CN103973404A - CPCI (compact peripheral component interconnect) bus based network code controller - Google Patents
CPCI (compact peripheral component interconnect) bus based network code controller Download PDFInfo
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Abstract
A CPCI (compact peripheral component interconnector) bus based network code controller comprises a power source module, a front panel module and a CPCI bus. An interface module, a master control module, a frequency synthesizing module and a network code module are connected on the CPCI bus. The network code module comprises an ultrashort wave network code module and a microwave frequency band network code module. The interface module receives external information, converts the information to digital signals and transmits the digital signals to the master control module through the CPCI bus. The master control module transmits the received signals to the network code module. The network code module subjects the signals to network code processing according to node numbers. The processed data are transmitted to the master control module through the CPCI bus, the master control module transmits the returned data to the interface module via the CPCI bus, and the interface module converts the data into analog signals to output. By means of the opening structure of the CPCI bus, various functional expansion modules can be conveniently inserted, diversified configuration can be expanded, energy consumption of the network code controller on network nodes is reduced and network robustness is improved.
Description
Technical field
The present invention relates to network code controller, be specifically related to the network code controller based on cpci bus.
Background technology
In wireless, autonomous communications network, along with adding the system of network and user's continuous increase, design capacity can not satisfy the demands gradually.Due to restriction mutually between communication distance, capacity, larger message capacity has limited communication distance simultaneously, and communication distance far away has limited message capacity.
In traditional communication network, the effect that network node plays is just stored or forwarding capability passed network data, and middle network data is left intact and is processed, and just as the responsibility of middle route, is only the role of intermediate repeater.People generally believe that processing can not produce other benefits to intermediate node for network data all the time, until 2000, the people such as R.Ahlswede have delivered one section of article that is entitled as " network information flow " on IEEE trans-IT, proposed the concept of network code, this traditional view has thoroughly taken on a new look.Study from data communication theoretical point view, node not only only does storage forwarding function, can carry out linearity or non-uniform encoding operation to the relevant information of receiving, coded data after treatment directly transfers out again, centre plays a part coded message, and network code arises at the historic moment according to this thought just, on network objectives end receiving node, again coded message recompile is translated, then send to final receiving terminal.
At present, network coding technique has become a study hotspot in wireless Ad Hoc communication, network coding technique carries out certain linearity or Nonlinear Processing by network node to the data message of receiving on many input links, then send, node plays a part encoder or signal processor again.By network code, can reach max-flow circle of multicast network transmission, and traditional multicast routing mode generally can not reach this boundary.Prior art has limited power system capacity, and has the problems such as the consumption of Nodes energy is large, propagation efficiency is not high.Designing a kind of network code controller that can satisfy the demands becomes the direction of technical development.
Network code has changed the pattern of " storage → forwarding " on legacy network intermediate node, become one of research direction important in the 21st century communications field, it is greatly improved the computing capability of intermediate node and has also brought qualitative leap to the performance of each side in network; Network code is one of key technology in current communications applications, network code is effectively processed the network information at network node place, data are after treatment carried out unloading or transmission, its essence is all to cross the operation to transmission data encoding to realize, save to a certain extent network resource consumption, after network code, can send more transfer of data, greatly improve the transmission capacity of communication channel, save the advantages such as network broadband resource.
Application network coding, can solve the insurmountable problem of technology such as traditional route, cross-layer design, improves network performance.The application of network code in wireless network can improve the throughput of network, especially multicast throughput.Can reduce the propagation times of packet, reduce wireless transmission energy consumption.In the time of network portion node or link failure, adopt random network code, finally still can recover initial data in destination node, strengthen fault-tolerance and the robustness of network.Network code is mainly reflected in the performance improvement of wireless network in the throughput that improves network code, and network code has been proved to be for the throughput that improves some network very large effect.Use network code can improve to a great extent network throughput, but can increase the complexity of network simultaneously.Many researchers are when research improves the multicast throughput of wireless network, and how research reduces because of the Adoption Network complexity of bringing of encoding.Under the severe condition of network condition, between network code and route, the difference of multicast throughput is little, and the advantage of network code is embodied in and reduces on network complexity; Under the good condition of network condition, network code, with respect to method for routing, to a great extent, has improved multicast throughput.This provides possibility for dynamically adjust network code algorithm according to network condition.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of network code controller based on cpci bus, utilize that cpci bus transmission speed is fast, the feature of signal stabilization, by the network code function of Configuration ultrashort wave, microwave communication.
Technical scheme: the network code controller based on cpci bus, comprises power module and front panel module; It is characterized in that, comprise cpci bus, on cpci bus, be connected with interface module, main control module, frequency synthesis module and network code module; Network code module comprises ultrashort wave network code module and microwave frequency band network code module;
Interface module receives external information, and information is converted to after digital signal, sends into main control module by cpci bus; Main control module is sent the signal receiving into network code module; Network code module is carried out network code processing by signal according to nodes; Data after treatment are sent main control module back to by cpci bus, and main control module is sent the data of returning into interface module by cpci bus, and interface module is exported after data transaction is become to analog signal.
