Multi-domain flexible application-oriented digital transparent processing implementation system and method

Abstract

The invention discloses a multi-domain flexible application-oriented digital transparent processing implementation system and method, and the system employs a three-level mapping function to combine with broadband digital channel processing and large-scale sub-band switching to form an integrated, multi-level and multi-dimensional processing architecture based on a channel processing plane, a beam processing plane and a switching processing plane. The multi-domain flexible application-oriented digital transparent processing forwarding requirements with a large number of ports, large port bandwidth and large processing capacity are effectively met, system-level full-array beam forming and full-beam and full-frequency sub-band switching can be realized, and the multi-domain flexible application-oriented digital transparent processing forwarding method has good expansibility and system reliability and can be widely applied to the field of multi-domain flexible application. The bottleneck that full-feed-source beam forming and full-beam and full-frequency sub-band flexible switching functions cannot be realized due to limitation of a conventional processing realization framework, the number of data transmission nodes, single-node data transmission capability and the like is effectively broken through.

Description

Technical Field

[0001] The present invention belongs to the technical field of digital transparent processing and forwarding, and in particular relates to a digital transparent processing implementation system and method for multi-domain flexible applications. Background Art

[0002] With the rapid development of ground satellite communication application technology, traditional communication satellites can only provide transponders with fixed service modes, which are far from meeting the needs of real applications. While continuously increasing the system capacity, communication satellites are required to improve the flexibility of the system, that is, during the service period of the satellite in orbit, it can dynamically adjust the on-board resources according to the business model or demand changes, continuously provide satellite communication services, and realize the flexibility of the satellite.

[0003] The new generation of digital transparent processors that apply "digital transparent processing technology" adopts all-digital processing and forwarding technology to solve the problems of fixed forwarding methods, fewer forwarding paths, and inability to dynamically adjust traditional analog transparent repeaters. While meeting the needs of large-capacity forwarding, the system has the ability to reconfigure tasks within its life cycle and has the ability to "flexibly adjust". It can greatly enhance the flexibility of the satellite system, and has outstanding advantages such as flexible allocation of frequency / power resources, flexible and variable link connections, strong multi-system support capabilities, and flexible resource management and optimization. The satellite can provide flexible system service areas, operating frequencies, beam bandwidths, and communication capacity adjustments and reallocation capabilities in orbit. The satellite has the ability to readjust services in orbit, as well as the ability to gradually deploy gateways and adjust satellite coverage areas.

[0004] In response to the demand for flexible application of communication satellites in frequency domain, time domain, spatial domain, power domain and service domain, a multi-level and multi-dimensional digital transparent processing implementation method is proposed based on digital channelization, hybrid of transmit and receive grouping and mapping, combined with sub-band level beamforming and sub-band routing switching. The method can realize full-beam and full-frequency band switching at the sub-band level from the input port to the output port of the antenna feed, which can meet the system's flexible application requirements in multiple dimensions such as frequency, power, beam and service.

[0005] Reference 1 “Requirement Analysis and Solution Design of Onboard Digital Processing Devices for Mobile Communication Satellites” (Liu Naijin, Chen Dong, Liang Zongchuang, Zhou Zhicheng) introduces the typical mobile communication satellite transponder implementation architecture, and describes the digital processing flow including analog-to-digital conversion, digital branching, receiving DBF, return mapping, digital combining, analog-to-digital conversion, and onboard switching, but does not clearly introduce the interconnection relationship between the various functional modules and the detailed processing implementation solution.

[0006] Patent 2 "A hybrid transparent forwarding method" (Zhang Chunhui, Li Hui, Ren Guoxiang, etc.) discloses a hybrid transparent forwarding method, which adds an analog microwave matrix forwarding mode on the basis of the sub-band switching forwarding mode of the digital transparent repeater, and has the advantages of both traditional transparent repeaters and processing repeaters. It not only avoids the limitations of the physical layer signal system, but also supports flexible switching of fine-grained bandwidth, and improves support for high-reliability transmission applications; at the same time, it adopts digital processing and switching methods, and the beams between different ports and even the uplink and downlink beams within the same port can independently set the working mode and processing bandwidth to meet their respective task requirements and have flexible application methods.

