WO2011072884A1 - Method of management for operating a broad band communication system and a narrow band communication system implemented in a same frequency band - Google Patents
Method of management for operating a broad band communication system and a narrow band communication system implemented in a same frequency band Download PDFInfo
- Publication number
- WO2011072884A1 WO2011072884A1 PCT/EP2010/054389 EP2010054389W WO2011072884A1 WO 2011072884 A1 WO2011072884 A1 WO 2011072884A1 EP 2010054389 W EP2010054389 W EP 2010054389W WO 2011072884 A1 WO2011072884 A1 WO 2011072884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication system
- frequency
- communication
- band
- frequency channels
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/71—Interference-related aspects the interference being narrowband interference
- H04B1/7101—Interference-related aspects the interference being narrowband interference with estimation filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
Definitions
- the purpose of the present invention is a method of management for operating a broad band communication system and a narrow band communication system, the narrow band communication system and the broadband communication system being implemented in a same frequency band.
- the two communication systems are implemented in a same frequency band if, for a given geographical zone, one of the two systems operates within a frequency band included in the frequency band used by the other system, or even if, still within a given geographical zone, the first system and the second system presents a frequency band, called a crossover frequency band of the 2 systems, used by both systems considered.
- the field of the invention is, generally speaking, that of communication systems or networks, notably cellular type communication systems.
- broadband communication systems are known (for example, WIMAX or UMTS LTE systems), which require having broad frequency bands, typically superior to a Mega-Hertz.
- the channel widths may be, for example, 5 MHz, 10 MHz, 20 MHz, 1 .25 MHz.
- narrow band communication systems are known, which use a series of communication channels of relatively low spectral width, typically just a few Kilo-Hertz.
- channel widths for example, 10 kHz, 12.5 kHz and 25 kHz, are used.
- a re-use factor is defined for reutilising the communication channels, which takes account of the fact that in two adjacent cells, notably, the same communication channel is not used for each of the considered cells in order to essentially reduce the risks of interference.
- a number of narrow band channels used in each cell are obtained within a considered 5 MHz frequency band equal to: (5MHz/N)/ B na rrow band, where B narrow band corresponds to the width of the narrow band channels considered.
- Figure 1 illustrates such a situation, with the narrow band channels 101 implemented within a 5 MHz frequency band 102 used by a broadband system. Even if all narrow band channels are not used, the coexistence within certain frequency ranges of broadband system signals and of narrow band system signals give rise to mutual interferences between these signals. The broadband system signals more or less interfere with each other, depending on the density of narrow band channels.
- the power of these narrow band signals may be high, for example, the power of each one may be of the same type or similar to that of the broadband signal.
- the emission levels of mobile terminals are in fact limited, whatever the band width, notably for reasons of autonomy.
- Such signal ratio on interference is very unfavourable and the broadband signal is most likely not to be able to be correctly processed under such conditions.
- These conditions, and even more difficult conditions may be commonly encountered, for example, in the case of using, on the same location and thus on the same coverage, a broadband system and a narrow band system, or even a broadband system and several narrow band systems.
- the invention essentially proposes an improvement of the signal ratio over interference for the broadband signal when in the presence of several narrow band communications within the same frequency band.
- the broadband network is proposed as satisfactorily working when in presence of interferences due to narrow band signals.
- the present invention symmetrically proposes a protection of the narrow band network (or networks) in presence of interferences due to broadband signals.
- a scan operation is notably proposed in the invention, via the broadband system, of the channels likely to be used by the narrow band system or systems present within the band, in order to determine an effective use or not of the said narrow band channels by the narrow band system.
- the invention thus essentially concerns a method of management for operating a first system of communication of the broadband type communication system emitting over a first frequency range, and at least a second system of communication of the narrow band type communication system emitting over a second frequency range, the first system and the second system or systems using all or part of a same frequency band, such common frequency band being called a crossover frequency band for both systems, characterised in that it comprises the following different steps consisting of:
- the method according to the invention may represent one or several additional characteristics from among those described hereafter.
