38results about How to "Faster handover" patented technology

This invention provides a wireless communication system wherein a network to which a mobile station should be handed over can be selected, using parametric data collected from network components other than the mobile station. Time taken for a handover between different types of network systems is reduced. The wireless communication system of the present invention comprises a mobile station equipped with multiple wireless interfaces, a server connected to a fixed network, and multiple access points. The mobile station determines available wireless interfaces and sends notification of the available interfaces' identifiers to the server. The server collects managerial data from network components and selects a wireless interface, based on the notification from the mobile station and the managerial data. The mobile station registers its locations in visiting networks corresponding to multiple available wireless interfaces with the server. The server retains the registrations of mobile station locations for the above wireless interfaces.

A handover method in a wireless communication system is disclosed. A serving base station transmits a handover request message to a base station controller in response to a handover request of a mobile station. The base station controller determines target base stations to which the mobile station can perform handover among target base stations in a list of neighbor base stations, and transmits a handover response message including the determination result information to the mobile station via the serving base station. The mobile station determines a target base station to which it will perform handover, and transmits a message indicating that it will perform handover, to the base station controller via the serving base station. The base station controller transmits a confirm message indicating that the mobile station will perform handover, to the determined target base station, and establishes a tunnel to the target base station. The mobile station registers itself in the target base station.

A system, device, and method for real-time handoff in a mobile IP network is provided. In an embodiment, an indication that a mobile device is in a new network is sent out more often in a beacon than in an IRDP message in order to provide an effective seamless connectivity between service areas for wireless communications.

Disclosed is a method for fast handover in a wireless security data communication environment. The fast handover method for a mobile node connected to a network via an access point to perform a data communication in a wireless communication environment according to the present invention includes: performing an authentication while communicating with an authentication server having registration information about the mobile node via an uncontrolled port of the access point so as to make the mobile node connected to the network; performing a mobile Internet Protocol (IP) registration for binding a Care-of-Address (CoA) to a home agent and a correspondent node (CN) via the access point in parallel with performing the authentication; and opening a control port of the access point and relaying data transceived at the mobile node using the CoA when the authentication and the registration being successfully completed. Accordingly, a fast handover of the mobile node can be supported.

A handover method in a wireless communication system is disclosed. A serving base station transmits a handover request message to a base station controller in response to a handover request of a mobile station. The base station controller determines target base stations to which the mobile station can perform handover among target base stations in a list of neighbor base stations, and transmits a handover response message including the determination result information to the mobile station via the serving base station. The mobile station determines a target base station to which it will perform handover, and transmits a message indicating that it will perform handover, to the base station controller via the serving base station. The base station controller transmits a confirm message indicating that the mobile station will perform handover, to the determined target base station, and establishes a tunnel to the target base station. The mobile station registers itself in the target base station.

A method of treating signals in a bridge-based radio access station backbone network including a plurality of base station bridges (BSBs), with each BSB having a 2-tiered switch connected with a plurality of radio access stations. A plurality of SCBs (Site Core Bridges), each of having a 2-tiered switch for constituting the core network, includes the steps of buffering by the SCB a predetermined number of previously-transmitted frames when operating as a crossover bridge, and causing the SCB to retransmit selected ones of the buffered previously-transmitted frames to a terminal in response to a handover completion signal.

Provided is a mobile IPv6 fast handovers method, which includes the steps of: a) if a mobile node is moved in a layer 2, receiving a modified RS message from a mobile node in the access router, b) detecting movement of the mobile node in a layer 3 in the access router, c) if the mobile node makes a movement in the layer 3, generating CoA of the mobile node in the access router; d) performing Duplicate Address Detection in the access router to inspect uniqueness of the generated CoA; and e) transmitting a modified RA message to the mobile node in the access router. The Fast Handovers method of the present research performs fast movement detection by using layer 2 information simply and efficiently for fast handover in the mobile IPv6 and generates CoA in the access router instead of the mobile node without operations of many additional messages.

A handover management apparatus and method for heterogeneous networks is provided. The handover management method includes receiving a handover request notification from a serving access node (AN) that is located in a first wireless network and connected to a mobile node (MN) and extracting information from the received handover request notification. The extracted information relates to a target AN that is located in a second wireless network heterogeneous from the first wireless network. The method further includes changing the target AN, which is discovered from the extracted information, to an AN of the MN and storing information associating the mobile node with the target access node.

