CN111193539B - On-satellite transparent switching method of high-throughput satellite communication system - Google Patents
On-satellite transparent switching method of high-throughput satellite communication system Download PDFInfo
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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
- H04B7/1851—Systems using a satellite or space-based relay
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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
- 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
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
Abstract
The invention discloses an on-satellite transparent switching method of a high-throughput satellite communication system. Aiming at the requirement of one-path-in-one for coverage of high-capacity and large-bandwidth satellite communication, a high-flux satellite communication system needs to build a plurality of gateway stations abroad and can transmit back to a domestic short plate depending on an international optical cable, a part of frequency bands of user beams are gathered to a homeland feed beam through a satellite user beam and feed beam hinge and communicated with a domestic ground gateway station through a feed beam, so that the high-flux satellite communication is not completely dependent on the limitation of deploying the gateway stations abroad and renting the international optical cable, the use flexibility of the high-flux satellite communication system is improved, and the use scene of the system is expanded. Compared with the traditional high-throughput satellite communication system architecture, the method not only solves the problems that the user beam is high in speed from the user beam to the feed beam and cannot be downloaded through one feed beam, but also solves the problem that the beams cannot be directly connected on the satellite.
Description
Technical Field
The invention belongs to the field of satellite communication, and particularly relates to an on-satellite transparent switching method of a high-throughput satellite communication system.
Background
The national high-throughput satellite plan of China starts from 2017, 7 static orbit satellites are transmitted in succession, in 2023, two satellites are enhanced depending on east and west, the satellite communication capacity of 400Gbps covering the whole Chinese territory and the Asia-Pacific region is formed, the national high-speed satellite communication guarantee requirement of China is met, the global coverage is further realized in 2025, and the total communication capacity reaches about 2 Tbps. The first high-throughput satellite of on-orbit service in China, namely the satellite 16, is transmitted in 2017, a transparent forwarding system is used, the resource allocation mode is that each beam is fixedly allocated, the total number of the beams is 26 user beams and 3 feed beams, the satellite covers the southeast region of China and the offshore 200km sea area of China, and the total capacity is 20 Gbps. Because the total capacity of the satellite is too large, all information cannot be downloaded or uploaded through one gateway station, 3 gateway stations distributed in different areas are needed, satellite beams are divided into 3 groups, and each gateway station is responsible for one group and is connected to a data center through a ground optical cable to jointly complete communication between the data center and satellite loads. In addition, about 50 high-throughput satellites operating in orbit around the world all employ similar network transmission architectures. The network transmission architecture has three main problems: 1) the satellite network relies too much on the ground optical fiber infrastructure, and when natural disasters or ground network optical fiber network failures occur, the high-throughput satellite network can be paralyzed at the same time, which greatly reduces the capability of the satellite communication in the aspect of ensuring emergency communication. 2) The construction of gateway stations in China abroad is difficult. When launching an east-west augmentation satellite or a pacific backbone node satellite in the future, the satellite needs to be connected to a data center through an international optical cable by means of dozens of gateway stations distributed around the world. However, due to many uncertain factors such as politics and economy, building stations abroad can face many challenges, so that the network building speed is delayed. 3) Some important user requirements cannot be met. Information is transmitted back to the interior by means of an international optical cable, so that the problems of information leakage and safety are further caused, and part of information related to national benefits or core business secrets cannot be transmitted through a high-throughput satellite communication system. The invention fully considers the problems and provides a satellite transparent switching technology of a high-throughput satellite communication system, which realizes the hinge of user beams and feed beams through a satellite microwave matrix and can realize the convergence of partial resources of all user beams of the whole network to a homeland feed beam, so that partial users and services do not depend on ground optical fibers completely and directly fall back to a domestic gateway station and are transmitted to a data center. Further, due to the existence of the microwave matrix, configuration information is uploaded through service operation control, a one-hop direct connection communication mode that users do not depend on a ground gateway station among beams can be achieved, the use efficiency of network resources is improved, and the system has the capability of independent operation without the ground under emergency conditions.
Disclosure of Invention
Aiming at the technical problem, the invention provides an on-satellite transparent switching method of a high-throughput satellite communication system.
