CN102412886A - General aviation communication system and method - Google Patents
General aviation communication system and method Download PDFInfo
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- CN102412886A CN102412886A CN2011102805849A CN201110280584A CN102412886A CN 102412886 A CN102412886 A CN 102412886A CN 2011102805849 A CN2011102805849 A CN 2011102805849A CN 201110280584 A CN201110280584 A CN 201110280584A CN 102412886 A CN102412886 A CN 102412886A
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Abstract
The invention discloses a general aviation communication system and method. The general aviation communication system comprises a ground mobile communication network, an airborne terminal and a general aviation mobile information service center, wherein the ground mobile communication network comprises a base station, a mobile switching center and a mobile communication backbone network; the base station is provided with a horizontal antenna and a vertical antenna; the airborne terminal is arranged on a general aviation aircraft and is used to access into the ground mobile communication network by the base station; and the general aviation mobile information service center is connected with the ground mobile communication network and is communicated with the airborne terminal by the base station so as to provide service for the general aviation aircraft. According to the general aviation communication system and method disclosed by the embodiment of the invention, the traditional ground mobile communication frequency band can be directly used without occupying other frequency spectrum resources, the general aviation communication system can be compatible with various traditional mobile communication networks, and various services are provided.
Description
Technical field
The present invention relates to the General Aviation communication technical field, particularly a kind of General Aviation communication system and method.
Background technology
General Aviation (GA; General Aviation) is except that military affairs, police service, customs's anti-smuggling flight and the aerospace activity the public air transport flight, comprises the flying activity of aspects such as the operation flight of being engaged in industry, agricultural, forestry, fishery and building industry and health care, rescue and relief work, meteorological detection, marine monitoring, scientific experiment, education and training, culture and sports.The General Aviation spatial domain, low latitude below 3000m basically carries out.
At present, the data chainning that can be used for General Aviation communication comprises high frequency (HF, High Frequency) radio station, very high frequency(VHF) (VHF, Very High Frequency) radio station and satellite relay communication link.Simultaneously, the aloft service of civil air route such as ATC, ATM and AOC etc. also are applied in the General Aviation.Yet these data chainnings really are not applicable to General Aviation with service.
At first, VHF belongs to sighting distance (LOS, Line Of Sight) and propagates, and VHF base station coverage area radius surpasses 100km usually, and there is coverage hole in the 3000m following low latitude spatial domain movable for General Aviation.Secondly, because general aviation aircraft only in low-latitude flying, need not installed expensive advanced avionic device as aircarrier aircraft, traditional VHF and satellite link there is not very high economic benefit.In addition, general aviation aircraft quantity, scale will enlarge rapidly the coming years, and the traditional data chain is difficult to satisfy communication requirement.Simultaneously,, will cause the Civil Aviation System message capacity to reduce, the communication quality of airline operation task is caused certain influence with safe because General Aviation and civil aviaton utilize same data chainning.
" GoGo " system of the AirCell company research and development of the U.S. adopts the communication mode of high-altitude ATG (Air To Ground) EV-DO data network; Through 92 land macrocellulars that are distributed in the various places, North America is that aircraft provides communication service, and VHF that use cost is more traditional and satellite communication etc. are more cheap.The same LiveTV system that also has the research and development of U.S. JetBlue company that adopts this technology.But these two kinds of communication systems all are to civil air route flight design, use for General Aviation to have limitation equally.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency.For this reason; The present invention need provide a kind of General Aviation communication system and method based on the land mobile communication network; The advantage of this General Aviation communication system and method is: alleviate the contradiction between General Aviation scale communication requirement and the Radio Spectrum Resource anxiety, the multiple existing mobile communications network of compatibility and multiple service is provided.
According to an aspect of the present invention; A kind of General Aviation communication system is provided; It is characterized in that; Comprise: the land mobile communication network, said land mobile communication network comprises: base station, mobile switching centre and mobile communication backbone network are equipped with horizontal antenna and vertical antenna on the wherein said base station; Airborne Terminal, said Airborne Terminal is arranged on the general aviation aircraft, is used for inserting said land mobile communication network through said base station; And the General Aviation Mobile Information Service Center, said General Aviation Mobile Information Service Center links to each other with said land mobile communication network, and communicates by letter with said Airborne Terminal through said base station, to said general aviation aircraft service to be provided.
