CN106612140A - System for coexistence of multiple satellite mobile communication systems - Google Patents
System for coexistence of multiple satellite mobile communication systems Download PDFInfo
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- CN106612140A CN106612140A CN201510708724.6A CN201510708724A CN106612140A CN 106612140 A CN106612140 A CN 106612140A CN 201510708724 A CN201510708724 A CN 201510708724A CN 106612140 A CN106612140 A CN 106612140A
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- mobile communication
- communication system
- satellite mobile
- satellite
- transmission
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
Abstract
The present invention provides a system for coexistence of multiple satellite mobile communication systems. A satellite mobile communication system B is set at the same band of a satellite mobile communication system A. The method comprises the steps that the satellite mobile communication system B builds a transmission channel by using a broadband spread spectrum technology; a communication signal between a satellite and a ground terminal and spectrum sensing results of a forward channel and a reverse channel are transmitted by using the transmission channel; and spectrum resources are configured or adjusted in real time by using the communication signal according to the spectrum sensing results. Through adoption of the method, the newly built satellite mobile communication system and an existing satellite mobile communication system can coexist under the condition of no harmful interference, so that a major problem of building of the new system is solved.
Description
Technical field
The present invention relates to field of satellite mobile communication, more particularly to a kind of satellite mobile communication condition of multi-system coexistence
System.
Background technology
The frequency spectrum resource for being adapted to carry out Global Satellite mobile communication is very limited, with satellite mobile communication demand
Increase, frequency spectrum resource contradiction in short supply, in addition become restriction satellite mobile communication development master
Want bottleneck.Existing satellite mobile communication system design is most to adopt the pattern that radio frequency is forwarded on star, this side
Although formula simplifies the design of space segment, but because signal processing means are single, can only be provided using exclusive frequency
The mode in source carries out the deployment of satellite mobile communication system.Iridium satellite is the low of Base-Band Processing on only employing star
Rail mobile communication constellation systems, its air interface adopts the multi-access mode of TDMA, this design still to need
Monopolize frequency resource.
According to the radio regulation(s) that ITU is formulated, the suitable development that can be used alone has been can not find at present complete
The frequency resource of ball satellite mobile communication service, using traditional frequency isolation, time isolation or spatial separation
It also is difficult to realize coexisting between different satellite mobile communication systems.
Satellite mobile communication is in the neck such as emergency repair, process local accident and navigation and aviation safety guarantee
Domain plays irreplaceable important function.Satellite mobile communication carries the important mission of national security, together
When satellite mobile communication, particularly low orbit satellite mobile communication system constellation systems again with Global coverage attribute,
Therefore satellite mobile communication network demand covering the whole world is built urgent.But by frequency spectrum resource system covering the whole world
About, new satellite mobile communication system of building is difficult to find the frequency resource not used, frequency spectrum resource into
Distinct issues the most are built for new system.
In the radio regulation(s) that ITU is formulated, it is allowed to which interference outside system is less than the 6% of thermal noise power, i.e.,
Other communication system signals for allowing less than thermal noise power 6% enter existing satellite mobile communication system
System.With developing rapidly for electronic technology, particularly integrated circuit technique, set using complex system
Probability of the meter with Project Realization.At present satellite mobile communication is mainly used in emergency repair, processes local
Accident and the field such as navigation and aviation safety guarantee, form and cover complementary office with land mobile communication
Face.Therefore, in different satellite mobile communication systems, there is that business is uneven, reach design capacity
The relatively low phenomenon of likelihood ratio, this is to be existed using the frequency usage cavity wound that finds of frequency spectrum perception technology Real-time and Dynamic
Condition.
The content of the invention
For the problems referred to above, the present invention proposes a kind of system of satellite mobile communication condition of multi-system coexistence, including defending
Star mobile communication system A and the satellite mobile communication system B arranged with frequency range, including：
The satellite mobile communication system B sets up transmission channel using wideband spread spectrum techniques；By the transmission
Communication signaling and forward and reverse channel spectrum sensing results between channel transfer satellite and ground based terminal；According to institute
Frequency spectrum perception result is stated, frequency spectrum resource is configured by the communication signaling or real-time adjustment.
