110results about How to "Support mobility" patented technology

The present invention provides methods, systems, and computer program instructions for providing location-independent packet routing and secure access in a wireless networking environment (such as that encountered within a building), enabling client devices to travel seamlessly within the environment. Each client device uses a constant address. An address translation process that is transparent to the client and server is automatically performed as the device roams through the environment, enabling efficient client migration from one supporting access point to another. The secure access techniques provide user-centric authentication and allow policy-driven packet filtering, while taking advantage of encryption capabilities that are built in to the hardware at each endpoint.

Provided are a mesh networking auto configuration method, a virtual link setting method, and a packet transmission method in a multi-hop wireless local area network (LAN), and a terminal thereof. According to the provided methods and terminal, the mobility and connectivity of a wireless terminal is guaranteed in a multi-hop wireless LAN, and a seamless service can be provided. Also, a wireless terminal can be enabled to operate in a home gateway in a home networking field according to the present invention.

Disclosed is a method for supporting an idle mode of a terminal in a wireless local area network (WLAN) system. In the method, a first request message for starting an idle mode is transmitted to a first access node to which the terminal is currently connected and a first response message with respect to the first request message is received from the first access node, and in this case, when the first response message includes acceptance information with respect to the start of the idle mode, the idle mode starts.

Sensors mounted on vehicles (e.g., buses, taxis, police cars) and public personnel (e.g., policemen) are used to monitor various conditions and situations such as air quality, potential biological and chemical attacks, and road and traffic conditions. The invention improves upon the typical approach that deploys fixed sensors at every geographical position of interest. The total number of required sensors and the size and the complexity of the network infrastructure required to connect the sensors are reduced and simplified. A method for estimating the number of mobile sensors required to cover a region of interest also is disclosed. A relatively small number of mobile sensors may be sufficient to cover a large area at a lower cost and less complexity than a fixed sensor network.

A handover method for supporting terminal mobility is provided. Before a target core network node updates bearer information according to a target base station to which a User Equipment (UE) performs the handover, an access control determination procedure is added. According to the access control determination information provided by the target base station, if it is determined that the bearer supporting a Selected Internet Protocol (IP) Traffic Offload (SIPTO) or Local IP Access (LIPA) service is permitted to perform the handover, the target core network node updates the bearer information. If it is determined that the bearer supporting the SIPTO or LIPA service is not allowed to perform the handover, the handover failure is notified with respect to the bearer not allowed to perform the handover, and the bearer information is not updated, thus the wasted signaling resource and wireless resource are reduced. Alternatively, during the handover to the target network by the UE or after the handover to the target network, the bearer release or deactivation is performed for the bearer not allowed to perform the handover, so that the UE can re-initiate the bearer establishment process with respect to the bearer not allowed to perform the handover, thus an optimized bearer is established and the Quality of Service (QoS) is ensured.

Provided are a sensor node device and method for supporting mobility of a mobile node in a sensor network. The sensor node device includes: a network interface for communicating with a sink node, at least one neighboring sensor node, and the mobile node; a mobility supervisor for detecting a location of the mobile node, and deciding a sensor node for a service of a data packet received through the network interface on the basis of the detected location; a transmission decision maker for deciding a transmission mode for the data packet received through the network interface according to the location of the mobile node; and a state reporter for reporting a transmission state of the data packet through the sensor node device. When the mobile node moves to a place where radio wave propagation areas of sensor nodes overlap each other, the radio wave intensity of each sensor node is detected to perform a handoff to the sensor node of the area having the strongest radio wave intensity. Thus, a ping-pong problem caused by unnecessary repeated handoff, and a delay problem caused by too slow handoff, can be prevented.

A biological signal sensor apparatus worn on a user's body includes: a sensor unit for sensing physical states or movements of a user to generate biological signal data; a wireless communications unit for performing wireless data communications with a wireless sensor network to transmit the biological signal data; a sensor network protocol processing unit for processing protocols for end-to-end communications between the wireless communications unit and the wireless sensor network and for performing a mobility support procedure for the biological signal sensor apparatus; a processor for controlling the wireless data communications, the end-to-end communications, and the mobility support procedure to allow the biological signal sensor apparatus to serve as a mobile wireless sensor node; and a connection unit for connecting the sensor unit and the processor. The biological signal sensor apparatus serves as a mobile wireless sensor node in the wireless sensor network.