According to the General Aviation communication system of the embodiment of the invention, can directly utilize existing land mobile communication frequency band, need not take other frequency spectrum resource, can compatible multiple existing mobile communications network and multiple service is provided.
According to one embodiment of present invention, said horizontal antenna is α with respect to the inclination angle of vertical direction, and said horizontal antenna has beam angle θ
h, α>=0 ° wherein; And said vertical antenna with respect to the inclination angle of vertical direction be 90 ° and said vertical antenna actinal surface upwards, said vertical antenna has beam angle θ
v, θ wherein
h+ θ
v-2 α>=180 °.
According to the General Aviation communication system of the embodiment of the invention, said horizontal antenna and said vertical antenna be arranged so that said General Aviation communication system non-blind area.
According to one embodiment of present invention, said horizontal antenna and said vertical antenna are at beam angle θ
hWith beam angle θ
vIn gain greater than maximum gain-3dB.
According to the General Aviation communication system of the embodiment of the invention, said antenna gain choose the needs that can satisfy communication quality, can realize lower power consumption again.
According to one embodiment of present invention, said Airborne Terminal comprises: land mobile communication radio receiving unit, said land mobile communication radio receiving unit are used for receiving wireless signal from said base station; General Aviation private communication extraction unit, said General Aviation private communication extraction unit are used for extracting the General Aviation exclusive data from said wireless signal; And General Aviation communication service processing unit, said General Aviation communication service processing unit is used for said General Aviation exclusive data is handled.
According to the General Aviation communication system of the embodiment of the invention, the configuration of said Airborne Terminal makes said general aviation aircraft can realize and the communicating by letter of land mobile communication network.
According to one embodiment of present invention, said service comprise that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
According to the General Aviation communication system of the embodiment of the invention, can multiple service be provided to said general aviation aircraft.
According to one embodiment of present invention, said land mobile communication network is GSM, IS95, WCDMA, CDMA2000, TD-SCDMA and/or LTE network.
According to one embodiment of present invention; The protocol stack that said General Aviation communication means uses comprises physical layer by being low to moderate height; Data link layer, network layer, transport layer and application layer; Wherein said physical layer and said data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.
According to one embodiment of present invention; The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that said general aviation aircraft provides positioning function; The network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer supports that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
According to one embodiment of present invention, when said land mobile communication network was the LTE network, ground based mobile subscriber and said general aviation aircraft were given with the frequency spectrum resource cross-assignment in said base station.According to the said General Aviation communication system of the embodiment of the invention, can eliminate the influence of Doppler's expansion.
According to one embodiment of present invention; The sub-district at the current place of said general aviation aircraft is divided into 6 zones; Said General Aviation communication system is used between fast cell and is switched; Wherein when said general aviation aircraft got in said 6 zones, respective cell was said general aviation aircraft channel reservation in adjacent 6 sub-districts of base station requests under the current area; The base station of said respective cell is that said general aviation aircraft distributes a channel reservation, sends to said general aviation aircraft simultaneously and prepares the signaling in district more; Said general aviation aircraft receives said signaling, when the district takes place more, switches to said channel reservation at once; District's report is more sent to the base station of said sub-district in the base station of said respective cell; And district's affirmation is got in the base station of said sub-district.
According to the General Aviation communication system of the embodiment of the invention, when said general aviation aircraft high-speed flight, also can realize switching between fast cell, thereby guarantee said General Aviation communication quality of communication systems.