The technical scheme of the invention is as follows: a transparent switching method on a high-throughput satellite communication system satellite comprises the following steps:
step one, establishing a high-flux satellite communication system:
establishing a high-flux satellite communication system consisting of 1 GEO high-flux satellite, 3 high-flux satellite gateway stations distributed in different areas and 1 high-flux ground data center deployed in China; the GEO high-flux satellite has M user beams and 3 feed beams, and the 3 high-flux satellite gateway stations are connected to the high-flux ground data center through ground optical fibers;
the GEO high-flux satellite has M user beams and 3 feed beams, and the payload of the GEO high-flux satellite comprises a microwave exchange matrix, M user multi-beam receiving antennas and transmitting antennas, 3 feed receiving antennas and transmitting antennas, and S x (M)I+MK+MJ) The double-pole double-throw duplex waveguide switch also comprises a low noise amplifier, a traveling wave tube power amplifier and a feed information processor which are needed for realizing the communication function;
abstracting a network architecture based on the high-throughput satellite communication system, and analyzing, wherein the network architecture comprises 3 working modes:
(1) and (3) a traditional working mode: the conventional mode of operation, which may also be referred to as a transparent mode, is the same as the existing high-throughput satellite communication system, with each high-throughput satellite gateway station GiIs solely responsible for its corresponding feed beam FiThe information of (3) is uploaded or downloaded; feed beam FiThe corresponding user beam is also fixed, i.e. M1FiTo MjFiA total of j user beams; the high-flux ground data center is connected with 3 gateway stations through ground optical fibers, and each high-flux satellite gateway station is responsible for user beams fixedly distributed by the high-flux satellite gateway station; the information exchange of the users among the user beams can be completed only by two-hop communication of a high-throughput ground data center;
(2) user to high-flux satellite gateway station transparent switching mode of operation: the high-flux ground data center generates a user-to-high-flux satellite gateway station according to the task requirement of the userTransparent switching network planning and service configuration information; initiating service configuration information by a high-throughput ground data center service operation control module through 3 high-throughput satellite gateway stations; the high-throughput ground data center respectively formulates service configuration information required to be annotated by 3 high-throughput satellite gateway stations according to network configuration requirements and user beam conditions hosted by the high-throughput satellite gateway stations, and distinguishes the service configuration information through address fields of the high-throughput satellite gateway stations; the service configuration type is a working mode switching instruction, namely a user to high-flux satellite gateway station transparent switching working mode; the microwave matrix transmits the RF signals allocated for transparent switching to the feed beam F according to the relation table1，F1Is a homeland wave beam; after the service configuration information is stared, the waveguide change-over switch and the microwave switching matrix execute the instruction of the high-flux ground data center, and the high-flux satellite communication system is switched to a transparent switching working mode of a user-high-flux satellite gateway station; the high-throughput ground data center initiates a mode switching instruction to a ground online user corresponding to the network segment which has undergone the switching of the working mode through a signaling link, and the user equipment is synchronously switched to a transparent switching mode;
and for the users without the transparent switching service requirement, the high-throughput ground data center background switches the equipment to the traditional working mode network segment. In this mode, the user equipment, the beam and the beam segment network segment which do not receive the high-throughput ground data center switching instruction can still normally work in the traditional working mode.