[0007] Patent 3 "A multi-domain flexible communication flexible forwarding processing system" (Hui Tengfei, Zhai Shenghua, Sun Hanwen, etc.) provides a satellite-ground synchronization method, realizes dynamic channelized switching, supports different exchange relationships of each port sub-band at different times, and realizes dynamic and flexible forwarding combining time domain and frequency domain, further improving the utilization efficiency of frequency resources and networking flexibility.

[0008] Patent 4 "Systems And Methods For Digital Processing of Satellite Communications Data" (Douglas T. Bell, Brian A. Clebowicz) introduces that the digital processing payload for completing the sub-band spectrum processing of the uplink beam should include a digital channel analyzer, a digital switching matrix and a digital synthesizer, and the digital payload can optionally be configured with a regeneration module as an extension of the conventional digital payload to complete the modulation and demodulation processing of part or all of the spectrum, and explains the basic functional modules of the digital payload and the bandwidth and resource allocation process.

[0009] The above four prior art documents or patents introduce the composition of related methods or processing systems for digital transparent processing or flexible forwarding processing. For example, document 1 introduces the implementation architecture of a typical mobile communication satellite transponder, but does not clearly introduce the interconnection relationship between the functional modules and the detailed processing implementation scheme; document 2 introduces a mixed digital-analog processing system that can combine the advantages of traditional transparent transponders and processing transponders, and its application method is more flexible than that of traditional transparent transponders; document 3 mainly introduces a satellite-to-ground synchronization method, realizes dynamic channelized switching, and supports different switching relationships of sub-bands of each port at different times, but does not include a digital transparent forwarding processing method or implementation structure involving beam domain synthesis processing; document 4 introduces the composition of a digital processing payload that completes the sub-band spectrum processing of an uplink beam, and explains the basic functional modules of the digital payload and the bandwidth and resource allocation process, but does not involve a processing method or implementation architecture that includes a beam synthesis function. Summary of the invention

[0010] In view of the above problems, the purpose of the present invention is to provide a digital transparent processing implementation system and method for multi-domain flexible applications, so as to solve the problem that the prior art is limited by the processing implementation architecture, the number of data transmission nodes, the data transmission capacity of a single node, etc., and it is impossible to realize beamforming with the participation of the full feed array and fully flexible switching of full-beam, full-frequency sub-band-level beams.

[0011] To achieve the above object, the technical solution adopted by the present invention includes:

[0012] A digital transparent processing implementation system for multi-domain flexible applications, including a channel processing plane, a beam processing plane and a switching processing plane;

[0013] The channel processing plane includes M channel processing units corresponding to the M uplink ports and the M downlink ports, and each channel processing unit includes an uplink channel processing node and a downlink channel processing node;

[0014] The beam processing plane includes S beam processing units, each of which includes an uplink beam processing part and a downlink beam processing part; the uplink beam processing part includes M uplink port processing nodes, each of which is connected to M uplink channel processing nodes; each uplink beam processing part also includes R uplink beam processing nodes, each of which is connected to all uplink port processing nodes in the uplink beam processing part; the downlink beam processing part includes M downlink port processing nodes, each of which is connected to M downlink channel processing nodes; each downlink beam processing part also includes R downlink beam processing nodes, each of which is connected to all downlink port processing nodes in the uplink beam processing part;

[0015] The switching processing plane includes S' switching processing units, each switching processing unit includes K switching processing nodes, and each switching processing node is connected to all uplink beam processing nodes and all downlink beam processing nodes.

[0016] Preferably, S'×K>R×S.

[0017] Preferably, each uplink channel processing node includes an uplink channelization module and a receiving primary subband mapping module connected in series, and each downlink channel processing node includes a transmitting primary subband mapping module and a downlink channel synthesis module connected in series.

[0018] Preferably, any group of connected uplink port processing nodes and uplink beam processing nodes include a serially connected receiving first-level beam synthesis module and a serially connected receiving second-level sub-band mapping module, and any group of connected downlink beam processing nodes and downlink port processing nodes include a serially connected transmitting second-level sub-band mapping module and a transmitting third-level beam synthesis module.

[0019] Preferably, any group of connected uplink port processing nodes and uplink beam processing nodes include a receiving first-level beam synthesis module, a receiving second-level sub-band mapping module, a receiving second-level beam synthesis module and a receiving third-level sub-band mapping module connected in series, and any group of connected downlink beam processing nodes and downlink port processing nodes include a transmitting third-level sub-band mapping module, a transmitting second-level beam synthesis module, a transmitting second-level sub-band mapping module and a transmitting third-level beam synthesis module connected in series.