The control method of network code controller; In the time of the two places of network code controller in receiving and being distributed to or how data sink nodes 3, by the two places that receive or how data carry out forwarding or distribution after XOR; When how network code controller in the time receiving the sink nodes of two places or data, how its decoding is recovered to two places or all data of sending; Complete information is received in i.e. decoding.
Frequency synthesis module is that network is in the time being positioned at information transmitting node, CPM or the GMSK data of supposing to issue each packets of information of the node 1 with two transmitting branches are P1, CPM or the GMSK data of supposing to issue each packets of information of the node 2 with two transmitting branches are P2, the data message of time-division slot transmission P1 and P2 in cpci bus now; In the time being positioned at node 1, obtain P1 data from CPCI data, data are forwarded by cpci bus again simultaneously; In the time being positioned at node 2, obtain P2 data from CPCI data, data are forwarded by cpci bus again simultaneously; In the time being positioned at node 1 and 2 aggregation node 3, obtain respectively P1 and P2 data from CPCI data, carry out P1 ⊕ P2 (being XOR), data are forwarded by cpci bus again simultaneously; In the time being positioned at the node 5 that node 1 and 3 converges, obtain respectively P1 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P2 data, data are sent by cpci bus simultaneously; In the time being positioned at the node 6 that node 2 and 4 converges, obtain respectively P2 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P1 data, data are sent by cpci bus simultaneously.
Coding module provides clock signal.
Interface module comprises optical fiber port, network interface, serial ports and audio port.Support multiple interfaces, can provide information for multiple terminal.
Beneficial effect of the present invention: (1) cpci bus has open structure, can insert various function expanding modules easily, has upgrading ability flexibly, can expand diversification configuration.(2) network code controller of the present invention has improved the power system capacity of wireless, autonomous communications network, and has reduced the energy consumption of network code controller on network node, improve network robustness.
Brief description of the drawings
Fig. 1 is module composition schematic diagram
Fig. 2 is data flow schematic diagram
Fig. 3 is network code processing node position view
Embodiment
Below in conjunction with accompanying drawing, the present invention is done further and explained.
Not only data transmission bauds is fast but also slot standard for standard C pci bus, thereby digital signal is difficult for the disturbed requirement having reduced total beta radiation.Cpci bus has extreme high reliability, impact resistance and vibration resistance, can support more slot.This bus has open structure, can insert easily various function expanding modules, has upgrading ability flexibly.Cpci bus is applied in network code controller, can improve power system capacity, have huge advantage and development prospect at aspects such as data compression, the consumption of reduction node energy, raising network robustness.
As shown in Figure 1, the network code controller based on cpci bus, comprises power module and front panel module; It is characterized in that, comprise cpci bus, on cpci bus, be connected with interface module, main control module, frequency synthesis module and network code module; In this example, network code module comprises ultrashort wave network code module and microwave frequency band network code module, also can add according to demand other module.
Network code controller can be controlled and data interaction outside ultrashort wave, microwave telecommunication devices by network interface, optical fiber, serial ports, audio port etc., realizes network code processing.
The front panel module of controller provides the interface of man-machine interaction for whole controller, and frequency synthesis module provides clock signal for network code module.
As shown in Figure 2, the data that interface module is mainly collected the optical fiber port from outside, network interface, serial ports, audio port, convert digital signal to, deliver to main control module by cpci bus.Meanwhile, interface module also needs the CPCI data transaction that main control module is sent here to become light signal, network data, serial data, audio signal etc. to send.
Main control module is by other each module of cpci bus control, and monitors the operating state of each module.In this example, main control module can load Windows XP or vxworks operating system.Main control software is responsible for controlling and showing, software is developed under Windows XP or under vxworks operating system.In different system, need to install different CPCI drivers.
What main control module was sent interface module here simultaneously passes through the Data dissemination of CPCI to ultrashort wave network code module, microwave frequency band network code module etc., then carries out network code processing by each network code module according to different nodes.
Ultrashort wave network code module for the treatment of (comprising encoding and decoding) wherein ultra short wave communication data, comprise the modulation /demodulation such as CPM, GMSK data, microwave frequency band network code module for the treatment of (comprising encoding and decoding) microwave communication data, comprise the modulation /demodulation such as QAM, OFDM data.
In ultrashort wave network code module, often carry out CPM or GMSK modulation /demodulation.As shown in Figure 3, in the time being positioned at information transmitting point, suppose CPM(or the GMSK of each packets of information of issuing node 1) data are P1, suppose CPM(or the GMSK of each packets of information of issuing node 2) data are P2, the data message of time-division slot transmission P1 and P2 in cpci bus now.In the time being positioned at node 1, obtain P1 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 2, obtain P2 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 3, obtain respectively P1 and P2 data from CPCI data, carry out P1 ⊕ P2 (XOR), data are forwarded by cpci bus again simultaneously.In the time being positioned at node 4, obtain P1 ⊕ P2 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 5, obtain respectively P1 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P2 data, data are sent by cpci bus simultaneously.In the time being positioned at node 6, obtain respectively P2 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P1 data, data are sent by cpci bus simultaneously.
