149 results about "Foreign market" patented technology

A Packet Core Function (PCF) and method of consistently selecting a Packet Data Service Node (PDSN) from a plurality of PDSNs in a packet data network to host a data session for a Mobile Node (MN). In a first embodiment, a static lookup table in the PCF is used to associate a list of identifiers for MNs and a list of the plurality of PDSNs in the network. The PCF obtains an identifier for the MN and utilizes the lookup table and a hash function to associate the identifier for the MN with a PDSN. The PDSN is then selected by the PCF to host the data session for the MN. In another embodiment, the PCF also includes a cache timer and a cache memory that stores the identifier for the MN and the IP address of the selected PDSN for a predetermined time period following the handoff of the MN to another PCF. If the MN returns to the PCF within the predetermined period of time, the PCF reselects the same PDSN to host the data session. In another embodiment, following the initial selection of a PDSN to host the data session, the EP address of the PDSN is sent to the MN which then passes the IP address of the PDSN to any subsequent PCFs where the MN roams. A PDSN zone ID may be utilized in lieu of the fill IP address.

A gateway for mobile communications comprises a cache for storing network data recently downloaded from a network, a foreign agent, and a packet filter that directs requests for the network data from a mobile node to the cache. The packet filter directs the requested network data from the cache to the mobile node by way of the foreign agent, without forwarding the requested network data to a home agent of the mobile node.

There is provided a route optimization method in a mobile Internet Protocol (IP) system using a mobile Internet Protocol. When a mobile host (MH) moves over the Internet and is assigned to a care-of-address (CoA) corresponding to a changed point of attachment to the Internet, it sends a registration request message containing the care-of address to a home agent (HA) via a foreign agent (FA). The home agent stores the care-of address in relation to a domain name of the mobile host in an internal domain name server database. Upon receipt of a query about the mobile host by domain name from a correspondent node (CN), the home agent sends the care-of address corresponding to the domain name of the mobile host together with caching prevention information to the correspondent node. The caching prevention information is set to prevent the correspondent node or another domain name server from caching the care-of address of the mobile host. The correspondent node communicates with the mobile host using the care-of address.

The invention discloses a bogie for an A-type broad-gauge metro vehicle. The bogie comprises a frame, a wheelset and axle box device, a primary suspension device, a secondary suspension device, a central traction device, a foundation brake device, a driving device and a rim lubrication device. The bogie is characterized in that the frame has a large lateral span, the primary suspension adopts a rubber spring, the secondary suspension adopts an air spring, a secondary vertical damper and a horizontal damper to reduce vibration and impact, so that a passenger sits more conformably, two traction rods are adopted between a vehicle body and the bogie for transferring traction and braking force, and the foundation brake device adopts a wheel mounted type disc brake unit. The bogie meets requirements for a Brazil 1A metro project contract, and the bogie for the A-type broad-gauge metro vehicle, which meets requirements for a dual-mode signal system, is researched for the first time; the gauge is 1600 mm and the axle load is 17.5 tons; the bogie has the advantages of high operation quality and convenience for maintenance and can be widely applied to the foreign market.

The present comprises: a first coal dryer; a second coal dryer; and a third dryer, by removing moisture remaining inside and outside of coal, which is used for fueling thermal power plants, in the multiple coal dryers using reheat steam at a high temperature, incomplete combustion of coal can be prevented, thereby enhancing heat capacity of the coal, minimizing release of pollutants, preventing corrosion and enhancing the durability of a system, reducing the rate of spontaneous combustion due to reduced moisture, improving crushing efficiency of a coal pulverizer and heat distribution of a power boiler when coal is combusted, resolving the issue of clogging of a moving pathway when coal is transported, and improving coal supply stability by increasing utilization of low-quality coal for which demand is low. Furthermore, the following advantages can be provided: use of low heat capacity coal which is more affordable than high heat capacity coal; savings in fuel cost and manufacturing cost by reduced coal importation; reduction of waste, pollutants, and carbon dioxide generated from exhaust gas by relative reduction of coal consumption, and the advantages of replacement of foreign technology and exportation of equipment to foreign markets could be anticipated.

