339 results about "Mobile relay" patented technology

The present invention relates to remote radio control technology, and a remote radio control system includes a radio movable working machine (1), a remote control apparatus (6A), and a movable repeater station (7). First bidirectional communication means (31, 71) having a high radio wave directionality and first automatic tracking means (32, 71A) are provided between the working machine (1) and the repeater station (7), and second bidirectional communication means (63, 76) having a high radio wave directionality, second automatic tracking means (63A, 76A), and emergency spread spectrum bidirectional communication means (64, 87) for enabling bidirectional communication between the remote control apparatus (6A) and the repeater station (7) when communication by the second bidirectional communication means (63, 76) is impossible are provided between the remote control apparatus (6A) and the repeater station (7). Consequently, even if communication between the working machine (1) and the movable repeater station (7) is disabled, each of the working machine (1) and the repeater station (7) is permitted to perform a minimum necessary operation, and any other person than those skilled in actual controlling operation of the working machine (1) can perform remote control easily.

A wireless signal repeater having an integrated display that concurrently displays a receive signal level, a transmit signal level, and a textual indication of signal quality, reflecting how well the repeater is currently operating to repeat wireless signals. By reference to the integrated display, a user can readily determine whether the repeater is well positioned to function as desired. And if the display indicates that the repeater is not functioning optimally, the user can then conveniently move the repeater around until the repeater reflects an acceptable level of operation.

The invention discloses a terminal D2D (device-to-device) cooperation relay communication implementation method in a TD-LTE-A (time division-long term evolution-advanced) system, and relates to a relay communication implementation method in the TD-LTE-A system. The method disclosed by the invention aims at realizing communication coverage on terminals in the TD-LTE-A system under a 4G (4th generation) standard and improving service quality and system throughput. According to the method disclosed by the invention, an on-net idle user in a cell is used as a mobile relay, terminal D2D cooperation relay communication is established with a user on the edge of the cell, relay service is provided for the user on the edge of the cell, the coverage range of the cell, the service quality of the user on the edge and the system throughput are significantly improved by resource allocation and time slot allocation of the cell, and the network construction cost of the system can be further greatly reduced. The method disclosed by the invention is suitable for the TD-LTE-A system.

An apparatus and method of processing handover of a mobile relay station (MRS) in a cellular communication system using a multihop relay scheme is provided. The handover processing method includes transmitting, by the MRS, a handover request message containing child node information to a serving BS when handover is required; making, by the serving BS, an adjacent node list by collecting handover-related information from adjacent nodes to which the MRS is able to be handed over when the handover request message is received; transmitting, by the serving BS, a handover response message containing the adjacent node list to the MRS; and determining, by the MRS, a handover target node based on information contained in the handover response message and transmitting a handover indication message containing the target node to the serving BS. By suggesting the handover method of the MRS in the multihop relay system, it is possible to provide uninterrupted communication to the MRS and its child node in the service area of the MRS.

A mobility state of a mobile relay node is determined as one of three or more different mobility states. The mobile relay node may determine the mobility state itself or based on received information from another network node. Control information is determined based on the determined mobility state of the mobile relay node and an action is then performed or initiated based on the determined control information. The tree different mobility states may include moving, standing, and at least one additional mobility state. Example additional mobility states of the mobile radio node include: departing, arriving, or temporarily stopped.

The present invention discloses a communication system and method for data acquisition and distribution from and to remote devices, applicable for Automatic Meter Reading (AMR), based on ad-hoc mesh networking and mobile relays.

A system and method is provided to facilitate communication and collaboration by considering the timing of a user's activities on one or more clients via accessing, from a centralized server, information about the user's client-server interactions. The systems and methods can harness existing protocols and data exchange used in legacy client-server applications for email, making available to one or more client-side message routing applications, information about a user's interactions with email across multiple clients. Applications include considering the time since the last client-server interaction to guide decisions about if, when, and how to route messages so as to limit the mobile relay of information a user has already seen, providing information to colleagues about a user's current or past “inbox presence,” and forecasting the time until a user will have access to a device or communication channel.