According to a further aspect in the invention, a kind of General Aviation communication means is provided, has comprised: the Airborne Terminal on general aviation aircraft mobile communications network earthward sends first signal; Base station usage level antenna and vertical antenna in the said land mobile communication network are transferred to the General Aviation Mobile Information Service Center with said first signal through mobile switching centre in the said land mobile communication network and mobile communication backbone network; Said aviation Mobile Information Service Center sends secondary signal to said land mobile communication network; Mobile communication backbone network and mobile switching centre in the said land mobile communication network are transferred to said base station with said secondary signal; And said base station uses said vertical antenna and said horizontal antenna that said secondary signal is transferred to said Airborne Terminal to said general aviation aircraft service to be provided.
According to the General Aviation communication means of the embodiment of the invention, can directly utilize existing land mobile communication frequency band, need not take other frequency spectrum resource, can compatible multiple existing mobile communications network and multiple service is provided.
According to one embodiment of present invention, said horizontal antenna is α with respect to the inclination angle of vertical direction, and said horizontal antenna has beam angle θ
h, α>=0 ° wherein; And said vertical antenna with respect to the inclination angle of vertical direction be 90 ° and said vertical antenna actinal surface upwards, said vertical antenna has beam angle θ
v, θ wherein
h+ θ
v-2 α>=180 °.
According to the General Aviation communication means of the embodiment of the invention, said horizontal antenna and said vertical antenna be arranged so that said General Aviation communication system non-blind area.
According to one embodiment of present invention, said horizontal antenna and said vertical antenna are at beam angle θ
hWith beam angle θ
vIn gain respectively greater than maximum gain-3dB.
According to the General Aviation communication system of the embodiment of the invention, said antenna gain choose the needs that can satisfy communication quality, can realize lower power consumption again.
According to one embodiment of present invention, said service comprise that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
According to the General Aviation communication system of the embodiment of the invention, can multiple service be provided to said general aviation aircraft.
According to one embodiment of present invention, said land mobile communication network is GSM, IS95, WCDMA, CDMA2000, TD-SCDMA and/or LTE network.
According to one embodiment of present invention; The protocol stack that said General Aviation communication means uses comprises physical layer by being low to moderate height; Data link layer, network layer, transport layer and application layer; Wherein said physical layer and said data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.
According to one embodiment of present invention; The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that said general aviation aircraft provides positioning function; The network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer supports that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
According to one embodiment of present invention, when said land mobile communication network was the LTE network, ground based mobile subscriber and said general aviation aircraft were given with the frequency spectrum resource cross-assignment in said base station.According to the said General Aviation communication system of the embodiment of the invention, can eliminate the influence of Doppler's expansion.
According to one embodiment of present invention; The sub-district at the current place of said general aviation aircraft is divided into 6 zones; The minizone switching of said General Aviation communication system comprises step: when said general aviation aircraft got in said 6 zones, respective cell was said general aviation aircraft channel reservation in adjacent 6 sub-districts of base station requests under the current area; The base station of said respective cell is that said general aviation aircraft distributes a channel reservation, sends to said general aviation aircraft simultaneously and prepares the signaling in district more; Said general aviation aircraft receives said signaling, when the district takes place more, switches to said channel reservation at once; District's report is more sent to the base station of said sub-district in the base station of said respective cell; And district's affirmation is got in the base station of said sub-district.
According to the General Aviation communication system of the embodiment of the invention, when said general aviation aircraft high-speed flight, also can realize switching between fast cell, thereby guarantee said General Aviation communication quality of communication systems.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structured flowchart of General Aviation communication system according to an embodiment of the invention;
Fig. 2 is the structured flowchart of Airborne Terminal according to an embodiment of the invention;
Fig. 3 is the structural representation of horizontal antenna and vertical antenna according to an embodiment of the invention;
Fig. 4 is the covering sketch map of horizontal antenna and vertical antenna according to an embodiment of the invention;
Fig. 5 is the sketch map of the protocol stack that uses of General Aviation communication system according to an embodiment of the invention;
Fig. 6 is the structural representation of sub-district when carrying out handover according to an embodiment of the invention;
Fig. 7 is the flow chart of General Aviation communication means according to an embodiment of the invention;
Fig. 8 is a handover flow chart according to an embodiment of the invention;
Fig. 9 is the emulation sketch map of the relation of ICI power and Doppler's expansion when adopting discontinuous spectrum allocation may according to an embodiment of the invention;
Figure 10 is the emulation sketch map of relation of the error rate and the signal to noise ratio of General Aviation communication system according to an embodiment of the invention; And
Figure 11 is the comparison sketch map of channeling and existing channeling according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Need to prove that in addition, term " first ", " second ", " the 3rd " only are used to describe purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more a plurality of these characteristics can be shown or impliedly comprised to the characteristic that is limited with " first ", " second ", " the 3rd " clearly.Further, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
Specific embodiment of the present invention is described with reference to the drawings below.
