CN102427380B - Mobile satellite communication ground station system - Google Patents
Mobile satellite communication ground station system Download PDFInfo
- Publication number
- CN102427380B CN102427380B CN201110208247.9A CN201110208247A CN102427380B CN 102427380 B CN102427380 B CN 102427380B CN 201110208247 A CN201110208247 A CN 201110208247A CN 102427380 B CN102427380 B CN 102427380B
- Authority
- CN
- China
- Prior art keywords
- module
- sbss
- satellite
- station system
- user
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a mobile satellite communication ground station system which adopts a high ATCA (Advanced Telecom Computing Architecture) platform architecture and comprises at least one satellite base station system SBSS (Space Based Space Surveillance) and one GPRS (General Packet Radio Service) supporting node GSN (Gateway Service for Network); a local network is formed between the satellite base station system SBSS and the GPRS supporting node GSN form through wired connection; the satellite base station system SBSS and communication satellites are connected through a feeding link; the satellite base station system SBSS is responsible for processing the access of satellite user terminals in the local network; and the GPRS supporting node GSN is responsible for processing communication in a local mobile satellite communication network and communication between the local network and an external network. According to the invention, based on the ATCA architecture, the mobile satellite communication ground station system obtains the advantages of high capacity, high reliability, good expansibility, greater single board processing capability, higher interconnection bandwidth among boards, stable and reliable power supply and heat radiation, uniform and reliable system management, etc.
Description
Technical field
The present invention relates to Mobile satellite communication ground station system, particularly a kind of Mobile satellite communication ground station system based on ATCA (AdvancedTelecommunication Computer Architecture, advanced telecom computer architecture framework) hardware platform.
Background technology
Utilize geostationary orbit satellite or in, low-orbit satellite is as relay station, the mobile communication of feasible region and even global range is called satellite mobile communication.Satellite mobile communication system for global user provide large span, on a large scale, roaming and motor-driven, Mobile Communication Service flexibly at a distance, expansion and the extension of land cellular mobile communications system, in remote area, mountain area, island, be subject to disaster area, ocean-going vessel to only reach the communication aspects such as oceangoing voyage aircraft to have more unique superiority.Satellite mobile communication has become an important development direction of communication service.
Satellite mobile communication system (as shown in Figure 1) is made up of space segment 1, application section 2 and ground segment 3 three parts.Space segment 1, i.e. communication satellite, utilizes the transponder carrying on satellite to realize the forwarding of signal between user and user, user and ground satellite station, realizes user link and the forwarding that is fed to signal in link.Application section 2, i.e. user terminal 5, by discernible information (voice, data, short message etc.) be processed into can be in space wireless signal transmission, that meet system requirements, and to satellite launch; Meanwhile, the spacing wireless signal reception & disposal that meets system requirements satellite launch (forwarding) being come becomes discernible information (voice, data, short message).Ground segment 3 is realized wireless receiving and dispatching telecommunication function, comprises radio frequency processing, channel decoding and multiplexing and demultiplexing, band spectrum modulation and despread-and-demodulation etc.; Realize the functions such as management, systems network administration and monitoring of tools, the satellite mobile subscriber's of Radio Resource and ground resource authentication, encryption, certification, charging; And exchange and the transmission of the processing of user data, user data, and the connection communication of realization and external network.
Wherein in ground segment 3, a most important part is Mobile satellite communication ground station system, the Mobile satellite communication ground station system framework of standard as shown in fig. 1, is made up of satellite base station system SBSS (SatelliteBase Station System) 6, GPRS serving GPRS support node SGSN (Serving GPRS Support Node) 7 and 8 three network elements of gateway GPRS support node GGSN (Gateway GPRS Support Node).
The function that satellite base station system SBSS 6 realizes comprises satellite mobile subscriber's RRM, mobile management and wireless receiving and dispatching telecommunication function, comprises radio frequency processing, channel decoding and multiplexing and demultiplexing, band spectrum modulation and despread-and-demodulation etc.
GPRS serving GPRS support node SGSN 7 and gateway GPRS support node GGSN 8 are collectively referred to as GPRS support node GGSN (GPRS Support Node) 9 conventionally.GPRS serving GPRS support node SGSN 7 mainly completes the functions such as routing forwarding, mobile management, session management, Logical Link Management, authentication and encryption, ticket generation and the output of satellite mobile subscriber packet data package; Gateway GPRS support node GGSN 8 has been mainly gateway effect, connects (including but not limited to networks such as integrated services digital network ISDN (Integrated Services Digital Network), the PSPDN of PSPDN Packet Switched Public Data Network (Packet Switched Public Data Network) and local area network (LAN) LAN (Local Area Network)) from multiple different ground communication network 10; Satellite mobile subscriber's packet data package is carried out to protocol conversion and be sent to the network of far-end, realize connection communication.
Satellite mobile user data transmits between user terminal 5 and satellite base station system SBSS 6 and the network equipment of GPRS support node GGSN 9 by Traffic Channel.If the intercommunication of the ICBM SHF satellite terminal in satellite mobile communication system 5, user data is forwarded by satellite base station system SBSS 6; If ICBM SHF satellite terminal 5 is with net when outer telex network, user data experiences single-hop satellite link, satellite base station system SBSS 6, GPRS support node GGSN 9 network equipments and external network and connects.
Along with improving constantly of the development and application demand of satellite mobile communication technology, hardware platform architectural framework and software architecture are processed the aspects such as density, veneer area, power consumption, handling capacity, reliability, extensibility, system management, system processing power and have all been proposed more and more higher requirement at veneer.Although the hardware platform architectural framework that existing Mobile satellite communication ground station system adopts and software architecture have carried out some expansion effort, but still be difficult to meet the demand pressure day by day strengthening.In addition, as general extendible platform system-ATCA hardware platform system with multiple excellent properties of extensively being supported in the industries such as telecommunications, current Mobile satellite communication ground station system does not all also adopt.
