Title of Invention	RADIO NETWORK AND METHOD FOR TRANSMITTING DATA IN A RADIO NETWORK
Abstract	In a radio network (1), in which devices (11 to 16) transmitting data seize one of a plurality of available frequency channels (x, y) for the duration of the data transmission, during breaks between the individual data transmissions the frequency channel (x) used is additionally seized in order to sign a1 the seizure of the frequency channel (x) to devices (22) of another radio network (2). In order to reduce the increased energy consumption associated with the additional seizure of the frequency channel (x), the seized frequency channel (x) is monitored for the attempt of seizure by a device (22) that is not part of the radio part (1) and the additional seizure of the frequency channel (x) is performed as a function of the detection of such an attempt.

Title of Invention

RADIO NETWORK AND METHOD FOR TRANSMITTING DATA IN A RADIO NETWORK

Abstract

In a radio network (1), in which devices (11 to 16) transmitting data seize one of a plurality of available frequency channels (x, y) for the duration of the data transmission, during breaks between the individual data transmissions the frequency channel (x) used is additionally seized in order to sign a1 the seizure of the frequency channel (x) to devices (22) of another radio network (2). In order to reduce the increased energy consumption associated with the additional seizure of the frequency channel (x), the seized frequency channel (x) is monitored for the attempt of seizure by a device (22) that is not part of the radio part (1) and the additional seizure of the frequency channel (x) is performed as a function of the detection of such an attempt.