Fig. 1 is the structured flowchart of General Aviation communication system according to an embodiment of the invention.As shown in Figure 1, General Aviation communication system 10 comprises: land mobile communication network 11, Airborne Terminal 12 and General Aviation Mobile Information Service Center 13.
Particularly, land mobile communication network 11 comprises: base station 111, mobile switching centre (MSC) 112 and mobile communication backbone network 113 wherein are equipped with horizontal antenna 1111 and vertical antenna 1112 on the base station 111.Airborne Terminal 12 is arranged on the general aviation aircraft, is used for inserting land mobile communication network 11 through base station 111.General Aviation Mobile Information Service Center 13 links to each other with land mobile communication network 11, and through communicating by letter with Airborne Terminal 12 base station 111, to general aviation aircraft service to be provided.
Fig. 2 is the structured flowchart of Airborne Terminal 12 according to an embodiment of the invention.As shown in Figure 2, Airborne Terminal 12 comprises: land mobile communication radio receiving unit 121, General Aviation private communication extraction unit 122 and General Aviation communication service processing unit 123.
Particularly, land mobile communication radio receiving unit 121 is used for the 111 reception wireless signals from the base station.General Aviation private communication extraction unit 122 is used for extracting the General Aviation exclusive data from wireless signal.General Aviation communication service processing unit 123 is used for the General Aviation exclusive data is handled
Fig. 3 is the structural representation of horizontal antenna and vertical antenna according to an embodiment of the invention.As shown in Figure 3, horizontal antenna 1111 is α with respect to the inclination angle of vertical direction, and horizontal antenna 1111 has beam angle θ
h, α>=0 ° wherein.Vertical antenna 1112 with respect to the inclination angle of vertical direction be 90 ° and vertical antenna 1112 actinal surfaces upwards, vertical antenna 1112 has beam angle θ
v Horizontal antenna 1111 and vertical antenna 1112 are at beam angle θ
hWith beam angle θ
vIn gain respectively greater than maximum gain-3dB, promptly maximum gain is half the.Horizontal antenna 1111 is similar with the antenna of conventional floor mobile base station, towards level almost, very little downward inclination angle is arranged usually, and the 3dB beam angle range is less, is mainly ground based mobile subscriber common mobile communication service is provided; The access service of communication also can be provided, for general aviation aircraft particularly near airport and airport.The actinal surface of vertical antenna 1112 upwards has very big 3dB beam angle usually, and the mobile subscriber provides communication service for General Aviation.
Fig. 4 is the covering sketch map of horizontal antenna and vertical antenna according to an embodiment of the invention.As shown in Figure 4; The honeycomb that base station 111 forms is different from traditional terrestrial cellular, and vertical antenna 1112 covers the spatial domain, low latitude in the 3dB beam angle range of top, and adjacent two honeycombs produce in the space and overlap; Like the above zone of A point and B point among the figure, and A point and the following spatial domain of B point are its coverage hole.Horizontal antenna 1111 produces traditional terrestrial cellular, and its 3dB beam angle upper limit segment need remedy the lower space of silence below A point and the B point simultaneously, therefore needs equally to consider cover height, thereby constitutes three-dimensional honeycomb.For making General Aviation communication system 10 non-blind areas, three angles shown in Fig. 3 should satisfy θ
h+ θ
v-2 α>=180 °
Fig. 5 is the sketch map of the protocol stack that uses of General Aviation communication system according to an embodiment of the invention.As shown in Figure 5; The protocol stack that the General Aviation communication system is used comprises physical layer by being low to moderate height; Data link layer, network layer, transport layer and application layer; Wherein physical layer and data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that general aviation aircraft provides positioning function; The network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer is supported air traffic control professional (ATC), air traffic control professional (ATM), aviation operation management service (AOC) and aviation passenger communication service (APC).
