CN101795146B - Multi-frequency-band cognitive network node used for frequency spectrum monitoring - Google Patents

Multi-frequency-band cognitive network node used for frequency spectrum monitoring Download PDF

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CN101795146B
CN101795146B CN 201010121647 CN201010121647A CN101795146B CN 101795146 B CN101795146 B CN 101795146B CN 201010121647 CN201010121647 CN 201010121647 CN 201010121647 A CN201010121647 A CN 201010121647A CN 101795146 B CN101795146 B CN 101795146B
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band
module
microprocessor
cognitive
spectrum
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CN101795146A (en
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吴威
刘旭东
苏金钊
周忠
赵沁平
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北京航空航天大学
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Abstract

本发明设计了一种应用于无线认知网络中多频段频谱检测的硬件终端,用于检测和利用授权电视广播频段和非授权ISM部分频段中的频谱资源。 The present invention contemplates a method applicable to a wireless hardware, cognitive network terminals of the multi-band spectrum detection, for detecting and authorizing use of spectrum resources television broadcast bands and unlicensed ISM frequency band portion. 授权电视广播频段主要集中在47MHz~910MHz VHF/UHF中的TV信道,非授权ISM频段主要集中在433.05MHz~434.79MHz、902~928MHz以及2.400~2.4835GHz(ZigBee)频段。 Authorized television broadcasting band mainly in the 47MHz ~ 910MHz VHF / UHF TV channels in, unlicensed ISM band mainly in 433.05MHz ~ 434.79MHz, 902 ~ 928MHz and 2.400 ~ 2.4835GHz (ZigBee) band. 认知节点的硬件由处理器、射频模块、存储器、显示模块、电源模块组成;处理器采用ARM公司的ARM1136(J)FS微处理器内核,负责整个节点的任务调度、信息处理、驱动模块以及网络协议栈。 Cognitive node hardware by a processor, RF module, a memory, a display module, a power module; ARM processor's ARM1136 (J) FS microprocessor core, the entire node is responsible for task scheduling, information processing, and a driving module network protocol stack. 射频模块分三个部分,分别负责对电视广播频段和ISM频段的扫描。 RF module divided into three parts, each responsible for scanning television broadcast band and the ISM band. 对于电视广播频段的扫描采用Broadcom BCM2940移动电视接收器,ISM频段中433.05MHz~434.79MHz、902~928MHz采用PTR8000+射频模块进行扫描,ZigBee频段则采用CC2420射频芯片进行扫描。 For scan TV broadcast bands using Broadcom BCM2940 mobile TV receivers, ISM band 433.05MHz ~ 434.79MHz, 902 ~ 928MHz RF module using PTR8000 + scan, ZigBee chip CC2420 RF frequency band is used for scanning. 本发明可以通过上述装置对相应频段进行扫描,显示出各个频段相应频谱的资源信息,最终实现对无线频谱资源的检测。 The present invention may be performed by means of the above-described respective ranges scan, showing the respective spectral bands each resource information, and ultimately detection of the radio spectrum resources.

Description

用于频谱监测的多频段认知网络节点 For multi-band spectrum monitoring of cognitive network node

技术领域 FIELD

[0001] 本发明涉及用于频谱检测的认知网络节点,更具体地,涉及频谱检测认知无线电,属于认知无线电技术领域。 [0001] The present invention relates to a network node for cognitive spectrum sensing, and more particularly, to a spectrum sensing in cognitive radio, cognitive radio technical field belongs.

