CN105375961B - A kind of satellite band sharing method based on beam-hopping pattern - Google Patents
A kind of satellite band sharing method based on beam-hopping pattern Download PDFInfo
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- CN105375961B CN105375961B CN201510844033.9A CN201510844033A CN105375961B CN 105375961 B CN105375961 B CN 105375961B CN 201510844033 A CN201510844033 A CN 201510844033A CN 105375961 B CN105375961 B CN 105375961B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- 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
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- 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
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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Abstract
The present invention relates to a kind of satellite band sharing methods based on beam-hopping pattern, and telecommunication satellite uses multibeam antenna, and establishes cognition link；By recognizing the information exchange of link, the unauthorized satellite of frequency spectrum obtains the beam-hopping pattern of spectrum authorization satellite, obtains the power that primary user's satellite distribution receives main beam to main beam transmission power and primary user；Secondary user's satellite adjusts the transmission power of itself, and according to primary user's satellite beam-hopping pattern, i.e. primary user's satellite distribution adjusts the beam-hopping pattern of itself to the wave beam forbidden zone radius of main beam according to the beam-hopping pattern of primary user's satellite.Utilize the method for the present invention, secondary user's satellite does not interfere with the normal work of primary user's satellite not only, improves frequency spectrum service efficiency, and since secondary satellite uses smaller wave beam, the low peak income and low contour level of wave beam can be designed using smaller antenna aperature, save hardware cost.
Description
Technical field
The present invention relates to a kind of frequency range multiplexing technology, the satellite band sharing method of beam-hopping pattern is based particularly on.
Background technology
Future communications satellite network and ground network are aggregated on the platform of a standard, provide mobility, fixation jointly
The possibility of property and broadcast service has become an important research hotspot, this also requires telecommunication satellite and ground network to make
With identical frequency range.The rapid development of high-speed wideband and multi-media wireless services causes broadband wireless spectrum requirement to increase, simultaneously
Due to the segmentation of current frequency range and the strategy of static allocation, the available resource of frequency range becomes more and more rare.
In this background, cognition wireless electrical communication technology is a kind of efficiently to be used in the heterogeneous wireless network coexisted
The technology of spectrum efficiency.Using the wireless network of similar frequency bands there are many form of expression, such as two kinds of ground networks combine, and two kinds are defended
The heterogeneous network combination on star combination of network, satellite and ground etc..This technology allows primary user and time custom system to be used in conjunction with
Identical frequency range, so as to license to the normal work of primary user's system frequency band without obstruction.
In satellite communication field, fixed communication satellite service is usually using C-band (4-7GHz) and K-band (ku:11.7-
14.5GHz ka:20-30GHz)；Moving communication satellite service more uses L (1.4-1.6GHz) and S-band (2.2-
2.6GHz), reason is that antenna on plate, better penetration power and smaller atmospheric effect can be used.
The development of ground service (such as 3G, LTE, WiMax and WiFi are serviced), which causes the L and C-band of telecommunication satellite, holds
Continuous pressure.Specifically：World's radio conference in 2000 is directed to Future Data growth requirement problem, and 3G frequency bands are made
Extension：806-960MHz, 1710-1885MH, 2500-2690MHz；LTE：Frequency range 2010-2615MHz；WiFi:2.4GHz、
5GHz WiMax：Main frequency range：2.3GHz, 2.5-2.7GHz, 3.5GHz.High demand and L, the S-band frequency money of broadband service
The limitation in source uses so that fixed satellite service has begun Ku the and Ka wave bands using more multi-frequency.Therefore, explore efficient
Frequency sharing technology improves spectrum efficiency, while ensures that service quality is important studying a question with challenge.This technology
Also the concept of cognition communication technology of satellite has been expedited the emergence of, in two kinds of communication satellite network systems or satellite and ground network system
Spectrum-sharing techniques are developed in system.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of satellite bands based on beam-hopping pattern to be total to
Method is enjoyed, for telecommunication satellite using the difference of the pattern of cognition beam-hopping technology, based on Poewr control method and forbidden zone method,
Secondary satellite adjusts the beam-hopping pattern of itself, while reaching time user's satellite using identical frequency transmission signal, does not influence to lead
The normal work of user's satellite system with telecommunication satellite individually using multiple beam systems or the system ratio of beam-hopping technology, improves
The handling capacity of system.