A wireless local area network system capable of supporting host mobility services and an operation method therefor are disclosed. The wireless local area network system includes a gateway performing the functions of a home agent in mobile wireless communication environments and sending prefix information; and access points, each access point allocating an Internet Protocol (IP) address to a mobile host within a range thereof by using prefix information of the gateway. Thereafter, each access point produces and sends a Binding Update list that corresponds to the mobile hosts to the gateway. Thus, the present invention supports the mobility for mobile hosts with or without a mobile IPv6 stack, in a wireless local area network.

A method for adopting network code communication in wireless relaying network, improves the relaying ascending transmission efficiency by setting up relaying nodes and using network coding technique. The method includes the following steps: 1) disposing relaying nodes with network coding function in cellular districts, in order to extend signal coverage and be suitable for adopting network coding; 2) a base station self-adaptively determining whether to adopt relay whether to process using network coding to terminals at the relay point; 3) according to the base station feedback information, relay nodes performing data stream processing based on the network coding technique; 4) the base station centralizedly controlling the switch updating processing of network coding: when terminals move in different service districts, the base station updates relay nodes or service districts, amd newly execute network coding processing at novel relay points. The invention adopts network coding operations at relay nodes, so that the invention can respectively perform coding forwarding to the received different routing information, and largely improves relay transmission efficiency and transmission performance of edge users.

The present invention provides a service node, which extends the services of a carrier's multimedia subsystem (MS), such as an IP multimedia subsystem (IMS), to enterprise networks in an efficient and effective manner. As such, MS subscribers gain access to enterprise services in addition to the carrier's services provided via the carrier's circuit switched subsystems (CS) and packet subsystems (PS). The service node acts as a liaison between enterprise application servers and the MS, such that the enterprise application servers appear as MS application servers to the MS. The service node provides user identifier and protocol translation between enterprise and MS user identifiers and protocols, respectively. As such, enterprise application servers can access the MS as well as be accessed by the MS to support user mobility, with continuity of services, between the enterprise and carrier networks.

The present invention provides a handover method based on a mobile relay comprising: when handover of the mobile relay occurs, a source Donor evolved NodeB (DeNB), as an intermediate node, connecting a relay access network with an Evolved Packet Core (EPC), the relay access network at least comprising a target DeNB and a mobile relay; and the source DeNB forwarding data from the relay access network to the EPC and forwarding the data from the EPC to the relay access network. With the present invention, the handover of the mobile relay is implemented, and the mobility of the relay can be supported.

The invention discloses a virtual reconstruction ubiquitous network architecture based on identity-position separation. The virtual reconstruction ubiquitous network architecture comprises a terminal and stub network layer, an edge access network layer, a virtual reconstitution core network layer, an application layer and a service support layer. The terminal and stub network layer comprises an intelligent multi-mode terminal supporting an identity-position separation mechanism, and a traditional terminal and stub network which has direct access to an edge access network or has access to the edge access network through a ubiquitous network gateway; the edge access network layer comprises wired and wireless access networks, provides access capability of an IP core network for a bottomlayer terminal, and achieves separation of control and bearing; the application layer comprises an application server, and provides unified service access capacity for heterogeneous users; the service support layer comprises various functional entities, and provides necessary function support. According to the virtual reconstruction ubiquitous network architecture based on identity-position separation, efficient convergence between heterogeneous networks is achieved through virtual reconstruction and identity-position separation, and support to terminal mobility and multi-connection capacity of users and terminals is achieved.

A method for receiving-transmitting ground mobile multimedia broadcast based on free charge DAB includes configuring parameter according multimedia service to carry out source and channel coding and embedding coded service data in master service channel MSC as well as carrying out channel coding to form T-MMB transmission frame being sent out at sending end, synchronizing and decoding received signal and picking up configured parameter as well as carrying out decoding on source and channel at receiving end.

The invention relates to route method based on tree structure. It includes the following steps: judging data source after grouping; for the lower level node checking up run routing list, selecting one node as relay node, and transmitting the data grouping into the upper level node; for the upper level node checking the down run routing list, selecting one route reached to destination node, and transmitting the data grouping to the next jump node. The up run routing list records the node ID, jump number and the neighbor node ID and jump number. The down one records upper layer node list, peer node list, down run chain route information. The invention has the advantages of little control spending, high data transmitting efficiency, low bandwidth consumption, suiting for network topology dynamic change.

