摘要:
A wireless communication system (100) comprises a plurality of access points (102) for communicating with a plurality of wireless communication devices (104) within an enterprise (106). A local gateway (108) provides access to a local network (110) within the enterprise and an access point gateway (114) is coupled to the local gateway (108) and is communicably coupled to each of the plurality of access points (102) and to a core network (116) of the wireless communication system. The access point gateway (114) is arranged to receive control messages sent between the core network (116) and the plurality of access points (102) via the access point gateway (114) and to selectively route data via at least one of a communication path (118) between the access points (102) and the core network (116) and a communication path (120) between an access point (102) and the local network (110) via the local gateway (108) based on a received control message. A method of routing data and a method of handing over a wireless communication device, having an established data connection to a local network, is also claimed and disclosed.
摘要:
A wireless communication system (100) comprises a plurality of access points (102) for communicating with a plurality of wireless communication devices (104) within an enterprise (106). A local gateway (108) provides access to a local network (110) within the enterprise and an access point gateway (114) is coupled to the local gateway (108) and is communicably coupled to each of the plurality of access points (102) and to a core network (116) of the wireless communication system. The access point gateway (114) is arranged to receive control messages sent between the core network (116) and the plurality of access points (102) via the access point gateway (114) and to selectively route data via at least one of a communication path (118) between the access points (102) and the core network (116) and a communication path (120) between an access point (102) and the local network (110) via the local gateway (108) based on a received control message. A method of routing data and a method of handing over a wireless communication device, having an established data connection to a local network, is also claimed and disclosed.
摘要:
A system and method for communicating over networks, particularly generally-linear networks such as a netowrk of railcars in a railway train. The disclosed system and method include the relaying of packets which may contain plural messages down a line of nodes. Acknowledgement of the packets is obtained implicitly by listening to a subsequenct relay of the packet and retransmission of the packet is effected on a diverse antenna in the event of non-acknowledgement. Message bandwidth is shared among the nodes of the system by a message priority system and by the reservation of portions of a packet for certain types of messages. Message bandwidth is also shared by the use of groups of nodes as relay particpiants and by periodically changing the group which is peforming the relay operations.
摘要:
A redundant sensor system for predicting railway hazards including breaks in each rail, the location of the breaks, and determining when a railway vehicle has a flat wheel. Vibration sensors are distributed along both rails of a railway. Each sensor has a detection band at least within the sensing range of adjacent sensors and it is positioned such that the sensor detects vibration in both the horizontal and vertical axis of the rail. A central processor evaluates the data from these sensors and identifies the rail break, the location of the break, and the flat wheel.
摘要:
A system including an implantable delivery device having a housing, a reservoir, fill and catheter access ports, and a denial device. The housing maintains the fill port in fluid communication with the reservoir. The catheter access port includes a septum between an inlet and a well. The denial device includes a pin, a biasing element, and a solenoid. The pin is arranged to be movable between a first position in which the pin blocks passage of a needle into the well and a second position, with the biasing element biasing the pin to the first position. The solenoid is operatively coupled to the pin and provides an energized and de-energized states; in the energized state, the solenoid moves the pin from the first position to the second position to permit access to the well. An external controller effectuating clinician control over operation of the denial device is also provided.
摘要:
A communication system sorts packets or messages at a base station such that differential delays and absolute delays are reduced, further resulting in less needed memory at the packet selector and reduced jitter. The sorting is based on a packet identifier that is associated with each packet or message, which packet identifier includes data specific to the packet.
摘要:
A multiplexing scheme creates multiplexed PPP packets and demultiplexes the multiplexed PPP packets to reduce packet overhead. A point to point protocol packet communication apparatus such as a suitably programmed processing device or other suitable structure includes a point to point protocol packet header compressor (600) (and/or decompressor) having an input that receives point to point packets (601), such as original UDP packets, and an output that outputs compressed PPP packets (602). The apparatus includes a PPP packet multiplexer (and/or demultiplexer) (603) operatively coupled to the output of the PPP packet header compressor (600), and operative to create a frame (604) containing at least: multiplexed PPP packets from the plurality of PPP packets (606, 608 and 610), PPP multiplexed identification data 614 and PPP packet delimitation data (612). To demultiplex the multiplexed PPP packets at a receiving end, a method and apparatus includes evaluating PPP packet delimitation data from the frame containing multiplexed PPP packets, PPP multiplexed identification data and PPP packet delimitation data; and demultiplexing the frame based on the PPP packet delimitation data to obtain separate PPP packets.
摘要:
A patient controlled, implantable drug infusion system for administering medicine including a system for administering analgesia to a patient that allows the patient to control the analgesia infusion rates within limits prescribed by a physician for that particular patient. Also disclosed is a closed loop patient feedback system for administering drug therapy including a device and method that links information pertaining to a patient's physical assessment and activity level with a particular drug therapy.
摘要:
During reception of a higher-layer packet, segmented into lower-layer frames, a receiver will appropriately determine if a lower-layer frame was correctly received. If a lower-layer frame is not correctly received, and the maximum number of NAKs have been sent, the lower-layer frame is categorized as aborted. Once a frame has been categorized as aborted, the receiver determines an RLP frame corresponding to the higher layer packet boundary, sets V(N) to a next missing link-layer frame after a higher-layer packet boundary and pushes frames up to V(N) to the higher layer.
摘要:
Drug infusion system capable of delivering a fluid medication to a patient and method for doing same. An implantable drug delivery device is capable of delivering the fluid medication at a programmable rate to the patient under control of an original programming cycle having a plurality of steps in a plurality of time slots beginning at a starting time. The programming cycle specifies the programmable rate for each of the plurality of steps. An external controller is capable of storing a program representative of the original programming cycle in the implantable drug delivery device at a programming time. The drug infusion system adjusts the implantable drug delivery device so that the original programming cycle will begin at a time during the original programming cycle adjusted for the programming time.