背景技术 Background technique

[0002] 认知网络是在认知无线电(Cognitive Radio, CR)的基础上发展而来的。 [0002] Cognitive network is developed on the basis of cognitive radio (Cognitive Radio, CR) on. 认知无线电最初提出的目的是要解决无线频谱资源紧张而已分配的频谱利用率不高的问题。 The purpose of cognitive radio initially proposed to solve the wireless spectrum resource constraints only allocated spectrum utilization rate is not high. 一方面在传统的频谱管理方式下,大部分国家的无线电管理部门已经将3GHz以下的频率分配给不同的用户,因此随着人们移动无线业务需求的不断增加,无线电资源将变得越来越稀缺。 On the one hand in the traditional spectrum management, radio management departments in most countries have to 3GHz frequencies are allocated to different users, so as people move ever-increasing demand for wireless services, radio resources will become increasingly scarce . 而另一方面,由美国联邦通信委员会(Federal Communication Commissions, FFC)的测试报告显示在不同的时间和空间内已分配的频谱利用率从15%到85%不等。 On the other hand, displayed by the test report of the US Federal Communications Commission (Federal Communication Commissions, FFC) has been allocated in different temporal and spatial spectral efficiency ranging from 15% to 85%. [0003] 为了缓解当前频谱利用率低下与不断增长的频谱资源需求之间的矛盾,学术界提出了CR的概念。 [0003] In order to ease the contradiction between the current low utilization of the spectrum with the growing demand for spectrum resources, academia put forward the concept of CR. 认知无线电通过感知频率、时间和空间域等频谱环境实现频谱动态共享,提供灵活的频谱利用,利用闲置频谱进行信号传输,以满足商业、军事、政府客户不断变化的需求。 Cognitive radio is achieved by the perceived frequency, time and spatial domain spectral environment such as dynamic spectrum sharing, provide flexible spectrum use, the use of idle spectrum signal transmission to meet the commercial, military and government customers' changing needs. 目前CR的研究刚刚起步,很多观点还没有统一,甚至争议很大,例如授权用户怀疑CR用户频谱检测的可靠性,担心通信可靠性受到CR用户的威胁;另一方面目前提出的各种频谱检测方法往往没有机会在实际的系统上去验证。 Currently CR study has just started, many points have not yet unified, even controversial, such as authorized users doubt the reliability of user CR spectrum sensing, communication reliability fear threatened CR users; on the other hand various spectrum sensing current proposed methods often do not have the opportunity to go up in the actual verification system. 因此,一个具体的实验系统可以很好的说明和验证CR的诸多问题,会对CR理论的研究和标准的确立积累经验、提供参考。 Therefore, a specific experimental system can be a good description and verification problems CR, establishing standards of research and theory of CR will gain experience, to provide a reference.

[0004] 目前较为流行和成熟的软件无线电平台是Eric Blossom于2000年提出的GUN Radio 和Ettus Matt 提出的通用软件无线电外设(Universal Software RadioPeripheral, USRP), GUNRadio是一个开源的用于构建软件无线电平台的软件包,负责对从硬件平台USRP接收到的数字信号进行处理,然后将处理后的数据通过PC的显示器或声卡传给外界。 [0004] the more popular and mature software radio platform is Eric Blossom proposed in 2000 GUN Radio and Ettus Matt proposed by the Universal Software Radio Peripheral (Universal Software RadioPeripheral, USRP), GUNRadio is an open source software for building radio software package platform, is responsible for receiving from the USRP hardware platform to digital signal processing, and then the processed data is passed to the outside world through a PC monitor or sound card. USRP包含一个母版和若干子板,母版负责对来自子板的实时信号或IQ信号进行转换最终传输到PC中。 USRP comprising a master and a plurality of daughter boards, the master is responsible for the real-time signal from the sub-plate or a final converted IQ signal transmitted to the PC. 其可以更换子板来实现对不同频段的扫描,但是不能同时对多个频段进行扫描,而本发明可以同时对三个频段进行扫描,更充分的利用频谱资源。 Daughter board which can be replaced to achieve scanning of different frequency bands, but not at the same time to a plurality of frequency scanning, and the present invention can simultaneously scan three bands, better use of spectrum resources.

发明内容 SUMMARY

[0005] 本发明的目的是实现一种用于频谱检测的认知网络节点,其可以感知一定频段内的频谱资源的使用情况。 Objective [0005] The present invention is to achieve a cognitive network node for detecting the spectrum, which can be perceived spectrum resource usage within a certain band. 通过对三个不同频段进行监控,充分并有效的利用现有的频谱资源。 Monitored by three different frequency bands, full and effective use of the available spectrum resources.

[0006] 本发明采用的技术方案为: [0006] aspect of the present invention is used are:

[0007] 用于频谱检测的认知网络节点,其特征是,该节点的硬件由处理器、射频模块、存储器、显示模块和电源模块组成,射频模块、存储器、显示模块与处理器相连,电源模块为其它各个模块提供电源。 [0007] Cognitive network node for detecting the spectrum, characterized in that the node hardware by a processor, RF module, a memory, a display module and a power module, a radio frequency module, a memory, a display coupled to the processor module, power supply module provides power to each of the other modules.

