Koninklijke Philips Corporation N.v.

Joerg Habetha

Javier Del Prado Pavon

Kiran Srinivas Challapali

Sai Shankar Nandagopalan

Stefan Mangold

Guido Roland Hiertz

Francesc Dalmases

Begonya Otal

Georgios Orfanos

Markus Meng Hai Ang

Amjad Ali Soomro

Zhun Zhong

Klaus Peter May

Peter May

A 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

In a distributed Mac protocol having a slotted superframe () comprising at least one slotted beacon period () followed by a data transfer period (), a system and method is provided for creating and maintaining several beacon periods () at different positions in the superframe (). When joining the network () a device () either joins an existing beacon period () or creates a new beacon period () at a position in the superframe () that does not overlap with existing beacon periods () or reservation periods. Beacon periods () mutually protect each other by devices () announcing the neighboring beacon periods in their beacons.

Distributed beaconing periods for ad-hoc networks

In a centralized radio network consisting of several devices one device acts as master or network coordinator and has a transmission range. Basically, other devices of the network are able to adopt the role of a coordinator. This ability is used to enlarge the area of the network to a size larger than the transmission range of the master. A device asks its parent PNC to become a child PNC when a newly turned on device acts as a temporary PNC and broadcasts an initiation beacon indicating that it looks for a child PNC. The child PNC reports that it is available. The new device determines one of the available child PNCs to be its new master. The acknowledgment for the selected child PNC may be broadcasted to inform all the devices in the transmission range of the new device. The new device quits the role of the temporary PNC and associates to the existing network.

Method of connecting a new device to existing network

A system (), apparatus (), and method are provided for decentralized medium access control comprising an enhanced protocol for UWB MAC that includes a distributed reservation protocol (DRP) for distributed reservation of the medium (). The invention also relates to any wireless system () that uses a MAC protocol comprising a distributed reservation protocol. The method comprises devices () announcing medium reservations in beacons () and devices () that receive such announcements respecting the reservations.

System and method for an ultra wide-band medium access control distributed reservation protocol

In accordance with an example embodiment, method of wireless communication includes sending a beacon frame (), which includes at least one availability information element (AIE) (). The method also includes scheduling transmission and reception of traffic among a plurality of devices (), or systems (), or both based on the AIES from the receivers. A wireless network () is also disclosed.

Method to improve throughput and power consumption efficiency in wireless communication systems

The invention relates to a network with several subnetworks, which are organized either decentrally or centrally and can be connected in each case each by bridge terminals, a proxy terminal for a bridge terminal being set up in at least one of the subnetworks, which proxy terminal during an absence (dictated by frequency, time, code, or other factors) of the bridge terminal accepts all data directed to the bridge terminal or to be forwarded thereby, temporarily stores the data, and forwards said data to the bridge terminal when this is present again.

Network with several subnetworks

A system and method is provided for incorporating host-device communication in wireless IJSB (WUSB). A host () either uses a multicast Distributed Reservation Protocol (DRP) frame on behalf of connected devices () to reserve wireless channel resources, a unicast DRP frame or Enhanced Distributed Channel Access (EDCA) with a Poll Frame. In the case of a unicast DRP frame the number of unicast frames sent for reservation depends on the number of connected devices ().

System and method to enable WUSB application in a distributed UWB MAC

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.

Method for signaling the status of a subcarrier in a MC network and a method for adaptively allocating the subcarriers in a MC network

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 () of operating a network node (-) of a network system (), comprising the steps of generating () a signal to be transmitted, selecting () one of a plurality of communication channels (-) of the network system () for transmitting the signal, and, in case that the selected channel (-) is not ready for transmitting the signal, selecting () another one of the plurality of communication channels (-) for transmitting the signal.

Method of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element

A system, apparatus, and method are provided for dynamically selecting the data rate and/or transmit (TX) power. The method consists of devices periodically transmitting beacon frames in which they include data rate and/or TX power feedback for all senders of data streams, of which the devices are a receiver. The feedback may consist of recommended values for data rate and/or TX power or of channel state information. A sender chooses data rate and/or transmit power considering the feedback from the one or several receivers of the stream. The invention especially relates to systems based on an Ultra Wide Band Medium Access Control Protocol.

System and method for dynamic adaptation of data rate and transmit power with a beaconing protocol

A system (), device () (), and method are provided for power saving in a wireless communication network (), where all devices () regularly transmit a beacon () but can enter a hibernation mode in which they do not transmit beacons () and operate in a power-saving state. A device () announces the start () and duration () of the hibernation period in its beacon () prior to its hibernation period. The neighboring devices () keep information on the presence of the beacon () of the hibernating device () in their own beacons () in order to block the beacon slot () for the hibernating device () during its sleep time. Devices () furthermore include an information element () in their beacons () that contains all receiver addresses for which a device () has data pending to be sent.

System and method for hibernation mode for beaconing devices

A system (), device (), and method are provided for decentralized medium access control comprising periodic beacon () transmissions of all active devices in beacon slots () () (), grouping such beacon slots () () () in at least one contiguous dynamic beacon period (), and expanding or shrinking this at least one contiguous dynamic beacon period () depending on the number of occupied beacon slots () () (). The dynamic beacon period () adapts to devices () joining and leaving the network () as well as to collisions of beacon frames () on the medium ().

System and method for a dynamic beacon period in a MAC distributed reservation protocol

A distributed MAC protocol that includes a super-frame having a slotted Beaconing Period and a data transfer period. The super-frame includes a plurality of medium access slots which are assigned to the slotted Beaconing Period. The Beaconing Period length may be fixed or variable. The Beaconing protocol defines initializing an ad hoc network by means of starting a Beaconing Period, joining an existing Beaconing Period of ad hoc network and resolving collisions during the Beaconing Period.

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Aachen, Germany

Joerg Habetha