Koninklijke Philips Corporation N.V.

Nxp B.v.

Philips Lighting Holding B.v.

Koninklijke Philips Electronics N.v.

Philips Intellectual Property & Standards Gmbh

Jörg Habetha

Klaus Peter May

Guido Roland Hiertz

Olaf Wischhusen

Francesc Dalmases

Adolfo Jose Roque

Stefan Mangold

Marco Ruffini

Begonya Otal

Jörg Peetz

Yusuf Efe

Rajesh Shantaram Bagul

Adolfo J Roque

Francese Dalmases

A method of decentralized medium access control in a communications network consisting of a plurality of stations, wherein a sending station transmits a reservation request for a future transmission to an intended receiving station, said intended receiving station being in a reception range of said sending station, said reservation request signalling reservation information including starting point and duration of the transmission, defining a time period of said future transmission, and, in case of a multi-channel system, frequency or code of the channel of said future transmission, so establishing a reservation, and stations active in said reception range overhear said reservation request and other stations than said intended receiving station perform the actions of storing said reservation information locally and defer from medium access during the time period and on the channel of the future transmission.

Method of decentralized medium access control in a communications network

In an Access Point controlled wireless network, wherein one channel communication is ruled by an identifier associated with the Access Point, a method for direct communication between a first station and a second station, includes generating a second identifier by the first station, different from the identifier associated with the Access Point, and optionally choosing a different channel; sending, by the first station, an invitation message for direct communication carrying the second identifier and optionally the second channel to the second station; sending, by the second station, a response message acknowledging the invitation message; setting up direct communication between the first station and the second station using the second identifier and optionally the second channel.

Method for derect communication between a first station and a second station of a wireless network

Method of accessing a medium on a transmission system having at least two channels, in which a multi-channel device groups at least two channels for the purpose of increasing the bandwidth. The method enables multi-channel devices and single-channel devices to coexist by sending out a preamble and header on each individual channel before the channels are grouped, a single-channel device that may be scanning the channel thus detecting that the message that follows is not intended for itself.

Method for access to a medium by a multi-channel device

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

Network array, forwarder device and method of operating a forwarder device

The present invention relates to the connection of subnets which operate on different frequency channels and are connected by wireless forwarder stations. According to the present invention, a forwarding station periodically switches to the other frequency channel to remain there for a pre-defined presence duration, whereby jitters of the presence time caused by overlapping packet transmissions are compensated. According to the present invention, a presence and absence time of the forwarder station in the respective subnet is indicated by using signals relating to a power saving mechanism.

Network with subnets being connectable via bridge terminals

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

Interconnection of wireless networks using a master/slave node

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 () 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 (). In particular a beacon signal is used, wherein the beacon includes a signal () which is recognized and accepted by the second stations (C, D). Further information () is added into the beacon frame () for reserving reservation periods () for the first stations (A, B, E).

Method of distributive reservation of a medium in a radio communications network

The invention relates to a method of communication in a wireless communication system comprising a first station and at least a second station wherein each of the station for at least a part of the time controls the communication within the system. The first station encodes and transmits messages having a first format in a first mode using at least one communication channel or having a second format in a second mode using one communication channel. The first and second formats have a common part. The second station receives and decodes at least the common part of messages transmitted either the first mode or the second mode. The common part comprises information on one or more upcoming transmissions of the first station.

Distributed resource reservation in a wireless ADHOC network

In order to provide a device () as well as a method for event-triggered communication between and among a plurality of nodes (A, B, C, S), in particular between and among a plurality of mobile nodes, for example between and among a plurality of vehicles, where the aspect of acknowledging the messages is taken into consideration, it is proposed to address at least one message (M, M, M), in particular at least one identifying message (IM) and/or at least one acknowledging notification (AM), to at least one specific node (A, B, C, S), in particular by way of unicast transmission.

Event-triggered communication between nodes having a transmitter sending an identifying message and acknowledging notification

A method of providing a medium access control protocol using a listen before-talk scheme within a wireless network having a plurality of stations communicating over a channel, wherein a valid route from a source station to a destination station via at least one more station is determined, said method comprising: transmitting a data packet over said channel by a first station; receiving said data packet in a second station; analyzing data in said data packet by said second station whether said data packet is to be forwarded further; and if said data packet is to be forwarded further, prioritizing transmission of said data packet on said valid route.

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Aachen, Germany

Jörg Habetha