- the method may comprise the step, prior to the scan operation, consisting of transmitting, from the second communication system towards the first communication system, data relating to the frequency channels used by the second communication system.
- the data relating to the frequency channels used by the second communication system may comprise initial datum relating to a central frequency of a first frequency channel used by the second communication system, and/or second datum relating to the width of the frequency channels used by the second communication system.
- the scan operation is embodied successively for each of the frequency channels defined by the initial datum and/or the second datum for the data relating to the frequency channels used by the second communication system.
- the identification step of the frequency channels used by the second communication system may comprise different operations consisting of: - measuring the power received within a communication channel considered as likely to be used by the second communication system;
- the identification step of the frequency channels used by the second communication system may comprise different operations consisting of:
- the step consisting of adapting the operating of the first communication system may comprise an operation consisting of minimising the signals received on the frequency channels identified as being used by the second communication system.
- the expression "minimise the signals received" indicates the fact that the largest part of the considered signals is not taken into account, or even that the portion of the energy taken within the considered signal received is reduced. Hence, the influence of these signals is minimised.
- this operation may be performed, notably on the portion of the signal carrying synchronisation data.
- this operation may be performed, notably on the portion of the signal carrying signalling data.
- this operation performed on the signal received from the first communication system consists of embodying a rejector or attenuator filtering on the signals received within the frequency channels identified as being used in the second communication system.
- said synchronisation operation may be embodied by comparing the received filtered signals with an expected synchronisation sequence filtered for the purpose of rejecting the narrow band channels corresponding to the frequency channels identified as being used in the second communication system.
- the step consisting of adapting the operating of the first communication system may comprise an operation consisting of reducing the power of the signals emitted by the first communication system within the frequency bands corresponding to the frequency channels identified as being used by the second communication system.
- this operation consists of filtering the broadband signal to be emitted by means of a rejector or attenuator filter within the frequency channels identified as being used in the second communication system, then to emit said filtered broadband signal.
- the present invention also refers to a telecommunications device able to implement the method, according to the invention, of management for operating a first system of communication of the broadband type communication system emitting over a first frequency range, and at least a second system of communication of the narrow band type communication system emitting over a second frequency range, the first system and the second system using all or part of a same frequency band, characterised in that said device comprises:
- the device according to the invention comprises either a first appliance and a second appliance which are a single apparatus, of the base station or mobile terminal type; alternatively, the device according to the invention comprises a first appliance and a second appliance which are separate, of the base station or mobile terminal type, the first appliance comprising means of transmission for transmitting datum relating to the frequency channels, identified as being used by the second communication system, to the second appliance.
- the broadband system occupies a 5 MHz frequency band.
- Figures 2 and 3 The context of Figures 2 and 3 is that of implementation within a same frequency band of a first system of communication of the broadband type communication system, operating within a first frequency band, and a second system of communication of the narrow band type communication system, operating within a second frequency band.
- Figure 2 illustrates, by means of a flow chart, a first implementation example of the method according to the invention.
- a scan operation of the first frequency range is performed by means of a scan device of the first communication system; a scan operation consists, by means of known sensors, of determining, for a given frequency range, the possible presence of signals within the considered frequency range.
- the interferences due to the narrow band channels vary according to the position of a terminal being covered by the broadband network. Indeed, the narrow band channels used in a cell of the narrow band system are not the same as those used in another cell, since many of the narrow band systems implemented are cellular type communication systems.
- the scan operation thus enables, for each cell of a considered communication network of the second communication system, to select the narrow band channels likely to be used.
- an initial operation 201 ' is performed consisting of supplying datum to the broadband system on the width and the position of the narrow band channels likely to be used in the second communication system.
- the information supplied may, for example, consist of the central frequency of the first narrow band channel by departing from the lowest frequency of the broadband channel, and/or of the band width of the channels used in the narrow band system.