In one embodiment of the invention, for different land mobile communication networks, different physical layer and the link layer protocols of General Aviation communication system 10 designs.The land mobile communication network can be GSM, IS95, WCDMA, CDMA2000, TD-SCDMA and/or LTE network.Typical 2G network G SM frequency spectrum adopts the mode of FDMA on 900/1800MHz, every is a number of sub-carrier at a distance from 200kHz, and each subcarrier is divided into 8 time slots with the mode of TDMA again, and its transmission rate is 270Kb/s.Typical 3G network such as WCDMA, CDMA2000 and TD-SCDMA adopt spread spectrum communication, and transmission rate is at 384Kb/s～2Mb/s, and the cdma network frequency spectrum of China is up 825MHz～835MHz, descending 870MHz-880MHz.The LTE network transmission speed is more than 100Mb/s, and frequency spectrum can be expanded upgrading from 1.4MHz to 20MHz.
The flying speed of general aviation aircraft is usually at 200km/h～400km/h, and Doppler's expansion is compared not too serious with civil air route flight.And GSM and cdma network can be resisted the Doppler's expansion in the certain limit, like the maximum support speed of GSM-R 500km/h, can directly utilize its carrier allocation scheme.Yet LTE is based on the OFDM modulation system, even very little Doppler expansion also can produce and disturb that (ICI Inter-Carrier-Interference), therefore adopts the method for discontinuous spectrum allocation may between carrying.Particularly; Give ground based mobile subscriber and general aviation aircraft with the cross-assignment of ofdm system entire spectrum resource; From on allocation of carriers, carrier spacing (SI, Sub-carrier Interval) of General Aviation mobile subscriber being increased, reduce the ICI that causes by Doppler's expansion.When distributing a number of sub-carrier to give the General Aviation mobile subscriber, one or several adjacent subcarrier will no longer be distributed to other General Aviations mobile subscriber, and corresponding the increasing of SI is twice or several times.And,, under original SI, get final product proper communication owing to there is not Doppler to expand influence for ground based mobile subscriber, can continuous dispensing.
Because the general aviation aircraft flying height is below 3km, channel can be used typical R ician and the simulation of Rayleigh fading channel, and unification is represented with the Nakagami-m channel model.Its probability density function (PDF, Probability Density Function) is expressed as
Wherein, r is a signal envelope,
Be gamma function,
Be form factor, Ω=E (r
2).
When m=1, Nakagami-m deteriorates to Rayleigh and distributes; M＞1 o'clock, Nakagami-m can use the relation
between the K factor that form factor and Rician distribute to confirm approximate.
Fig. 6 is the structural representation of sub-district when carrying out handover according to an embodiment of the invention.General aviation aircraft is because flying speed is high, and generation district more is more frequent than ground based mobile subscriber, needs to switch between better fast cell.As shown in Figure 6, the sub-district O at the current place of general aviation aircraft is divided into 6 regional a～f, and when general aviation aircraft got into a certain zone, sub-district O asked that respective cell is its channel reservation among adjacent 6 sub-district A～F.The concrete switching when general aviation aircraft gets among 6 regional a～f, respective cell is the general aviation aircraft channel reservation among adjacent 6 the sub-district A～F of base station requests under the current area O; The base station of respective cell is that general aviation aircraft distributes a channel reservation, sends to general aviation aircraft simultaneously and prepares the signaling in district more; General aviation aircraft receives signaling, when the district takes place more, switches to channel reservation at once; District's report is more sent to the base station of sub-district O in the base station of respective cell; And district's affirmation is got in the base station of sub-district O.According to this quick switching, when the general aviation aircraft high-speed flight, also can realize switching between fast cell, thus the communication quality of assurance General Aviation communication system 10.