Further, the information of the transmission channel transmission, with satellite mobile communication system A transmission
Information configuration is in identical frequency range, and/or the information configuration with satellite mobile communication system B transmission
In identical frequency range.
Further, the radio-frequency power of the transmission channel is less than the 6% of thermal noise power.
Further, the satellite mobile communication system B monitors at one's leisure the satellite mobile communication system
The idle carrier wave of A；Information transfer is carried out when having business to transmit using the idle carrier wave for monitoring.
Further, the satellite mobile communication system B monitors at one's leisure the satellite mobile communication system
The idle carrier wave of A, carries out information transfer and specifically wraps when there is business to transmit using the idle carrier wave for monitoring
Include：The satellite and ground based terminal of the satellite mobile communication system B, defends in the same frequency range described in monitoring
The carrier wave service condition of star mobile communication system A；The satellite mobile communication is linked up by the transmission channel
The front/rear carrier information used to channel of system B；In the corresponding front/rear carrier position used to channel
Give/receive signal.
Further, also include：It is dry using leaving and taking in the transmission frame of the satellite mobile communication system B
The mode of observation time window is disturbed, real-time Interference Detection in message transmitting procedure is carried out.
Further, also include：In the real-time Interference Detection, if it is logical to detect the satellite movement
Letter system A and satellite mobile communication system B have used identical carrier resource, the satellite mobile communication
System B then carries out carrier resource and quickly matches somebody with somebody again by the transmission channel.
Further, when the disturbance-observer time window takes same or different in different transmission frames
Gap position.
Further, the satellite mobile communication system A and the satellite mobile communication system B are adopted respectively
Polarization isolation is realized with circular polarisation dextrorotation antenna and the left-handed antenna of circular polarisation.
The present invention can realize the satellite mobile communication system and existing satellite mobile communication system of new construction
Coexisting under the conditions of without harmful interference, solves the key issue of new system construction.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to implementing
Example or the accompanying drawing to be used needed for description of the prior art are briefly described, it should be apparent that, retouch below
Accompanying drawing in stating is some embodiments of the present invention, for those of ordinary skill in the art, is not being paid
On the premise of creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the spectrum diagram of system A in the embodiment of the present invention 1；
Fig. 2 be the embodiment of the present invention 1 in system A be superimposed with system B signaling-information after spectrum diagram；
Fig. 3 is power and carrier wave distribution schematic diagram when system A coexists with system B in the embodiment of the present invention 1；
Fig. 4 is that system B signaling information is shared with the signal of frequency range with carrier information in the embodiment of the present invention 1
Figure；
Fig. 5 is power and carrier wave distribution schematic diagram when A systems coexist with B system in the embodiment of the present invention 2；
Fig. 6 is the frame format schematic diagram of the B system in the embodiment of the present invention 2.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that
Described embodiment is a part of embodiment of the invention, rather than the embodiment of whole；It should be noted that
In the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
Every other embodiment, belong to the scope of protection of the invention.
One embodiment of the present of invention proposes a kind of system of satellite mobile communication condition of multi-system coexistence, including satellite
Mobile communication system A and the satellite mobile communication system B arranged with frequency range, including：The satellite movement is logical
Letter system B sets up transmission channel using wideband spread spectrum techniques；By the transmission channel transmitting satellite and ground
Communication signaling and forward and reverse channel spectrum sensing results between terminal；According to the frequency spectrum perception result, lead to
Cross the communication signaling to configure frequency spectrum resource or real-time adjustment.
In one alternate embodiment, the information of transmission channel transmission, with the satellite mobile communication system A
The information configuration of transmission is in identical frequency range, and/or the letter with satellite mobile communication system B transmission
Breath is configured in identical frequency range.
In one alternate embodiment, the radio-frequency power of transmission channel is less than the 6% of thermal noise power.
In one alternate embodiment, satellite mobile communication system B monitors at one's leisure the satellite movement and leads to
The idle carrier wave of letter system A；Information transfer is carried out when having business to transmit using the idle carrier wave for monitoring.