- a second step 202 identification is performed by using the results of the scan operation, the frequency channels actually used by the second communication system;
- the broadband system deciphers the presence of a narrow band signal within a given frequency band by measuring the power received in said channel and by embodying a comparison 202' with the mean power received, possibly weighted by an adjustment factor, within the whole of the broadband divided by the Bbroadband Bnarrow band ratio, where Broadband is the width of the first frequency band, and where B na rro band is the width of the frequency channel likely to be used in the second communication system.
- the comparison 202' is embodied with a previously determined fixed power threshold;
- the step 202 enables to determine which narrow band channels are actually used, within a considered cell, for the transmission of signals by the second communication system within the first frequency band.
- an adaptation operation is performed for the operating of the first communication system within the frequency channels identified as being used by the second communication system.
- the adaptation operation consists of minimising the signals received within the channels identified in the previous step.
- the adaptation performed essentially aims to optimise certain operations of the first communication system, and essentially the operations bringing into action the components of the broadband signal that effectively occupy the whole of the band; among such operations are notably found synchronisation operations on the broadband signal received or operations for receiving signalling data.
- the synchronisation sequence and the signalling data are particularly important, the receptors of such communication systems having to be synchronised, no demodulation operation of the data received being possible if said receptors are not synchronised.
- data is transmitted across the whole of the 5 MHz band and for a limited period (a few OFDM symbols).
- Other data notably traffic information, may only be transmitted across a portion of the band or by excluding certain parts.
- a rejector or attenuator filtering is applied to the signal received within the corresponding narrow band channels. Synchronisation is then performed on this filtered signal received. This same filtered signal received may then be used to process, and notably to demodulate, for example, the signalling data transmitted when using the whole of the band of the broadband signal.
- the rejection of the detected narrow band channels present is performed by embodying the synchronisation on the broadband signal received (across the whole of the band) via correlation with an expected previously filtered synchronisation sequence for the purpose of rejecting or attenuating the corresponding narrow band channels.
- the correlation itself initiates rejection of the channels scrambled by the broadband signals.
- Figure 3 illustrates, by means of a flow chart, a second implementation example of the method according to the invention.
- a scan operation of the first frequency range is performed by means of a scan device of the first communication system; a scan operation consists, by means of known sensors, of determining, for a given frequency range, the possible presence of signals within the considered frequency range.
- an initial operation 301 ' is performed consisting of supplying datum to the broadband system on the width and the position of the narrow band channels likely to be used in the second communication system.
- the datum supplied may, for example, consist of the central frequency of the first narrow band channel by departing from the lowest frequency of the broadband channel, and/or of the band width of the channels used in the narrow band system.
- a second step 302 identical to the step 202 of the first example, identification is performed by using the results of the scan operation, the frequency channels actually used by the second communication system; there again, in a particular embodiment of the present invention, the broadband system deciphers the presence of a narrow band signal within a given frequency band by measuring the power received in said channel and by embodying a comparison 302' with the mean power received, possibly weighted by an adjustment factor, within the whole of the broadband divided by the Bbroadband/Bnarrow band ratio, where Broadband is the width of the first frequency band, and where B nar row band is the width of the frequency channel likely to be used in the second communication system.
- the comparison is embodied with a previously determined fixed power threshold;
- the step 302 enables to determine which narrow band channels are actually used, within a considered cell, for the transmission of signals by the second communication system within the first frequency band.
- an adaptation operation is performed for the operating of the first communication system within the frequency channels identified as being used by the second communication system.
- the adaptation performed aims to protect the signals of the narrow band system from the interferences created by the broadband signals. This is notably applied, though not exclusively, to the emission on the descending route (Base Station towards Mobile Station).
- the broadband system performs, prior to emission, a processing of the broadband signal to be emitted consisting of reducing the power emitted within its communication channels and, for example, its emission channels (descending route), corresponding to the narrow band channels identified as being used in the second communication system during the previous step in order to reduce the interferences created on the narrow band channels used in the zone considered.
- the scan of the narrow band channels is performed by measuring, for each narrow band channel, the power received on each antenna. Then, for each narrow band channel, the powers received on the different antenna are added on, and it is this overall power that is used for deciding whether the narrow band channel is occupied or not by the narrow band system. Rejection of the corresponding narrow band channels may then be performed by temporal and spatial filtering by combining the signals of the different antenna.