There is provided a handover method by a mobile relay station (MRS) or base station (BS) so as to effectively perform a handover of the MRS and mobile stations (MSs) in an environment in which data is communicated through a relay of the MRS. There is also provided a handover method capable of securing backward compatibility of an MS during a handover. There is provided a handover method in which an MRS is considered. It is possible to improve the efficiency of the handover by allowing handovers of the MRS and MSs to which the MRS relays to be initiated by the MRS or BS. It is possible to secure the backward compatibility of the MSs by allowing the MRS to generate and manage a mapping relation between information on communication identifiers (CIDs) of the MSs, which are changed during the handover, and information on previous CIDs of the MSs.

A method and apparatus for performing a handover procedure in a wireless communication system including a mobile relay node is provided. A target evolved NodeB (eNB) receives a handover request message containing a list of a plurality of user equipments (UEs) on the mobile relay node or a group handover indication. The target eNB performs an admission control for the plurality of UEs; and transmits a handover request acknowledge message containing a list of admitted UEs for handover among the plurality of UEs.

A method, apparatus, and computer program for continuing transmission during handover are presented. A communication connection is established between a source base station and a mobile relay base station comprising a distributed antenna system (DAS). The DAS includes multiple spatially distributed antenna units (DAUs), wherein at least part of the DAUs are used for forming a cluster of sub-cells within a coverage area of the mobile relay base station and at least part of the DAUs are used for communicating with a fixed cellular network infrastructure over multiple backhaul links. A first backhaul link is then handed over from the source base station to a target base station. After the handover, data transfer between the source base station and at least one backhaul link still linked to the source base station is continued, and remaining backhaul link(s) are released from the source base station according to a determined criterion.

A system and method is provided to facilitate communication and collaboration by considering the timing of a user's activities on one or more clients via accessing, from a centralized server, information about the user's client-server interactions. The systems and methods can harness existing protocols and data exchange used in legacy client-server applications for email, making available to one or more client-side message routing applications, information about a user's interactions with email across multiple clients. Applications include considering the time since the last client-server interaction to guide decisions about if, when, and how to route messages so as to limit the mobile relay of information a user has already seen, providing information to colleagues about a user's current or past “inbox presence,” and forecasting the time until a user will have access to a device or communication channel.

Group handover method and apparatus in a broadband wireless communication system which supports a mobile relay station are provided. A method of a serving base station for group handover of the mobile relay station includes when receiving a measurement report message from a relay station, determining whether the relay station is a mobile relay station of a simple type which forwards a signal; collecting handover related information of the mobile relay station and mobile terminals belonging to the mobile relay station, from pre-stored information; requesting handover of the mobile relay station and the mobile terminals by transmitting the collected handover related information to a target base station; and receiving a message indicating whether the handover of the mobile relay station and the mobile terminals is approved, from the target base station.

The invention discloses a switching method based on a mobile relay. The method comprises that a source donor base station (DeNB) as an intermediate node connects a Relay access network and an evolved packet core (EPC) when the mobile relay is switched; the Relay access network at least comprises a target DeNB and a mobile Relay; and the source DeNB forwards the data from the Relay access network to the EPC and forwards the data from the EPC to the Relay access network. The invention further discloses a mobile radio relay system. The method and the system of the invention realize the switching of the mobile Relay so as to support the movement of Relay.

A method and apparatus for selecting a mobility management entity (MME) in a wireless communication system including a mobile relay node is provided. A donor eNodeB (DeNB) receives a mobile relay indicator from the mobile relay node during a radio resource control (RRC) connection establishment procedure, receives a mobile relay support indication from an MME supporting the mobile relay node during an S1 setup procedure between the MME and the DeNB, and selects the MME supporting the mobile relay node among a plurality of MMEs.

A communication system comprising moving relay / s including base- and mobile-station functionality and a radio manager, all co-located, emergency moving relay / s further including a simulated stationary network that includes a simulated IP connectivity gateway communicating with a simulated mobility management entity and simulating the operation of a stationary network; the emergency moving relay being a root of a subtree including moving relay / s and mobile station / s, and utilizing its mobile-station functionality, base station functionality and radio manager for normal and emergency operation including communicating to a designated mobile station in the subtree each message received from a moving relay mobile in the subtree, the message having an IP address of the designated mobile station; or communicating to the simulated stationary network each message received from a moving relay / mobile station in the subtree and having an IP address not matching any mobile station in the subtree.