[0008] 处理器采用ARM公司的ARMl 136J (F) -S微处理器内核,配合适当的外围电路,搭建起整个节点的硬件平台。 [0008] ARM processor's ARMl 136J (F) -S microprocessor core, with appropriate peripheral circuitry, hardware platform to build up the entire node. 通过处理器的I/o引脚可以实现RS232、SPI以及USB等通用硬件标准接口,同时也可以通过处理器实现其硬件接口的驱动程序,数据读写程序,使得射频设备接入认知节点后可立即进行相应频谱的扫描。 After o pins may be implemented by the processor I / RS232, SPI, and USB, standard common hardware interface, while the driver may be implemented by the processor hardware interface, data read and write procedures, such cognitive radio access node equipment the corresponding spectrum can be scanned immediately.

[0009] 射频模块主要负责对三个频段进行感知与发送: [0009] RF module is mainly responsible for the three frequency bands perception and send:

[0010] I. 47MHz〜910MHzVHF/UHF频段中的TV信道的感知和发送 [0010] I. 47MHz~910MHzVHF / TV channels in the UHF band perception and transmission

[0011] 对于信号发送,将由认知节点实现DVB-H传输IP服务的传输系统。 [0011] For signal transmission, realized by the node cognitive DVB-H IP transport services delivery system. 由微处理器对感知到的数据进行一定的封装然后发射出去。 Performed by the microprocessor of the data sensed certain packages and then sent.

[0012] 对于信号接收,采用电视广播接收器接收地面广播和卫星广播的数字电视信号。 [0012] For signal reception, the use of television broadcast receiver receiving terrestrial broadcast and satellite broadcast digital television signals. 本发明利用硬件方式来实现DVB-H MPE-FEC纠错机制,修复错误及还原发送的数据。 The present invention is implemented by hardware embodiment DVB-H MPE-FEC error correction mechanism, to fix the error and restore the transmitted data. 采用Broadcom BCM2940的移动电视接收器。 Mobile television receiver using the Broadcom BCM2940.

[0013] 2. 433. 05 〜434. 79MHz 和902 〜928MHz ISM 频段的感知和发送 [0013] 2. 433. 05 ~434. 79MHz and 902 ~928MHz perception and transmission ISM band

[0014] 选用挪威Nordic VLSI公司生产的nRF905单片射频收发芯片。 [0014] Selection of Norwegian company Nordic VLSI Chip RF Transceiver nRF905. 其可以工作于433/868/915MHZ三个ISM(工业、科学和医学)频段,并可以感知与探测相应频段上的频谱信息。 It can work in 433/868 / 915MHZ three ISM (industrial, scientific and medical) band, and can be perceived with the probe corresponding spectral information on the band.

[0015] 3. 2. 400 〜2. 4835GHz ISM 频段(ZigBee)的感知和发送 [0015] 3. 2. 400 ~2. 4835GHz ISM band (the ZigBee) perception and transmission

[0016] 选用工作在2. 4GHz的单芯片低电压CC2420收发器。 [0016] Adopting in a low voltage CC2420 transceiver 2. 4GHz single chip. CC2420是TI-Chipcon公司推出的首款符合2. 4GHz IEEE802. 15. 4标准的射频收发器,也是第一款适用于ZigBee产品的RF器件。 TI-Chipcon CC2420 is a company's first line with 2. 4GHz IEEE802. 15. 4 standard RF transceiver, is the first device for RF ZigBee products. ·[0017] 与现有技术相比,本发明的有益效果为: * [0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 传统的无线通信设备通常只能使用预先分配的确定频段,其硬件仅支持较小的频带范围,并且只能以固定的带宽工作。 [0018] The conventional wireless communication device is typically only used to determine a pre-assigned band, the hardware supports only a small frequency range, and can only work with a fixed bandwidth. 本发明的认知节点装置可以在三个不同的的频段范围内选择工作频段,结合具体的算法,具体分析射频环境、判断授权用户(如电视用户)的存在和出现,以及根据分析结果调整参数、采取合理避让策略,而不对其频段上原始的授权用户造成不能容忍的影响。 Cognitive node device of the present invention may be selected in three different frequency bands of the frequency range, in conjunction with specific algorithms, particularly the RF environment analysis, determines the authorized user (e.g., user television) and the presence of occurrence, and the adjustment parameter based on the analysis take reasonable avoidance strategy, it can not be tolerated without affecting its original authorized user on the band.

