Nec Europe Ltd.

Nec Corporation

Long Le

Andreas Festag

Peter Rost

Andreas Maeder

Roberto Baldessari

Wenhui Zhang

Konstantinos Samdanis

Marco Liebsch

Frank Zdarsky

Nikola Zahariev

Damiano Scanferla

Shiqiang Wang

Andreas Mäder

A method for supporting vehicular communication in a cellular-based communication system includes connecting at least one base station and a plurality of vehicles equipped with mobile communication devices. A centralized control entity coordinates packet transmissions of the vehicles. Adjustment of a packet transmission rate is done recursively, where parameters of packet transmission characteristics are measured and the control entity determines, based on the parameters of packet transmission characteristics, an optimal packet transmission rate. The vehicles and/or the control entity transmit packets use the optimal packet transmission rate.

Adaptive rate control for cellular-based vehicular networks

A method for resource management in a cellular communication network, wherein the network includes at least one base station per cell for a plurality of cells that operates in TDD (Time Division Duplex) transmission mode, wherein the base stations implement a respective UL/DL configuration mode in which frames are composed of a specific sequence of downlink DL, uplink UL and special S subframes, is characterized in that the base stations are operated such that neighboring base stations with adjacent and/or overlapping coverage areas employ different UL/DL configuration modes, wherein interference between neighboring base stations is taken account of by implementing power control on a subframe basis. Furthermore, a resource management system for use in a cellular communication network is described.

Method for resource management in a cellular communication network and resource management system

An Intelligent Transport System enabled cellular mobile network, comprising an infrastructure including a number of base stations (), and a number of vehicles () being equipped with both vehicle-to-vehicle and vehicle-to-infrastructure communication facilities, wherein particular events function as trigger for said vehicles () to send event specific warning messages to their serving base station () within said infrastructure, is characterized in that said base stations () comprise an evaluation module being configured to analyze and categorize warning messages received from any of said vehicles () according to predefinable criteria, and to estimate the number of vehicles () that may be affected by the event related to a warning message, and a control module for performing uplink radio resource adaptation dependent on said warning message's category and said estimated number of affected vehicles ().

Adaptation of radio resources allocation in an intelligent transport system enabled cellular mobile network and method for operating such network

A method for supporting routing decisions in a wireless mesh network, wherein the network () includes a multitude of wireless mesh nodes () and wherein at least two of the multitude of wireless mesh nodes () function as wireless mesh gateways () being connected to a wired infrastructure network () via wired and/or wireless links. With respect to an efficient routing of intra-mesh traffic that avoids congestions at the mesh gateways () as far as possible, the method includes the steps of performing a discovery mechanism for the wireless mesh gateways () to find and/or identify each other, establishing virtual wireless mesh links between the wireless mesh gateways () via the wired infrastructure network (), determining the characteristics of the virtual wireless mesh links, and announcing the characteristics to the wireless mesh nodes (). Further, a corresponding wireless mesh network with routing decision support is disclosed.

Method for supporting routing decisions in a wireless mesh network and wireless mesh network

A method for coordination of wireless transceivers of a network node, in particular for application in communication nodes of a vehicular network, wherein the network node is equipped with one or more wireless transceivers that are capable of simultaneously generating and/or receiving electromagnetic signals on different electromagnetic channels, the electromagnetic signals being potentially able to interfere with each other, is characterized in the steps of, for each pending packet transmission on a particular of the electromagnetic channels, checking the presence of ongoing and/or scheduled activity on one or more of the other of the electromagnetic channels, and deferring the pending packet transmission in case ongoing and/or scheduled activity is detected on one or more of the other of the electromagnetic channels, at least until the detected ongoing and/or scheduled activity on one or more of the other of the electromagnetic channels is completed. Furthermore, a corresponding network node is disclosed.

Method for coordination of wireless transceivers of a network node and network node

A method for performing communication in a self-organized wireless network, in particular a vehicular network, preferably based on the IEEE 802.11 MAC protocol, wherein the network includes a plurality of network nodes each being equipped with a communication system, wherein the communication systems generate periodic messages that are transmitted via a dedicated wireless communication channel, wherein each of the communication systems employs specific transmission parameters&#x2014;message interval and transmit power&#x2014;for transmitting the periodic messages, is characterized in that a reliability threshold for a maximum admissible load of the communication channel is defined, and that each network node, taking into consideration information on network nodes in its surrounding, establishes a relation between the message interval and the transmit power&#x2014;interval-power-relation&#x2014;such that the reliability threshold is not exceeded, wherein each network node applies its established interval-power-relation to adjust transmit power and/or message interval of its outgoing periodic messages.

Method for performing communication in a self-organized wireless network

A method for enabling multi-channel signaling in a communication network, including a multitude of communication nodes, wherein the communication among the communication nodes is performed by sending and receiving messages on communication channels including a control channel and at least one service channel, is characterized in that communication nodes embed information related to communication channel usage in messages sent on one of the communication channels, in particular the control channel, wherein the information indicates to others of the communication nodes a communication channel, in particular a service channel, intended to be employed for a specific service and/or application by the communication node having sent the respective message, and wherein communication nodes that receive a message including information related to communication channel usage forward the information by embedding the information in any of their own messages to be sent on a communication channel, in particular on the control channel.

Method for enabling multi-channel signaling in a communication network

A method for communication between nodes in a wireless network, in particular in a wireless ad hoc or mesh network, wherein multiple wireless channels with different frequency bands are provided and wherein the nodes are enabled to operate on the different channels is characterized in that each the node has assigned a home channel where it usually resides, wherein a node that leaves its home channel and switches to another of the multiple channels&#x2014;temporary operating channel&#x2014;provides information about the temporary operating channel on the node's home channel.

Method for communication between nodes in a wireless network

A method for controlling proxy binding of a mobile node in a network that supports network-based mobility management, wherein the mobile node includes at least one network interface that is employed for attaching to the network via an access router, wherein a mobile node's binding for a network interface is initiated by a binding request, is characterized in that the mobile node's binding for a new network interface is qualified as a preliminary binding, which is not employed for downlink data transmission, and that the mobile node's preliminary binding is activated, after the mobile node's new network interface has been configured.

Growing community of inventors

Dossenheim, Germany

Long Le