Abstract: The disclosure proposes a routing gateway selecting method, a controller and a vehicles network system. The method is adapted to a controller disposed on a fleet of vehicles configured by a plurality of vehicles, and the controller is configured to select a routing gateway among a plurality of gateways for routing an access point (AP). The routing gateway selecting method includes: predicting a bandwidth of each of the gateways; calculating a transmission cost of each of the gateways based on a load condition and the bandwidth of each of the gateways and a hop count between each of the gateways and the AP; and selecting the routing gateway among the gateways for routing the AP according to the transmission cost of each of the gateways.

Abstract: A compression method featuring dynamic coding for wireless communication in wireless network is used to transmit a packet to clients. An access point (AP) divides a packet into several chunks all having a fixed length, sorts repetition frequencies of all the chunks, and encodes the repeated chunks with Huffman codes. Before transmitting the packet, AP divides the packet into chunks and determines whether there are chunks having been encoded, and transmits the encoded packet and the codes thereof to a specified client and other clients within coverage of transmission. After receiving the encoded packets, the client decodes the encoded packets to recover the original ones. The other clients also store the repeated chunks and the codes thereof The information of the Huffman codes of the repeated chunks needn't be transmitted every time for different clients since other clients may overhear the Huffman codes not intended to send to them.

Abstract: The present disclosure illustrates a method for PET attenuation correction, and the method includes the steps: computing linear attenuation coefficients and mean CT numbers of water, various iodine contrasts and a plant oil-based phantom, to generate energy-mapping curve data by ANN; providing an object to be detected, and reconstructing CT data to generate a CT image after the object is scanned by CT and PET respectively; introducing the CT numbers of pixels the CT image into the energy-mapping curve to generate an attenuation map; computing the attenuation map to generate an attenuation correction factor; multiplying the PET image by the attenuation correction factor to generate a corrected PET sinogram, and reconstructing the corrected PET sinogram to generate a corrected PET image.

Abstract: A fluorescent fusion protein is provided. The fluorescent fusion protein of the invention comprises a first fluorescent protein with first emission wavelength, a second fluorescent protein with second excitation wavelength and second emission wavelength, and a linker peptide linking the first fusion protein and the second fusion protein, wherein the first emission wavelength overlaps the second excitation wavelength so that the second fluorescent protein exhibits the second emission wavelength after receiving energy. The fluorescent fusion protein of the invention exhibits a stronger fluorescence in the absence of bilivirdin (BV).

Abstract: A system and method is provided to manage wireless network mobility and wireless network resources. In one aspect of the invention, network equipment acquires samples associated with time that past user devices stayed in the coverage range of the network equipment and estimates a time that a user device currently stays in the cell based on the acquired samples. In another aspect, pre-authentication and pre-registration of the user device in another network are performed based on the estimated time. In yet another aspect, network resources reserved for the user device are released based on the estimated time.

Abstract: The present invention discloses a computed tomography (CT) image reconstruction method using two-dimensional images at different angles as well as a two-dimensional virtual matrix on a basis of spherical space, to process projection, comparison, and correction. Thus, it can obtain the tomography within predetermined difference value to reduce computational and storage space. Matching the parameters of energy source and image capturing can further shorten energy radiation on an object's (i.e. a human body) exposure time, in order to reduce radiation effects of energy sources (i.e. as X-rays) of the object (i.e. as a human body).

Abstract: A moving carrier signal transmission method and a signal transmission device using the same are provided. A main moving carrier acquires an identification code of an ambient moving carrier. The main moving carrier adds an identification code of the main moving carrier and the identification code of the ambient moving carrier in a data request and then sends out the data request to the ambient moving carrier according to the identification code of the ambient moving carrier. When the ambient moving carrier obtains the data request, the ambient moving carrier adds the identification code of the main moving carrier in a moving carrier list and transmits the moving carrier list to the main moving carrier.

Abstract: The present invention provides a system and method for reducing loads of a mobility management entity in core networks. An object sending a connection-request message asking for network access to a base station through a wireless network; the base station receiving the connection-request message and sending it to core networks through a network; a mobility management entity (MME) in the core network receive the connection-request message. If the core network is busy and refuses to interconnect with the object, MME calculating according to a management rule a back-off time; MME transmitting a response message including the back-off time to the object through the base station, and the object sending out a connection-request message again after the back-off time has elapsed according to the response message.

Abstract: Avoiding vehicle collisions using an in-vehicle device is provided. The method comprises receiving a connection request from an in-vehicle device within a moving vehicle when the moving vehicle is within a selected distance from a traffic intersection, establishing connection with the in-vehicle device within a moving vehicle via a serving base station, receiving position information from the in-vehicle device within a moving vehicle corresponding to a position of the moving vehicle, receiving control information for a traffic light at the traffic intersection from a traffic management center and relaying the control information for the traffic light to the in-vehicle device within a moving vehicle. A warning is issued based upon a vehicle speed, a location and a position relative to a traffic intersection. A warning is also issued based upon multiple vehicles speed, relative locations to each other and each position relative to a traffic intersection.