(3) One-hop direct connection working mode among user beams: the high-throughput ground data center generates one-hop direct connection work network planning and service configuration information among user beams according to the task requirements of users; initiating service configuration information by a high-throughput ground data center service operation control module through 3 high-throughput satellite gateway stations; the high-throughput ground data center respectively formulates service configuration information required to be annotated by 3 high-throughput satellite gateway stations according to network configuration requirements and user beam conditions managed by the high-throughput satellite gateway stations; the service configuration type is a working mode switching instruction, namely, the switching is carried out to an inter-beam one-hop direct-connection working mode; the user beam distribution value gives the waveguide switch number and the correspondingA state value; the same family F is given by the microwave matrix relation table1User beam MiF1The same direct connection relationship between the same and belong to F2User beam MkF2The direct connection relationship between the two and the same belong to F3User beam MjF3The direct connection relation between the microwave matrix and the microwave matrix can be further provided with MiF1、MkF2、MjF3The direct connection relation among any beams realizes one-hop direct connection communication of part of network segment resources in all available beams of the high-throughput satellite; after the service configuration information is stared, the waveguide switch and the microwave switching matrix execute the instruction of the high-flux ground data center, and the high-flux satellite communication system is switched to a one-hop direct connection working mode among user beams; the high-throughput ground data center initiates a mode switching instruction to a ground online user corresponding to the network segment which has undergone the switching of the working mode through a signaling link, and the user equipment is synchronously switched to a one-hop direct connection mode between user beams;
and for users without the requirement of one-hop direct connection service between beams, keeping the working mode of the users, and switching the equipment to the traditional transparent mode network segment under the beams or the transparent exchange working mode from the users to the gateway station by the high-throughput ground data center background. In this mode, the user equipment, the beam and the beam segment which do not receive the high-throughput ground data center switching instruction can still normally work in the traditional working mode or the user-to-gateway station transparent switching working mode.
Further, in the above solution, the microwave switch matrix is a core function module for completing transparent switching on a satellite of a high throughput satellite communication system. The function of the microwave switching matrix is to perform partial resources of all user beams of the whole satellite and a homeland feed beam F1The hinge interconnection realizes that the user directly lands on the ground at home without depending on the international ground optical fiber or realizes one-hop direct connection of partial resources among user beams. The microwave switching matrix is composed of 3 groups of band-pass filters, a low noise amplifier, a frequency point conversion module, a power equalization module, 1 group of switching matrix module, and a multiplexing and demultiplexing module, as shown in fig. 3. If these devices are all digital processing devices, there is a need forThe front end of each group of filters is added with an A/D conversion module, and the rear end of the multiplexing and de-multiplexing module is added with a D/A conversion module, so that the realization method can be realized by combining logic gate chips of an aerospace grade DSP, an FPGA, an ASIC and the like for programming.
Further, in the above scenario, the user is directed to a high-throughput satellite gateway station F1The communication link implementation process comprises the following steps: user UMiF2Sending signals to the wave beam where the wave beam is located, and carrying out frequency point transformation on the signals after the signals pass through a satellite-borne multi-beam antenna, a band-pass filter and a low-noise amplifier to realize the isolation of the signals entering a switching matrix on a frequency domain; then the signal is transmitted to a multiplexing module to multiplex the multi-path signals of different wave beam users into a path of complex signal, and then the complex signal passes through a feed antenna F1And then transmitted back to the homeland gateway station.
Further, in the above scheme, the high throughput satellite gateway station F1The communication link to the user is realized by the following procedures: the data center inquires the working mode of a target user in the resource pool by analyzing the routing address of a user data packet, the communication mode used by the target user of the data packet is definite, and if the target user is a user in the working state of the traditional mode, the high-throughput satellite gateway station can send information to a corresponding user beam M through a direct linkiF1(ii) a If the intended user is in the transparent switching mode of operation, the high-throughput satellite station first transmits signals to the feed beam F1The feed beam sends the signal to the de-multiplex module, after de-multiplex, the exchange matrix exchanges the signal to the corresponding beam according to the exchange relation configured by the network, and the signal is transmitted to the beam of the target user after power balance, frequency point conversion and power amplification.
Further, in the above scheme, the implementation procedure of the communication link from the user beam to the user beam is as follows: the data center already determines a user beam M through network planning according to the user requirementiF1、MkF2And MjF3The interconnection relation between all network segments is uploaded to the feed processor through the service configuration information, and the feed processor respectively controls the waveguide change-over switch and the microwave switching matrix to be connected to corresponding connection states after receiving the instruction(ii) a User UMiF2Sending signals to the local beam MiF2After receiving the signal, the antenna is connected to the microwave exchange matrix through the waveguide switch; the microwave exchange matrix carries out band-pass filtering processing, low-noise amplification, frequency band conversion and power equalization on the signals, then the signals are sent to the exchange matrix for exchange, and the wave beam M of a target user is selectedkFnAnd finally received by the target user terminal after being transmitted by the power amplifier and the antenna.