Full Text	Description Radio network and method for transmitting data in a radio network The invention relates to a radio network comprising devices transmitting data, said devices seizing one of several available frequency channels for the duration of the data transmission and comprising a monitoring facility, which also seizes the used frequency channel during pauses between the individual data transmissions. The invention further relates to a method for transmitting data in a radio network, with devices in the radio network which transmit data seizing one of several available frequency channels for the duration of the data transmission and the used frequency channel also being seized during pauses between the individual data transmissions. A radio network and/or a method of this type are known from DE 199 46 540 A1. In many fields, like for instance in industry, science and medicine, self-organizing radio networks and networks without infrastructure, so-called ad-hoc networks, are used increasingly. A known example of a network of this type is the wireless local area network (WLAN) according to the IEEE 802.11 standard; Radio links can be established here at any point between devices (stations), without being dependent upon fixedly installed base stations or a defined radio network design. Links from a station to a target station can be realized in a plurality of possible ways either directly or by means of relay stations. A limited frequency range with a predetermined number of frequency channels is available for the communication, of which only a small number can in turn be used at the same time without any overlap. To prevent frequency conflict in the case of adjacent or spatially overlapping radio networks, it is known in the case of a radio network to be newly formed that by intercepting the available frequency channels it is determined which of them are already seized in order on this basis to be able to select a free frequency channel. Newly activated devices are however not able to establish the seizure of a frequency band if no data transmission takes place on this frequency at the time of its activation. With the radio network and/or method known from DE 199 46 540 A1 mentioned in the introduction, provision is made for this reason to additionally seize the used frequency channel during the pauses between individual data transmissions, for instance by means of a burst signal, in order to signal the seizure of the frequency channel to devices in another radio network. In particular, if data is only transmitted sporadically and/or at large time intervals, this known type of additional seizure of the frequency channel is however associated with a relatively high energy consumption. To solve this problem, provision is made in accordance with the invention for the monitoring facility to be embodied in the case of the radio network of the type cited in the introduction so as to monitor the seized frequency channel for an attempted seizure by means of device which does not belong to the radio network and to perform the additional seizure of the frequency channel as a function of the detection of such an attempt. For the method of the type cited in the introduction, the object is correspondingly achieved such that the seized frequency channel is monitored for an attempted seizure by means of a device which does not belong to the radio network and the additional seizure of the frequency channel takes place as a function of the detection of such an attempt. The additional seizure of the frequency channel used for the data transmission then only takes place if a device which does not belong to the radio network attempts to seize this frequency channel and this attempt is detected. The method according to the invention is thus particularly advantageous for such radio networks in which data is only transmitted sporadically and/or at large time intervals. The additional seizure of the frequency channel by means of the existing network can take place for instance in that a sequence of data is sent to an address which is not available in the existing radio network or that data is transmitted in the form of broadcasts and these are forwarded by all routers (relay stations) in the radio network, so that an additional seizure of the frequency channel is produced as a result. Furthermore, the transmission power can be increased during the increase in the seizure. The transmission power can then also be increased in particular if the attempt to seize the frequency channel is detected by a third-party device during a data transmission between the devices in the radio network, because the original transmission power was not sufficiently high for instance in order to signalize the seizure of the frequency channel to the third-party device. The monitoring of the frequency channel of the existing network can take place in a restricted fashion permanently or temporally in respect of the pauses between individual data transmissions if newly activated devices are not able to determine the seizure of the frequency band. The monitoring of the frequency channel of the existing network and/or the increase in the seizure of the frequency channel can take place by means of all or individual devices of the existing network or by means of separate devices provided herefor. To further explain the invention, reference is made below to the figures in the drawing, in which; Figure 1 shows a detailed exemplary embodiment of two locally overlapping radio networks and Figure 2 shows a detailed example of the course of the method according to the invention Figure 1 shows, in a highly diagrammatic manner, first radio network 1 consisting of devices 11 to 16 which communicate with one another in a frequency channel x and a second radio network 2 to be newly formed with the devices 21 to 25. As shown in Figure 2, the device 16 in the first radio network 1 communicates sporadically in the frequency channel x and monitors during the pauses therebetween whether a device which does not belong to network 1 is attempting to seize the frequency channel x. If the device 22 of the radio network 2 to be newly formed is activated, it attempts to find a free frequency channel. This can take place such that the device 22 discovers the frequency channel x to be free at this point in time because no data is currently being transmitted in the existing network 1. However as soon as the device 22 attempts to seize the frequency channel x, this is detected by the device 16 in the first network, which consequently performs an additional seizure of the frequency channel x by transmitting a sequence of data. This is in turn identified by the device 22, which consequently switches to another frequency channel y. The facility 26, 26', which contains the functionality of monitoring the frequency channel x of the existing network 1 and the functionality of the additional seizure of the frequency channel x, may include all or individual devices in the existing network 1 or separate devices provided as extra herefor. For instance an attempted third-party seizure of the used frequency channel z by the active devices in each instance, e.g. 16, of the network 1, can be detected and notified to a separate device 27, which then performs the additional seizure of the frequency channel x. WE CLAIM 1. A radio network (1) comprising devices (11 to 16) transmitting data, which seize one of several available frequency channels (x, y) for the duration of the data transmission and comprising a monitoring facility (26, 26'), which additionally seizes the used frequency channel (x) during pauses between the individual data transmissions, characterized in that the monitoring facility (26, 26') is embodied to monitor the seized frequency channel (x) for an attempted seizure by means of a device (22) which does not belong to the radio network (1) and to perform the additional seizure of the frequency channel (x) as a function of the detection of such an attempt. 2. The radio network (1) as claimed in claim 1, characterized in that the monitoring facility (26, 26') is embodied to increase the transmission power during the additional seizure. 3. The radio network (1) as claimed in claim 1 or 2, characterized in that the monitoring facility (26, 26') is embodied to perform the monitoring of the frequency channel (x) of the existing network (1) during the pauses between individual data transmissions. 4. The radio network (1) as claimed in one of claims 1 to 3, characterized in that the functionality of the monitoring of the seized frequency channel (x) for an attempted seizure by a device (22) which does not belong to the radio network (1) and the functionality of the additional seizure of the frequency channel (x) are implemented in at least one of the devices (11 to 16) of the radio network (1). 5. The radio network (1) as claimed in one of claims 1 to 3, characterized in that the functionality of the monitoring of the seized frequency channel (x) for an attempted seizure by means of a device (22) which does not belong to the radio network (1) is implemented in at least one of the devices (11 to 16) of the radio network (1) and the functionality of the additional seizure of the frequency channel (x) is implemented in a device (27) which is separate from the radio network (1). 6. The radio network (1) as claimed in one of claims 1 to 3, characterized in that the functionality of the monitoring of the seized frequency channel (x) for an attempted seizure by means of a device (22) which does not belong to the radio network (1) is implemented in a device (27) which is separate from the radio network (1) and the functionality of the additional seizure of the frequency channel (x) is implemented in the at least one of the devices (11 to 16) in the radio network (1). 7. The radio network (1) as claimed in one of claims 1 to 3, characterized in that the functionality of the monitoring of the seized frequency channel (x) for an attempted seizure by means of a device (22) which does not belong to the radio network (1) and the functionality of the additional seizure of the frequency channel (x) are implemented in a device (27) which is separate from the radio network (1). 8. A method for transmitting data in a radio network (1), with devices (11 to 16) of the radio network (1) transmitting data seizing one of several available frequency channels (x, y) for the duration of the data transmission and the used frequency channel (x) also being seized during pauses between the individual data transmissions, characterized in that the seized frequency channel (x) is monitored for an attempted seizure by means of a device (22) which does not belong to the radio network (1) and the additional seizure of the frequency channel (x) takes place as a function of the detection of such an attempt. 9. The method as claimed in claim 8, characterized in that the transmission power is increased during the additional seizure. 10. The method as claimed in claim 8 or 9, characterized in that the monitoring of the frequency channel (x) of the existing network (1) takes place in pauses between individual data transmissions. In a radio network (1), in which devices (11 to 16) transmitting data seize one of a plurality of available frequency channels (x, y) for the duration of the data transmission, during breaks between the individual data transmissions the frequency channel (x) used is additionally seized in order to sign a1 the seizure of the frequency channel (x) to devices (22) of another radio network (2). In order to reduce the increased energy consumption associated with the additional seizure of the frequency channel (x), the seized frequency channel (x) is monitored for the attempt of seizure by a device (22) that is not part of the radio part (1) and the additional seizure of the frequency channel (x) is performed as a function of the detection of such an attempt.

