Abstract: A method of reducing interference in a communication system supporting multiple radio channel communication scheme, where a communication link can be established between a transmitter and a receiver. The transmitter first determines interference level at the transmitter, and then based on the determined interference level, performs link adaptation. The link adaptation comprises applying channel bundling for adapting the communication link so as to transmit simultaneously on at least two radio channels from the transmitter to the receiver.

Abstract: A method of reducing interference in a communication system supporting multiple radio channel communication scheme, where a communication link can be established between a transmitter and a receiver. The transmitter first determines interference level at the transmitter, and then based on the determined interference level, performs link adaptation. The link adaptation comprises applying channel bundling for adapting the communication link so as to transmit simultaneously on at least two radio channels from the transmitter to the receiver.

Abstract: In a mesh network a multiband OFDM Alliance (MBOA) system provides higher channel access efficiency through a Distributed Reservation Protocol (DRP). A MBOA Physical layer (PHY) and a MBOA Medium Access Control (MAC) are used to increase the efficiency of the mesh network.

Abstract: In a mesh network a multiband OFDM Alliance (MBOA) system provides higher channel access efficiency through a Distributed Reservation Protocol (DRP). A MBOA Physical layer (PHY) and a MBOA Medium Access Control (MAC) are used to increase the efficiency of the mesh network.

Abstract: The invention relates to a method and a packet switch for synchronising port controllers (1) with cross-connection means (40). By switching cross-connection means from loopback configurations (41a, 43a) to no-transmission configurations, consecutively an offset counter (32) in a port controller (1) may be altered until transmission of cells is synchronised, so as cells are switched within said cross-connection means (40) within transmission periods.

Abstract: In order to provide a communication system as well as a vehicle comprising such a communication system for communication between and among vehicles and a method for communication between and among vehicles moving in any different directions within the same area by means of at least one channel designed for transmitting at least one message, the channel comprising at least one code for communication of the vehicles within at least one cluster in which at least one group of vehicles are clustered, wherein interference is to be eliminated, the vehicle comprises directional antennas oriented in different directions in relation to the moving direction of the vehicle to enable the sending direction of the message to be allocatable to directions in relation to the moving direction of the vehicle and the channel is assigned to direction areas, north, east, south and west.

Abstract: This invention defines a medium access protocol for the support of mesh networking in wireless communications. It defines a phase for intra-cell and a phase for inter-cell traffic. During the inter-cell traffic a beacon phase is used for the reservation of transmissions. In this phase also information about the mesh topology is included and parallel transmission are supported. Even though this medium access protocol is intended to be proposed in standardization of IEEE 802.11 mesh networks (802.11) it could be used in any wireless mesh network.

Abstract: To improve a method of improving communication between mobile nodes in an ad-hoc wireless network and in particular to reduce the amount of data to be transmitted, all the nodes are organized into application-specific clusters and the information that is relevant to each application is stored in the head element of the cluster.

Abstract: In a mesh network a multiband OFDM Alliance (MBOA) system provides higher channel access efficiency through a Distributed Reservation Protocol (DRP). A MBOA Physical layer (PHY) and a MBOA Medium Access Control (MAC) are used to increase the efficiency of the mesh network.

Abstract: In order to provide a communication device (100) for communication between and among mobile nodes (10, 12, 14, 16) comprising at least one transmission unit (20) for communicating at least one message (22),—at least one receiver unit (30) for sensing at least one arriving message (32, 34, 36) being communicated by at least one neighbouring node (12, 14, 16), and at least one localisation unit (60) for determining and/or for monitoring the moving direction and/or the current position of the respective node (10, 12, 14, 16), wherein the amount of broadcast messages in inter-node communication, in particular in inter-vehicle communication, is reduced, it is proposed that each message (22; 32, 34, 36) being communicated between and among the nodes (10, 12, 14, 16) is assigned to at least one message type and/or message subject and - to at least one direction area relating to the moving direction of the node (10, 12, 14, 16) by which the respective message (22; 32, 34, 36) is transmitted, the moving direction bein

Abstract: A method of receiving messages which are transmitted from vehicle to vehicle and contain information relating to traffic is characterized in that information from received messages is only accepted when a number of identical items of information are received, wherein the number is greater in heavy traffic than in light traffic.

Abstract: In order to provide a communication system (100) as well as a vehicle comprising such a communication system (100) for communication between and among vehicles (10, 12, 14, 16, 18) and a method for communication between and among vehicles (10, 12, 14, 16, 18) moving in any different directions within the same area by means of at least one channel (90, 92) designed for transmitting at least one message (30, 32, 34, 36, 38), the channel (90, 92) comprising at least one code (80, 82, 84, 86) for communication of the vehicles (10, 12, 14, 16, 18) within at least one cluster (20, 22) in which at least one group of vehicles (10, 12, 14, 16, 18) are clustered, wherein interference is to be eliminated, it is proposed—that the vehicle (10, 12, 14, 16, 18) comprises at least one, preferably two or more directional antennas (40, 42, 44, 46) oriented in different directions in relation to the moving direction (M) of the vehicle (10, 12, 14, 16, 18), for example forward, backward and/or sideward, in order to enable the se

Abstract: The invention relates to a method and a packet switch for synchronising port controllers (1) with cross-connection means (40). By switching cross-connection means from loopback configurations (41a, 43a) to no-transmission configurations, consecutively an offset counter (32) in a port controller (1) may be altered until transmission of cells is synchronised, so as cells are switched within said cross-connection means (40) within transmission periods.

Abstract: A coupling device (switch) for a local network operating in the asynchronous transfer mode (ATM) which comprises a central cell memory (CCM) for buffer storage of packets (frames) formed by individual ATM cells and arriving on feed lines, a central memory control device for controlling the storage in the central cell memory (CCM) and the writing and reading processes of the packets into and from the central cell memory (CCM). The control device includes a counting circuit for counting the ATM cells arriving in the central cell memory (CCM) and a discarding circuit for discarding ATM cells packet by packet for preventing a congestion in the central cell memory (CCM).

Abstract: The invention relates to a packet switching system comprising at least a coupling device which comprises a main memory for buffering packets arriving by auxiliary lines, a main memory controller for generating addresses for the packets to be stored in the main memory and for controlling the write and read operations of the packets and a demulfiplexer controlled by the main memory controller for transporting the packets by trunk lines. The main memory controller comprises an address memory for producing an address for a write operation, buffers assigned to each trunk line, for buffering the addresses produced by the address memory, and a decoding device. The decoding device is provided for selecting a buffer for an address to be stored in dependence on the destination of the packet, for selecting a buffer for producing an address for the read operation from the main memory and for accordingly controlling the demultiplexer.

Abstract: An interconnection element for an asynchronous time-division multiplex transmission system which transmits cells supplied by auxiliary lines (14a to 14d) and destined for a trunk line (10). The element comprises cell filters (11a to 11d) coupled each to an auxiliary line. The filters pass the cells to be stored in intersection buffers (12a to 12d) coupled to each cell filter when the path identification is allocated to the trunk line for controlling the reading of the cells from the intersection buffers onto the trunk line the system includes allocation circuit comprises a chain of hierarchically structured allocation elements (13a to 13d) associated each to an intersection buffer and having each its control buffer (17a to 17d). When a cell is stored in the associated intersection buffer each allocation element stores a first status in the associated control buffer and the hierarchically lower allocation element a second status in the associated control buffers.