Further, in the above scheme, the service configuration information includes 4 fields of a service configuration type, a gateway station address, a user beam allocation value, and a microwave matrix relation table; the service configuration type specifies the use of the configuration information, and comprises a satellite working mode switching instruction, namely a user-to-gateway station transparent switching working mode, a traditional working mode and an inter-beam one-hop direct-connection working mode; the user beam allocation value, which is typically a specific waveguide switch number, refers to the resource that each beam needs to take out for transparent switching. E.g. for user beam MjFiThe microwave switch comprises S ═ Si,jI ═ 1,2, …, I }, each microwave switch generally represents a division of frequency resources, I microwave switches divide the user beam into I segments, and transparent switching can arbitrarily select 1 to I resources from the I segments according to requirements and switch the resources into a microwave matrix. The microwave matrix relation table is a microwave exchange information table generated by the data center according to the transparent exchange network plan and used for determining the user beam MjFiAnd the transmission waveguide path corresponding to the middle segment i.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional high-flux satellite, the load on the satellite of the high-flux satellite communication system on-satellite transparent exchange transmission system increases the microwave exchange matrix module, thereby realizing the flexibility of on-satellite architecture. The method not only solves the problem that the bandwidth from the user beam to the feed beam is too large and the user cannot pass back through one feed beam, but also solves the problem that the user cannot directly connect on the satellite between the beams. The dependence of the high-flux satellite communication system on the ground optical cable can be effectively reduced, the capability of the system for serving users with different safety requirements and service requirements is improved, and the system applicability of the system in special emergency scenes such as natural disasters is enhanced.
Drawings
FIG. 1 is a transparent switching transport network architecture for a high throughput satellite communication system in accordance with the present invention;
fig. 2 is a service configuration information structure;
FIG. 3 is a block diagram of a microwave switching matrix;
fig. 4 is a block diagram of GEO high-throughput satellite transparent switching payload.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
Examples
1. System components
The high-flux satellite communication system consists of 1 GEO high-flux satellite, 3 high-flux satellite gateway stations (at least one of which is domestically deployed) distributed in different areas and 1 high-flux ground data center domestically deployed;
GEO high-throughput satellites have M user beams, 3 feeder beams,
the 3 gateway stations are connected to the data center through ground optical fibers to form a high-throughput satellite communication system, and a network architecture is abstracted based on the high-throughput satellite communication system, as shown in fig. 1.
1.1 satellite payload composition
The difference of the satellite payload structure is that the invention is the biggest difference with the traditional high-throughput satellite fixed beam resource distribution satellite load. Specifically, the satellite payload section of the present invention comprises a microwave switching matrix, M user multi-beam receiving and transmitting antennas, 3 feed receiving and transmitting antennas, sx (M)I+MK+MJ) A double-pole double-throw duplex waveguide switch and a packageThe satellite load modules including low noise amplifiers, traveling wave tube power amplifiers, feed information processors and the like required for realizing the communication function are consistent with a typical high-flux satellite, so that the details are not repeated.
1.2 microwave switching matrix formation
The microwave exchange matrix is used as an important component module of satellite effective load and is a core function module for completing transparent exchange on a satellite of a high-flux satellite communication system. The function of the microwave switching matrix is to perform partial resources of all user beams of the whole satellite and a homeland feed beam F1The hinge interconnection realizes that the user directly lands on the ground at home without depending on the international ground optical fiber or realizes one-hop direct connection of partial resources among user beams. The microwave switching matrix is composed of 3 groups of band-pass filters, a low noise amplifier, a frequency point conversion module, a power equalization module, 1 group of switching matrix modules, a multiplexing module and a demultiplexing module and the like, as shown in fig. 3. If the devices are digital processing devices, an A/D conversion module is added at the front end of each group of filters, and a D/A conversion module is added at the rear end of the multiplexing and demultiplexing module, so that the implementation method can be realized by programming logic gate chips such as a combined aerospace grade DSP, an FPGA, an ASIC and the like.