Fig. 7 is the flow chart of General Aviation communication means according to an embodiment of the invention.As shown in Figure 7, this General Aviation communication means may further comprise the steps.
Step S701, the Airborne Terminal 12 on the general aviation aircraft mobile communications network 11 earthward send first signal.
Step S702, the base station 111 usage level antennas 1111 in the land mobile communication network 11 are transferred to General Aviation Mobile Information Service Center 13 through the mobile switching centre in the land mobile communication network 11 112 with mobile communication backbone network 113 with first signal with vertical antenna 1112.
Step S703, aviation Mobile Information Service Center 13 mobile communications network 11 earthward send secondary signal.
Step S704, the mobile communication backbone network 113 in the land mobile communication network 11 is transferred to base station 111 with mobile switching centre 112 with secondary signal.
Step S705, base station 111 uses vertical antenna 1111 and horizontal antenna 1112 that secondary signal is transferred to Airborne Terminal 12 to general aviation aircraft service to be provided.
In one embodiment of the invention, horizontal antenna 1111 is α with respect to the inclination angle of vertical direction, and horizontal antenna 1111 has beam angle θ
h, α>=0 ° wherein; And vertical antenna 1112 with respect to the inclination angle of vertical direction be 90 ° and vertical antenna 1112 actinal surfaces upwards, vertical antenna 1112 has beam angle θ
v, θ wherein
h+ θ
v-2 α>=180 °.Horizontal antenna 1111 and vertical antenna 1112 are at beam angle θ
hWith beam angle θ
vIn gain respectively greater than maximum gain-3dB.
The protocol stack that General Aviation communication system 10 is used comprises physical layer by being low to moderate height; Data link layer; Network layer; Transport layer and application layer, wherein physical layer and data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that general aviation aircraft provides positioning function; The network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer is supported air traffic control professional (ATC), air traffic control professional (ATM), aviation operation management service (AOC) and aviation passenger communication service (APC).
Fig. 8 is a handover flow chart according to an embodiment of the invention.The sub-district O at the current place of general aviation aircraft is divided into 6 regional a～f, and when general aviation aircraft got into a certain zone, sub-district O asked that respective cell is its channel reservation among adjacent 6 sub-district A～F.As shown in Figure 8, concrete handover comprises following steps.
Step S801, when general aviation aircraft got among 6 regional a～f, respective cell was the general aviation aircraft channel reservation among adjacent 6 the sub-district A～F of base station requests under the current area O.
Step S802, the base station of respective cell is that general aviation aircraft distributes a channel reservation, sends to general aviation aircraft simultaneously and prepares the signaling in district more.
Step S803, general aviation aircraft receives signaling, when the district takes place more, switches to channel reservation at once;
Step S804, district's report is more sent to the base station of sub-district O in the base station of respective cell.
Step S805, the base station of sub-district O is got over the district and is confirmed.
According to this quick switching, when the general aviation aircraft high-speed flight, also can realize switching between fast cell, thus the communication quality of assurance General Aviation communication system 10.
According to embodiments of the invention; Through on the base station of existing land mobile communication network, installing vertical antenna additional; Rely on existing land mobile communication network struction General Aviation communication system, can directly utilize the mobile band of land mobile communication network, need not take other frequency spectrum resource; Can alleviate the contradiction between General Aviation scale communication requirement and the Radio Spectrum Resource anxiety, can compatible multiple existing mobile communications network and multiple service can be provided.
Fig. 9 is the emulation sketch map of the relation of ICI power and Doppler's expansion when adopting discontinuous spectrum allocation may according to an embodiment of the invention.When the ground mobile network adopts the OFDM modulation, adopt discontinuous spectrum allocation may, when SI was respectively 0～3, the relation of ICI power and Doppler's expansion was as shown in Figure 9.As can be seen from the figure, along with SI increases, ICI power is the order of magnitude and successively decreases; When SI=3; Three subcarriers of distributing to ground based mobile subscriber are promptly arranged between the subcarrier of distributing to per two General Aviation mobile subscribers, and ICI power is reduced to 0 one thousandth at interval the time, and big Doppler expands and is approximately equal to 0 ICI power when not having Doppler at interval the time and expanding down; Can think that this moment, Doppler's expansion did not have influence to the General Aviation mobile communication, security of system obtains checking.