Abstract: An inventive system and method for group communication among devices in M2M networks comprises associating one or more of the devices with a gateway having a unique identifier, initiating registration of the devices at an M2M network using the unique identifier of the gateway, providing from the network a temporary identifier to the gateway and associating, in the network, the temporary identifier with the gateway, attaching the devices to the network using the temporary identifier, and communicating information between the network and the device through the gateway. In one aspect, the devices can be classified into sub-groups and each sub-group has a sub-group head that can be attached to the gateway so that the devices can communicate with the network through the sub-group head instead of the gateway. Each sub-group can be associated with a unique temporary identifier, in addition to the temporary identifier associated with the gateway.

Abstract: The method for maximizing an unavailability interval includes the steps of initializing the starting frame number of each power saving class fi to 1 and adjusting fi to fi? when the least common multiple of m1, m2, . . . , mi?1 and mi is not relatively prime. The index i is an integer from 1 to t, mi is the sleep cycle of the ith power saving class, and fi? is an integer that maximizes common sleep windows of the i power saving classes. The common sleep windows of the t power saving classes are then set as the maximum unavailability interval of the wireless telecommunication device.

Abstract: A method for relocating network gateways comprises the steps of obtaining a moving average of drop ratios and setting the duration of the next detection interval based on the moving average of drop ratios, and requesting at least one mobile station to perform a CSN mobility management procedure when the moving average of drop ratios exceeds a high drop ratio.

Abstract: A system and method is provided to manage wireless network mobility and wireless network resources. In one aspect of the invention, network equipment acquires samples associated with time that past user devices stayed in the coverage range of the network equipment and estimates a time that a user device currently stays in the cell based on the acquired samples. In another aspect, pre-authentication and pre-registration of the user device in another network are performed based on the estimated time. In yet another aspect, network resources reserved for the user device are released based on the estimated time.

Abstract: A roaming method for maintaining connectivity between a client and a server through heterogeneous wireless networks includes the steps of establishing an initial connection between the client and the server through a first selected one of the heterogeneous wireless networks, detecting disconnection of the initial connection, and establishing a current connection between the client and server through a second selected one of the heterogeneous wireless networks upon detecting that the initial connection has been disconnected. A system, which includes the client and the server, for realizing the roaming method is also disclosed.

Abstract: A method for assessing bone status is disclosed. The method for assessing bone status comprises steps of: obtaining a chest radiograph, recognizing a target bone on the chest radiograph by active shape models, detecting edges of a cortical bone of the target bone by intelligent scissors, and calculating a parameter of bone status through the cortical bone. The present invention increases the diagnosis value of the chest radiography and provides a simple, economic, rapid and reliable assessment of bone status.

Abstract: A method for relocating network gateways comprises the steps of obtaining a moving average of drop ratios and setting the duration of the next detection interval based on the moving average of drop ratios, and requesting at least one mobile station to perform a CSN mobility management procedure when the moving average of drop ratios exceeds a high drop ratio.

Abstract: The method for maximizing an unavailability interval includes the steps of initializing the starting frame number of each power saving class fi to 1 and adjusting fi to fi? when the least common multiple of m1, m2, . . . , mi?1 and mi is not relatively prime. The index i is an integer from 1 to t, mi is the sleep cycle of the ith power saving class, and fi? is an integer that maximizes common sleep windows of the i power saving classes. The common sleep windows of the t power saving classes are then set as the maximum unavailability interval of the wireless telecommunication device.

Abstract: A method for reconfiguring the security mechanism of a wireless network system includes steps of: sending a packet from a network node to a mobile node; sending a negotiation packet from the mobile node to the network node according to a selected authentication protocol; the mobile node and the network node proceeding the authentication process if the received negotiation packet is valid; the mobile node and the network node generating a security association after the authentication process is completed.

Abstract: An apparatus dynamically assigns external home agent (HA) for VPNs and a method for the same is proposed. The apparatus establishes VPN between an internal network and at least one external network, whereby a mobile node (MN) can roam in the external network with security. The external HA closest to the MN in the visited external network is selected for mobility management of the MN. The MN only needs to register with the same external HA when roaming in the same external network. The handoff latency and end-to-end latency for a roaming MN, therefore, could be reduced significantly. It will also not reestablish the IPsec tunnel within the same external network.

Abstract: An apparatus dynamically assigns external home agent (HA) for VPNs and a method for the same is proposed. The apparatus establishes VPN between an internal network and at least one external network, whereby a mobile node (MN) can roam in the external network with security. The external HA closest to the MN in the visited external network is selected for mobility management of the MN. The MN only needs to register with the same external HA when roaming in the same external network. The handoff latency and end-to-end latency for a roaming MN, therefore, could be reduced significantly. It will also not reestablish the IPsec tunnel within the same external network.