[0020] Preferably, each switching processing node is also connected to all uplink channel processing nodes and downlink channel processing nodes.

[0021] A digital transparent processing implementation method for multi-domain flexible applications adopts the digital transparent processing implementation system for multi-domain flexible applications disclosed in the present application.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) The digital transparent processing implementation system and method for multi-domain flexible applications of the present invention utilizes a three-level mapping function combined with broadband digital channel processing and large-scale sub-band switching to form an integrated multi-level and multi-dimensional processing method, which effectively meets the digital transparent processing forwarding requirements for multi-domain flexible applications with a large number of ports, large port bandwidth, and high processing capacity, and can realize system-level full-array beamforming and full-beam, full-frequency sub-band switching. It has good scalability and system reliability, and effectively breaks through the bottleneck of being unable to realize full-feed source beamforming and full-beam, full-frequency sub-band flexible switching functions due to multiple limitations such as conventional processing implementation framework, number of data transmission nodes, and single-node data transmission capacity.

[0024] (2) The present invention provides a digital transparent processing implementation system and method for multi-domain flexible applications. The channel processing plane and the beam processing plane are internally configured with multi-level independent mapping modules, so that the system has the ability to directly connect to the beam processing plane across the channel processing plane, adapt to the application of the analog beamforming network system architecture and the processing scenario for the feed link (no digital beam synthesis processing requirements); the two-level mapping module inside the beam processing plane enables the system to have good compatibility with the switching processing plane when the number of ports is small and no two-level digital beam synthesis processing requirements are required, so that the flexibility, adaptability and reliability of the system in response to the usage requirements of different application scenarios are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 Implement system architecture and processes for digital transparent processing for multi-domain flexible applications;

[0027] Figure 2 It is a block diagram of the functional modules of the channel processing unit in the present invention;

[0028] Figure 3 It is a schematic diagram of a sub-band mapping working mode 1 in the present invention;

[0029] Figure 4 This is a schematic diagram of the second subband mapping working mode in the present invention;

[0030] Figure 5 It is a working mode architecture block diagram of two system implementation architectures in the present invention;

[0031] Figure 6 This is a block diagram of the functional modules of the beam processing unit in the present invention;

[0032] Figure 7 A processing flow chart of the present invention without configuring secondary beamforming and tertiary mapping; DETAILED DESCRIPTION

[0033] The invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention. All components and devices in the present invention, unless otherwise specified, are all components and devices known in the prior art.

[0034] Example

[0035] A digital transparent processing implementation system for multi-domain flexible applications includes a channel processing plane, a beam processing plane and a switching processing plane.

[0036] Specifically, the channel processing plane includes M channel processing units corresponding to the M upstream ports and the M downstream ports, which respectively complete the digital channelization processing of the M upstream port signals and the channel synthesis processing of the M downstream port signals. Each channel processing unit includes an upstream channel processing node and a downstream channel processing node. Figure 2 Each uplink channel processing node disclosed in this embodiment includes an uplink channelization module and a receiving first-level sub-band mapping module connected in series, and each downlink channel processing node includes a transmitting first-level sub-band mapping module and a downlink channel synthesis module connected in series.

[0037] Among them, the total bandwidth of useful signals of each uplink port is B. After channelization processing by the uplink channel processing node, the useful signal occupies N sub-bands, and the bandwidth of each sub-band is B / N. The N sub-band data processed by each uplink channelization module are grouped and rearranged in the corresponding receiving first-level sub-band mapping module according to the configuration of the sub-band mapping table. The number of groups is set to S, and the number of sub-bands in each group is N / S.

[0038] The data of M×N subbands processed by the M channelized processing modules and M receiving mapping modules of all M ports are distributed to S subband switching modules for subband switching processing, wherein each subband switching module receives N / S subband data from a single channelized module and receives M×N / S subband data from M channelized processing modules. All subband data of each port are connected to the S beam / switch processing units of the beam processing / switch processing plane according to the frequency dimension, so for a system configured with M ports, it is connected to the processing units of other planes through S×M groups of links.