The invention relates to a method (50) in a base station (21) for handling handover of a user equipment (31) from the base station (21) to one of two or more target base stations (23, 25). The method (50) comprises the steps of: detecting (51) a physical cell identity confusion situation; initiating (52) handover preparations towards the two or more target base stations (23, 25) including conveying an information element to the two or more target base stations (23, 25); receiving (53) response messages from the two or more target base stations (23, 25), the response messages being based on the transmitted information element and thus being identical; transmitting (54) to the user equipment (31) a unique handover message, enabling the user equipment (31) to perform a handover to appropriate target base station (25). The invention also relates to base stations, computer programs and computer program products.

A revision level notification method and system for a mobile station is provided for facilitating a handover between networks of different generations. The revision level notification method for an inter-generation handover includes detecting a handover trigger event for a handover from a first network to a second network, setting a protocol version in association with the first network, receiving a classmark enquiry message from the second network, and transmitting a classmark change message containing a revision level of a mobile station obtained with reference to the protocol version to the second network in response to the classmark enquiry message.

A method and apparatus are described, for providing short-range uncompressed video service in a cellular network. The method comprises the steps of: establishing a communication link between at least one local sensor to a base station or to a first user equipment (UE), by using a non-cellular technology; establishing a radio communication channel by using a cellular technology between at least one second user equipment (UE) and the base station or between at least one second UE and the first UE by using a device-to-device (D2D) cellular technology; transmitting over the radio communication channel, uncompressed video data representing at least one area of the video image that was received from the at least one local sensor or control information resulting from processing the received data; and providing the received data or the control information to at least one mobile application residing at the at least one second UE or to at least one control element associated with the at least one second UE.

In a mechanism to select an access layer termination node for a communication connection of a user terminal in a multi-access network, a connection parameter list is transmitted in a mobile IP registration procedure from a mobility layer network portion to a user terminal. The connection parameter list comprises prioritized information on connection parameters of an access layer. The prioritized information is then used for selecting an access layer network portion when establishing a connection between the user terminal and a network comprising the access layer network portion.

A method and an apparatus of performing a fast handover in a wireless network are provided. The network device includes: a packet generating unit to generate a router solicitation (RS) message including fast handover instruction information, when the network device participates in a new subnet; a packet sending unit to send the generated router solicitation message to a router within the subnet; a packet receiving unit to receive a router advertisement message including handover information necessary to generate an address from the router according to the fast handover instruction information; and a determination unit to generate the address required by the subnet using the handover information.

A wireless communication system which enables fast handovers by eliminating a time lag that occurs during handover process. A new base station recognizes lower layer link switching timing of a mobile station, then adjusts the output timing of a packet transmission initiation message, which triggers packet transmission, so that when a packet is transmitted from a new relay device to the mobile station, the packet may arrive at the mobile station immediately after the lower layer link switching, and sends out the packet transmission initiation message at the adjusted output timing to the new relay device. On receiving the packet transmission initiation message, the new relay device transmits the packet to the mobile station. The mobile station executes the lower layer link switching to complete lower layer handover, and then completes upper layer handover on receiving the packet from the new relay device immediately after the link switching.

An apparatus and method is described for authentication while exchanging data in a communication system includes deriving (100) an authentication signature from a shared secret, data in an existing data packet, and / or a sender identification. A next step (102) includes appending the authentication signature in an authentication field to the existing data packet. A next step (104) includes sending the data packet with the appended authentication field. A next step (106) includes receiving the data packet by a base station. A next step (108) includes verifying that the authentication field was produced by a sender possessing the shared secret. A next step (110) includes returning an acknowledgement message.

A femtocell wireless signaling / data mesh network for multi-user, multi-mode baseband signaling methods, timing / frequency synchronization, and receiver architectures is disclosed. The femtocell wireless signaling / data mesh network includes a plurality of femtocells connected by a plurality of wireless links. A first femtocell of the plurality of femtocells directly communicates with a second femtocell of the plurality of femtocells via a wireless link between the first femtocell and the second femtocell.

A radio station system for a wireless network with at least two access network nodes, wherein a first of the at least two access network node is assigned to the radio station system as an access network node in the wireless network and the radio station system is connected to the first access network node over an active radio link for the transmission of user data. During the existence of the active radio link between a first radio station and the first access network node, a second radio station transmits or exchanges no user data via a radio link with an access network node in the wireless network and at least at times identifies available access network nodes in the wireless network for the radio station system.