Summary of the invention
The present invention is directed to deficiency and problem that current Mobile satellite communication ground station system recited above exists, the present invention adopts and realizes Mobile satellite communication ground station system based on advanced telecom computer architecture architecture platform.
One aspect of the present invention, provides a kind of satellite base station system, and described satellite base station system comprises radio frequency unit and digital hardware cell mesh, and radio frequency unit and digital hardware unit adopt respectively dissimilar machine frame; Described radio frequency unit adopts the radio frequency rack of non-ATCA platform, and described digital hardware unit assigns into ATCA rack with the form of ATCA veneer.
According to embodiments of the invention, described satellite base station system is for Mobile satellite communication ground station system, and described Mobile satellite communication ground station system adopts high ATCA platform system structure; This system comprises at least one satellite base station system SBSS and a GPRS support node GSN; Between described satellite base station system SBSS and GPRS support node GSN, form local network by wired connection; Described satellite base station system SBSS is connected by feeding link with communication satellite; Described satellite base station system SBSS is responsible for processing the access of satellite user terminal in local network; Described GPRS support node GSN is responsible for processing communicating by letter between communication in local satellite mobile communication network and local network and external network.
According to embodiments of the invention, described digital hardware cell mesh comprises a rack of at least one composition of the machine frame based on ATCA platform, and can increase at least one expansion rack again.
According to embodiments of the invention, described digital hardware cell mesh comprises at least one ethernet switching module GES, has the form of ATCA veneer of inserting machine frame, realize in equipment between veneer exchange without management ethernet.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more baseband processing module BB, there is the form of the ATCA veneer that inserts machine frame, complete the function of Channel Processing: realize rate adapted, channel code and interleaving, encryption at down direction; Realize digital demodulation at up direction, decipher, deinterleave, channel-decoding and rate adaptation function.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more radio frequency interface module RFI, has the form of the ATCA veneer that inserts machine frame, the signal of coming in received RF unit, convert inner baseband signal stream format to, be sent to baseband processing module BB by switching network; Conversion baseband digital signal is also sent to corresponding radio frequency unit.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more interface and clock module IFB/CLK, the form with the ATCA veneer that inserts machine frame, provides and GPRS serving GPRS support node SGSN and the IP connecting interface of gateway GPRS support node GGSN and extraction and the distribution of clock signal.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more chain of command main control module CCM, there is the form of ATCA veneer of inserting machine frame, realize load balancing, management of public resources and the internal communication function with other applied function module.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more chain of command user terminal functional module MSM, has the form of the ATCA veneer that inserts machine frame, realizes the function that user terminal is relevant with Bearer Control; Described digital hardware cell mesh comprises one or more chain of command wave beam community functional module SBM, has the form of the ATCA veneer that inserts machine frame, realizes the function relevant to wave beam community; Described digital hardware cell mesh comprises one or more user's face common process module URMM, has the form of the ATCA veneer that inserts machine frame, realizes the resource management function of user's face.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more user's face user terminal processes module UMSM, has the form of the ATCA veneer that inserts machine frame, realizes the user plane protocol processing capacity relevant to user terminal; Described digital hardware cell mesh comprises one or more user's ground roll Shu little Qu processing module USBM, has the form of the ATCA veneer that inserts machine frame, realizes the user plane protocol processing capacity relevant to wave beam community.
Another aspect of the present invention, provides a kind of Mobile satellite communication ground station system, and described Mobile satellite communication ground station system adopts high ATCA platform system structure; This system comprises at least one satellite base station system SBSS and a GPRS support node GSN; Between described satellite base station system SBSS and GPRS support node GSN, form local network by wired connection; Described satellite base station system SBSS is connected by feeding link with communication satellite; Described satellite base station system SBSS is responsible for processing the access of satellite user terminal in local network; Described GPRS support node GSN is responsible for processing communicating by letter between communication in local satellite mobile communication network and local network and external network.
According to embodiments of the invention, described satellite base station system SBSS comprises radio frequency unit and digital hardware unit, and described radio frequency unit separates with digital hardware unit, and connects by wire transmission circuit.
According to embodiments of the invention, described digital hardware unit has the form of the ATCA veneer that inserts machine frame, realizes functions such as controlling exchange, external interface, Base-Band Processing, Signalling exchange, user data processing on ATCA platform.
According to embodiments of the invention, described radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, completes the power amplification of modulation /demodulation between transmission reception, baseband signal and the carrier signal of control processing, wireless channel data of wireless channel in satellite base station system SBSS and Up/Down Conversion, wireless carrier and sends receiving function.
According to embodiments of the invention, described GPRS support node GSN comprises digital hardware unit, this unit, digital hardware unit has the form of the ATCA veneer that inserts machine frame, realizes functions such as controlling exchange, load balancing, calling party data management, accounting management, tracking, Lawful intercept management, external interface, Signalling exchange, user data processing on ATCA platform.
According to embodiments of the invention, all network elements of described Mobile satellite communication ground station system have identical software architecture.
According to embodiments of the invention, described software architecture comprises that operating system OS, middleware MW, chain of command are processed CPP, user's face is processed UPP and Operation and Maintenance OMP; Described operating system OS is real time operating system, as the operating system of whole system.
According to embodiments of the invention, described middleware MW is the software public module based on operating system OS, for upper layer software (applications) provides general basic function; State chain of command processing CPP and realize chain of command signaling processing correlation function; User's face is processed UPP and is realized user face data processing correlation function; Operation and Maintenance OMP (Operating and Maintenance Processing): realize foregrounding and safeguard correlation function.
According to embodiments of the invention, described operating system OS and middleware MW form software common platform, for upper application software module provides general basic function; Described chain of command is processed CPP, user's face and is processed UPP and Operation and Maintenance to process OMP be the application software module on software common platform, completes specific application processing by the unified interface of calling software common platform and providing.
The present invention is based on the architectural framework of ATCA, make Mobile satellite communication ground station system can obtain large capacity, high reliability, the good benefit of the aspects such as interconnect bandwidth between autgmentability, larger veneer disposal ability, higher plate, reliable and stable power supply, heat radiation and unified reliable system management.
