Abstract: An adjustable strand threading and lubricating device for prefabricated box girders includes an underframe. Multiple first spline shafts are rotatably installed between left and right side walls of the strand threading boxes. The first openings are respectively located above the first spline shafts, first sliding blocks are respectively provided and configured to slide up and down in the first openings, multiple second spline shafts is rotatably installed between two first sliding blocks, and axes of the second spline shafts are parallel to the first spline shafts. The first spline shafts and the second spline shafts are slidably provided with multiple strand threading units for threading steel strands, a lubricating unit is arranged on a front side of the strand threading units, and a bundling unit is arranged on a rear side of the strand threading units.

Abstract: A removal-facilitated anchor sealing device for box girder construction is provided and includes a base; wheels are mounted below the base; a forward direction of the wheels is designated as a front side; a main box body is arranged on a top surface of the base in a manner of sliding back and forth; an interior of the main box body is divided into anchor sealing chambers from bottom to top through separation plates; a front side of each anchor sealing chamber is opened; anchor sealing units are arranged in the anchor sealing chamber in sequence in a left-right direction; a spraying unit is arranged below the anchor sealing units; working ends of the anchor sealing units and working end of the spraying unit extend out of the anchor sealing chamber from the front side; a storage unit is arranged on a top surface of the main box body.

Abstract: A cell relay switch includes an output port for transmitting cells to multiple destinations. The output port further includes a queuing buffer, a controller, and an output processor. The buffer receives a plurality of cells of a packet from a source. The buffer temporarily stores the cells before transmission by the output processor. The controller controls the storing of the received cells in the buffer by determining a total number of the cells in the packet and a number of cells to be received from different packets, deciding whether the buffer contains sufficient space to store the received cells based on the total number of cells in the packet, the number of cells to be received from the different packets, and the rates at which cells are received and drained from the buffer. The buffer is commanded by the controller to store the received cells when the buffer contains sufficient space and discard the received cells when the buffer contains insufficient space.

Abstract: A network gateway includes at least one processor, at least one communication channel coupled to the at least one processor, and software that controls communication by the processor over the communication channel. The software has at least two modes of operation: a first mode that provides information over the at least one communication channel and a second mode that allows modification of at least a portion of said software according to data provided to the gateway. Upon powering up, the software may operate in the second mode for a predetermined amount of time. In response to receiving a first particular signal, the software may remain in the second mode to modify at least a portion of the software. The data may be provided to the gateway over the Internet.

Abstract: The invention provides systems and methods for allowing internetwork data transfers to mobile data devices. In particular, the invention includes systems for internetworking a CDPD network system with an Internet protocol network, and more particularly with a Mobile Internet Protocol Network. In one aspect, the invention can be understood as systems that allow mobile computing systems to negotiate the exchange of data across two disparate networks by providing within at least one of the networks a system that redirects the destination of data packets in order that the redirected data packets get forwarded to the changing locations of the Mobile Computing system. In another aspect, the invention can be understood as systems that allow a Mobile computing system to negotiate the exchange of data across disparate networks by providing a redirecting element within one of the networks that will redirect data packets destined for that mobile computing system to the transient location of the computing element.

Abstract: A method and system for communicating a packet over a cell relay satellite network, without establishing a connection in the cell relay satellite network, comprises the steps of segmenting the packet into a number of segments at a source node in the communications network, generating for each of the segments a fixed size cell that includes a cell header and a payload with a prefix, a downlink beam locator, and a source node identifier included in the cell header, and inserting each segment into the payload of each generated cell, respectively, and transmitting the cells to the cell relay satellite. A cell relay satellite receives each transmitted cell from the source node, and broadcasts each cell on a downlink beam corresponding to the downlink beam locator in each cell header. A destination node receives each broadcasted cell on the downlink beam, and re-assembles the packet from the received cells.

Abstract: The invention provides systems and methods for allowing internetwork data transfers to mobile data devices. In particular, the invention includes systems for internetworking a CDPD network system with an Internet protocol network, and more particularly with a Mobile Internet Protocol Network. In one aspect, the invention can be understood as systems that allow mobile computing systems to negotiate the exchange of data across two disparate networks by providing within at least one of the networks a system that redirects the destination of data packets in order that the redirected data packets get forwarded to the changing locations of the Mobile Computing system. In another aspect, the invention can be understood as systems that allow a Mobile computing system to negotiate the exchange of data across disparate networks by providing a redirecting element within one of the networks that will redirect data packets destined for that mobile computing system to the transient location of the computing element.

Abstract: A method and system for communicating a packet over a cell relay satellite network, without establishing a connection in the cell relay satellite network, comprises the steps of segmenting the packet into a number of segments at a source node in the communications network, generating for each of the segments a fixed size cell that includes a cell header and a payload with a prefix, a downlink beam locator, and a source node identifier included in the cell header, and inserting each segment into the payload of each generated cell, respectively, and transmitting the cells to the cell relay satellite. A cell relay satellite receives each transmitted cell from the source node, and broadcasts each cell on a downlink beam corresponding to the downlink beam locator in each cell header. A destination node receives each broadcasted cell on the downlink beam, and re-assembles the packet from the received cells.

Abstract: Mobility in a wireless ATM network is accomplished by use of hand-off control protocols. A mobile terminal signals a first base station that a hand-off is to occur. In a first preferred embodiment the first base station signals a second base station requesting a hand-off. After the second base station signals the first base station that a datapath link is available from a hand-off switch to the second base station, the hand-off switch causes the datapath to change from the first base station to the second base station and the first base station signals the mobile terminal to commence communication with the second base station. In a second preferred embodiment, the mobile terminal signals a first base station that a hand-off is to occur. The first base station signals a second base station requesting a hand-off. At the same time a datapath link is established between the first and second base stations.

Abstract: A data link control procedure for wireless ATM access channels based on a dynamic TDMA/TDD framework provides integrated ATM services including available bit-rate (ABR) data and constant/variable bit-rate (CBR/VBR) voice or video through the addition of wireless-specific medium access control and data link control protocol layers between the physical and ATM network layers. Generally, a data link control is used to insulate the ATM network layer from wireless channel impairments by selective retransmission of erroneous or lost cells before they are released to the ATM layer. The data link control methods disclosed use the on-demand ABR burst transmission capability of the dynamic TDMA channel to retransmit unacknowledged cells in available slots not allocated to service data. Specific error recovery procedures for both (asynchronous) ABR and (isochronous) CBR services are provided.

Abstract: A medium access control (MAC) layer protocol is used in a wireless ATM system for integrated support of ATM services, including constant bit-rate (CBR), variable bit-rate (VBR) and available bit-rate (ABR) services. The MAC protocol supports both connectionless packet and connection-oriented virtual circuit modes, with appropriate service parameter and quality-of-services selection. A dynamic time division, multiple access/time division multiplex (TDMA/TDM) approach accommodates the service classes in an integrated manner. A supervisory MAC procedure integrates ATM ABR/VBR/CBR virtual circuits, providing burst-by-burst allocation of ABR cells and call-by-call allocation of VBR and CBR bandwidth parameters. A mechanism is provided for the dynamic allocation of subframe capacities, assignment of ABR slots based on desired queueing rules, assignment of VBR slots based on ATM traffic shaper parameters and assignment of CBR slots based on bandwidth requirements.