- the scan operations 201 and 301 draw benefit due to the fact that in most narrow band systems, the channels are of the dual type: in such systems, the channels are linked, one ascending and the other descending. In most cases, the frequency gap between these two channels (ascending and descending) is fixed (known as the "duplex gap").
- the operations of scan 201 and 301 may consist of:
- the different implementation examples of the method according to the invention just described are implemented by means of a communication device, said device being constituted either of a single apparatus, of the base station or mobile terminal type, implementing together all the operations described, i.e. a first appliance and a second appliance, one of the appliances being a base station and the other appliance a mobile terminal, each undergoing the different steps of the method according to the invention.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080057637.4A CN102656912B (en) | 2009-12-16 | 2010-03-31 | For operating in the management method of wide-band communication system and the narrow-band communication system realized in same frequency band and realizing the communication equipment of the method |
US13/515,439 US9203467B2 (en) | 2009-12-16 | 2010-03-31 | Method of management for operating a broad band communication system and a narrow band communication system implemented in a same frequency band |
ES10715149T ES2834030T3 (en) | 2009-12-16 | 2010-03-31 | Management method to operate a broadband communication system and a narrowband communication system implemented in the same frequency band, and corresponding device |
EP10715149.0A EP2514226B8 (en) | 2009-12-16 | 2010-03-31 | Method of management for operating a broad band communication system and a narrow band communication system implemented in a same frequency band, and corresponding device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0959064 | 2009-12-16 | ||
FR0959064A FR2954658B1 (en) | 2009-12-16 | 2009-12-16 | METHOD FOR MANAGING THE OPERATION OF A BROADBAND COMMUNICATION SYSTEM AND A NARROW BAND COMMUNICATION SYSTEM DEPLOYED IN A SAME FREQUENCY BAND |
Publications (1)
Publication Number | Publication Date |
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WO2011072884A1 true WO2011072884A1 (en) | 2011-06-23 |
Family
ID=42313733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/054389 WO2011072884A1 (en) | 2009-12-16 | 2010-03-31 | Method of management for operating a broad band communication system and a narrow band communication system implemented in a same frequency band |
Country Status (7)
Country | Link |
---|---|
US (1) | US9203467B2 (en) |
EP (1) | EP2514226B8 (en) |
KR (1) | KR101650983B1 (en) |
CN (1) | CN102656912B (en) |
ES (1) | ES2834030T3 (en) |
FR (1) | FR2954658B1 (en) |
WO (1) | WO2011072884A1 (en) |
Cited By (7)
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WO2013020673A1 (en) * | 2011-08-09 | 2013-02-14 | Cassidian Sas | Method for enabling radioelectric coexistence between two pmr devices of which one is a narrowband type and the other is a broadband type |
WO2013109462A1 (en) * | 2012-01-17 | 2013-07-25 | Motorola Solutions, Inc. | Collaborative interference mitigation between physically-proximate narrowband and broadband communication devices |
CN103249049A (en) * | 2012-02-03 | 2013-08-14 | 电信科学技术研究院 | Method and equipment for resource distribution |
WO2014099297A1 (en) * | 2012-12-21 | 2014-06-26 | Motorola Solutions, Inc. | Method and apparatus for mitigating transmission interference between narrowband and broadband mobile devices |
US8995918B2 (en) | 2011-11-14 | 2015-03-31 | Motorola Solutions, Inc. | Mitigating transmission interference between digital radio and broadband communication devices |
US9066363B2 (en) | 2011-12-29 | 2015-06-23 | Motorola Solutions, Inc. | Methods and apparatus for mitigating interference between co-located collaborating radios |