The present invention discloses a DMRS (demodulation reference signal) indication method. The method includes the following steps that: designated DMRS ports, layers and orthogonal cover code (OCC) lengths are assigned to user equipment (UE) according to a DMRS configuration parameter indication table; various kinds of DMRS configuration parameter indication entries of various kinds of OCC length combinations containing at least two OCC lengths are recorded in the DMRS configuration parameter indication table; and corresponding DMRS indication information is generated according to the DMRS configuration parameter information assigned to the UE, and the corresponding DMRS indication information is sent to the UE. The present invention also discloses a base station, UE (user equipment) and a DMRS (demodulation reference signal) indication system.

A method is provided for performing handoff in a communication system including a serving base station (BS) in communication with a mobile station (MS), at least one neighbor BS using a communication scheme different from a communication scheme of the serving BS, and the MS capable of communicating with the neighbor BS. The method includes compensating a signal strength of one of the serving BS and the neighbor BS, received at the MS, such that handoff decision is possible, and determining whether to perform a handoff of the MS, using the compensated signal strengths.

The invention belongs to the technical field of a fog computing network, and particularly relates to a cloud / fog hybrid network architecture based on an SDN. The cloud / fog hybrid network architecture comprises an infrastructure layer, a fog computing layer, an SDN control layer and a cloud computing layer, wherein the infrastructure layer is used for sending a request of a user terminal and detection data of a medical device to the fog computing layer; the fog computing layer is connected with the infrastructure layer via an unshielded category 5e twisted pair, and is used for receiving and storing medical data uploaded by the user terminal, downloading an analysis result on a cloud server in an active caching manner, processing the medical data uploaded by a client according to the downloaded analysis result, and uploading the medical data to the cloud computing layer; the SDN control layer is connected with the fog computing layer via the unshielded category 5e twisted pair, and is used for controlling data forwarding of the fog computing layer; and the cloud computing layer is connected with the SDN control layer via an optical fiber, and is used for storing the collected medical data, carrying out analysis on the medical data, and processing the medical data received by the fog computing layer cooperatively with the fog computing layer.

Sensors mounted on vehicles (e.g., buses, taxis, police cars) and public personnel (e.g., policemen) are used to monitor various conditions and situations such as air quality, potential biological and chemical attacks, and road and traffic conditions. The invention improves upon the typical approach that deploys fixed sensors at every geographical position of interest. The total number of required sensors and the size and the complexity of the network infrastructure required to connect the sensors are reduced and simplified. A method for estimating the number of mobile sensors required to cover a region of interest also is disclosed. A relatively small number of mobile sensors may be sufficient to cover a large area at a lower cost and less complexity than a fixed sensor network.

The invention provides a location identifier and host identifier separation-based network system and a mobility management method thereof. The system consists of a core area CA, a routing area RA formed by an organization area OA, a routing area router (RA Router), an organization area router (OA router), a mapping server in the routing area, and various terminals. To simplify the system, functional modules of the mapping server are distributed in routers in the routing area, including the RA router and the OA router, namely a distributed Hash table is used to organize the all RA routers and OA routers in the routing area to store the mapping information between a terminal location identifier, a location identifier of the OA Router connected with the terminal currently, and a host identifier; and from the terminal perspective, the router storing the mapping information of a terminal is called a mapping router Router-M of the terminal. The invention also provides an improved mobility management method on the basis of the network, which supports mobile conversation on the basis of solving the problem of routing expansibility. Furthermore, the invention can be compatible with Internet to reduce the deployment difficulty.

In a network environment in which an endpoint identifier and a routing locator are separated from each other, a first router receives a data packet including an endpoint identifier of a first host and an endpoint identifier of a second host that is a communication target of the first host from the first host managed by the first router in order to convert a network address. A message requesting external address prefix information of the second host is transmitted to a second router managing the second host. In addition, the external address prefix information is received from the second router and a routing locator of the second host is generated by converting internal address prefix information of an endpoint identifier of the second host into the external address prefix information of the second host in the data packet.