[0039] The mapping grouping disclosed in this embodiment has two working modes. One mapping working mode is a method of grouping in sequence according to frequency, that is, after the channelization process is completed, all N subbands are grouped in frequency order and divided into S groups in total. The number of subbands in each group is N / S, that is, the subbands of the first group are numbered 1, 2, ..., N / S, the subbands of the second group are numbered N / S+1, N / S+2..., 2N / S, and the subbands of the Sth group are numbered (S-1)N / S+1, (S-1)N / S+2, ..., N. The bandwidth of each group is S×B / N, such as Figure 3 The second mapping working mode is to select and rearrange the order of subbands according to the configuration of the receiving first-level mapping table, and finally ensure that the number of subbands in each group is N / S, and the subband numbering is implemented according to the mapping configuration table, such as Figure 4 .

[0040] Specifically, the beam processing plane includes S beam processing units, each of which includes an uplink beam processing part and a downlink beam processing part;

[0041] The uplink beam processing part of this embodiment includes M uplink port processing nodes, each of which is connected to M uplink channel processing nodes; each uplink beam processing part also includes R uplink beam processing nodes, each of which is connected to all uplink port processing nodes in the uplink beam processing part;

[0042] The downlink beam processing part includes M downlink port processing nodes, each of which is connected to M downlink channel processing nodes; each downlink beam processing part also includes R downlink beam processing nodes, each of which is connected to all downlink port processing nodes in the uplink beam processing part.

[0043] Specifically, the switching processing plane includes S' switching processing units, each switching processing unit includes K switching processing nodes, and each switching processing node is connected to all uplink beam processing nodes and all downlink beam processing nodes.

[0044] The system disclosed in this embodiment needs to meet the full switching capacity, and the number S' of configured switching processing units and the number K of switching processing nodes in each switching processing unit both satisfy S'×K>R×S.

[0045] Any group of connected uplink port processing nodes and uplink beam processing nodes disclosed in this embodiment include a receiving first-level beam synthesis module and a receiving second-level sub-band mapping module connected in series, and any group of connected downlink beam processing nodes and downlink port processing nodes include a transmitting second-level sub-band mapping module and a transmitting third-level beam synthesis module connected in series. Or any group of connected uplink port processing nodes and uplink beam processing nodes disclosed in this embodiment include a receiving first-level beam synthesis module, a receiving second-level sub-band mapping module, a receiving second-level beam synthesis module, and a receiving third-level sub-band mapping module connected in series, and any group of connected downlink beam processing nodes and downlink port processing nodes include a transmitting third-level sub-band mapping module, a transmitting second-level beam synthesis module, a transmitting second-level sub-band mapping module, and a transmitting third-level beam synthesis module connected in series.

[0046] A receiving secondary sub-band mapping module is configured after the receiving primary beam synthesis module of each beam processing unit. The working mode of the receiving secondary sub-band mapping module is similar to that of the primary receiving sub-band mapping. The N sub-band beams processed by each receiving primary beam synthesis module are grouped and rearranged in the corresponding mapping module according to the configuration of the receiving secondary sub-band mapping table. The processing methods of the secondary and tertiary sub-band mapping are the same as those of the primary sub-band mapping, and are all implemented through different mapping table configurations.

[0047] Receiving primary, secondary and tertiary sub-band mapping is an integral part of the system switching and an important link between the channelization module and the switching module. It is the key to realizing the flexible switching of any sub-band of any uplink input port / input beam of the system to any downlink and any sub-band of any switching input port / input beam.

[0048] When sub-band grouping and rearrangement are performed in the receiving three-level mapping module, in response to different sub-band exchange needs such as on-demand, multicast and broadcast, the sub-band is output to any exchange processing unit according to the destination sub-band number of the current sub-band to be exchanged, and the sub-band exchange function is completed in the exchange processing plane.

[0049] In this embodiment, the subarray port scale is set to T. When the number of uplink and downlink ports of the channel does not exceed the upper limit of the port scale of a single beam processing unit, that is, M≤T, it is not necessary to go through the secondary beamforming and tertiary subband mapping processing; if it exceeds the upper limit of the port scale processing, that is, M>T, it is necessary to go through the secondary beamforming and tertiary subband mapping processing, wherein the secondary beamforming mainly completes the beamforming of different subarrays, and the number of beam signals output by the secondary beamforming is R, the bandwidth is B, and the number of subbands is N / S'.