So far, the invention constructs a high-throughput satellite communication system transmission network architecture with transparent switching capability, as shown in fig. 1, the network has the capability of realizing communication without depending on international optical fibers and also can independently form a network without depending on a ground network.
2. Transparent switching protocol design
2.1 resource partitioning
Based on the above-mentioned construction of the network architecture of the system, the system is divided into the following resources of the form 3)
1) Transparent resources: the transparent exchange resource is the inherent resource of the high-throughput satellite, if the whole satellite throughput of the high-throughput satellite is W, the transparent resource can realize maximization under the condition that the transparent exchange and the inter-beam exchange are not required, namely the transparent resource WPW is less than or equal to W. In particular, the transparent resource WPLess than or equal to the sum of available bandwidths of all user beams of the whole satellite
2) Transparent switching of resources: in general, the resources transparently switched by the users only provide services for a part of users abroad, that is, only the user beams covered abroad have the requirement of the transparent switching operation mode. However, in consideration of emergency needs such as natural disasters, even in China, the possibility of unavailability of optical fibers exists, and therefore the transparent switching resource defined by the invention is the capacity of each user beam. And according to the network planning and service configuration information, the conversion from the transparent mode to the transparent switching mode of the network segment resource access in the wave beam is realized by controlling the direction of the waveguide switch. For transparent switching resources WSIn other words, the minimum granularity of resources switched by the method is a network segment, i.e. a part of frequency band, in a user beam, and each network segment is specifically switched by a switch S ═ Si,jI | 1,2, …, I } control. However, each network segment not only has users required for a transparent exchange communication mode, but also has users working in a traditional mode, and when a satellite resource mode is switched, a network manager also needs to synchronously perform network segment migration on the related traditional users in the network. Thus, W can be obtainedP+WS＝W。
3) The resources are exchanged between the beams. On the basis of the transparent switching resources, the microwave switching matrix can also determine which transparent switching resources are used for direct connection of users between wave beams according to the service configuration information. The working modes of direct connection on the satellite are divided into two situations, namely direct connection between beams and direct connection in beams. In the case of direct connection between beams, the user
With a certain user in other beams
The communication can work in the same frequency band without mutual interference according to the characteristic of multi-beam satellite frequency reuse. For direct communication of different users in the same beam, users
The uplink frequency band is subjected to microwave exchange matrix filtering, frequency point conversion, power equalization and exchange, and then is subjected to frequency point conversion and band-pass filtering again and is downloaded to another user in the wave beam
Interference should be avoided within the beam by frequency discrimination.
2.2 microwave exchange design
User to high flux satellite gateway station F1Communication link of (2): user' s
And transmitting signals to the beam where the switching matrix is located, and performing frequency point conversion on the signals after the signals pass through the satellite-borne multi-beam antenna, the band-pass filter and the low-noise amplifier to realize the isolation of the signals entering the switching matrix on a frequency domain. Then the signal is transmitted to a multiplexing module to multiplex the multi-path signals of different wave beam users into a path of complex signal, and then the complex signal passes through a feed antenna F1And then transmitted back to the high-throughput satellite gateway station in the country.
High-throughput satellite gateway station F1Communication link to user: the high-flux ground data center inquires the working mode of a target user in a resource pool by analyzing the routing address of a user data packet, the communication mode used by the target user of the data packet is definite, and if the target user is a user in a traditional mode working state, the high-flux satellite gateway station can send information to a corresponding user beam M through a direct linkiF1(ii) a If the intended user is in the transparent switching mode of operation, the high-throughput satellite station first transmits signals to the feed beam F1The feed beam sends the signal to the de-multiplex module, after de-multiplex, the exchange matrix exchanges the signal to the corresponding beam according to the exchange relation configured by the network, and the signal is transmitted to the beam of the target user after power balance, frequency point conversion and power amplification.