Figure 10 is the emulation sketch map of relation of the error rate and the signal to noise ratio of General Aviation communication system according to an embodiment of the invention.The General Aviation communication system adopts the QPSK modulation, and under the different m factors, the error rate and signal to noise ratio relation are shown in figure 10.Along with the increase of the m factor, it is more and more faster that the error rate increases the trend successively decrease with signal to noise ratio, when m 10 when above, signal to noise ratio reaches 15dB and can the error rate be dropped to below the 10-6, the validity of system obtains verifying.
Figure 11 is the comparison sketch map of channeling and existing channeling according to an embodiment of the invention.According to one embodiment of the invention (11a), entire spectrum is divided into three sections b～d, adjacent three cell edges utilize different frequency range, and the center of housing estate position utilizes remaining two frequency ranges in this sub-district.According to existing channeling (11b), neighbor cell uses different frequency ranges.Compare with existing channeling, the centre availability of frequency spectrum is doubled, and the fail safe of system and validity obtain checking.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.
Claims (19)
1. a General Aviation communication system is characterized in that, comprising:
The land mobile communication network, said land mobile communication network comprises: base station, mobile switching centre and mobile communication backbone network are equipped with horizontal antenna and vertical antenna on the wherein said base station;
Airborne Terminal, said Airborne Terminal is arranged on the general aviation aircraft, is used for inserting said land mobile communication network through said base station; And
The General Aviation Mobile Information Service Center, said General Aviation Mobile Information Service Center links to each other with said land mobile communication network, and communicates by letter with said Airborne Terminal through said base station, to said general aviation aircraft service to be provided.
2. General Aviation communication system according to claim 1 is characterized in that,
Said horizontal antenna is α with respect to the inclination angle of vertical direction, and said horizontal antenna has beam angle θ
h, α>=0 ° wherein; And
Said vertical antenna with respect to the inclination angle of vertical direction be 90 ° and said vertical antenna actinal surface upwards, said vertical antenna has beam angle θ
v, wherein
θ
h+θ
v-2α≥180°。
3. General Aviation communication system according to claim 2 is characterized in that,
Said horizontal antenna and said vertical antenna are at beam angle θ
hWith beam angle θ
vIn gain respectively greater than maximum gain-3dB.
4. General Aviation communication system according to claim 1 is characterized in that, said Airborne Terminal comprises:
Land mobile communication radio receiving unit, said land mobile communication radio receiving unit are used for receiving wireless signal from said base station;
General Aviation private communication extraction unit, said General Aviation private communication extraction unit are used for extracting the General Aviation exclusive data from said wireless signal; And
General Aviation communication service processing unit, said General Aviation communication service processing unit is used for said General Aviation exclusive data is handled.
5. General Aviation communication system according to claim 1 is characterized in that, said service comprises that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
6. General Aviation communication system according to claim 1 is characterized in that, said land mobile communication network is GSM, IS95, WCDMA, CDMA2000, TD-SCDMA and/or LTE network.
7. General Aviation communication system according to claim 1 is characterized in that, the protocol stack that said General Aviation communication system is used comprises physical layer by being low to moderate height, data link layer, and network layer, transport layer and application layer, wherein
Said physical layer and said data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.
8. General Aviation communication system according to claim 7; It is characterized in that; The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that said general aviation aircraft provides positioning function, and the network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer supports that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
9. General Aviation communication system according to claim 6 is characterized in that, when said land mobile communication network was the LTE network, ground based mobile subscriber and said general aviation aircraft were given with the frequency spectrum resource cross-assignment in said base station.