[0050] Any switching processing unit needs to process the switching of all R beam ports and R×N / S' subbands of each port. A single switching processing plane can realize both time slot switching within the same beam port and space switching between different beam ports.

[0051] Any switching processing unit in the switching processing plane runs completely independently and in parallel, and the planes are completely replaceable with each other. When the processing capacity of the switching processing unit reaches the upper limit of the processing capacity, or any transmission path or switching processing unit has an abnormality, the system switching requirements can still be met by replacing it with other units.

[0052] Example 2

[0053] Each switching processing node disclosed in this embodiment is also connected to all uplink channel processing nodes and downlink channel processing nodes. That is, the channel processing plane can be connected to the beam processing plane, or it can be directly connected to the switching processing plane across the beam processing plane. When the channel processing plane is connected to the beam processing plane, the receiving first-level subband mapping module works in mode 1; when the channel processing plane is connected to the switching processing plane, the receiving first-level subband mapping module works in mode 2. The working states of the two modes are realized by configuring different mapping working mode parameters, such as Figure 5 .

[0054] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations. In addition, the various different embodiments disclosed in this solution can also be combined arbitrarily, as long as they do not violate the ideas of this disclosure, they should also be regarded as the contents invented by this disclosure.

Claims

1. A digital transparent processing implementation system for multi-domain flexible applications, characterized in that: It includes a channel processing plane, a beam processing plane and a switching processing plane; The channel processing plane includes M channel processing units corresponding to the M uplink ports and the M downlink ports, and each channel processing unit includes an uplink channel processing node and a downlink channel processing node; The beam processing plane includes S beam processing units, each of which includes an uplink beam processing part and a downlink beam processing part; The uplink beam processing part includes M uplink port processing nodes, each of which is connected to M uplink channel processing nodes; each uplink beam processing part also includes R uplink beam processing nodes, each of which is connected to all uplink port processing nodes in the uplink beam processing part; The downlink beam processing part includes M downlink port processing nodes, each of which is connected to M downlink channel processing nodes; each downlink beam processing part also includes R downlink beam processing nodes, each of which is connected to all downlink port processing nodes in the uplink beam processing part; The switching processing plane includes S' switching processing units, each switching processing unit includes K switching processing nodes, and each switching processing node is connected to all uplink beam processing nodes and all downlink beam processing nodes.

2. The digital transparent processing implementation system for multi-domain flexible applications as claimed in claim 1, characterized in that: S'×K>R×S.

3. The digital transparent processing implementation system for multi-domain flexible applications as claimed in claim 2, characterized in that: Each uplink channel processing node includes an uplink channelization module and a receiving primary subband mapping module connected in series, and each downlink channel processing node includes a transmitting primary subband mapping module and a downlink channel synthesis module connected in series.

4. The digital transparent processing implementation system for multi-domain flexible applications as claimed in claim 2, characterized in that: Any group of connected uplink port processing nodes and uplink beam processing nodes includes a serially connected receiving first-level beam synthesis module and a serially connected receiving second-level sub-band mapping module, and any group of connected downlink beam processing nodes and downlink port processing nodes includes a serially connected transmitting second-level sub-band mapping module and a serially connected transmitting third-level beam synthesis module.

5. The digital transparent processing implementation system for multi-domain flexible applications as claimed in claim 2, characterized in that: Any group of connected uplink port processing nodes and uplink beam processing nodes includes a serially connected receiving first-level beam synthesis module, a receiving second-level sub-band mapping module, a receiving second-level beam synthesis module and a receiving third-level sub-band mapping module, and any group of connected downlink beam processing nodes and downlink port processing nodes includes a serially connected transmitting third-level sub-band mapping module, a transmitting second-level beam synthesis module, a transmitting second-level sub-band mapping module and a transmitting third-level beam synthesis module.

6. The digital transparent processing implementation system for multi-domain flexible applications according to any one of claims 1 to 5, characterized in that: Each switching processing node is also connected to all uplink channel processing nodes and downlink channel processing nodes.

7. A digital transparent processing implementation method for multi-domain flexible applications, characterized in that: A digital transparent processing system for multi-domain flexible applications as described in any one of claims 1 to 5 is adopted.

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