User beam-to-user beam direct connection communication link: the high-throughput ground data center is determined to be used by network planning according to the requirements of usersBeam MiF1、MkF2And MjF3The interconnection relation between all network segments is uploaded to the feed processor through the service configuration information, and the feed processor respectively controls the waveguide change-over switch and the microwave exchange matrix to be connected to corresponding connection states after receiving the instruction. User' s
Sending signals to the local beam MiF2After receiving the signal, the antenna is connected to the microwave exchange matrix through the waveguide switch. The microwave exchange matrix carries out band-pass filtering processing, low-noise amplification, frequency band conversion and power equalization on the signals, then the signals are sent to the exchange matrix for exchange, and the wave beam M of a target user is selectedkFnAnd finally received by the target user terminal after being transmitted by the power amplifier and the antenna.
2.3 communication technology regime selection
The satellite system comprises a traditional working mode, a user-to-high-flux satellite gateway station transparent exchange working mode and a user beam one-hop direct connection working mode, wherein the three working modes share a resource pool of the whole high-flux satellite, and for the network management of the whole network, the three working modes are generally simultaneous. When the user quantity of the one-hop direct connection working mode between the user transparent exchange working mode and the user beam of the high-flux satellite gateway station is small, the network manager can switch most resources to be used in the traditional working mode.
Under the condition of a traditional working mode, an international standard communication technical system, namely a forward DVB-S2/DVB-SX system, can be selected to realize high-speed and high-capacity downloading of TDM large carriers; the backward direction can adopt DVB-RCS2 system to realize multi-frequency time-sharing MF-TDMA multi-user return at the same time, and the forward link and the backward link are asymmetric links with typical service characteristics of the internet. The physical topology of the network is a star network, the structures such as a mesh network, a star network, a hybrid topology network and the like can be realized logically, the communication between the user satellite terminal and the ground network is single-hop communication, and the communication between the user satellite terminals is double-hop communication.
In the case of a transparent exchange working mode of a user to a high-flux satellite gateway station, although signal level exchange processing is performed on a satellite, because the user is directly controlled by a high-flux ground data center, communication between the user and the user also needs to pass through the ground and is not directly interconnected, all information needs to be modulated, demodulated, coded, decoded and the like on the ground to process signals and information, the network topology is consistent with the traditional working mode, and a communication system can conform to the traditional working mode without change. But the traffic control channel needs to add signaling information for controlling the user terminal.
The one-hop direct connection working mode condition between user beams is greatly different from the former two modes, and under the one-hop direct connection mode, user and user service information are directly interconnected and transmitted. The forward link and the reverse link are typical symmetrical links, the speed requirement is generally not high, and if the number of users among direct-connected beams is less, the operation is more efficient by adopting a Frequency Division Multiple Access (FDMA) mode; if there are more users between the direct beams, it is more efficient to work in Time Division Multiple Access (TDMA).
In summary, the transparent switching network constructed by the present invention is considered to support both the DVB international standard and the FDMA and TDMA standard systems.
2.4 service configuration information query and maintenance
Service configuration information is typically generated, updated and maintained by high throughput terrestrial data centers. The high-flux ground data center receives and counts the network entering and exiting states and the work mode request information of all the users in the network, and marks the address, the work mode, the number of the located wave beam, the network segment number, the corresponding feed and high-flux satellite gateway station number of each user. Meanwhile, the statistical satellite is respectively used for beam numbers, network segment numbers, user number, user network access and exit, resource occupation and resource surplus conditions of a traditional working mode, a user-to-high-flux satellite gateway station transparent exchange working mode and a user one-hop direct connection working mode. The high-throughput ground data center reserves 10% of resources for each working mode, estimates the increase and decrease conditions of users of 3 working mode users in the network within a certain time in the future through historical knowledge and the network access and quit conditions of the users, and respectively allocates resource pools for the users, namely the beam number, the network segment number, the power and the speed of corresponding feed, the number of a high-throughput satellite gateway station, the capacity and the total bandwidth of supportable users and the like contained in the traditional working mode; the transparent exchange working mode comprises a wave beam number, a network segment number, power and speed of corresponding feed, a number of a high-flux satellite gateway station, capacity of a supportable user, total bandwidth and the like; the inter-beam direct connection working mode comprises a beam number, a network segment number, a speed, capacity capable of supporting a user, a total bandwidth and the like. And the high-throughput ground data center generates an optimal network plan according to a certain learning optimization algorithm, obtains service configuration information, and injects the service configuration information to the satellite feed processor, and the feed processor executes instructions, operates the effective load to respond, and completes network state updating. When a new work mode switching request is made by an online user, the high-throughput ground data center receives and counts user requirements, formulates network planning, generates service configuration information, sends the service configuration information to a satellite in a fixed period (second level), and sends signaling information to users of which the mode needs to be changed to finish maintenance of the service configuration information.