Another aspect of the present invention, provides a kind of Mobile satellite communication ground station system, and described Mobile satellite communication ground station system adopts high ATCA platform system structure; This system comprises satellite base station system SBSS, GPRS serving GPRS support node SGSN and tri-network element subsystems of gateway GPRS support node GGSN form; Described satellite base station system SBSS is divided into again radio frequency unit module and digital hardware unit module two parts; Described radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, and digital hardware unit, GPRS serving GPRS support node SGSN and the gateway GPRS support node GGSN of satellite base station system SBSS is placed on separately independently in ATCA rack.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises a rack of one or more composition of machine frame based on ATCA platform, and can increase one or more expansion rack again.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises at least one ethernet switching module GES, has the form of ATCA veneer of inserting machine frame, realize in equipment between veneer exchange without management ethernet.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more interface and clock module IFB/CLK, there is the form of ATCA veneer of inserting machine frame, the IP connecting interface of equipment and extraction and the distribution of clock signal with satellite base station system SBSS and gateway GPRS support node GGSN etc. is provided.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more chain of command processing module GCPM, has the form of the ATCA veneer that inserts machine frame, realizes Central Control Function.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more user's face processing module GUPM, has the form of the ATCA veneer that inserts machine frame, realizes the processing capacity of user plane protocol.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises that gateway GPRS support node GGSN comprises: a rack of one or more composition of machine frame based on ATCA platform, and can increase again one or more expansion rack.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises at least one ethernet switching module GES, has the form of ATCA veneer of inserting machine frame, realize in equipment between veneer exchange without management ethernet.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more interface and clock module IFB/CLK, there is the form of ATCA veneer of inserting machine frame, provide with satellite base station system SBSS, GPRS serving GPRS support node SGSN and with the IP connecting interface of outside network device and extraction and the distribution of clock signal.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more user's face main control module GMCM, has the form of the ATCA veneer that inserts machine frame, realizes user's face Central Control Function; Described GPRS serving GPRS support node SGSN comprises one or more user's face processing module GUPM, has the form of the ATCA veneer that inserts machine frame, realizes the processing capacity of user plane protocol.
The architectural framework of satellite base station system of the present invention based on ATCA, makes Mobile satellite communication ground station system can obtain large capacity, high reliability, the good benefit of the aspects such as interconnect bandwidth between autgmentability, larger veneer disposal ability, higher plate, reliable and stable power supply, heat radiation and unified reliable system management.
Another aspect of the present invention, provides a kind of Mobile satellite communication ground station system, and described Mobile satellite communication ground station system adopts high ATCA platform system structure; This system comprises satellite base station system SBSS, GPRS serving GPRS support node SGSN and tri-network element subsystems of gateway GPRS support node GGSN form; Described GPRS serving GPRS support node SGSN and gateway GPRS support node GGSN are combined into GPRS support node GSN; Between described satellite base station system SBSS and GPRS support node GSN, form local network by wired connection; Described satellite base station system SBSS is connected by feeding link with communication satellite; Described satellite base station system SBSS is responsible for processing the access of satellite user terminal in local network; Described GPRS support node GSN is responsible for processing communicating by letter between communication in local satellite mobile communication network and local network and external network;
Described satellite base station system SBSS is divided into again radio frequency unit module and digital hardware unit module two parts; Described radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, and digital hardware unit, GPRS serving GPRS support node SGSN and the gateway GPRS support node GGSN of satellite base station system SBSS is placed on separately independently in ATCA rack.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises at least one ethernet switching module GES, has the form of ATCA veneer of inserting machine frame, realize in equipment between veneer exchange without management ethernet; Described ethernet switching module GES adopts master-slave redundancy scheme or load sharing mode.
According to embodiments of the invention, described GPRS serving GPRS support node SGSN comprises one or more interface and clock module IFB/CLK, there is the form of ATCA veneer of inserting machine frame, the IP connecting interface of equipment and extraction and the distribution of clock signal with satellite base station system SBSS and gateway GPRS support node GGSN etc. is provided; Described interface and clock module IFB/CLK can adopt the main backup scenario of 1+1, between every a pair of IFB/CLK, have standby usage.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more baseband processing module BB, there is the form of the ATCA veneer that inserts machine frame, complete the function of Channel Processing: realize rate adapted, channel code and interleaving, encryption at down direction; Realize digital demodulation at up direction, decipher, deinterleave, channel-decoding and rate adaptation function; Described baseband processing module BB adopts N+1, N+M or N:M backup scenario.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more radio frequency interface module RFI, has the form of the ATCA veneer that inserts machine frame, the signal of coming in received RF unit, convert inner baseband signal stream format to, be sent to baseband processing module BB by switching network; Conversion baseband digital signal is also sent to corresponding radio frequency unit; Described 1+1, N+1 for radio frequency interface module RFI, N+M, N:M backup or cold standby scheme.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more chain of command main control module CCM, there is the form of ATCA veneer of inserting machine frame, realize load balancing, management of public resources and the internal communication function with other applied function module;
Described GPRS serving GPRS support node SGSN comprises one or more chain of command processing module GCPM, has the form of the ATCA veneer that inserts machine frame, realizes Central Control Function;
Described GPRS serving GPRS support node SGSN comprises one or more user's face main control module GMCM, has the form of the ATCA veneer that inserts machine frame, realizes user's face Central Control Function;
Described chain of command main control module CCM, chain of command processing module GCPM and user's face main control module GMCM adopt the main backup scenario of 1+1.
