Abstract: A network array (100) comprises a first network (101) having a plurality of first nodes (103, 104, 109), comprises a second network (102) having a plurality of second nodes (106, 109), and comprises a forwarder node (109). The forwarder node (109) constitutes one of the first nodes (103, 104, 109) and constitutes one of the second nodes (106, 109) to form a communication interface between the first network (101) and the second network (102). The forwarder node (109) has an implemented data transmission scheduling management function capable of distinguishing between data to be transmitted between the first network (101) and the second network (102) and data to be transmitted within the first network (101) or within the second network (102). The forwarder node (109) is adapted to communicate with the first network (101) using a first operation frequency and is adapted to communicate with the second network (102) using a second operation frequency which is different from the first operation frequency.

Abstract: A network array (200) comprises a first network (201) having a plurality of first nodes (203, 204, 209), comprises a second network (202) having a plurality of second nodes (206, 209) and comprises a forwarder node (209). The forwarder node (209) constitutes one of the first nodes (203, 204, 209) and constitutes one of the second nodes (206, 209) to form a communication interface between the first network (201) and the second network (202) in such a manner that the forwarder node (209) functions as a slave in the first network (201) and as a master in the second network (202). The forwarder node (209) is adapted to communicate with the first network (201) using a first operation frequency and is adapted to communicate with the second network (202) using a second operation frequency which is different from the first operation frequency.

Abstract: In a wireless mesh network, an algorithm is used by mesh points in the network to predict the success of and interference created by a new transmission opportunity. In particular, it is provided a method for mesh points, in a mesh network, to determine whether to transmit to another mesh point simultaneously while another transmission is taking place on the same communication link. A mesh point should not transmit to another mesh point if the mesh point's transmission interference disturbs a simultaneous transmission from another mesh point. Furthermore, a transmitting mesh point should not transmit to a receiving mesh point if the transmission will be disturbed at the receiving mesh point from interference from a simultaneous transmission from another mesh point.

Abstract: A fast method for allocating those channels or subcarriers of a multicarrier network to an ahead lying transmission is to let a transmitting terminal and a receiving terminal which intend to access the medium determine the status of the channels or subcarriers that are within their reception range and send a signal indicating the determined status to the corresponding terminal which will select those channels or subcarriers for the eventual transmission which fit best. Other terminals within the transmission range of the transmitting or the receiving terminal respect the reservation and wait for the current transmission to find out which channels or subcarriers are actually used.

Abstract: Method for reservation of a medium in a radio communication network for data transmission between stations (A-E) of the network comprising at least one station (A, B, E) operating according to a first protocol (DRP) and a second station (C, D) operating according to a second protocol (802.11), the method comprises the steps of: providing a contention free period (23) within the first and second protocol; performing the reservation of the medium for the first station (A, B, E) according to the first protocol; and performing the reservation of the medium for the second station (C, D) according to the second protocol, announcing the contention free period for the first and second protocol by use of the same signal (21, 22, 31, 33). In particular a beacon signal is used, wherein the beacon includes a signal (488) which is recognized and accepted by the second stations (C, D). Further information (404) is added into the beacon frame (41) for reserving reservation periods (23) for the first stations (A, B, E).

Abstract: A method of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element A method (300) of operating a network node (101-104) of a network system (100), comprising the steps of generating (305) a signal to be transmitted, selecting (310) one of a plurality of communication channels (105-108) of the network system (100) for transmitting the signal, and, in case that the selected channel (105-108) is not ready for transmitting the signal, selecting (345) another one of the plurality of communication channels (105-108) for transmitting the signal.

Abstract: A method for facilitating coexistence of wireless technologies competing for the same bandwidth includes, with a first component (14) residing in a first wireless network (20), initializing the first wireless network (20) with a superframe period (38) based on a superframe period (28) of a second wireless network (10) and communicating information over the first wireless network (20) within the Contention Free Period period (46) of the superframe period (38) of the first wireless network (20), and, with a second component (4) residing in the second wireless network (10), communicating information over the second wireless network (10) within the Contention Access Period (44) of the superframe period (38), the Contention Free Period (46) and the Contention Access Period (44) being distinct regions of the superframe period (38) of the first wireless network (20).