Although the invention has been described with reference to a number of embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A transparent switching method on a high-throughput satellite communication system satellite is characterized by comprising the following steps:
step one, establishing a high-flux satellite communication system:
establishing a high-flux satellite communication system consisting of 1 GEO high-flux satellite, 3 high-flux satellite gateway stations distributed in different areas and 1 high-flux ground data center deployed in China; the 3 high-flux satellite gateway stations are connected to the high-flux ground data center through ground optical fibers;
the GEO high-flux satellite has M user beams and 3 feed beams, and the payload of the GEO high-flux satellite comprises a microwave exchange matrix, M user multi-beam receiving antennas and transmitting antennas, 3 feed receiving antennas and transmitting antennas, and S x (M)I+MK+MJ) The double-pole double-throw duplex waveguide switch also comprises a low noise amplifier, a traveling wave tube power amplifier and a feed information processor which are needed for realizing the communication function;
abstracting a network architecture based on the high-throughput satellite communication system, and analyzing, wherein the network architecture comprises 3 working modes:
(1) and (3) a traditional working mode: each high-throughput satellite gateway station GiIs solely responsible for its corresponding feed beam FiThe information of (3) is uploaded or downloaded; feed beam FiThe corresponding user beam is also fixed, i.e. M1FiTo MjFiA total of j user beams; the high-flux ground data center is connected with 3 gateway stations through ground optical fibers, and each high-flux satellite gateway station is responsible for user beams fixedly distributed by the high-flux satellite gateway station; the information exchange of the users among the user beams can be completed only by two-hop communication of a high-throughput ground data center;
(2) user to high-flux satellite gateway station transparent switching mode of operation: the high-flux ground data center generates user to high-flux satellite gateway station transparent switching network planning and service configuration information according to the task requirements of the user; initiating service configuration information by a high-throughput ground data center service operation control module through 3 high-throughput satellite gateway stations; the high-throughput ground data center respectively formulates service configuration information required to be annotated by 3 high-throughput satellite gateway stations according to network configuration requirements and user beam conditions hosted by the high-throughput satellite gateway stations, and distinguishes the service configuration information through address fields of the high-throughput satellite gateway stations; the service configuration type is a working mode switching instruction, namely a user to high-flux satellite gateway station transparent switching working mode; the microwave matrix transmits the RF signals allocated for transparent switching to the feed beam F according to the relation table1，F1Is a homeland wave beam; after business configuration information comes to the star, the waveguide switch and the microwave exchange matrix are executedThe high-flux satellite communication system is switched to a user-to-high-flux satellite gateway station transparent exchange working mode according to an instruction of the high-flux ground data center; the high-throughput ground data center initiates a mode switching instruction to a ground online user corresponding to the network segment which has undergone the switching of the working mode through a signaling link, and the user equipment is synchronously switched to a transparent switching mode;
(3) one-hop direct connection working mode among user beams: the high-throughput ground data center generates one-hop direct connection work network planning and service configuration information among user beams according to the task requirements of users; initiating service configuration information by a high-throughput ground data center service operation control module through 3 high-throughput satellite gateway stations; the high-throughput ground data center respectively formulates service configuration information required to be annotated by 3 high-throughput satellite gateway stations according to network configuration requirements and user beam conditions managed by the high-throughput satellite gateway stations; the service configuration type is a working mode switching instruction, namely, the switching is carried out to an inter-beam one-hop direct-connection working mode; the user beam distribution value gives the serial number of the waveguide switch and the corresponding state value; the same family F is given by the microwave matrix relation table1User beam MiF1The same direct connection relationship between the same and belong to F2User beam MkF2The direct connection relationship between the two and the same belong to F3User beam MjF3The direct connection relation between the microwave matrix and the microwave matrix can be further provided with MiF1、MkF2、MjF3The direct connection relation among any beams realizes one-hop direct connection communication of part of network segment resources in all available beams of the high-throughput satellite; after the service configuration information is stared, the waveguide switch and the microwave switching matrix execute the instruction of the high-flux ground data center, and the high-flux satellite communication system is switched to a one-hop direct connection working mode among user beams; the high-throughput ground data center initiates a mode switching instruction to a ground online user corresponding to the network segment which has undergone the switching of the working mode through a signaling link, and the user equipment is also synchronously switched to the one-hop direct connection mode between user beams.