Full Text

Description
Radio network and method for transmitting data in a radio
network
The invention relates to a radio network comprising devices
transmitting data, said devices seizing one of several
available frequency channels for the duration of the data
transmission and comprising a monitoring facility, which also
seizes the used frequency channel during pauses between the
individual data transmissions.
The invention further relates to a method for transmitting
data in a radio network, with devices in the radio network
which transmit data seizing one of several available frequency
channels for the duration of the data transmission and the
used frequency channel also being seized during pauses between
the individual data transmissions.
A radio network and/or a method of this type are known from DE
199 46 540 A1.
In many fields, like for instance in industry, science and
medicine, self-organizing radio networks and networks without
infrastructure, so-called ad-hoc networks, are used
increasingly. A known example of a network of this type is the
wireless local area network (WLAN) according to the IEEE
802.11 standard; Radio links can be established here at any
point between devices (stations), without being dependent upon
fixedly installed base stations or a defined radio network
design. Links from a station to a target station can be
realized in a plurality of possible ways either directly or by
means of relay stations. A limited frequency range with a

predetermined number of frequency channels is available for
the communication, of which only a small number can in turn be
used at the same time without any overlap.
To prevent frequency conflict in the case of adjacent or
spatially overlapping radio networks, it is known in the case
of a radio network to be newly formed that by intercepting the
available frequency channels it is determined which of them
are already seized in order on this basis to be able to select
a free frequency channel. Newly activated devices are however
not able to establish the seizure of a frequency band if no
data transmission takes place on this frequency at the time of
its activation.
With the radio network and/or method known from DE 199 46 540
A1 mentioned in the introduction, provision is made for this
reason to additionally seize the used frequency channel during
the pauses between individual data transmissions, for instance
by means of a burst signal, in order to signal the seizure of
the frequency channel to devices in another radio network. In
particular, if data is only transmitted sporadically and/or at
large time intervals, this known type of additional seizure of
the frequency channel is however associated with a relatively
high energy consumption.
To solve this problem, provision is made in accordance with
the invention for the monitoring facility to be embodied in
the case of the radio network of the type cited in the
introduction so as to monitor the seized frequency channel for
an attempted seizure by means of device which does not belong
to the radio network and to perform the additional seizure of
the frequency channel as a function of the detection of such
an attempt.

For the method of the type cited in the introduction, the
object is correspondingly achieved such that the seized
frequency channel is monitored for an attempted seizure by
means of a device which does not belong to the radio network
and the additional seizure of the frequency channel takes
place as a function of the detection of such an attempt.
The additional seizure of the frequency channel used for the
data transmission then only takes place if a device which does
not belong to the radio network attempts to seize this
frequency channel and this attempt is detected. The method
according to the invention is thus particularly advantageous
for such radio networks in which data is only transmitted
sporadically and/or at large time intervals.
The additional seizure of the frequency channel by means of
the existing network can take place for instance in that a
sequence of data is sent to an address which is not available
in the existing radio network or that data is transmitted in
the form of broadcasts and these are forwarded by all routers
(relay stations) in the radio network, so that an additional
seizure of the frequency channel is produced as a result.
Furthermore, the transmission power can be increased during
the increase in the seizure. The transmission power can then
also be increased in particular if the attempt to seize the
frequency channel is detected by a third-party device during a
data transmission between the devices in the radio network,
because the original transmission power was not sufficiently
high for instance in order to signalize the seizure of the
frequency channel to the third-party device.