According to embodiments of the invention, described digital hardware cell mesh comprises one or more user's face common process module URMM, has the form of the ATCA veneer that inserts machine frame, realizes the resource management function of user's face;
Described digital hardware cell mesh comprises one or more user's face user terminal processes module UMSM, has the form of the ATCA veneer that inserts machine frame, realizes the user plane protocol processing capacity relevant to user terminal;
Described GPRS serving GPRS support node SGSN comprises one or more user's face processing module GUPM, has the form of the ATCA veneer that inserts machine frame, realizes the processing capacity of user plane protocol;
Described digital hardware cell mesh comprises one or more user's ground roll Shu little Qu processing module USBM, has the form of the ATCA veneer that inserts machine frame, realizes the user plane protocol processing capacity relevant to wave beam community;
Described user's face common process module URMM, user's face user terminal processes module UMSM, user's ground roll Shu little Qu processing module USBM and user's face processing module GUPM adopt N+1, N+M or N:M backup scenario.
Owing to adopting switching network interconnection, rack and expansion rack room also can back up mutually, and particularly, in the time that GES place rack lost efficacy, the GES module of other rack can be taken over by certain mechanism the work of inefficacy rack.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 shows satellite mobile communication network and Mobile satellite communication ground station system schematic diagram;
Fig. 2 shows ATCA machine frame bottom management schematic diagram;
Fig. 3 shows ATCA backboard and module interconnects schematic diagram;
Fig. 4 is the SBSS+SGSN+GGSN configuration schematic diagram of embodiment one;
Fig. 5 is satellite base station system SBSS user face application software module schematic diagram;
Fig. 6 is the SBSS+GSN configuration schematic diagram of embodiment two;
Fig. 7 is the earth station system All-In-One configuration schematic diagram of embodiment three;
Fig. 8 is software architecture schematic diagram.
Embodiment
Disclosed all features in this specification, or step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
ATCA is PICMG (PCI Industrial Computer Manufacturer ' s Group, International Industry Technological Problems In Computer Manufacturing person federation) start the advanced person's of a new generation the telecom computer architecture framework of formulating, be a high performance-price ratio providing for converged communication of future generation and data network application, based on modular construction, compatible, and extendible hardware structure.
ATCA machine frame bottom management schematic diagram as shown in Figure 2, core specification PICMG3.0 in ATCA specification family has defined mechanical structure, power supply, heat radiation, interconnected, the system management part of ATCA architecture, and some other auxiliary specification has defined transmission means interconnected in core specification.
Aspect board dimension, ATCA specification is header board 8U (height) x280mm (deeply), rear plate 8Ux70mm.Groove column pitch is 1.2 ", 19 " machine frame can be supported 14 grooves, and the machine frame of 600mm ETSI can be supported 16 grooves.With respect to the board dimension and 0.8 of CPCI 6Ux160mm " groove column pitch, the circuit number that ATCA veneer can hold, the components and parts height of support, the aspects such as the power consumption that veneer can hold have all improved greatly, wider panel has also been strengthened the support to connector.
Aspect power supply, every ATCA veneer receive two-way independently-48VDC power supply directly powers, power supply reliability and power supply capacity have all improved.Power supply on every veneer is divided into management power supply and load supplying two parts.Management output power is less, aim at the intelligent platform management controller IPMC for platform management on plate (Intelligent Platform Management Controller) 13 power supplies, under the control of this controller, on board supply module can or be cut off load supplying to other load supplying.
Machine frame management (the Shelf Management) the 12nd of ATCA, the serial management bus based on Intelligent Platform Management Bus IPMB (Intelligent Platform Management Bus) 14, IPMC on each veneer have two each other the independently IPMB bus (be called IPMB-A, another is called IMPB-B) of standby usage be connected with Shelf Management Controller (ShMC) 12.It can be bus-type that veneer is connected with the management between Shelf Management Controller part, can be also star-like.The physical layer of IPMB is exactly very succinct I2C (Inter-Integrated Circuit) serial signal line, and the redundancy of System Management Bus has strengthened the reliability of management channels more.
Aspect veneer interconnection (ATCA backboard shown in Figure 3 and module interconnects schematic diagram), ATCA has defined clock synchronous bus 15, Update passage (UpdateChannel) 16, Base interface (Base Interface) 17, Fabric interface (FabricInterface) 18 successively according to backboard order from top to bottom, and bottom is power supply and management channels 19.
Update passage 16 for needing each other very at a high speed, the data of large throughput directly transmit or very real-time mutual veneer between direct connection, the connection of Update passage 16 on backboard is very flexibly.
Base interface 17 is topological structures of a dual star topology (Dual Star), and link is 10/100/1000Base-T, and the central authorities of star are the switching boards of redundancy.
Fabric interface 18 is for the high speed data transfer between veneer, and Fabric interface 18 is based on up to 3.125Gbps SERDES signal, can in star-like and full mesh interconnected, support the transmission rate of 10Gb.Fabric interface 18 can be supported multiple transmission specification, and in the time adopting star topology, the central authorities of star are also the switching boards of redundancy.Arrange plate position in Fig. 3 and line is schematically, and in fact Fabric network can be supported double star, the multiple topology such as totally interconnected, and the arrangement of groove position comprises that the groove position arrangement of power board position is also flexibly.
Transfer of data between the plate of ATCA platform and between veneer and power board all adopts the high-speed-differential link technology of point-to-point, and the reliability that has improved interconnection has also improved the handling capacity of hardware platform greatly.
At present, ATCA hardware platform architectural framework has obtained the support of many main flow software and hardwares manufacturer, becomes the communication apparatus platform architecture standard of the industry extensive uses such as telecommunications.Employing ATCA architectural framework also can bring and reduce costs, shorten the construction cycle, easily obtains many benefits such as support.Simultaneously, we can see that the network equipment of equipment and the land mobile communication system etc. of the Mobile satellite communication ground station system with large capacity, highly reliable demand has great similitude, go for too Mobile satellite communication ground station system so be applicable to the ATCA platform of land mobile communication system.
The Mobile satellite communication ground station system based on ATCA hardware platform architectural framework that the present invention proposes, all network element subsystems are followed identical architectural framework, and the satellite mobile communication standard (including but not limited to as time division multiple access access TDMA (Time Division Multiple Access), code division multiple access access CDMA (Code Division Multiple Access), frequency division multiple access access FDMA (FrequencyDivision Multiple Access) etc.) that therefore adopted is irrelevant.