A method and system for transmitting / receiving data in a heterogeneous communication system. A terminal accesses a first controller of a first communication system supporting a first communication service to make a communication path to the first communication system. After making the communication path to the terminal, the first controller determines whether it is possible to provide the first communication service to the terminal over the first communication system. If it is not possible, the first controller transmits to an interworking unit a first request indicating that the terminal requires the first communication service over the second communication system. The interworking unit transmits a second request to a second controller of the second communication system in response to the first request, the second request indicating that the second controller provides the first communication service to the terminal. Upon receiving a response to the second request, the interworking unit controls the first controller to provide the first communication service to the terminal over the second communication system according to the response.

A method and apparatus of supporting a fast handover in a transport layer is provided. In a network using an SCTP (Stream Control Transmission Protocol), an MN (Mobile Node) acquires a first new IP (Internet Protocol) address after a first handover to a first new network area, stores information about the first handover to the first new network area, and sends (i.e., transmits) a first handover message including the new IP address to a CN (Correspondent Node). If a second handover to a second network area is required, the MN performs the second handover even if a response message for the first handover message has not been received, acquires a second new IP address, stores information about the second handover, and sends a second handover message including the second new IP address to the CN.

The invention provides for a telecommunications system and related method of handover from a first radio access technology to a second radio access technology for a mobile radio communications device within a mobile radio communications network, and including determining a timing advance value associated with the second radio access technology, and the method employing positional data of the device within the network for determining the said timing advanced value.

A method, UE and access network device for implementing data transmission of a convergence network. The method includes: a UE bottom layer WLAN entity encapsulating signaling and / or data issued by a UE upper layer entity into a WLAN protocol format and transmitting it to a 3GPP access network through an air interface; and the UE bottom layer WLAN entity receiving the signaling and / or data transmitted by the 3GPP access network through the air interface, and decapsulating and then transmitting it to the UE upper layer entity.

Provided is an apparatus and method for transmitting / receiving a message for a handover to a heterogeneous system in a BWA system. In the method, a neighboring BS information message containing the neighboring heterogeneous system BS information is generated according to the neighboring BS information message generation scheme of the serving system. The serving system BS has only to transmit information about a neighboring BS of the serving system, thus reducing a message overhead. Also, the neighboring heterogeneous system BS has only to transmit its own BS information within the corresponding coverage, thus enabling efficient use of control channel resources.

Provided is a fast handover method using a layer 2 (L2) and layer 3 (L3) combination. When a mobile node moves from a present region to another region, fast handover of the mobile node is provided using a location update function between handover control agents (HCAs), and data bicasting from an old HCA wherein the mobile node performs handover to a new HCA.

Provided is a mobile IPv6 fast handovers method, which includes the steps of: a) if a mobile node is moved in a layer 2, receiving a modified RS message from a mobile node in the access router, b) detecting movement of the mobile node in a layer 3 in the access router, c) if the mobile node makes a movement in the layer 3, generating CoA of the mobile node in the access router; d) performing Duplicate Address Detection in the access router to inspect uniqueness of the generated CoA; and e) transmitting a modified RA message to the mobile node in the access router. The Fast Handovers method of the present research performs fast movement detection by using layer 2 information simply and efficiently for fast handover in the mobile IPv6 and generates CoA in the access router instead of the mobile node without operations of many additional messages.

A method of treating a handover in a bridge-based radio access station backbone network including a plurality of base station bridges each including a two-tiered switch connected with a plurality of radio access stations, a plurality of SCBs (Site Core Bridges) each composed of two-tiered switch for constituting the core network, and an HLR (Home Location Register) for managing the structural information of the network constituents. The SCB stores the terminal information containing the receiving address of the initial terminal registration message and the SCB to delete the terminal information in response to a disconnection message of the terminal caused by handover, to request the SCBs in the terminal end of the old MAC-in-MAC tunnel to delete the tunnel information and the terminal information, and to inform the HLR of initiating the handover to change the registered operational state of the terminal.

A communication control method for a communication system stores location information indicating an interference region by neighboring wireless base stations, a first weighting factor for one wireless base station to direct its beam to the interference region, and a second weighting factor for the other wireless base station to direct its beam, correspondingly to one another in an interference table The system judges whether a terminal is located in the interference region by obtaining weighting factors adopted by each of the neighboring wireless base stations while the one wireless base station communicates with the terminal, compares the weighting factors to the first and second weighting factors stored in the interference table, and controls beam generation of the other wireless base station to prevent its interference when the terminal is located in the interference region.

A system, device, and method for real-time handoff in a mobile IP network is provided. In an embodiment, an indication that a mobile device is in a new network is sent out more often in a beacon than in an IRDP message in order to provide an effective seamless connectivity between service areas for wireless communications.