The monitoring of the frequency channel of the existing
network can take place in a restricted fashion permanently or
temporally in respect of the pauses between individual data
transmissions if newly activated devices are not able to
determine the seizure of the frequency band. The monitoring of
the frequency channel of the existing network and/or the
increase in the seizure of the frequency channel can take
place by means of all or individual devices of the existing
network or by means of separate devices provided herefor.
To further explain the invention, reference is made below to
the figures in the drawing, in which;
Figure 1 shows a detailed exemplary embodiment of two locally
overlapping radio networks and
Figure 2 shows a detailed example of the course of the method
according to the invention
Figure 1 shows, in a highly diagrammatic manner, first radio
network 1 consisting of devices 11 to 16 which communicate
with one another in a frequency channel x and a second radio
network 2 to be newly formed with the devices 21 to 25.
As shown in Figure 2, the device 16 in the first radio network
1 communicates sporadically in the frequency channel x and
monitors during the pauses therebetween whether a device which
does not belong to network 1 is attempting to seize the
frequency channel x. If the device 22 of the radio network 2
to be newly formed is activated, it attempts to find a free
frequency channel. This can take place such that the device 22
discovers the frequency channel x to be free at this point in
time because no data is currently being transmitted in the

existing network 1. However as soon as the device 22 attempts
to seize the frequency channel x, this is detected by the
device 16 in the first network, which consequently performs an
additional seizure of the frequency channel x by transmitting
a sequence of data. This is in turn identified by the device
22, which consequently switches to another frequency channel
y.
The facility 26, 26', which contains the functionality of
monitoring the frequency channel x of the existing network 1
and the functionality of the additional seizure of the
frequency channel x, may include all or individual devices in
the existing network 1 or separate devices provided as extra
herefor. For instance an attempted third-party seizure of the
used frequency channel z by the active devices in each
instance, e.g. 16, of the network 1, can be detected and
notified to a separate device 27, which then performs the
additional seizure of the frequency channel x.

WE CLAIM
1. A radio network (1) comprising devices (11 to 16)
transmitting data, which seize one of several available
frequency channels (x, y) for the duration of the data
transmission and comprising a monitoring facility (26, 26'),
which additionally seizes the used frequency channel (x)
during pauses between the individual data transmissions,
characterized in that the monitoring facility (26, 26') is
embodied to monitor the seized frequency channel (x) for an
attempted seizure by means of a device (22) which does not
belong to the radio network (1) and to perform the additional
seizure of the frequency channel (x) as a function of the
detection of such an attempt.
2. The radio network (1) as claimed in claim 1,
characterized in that the monitoring facility (26, 26') is
embodied to increase the transmission power during the
additional seizure.
3. The radio network (1) as claimed in claim 1 or 2,
characterized in that the monitoring facility (26, 26') is
embodied to perform the monitoring of the frequency channel
(x) of the existing network (1) during the pauses between
individual data transmissions.
4. The radio network (1) as claimed in one of claims 1 to 3,
characterized in that the functionality of the monitoring of
the seized frequency channel (x) for an attempted seizure by a
device (22) which does not belong to the radio network (1) and
the functionality of the additional seizure of the frequency
channel (x) are implemented in at least one of the devices (11
to 16) of the radio network (1).

5. The radio network (1) as claimed in one of claims 1 to 3,
characterized in that the functionality of the monitoring of
the seized frequency channel (x) for an attempted seizure by
means of a device (22) which does not belong to the radio
network (1) is implemented in at least one of the devices (11
to 16) of the radio network (1) and the functionality of the
additional seizure of the frequency channel (x) is implemented
in a device (27) which is separate from the radio network (1).
6. The radio network (1) as claimed in one of claims 1 to 3,
characterized in that the functionality of the monitoring of
the seized frequency channel (x) for an attempted seizure by
means of a device (22) which does not belong to the radio
network (1) is implemented in a device (27) which is separate
from the radio network (1) and the functionality of the
additional seizure of the frequency channel (x) is implemented
in the at least one of the devices (11 to 16) in the radio
network (1).
7. The radio network (1) as claimed in one of claims 1 to 3,
characterized in that the functionality of the monitoring of
the seized frequency channel (x) for an attempted seizure by
means of a device (22) which does not belong to the radio
network (1) and the functionality of the additional seizure of
the frequency channel (x) are implemented in a device (27)
which is separate from the radio network (1).
8. A method for transmitting data in a radio network (1),
with devices (11 to 16) of the radio network (1) transmitting
data seizing one of several available frequency channels (x,
y) for the duration of the data transmission and the used
frequency channel (x) also being seized during pauses between