The object of the invention is achieved by following technical solution：
A kind of satellite band sharing method based on beam-hopping pattern, comprises the following steps：
(1) the mandate satellite of a certain frequency range is primary user's satellite, and unauthorized satellite is time user satellite, primary user's satellite and
Secondary user's satellite is communicated using beam-hopping pattern and terrestrial user, and cognition chain is established between secondary user's satellite and primary user's satellite
Road obtains transmission power and primary user satellite normal work lower interference threshold Grade I of primary user's satellite distribution to wave beam jT；
(2) distance at secondary user i ' and primary user satellite beams j centers is D, and the ground radius surface of the wave beam of wave beam j is R, when
During D≤R, calculate time user's satellite and meet IAGG≤ITWhen, the maximum P of the transmission power of secondary user's satellitest, wherein IAGGIt represents
Secondary user's satellite beams to the interference of primary user's satellite and；Work as D>During R, secondary user's satellite using primary user's satellite wave beam j with
Secondary user communication, the transmission power of secondary user's satellite is total power；
(3) secondary user's satellite calculates the wave beam radius R of primary user's satellite in real timenew, return to step (2), another R=Rnew。
Preferably, the mode of foundation cognition link is between secondary user's satellite and primary user's satellite：Secondary user's satellite and master
Cognition link is established in communication between user's satellite uses star.
Preferably, the mode of foundation cognition link is between secondary user's satellite and primary user's satellite：Secondary user's passing of satelline
Secondary user's ground satellite station gateway and primary user's ground satellite station gateway establish cognition link.
Preferably, time user's satellite is calculated in the step (2) and meets IAGG≤ITWhen, the transmission power of secondary user's satellite
Maximum PstSpecific method be：
G′maxFor secondary user's satellite maximum antenna gain, Jn() is n ranks the first form beta function,
U (i ', j ')=2.01723sin (θ (i ', j '))/sin (θ3dB), θ3dB
For 3dB angles；Gs,i′jRepresent time gain of the user i ' antennas to main beam j；di′j′Represent primary user i to the distance of main satellite.
Preferably, time user's satellite calculates the wave beam radius R of primary user's satellite in real time in the step (3)newMethod
For：
The beam angle θ of primary user's satellite beams 3dB3dBIt represents as follows：
θ3dB=tan-1(R0/D)
Wherein R0For the wide ground radius surface of 3dB wave beams, D is height of primary user's satellite to wave beam j centers；When primary user defends
Star adjusts θ3dBValue when, θnew=θ3dB+ α, α are the wide adjustment amplitude of primary user's satellite beams, and the ground radius surface after adjustment is
Rnew；
Rnew=Dtan θnew。
Preferably, the initial value of R is θ in the step (2)3dBThe wave beam radius of corresponding wave beam j.
Preferably, the frequency range belongs to C-band, L-band, S-band or K-band.
The present invention has the following advantages that compared with prior art：
(1) present invention time user satellite is realized using beam-hopping mode planning mechanism and is shared frequency spectrum with primary user's satellite
Technology improves the service efficiency of frequency range, in the case where the resource of frequency range is limited, can provide service for more users；
(2) using smaller wave beam, the low peak income and low contour level of wave beam can design the present invention time satellite
Using smaller antenna aperature, time satellite antenna design cost is reduced；Low power transmissions may be employed, save the work(of satellite
Consumption；
(3) present invention use the multi beam telecommunication satellite based on beam-hopping mode planning mechanism, with it is existing it is independent use multi beam
The satellite system of system or beam-hopping technology is compared, and improves the handling capacity of satellite communication system；
(4) present invention is directed to the different position of user, is combined, can dynamically adjusted using power control method and forbidden zone method
The transmission power of secondary user's satellite can make full use of the frequency resource of existing main satellite, and time user is allowed preferably to be serviced.
Description of the drawings
Double star multiple beam systems of the Fig. 1 based on cognition beam-hopping technology；
Fig. 2 is the user location schematic diagram of power control method of the present invention；
Fig. 3 is the user location schematic diagram of forbidden zone method of the present invention.
Specific embodiment
Existing multiple beam systems are as follows：
The wave beam bandwidth W that user i is assigned toi：
Wi=W/K
Wherein, W is uplink available bandwidth, and K is frequency duplex factor as one, that is, bandwidth W is divided into K sections.1 ripple
Fascicle has shared whole bandwidth.The wave beam bandwidth W being assigned toi, represent as follows：
Wi=NiWc
NiFor the carrier number of i-th of wave beam, WcFor the band width of carrier wave.