An apparatus and a method for handover in a broadband wireless communication system supporting a Mobile Relay Station (MRS) are provided. The method includes transmitting a Connection ID (CID) of Mobile Stations (MSs), the CIDs pre-allocated by a target BS, to the MSs; sending a resource allocation message comprising uplink resource allocation information for bandwidth request of the MSs, to the MSs; receiving a bandwidth request message which comprises security authentication information of each MS, from the MSs using an uplink resource allocated through the uplink resource allocation information; and aggregating bandwidth request messages of the MSs and sending a ranging request message comprising the security authentication information and bandwidth request information of the MSs to the target BS. Thus, the handover delay time, which is inevitable for the bandwidth request in the conventional connection set-up procedure, can be reduced, and the handover with the reliability guaranteed can be achieved by allowing the security related processing in the network re-entry procedure.

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.

A method includes controlling one or more radio access connections at a mobile gateway for at least one station associated with a mobile relay system, the mobile relay system providing a plurality of access technologies and being served by one or more donor cellular systems. The method further includes controlling address information of communication on the one or more radio access connections between at least one station and one or more core network elements associated with the one or more donor cellular systems.

A method for updating a tracking area in a wireless communication system is provided. The method may be performed between a mobile relay node and a user equipment. The mobile relay node transmits a tracking area change message to a user equipment (UE) on the mobile relay node, receives a tracking area change response message from the UE as a response to the tracking area change message, transmits a tracking area update (TAU) request message to a donor evolved NodeB (DeNB), receives a TAU accept message from a mobility management entity (MME), and transmits a TAU complete message to the UE.

A mobile communications system is described in which the network configures a mobile relay node that is mounted in a moving vehicle (such as a train) with expected tracking area information for the route along which the vehicle is expected to travel. UEs associated with the mobile relay node are provided with the list and do not perform tracking area updates if the movement of the vehicle corresponds to the stored list. Where advance knowledge of the route is not available, the mobile relay node is configured with a fixed tracking area and a fixed radio cell so that associated UEs do not detect a change in the tracking area or in the radio cell and so do not perform tracking area updates towards the network or the network does not need to control the UEs mobility while having a radio connection with the network.

A wireless communications network includes a base station and a number of mobile relay stations. Each mobile relay station within an area of coverage for the base station has associated with it a unique paging group identification value as well as the paging group identification value of the base station.

A repeater system and method for implementing within a mobile platform includes repeater circuitry configured for repeating signals between devices and signal sources such as base transceiver stations. The repeater circuitry has a plurality of configurable settings for controlling operation of the repeater circuitry. Movement sensors sense the movement of the mobile platform and controller circuitry is configured to use inputs from the movement sensors to determine a current path of the mobile platform and to compare the determined current path to the known path information for the mobile platform for determining the location of the mobile platform and repeater system to vary the configurable settings of the repeater system based upon the determined location. Other information such as identification information from a signal source or information from the mobile platform are also used to vary the configuration and configurable settings of the repeater system.

In the invention, a mobile relay station is added into the system; the radio self-networking mode is set in the dual-mode mobile terminal; as required, the dual-mode mobile terminal is switched into the radio self-networking mode from cellular network access mode or wideband radio access mode; under the radio self-networking mode, the dual-mode mobile terminal accesses the base station of mobile wideband radio access network or the base station of cellular network; the mobile relay station is used in relaying information between the dual-mode mobile terminal and the base station of wideband radio access network or the base station of cellular network, under the self-networking mode.

Managing a handover (e.g. over a Un or Uu connection or interface) of a mobile (moving) relay, MRN, from an eNB (source eNB) to another eNB (target eNB). The source eNB or donor eNB (DeNB) may provide a backhaul link to the mobile relay, MRN, and the MRN may provide an access link to a user equipment (UE). To manage the handover, access information (e.g. Donor eNB, DeNB, cell list) may be received (from an operation and maintenance entity, OAM), and a determination may be made regarding whether one or more target eNBs may be capable of handling the relay based on the access information (i.e. whether it is relay capable, relay accessible, supports relays or not). A target eNB, that may be capable of handing the relay based on the determination, may be selected from the one or more target eNBs to handover the relay to where the selected target eNB may have a communication (backhaul) link with the source eNB. The relay may be handed over from the source eNB to the selected target eNB using the communication link between the source eNB and selected target eNB. The relay may be configured to use radio access network (RAN) shar not ing, a mobility management entity (MME) may be selected; and / or a EUTRAN radio access bearer (E-RAB) may be modified.