In one alternate embodiment, satellite mobile communication system B monitors at one's leisure the satellite movement and leads to
The idle carrier wave of letter system A, information transfer tool is carried out when there is business to transmit using the idle carrier wave for monitoring
Body includes：The satellite and ground based terminal of the satellite mobile communication system B, in the same frequency range institute is monitored
State the carrier wave service condition of satellite mobile communication system A；The satellite movement is linked up by the transmission channel
The front/rear carrier information used to channel of communication system B；In the corresponding front/rear carrier wave position used to channel
Put transmission/reception signal.
In one alternate embodiment, also include：In the transmission frame of the satellite mobile communication system B,
Using leaving and taking by the way of disturbance-observer time window, real-time Interference Detection in message transmitting procedure is carried out.
In one alternate embodiment, also include：In the real-time Interference Detection, if detected described
Satellite mobile communication system A and satellite mobile communication system B have used identical carrier resource, described to defend
Star mobile communication system B then carries out carrier resource and quickly matches somebody with somebody again by the transmission channel.
In one alternate embodiment, the disturbance-observer time window takes identical in different transmission frames
Or different time slot positions.
In one alternate embodiment, satellite mobile communication system A and satellite mobile communication system B distinguishes
Polarization isolation is realized using circular polarisation dextrorotation antenna and the left-handed antenna of circular polarisation.
The various embodiments described above adopt wide-band spread spectrum communication system, design to lead to less than the signaling of noise power 6%
Road, transmits the communication system necessary signaling of work and forward and reverse channel spectrum sense between satellite and ground based terminal
The result known, according to the result of frequency spectrum perception, using signaling channel the real-time adjustment of frequency spectrum resource is accomplished, from
And realize that different satellite mobile communication systems coexist in the band of same frequency resources.
Embodiment 1
Current many GMR-1 or GMR-2 protocol architectures of existing satellite mobile communication system, the agreement is adopted
The multi-access mode of FDMA/TDMA, the requirement of general its C/N is above 5dB.If existing satellite is moved
Dynamic communication system is system A, if it is system B to need with the new system that system A coexists.The frequency of system A
Spectrum is as shown in Figure 1.By the way of wide-band spread spectrum, superposition one is low on the frequency spectrum of system A for the present embodiment
The signaling-information (dotted line is represented) of system B that the employing spread spectrum mode of power spectral density is launched, two signals
Shown in frequency spectrum Fig. 2 after superposition.
According to the radio regulation(s) that ITU is formulated, as long as the signal power of superposition is less than the 6% of thermal noise,
It is treated as the permission signal power not interfered to original system A.The system B signal C/N being superimposed
To be less than -12.2dB.The system B signaling-information being superimposed is received in view of original system a-signal be one dry
Disturb signal, and the high 5dB of strength ratio thermal noise of this signal, then using wide-band spread spectrum system B C/I
For -18dB.If using 512 times of spread spectrum, spreading gain is up to 27dB, is after so de-spreading
The SNR of system B will be up to 9dB.After considering that despreading is paid no attention to and thinks of and leave certain engineering surplus, this
The extremely weak system B signaling-information of superposition possesses the ability of transmission signaling.
After with most basic interference-free signalling ability, satellite and ground based terminal can for system B
To detect in the band limits of system A the idle carrier wave not used respectively, and before and after being carried out by signaling
The information communication of concrete carrier wave, corresponding system B receiver is used to receive in specified carrier position to channel
Signal, as shown in Figure 3.The carrier wave that wherein carrier wave of dotted line does not take for system A that system B finds
Position, notifies that recipient receives signal at this carrier wave by signaling channel.
System B can be specially to reserve disturbance-observer time window in the frame format of oneself, and this is disturbed
Whether observation window can slide in different time slots, for observation system A using this carrier wave, when being
When system B monitors that system A takes this carrier wave, system B can enter line frequency by signaling channel immediately
The quick of resource is matched somebody with somebody again, purpose is not coexisted by under harmful disturbed condition so as to reach two systems.