10. General Aviation communication system according to claim 6 is characterized in that, the sub-district at the current place of said general aviation aircraft is divided into 6 zones, and said General Aviation communication system is used between fast cell and switched, wherein
When said general aviation aircraft got in said 6 zones, respective cell was said general aviation aircraft channel reservation in adjacent 6 sub-districts of base station requests under the current area;
The base station of said respective cell is that said general aviation aircraft distributes a channel reservation, sends to said general aviation aircraft simultaneously and prepares the signaling in district more;
Said general aviation aircraft receives said signaling, when the district takes place more, switches to said channel reservation at once;
District's report is more sent to the base station of said sub-district in the base station of said respective cell; And
The base station of said sub-district is got over the district and is confirmed.
11. a General Aviation communication means is characterized in that, comprising:
Airborne Terminal on general aviation aircraft mobile communications network earthward sends first signal;
Base station usage level antenna and vertical antenna in the said land mobile communication network are transferred to the General Aviation Mobile Information Service Center with said first signal through mobile switching centre in the said land mobile communication network and mobile communication backbone network;
Said aviation Mobile Information Service Center sends secondary signal to said land mobile communication network;
Mobile communication backbone network and mobile switching centre in the said land mobile communication network are transferred to said base station with said secondary signal; And
Said base station uses said vertical antenna and said horizontal antenna that said secondary signal is transferred to said Airborne Terminal to said general aviation aircraft service to be provided.
12. General Aviation communication means according to claim 11 is characterized in that,
Said horizontal antenna is α with respect to the inclination angle of vertical direction, and said horizontal antenna has beam angle θ
h, α>=0 ° wherein; And
Said vertical antenna with respect to the inclination angle of vertical direction be 90 ° and said vertical antenna actinal surface upwards, said vertical antenna has beam angle θ
v, wherein
θ
h+θ
v-2α≥180°。
13. General Aviation communication means according to claim 12 is characterized in that,
Said horizontal antenna and said vertical antenna are at beam angle θ
hWith beam angle θ
vIn gain respectively greater than maximum gain-3dB.
14. General Aviation communication means according to claim 11 is characterized in that, said service comprises that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
15. General Aviation communication means according to claim 11 is characterized in that, said land mobile communication network is GSM, IS95, WCDMA, CDMA2000, TD-SCDMA and/or LTE network.
16. General Aviation communication means according to claim 11 is characterized in that, the protocol stack that said General Aviation communication system is used comprises physical layer by being low to moderate height, data link layer, and network layer, transport layer and application layer, wherein
Said physical layer and said data link layer adapt to employed physical layer of land mobile communication network and data link layer, and voice, navigation and data service are carried on data link layer.
17. General Aviation communication means according to claim 16; It is characterized in that; The transport layer of speech business is used circuit switching; Navigation service estimates through arrival bearing and location algorithm is that said general aviation aircraft provides positioning function, and the network layer of using in the data service is the TCP layer as IP layer, transport layer, and application layer supports that air traffic control is professional, air traffic control is professional, aviation operation management service and aviation passenger communication service.
18. General Aviation communication means according to claim 15 is characterized in that, when said land mobile communication network was the LTE network, ground based mobile subscriber and said general aviation aircraft were given with the frequency spectrum resource cross-assignment in said base station.
19. General Aviation communication means according to claim 15 is characterized in that, the sub-district at the current place of said general aviation aircraft is divided into 6 zones, and the minizone switching of said General Aviation communication system comprises step:
When said general aviation aircraft got in said 6 zones, respective cell was said general aviation aircraft channel reservation in adjacent 6 sub-districts of base station requests under the current area;
The base station of said respective cell is that said general aviation aircraft distributes a channel reservation, sends to said general aviation aircraft simultaneously and prepares the signaling in district more;
Said general aviation aircraft receives said signaling, when the district takes place more, switches to said channel reservation at once;
District's report is more sent to the base station of said sub-district in the base station of said respective cell; And
The base station of said sub-district is got over the district and is confirmed.
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| CN2011102805849A CN102412886A (en) | 2011-09-20 | 2011-09-20 | General aviation communication system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102805849A CN102412886A (en) | 2011-09-20 | 2011-09-20 | General aviation communication system and method |
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