附图说明 BRIEF DESCRIPTION

[0019] 图I是认知节点的硬件体系结构框架; [0019] Figure I is a hardware configuration framework cognitive node;

[0020] 图2是ARMl 136J (F)-S微处理器内核架构; [0020] FIG. 2 is a ARMl 136J (F) -S microprocessor core architecture;

[0021 ] 图3是DVB-H数据封装格式; [0021] FIG. 3 is a DVB-H data encapsulation format;

[0022] 图4是认知节点应用示意图; [0022] FIG. 4 is a schematic view of the application of cognitive node;

具体实施方式 Detailed ways

[0023] 以下结合附图对本发明作进一步的详细说明。 [0023] conjunction with the drawings of the present invention will be further described in detail.

[0024] 其硬件的总体结构图如图I所示,传感器节点由图中所示的处理器、射频模块、显示模块、以及电源模块组成。 [0024] The overall structure of the hardware in FIG. I, processor, RF module shown in FIG sensor node in, the display module, and a power module. 射频模块、存储器、显示模块和处理器相连,电源模块为各模块提供电源。 RF module, a memory, and a processor connected to the display module, the power supply module provides power to each module.

[0025] 传感器节点的处理器芯片选用以ARM公司的ARM1136J(F)-S为内核的微处理器,ARM1136J(F)-S内核基于ARMv6指令集体系结构,采用8级流水线操作,Load-Store单元和算术运算单元分别具有独立的流水线,并具有转移预测和前向数据通道,可以高效地提高流水线操作的效率。 Processor chip [0025] Selection of sensor nodes to ARM's ARM1136J (F) -S kernel of a microprocessor, ARM1136J (F) -S core based ARMv6 instruction set architecture, an 8-stage pipeline operation, Load-Store and arithmetic operation unit cells each having a separate assembly line, and having a branch prediction and a forward data channel, can be efficiently improve the efficiency of the pipeline operation. ARMv6的体系中,处理器内核、指令Cache和数据Cache之间,以及内核与协处理器之间的数据通道为64bit,允许在单个周期发射两条指令,大大提高了数据的传送速率,同时又避免了64位处理器所带来的功耗和成本的大幅度上升。 ARMv6 system in between the processor core, and data Cache Instruction Cache, and the data channel between the core and the coprocessor to 64bit, allowed to transmit two instructions in a single cycle, greatly improving the data transfer rate, while avoid the substantial increase in power consumption and cost 64-bit processor brings. ARMv6的指令集增加了大量支持多媒体的指令,使ARMll适合于音频和视频信号处理及三维图像信号处理,ARMl I的MMU可以支持存储器的高速存取。 ARMv6 instruction set instruction adds substantial support multimedia, is adapted to make ARMll audio and video signal processing and three-dimensional image signal processing, MMU ARMl I can support high-speed access memory. ARM1136J(F)-S内核最高频率可达660MHz,因此处理能力非常强大。 ARM1136J (F) -S core highest frequency up to 660MHz, thus the processing capacity is very strong. 设计微处理器的I/O引脚及外围电路,实现USB、RS232等通用硬件标准接口,并实现其接口的驱动程序及数据读写程序,通过这些接口就可以更方便的扩展外围设备。 I / O pin of the microprocessor and peripheral circuit design, implement USB, RS232 standard and other common hardware interface, and implementation of the driver which interfaces to read and write programs and data, via these interfaces can be easier to extend the peripheral device.