System B can also be with oneself system with FDMA side using the signaling information of wide-band spread spectrum system transmission
The information configuration of formula transmission in identical frequency range, as shown in Figure 4.Certainly, in actual system design,
Can be according to particular situations such as frequency spectrum resource, signal transmission power, user density, using different configurations.
Embodiment 2
Maximum satellite mobile communication system covering the whole world at present is Inmarsat, is advised according to ITU radio
Then, its frequency range that can be used is：To satellite 1626.5-1660.5MHz, satellite is to ground on ground：
1525-1559MHz；In addition, the ground that Inmarsat is newly extended in WRC-03 is to satellite
1668-1675MHz, satellite to ground 1518-1525MHz frequency ranges have also transmitted satellite.In this feelings
Under condition, it is available tired without frequency resource that newly-increased satellite mobile communication system will realize that Global coverage is faced with
Border.By taking the downlink design of satellite to ground as an example, actual available frequency resource is
1518-1559MHz, altogether bandwidth 41MHz.
If Inmarsat satellite mobile communication systems are A, intend being moved in the satellite that same frequency range coexists with Inmarsat
Dynamic communication system is B.
The signaling of B system adopts 512 times of spread spectrum, and signal occupied bandwidth is 5MHz after spread spectrum, and spread spectrum increases
Benefit is 27dB.According to the regulation that M.1183 ITU-R coexists with band frequency, the transmission power of other systems
The 6% of thermal noise is should be less than, i.e. the C/N0 of B system signaling channel is up to -12.2dB.Signaling channel solution
Pitch limit is designed as SNR=4dB, then the design margin of signaling channel is -12.2+27-4=10.8dB, and this sets
Meter surplus can meet completely satellite mobile communication system engineering design requirements.
In view of the FDMA systems that already present A systems are frequency interval 200KHz, 41MHz's
205 carrier frequency are had in band limits, A systems carry out networking by frequency reuse 4.Newly-designed B
System in order to preferably with existing A coexistence of systems, design carrier bandwidths be not more than 200KHz.
The B system signaling channel sent using spread spectrum mode is configured in the 5MHz bandwidth of 1518-1523MHz
Interior, the terminal of B system searches for the idle carrier wave of A systems in the range of 41M, when there is business to transmit,
The idle carrier wave that utilizes of Real-time and Dynamic carries out information transfer.Power and carrier wave point when A systems coexist with B system
It is as shown in Figure 5 with relation schematic diagram.
The frame length of B system is designed as 10 milliseconds, and frame format design is as shown in fig. 6, wherein DT is interference inspection
Time window is surveyed, the B system not sending signal in this time window.In order to ensure to FDAM/TDMA's
A system not missing inspections, DT takes different time slot positions in different frames, as taken TS0 in the 0th frame
Position, in the 1st frame the position of TS1, by that analogy, continuous circulating repetition are taken.
Find have interference level to increase by detection time window DT when B system transmission services, then show A
System occupies the carrier wave of correlation, and B system terminal will notify communication payload on star by the signaling channel of spread spectrum
Change carrier wave.The frame length of B system is 10 milliseconds, and from discovery A systems the communication payload on notice star is taken
Change carrier wave most can complete soon in two frame times, i.e., quickly matching somebody with somebody again for carrier frequency resources can be in tens millis
The order of magnitude of second is completed, and now the interference to A systems is very limited, M.1183 regular according to ITU-R,
Within the range of permission.
If 20% idle carrier wave can be found in A systems, will imply that can find 8MHz bandwidth
Frequency resource for used by B system, the capacity of such B system just has practical value.
A system antennas are designed with circular polarisation dextrorotation, and B system Antenna Design is left-handed using circular polarisation, so
There to be at least polarization isolation of 9dB in down channel two systems, using this polarization isolation B is being met
System is to the interference of A systems less than on the premise of thermal noise 6%, it is possible to achieve B system spreading part spreads
C/N0 is promoted to -3.2dB, and this will effectively lift the transmittability of B system spreading part spreads, make B system exist
Most basic communication support can be also realized when merely using wide-band spread spectrum.
