| Patent application number | Description | Published |
|---|
| 20090196227 | METHOD AND NETWORK NODE FOR ROUTING DATA PACKETS IN COMMUNICATION NETWORKS - A method routes data packets especially in wireless communication network formed by a plurality of network nodes. In order to transmit data packets from a first network node acting as a data packet source to a second network node acting as a data packet sink according to said method, the data packets are transmitted with the help of at least one additional communication network node that is dissociated from the source node, a first network message is transmitted from the source node at least to the additional network node so as to be successively forwarded to each additional network node until the additional network node corresponds to the sink node, the respective additional network node supplies routing data based on the first message in such a way that first data on a next network node on the way to the source node and the value of a first validity period in the actual additional network node is temporarily stored, and the value of the respective validity period is stored in such a way that all first data remains stored at least until a second network message which is sent by the sink node and confirms the first network message has been received by the source node. | 08-06-2009 |
| 20090265550 | Method and arrangement for transmitting data in a communication system that employs a multi-hop method - In a multi-hop network, packets are classified into header and user data for coded distribution. The header information, especially the multi-hop information, is separated in a coded manner from the user data, such that each network node need only decode the header in order to forward the packet. The header and the user data are guided, independently from each other, to the hardware of the respective device for separate coding, as if they were complete packets. A hardware accelerated coding of header and user data is possible using different keys. The header also contains integrity protection. | 10-22-2009 |
| 20090316668 | Method for generating extented route message, method for generating an extended route reply message, extended route request message, extended route reply message and first and second nodes - Route discovery of a route from a source node of an IEEE 802 connection to a destination node of an IEEE 802 connection, including a mesh network path with a source node of the mesh path and a destination node of the mesh path, is initiated by an extended route request message generated by the destination node. The extended route request message includes a flag that indicates whether the source node of the IEEE 802 connection is located inside or outside the mesh network, and either one source address of the source node, if the node is inside the mesh network, or two source addresses covering (a) the source address of the source node of the mesh path and (b) the source address of the source node of the IEEE 802 connection, if the node is outside the mesh network. | 12-24-2009 |
| 20100042831 | Method and System for Secure Transmission of Data in an Ad Hoc Network - Using at least one network consisting of at least one node, a multi-hop communication system is formed in which data are received and forwarded from a transmitting first node to a second node receiving the data via at least one third node interposed between the first and the second node. For transmission, the data are subdivided into packets that have a useful data portion (payload) and at least one first control data portion associated with the multi-hop method and a second control data portion associated with the network. The data are encrypted using a first public key determined by the first node and the second node, but only the useful data portion is encrypted using the first public key. | 02-18-2010 |
| 20100071049 | A METHOD FOR IDENTIFYING A TASK AUTHORIZATION - In an ad hoc mesh network, roles are assignment to the different network nodes, for example mesh point or mesh portal. The invention envisages that a network node identifies the certification and thus the permitted roles of another network node before it sends a message to said other network node. This ensures that the roles maintain their integrity and the security in the network is enhanced. | 03-18-2010 |
| 20100177753 | Method for Operating a Wireless Mesh Data Network with Multiple Nodes - A method for operating a wireless mesh data network with multiple nodes, wherein data frames are transmitted from a source node via one or more intermediate nodes to a destination node, wherein the source node, the one or more intermediate nodes, and the destination node constitute network nodes of the data network, wherein during transmission of a data frame, at least some of the network nodes which receive the data frame, using a precursor list for the destination nodes which is assigned to the destination nodes of the data frame, check whether the network node sending the data frame is in the precursor list, and wherein in the case of a positive result, the data frame is transmitted to a further network node, and in the case of a negative result, the data frame is thrown out or processed by an error recovery routine. | 07-15-2010 |
| 20100214960 | Method for establishing bidirectional data transmission paths in a wireless meshed communication network - The invention relates to a method for establishing a bidirectional data transmission path in a wireless meshed packet-switched communication network, wherein a logical topology in the form of at least one routing tree can be proactively established, wherein a root network node (R) of the routing tree sends first unidirectional data transmission paths regarding routing request messages (RANs) specifying the root network node (R) to the network nodes (M | 08-26-2010 |
| 20110110303 | METHOD AND DEVICE FOR CREATING AT LEAST ONE EXPANSION OF AN ASSOCIATION MESSAGE FOR WIRELESS MESH NETWORKS - The invention relates to a method for operating a mesh network, especially according to IEEE standard 802.11s, wherein the mesh network comprises a plurality of network nodes, which have outer edge nodes and inner network nodes. A first edge node forms a connection point for external first stations disjunctive to the network, and a second edge node forms a connection point for external second stations disjunctive to the network, wherein data packets are to be exchanged between the first and second stations. During a switch of an external station from one edge node to another edge node, especially from a coverage area of the first edge node to a coverage area of the second network node, the respective association information of the network nodes is updated by means of an association message while inserting a validity duration for the association of the external stations connected to the edge nodes. The invention also relates to a device for carrying out the method for operating a mesh network. | 05-12-2011 |
