Abstract: Provides apparatus, systems and methods for adapting a first and second transmission parameter R, P in a transmitting node of a data communication system to the current link quality of a data communication channel. A method comprises in the transmitting node counting the number of successful transmissions s, each successful transmission bases on a receipt of an acknowledgment “ACK”, and comparing the number of successful transmissions s against a threshold value Smax. In the event of reaching the threshold value Smax and operating with the first and second transmission parameter R, P in a predetermined parameter space, the method further comprises adapting at least one of the first and second transmission parameters R, P in dependence on a critical value that due to the current link quality corresponds to a temporarily unsupported value of one of the first and second transmission parameters R, P.

Abstract: A sensor network has a plurality of wireless sensors which transmit to an intermediate receiving device which relays data to a central server. A method is provided for receiving data packets at the intermediate receiving device from a plurality of the transmitting devices. Data packets are sensed on a communication medium at the receiving device and the total traffic intensity of data packets from the transmitting devices is estimated. A detection threshold for data packets is provided and adapted as a function of the total intensity. The receiving device receives data packets with a signal strength above the current detection threshold.

Abstract: The present invention discloses an apparatus and method for adapting a transmission parameter in a transmitting node of a data communication system to the current link quality of a data communication channel. The adapted transmission parameter is selected by the transmitting node from a set of transmission parameters in dependence on a number of successful transmissions. The number of successful transmissions is compared in the transmitting node against one of a first threshold value corresponding to a first state of the transmitting node and a second threshold value corresponding to a second state of the transmitting node.

Abstract: The invention relates to a method and an arrangement for maintaining an organized and automated archiving and retrieval system including a personal bibliography of original documents or other original real objects as well as an electronic archive containing copies of such original real objects with guaranteed access. Essentially this is done by establishing a machine and/or human readable “unique identifier” (UID) distributed with each original real object, a so-called personal archive allowing a person (or a group of persons) to maintain a personal bibliography, a managed storage containing electronic copies of the distributed original real objects, and means for a controlled, but guaranteed access to the stored electronic copies.

Abstract: The invention is directed to a method of making communication or information services via a telecommunication network available to service users.

Abstract: A telephone session between a calling person and a called person uses a call-related information segment which has been prepared by the calling person to inform the called person of the calling person and the subject of the session. The call-related information is transmitted to the called person and outputted there by use of an output unit, alerting the called person of the nature of the telephone session without the called person entering into the telephone session.

Abstract: A method of operating an availability service in a telecommunication system interconnecting a legacy telephone system with at least one presence system, said legacy telephone system including a plurality of terminals (T1 . . . T10), at least some (T1,T2) of which are terminals of subscribers to said availability service, said method including: (a) continuously monitoring each subscriber terminal (T1,T2) for a change of a call status of said subscriber terminal from the presence of a call to the absence of a call; (b) generating a first or “high availability” signal when said call status of said subscriber terminal changes from said presence of a call into said absence of a call; (c) monitoring an interval of time beginning with said first signal; (d) generating a second or “availability unknown” signal after a predetermined time period &tgr; within said interval; and (e) making said availability signals accessible to any interconnected presence system.

Abstract: A distributed multipoint conferencing system (3) comprises a plurality of participating terminals (31;32;33) for sending and receiving media streams in a conferencing interchange; the system further includes at least one multipoint distributor (30) (MD) connected to one terminal (31) for receiving at least one or all media streams from that terminal (31) but not from any other of the participating (32;33); the multipoint distributor (30) is connected to the other participating terminals (32;33) for sending the media stream or streams received from the MD-associated terminal (31) to the other participating terminals (32;33).

Abstract: A method of operating an availability service in a telecommunication system interconnecting a legacy telephone system with at least one presence system, said legacy telephone system including a plurality of terminals (T1 . . .

Abstract: A teleconferencing system comprised of one or more telecommunication systems; two or more subscriber terminals connected to the telecommunication systems; an electronic computing means connected any telecommunication system of the teleconferencing system. The electronic computing means, e.g. a server-type computer runs a conference initiating program; and a means for providing an availability signal associated with each subscriber terminal. The availability signal is accessible to the server and any participating telecommunication system is capable of cooperating with program for initiating a conference between the subscriber terminals; program initiates a conference between the subscriber terminals by attempting transmission of a conference call when such call is requested by any of the subscriber terminals; the conference call is transmitted to each subscriber terminal as soon as its associated availability signal indicates availability of that terminal.

Abstract: The invention is directed to a method of making communication or information services via a telecommunication network available to service users.

Abstract: The invention relates to a method and an arrangement for maintaining an organized and automated archiving and retrieval system including a personal bibliography of original documents or other original real objects as well as an electronic archive containing copies of such original real objects with guaranteed access. Essentially this is done by establishing a machine and/or human readable “unique identifier” (UID) distributed with each original real object, a so-called personal archive allowing a person (or a group of persons) to maintain a personal bibliography, a managed storage containing electronic copies of the distributed original real objects, and means for a controlled, but guaranteed access to the stored electronic copies.