By the various embodiments described above as can be seen that the present invention adopts wideband spread spectrum techniques to be less than thermal noise power
6% ultra low power spectrum transmission signaling-information, not to existed system composition in ITU radio regulation(s)s are met
On the premise of interference, solve to be set up without communication system during exclusive frequency resource situation and frequency resource is quickly matched somebody with somebody again
The demand of middle signalling；When system is idle, using frequency spectrum perception technology, the situation that carrier wave is used is monitored,
By the Macro or mass analysis of multiple terminals multizone monitoring result, it is to avoid monitoring blind spot；In transmission frame, adopt and stay
The mode of disturbance-observer time window is taken, real-time Interference Detection in message transmitting procedure is realized；Arrive in real-time detection
Two systems realize what is do not affected by any system transfers using after identical carrier resource using wide-band spread spectrum
Fast resource is matched somebody with somebody again.It is uneven in satellite business development, in the case of there is the available free surplus in more region,
Can realize realizing condition of multi-system coexistence on the premise of ITU radio regulation(s)s are met using the present invention, effectively solution
Current satellite communication system of having determined builds the difficult bottleneck of medium frequency resource coordination.
Claims (9)
1. a kind of system of satellite mobile communication condition of multi-system coexistence, the system includes satellite mobile communication system
The system A and satellite mobile communication system B arranged with frequency range, it is characterised in that include：
The satellite mobile communication system B sets up transmission channel using wideband spread spectrum techniques；By the transmission
Communication signaling and forward and reverse channel spectrum sensing results between channel transfer satellite and ground based terminal；According to institute
Frequency spectrum perception result is stated, frequency spectrum resource is configured by the communication signaling or real-time adjustment.
2. system according to claim 1, it is characterised in that the information of the transmission channel transmission,
The information configuration transmitted with the satellite mobile communication system A is in identical frequency range, and/or defends with described
The information configuration of star mobile communication system B transmission is in identical frequency range.
3. system according to claim 1, it is characterised in that the radio-frequency power of the transmission channel
Less than the 6% of thermal noise power.
4. the system according to claims 1 to 3 any one, it is characterised in that the satellite movement
Communication system B monitors at one's leisure the idle carrier wave of the satellite mobile communication system A；There is business to transmit
The idle carrier wave that Shi Liyong is monitored carries out information transfer.
5. system according to claim 4, it is characterised in that the satellite mobile communication system B
The idle carrier wave of the satellite mobile communication system A is monitored at one's leisure, when there is business to transmit using monitoring
To idle carrier wave carry out information transfer and specifically include：The satellite of the satellite mobile communication system B and ground
Terminal,
The carrier wave service condition of the satellite mobile communication system A is monitored in the same frequency range；
The front/rear carrier waves used to channel of the satellite mobile communication system B are linked up by the transmission channel
Information；
It is corresponding it is front/rear send to the carrier position that channel is used/receive signal.
6. system according to claim 4, it is characterised in that also include：In satellite movement
In the transmission frame of communication system B, using leaving and taking by the way of disturbance-observer time window, message transmitting procedure is carried out
In real-time Interference Detection.
7. system according to claim 6, it is characterised in that also include：In the real-time interference
In detection, if detecting the satellite mobile communication system A and satellite mobile communication system B is used
Identical carrier resource, the satellite mobile communication system B then carries out carrier resource by the transmission channel
Quickly match somebody with somebody again.
8. the system according to claim 6 or 7, it is characterised in that the disturbance-observer time window
Same or different time slot position is taken in different transmission frames.
9. system according to claim 4, it is characterised in that the satellite mobile communication system A
Circular polarisation dextrorotation antenna is respectively adopted with the satellite mobile communication system B and the left-handed antenna of circular polarisation is realized
Polarization isolation.
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| CN201510708724.6A CN106612140B (en) | 2015-10-27 | 2015-10-27 | System for satellite mobile communication multi-system coexistence |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112532310A (en) * | 2020-12-21 | 2021-03-19 | 国网浙江省电力有限公司信息通信分公司 | Satellite emergency communication and ubiquitous satellite Internet of things spectrum sharing method and device |
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| CN106612140B (en) | 2020-04-24 |
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