摘要:
The present invention relates to a method for selecting another access network when transmitting data from a content server to a terminal in a multi access network environment comprising a discontinuous coverage radio access network. According to the present invention, the method comprises the step of: Upon detection of a request from a network selection controller to switch from a discontinuous coverage radio access network to another access network, sending a message to an access controller of said discontinuous coverage radio access network comprising cached data informing it to forward said cached data to said another access network.
摘要:
The present invention relates to a method for providing services from a content server to a terminal belonging to a discontinuous coverage network, said terminal moving from a first radio coverage zone to a second radio coverage zone over a zone of non radio coverage, said discontinuous coverage network architecture comprising access controllers and radio access points each pair of access controller and radio access point defining a radio coverage zone. According to the present invention, the method comprises the step of: Sending in advance from a first access controller data in a cache memory of at least one radio access point of said second radio coverage zone, when said terminal is outside the coverage of said second radio coverage zone.
摘要:
The present invention relates to a method for selecting another access network when transmitting data from a content server to a terminal in a multi access network environment comprising a discontinuous coverage radio access network.According to the present invention, the method comprises the step of: Upon detection of a request from a network selection controller to switch from a discontinuous coverage radio access network to another access network, sending a message to an access controller of said discontinuous coverage radio access network comprising cached data informing it to forward said cached data to said another access network.
摘要:
A method of transmitting data between a content server (11) and a terminal (17) belonging to a discontinuous coverage network, the terminal (17) moving from a first radio coverage area (14, 161) to a second radio coverage area (14, 162) over an area (14a) comprising no radio coverage. The method includes: terminating (100) one or more protocols used by the content server (11) for the data transmission with the terminal (17) within a proxy, wherein the proxy is seen as the entry point of the discontinuous coverage network by the content server (11), and using a caching mechanism provided within the discontinuous coverage network for forwarding (200) data from the proxy to the terminal (17).
摘要:
The invention relates to a method of operating a radio communications network (100), wherein data is transmitted from a base station (10) of said network (100) to a terminal (20) via a radio link (15). The inventive method is characterized in that data to be transmitted from said base station (20) to said terminal (20) is transmitted in advance to said terminal depending on current data transmission conditions of said radio link (15) and stored to a cache memory (21) of said terminal (20).
摘要:
The invention consists in an equalization system with two sections, one at each end of a transmission channel. The section at the transmission end adds control signals to information signals to be transmitted over the line. The section at the reception end generates control signals identical to those added at the transmission end and in phase with the control signals received over the transmission channel, which are separated from the received information signals by means of a first transversal filter with controllable weighting coefficients, the reciprocal transfer function of the transmission channel being synthesized from the locally generated and the received control signals by means of a second transversal filter with controllable weighting coefficients, equalization being achieved by means of a third transversal filter with the same design and same weighting coefficients as the second transversal filter. The invention is applicable to the transmission of data over telephone lines.
摘要:
The present invention relates to a method for providing services from a server to a terminal over a mobile/wireless communication network. According to the present invention, the method comprises the steps of: sending messages from said server to an access node of said mobile/wireless communication network; extracting at said access node the payload from said message and storing it in a cache memory, including in the message a label identifying the location of said payload in said cache memory, forwarding said modified message to the terminal, downloading from the terminal said payload from said cache memory upon detection of appropriate radio conditions.
摘要:
A switching element for cross-connect equipment for digital bit streams multiplexed by time-division multiplexing of digital bit streams at different bit rates includes, for each incoming frame transmission medium, a device for extracting from said incoming frames signals constituting multiplexing units to be cross-connected. It further includes for each incoming frame transmission medium a memory for signals constituting multiplexing units to be cross-connected adapted to hold at least N signals where N denotes the repetition period in the incoming frames of the lowest bit rate tributary of the multiplexing hierarchy. It further includes for each incoming frame transmission medium for a device for writing said memory synchronously with the extraction of said signals, at different addresses for signals constituting different multiplexing units to be cross-connected and at the same addresses for signals constituting the same multiplexing unit to be cross-connected, the frequency at which each address is rewritten being related to the repetition period in the incoming frames of the signals written at said address. It finally includes for each incoming frame transmission medium a device for reading said memory synchronously with the insertion into the outgoing frames of signals constituting multiplexing units to be cross-connected at addresses determined by said distribution law.
摘要:
A puffer SF6 circuit breaker comprises a pair of separable contacts with formation of a breaking gap, a piston-cylinder assembly to compress the gas when the movable contact is actuated to the open position, and a puffer nozzle designed to channel the gas outflow to the breaking gap so as to cool the arc by forced convection. The nozzle is totally or partially made of transparent or translucent insulating material to allow a part of the energy to be removed by radiation.
摘要:
A method for providing wireless broadband communication to a high-speed movable vehicle, in particular to a high-speed train (2), is described, said method comprising the steps of: Arranging Worldwide Interoperability for Microwave Access (WIMAX) base stations (6) along a route (1) the vehicle (2) moves along, Arranging Wireless Local Area Network (WLAN) hot spots (5) along the route (1) between said WIMAX base stations (6), Upon detection of a vehicle speed (vv) above a predefined speed threshold (vth) establishing a communication (10) to said vehicle (2) using said WLAN hot spots, Upon detection of a vehicle speed (vv) below said speed threshold (vth) establishing a communication to said vehicle (2) over said WIMAX base stations (6). Furthermore a communication network to be used to execute the method mentioned above, plus a computer program product causing a computer to perform said method is described.