The architectural framework that the present invention proposes is not limited to be applied to the system architecture based on GMR-13G standard that the ETSI of ETSI proposes, and the Mobile satellite communication ground station system of other standard and standard can adopt the hardware and software platform architectural framework that the present invention proposes to realize.Meanwhile, the embodiment of the execution mode of Mobile satellite communication ground station system shown in including but not limited to below.
One embodiment of the present of invention as shown in Figure 4, Mobile satellite communication ground station system is made up of satellite base station system SBSS, GPRS serving GPRS support node SGSN and tri-network element subsystems of gateway GPRS support node GGSN, and wherein GPRS serving GPRS support node SGSN and gateway GPRS support node GGSN are collectively referred to as GPRS support node GSN conventionally.
Between satellite base station system SBSS and GPRS support node GSN by wired connection (including but not limited to as Ethernet etc.) form local network.Satellite base station system SBSS is connected by feeding link with communication satellite.Satellite base station system SBSS is responsible for processing the access of satellite user terminal in local network; GPRS support node GSN is responsible for processing communicating by letter between communication in local satellite mobile communication network and local network and external network.
In satellite base station system SBSS, digital hardware unit 21 separates with radio frequency unit 20, and connects by wire transmission circuit (including but not limited to as optical fiber etc.).Digital hardware unit 21 has the form of the ATCA veneer that inserts machine frame, realizes functions such as controlling exchange, external interface, Base-Band Processing, Signalling exchange, user data processing on ATCA platform; Radio frequency unit 20 adopts the independent radio frequency rack of non-ATCA platform, completes the power amplification of modulation /demodulation between transmission reception, baseband signal and the carrier signal of control processing, wireless channel data of wireless channel in satellite base station system SBSS and Up/Down Conversion, wireless carrier and sends the functions such as reception.
Satellite base station system SBSS comprises radio frequency unit and digital hardware unit.Wherein radio frequency unit is made up of RF front-end module FEB (Front End Board), receipts calling module TRB (TRansceiver Board) and power amplifier PA (Power Amplifier), is placed in the independent radio frequency machine frame of non-ATCA platform.According to the difference of application scenarios, as indoor/outdoor, watt level etc., can be designed to the RF unit equipment of different specification size.
Digital hardware unit is by baseband processing module BB (BaseBand), radio frequency interface module RFI (RadioFrequency Interface), interface and clock module IFB/CLK (InterFace Board & & CLocK), ethernet switching module GES (Giga Ethernet Switching), SBSS chain of command main control module CCM (Central Control Module), SBSS chain of command user terminal functional module MSM (Mobileearth Station Module), SBSS chain of command wave beam community functional module SBM (Spot BeamModule), SBSS user's face common process module URMM (U-plane Resource ManagementModule), SBSS user's face user terminal processes module UMSM (U-plane Mobile earth StationModule) and SBSS user's ground roll Shu little Qu processing module USBM (U-plane Spot Beam Module) form, assign in ATCA rack with the form of ATCA veneer.Except ethernet switching module GES takies fixing groove position 7 and 8, the quantity of other module can be according to system configuration and capacity requirement flexible configuration.
Baseband processing module BB: the function that completes Channel Processing.Realize rate adapted, channel code and interleaving, encryption at down direction; Realize digital demodulation at up direction, decipher, deinterleave, channel-decoding and rate adaptation function.
Radio frequency interface module RFI: the signal of coming in received RF unit, convert inner baseband signal stream format to, be sent to baseband processing module BB by switching network; Conversion baseband digital signal is also sent to corresponding radio frequency unit.
Interface and clock module IFB/CLK: provide and the connecting interface of GPRS support node GSN and extraction and the distribution of clock signal.
Ethernet exchanging plate GES: realize in equipment between veneer exchange without management ethernet.
SBSS chain of command main control module CCM, the chain of command application software CCM moving on it realizes load-balancing function: (1) comprises the calling that processing is relevant to overall flow process, and call out the related procedure of initiating, different satellite user terminals is called out to balanced being assigned on different user terminal functional module MSM; (2) process paging, flow process and the function of all centralized control or management of public resources such as start, restart; (3) with the internal communication function of other applied function module.
SBSS chain of command user terminal functional module MSM, the chain of command application software MSM moving on it realizes following function: the whole call flow relevant to satellite user terminal and Bearer Control; Process the related signaling flow process of satellite user Dedicated Control Channel; Realize RRM RRM (Radio ResourceManagement) algorithm; The RRM relevant to satellite user terminal; User's face resource that foundation/call release is relevant; Internal communication function with other applied function module.
SBSS chain of command wave beam community functional module SBM: the chain of command application software SBM moving on it realizes the function relevant to wave beam community, comprising: the load balancing of Radio Resource; Process the related signaling flow process of wave beam community Common Control Channel; Part RRM RRM algorithm; The RRM relevant to wave beam community.
SBSS user's face common process module URMM (as shown in Figure 5), the context that URMM leading subscriber face is all and resource, the message of coming from chain of command ends in this, the user's face application software URMM moving on it realizes the resource management of user's face, comprise message distribution functional block MDM (Message Distribute Module) 30, paging distribution function piece PDM (Paging Distribute Module) 31, satellite user terminal resource management module MSRM 32 (it comprises satellite user terminal resource management 33 and satellite user terminal context management 34), wave beam local resource administration module SBRM (Spot Beam Resource Management) 35 (it comprises the management 36 of wave beam local resource and wave beam community context management 37).
Message distribution functional block MDM (Message Distribute Module) 30, this module is one of main control part of user's face processing, is used for and the interacting message of chain of command application module.MDM receives the initial resource application of the satellite user terminal of chain of command application module, and is distributed to different MSRM (Mobile earthStation Resource Management).
