# US 8,787,333 B2 · Medium reservation announcement

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- Number: US 8,787,333 B2
- Document ID: US8787333B2
- Status: Granted
- Kind: B2
- Application number: 12/668,037
- Filed: 2008-07-10
- Published: 2010-08-12
- Granted: 2014-07-22
- Earliest claimed: 2007-07-17
- Assignees: Koninklijke Philips N.V.
- Applicants: Theodorus J. J. Denteneer; Guido R. Hiertz; Bernhard Walke
- Inventors: Theodorus J. J. Denteneer; Guido R. Hiertz; Bernhard Walke
- Web page: https://patentgrep.com/patent/US8787333B2

## CPC

- H04W 74/0816: with collision avoidance
- H04W 48/12: using downlink control channel
- H04W 74/002: {Transmission of channel access control information}
- H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In wireless meshes, mesh points announce reservation of the wireless medium in beacon frame. Each mesh point determines scheduled reservation of the medium for transmission of the future beacon frames and scheduled reservations of the medium for data communication with the station The station further aggregates the reservations into a single element: an medium occupation element and integrates this element into the beacon frame for future transmission to nearby mesh points.

## Claims

### Claim 1

A method for announcing reservation of a wireless medium in a wireless network, the method comprising:
determining beacon timing information regarding a reservation of the medium for transmission of a beacon frame by a station in the network and reservation timing information regarding a reservation of the medium for data communication with the station;
aggregating the beacon timing information and reservation timing information into a medium occupation element;
including the medium occupation element in a plurality of information elements which comprise a beacon frame; and
transmitting the beacon frame.

### Claim 2 (depends on 1)

The method of claim 1, wherein the wireless network is a wireless mesh according to the IEEE 802.11s standard and the station is a mesh point.

### Claim 3 (depends on 1)

The method of claim 1, wherein the medium occupation element includes a MAC address of the station.

### Claim 4 (depends on 1)

The method of claim 1, wherein the method further comprises:
receiving a medium occupation element from a nearby station regarding aggregated medium reservation for beacon transmission by the nearby station and for data communication with the nearby station; and
further transmitting in the beacon frame information on the nearby station's reservations extracted from the medium occupation element of the nearby station.

### Claim 5 (depends on 4)

The method of claim 4, wherein the information on the nearby station's reservations is the medium occupation element received from the nearby station.

### Claim 6 (depends on 4)

The method of claim 4, further comprising including respective medium occupation elements of all nearby stations in the plurality of information elements in the beacon frame.

### Claim 7 (depends on 1)

The method of claim 1, wherein the medium occupation element includes a reservation counter representative of a number of individual reservations of the medium for sets of periodic contiguous periods of time.

### Claim 8 (depends on 1)

The method of claim 1, wherein the medium occupation element includes an indicator on whether the individual reservation of the medium concerns a transmission of a beacon frame or a communication with the station.

### Claim 9 (depends on 1)

The method of claim 1, wherein the medium occupation element includes one of the following for each individual reservation: a duration, a periodicity and an offset.

### Claim 10 (depends on 1)

The method of claim 1, wherein the beacon frame is broadcast to nearby stations in the network.

### Claim 11

A station in a wireless network, comprising:
a processing unit configured to determine beacon timing information regarding a reservation of the medium for transmission of a beacon frame by the station and reservation timing information regarding a reservation of the medium for data communication with the station, aggregate the beacon timing information and reservation timing information into a medium occupation element, and include the medium occupation element in a plurality of information elements which comprise a beacon frame; and
a transmitter configured to broadcast the beacon frame.

### Claim 12

A wireless network comprising a plurality of stations, each station comprising:
a processing unit configured to determine beacon timing information regarding a reservation of the medium for transmission of a beacon frame by the station and reservation timing information regarding a reservation of the medium for data communication with the station, aggregate the beacon timing information and reservation timing information into a medium occupation element, and include the medium occupation element in a plurality of information elements which comprise a beacon frame; and
a transmitter configured to transmit the beacon frame.