2. The on-board transparent switching method for the high-throughput satellite communication system according to claim 1, wherein the microwave switching matrix comprises 3 sets of band-pass filters, low noise amplifiers, frequency point conversion modules, power equalization modules, 1 set of switching matrix modules, and multiplexing and demultiplexing modules.
3. The on-board transparent switching method for high throughput satellite communication system as claimed in claim 1, wherein the user is to a high throughput satellite gateway station F1The communication link implementation process comprises the following steps: user UMiF2Sending signals to the wave beam where the wave beam is located, and carrying out frequency point transformation on the signals after the signals pass through a satellite-borne multi-beam antenna, a band-pass filter and a low-noise amplifier to realize the isolation of the signals entering a switching matrix on a frequency domain; then the signal is transmitted to a multiplexing module to multiplex the multi-path signals of different wave beam users into a path of complex signal, and then the complex signal passes through a feed antenna F1And then transmitted back to the homeland gateway station.
4. The on-board transparent switching method for high throughput satellite communication system according to claim 1, wherein said high throughput satellite gateway station F1The communication link to the user is realized by the following procedures: the data center inquires the working mode of a target user in the resource pool by analyzing the routing address of a user data packet, the communication mode used by the target user of the data packet is definite, and if the target user is a user in the working state of the traditional mode, the high-throughput satellite gateway station can send information to a corresponding user beam M through a direct linkiF1(ii) a If the intended user is in the transparent switching mode of operation, the high-throughput satellite station first transmits signals to the feed beam F1The feed beam sends the signal to the de-multiplex module, after de-multiplex, the exchange matrix exchanges the signal to the corresponding beam according to the exchange relation configured by the network, and the signal is transmitted to the beam of the target user after power balance, frequency point conversion and power amplification.
5. The on-board transparent switching method for high throughput satellite communication system as claimed in claim 1Characterized in that, the communication link from the user beam to the user beam is realized by the following steps: the data center already determines a user beam M through network planning according to the user requirementiF1、MkF2And MjF3The interconnection relation between all network segments is uploaded to the feed information processor through the service configuration information, and the feed information processor respectively controls the waveguide change-over switch and the microwave switching matrix to be connected to corresponding connection states after receiving the instruction; user UMiF2Sending signals to the local beam MiF2After receiving the signal, the antenna is connected to the microwave exchange matrix through the waveguide switch; the microwave exchange matrix carries out band-pass filtering processing, low-noise amplification, frequency band conversion and power equalization on the signals, then the signals are sent to the exchange matrix for exchange, and the wave beam M of a target user is selectedkFnAnd finally received by the target user terminal after being transmitted by the power amplifier and the antenna.
6. The on-board transparent switching method for the high throughput satellite communication system according to claim 1, wherein the service configuration information comprises 4 fields of service configuration type, gateway station address, user beam allocation value, microwave matrix relation table; the service configuration type specifies the use of the configuration information, and comprises a satellite working mode switching instruction, namely a user-to-gateway station transparent switching working mode, a traditional working mode and an inter-beam one-hop direct-connection working mode; the user beam distribution value refers to the resource which needs to be taken out by each beam and is used for transparent switching, the distribution value is a specific waveguide switch number, and the microwave matrix relation table is a microwave exchange information table which is generated by the data center according to transparent switching network planning and is used for determining the user beam MjFiAnd the transmission waveguide path corresponding to the middle segment i.
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