Paging distribution function piece PDM (Paging Distribute Module) 31, this module is one of main control part of user's face processing, is used for and the interacting message of chain of command application.MDM receives the paging request of chain of command application module, resolves and selects the wave beam community that paging request need to arrive and be distributed to different SBRM (Spot Beam Resource Management).
Satellite user terminal resource management module MSRM 32, MSRM is made up of a satellite user terminal resource management entity and multiple satellite user terminal context management entity.From module distribution, MSRM can expand and be distributed on multiple veneers.
Satellite user terminal resource management module MSRM 32 comprises satellite user terminal resource management 33 and satellite user terminal context management 34.Satellite user terminal resource management 33.Each UMSM module has a satellite user terminal resource management entity, user's face resource situation of this entity record UMSM module.User's face resource behaviour in service is periodically published to satellite user terminal resource management entity all in system by UMSM module.This entity is received from the resource request message of satellite user terminal context management entity, selects the UMSM module of allowable resource.Satellite user terminal context management 34, the relevant RRC message of satellite user terminal context management entity handles chain of command satellite user terminal, the relevant information of this entity management and maintenance customer's face context and proprietary satellite user terminal.Receive after the initial resource request message of MDM, satellite user terminal context management is to satellite user terminal resource management entity request resource, coordinate the resource of other user's face correspondent entities and distribute, and the relevant resource of this satellite user terminal of processing subsequent distributes, changes and deletes.
Wave beam local resource administration module SBRM (Spot Beam Resource Management) 35, SBRM is made up of a wave beam local resource management entity and a wave beam community context management entity.From module distribution, SBRM can expand and be distributed in multiple veneer modules.If the traffic carrying capacity of this resume module and data load are little, a SBRM just can meet the requirement of whole system user face application; In the time processing traffic carrying capacity increase, SBRM also can expand and be distributed in multiple veneer modules.
Wave beam local resource administration module SBRM (Spot Beam Resource Management) 35 comprises the management 36 of wave beam local resource and wave beam community context management 37.Wave beam local resource management 36, user's face resource behaviour in service by USBM module periodic report to wave beam local resource management entity, user's face resource situation of this entity record USBM module.Wave beam local resource management entity is received the resource request message of sending from wave beam community context management entity, selects the USBM module of allowable resource.Wave beam community context management 37, the relevant RRC message in context management entity handles chain of command wave beam community, wave beam community.User's face contextual information of particular beam community is distributed in this entity management and maintenance.Wave beam community context management entities scheduling is assigned to user's face resource of common signal channel.If satellite user terminal has used the common signal channel of this wave beam community, wave beam community context management entity will carry out interacting message with the satellite user terminal context management entity of this satellite user terminal of management.
SBSS user's face user terminal processes module UMSM (as shown in Figure 5).UMSM module is the destination node of the Radio interface protocols stack that satellite user terminal is relevant, is responsible for and the inter-module communication of URMM, and the preliminary treatment of chain of command being applied to the assignment messages of coming.The user's face application software UMSM moving on it realizes the user plane protocol processing relevant to user terminal.
SBSS user's ground roll Shu little Qu processing module USBM (as shown in Figure 5).USBM module is the destination node of the Radio interface protocols stack that wave beam community is relevant, is responsible for and the inter-module communication of URMM, and the preliminary treatment of chain of command being applied to the assignment messages of coming.The user's face application software USBM moving on it realizes the user plane protocol processing relevant to wave beam community.
GPRS support node GSN only has digital hardware unit, this unit, digital hardware unit has the form of the ATCA veneer that inserts machine frame, realizes functions such as controlling exchange, load balancing, calling party data management, accounting management, tracking, Lawful intercept management, external interface, Signalling exchange, user data processing on ATCA platform.
The module of GPRS serving GPRS support node SGSN comprises interface and clock module IFB/CLK, ethernet switching module GES, chain of command processing module GCPM (GSN C-plane Process Module) and user's face processing module GUPM (GSN U-plane Process Module), assigns in ATCA machine frame with the form of ATCA veneer.SBSS is identical with satellite base station system, and except ethernet switching module GES takies fixing groove position 7 and 8, the quantity of other module can be according to system configuration and capacity requirement flexible configuration.
Chain of command processing module GCPM has been mainly used in: (1) Central Control Function: realize load balancing, calling party data management, accounting management, tracking, Lawful intercept management and the internal communication function with other applied function module.(2) be responsible for and the processing of the reciprocity chain of command agreement of satellite base station system SBSS and other network element of core-network side, as mobile management and transaction management protocol processes.
User's face processing module GUPM:GUPM is mainly responsible for the processing of SGSN user plane protocol.
The module of gateway GPRS support node GGSN comprises interface and clock module IFB/CLK, ethernet switching module GES, user's face main control module GMCM (GGSN Main Control Module) and user's face processing module GUPM, is placed in ATCA machine frame.SBSS is identical with satellite base station system, and except Ethernet exchanging plate GES takies fixing groove position 7 and 8, the quantity of other module can be according to system configuration and capacity requirement flexible configuration.
User's face main control module GMCM, for completing Central Control Function: realize resource management, load balanced of user's face and the internal communication function with other applied function module.
User's face processing module GUPM:GUPM is mainly responsible for the processing of GGSN user plane protocol.
Another kind of Mobile satellite communication ground station system (SBSS+GSN) as shown in Figure 6, GPRS serving GPRS support node SGSN and gateway GPRS support node GGSN are merged into a network element entity GPRS support node GSN by this scheme.
System is made up of satellite base station system SBSS and two network element subsystems of GPRS support node GSN.Wherein, satellite base station system SBSS is divided into again radio frequency unit module and digital hardware unit module two parts.Radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, and the modules of the digital hardware cell mesh of satellite base station system SBSS and GPRS support node GSN assigns in ATCA rack separately with the form of ATCA veneer.According to the difference of Mobile satellite communication ground station system capacity, each network element subsystem can form a rack by the machine frame based on ATCA platform by one or more, and can increase one or more expansion rack again.