Abstract: A network array (200) comprises a first network (201) having a plurality of first nodes (203, 204, 209), comprises a second network (202) having a plurality of second nodes (206, 209) and comprises a forwarder node (209). The forwarder node (209) constitutes one of the first nodes (203, 204, 209) and constitutes one of the second nodes (206, 209) to form a communication interface between the first network (201) and the second network (202) in such a manner that the forwarder node (209) functions as a slave in the first network (201) and as a master in the second network (202). The forwarder node (209) is adapted to communicate with the first network (201) using a first operation frequency and is adapted to communicate with the second network (202) using a second operation frequency which is different from the first operation frequency.

Abstract: Method for reservation of a medium in a radio communication network for data transmission between stations (A-E) of the network comprising at least one station (A, B, E) operating according to a first protocol (DRP) and a second station (C, D) operating according to a second protocol (802.11), the method comprises the steps of: providing a contention free period (23) within the first and second protocol; performing the reservation of the medium for the first station (A, B, E) according to the first protocol; and performing the reservation of the medium for the second station (C, D) according to the second protocol, announcing the contention free period for the first and second protocol by use of the same signal (21, 22, 31, 33). In particular a beacon signal is used, wherein the beacon includes a signal (488) which is recognized and accepted by the second stations (C, D). Further information (404) is added into the beacon frame (41) for reserving reservation periods (23) for the first stations (A, B, E).

Abstract: A fast method for allocating those channels or subcarriers of a multicarrier network to an ahead lying transmission is to let a transmitting terminal and a receiving terminal which intend to access the medium determine the status of the channels or subcarriers that are within their reception range and send a signal indicating the determined status to the corresponding terminal which will select those channels or subcarriers for the eventual transmission which fit best. Other terminals within the transmission range of the transmitting or the receiving terminal respect the reservation and wait for the current transmission to find out which channels or subcarriers are actually used.

Abstract: A method of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element A method (300) of operating a network node (101-104) of a network system (100), comprising the steps of generating (305) a signal to be transmitted, selecting (310) one of a plurality of communication channels (105-108) of the network system (100) for transmitting the signal, and, in case that the selected channel (105-108) is not ready for transmitting the signal, selecting (345) another one of the plurality of communication channels (105-108) for transmitting the signal.

Abstract: A method for facilitating coexistence of wireless technologies competing for the same bandwidth includes, with a first component (14) residing in a first wireless network (20), initializing the first wireless network (20) with a superframe period (38) based on a superframe period (28) of a second wireless network (10) and communicating information over the first wireless network (20) within the Contention Free Period period (46) of the superframe period (38) of the first wireless network (20), and, with a second component (4) residing in the second wireless network (10), communicating information over the second wireless network (10) within the Contention Access Period (44) of the superframe period (38), the Contention Free Period (46) and the Contention Access Period (44) being distinct regions of the superframe period (38) of the first wireless network (20).

Abstract: A mobile ad hoc network describes an ad hoc network in which each connection point or network node changes its position dynamically. Such a network is known for rapid changes of the network topology whereas each node is able to join and leave the network dynamically and often without warning. These dynamic changes can lead to the degrading of the stability of links between the network nodes. According to the present invention, a method is provided to smoothly replace degrading links with stable ones. Advantageously, this results in higher network stability and offers a high flexibility for routes in a dynamically changing network.