The invention relates to a method for carrying out grouping cooperative communication on multiple users based on network encoding technology, which means that grouping is carried out on the multiple users in a special grouping way in a cellular relay network; then, each group of user data is encoded and transmitted by a relay node through the network encoding technology, so that the relay transmission efficiency is improved, and the problem of low relay upstream transmission efficiency can be solved; and when the user is positioned at the edge of a subdistrict, the method can improve the transmission performance, and the coverage range of a base station in the whole subdistrict is enlarged. The method comprises the operation steps of: setting the functions of the relay node in an initialized way, channel estimation and base station selection, judgment of a cooperative partner, grouping transmission executed by the user and self-adaptive centralized control executed by the base station. The method fully utilizes the channel characteristics of cellular cell users, and can be used for grouping the multiple users, thus practically improving the relay transmission efficiency and the transmission performance of the edge user, and reducing the outage probability of the system.

The invention relates to a method for constructing an emergency communication system and the emergency communication system, wherein the method comprises: step one, emergency base stations and emergency gateways are deployed in emergency places, and emergency communication networks are established among the emergency gateways through the emergency gateways; step two, when user terminals in the emergency places are placed in the emergency communication networks, the emergency base stations receive login requests of the user terminals and send the login requests to the emergency gateways, and the emergency gateways close authentication processes to the user terminals and accept the user terminals; and step three, the user terminals perform voice, video and / or data transmission communication services. According to the method for constructing the emergency communication system and the emergency communication system, a Femtocell private network can be used for deploying the emergency communication networks rapidly under the circumstance of the failure of public mobile communication infrastructures, convenience is provided for emergency or disaster relief communications, and the method and the emergency communication system can be used in other special communication scenes of mines, outdoors and the like.

A method for receiving -transmitting ground mobile multimedia broadcast of compatible DAB includes receiving service data of multimedia broadcast, carrying out source and channel coding on service data, embedding coded data in main service channel MSC, identifying sub-channel information and carrying out channel coding on data in FIC channel, carrying out channel modulation and OFDM modulation as well as radio frequency modulation on data in FIC and MSC channels then sending modulated data out.

Provided are a method and an apparatus for a NarrowBand-Internet of Things (NB-IoT) terminal to perform a mobility process. The method may include: transmitting an RRC connection re-establishment request message to a base station when a pre-set event occurs; receiving an RRC connection re-establishment message from the base station; and resuming a signaling radio bearer on the basis of the RRC connection re-establishment message.

The invention discloses a VLC-WiFi hybrid network user link access and switching method. The method comprises the steps that during an initial stage, a user terminal applies a WiFi access uplink for a server; then, the user terminal applies a WiFi access downlink or a VLC downlink for the server according to a region in which the user terminal is located; and, the user terminal judges whether downlink switching is carried out or not according to whether a user terminal carrier can receive VLC data or not when moving among different regions, and / or the accuracy of receiving the VLC data. According to the method, the access of a user in a VLC-WiFi hybrid network is realized and the mobility of the user can be supported, so that the moving user also can obtain a relatively good communication link, the network capacity and speed are expanded and increased, and the service quality of the VLC-WiFi hybrid network is ensured.

There is provided a method including providing a local breakout service to an Internet protocol gateway while retaining user access control and a remote Internet protocol gateway of a packet core network of a radio network for a mobile terminal; providing information on neighboring macro cells in which the local breakout service can continue, the macro cells belonging to a network using another tracking area than that of the serving cell of the mobile terminal; executing a handover process of the mobile terminal from a source base station in the serving cell of the mobile terminal to a target base station in a neighboring macro cell; and providing session continuation of the mobile terminal local breakout service traffic in the neighboring macro cell by controlling user plane tunneling between the target base station and the local packet switched network from which an Internet protocol address for the local breakout service was assigned.

Disclosed are an SIP-based user mobility service providing apparatus and method using user position information obtained by a sensing apparatus. When a user enters a specific region, a gateway including a sensing management module carries out SIP registration for several terminals existing in the specific region in place of user agents of the terminals. The sensing management module transmits an SIP registration message to an SIP proxy server and notifies the terminals of the completion of SIP registration. Then, the user receives a call using the same kind of a terminal as a specific terminal previously set on the basis of a user's preferences among the terminals in the specific region.

An apparatus and method for protecting user data are disclosed herein. The apparatus for protecting user data includes a network filter, a user authentication unit, a message relay unit, and a key management unit. The network filter filters traffic between a user and a cloud server. The user authentication unit registers and authenticates the user. The message relay unit relays a message and data included in the traffic between the user and the cloud server. The key management unit generates and manages a key required to encrypt the data.