In multi beam satellite system, the minimum value of K is 3.
Existing another kind multiple-beam system：
Each wave beam at least 1 carrier wave, Ni∈{1,2,…,Nmax, Nmax=Nc- (K-1), Nc=W/Wc
Wherein NcFor all available carrier wave numbers.Make NbFor all number of beams in system, then there is Nc×NbBandwidth allocation
Matrix C represents as follows：
Wherein, CijIt represents j-th of carrier wave and distributes to i-th of wave beam, the carrier number for distributing to i-th of wave beam isCij∈ { 0,1 } indicates whether that j-th of carrier wave distributes to i-th of wave beam.
Beam-hopping pattern technology refers to satellite multiple-beam system with fixed repeat pattern while using a certain number of
Wave beam.This technology helps to reduce the requirement of the quantity and load of amplifier on plate to power.With full rate multiplexing or part
Channeling implements beam-hopping technology, and under full rate multiplexing, beam-hopping system, will periodically using regular time window
All available bandwidth allocation gives the wave beam each used.The usage time of each wave beam should meet user's propagation delay time will
It asks；Under partial frequency multiplexing, bandwidth is divided, and each wave beam uses the bandwidth of part.Make NtIt is included for each time window
Number of timeslots, then Nt×NbWave beam represents as follows using matrix T：
Wherein, TijIt represents j-th of time slot and distributes to i-th of wave beam, the timeslot number for distributing to i-th of wave beam isTij∈ { 0,1 } indicates whether that j-th of time slot distributes to i-th of wave beam.
For existing beam-hopping pattern technology, the present invention proposes a kind of method that frequency range is shared：
Step 1：Telecommunication satellite uses multibeam antenna, and establishes cognition link.By recognizing the information exchange of link, frequency
The beam-hopping pattern that unauthorized satellite (secondary user's satellite) obtains spectrum authorization satellite (primary user's satellite) is composed, primary user is obtained and defends
Star distributes to main beam j transmission powers and the lower interference threshold Grade I of primary user's satellite normal workT。
As shown in Figure 1, two telecommunication satellites cover identical ground region, are in identical ground using multiple-wire antenna
Ball synchronization stationary orbit (GEO), and gateway different with ground connects.With the terrestrial links of high speed (such as optical fiber, micro- between gateway
Ripple) connection.In addition, two telecommunication satellites are operated in Ka wave bands (20-21GHz forward links).Primary user's satellite is used to fixed
Family provides the wideband multimedia services of high priority.Secondary user's satellite is used to provide low service quality (QoS) to fixed user
Interactive services.In identical overlay area, primary user's satellite uses larger wave beam, and secondary user's satellite uses smaller ripple
Beam.Spot wave beam of the overlay area by larger main beam and in main beam forms, these spot wave beams are the ripples of time satellite
Beam.
Under beam-hopping (beam hopping) system, in the wave beam that a large amount of deployment have been only used due to primary user's satellite
Fraction wave beam, it is remaining etc. it is to be transmitted in wave beam be in idle condition.If a use is identical with primary user's satellite
The satellite of frequency range, but it is different with the beam-hopping sequence of primary user's satellite, then and satellite as deployment will not defend primary user
Star system causes serious interference, and the frequency efficiency of whole system will be improved.This thought is that primary user's satellite is shared
Its beam-hopping pattern gives time user's satellite, and then secondary user's satellite designs itself according to the beam-hopping pattern of primary user's satellite
Beam-hopping pattern.In order to reach such purpose, primary user's satellite and time user's satellite needs interact, so time user
Satellite just can know that the beam-hopping pattern of primary user's satellite.Interaction can be by the cognition link between gateway station come real
It is existing, it can also be realized by being communicated on star.
The installation of primary user's satellite multiple-beam system can send out number of beams as NbSatellite antenna, and use specific beam-hopping
Pattern.