A method for operating a wireless communication system including a mobile relay station group, a base station group, and an authentication server, includes: configuring, by the authentication server, group information into the mobile relay station group and the base station group; requesting, by the base station group, group authentication data for the mobile relay station group from the authentication server; and performing authentication between a member of the mobile relay station group and a member of the base station group and generating an authentication key individually by the member of the mobile relay station group and the member of the base station group. Also disclosed is a system for carrying out the method.

The embodiment of the invention discloses three MS network access methods, a wireless communication system, a mobile relay station and a base station. In the first one, MRS and BS distribute CIDs to MS respectively, MRS establishes the mapping relation between two sets of CIDs, MRS transfers mutual information between BS and MS according to the mapping relation, BS updates group information according to the information sent by MRS. In the second one, MRS is connected with BS through a tunnel, MRS distributes CIDs to MS, MRS exchanges information with BS through a tunnel therebetween in a network access flow, BS updates group information according to the information sent by MRS. In the third one, information exchange of the network access flow between MS and MRS is realized, BS is only used for maintaining group information and completing information exchange between MRS and a gateway of an access service network. The methods, the wireless communication system, the mobile relay station and the base station of the invention can reduce air interface signaling spending during the group moving handover process.

The invention discloses a full-duplex unmanned aerial vehicle mobile relay system based on minimization of outage probability and a path optimization method thereof. The full-duplex unmanned aerial vehicle mobile relay system based on the minimization of outage probability comprises a single antenna source node, a single antenna destination node and a single antenna unmanned aerial vehicle mobilerelay node; wherein the unmanned aerial vehicle mobile relay node operates in a full-duplex decoding and forwarding mode, flies according to a certain path within a specified flight time, and forwardsthe information of the source node to the destination node. The path optimization method establishes a mathematical model considering the flight speed constraints of the unmanned aerial vehicle, taking the unmanned aerial vehicle flight path as the optimization variable, and aiming at minimizing the total interruption probability of the system. The path optimization method uses the first order Taylor series expansion manner to transform the original optimization problem into a standard twice constrained quadratic programming problem, and then solves with the Lagrangian duality theory and thesubgradient method to obtain a closed form solution of the optimal flight path of the unmanned aerial vehicle relay node, which satisfies the minimization of the outage probability.

It is determined whether a first mobile station (102) should receive multicast communications. A control message is sent to at least one of the first mobile station (102) and a second mobile station (104). The control message initiates a mobile relay of multicast communications received at the second mobile station (104) to the first mobile station (102) via a proximal communication technology.

The invention relates to personal radio communications and can be used in a mobile telephone communications system. The mobile communications system includes a mobile communication means 1 for transmitting messages either directly by generating an electromagnetic radiation, or through a mobile repeater 3 by generating an auxiliary flux. The mobile communication means 1 receives data either directly from a base transceiving station 9, or from the repeater 3 using an additional auxiliary radiation generated by the mobile repeater.

The invention relates to a wireless communication command system for an emergency rescue scene. The system comprises a scene information acquisition and wireless transmitting portable device, a multi-frequency point wireless access and transmitting device, a wireless receiving device and scene information processing equipment, wherein the wireless receiving device is connected with the scene information processing equipment and directly receives signals transmitted by the scene information acquisition and wireless transmitting portable device; and the multi-frequency point wireless access andtransmitting device is connected with the wireless receiving device, receives the signals transmitted by the scene information acquisition and wireless transmitting portable device, and forwards the received signals to the wireless receiving device. The system can realize wireless audio and video command of a disaster scene aiming at a complex environment, fuse audio, video and data transmission together by using the international advanced wireless communication technology, avoid wireless shielding problem under the complex environment by adopting the advanced mobile relay idea, prolong the length of an information communication link, and strengthen the wireless signal intensity.