[0026] 传感器节点的射频模块分为对三个频段的感知与发送: [0027] I. 47MHz〜910MHzVHF/UHF频段中的TV信道的感知和发送 RF module [0026] The sensor node sensing the transmission into three bands: [0027] I. 47MHz~910MHzVHF / TV channels in the UHF band perception and transmission

[0028] 对于信号发送,将由认知节点实现DVB-H传输IP服务的传输系统。 [0028] For signal transmission, realized by the node cognitive DVB-H IP transport services delivery system. 在处理器中首先将DVB-H的服务数据封装成IP封包之后,再将其封装于传输串流TS之中,并同时加入分时切片(Time-Slicing)信息,再调变成无线信号送出。 After the first DVB-H service data is encapsulated into IP packets in a processor, which is then encapsulated in a transport stream in the TS, and while adding a slice division (Time-Slicing) information, and then transferred into a wireless signal sent . 其中将IP封包封装与串流TS之中包括发送端的多协定封装MPE (Multi-Protocol Encapsulation)、多协定封装前向纠错机制MPE-FEC与Time-Slicing机制。 Wherein the IP packet is encapsulated in the TS stream comprising transmitting side multi-protocol encapsulation MPE (Multi-Protocol Encapsulation), before multi-protocol encapsulation forward error correction MPE-FEC mechanisms and Time-Slicing mechanism. 其数据封装格式如图3所示。 Encapsulation thereof as shown in FIG.

[0029] 对于信号接收,采用电视广播接收器接收地面广播和卫星广播的数字电视信号。 [0029] For signal reception, the use of television broadcast receiver receiving terrestrial broadcast and satellite broadcast digital television signals. 接收端接收信号后需要进行反向的纠错译码动作,来获取并修复因传输所发生的数据错误。 Receiver needs to reverse the operation of the error correction decoding the reception signal, and acquires repair data due to transmission errors occurring. 在分解多协议封装(Multi-Protocol Encapsulation,MPE)格式时,本发明利用硬件方式来实现DVB-H MPE-FEC纠错机制,修复错误及还原发送的数据。 When the decomposition multiprotocol encapsulation (Multi-Protocol Encapsulation, MPE) format, with the present invention is implemented in hardware to DVB-H MPE-FEC error correction mechanism, to fix the error and restore the transmitted data. 采用BroadcomBCM2940的USB 2. O高速接口的移动电视接收器。 Using the USB 2. O BroadcomBCM2940 mobile TV receiver high-speed interface. Broadcom公司的BCM2940是单片移动数字电视接收方案,适用于DVB-T和DVB-H两种标准,因此用此接收器负责接收电视广播频段的频谱信号,解析后交给处理器进行处理。 Broadcom's BCM2940 mobile digital TV receiver is a monolithic program for DVB-T and DVB-H two standard, so using this spectrum signal receiver is responsible for receiving a television broadcast band, to the post processor parsing process.

[0030] 2. 433. 05 〜434. 79MHz 和902 〜928MHz ISM 频段的感知和发送 [0030] 2. 433. 05 ~434. 79MHz and 902 ~928MHz perception and transmission ISM band

[0031] 选用的挪威Nordic VLSI公司生产的nRF905单片射频收发芯片,其可以工作于433/868/915MHZ三个ISM(工业、科学和医学)频段,具有多个频道(最多170个以上),特别满足需要多信道工作的特殊场合。 [0031] The choice of the Norwegian company Nordic VLSI Chip RF Transceiver nRF905, which can operate at 433/868 / 915MHZ three ISM (Industrial, Scientific and Medical) band, having a plurality of channels (up to more than 170), especially to meet the needs for special occasions multichannel work. 频道之间的转换时间小于650us。 Switching time between channels is less than 650us. nRF905由频率合成器、接收解调器、功率放大器、晶体振荡器和调制器组成,不需外加滤波器。 nRF905 by the frequency synthesizer, the receiver demodulator, a power amplifier, a crystal oscillator and modulator composition, without external filter. ShockBurstTM工作模式,自动处理字头和CRC(循环冗余码校验),使用SPI接口与微控制器通信。 ShockBurstTM mode of operation, the automatic handling header and CRC (Cyclic Redundancy Check), using the SPI interface in communication with the microcontroller. 微处理器通过对此芯片编程控制可以在其可用频段内进行频谱感知与发送。 The microprocessor can be transmitted in the spectrum sensing with its available frequency bands by this chip programming control.