A packet Core Function (PCF(53, 75, 88, 89)) and method of consistently selecting a Packet Data Service Node (PDSN(54, 81, 90)) from a plurality of PDSNs in a packet data network to host a data session for a Mobile Node (MN(40)). In a first embodiment, a static lookup table (34) in the PCF (42, 44, 46) is used to associate a list of identifiers for MNs and a list of the plurality of PDSNs in the network. The PCF obtains an identifier for the MN and utilizes the lookup table and a hash function to associate the identifier for the MN with a PDSN. The PDSN is then selected by the PCF to host the data session for the MN. In another embodiment, the PCF also includes a cache timer (49) and a cache memory that stores the identifier for the MN and the IP address of the selected PDSN for a predetermined time period following the handoff of the MN to another PCF. If the MN returns to the PCF within the predetermined period of time, the PCF reselects the same PDSN to host the data session. In another embodiment, following the initial selection of a PDSN to host the data session, the IP address of the PDSN is sent to the MN which then passes the IP address of the PDSN to any subsequent PCFs where the MN roams. A PDSN zone ID may be utilized instead of the full IP address.

A high-stability long cantilever type coordinate measuring machine comprises a Y-direction guiding track, a transmission device and a supporting component. A Y-direction sliding plate is fixed on the transmission device. A stand column is arranged on the Y-direction sliding plate. A Z-direction sliding plate is arranged on the stand column in a sleeved mode. The Z-direction sliding plate is fixedly provided with a horizontal X-direction sliding plate which comprises four long guiding track air bearing devices connected to form a long cube box structure. An X-direction transmission device is arranged at one end of the X-direction sliding plate. A horizontal cantilever beam is arranged in the X-direction sliding plate. The machine moves in the X direction by driving of the X-direction transmission device which contains a clamping and guiding leather roller. The high-stability long cantilever type coordinate measuring machine improves moving stability and the straightness and the rigidness of the cantilever beam and the stand column, the innovative design of a transmission mechanism, a supporting mechanism, a cantilever structure and a stand column structure is determined, measuring accuracy can be greatly improved to 7 + 5 L / 1000microns, the high-stability long cantilever type coordinate measuring machine belongs to high-accuracy long cantilever measuring machines in domestic and foreign markets, and the measuring accuracy index is in a leading level.

The invention provides a drinking machine for water-saving and water purification which not only uses membrane separation technique, but also saves water. Multi-filter the water by means of micro filter membrane(MF), ultra filter membrane(UF), reverse osmosis membrane(RO or nano filter membrane NF) to get water with stringent specification and high purification for drinking and using. RO water-purifying machine in domestic and foreign market is combined by two membranes: micro filter membrane(MF), hyper filter membrane(UF), whose extraction rate for water purification is about 15~20%. That means: every time we produce 1 ton pure water, at the same time, we have to dump 4~5 ton water. We develop the water-purifying machine (domestic pipeline split water-provider of water-saving type) on the base of the membrane theories and concentrate the concept on water-saving. And add ultra filter membrane(UF) to conduct preprocessing of reverse osmosis membrane. Change the working principle to: add circulating tank of special design to extract circulatively without wasting a drop water.

The present invention relates to a method of managing a mobile multicast key using a foreign key. More specifically, the present invention relates to a method of managing a mobile multicast key using a foreign key for secure communication between a mobile terminal and a secure relay server in the region where microwaves from plural access points overlap. A method of managing a mobile multicast key using a foreign key according to the present invention has an advantage that multicast secure relay servers perform delegated authentication in advance in a region where microwaves overlap, thus reducing a delay time for authentication in a mobile terminal and it has an advantage that it can minimize an effect from changes in group keys that user's movement make, by using a primary group key and a foreign key. This results in a reduction of an overhead from update of a group key while moving, and accordingly a reduction of a delay time. In addition, it has an advantage that it centralizes functions of key management to a secure relay server, thus overcoming the limitations on processing ability or network bandwidth of a mobile terminal.