which integrates the configuration, the operation, and the management of plural information devices connected to a network. The system includes agents for operating, and managing information devices in the respective devices, a physical manager for building, operating, and managing the information devices, and a logical manager for logically building, operating, and managing the information devices. The agent operates to control the settings and the change of the information device in which the agent is mounted and communicates the information with the physical manager. The physical manager operates to manage the agent of each information device and communicates the information with a user and the logical manager. The logical manager operates to build, operate, and manage the directory services, the users, and so forth and, when these directories and user are newly set or changed, to communicate the information about the new settings and the change with the physical manager.
摘要:
A communication system in which an availability of communication resources to be used by a first base station module and a second base station module of a communications apparatus is managed. In one embodiment, the communication resources are shared between first and second base station modules such that communication resources that are not being used by the first base station module are available to be used by the second base station module and vice versa.
摘要:
A node that manages a plurality of femto cells identifies the femto cells that use an identical scrambling code, transfers a relocation request from the macro/micro network of a moving source to the femto cells and obtains information from a correct moving destination to achieve inter-network mobility of the mobile station.
摘要:
A node that manages a plurality of femto cells identifies the femto cells that use an identical scrambling code, transfers a relocation request from the macro/micro network of a moving source to the femto cells and obtains information from a correct moving destination to achieve inter-network mobility of the mobile station.
摘要:
When a cell load becomes higher than a call setup threshold value for a first channel (CS channel), a second channel (PS channel) is changed into a channel having a low transmission rate. Consequently, the cell load is reduced and no cell loss occurs in the first channel. Therefore, the call loss rate of a first communication service is lowered. Simultaneously, a handover threshold value is higher than the call setup threshold value for the first channel so that a failure rate of handover is lowered.
摘要:
In a mobile communication system, when a connection necessary to provide a service supporting high-speed data communication referred to as an MBMS (Multimedia Broadcast Multicast Service) is configured on an Iu interface, contention with the other packet communication service is eliminated. As a logical connection established between an SGSN (Serving GPRS (General Packet Radio Service) Support Node) and a Radio Network Controller in a Core Network 10, a PS (Packet Switching processing) functional connection for an existing packet communication service and a connection for a new MBMS service offering high-speed data communication are provided separately and independently from each other. This eliminates the contention between different types of services of the PS service and the MBMS service to thereby enable executing processings of such different types of services without being conscious of mutual processings. In addition, release processing of the connection may be executed independently to each service, thereby eliminating processing complexity in the SGSN.
摘要:
A network connecting device 100 comprises a LAN I/F 130 for performing communications with a LAN, a N-ISDN I/F 170 for performing a connectionless transmission, and a ATM I/F 160 for performing a connection-oriented transmission. A plurality of networks having different transfer systems are separately used, and communication channels are switched as occasion demands. A connection table section 200 holds correspondence among individual communication channels. A channel setting control program section 500 allocates a communication channel for new communication data. A kicking-out program section 1300 makes a communication channel used for low-priority communication data available for high-priority communication data. A recovery program section 700 reallocates a communication channel for communication data that has changed a communication channel after completion of high-priority communications. Thus, during connecting the LAN with a wide area communication network, data packets currently under call setting control ca be prevented from staying, and line utilizing efficiency ca be increased.
摘要翻译:网络连接装置100包括用于与LAN进行通信的LAN I / F 130,用于执行无连接传输的N-ISDN I / F 170和用于执行面向连接的传输的ATM I / F 160。 分别使用具有不同传送系统的多个网络,并根据需要切换通信信道。 连接表部分200保持各个通信信道之间的对应关系。 频道设定控制程序部分500分配用于新的通信数据的通信信道。 踢出程序部分1300使用于可用于高优先级通信数据的低优先级通信数据的通信信道。 恢复程序部分700重新分配在高优先级通信完成之后改变了通信信道的通信数据的通信信道。 因此,在将LAN与广域通信网络连接的同时,可以防止当前正在进行呼叫设置控制的数据分组停留,并且可以提高线路利用效率。
摘要:
A power feed system for feeding power to an electric vehicle includes a motor driving circuit provided with a smoothing capacitor. The motor driving circuit is capable of preventing the smoothing capacitor from being discharged and has a comparatively short main current supply line to reduce unnecessary power loss. The motor driving circuit converts dc supply power into ac supply power to feed the ac supply power to a motor. The motor driving circuit includes the smoothing capacitor and a plurality of semiconductor switching devices, which are built in the motor. An electromagnetic relay is placed within a case housing the motor driving circuit and the electromagnetic relay is controlled to supply a main current to the motor driving circuit and to interrupt the supply of the main current to the motor driving circuit.
摘要:
A main switch with a low withstand voltage usable to prevent a leak current from flowing from a floated running power supply by way of the main switch even when the insulation between the main switch and the body grounding is reduced. A running power supply for supplying power to a running motor, which includes a plurality of batteries connected in series to each other, is kept in the floating state with respect to the body grounding. Moreover, there is provided a step-down DC-DC converter of an input-output insulation type. A diode and a main switch are provided from a battery constituting part of the running power supply in this order to supply a starting power or starting signal to the DC-DC converter for starting the DC-DC converter. Thus, power is supplied to the input side of the DC-DC converter from the running power supply, to obtain a step-down accessary power supply VB.