[0032] 3. 2. 400 〜2. 4835GHz ISM 频段(ZigBee)的感知和发送 [0032] 3. 2. 400 ~2. 4835GHz ISM band (the ZigBee) perception and transmission

[0033] 选用工作在2. 4GHz的单芯片低电压CC2420收发器。 [0033] Adopting in a low voltage CC2420 transceiver on a single chip of 2. 4GHz. CC2420是ΤΙ-Chipcon公司推出的首款符合2. 4GHz IEEE802. 15. 4标准的射频收发器,也是第一款适用于ZigBee产品的RF器件。 ΤΙ-Chipcon CC2420 is a company's first line with 2. 4GHz IEEE802. 15. 4 standard RF transceiver, is the first device for RF ZigBee products. 它基于Chipcon公司的SmartRF03技术,以0. 18 μ m CMOS工艺制成,只需极少的外部器件,性能稳定且功耗极低。 It is based on Chipcon's SmartRF03 technology to 0. 18 μ m CMOS technology made only very few external components, stable performance and low power consumption. 利用此芯片开发的无线通信设备支持数据传输速率高达250kb/s,可实现多点对多点的快速组网。 With this chip development of wireless communication device supports data rates up to 250kb / s, enabling fast multi-multipoint network. 通过在微处理器中实现它的驱动就可以控制其在相应的频段中进行频谱的感知与发送了。 It is driven by implementing in a microprocessor which can control the transmission spectrum sensing performed at the respective frequency bands.

[0034] 认知节点的软件总体结构如图2所示,主要由网络协议栈、标准接口驱动、射频模块驱动、信息处理以及上层应用相关逻辑几个模块组成。 The overall structure of the software [0034] Cognitive node shown in Figure 2, mainly by the network protocol stack, a standard interface driver, driving RF module, and the upper application-related information processing logic of several modules. 其中网络协议栈由物理层、媒体接入控制层、网络层、传输控制等协议组成。 Wherein the physical layer network protocol stack, a media access control layer, the network layer, a transport control protocol components.

[0035] 物理层负责完成无线链路能够连接,确保原始的数据可在物理媒体上完成传输;媒体接入层的主要功能是判断当前是否可以向物理层发送数据,如果可以发送需要向数据报文添加控制信息,最终将数据以及控制信息已规定的格式发送到物理层,在接收数据时MAC协议首先判断输入的信息并是否发生传输错误,如果没有错误,则去掉控制信息发送至上层;网络层的主要功能是,根据获取到的无线传感器网络拓扑信息,生成路由表,在接收到报文后根据目的地址和本地路由表对报文进行转发,完成点到点可靠传输;传输控制层,将数据报文加上必要的报文头部,包括源地址、目的地址、报文序列号、确认报文序号等传输控制信息,保证端到端的可靠传输。 [0035] The physical layer is responsible for radio link can be connected, can be done to ensure that raw data transmission on the physical medium; main function of the media access layer determines whether to transmit the data to the physical layer this can, if need be to transmit the data packets Wen addition control information, final data and transmitting control information has a predetermined format to the physical layer, when data is received MAC protocol first determines transmission error information input and has occurred, if no error, then remove the control information transmitted to the upper layer; network the main functional layer, according to the acquired topology information of the wireless sensor network, a routing table generating, upon receiving a packet before forwarding the packet according to the destination address and local routing table, reliable transmission completion point; transport control layer, the data packet with the necessary packet header, source address, destination address, the packet sequence number, acknowledgment number, etc. packet transmission control information, end to end to ensure reliable transmission.

[0036] 在网络协议栈之上是驱动程序层,每一个接口对应一个驱动程序模块,完成对该接口的读写等操作,以便从相应的射频模块读取数据。 [0036] is on the network protocol stack driver layer, each corresponding to a driver interface module to complete the read and write operations of the interface to read data from the corresponding RF module.

[0037] 信息交换处理层,负责从各个标准接口读取数据,对数据进行格式转化,对多个射频模块传来的数据进行处理,之后将处理好的数据上传给应用层进行进一步处理。 [0037] layer data exchange process, the interface is responsible for reading data from the respective standard, data format conversion, on data from the plurality of RF modules for processing, then sends the processed data uploaded to the application layer for further processing.

