Koninklijke Philips Corporation N.V.

Lothar Stibor

Guido Roland Hiertz

Bernhard Walke

Hans-Juergen Reumerman

Gustaf Sebastian Max

Yunpeng Zang

Hans-Jurgen Reumerman

Zang Yupeng

Hong Ma

The present invention relates to a method of reducing beacon collision probability in a communication network supporting control channels comprising beacon periods divided into beacon slots, each beacon period being followed by a contention period. In the method a communication device () operating in the communication network first chooses () an available beacon slot for transmission of a first type of beacon for exchanging network topology information with other communication devices operating in the communication network. Then the communication device transmits () a beacon of a second type comprising an identifier of the communication device and the chosen beacon slot for the transmission of the beacon of the first type, the beacon of the second type being transmitted in the contention period.

Reducing beacon collision probability

A congestion control method for a communication system supporting layered radio channel structure for communication between at least a first communication device and a second communication device that offers a first and second types of service with corresponding first and second priority orders. The messages between devices include a preamble and a payload with each message being separated by at least a minimum allowable period. The first communication device generates a physical layer message pertaining to the first type of service, senses the radio channel idle for at least a period corresponding to the minimum allowable period between two messages, and transmits the physical layer message including a preamble indicative of the type of service the message pertains. The content of the preamble is detected by the second communication device within a communication range irrespective of the decoding state of the payload of the transmitted message.

Congestion control in a communication network based on the CSMA/CA protocol

In a mesh network a multiband OFDM Alliance (MBOA) system provides higher channel access efficiency through a Distributed Reservation Protocol (DRP). A MBOA Physical layer (PHY) and a MBOA Medium Access Control (MAC) are used to increase the efficiency of the mesh network.

Method for multi-channel resource reservation in a wireless mesh network

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Cologne, Germany

Lothar Stibor