Between satellite base station system SBSS and GPRS support node GSN by wired connection (including but not limited to as Ethernet etc.).In satellite base station system SBSS, radio frequency unit module is connected by wired (including but not limited to as optical fiber etc.) with digital hardware unit module.
Wherein satellite base station system SBSS is the same with above-mentioned satellite base station system SBSS.Wherein the module of GPRS support node GSN comprises interface and clock module IFB/CLK, ethernet switching module GES, GSN chain of command processing module GCPM and GSN user's face processing module GUPM, assigns in ATCA machine frame with the form of ATCA veneer.SBSS is identical with satellite base station system, and except ethernet switching module GES takies fixing groove position 7 and 8, the quantity of other module can be according to system configuration and capacity requirement flexible configuration.
GSN chain of command processing module GCPM, for completing: (1) Central Control Function: realize load balancing, calling party data management, accounting management, tracking/Lawful intercept management and the internal communication function with other applied function module; (2) be responsible for and the processing of the reciprocity chain of command agreement of satellite base station system SBSS and other network element of core-network side, as mobile management and the processing of things management agreement.
GSN user's face processing module GUPM:GUPM is mainly responsible for the processing of GSN user plane protocol.
Fig. 7 shows the Mobile satellite communication ground station system All-In-One configuration schematic diagram based on ATCA platform, is another embodiment of the present invention.Satellite base station system SBSS, GPRS serving GPRS support node SGSN and gateway GPRS support node GGSN are merged into a network element entity by this scheme.
Due to the versatility of ATCA machine frame, veneer, interface, when Mobile satellite communication ground station system capacity less, disposal ability is less demanding, only need a small amount of necessary module can meet in the situation of desired disposal ability, power system capacity and function, the module integration of all network elements of foregoing Mobile satellite communication ground station system can be assigned in an ATCA rack, realize the All-In-One (All in one) of system network meta function.
Whole system is divided into radio frequency unit module and digital hardware unit module two parts.Radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, and digital hardware unit module assigns in ATCA rack with the form of ATCA veneer.According to the difference of Mobile satellite communication ground station system capacity, the satellite mobile communication ground station of this All-In-One can form a rack by the machine frame based on ATCA platform by one or more, and can increase one or more expansion rack again.In the system of All-In-One, radio frequency unit module is connected by wired (including but not limited to as optical fiber etc.) with digital hardware unit module.
In addition, as a further improvement on the present invention, the system redundancy that embodiment can adopt.Ethernet switching module GES adopts master-slave redundancy scheme or load sharing mode, preferred active and standby scheme.
Interface and clock module IFB/CLK can adopt the main backup scenario of 1+1, between every a pair of IFB/CLK, have standby usage relation.Radio frequency interface module RFI can adopt 1+1 backup or cold standby scheme, in the time using suitable cross bonding equipment to the transport network of radio frequency unit, can support the kinds of schemes such as N+1, N+M, N:M.Baseband processing module BB can adopt multiple backup scenario, as N+1, N+M, N:M etc.Chain of command main control module CCM, chain of command processing module GCPM and user's face main control module GMCM can adopt the main backup scenario of 1+1, between every a pair of CCM, GCPM, GMCM, have standby usage relation.Chain of command user function module MSM, chain of command wave beam community functional module SBM can adopt multiple backup scenario, as N+1, N+M, N:M etc.User's face common process module URMM, user's face user terminal processes module UMSM, user's ground roll Shu little Qu processing module USBM and user's face processing module GUPM can adopt multiple backup scenario, as N+1, N+M, N:M etc.
Owing to adopting switching network interconnection, rack and expansion rack room also can back up mutually, and particularly, in the time that GES place rack lost efficacy, the GES module of other rack can be taken over by certain mechanism the work of inefficacy rack.
In Mobile satellite communication ground station system of the present invention, all network elements have identical software architecture.Software architecture schematic diagram as shown in Figure 8.This software architecture is made up of following part:
Operating system OS (Operating System) 22: the real time operating system RTOS (Real Time Operating System) based on different hardware platforms (including but not limited to as ATCA hardware platform); Middleware MW (MiddleWare) 23: the software public module based on operating system OS, for upper layer software (applications) provides general basic function; Chain of command is processed CPP (Control Plane Processing) 24: realize chain of command signaling and process correlation function; User's face is processed UPP (User Plane Processing) 25: realize user face data and process correlation function; Operation and Maintenance OMP (Operating and MaintenanceProcessing) 26: realize foregrounding and safeguard correlation function.
Wherein, operating system OS and middleware MW form software common platform 27, for upper application software module provides general basic function; Chain of command is processed CPP 24, user's face and is processed UPP 25 and Operation and Maintenance to process OMP 26 be the application software module 28 on software common platform, completes specific application processing by the unified interface of calling software common platform and providing.
According to the capacity requirement of the disposal ability of digital hardware veneer and Mobile satellite communication ground station system, application software module can merge or discrete operating on same or polylith digital hardware veneer.Meanwhile, software common platform also can do suitable function cutting or combination according to the difference of application software module on veneer, realizes simplifying and optimizing of software on different veneers.