Abstract: A network array (100) comprises a first network (101) having a plurality of first nodes (103, 104, 109), comprises a second network (102) having a plurality of second nodes (106, 109), and comprises a forwarder node (109). The forwarder node (109) constitutes one of the first nodes (103, 104, 109) and constitutes one of the second nodes (106, 109) to form a communication interface between the first network (101) and the second network (102). The forwarder node (109) has an implemented data transmission scheduling management function capable of distinguishing between data to be transmitted between the first network (101) and the second network (102) and data to be transmitted within the first network (101) or within the second network (102). The forwarder node (109) is adapted to communicate with the first network (101) using a first operation frequency and is adapted to communicate with the second network (102) using a second operation frequency which is different from the first operation frequency.

Abstract: Method, frame definitions (300 400 500 700 800 1000 1200 1300 1400) and system for transmission of an aggregation of packets which includes a plurality of Medium Access Control (MAC) Protocol Data Units (MPDUs) or PLCP (Physical Layer Convergence Protocol) Protocol Data Units (PPDUs) intended for one or several receivers and transmitted at one or several different Physical (PHY) rates. In some aspects of the invention, a pre-amble, rsp. mid-amble (415.i 515.i 715.i 815.i 1015.i 1215.i 1315.i) is transmitted in-between each or between multiples of MPDUs or PPDUs allowing receiver devices to go into sleep mode and wake-up during the aggregate or packet burst. Furthermore, information is transmitted at the beginning of the aggregate/packet burst, which allows devices to deduce the position of MPDUs/PPDUs or multiples of MPDUs/PPDUs in the aggregate. MPDUs or PPDUs are grouped in order to enable efficient sleep times of the receiving devices.

Abstract: The invention relates to a wireless communication system comprising a master station, a first additional station, and a second additional station, whereby the master station is operable to communicate with the first and second additional stations in a first high-speed mode utilizing a first channel and at least a second channel and in a second low-speed mode utilizing either the first channel or the second channel, the first additional station is operable to communicate in the first mode utilizing the first channel and at least the second channel, and the second additional station is arranged to communicate in the second mode utilizing either the first channel or the second channel, characterized in that master station is arranged to define a plurality of first time slots on the first channel and a plurality of second timeslots on the second channel for communication in the first mode, and a plurality of third time slots on the first channel and a plurality of fourth time slots on the second channel for commu

Abstract: The subnets of a radio network are separated by different scrambling codes. A signalling frame comprises information concerning the spreading code used on the neighbouring or second subnet which can therefore be reserved for a multi hop connection in the first subnet as well. Therefore, in the easiest case the forwarding device only needs to change the scrambling code of the data flow to that of the following subnet and can keep the same spreading code.

Abstract: Wireless communication system comprising a master station, a first additional station, and a second additional station, whereby the master station is operable to communicate with the first and second additional stations in a first high-speed mode and a second low-speed mode, the first station is operable to communicate with the master station in the first mode and the second mode, and the second additional station is arranged to communicate in the second mode, characterized in that the first additional station is arranged to switch from the first mode to the second mode upon detection of a communication request from the second additional station to the first additional station.

Abstract: A method of distributed medium access control wherein a device that intends to send data first monitors the medium, then pre-occupies a slot and only in case a collision has not occurred starts sending the data. A method for re-organizing the device's sequence for the medium access by using a busy priority signal wherein the device with the highest priority occupies the unused slot and updates it's slot number accordingly. A method for avoiding collision wherein a guard slot is generated just before the beginning of the MFS. A method for synchronizing a device by sensing the medium for a MFS or an EFS. A frame structure with a MFS, an EFS and a transmission portion with both a part for real-time and a part for non real-time transmission.

Abstract: An encryption method and decoding method for a digital transmission system, in which the digital data stream comprises an alternating sequence of training sequences and data symbols, and the training sequences are dynamically coded. At the receiving end, a decoding code (Vn) is generated by a code generator as a function of an encryption key (200). This decoding code is sent to a correlator, where it is mixed with the encryption code Vn extracted from the digital data stream. The correlator generates a correcting variable to compensate the offset in respect of time or frequency between the sender and receiver. Encryption is achieved through the alteration of the code used during the transmission.