CN106507367A (en) * | 2015-09-06 | 2017-03-15 | 中兴通讯股份有限公司 | A kind of transmission method of arrowband orthogonal frequency-division multiplex singal and device |
Families Citing this family (5)
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US8954025B2 (en) * | 2011-05-09 | 2015-02-10 | Bae Systems Information And Electronic Systems Integration Inc. | Tactical radio transceiver with intermediate frequency (IF) filter package for narrowband and wideband signal waveforms |
GB2498571A (en) | 2012-01-20 | 2013-07-24 | Intellectual Ventures Holding 81 Llc | Base station able to communicate with a second device type on a narrow subset frequency band contained within a first main band |
WO2018049683A1 (en) * | 2016-09-19 | 2018-03-22 | 海能达通信股份有限公司 | Frequency point switching method and apparatus, and wireless base station |
CN108183781B (en) * | 2017-11-28 | 2020-10-09 | 北京大学 | Method for sharing spectrum between NB-IoT system and other broadband communication systems |
CN114258068B (en) * | 2021-12-24 | 2023-11-14 | 浙江大学 | Self-adaptive inter-satellite communication system based on channel interception |
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- 2010-03-31 ES ES10715149T patent/ES2834030T3/en active Active
- 2010-03-31 KR KR1020127018099A patent/KR101650983B1/en active IP Right Grant
- 2010-03-31 CN CN201080057637.4A patent/CN102656912B/en not_active Expired - Fee Related
- 2010-03-31 WO PCT/EP2010/054389 patent/WO2011072884A1/en active Application Filing
- 2010-03-31 US US13/515,439 patent/US9203467B2/en active Active
- 2010-03-31 EP EP10715149.0A patent/EP2514226B8/en active Active
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Cited By (21)
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FR2979045A1 (en) * | 2011-08-09 | 2013-02-15 | Cassidian | METHOD OF RADIOELECTRIC COEXISTENCE BETWEEN TWO PMR DEVICES, ONE OF WHICH IS IN NARROW BAND AND THE OTHER WITH BROADBAND |
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US9066363B2 (en) | 2011-12-29 | 2015-06-23 | Motorola Solutions, Inc. | Methods and apparatus for mitigating interference between co-located collaborating radios |
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US10264587B2 (en) | 2012-01-17 | 2019-04-16 | Motorola Solutions, Inc. | Collaborative interference mitigation between physically-proximate narrowband and broadband communication devices |
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WO2014099297A1 (en) * | 2012-12-21 | 2014-06-26 | Motorola Solutions, Inc. | Method and apparatus for mitigating transmission interference between narrowband and broadband mobile devices |
CN106507367A (en) * | 2015-09-06 | 2017-03-15 | 中兴通讯股份有限公司 | A kind of transmission method of arrowband orthogonal frequency-division multiplex singal and device |
KR20180050711A (en) * | 2015-09-06 | 2018-05-15 | 지티이 코포레이션 | Method and device for transmitting a narrowband orthogonal frequency division multiplexing signal |
CN106507367B (en) * | 2015-09-06 | 2019-04-16 | 中兴通讯股份有限公司 | A kind of transmission method and device of narrowband orthogonal frequency-division multiplex singal |
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KR102011610B1 (en) | 2015-09-06 | 2019-10-21 | 지티이 코포레이션 | Method and device for transmitting narrowband orthogonal frequency division multiplexing signals |
US10601560B2 (en) | 2015-09-06 | 2020-03-24 | Zte Corporation | Methods and devices for transmitting narrow band orthogonal frequency division multiplexing signals |
Also Published As
Publication number | Publication date |
---|---|
CN102656912B (en) | 2016-03-09 |
EP2514226B1 (en) | 2020-10-14 |
KR20120094121A (en) | 2012-08-23 |
KR101650983B1 (en) | 2016-08-24 |
ES2834030T3 (en) | 2021-06-16 |
US9203467B2 (en) | 2015-12-01 |
EP2514226A1 (en) | 2012-10-24 |
CN102656912A (en) | 2012-09-05 |
FR2954658A1 (en) | 2011-06-24 |
EP2514226B8 (en) | 2020-12-16 |
US20120250564A1 (en) | 2012-10-04 |
FR2954658B1 (en) | 2012-09-28 |
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