The software architecture that this patent proposes is applied to all network element subsystems of Mobile satellite communication ground station system, the feature of this versatility is the same with ATCA hardware platform architectural framework, make the acquisition of Mobile satellite communication ground station system reduce software development, maintenance, upgrading workload, shorten the construction cycle, easily obtain and many benefits such as support and reduce costs.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (1)
1. a Mobile satellite communication ground station system, is characterized in that, described Mobile satellite communication ground station system adopts high ATCA platform system structure; This system comprises at least one satellite base station system SBSS and a GPRS support node GSN; Between described satellite base station system SBSS and GPRS support node GSN, form local network by wired connection; Described satellite base station system SBSS is connected by feeding link with communication satellite; Described satellite base station system SBSS is responsible for processing the access of satellite user terminal in local network; Described GPRS support node GSN is responsible for processing communicating by letter between communication in local satellite mobile communication network and local network and external network;
Described satellite base station system SBSS comprises radio frequency unit and the first digital hardware unit, and described radio frequency unit separates with the first digital hardware unit, and connects by wire transmission circuit;
Described the first digital hardware unit has the form of the ATCA veneer that inserts machine frame, described the first digital hardware unit is by baseband processing module BB, radio frequency interface module RFI, interface and clock module IFB/CLK, ethernet switching module GES, SBSS chain of command main control module CCM, SBSS chain of command user terminal functional module MSM, SBSS chain of command wave beam community functional module SBM, SBSS user's face common process module URMM, SBSS user's face user terminal processes module UMSM and SBSS user's ground roll Shu little Qu processing module USBM form, on ATCA platform, realize and control exchange, external interface, Base-Band Processing, Signalling exchange, user data processing capacity, described interface and clock module IFB/CLK adopt the main backup scenario of 1+1, described radio frequency interface module RFI adopts 1+1 backup or cold standby scheme, described baseband processing module BB adopts N+1, N+M, N:M backup scenario, described SBSS chain of command main control module CCM adopts the main backup scenario of 1+1, described SBSS chain of command user terminal functional module MSM, SBSS chain of command wave beam community functional module SBM adopts N+1, N+M, N:M backup scenario, described SBSS user's face common process module URMM, SBSS user's face user terminal processes module UMSM, SBSS user's ground roll Shu little Qu processing module USBM adopts N+1, N+M, N:M backup scenario,
Described radio frequency unit adopts the independent radio frequency rack of non-ATCA platform, described radio frequency unit by RF front-end module FEB, receive calling module TRB and power amplifier PA and form, complete the power amplification of modulation /demodulation between transmission reception, baseband signal and the carrier signal of control processing, wireless channel data of wireless channel in satellite base station system SBSS and Up/Down Conversion, wireless carrier and send receiving function;
Described GPRS support node GSN comprises the second digital hardware unit, described the second digital hardware unit has the form of the ATCA veneer that inserts machine frame, realizes and control exchange, load balancing, calling party data management, accounting management, tracking, Lawful intercept management, external interface, Signalling exchange, user data processing capacity on ATCA platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110208247.9A CN102427380B (en) | 2011-07-25 | 2011-07-25 | Mobile satellite communication ground station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110208247.9A CN102427380B (en) | 2011-07-25 | 2011-07-25 | Mobile satellite communication ground station system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102427380A CN102427380A (en) | 2012-04-25 |
| CN102427380B true CN102427380B (en) | 2014-08-06 |
Family
ID=45961326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110208247.9A Expired - Fee Related CN102427380B (en) | 2011-07-25 | 2011-07-25 | Mobile satellite communication ground station system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102427380B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3048745A1 (en) * | 2015-01-20 | 2016-07-27 | Airbus Defence and Space Limited | Space network node receiving data from terrestrial and space nodes. |
| CN106060814B (en) * | 2016-05-18 | 2020-05-29 | 协同通信技术有限公司 | Satellite broadband network service equipment, operation platform and authentication method |
| CN106332321A (en) * | 2016-08-23 | 2017-01-11 | 浙江天地人科技有限公司 | Base station |
| CN113852414A (en) * | 2021-09-27 | 2021-12-28 | 中国电子科技集团公司第五十四研究所 | Method for realizing dynamic management of satellite load resources in low-orbit constellation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627686A (en) * | 2003-12-12 | 2005-06-15 | 上海贝尔阿尔卡特股份有限公司 | Multistandard wireless network controller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137783A (en) * | 1997-12-02 | 2000-10-24 | Ericsson Inc | System and method for reduced network information handovers |
| WO2006026891A1 (en) * | 2004-09-08 | 2006-03-16 | Utstarcom Telecom Co., Ltd. | Centrailzed base-station system based on atca architeture platform |
-
2011
- 2011-07-25 CN CN201110208247.9A patent/CN102427380B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627686A (en) * | 2003-12-12 | 2005-06-15 | 上海贝尔阿尔卡特股份有限公司 | Multistandard wireless network controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102427380A (en) | 2012-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102255648B (en) | Satellite mobile communication ground station system | |
| CN110049512B (en) | Forward-transmission network data processing device and method | |
| US5809028A (en) | Protocol converter for a wireless telecommunications system | |
| CA1271548A (en) | Distributed switching architecture | |
| EP0824836B1 (en) | Cellular base station with intelligent call routing | |
| CN100559737C (en) | Space-based mobile communication system and communication means | |
| CA2202116C (en) | Packetized cdma/tdm satellite communication system | |
| EP1890443A2 (en) | System and method for implementing a multi-radio wireless network | |
| CN102255649B (en) | Satellite mobile communication ground station system | |
| CN101006738A (en) | Central base station system based on advanced telecommunication computer system structure | |
| WO1996038950A1 (en) | Remote control of wireless telecommunications systems | |
| CN1926891A (en) | Distributed wireless system for controlling the resource centrally | |
| JP6401797B2 (en) | Remote radio unit hub RHUB, indoor communication system, and signal transmission method | |
| CN102427380B (en) | Mobile satellite communication ground station system | |
| US20070280159A1 (en) | Load-Sharing Method And System In A Wireless Base Station | |
| CN102427381A (en) | Satellite base station system | |
| CN101159893B (en) | Distributed base station controller and its unit, data transmission method | |
| US10869222B2 (en) | Data frame transmission method and apparatus for virtual elastic CPRI interface | |
| US20020077112A1 (en) | Distributed cellular network communication system | |
| US8131309B2 (en) | Radio communication system, base transceiver station, and extension device | |
| GB2213025A (en) | Point-to-multipoint communication system | |
| KR20110113495A (en) | Method for transmitting up-link data and down-link data of master-slave system, extended apparatus for programmable logic controller system | |
| US7443864B1 (en) | Wireless communication system backhaul architecture | |
| US6580925B2 (en) | Arrangement relating to telecommunication | |
| CN111586500B (en) | Distributed synchronous multiplexing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150725 |
|
| EXPY | Termination of patent right or utility model |