J-th of beam allocation of primary user's satellite is to the beam gain B of i-th of userij, represent as follows：
Wherein, GmaxFor maximum antenna gain, u (i, j)=2.01723sin (θ (i, j))/sin (θ3dB), θ3dBFor 3dB angles
Degree, θ (i, j) are represented from wave beam j centers to the angle the position line and satellite of user i, Jn() is the first form of n ranks
Beta function (first kind of Bessel ' s function of order n),Γ () is gamma function,
Under the conditions of fine day, the channel coefficients h from primary user's satellite beams j to primary user iijIt represents as follows：
Wherein, Gr,ijRepresent gain of the primary user i reception antennas to main beam j, dijRepresent primary user i to main satellite away from
From,rijIt is distance of the main beam j centers to the position of primary user i, DjFor main satellite to main beam j centers
Highly.
Under the conditions of fine day, primary user's satellite distribution gives main beam j transmission powers, is calculated by formula below：
Wherein γthFor the minimum signal-to-noise ratio (SNR) required under the desired service quality of primary user i (QoS), IcnIt represents
For other beam signals to the interference plus noise of main beam j channels, i ∈ j expression main beams j, which is distributed, is given to primary user i uses.
The reception power P of primary user ir,iWith the power P of wave beam jt,jIt is related, it represents as follows：
Wherein, j={ 1 ..., Nb, i={ 1 ..., M }, M=Nb/ K is total number of users, and K is frequency duplex factor as one.
Step 2：The wave beam forbidden zone radius of secondary user i ' and the distance D at main satellite beams j centers, wave beam j are R, as D≤R
When, using Poewr control method, the transmission power of secondary user's satellite does not influence primary user's satellite normal work；Work as D>It is secondary during R
For user's satellite using the wave beam j and time user communication of primary user's satellite, the transmission power of secondary user's satellite is total power.
Based on Poewr control method, secondary user's satellite according to the beam-hopping pattern of primary user's satellite, i.e. primary user's satellite just
The lower interference threshold of often work, adjusts the transmission power of itself.
Under a certain particular time-slot T, secondary satellite calculates wave beam and the interference of primary user's satellite system is added up to, and is then based on leading
Satellite interference rank, the transmission power for adjusting time satellite meet the interference threshold rank of primary user's satellite.
In a certain particular time-slot T, secondary satellite beams add up to I to the interference of primary user's satelliteAGGIt is represented by
Wherein hi′j′,sBe secondary satellite beams j ' to the channel gain of secondary user i ', Ss be under a certain particular time-slot T, it is secondary
The active beam set of satellite, j ' ∈ Ss represent that wave beam j ' belongs to time active beam set of satellite.
By the cognition link between gateway, the lower interference threshold Grade I of primary user's satellite normal work can obtainT, work as IAGG
≤ITWhen, then the transmission power of secondary satellite represents as follows：
Wherein, Ss be under a certain particular time-slot T, the active beam set of secondary satellite, θ3dBFor 3dB angles；Gs,i′jIt represents
Gain of the secondary user i ' antennas to main beam j；di′j′Represent primary user i to the distance of main satellite.
The wave beam forbidden zone radius of user i and the distance D at main satellite beams j centers, wave beam j are R, work as D>During R, using forbidden zone
Method：
Based on forbidden zone method, secondary user's satellite is according to primary user's satellite beam-hopping pattern, i.e., primary user's satellite distribution is to master
The wave beam forbidden zone radius of wave beam j, adjusts the beam-hopping pattern of itself, and secondary user's satellite can be all using the wave beam j of primary user
Communication, without the concern for the interference to primary user's satellite, total power may be employed in the transmission power of secondary satellite.
Step 3：Secondary user's satellite calculates the wave beam radius R of primary user's satellite in real timenew, return to step 2, another R=Rnew。
The beam angle θ of main satellite beams 3dB3dB(beam width) represents as follows：
θ3dB=tan-1(R0/D)
Wherein, R0For the wide ground radius surface of 3dB wave beams, the i.e. initial value of R；D is height of primary user's satellite to wave beam j centers
Degree, by improving θ3dBValue, θnew=θ3dB+ α, α are the wide adjustment amplitude of primary user's satellite beams, and D is constant, can calculate phase
The radius R answerednew=Dtan θnew.In a certain particular time-slot T, the wave beam of secondary user is only in active main satellite beams forbidden zone half
Footpath RnewIt can be used outside.