the individual data transmissions, characterized in that the
seized frequency channel (x) is monitored for an attempted
seizure by means of a device (22) which does not belong to the
radio network (1) and the additional seizure of the frequency
channel (x) takes place as a function of the detection of such
an attempt.
9. The method as claimed in claim 8, characterized in that
the transmission power is increased during the additional
seizure.
10. The method as claimed in claim 8 or 9, characterized in
that the monitoring of the frequency channel (x) of the
existing network (1) takes place in pauses between individual
data transmissions.

In a radio network (1), in which devices (11 to 16)
transmitting data seize one of a plurality of
available frequency channels (x, y) for the duration of the data
transmission, during breaks between the individual data transmissions
the frequency channel (x) used is additionally seized in order to sign
a1 the seizure of the frequency channel (x) to devices (22)
of another radio network (2). In order to reduce the increased energy
consumption associated with the additional seizure of the frequency
channel (x), the seized frequency channel (x) is monitored for the
attempt of seizure by a device (22) that is not part of the radio part
(1) and the additional seizure of the frequency channel (x)
is performed as a function of the detection of such an attempt.

Documents:

2807-KOLNP-2009-(28-07-2014)-ABSTRACT.pdf

2807-KOLNP-2009-(28-07-2014)-CLAIMS.pdf

2807-KOLNP-2009-(28-07-2014)-CORRESPONDENCE.pdf

2807-KOLNP-2009-(28-07-2014)-DESCRIPTION (COMPLETE).pdf

2807-KOLNP-2009-(28-07-2014)-DRAWINGS.pdf

2807-KOLNP-2009-(28-07-2014)-FORM-1.pdf

2807-KOLNP-2009-(28-07-2014)-FORM-2.pdf

2807-KOLNP-2009-(28-07-2014)-FORM-3.pdf

2807-KOLNP-2009-(28-07-2014)-FORM-5.pdf

2807-KOLNP-2009-(28-07-2014)-OTHERS.pdf

2807-KOLNP-2009-(28-07-2014)-PETITION UNDER RULE 137.pdf

2807-kolnp-2009-abstract.pdf

2807-kolnp-2009-claims.pdf

2807-KOLNP-2009-CORRESPONDENCE-1.1.pdf

2807-kolnp-2009-correspondence.pdf

2807-kolnp-2009-description (complete).pdf

2807-kolnp-2009-drawings.pdf

2807-kolnp-2009-form 1.pdf

2807-kolnp-2009-form 18.pdf

2807-kolnp-2009-form 2.pdf

2807-kolnp-2009-form 3.pdf

2807-kolnp-2009-form 5.pdf

2807-kolnp-2009-gpa.pdf

2807-kolnp-2009-international publication.pdf

2807-kolnp-2009-international search report.pdf

2807-kolnp-2009-pct priority document notification.pdf

2807-kolnp-2009-pct request form.pdf

2807-KOLNP-2009-SCHEDULE.pdf

2807-kolnp-2009-specification.pdf

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Patent Number

265618

Indian Patent Application Number

2807/KOLNP/2009

PG Journal Number

10/2015

Publication Date

06-Mar-2015

Grant Date

02-Mar-2015

Date of Filing

03-Aug-2009

Name of Patentee

SIEMENS AKTIENGESELLSCHAFT

Applicant Address

WITTELSBACHERPLATZ 2, 80333 MUNCHEN

Inventors:

#	Inventor's Name	Inventor's Address
1	JOSEF BRANDSTETTER	HOLOCHERG. 35/8, 1150 WIEN
2	CHRISTIAN ZIEGLER	WIETHESTRASSE 84/B/HAUS 23, 1220 WIEN

PCT International Classification Number

H04L12/28; H04L12/28

PCT International Application Number

PCT/EP2008/050255

PCT International Filing date

2008-01-10

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	102007006159.7	2007-02-07	Germany