In microwave frequency band network code module, often carry out QAM or OFDM modulation /demodulation.As shown in Figure 3, in the time being positioned at information transmitting point, suppose QAM(or the OFDM of each packets of information of issuing node 1) data are P1, suppose QAM(or the OFDM of each packets of information of issuing node 2) data are P2, the data message of time-division slot transmission P1 and P2 in cpci bus now.In the time being positioned at node 1, obtain P1 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 2, obtain P2 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 3, obtain respectively P1 and P2 data from CPCI data, carry out P1 ⊕ P2 (XOR), data are forwarded by cpci bus again simultaneously.In the time being positioned at node 4, obtain P1 ⊕ P2 data from CPCI data, data are forwarded by cpci bus again simultaneously.In the time being positioned at node 5, obtain respectively P1 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P2 data, data are sent by cpci bus simultaneously.In the time being positioned at node 6, obtain respectively P2 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P1 data, data are sent by cpci bus simultaneously.
In wireless, autonomous communications network, by having formed multinode network after network code controller control communication equipment of the present invention, as shown in Figure 3.Wherein arrow represents oriented link, and name a person for a particular job P1 and P2 information of information transmitting sends node 5 and 6 to.After Adoption Network coding method, when network code controller is during in node 3, the data P1 of the two places that receive and P2 are carried out forwarding after XOR.When network code controller is during in node 4, then by data retransmission after treatment XOR to node 5 and 6.When network code controller is during in node 5, receiving node 5 is received P1 and P1 ⊕ P2 (XOR) by node 1 and 4, and its decoding is recovered to P2, and in like manner receiving node 6 also can be received complete information by decoding.
The present invention passes through flexible configuration, realize the network code function of ultrashort wave, microwave communication, ultrashort wave and microwave communication capacity are effectively promoted, in wireless, autonomous communications network, the present invention not only can improve power system capacity, has significant effect at aspects such as data compression, the consumption of reduction node energy, raising network robustness.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the network code controller based on cpci bus, comprises power module and front panel module; It is characterized in that, comprise cpci bus, on cpci bus, be connected with interface module, main control module, frequency synthesis module and network code module; Network code module comprises ultrashort wave network code module and microwave frequency band network code module;
Interface module receives external information, and information is converted to after digital signal, sends into main control module by cpci bus; Main control module is sent the signal receiving into network code module; Network code module is carried out network code processing by signal according to nodes; Data after treatment are sent main control module back to by cpci bus, and main control module is sent the data of returning into interface module by cpci bus, and interface module is exported after data transaction is become to analog signal.
2. the network code controller based on cpci bus as claimed in claim 1, is characterized in that, described frequency synthesis module provides clock signal for network code module.
3. the network code controller based on cpci bus as claimed in claim 1, is characterized in that, described interface module comprises optical fiber port, network interface, serial ports and audio port.
4. the application of the network code controller based on cpci bus as claimed in claim 1, it is characterized in that in the time of the two places of network code controller in receiving and being distributed to or how data sink nodes, by the two places that receive or how data carry out forwarding or distribution after XOR; When how network code controller in the time receiving the sink nodes of two places or data, how its decoding is recovered to two places or all data of sending; Complete information is received in i.e. decoding.
5. the application of the network code controller based on cpci bus as claimed in claim 4, is characterized in that, in ultrashort wave network code module or microwave frequency band network code module, carrying out CPM or GMSK modulation /demodulation; In the time being positioned at information transmitting node, CPM or the GMSK data of supposing to issue each packets of information of the node 1 with two transmitting branches are P1, CPM or the GMSK data of supposing to issue each packets of information of the node 2 with two transmitting branches are P2, the data message of time-division slot transmission P1 and P2 in cpci bus now; In the time being positioned at node 1, obtain P1 data from CPCI data, data are forwarded by cpci bus again simultaneously; In the time being positioned at node 2, obtain P2 data from CPCI data, data are forwarded by cpci bus again simultaneously; In the time being positioned at node 1 and 2 aggregation node 3, obtain respectively P1 and P2 data from CPCI data, carry out P1 ⊕ P2 (being XOR), data are forwarded by cpci bus again simultaneously; In the time being positioned at the node 5 that node 1 and 3 converges, obtain respectively P1 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P2 data, data are sent by cpci bus simultaneously; In the time being positioned at the node 6 that node 2 and 4 converges, obtain respectively P2 and P1 ⊕ P2 data from CPCI data, then carry out network decoding and obtain P1 data, data are sent by cpci bus simultaneously.
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| CN110620590A (en) * | 2019-08-14 | 2019-12-27 | 熊猫电子集团有限公司 | Serialized short-wave communication platform |
| CN115277292A (en) * | 2022-07-22 | 2022-11-01 | 四川灵通电讯有限公司 | Two-wire system inter-device communication method based on network coding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110620590A (en) * | 2019-08-14 | 2019-12-27 | 熊猫电子集团有限公司 | Serialized short-wave communication platform |
| CN115277292A (en) * | 2022-07-22 | 2022-11-01 | 四川灵通电讯有限公司 | Two-wire system inter-device communication method based on network coding |
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