[0038] 图4为认知节点的一个应用示意图,其主要说明了该发明的认知节点的应用环境,图中的认知节点通过其射频模块可以对周围网络中的三个频段进行感知检测,将感知的数据交给微处理器进行处理,然后由微处理器控制在其中某个频段进行工作。 [0038] FIG. 4 is a schematic view of an application of cognitive node, which mainly described the application of the invention, the node situational awareness, cognitive node in the graph may be perceived detect three bands around the network through which the RF module the sensed data to the microprocessor for processing, controlled by a microprocessor and in which a working frequency band. 同时两个在相邻环境中的认知节点也可以进行通信相互协作完成感知。 While the two adjacent nodes cognitive environment can communicate with each other collaboratively perception.

[0039] 附加声明: [0039] Additional statement:

[0040] 以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 [0040] The above are only preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the present invention without departing from the principles of the premise, can make various improvements and modifications, such modifications and modifications should also be regarded as the protection scope of the present invention.

Claims (3)

1.用于频谱检测的认知网络节点,其特征包含以下方面: 1)认知网络节点的硬件由微处理器、射频模块、存储器、显示模块和电源模块组成,射频模块、存储器、显示模块与微处理器相连,电源模块为其它各个模块提供电源;射频模块属于微处理器的从属设备,其信号接收和发射由微处理器统一进行管理,其与微处理器通过SPI进行传输;微处理器执行部分包括任务调度、信息处理、以及网络协议栈,每个驱动模块对应一个射频模块的驱动程序,微处理器负责射频模块、显示模块、存储器和电源模块之间的任务调度,射频模块将获得的频谱信息交予微处理器进行信息处理,网络协议栈负责从各个射频模块首发数据,并将处理后的数据交给微处理器; 2)射频模块负责对频谱资源的扫描以及占用可用的频谱资源,其包括对三个频段的扫描: 2. I)授权电视 1. A network node cognitive spectrum sensing, which comprises the following features: 1) Hardware cognitive network node by the microprocessor, the RF module, a memory, a display module and a power module, a radio frequency module, a memory, a display module connected to the microprocessor, the power supply module provides power to each of the other modules; slave RF module belonging to a microprocessor, which receive and transmit signals by a microprocessor for unified management which is transmitted to the microprocessor via the SPI; microprocessing operative includes task scheduling, information processing, and the network protocol stack, each driving a driver module corresponds to the RF module, the RF module is responsible for the microprocessor, the task scheduling between the display module, a memory and a power module, the RF module the obtained spectrum information given to the microprocessor performs information processing, network protocol stack is responsible for data starting from the respective RF module, and the processed data to the microprocessor; 2) module responsible for scanning RF spectrum occupancy and available resources spectrum resources, including a scan of three bands: 2. I) authorization TV 播频段,47MHz〜910MhzVHF/UHF中的TV信道2. 2)非授权ISM 频段,433. 05MHz 〜434. 79MHz、902 〜928MHz 2. 3)非授权ISM 频段,2. 400 〜2. 4835GHz,即ZigBee 3)认知网络节点上微处理器将各个频段扫描的信息进行分析,并将结果记录下来,反馈给用户; 4)对于可扫描的频段,认知网络节点具有占用此频段的功能,并能够在不同的频段及其信道中进行切换; 5)认知网络节点具有通用接口 USB、RS232,可通过拥有上述接口的其它设备扩展到其它的频段。 TV channel broadcast band, 47MHz~910MhzVHF / UHF in 2.2) unlicensed ISM band, 433. 05MHz ~434. 79MHz, 902 ~928MHz 2. 3) unlicensed ISM band, 2. 400 ~2. 4835GHz, i.e. ZigBee 3) respective bands cognitive microprocessor scans the information on the network node is analyzed, and the results recorded feedback to the user; 4) can be scanned for the band, the network node having cognitive function in this band occupied, and It can be performed in different frequency bands and channel switching; 5) have a common interface network node cognitive USB, RS232, may be extended to other frequency bands by the above-described device possesses other interface.
