Abstract: A method for transmitting data in a wireless radio network having a multiplicity of base stations for wirelessly sending and receiving data, wherein the base stations are wirelessly networked such that each base station can communicate wirelessly with one or more adjacent base stations. Broadcast messages are transmitted between a mobile station for wirelessly sending and/or receiving data and the base stations and broadcast messages are also forwarded between the base stations. These broadcast messages do not have an associated explicit connection between two units in the radio network. Moreover, the mobile station which receives a broadcast message can process this message regardless of the base station from which it originates. This avoids so-called “hand offs,” which are used in the prior art to associate a mobile station with a new base station when the mobile station moves out of range of the earlier base station.

Abstract: In a method for determining link and route metrics, in order to determine an optimal path for time-critical transmission such as video telephony or VoIP, for use in routing protocols, the route metric is calculated as the product of the link metrics, wherein the link metrics in turn are calculated from the formula L=1?(1?A1*A2)^(W+1), wherein L is the link metric, A1 and A2 are the data packet arrival rates in the outgoing and incoming directions of a link, and W is the maximum number of retransmissions per link. The route metric is optimal for the route which has the lowest number of lost packets.

Abstract: A method determines a route in distance value for use in routing protocols. An optimum route is determined for time-critical transmissions such as videotelephony or VoIP. For this purpose, the route distance value is calculated as the product of the link metrics for the links of a route, said link metrics being the product of data packet arrival rates. This value is the optimum value for the route which requires the lowest number of repeated packet transmissions (retransmissions). Optionally, an additional factor can be inserted in the link metrics, which factor ensures that the length of a route is also taken into consideration.

Abstract: A method for transmitting data in a wireless radio network having a multiplicity of base stations for wirelessly sending and receiving data, wherein the base stations are wirelessly networked such that each base station can communicate wirelessly with one or more adjacent base stations. Broadcast messages are transmitted between a mobile station for wirelessly sending and/or receiving data and the base stations and broadcast messages are also forwarded between the base stations. These broadcast messages do not have an associated explicit connection between two units in the radio network. Moreover, the mobile station which receives a broadcast message can process this message regardless of the base station from which it originates. This avoids so-called “hand offs,” which are used in the prior art to associate a mobile station with a new base station when the mobile station moves out of range of the earlier base station.

Abstract: When setting up a wireless network formed of several communication terminals, it is usual for the communication terminals to be devoid of information on local topology. In large wireless mobile environment networks it is advisable to create an independent large-network setup, wherein individual communication terminals which are not yet connected and/or partial networks are integrated. The method enables automatic dynamic, large-network organization, taking into account communication terminals which are not yet connected. This is achieved by exchanging messages between the communication devices to determine local topology information independently and by integrating the thus enhanced isolated individual communication terminals and partial networks.

Abstract: In a method for determining link and route metrics, in order to determine an optimal path for time-critical transmission such as video telephony or VoIP, for use in routing protocols, the route metric is calculated as the product of the link metrics, wherein the link metrics in turn are calculated from the formula L=1?(1?A1*A2)? (W+1), wherein L is the link metric, A1 and A2 are the data packet arrival rates in the outgoing and incoming directions of a link, and W is the maximum number of retransmissions per link. The route metric is optimal for the route which has the lowest number of lost packets.

Abstract: 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.

Abstract: A routing method for a network burdens the network with less routing messages. According to said method, routing hellos for calculating the link metrics are used. The method thus removes the need for metric beacons.

Abstract: 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.

Abstract: A method determines a route in distance value for use in routing protocols. An optimum route is determined for time-critical transmissions such as videotelephony or VoIP. For this purpose, the route distance value is calculated as the product of the link metrics for the links of a route, said link metrics being the product of data packet arrival rates. This value is the optimum value for the route which requires the lowest number of repeated packet transmissions (retransmissions). Optionally, an additional factor can be inserted in the link metrics, which factor ensures that the length of a route is also taken into consideration.

Abstract: When setting up a wireless network formed of several communication terminals, it is usual for the communication terminals to be devoid of information on local topology. In large wireless mobile environment networks it is advisable to create an independent large-network setup, wherein individual communication terminals which are not yet connected and/or partial networks are integrated. The method enables automatic dynamic, large-network organization, taking into account communication terminals which are not yet connected. This is achieved by exchanging messages between the communication devices to determine local topology information independently and by integrating the thus enhanced isolated individual communication terminals and partial networks.