The present invention proposes the spectrum-sharing techniques of the double star multi beam communication based on beam-hopping mode planning mechanism, based on primary
The priori of family satellite beam-hopping pattern, secondary user's design of satellites are different from the beam-hopping pattern of primary user's satellite, while double
Star recognizes link switching temporal information by gateway station, based on Poewr control method and forbidden zone method, primary user's satellite and time
User's satellite can be with simultaneous transmission of signals.This technology time user's satellite does not interfere with the normal work of primary user's satellite not only
Make, improve frequency spectrum service efficiency, and since secondary satellite uses smaller wave beam, the low peak income of wave beam and low equivalent water
It is flat to design using smaller antenna aperature, save hardware cost.
The above is only the optimal specific embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (6)
1. a kind of satellite band sharing method based on beam-hopping pattern, it is characterised in that comprise the following steps：
(1) the mandate satellite of a certain frequency range is primary user's satellite, and unauthorized satellite is time user's satellite, and primary user's satellite is used with secondary
Family satellite is communicated using beam-hopping pattern and terrestrial user, and cognition link is established between secondary user's satellite and primary user's satellite,
Obtain transmission power and primary user satellite normal work lower interference threshold Grade I of primary user's satellite distribution to wave beam jT；
(2) distance at secondary user i ' and primary user satellite beams j centers is D, and the ground radius surface of the wave beam of wave beam j is R, as D≤R
When, it calculates time user's satellite and meets IAGG≤ITWhen, the maximum P of the transmission power of secondary user's satellitest, wherein IAGGRepresent time use
Family satellite beams to the interference of primary user's satellite and；Work as D>During R, secondary user's satellite is used using the wave beam j of primary user's satellite with secondary
Family communicates, and the transmission power of secondary user's satellite is total power；
(3) secondary user's satellite calculates the wave beam radius R of primary user's satellite in real timenew, return to step (2), another R=Rnew。
2. the satellite band sharing method based on beam-hopping pattern as described in claim 1, which is characterized in that the step
(1) mode of secondary foundation cognition link between user's satellite and primary user's satellite is in：Secondary user's satellite and primary user's satellite are adopted
Cognition link is established with communication between star.
3. the satellite band sharing method based on beam-hopping pattern as described in claim 1, which is characterized in that the step
(1) mode of secondary foundation cognition link between user's satellite and primary user's satellite is in：Secondary user's passing of satelline time user's satellite
Earth station's gateway and primary user's ground satellite station gateway establish cognition link.
4. the satellite band sharing method based on beam-hopping pattern as described in claim 1, which is characterized in that the step
(3) time user's satellite calculates the wave beam radius R of primary user's satellite in real time innewMethod be：
The beam angle θ of primary user's satellite beams 3dB3dBIt represents as follows：
θ3dB=tan-1(R0/D)
Wherein R0For the wide ground radius surface of 3dB wave beams, D is height of primary user's satellite to wave beam j centers；When primary user's satellite tune
Whole θ3dBValue when, θnew=θ3dB+ α, α are the wide adjustment amplitude of primary user's satellite beams, and the ground radius surface after adjustment is Rnew；
Rnew=D tan θnew。
5. the satellite band sharing method based on beam-hopping pattern as described in claim 1, which is characterized in that the step
(2) initial value of R is θ in3dBThe wave beam radius of corresponding wave beam j.
6. the satellite band sharing method based on beam-hopping pattern as described in claim 1, which is characterized in that the frequency range category
In C-band, L-band, S-band or K-band.
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| CN117014061B (en) * | 2023-09-27 | 2023-12-08 | 银河航天(北京)通信技术有限公司 | Method, device and storage medium for determining satellite communication frequency band |
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| US5668556A (en) * | 1991-10-02 | 1997-09-16 | Alcatel Espace | Low-orbit satellite communications system for terminals |
| CN1325570A (en) * | 1998-09-01 | 2001-12-05 | 艾利森公司 | Asynchronous time division multiplexed packet data transmission system |
| CN101204107A (en) * | 2005-05-11 | 2008-06-18 | 诺基亚西门子通信有限责任两合公司 | Beam-hopping in a radio communications system |
| CN103636143A (en) * | 2011-06-29 | 2014-03-12 | Gogo有限责任公司 | Spectrum sharing between an aircraft-based air-to-ground communication system and existing geostationary satellite services |
| CN104199052A (en) * | 2014-09-22 | 2014-12-10 | 哈尔滨工程大学 | Beam sidelobe suppression method based on norm constraint |
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