2.如权利要求I所述的用于频谱检测的认知网络节点,其特征在于: 1)微处理器与射频模块之间通过串行同步通讯协议(SPI)进行连接,以完成数据交换; 2)射频模块包括以下三个部分: 2. DBroadcom BCM2940移动电视接收器用于监测TV信道的频谱资源; 2. 2) PTR8000+射频模块用于监测非授权ISM频段的频谱资源,其频段范围为433. 05MHz 〜434. 79MHz、902 〜928MHz ; 2. 3)CC2420射频模块用于监测非授权ISM频段的频谱资源,其频段范围为2. 400〜2.4835GHz ; 3)微处理器负责对射频模块进行控制,周期性的对三个频段:授权电视广播频段47MHz 〜910Mhz、非授权ISM 频段433. 05MHz 〜434. 79MHz、902 〜928MHz、非授权ISM 频段2. 400〜2. 4835GHz进行扫描; 4)在微处理器中实现了硬件接口 USB、RS232的驱动程序、数据读写程序,使得扩展射频设备接入认知网络节点后可立即进行相应频谱的扫描; 5)对于 2. Cognitive used for spectrum detection in the network node according to claim I, characterized in that: 1) the microprocessor and the RF module is connected via the serial synchronous communications protocol (the SPI), to complete the data exchange; 2) radio frequency module comprises three parts: 2. DBroadcom BCM2940 mobile television receiver for monitoring a TV channel spectrum resources; 2. 2) PTR8000 + RF module for monitoring the unlicensed ISM band spectrum resources, which frequency range is 433. . 05MHz ~434 79MHz, 902 ~928MHz; 2. 3) CC2420 RF module for monitoring the unlicensed ISM band spectrum resources, which is a frequency range 2. 400~2.4835GHz; 3) a microprocessor for controlling the RF module is responsible for periodically three bands: band television broadcast authorization 47MHz ~910Mhz, unlicensed ISM band 433. 05MHz ~434 79MHz, 902 ~928MHz, unlicensed ISM band 2. 400~2 4835GHz scanning; 4). the microprocessor is implemented in hardware interface USB, RS232 driver, the data read and write procedures, so that the access device after expansion cognitive radio network node can immediately scan the corresponding spectrum; 5) for 电视广播频段中信号的发送,认知网络节点实现了应用DVB-H标准传输IP服务的传输系统; 6)认知网络节点具有通过显示模块中的液晶屏幕将各个频段的频谱信息显示出来的功能。 Transmitting, cognitive network node television broadcast band signal to implement the transmission system application DVB-H standard IP transport services; 6) having cognitive network nodes through the display screen of the liquid crystal module will be displayed spectrum information of each band function .
3.如权利要求2所述的用于频谱检测的认知网络节点,其特征在于: I)对于三个工作频段:授权电视广播频段47MHz〜910Mhz、非授权ISM频段.433. 05MHz 〜434. 79MHz、902 〜928MHz、非授权ISM 频段2. 400 〜2. 4835GHz 进行监测主要包括以下几个方面: I. D通过对三个频段中的所有信道分别进行能量测量,生成三个频段的可用信道表,包括每个频段的可用信道数,信道评价以及信道放弃理由; .1. 2)周期执行步骤I. 1,对可用信道表进行更新,直至系统停止工作; .1.3)微处理器以一定周期对显示模块进行更新,将可用信道表的信息反馈给用户; .2)对于DVB-H传输IP服务的传输系统主要包括以下方面: .2. I)将DVB-H的服务数据封装成IP包; .2. 2)将IP封装包封装于传输串流TS之中,并同时加入分时切片(Time-Slicing)信息; .2. 3)将传输串流TS调变成无线信号发射出去。 Cognitive network node for detecting said spectrum as claimed in claim 2, wherein: the I) for the three operating bands: band television broadcast authorization 47MHz~910Mhz, unlicensed ISM band .433 05MHz ~434.. . 79MHz, 902 ~928MHz, unlicensed ISM band 2. 400 ~2 4835GHz be monitored include the following aspects: I. D through all three channels in the frequency band energy measurements were carried out, generating three bands available channel table, each band comprising a number of channels available, the channel and channel evaluation abandon reason; .1 2) cycle step I. 1, the available channel list updated until the system stops working; .1.3) microprocessor constant Periodic updating of the display module, the feedback channels available to a user table; .2) transmission system for transmitting DVB-H IP service mainly include the following: .2 I) of the DVB-H service data is encapsulated into IP. packet; .2 2) encapsulated in the IP encapsulated packet into the transport stream TS, and while adding a slice division (Time-slicing) information; .2 3) into the transport stream TS modulated radio signals emitted .
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