CN103152076B - A kind of Ethernet radio network gateway based on multi input ZigBee technology - Google Patents
A kind of Ethernet radio network gateway based on multi input ZigBee technology Download PDFInfo
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- CN103152076B CN103152076B CN201310067803.4A CN201310067803A CN103152076B CN 103152076 B CN103152076 B CN 103152076B CN 201310067803 A CN201310067803 A CN 201310067803A CN 103152076 B CN103152076 B CN 103152076B
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Abstract
The present invention relates to a kind of Ethernet radio network gateway based on multi input ZigBee technology, described gateway comprises ethernet module, protocol conversion module, Zigbee module and two or more radio-frequency antenna; Two or more radio-frequency antennas described are all connected with described Zigbee module, the output of described Zigbee module is connected with described protocol conversion module, the output of described protocol conversion module is connected with described Zigbee module, and described Zigbee module is the wireless Zigbee module of multi input.The present invention is based on the Ethernet radio network gateway of multi input ZigBee technology by adopting the Zigbee wireless module of multi input, make system also can Received signal strength effectively at complex environment, and receiving sensitivity is high, the Signal reception scope of raising system, signal throughput and signal receiving quality, strengthen the impact seeing interference and wireless multi-path transmission environment.
Description
Technical field
The present invention relates to Zigbee wireless communication technology field, more particularly, relate to a kind of Ethernet radio network gateway based on multi input ZigBee technology.
Background technology
Gateway is operated in the border of two kinds or two kinds heterogeneous networks, is responsible for protocol conversion and the data retransmission of network.By the protocol conversion box packet recombination function of gateway, between the two kinds of systems making to have different communication protocol, different hardware environments, two-way communication can be realized.Along with the development of ZigBee technology, its application system gets more and more, and the demand that Zigbee network and other legacy networks (Ethernet, GPRS/GSM etc.) interconnect is day by day strong.
Zigbee is a kind of self-organizing, low-power consumption, low cost, low rate, short-range radio communication new technology, and its application is household automation, intelligent medical and Industry Control etc.The physical layer of Zigbee protocol and MAC layer adopt 802.15.4 agreement, and network layer and application layer standard have Zigbee Leagues enact.The appearance of Zigbee protocol has promoted the application of radio sensing network.
Ethernet is one of core protocol of local area network (LAN) now, and IEEE802.3 standard gives the specifications such as its physical layer line, the signal of telecommunication and media access layer.In ethernet networks, computer adopts CSMA/CD mechanism acquisition channel to communicate.Bridge, switch and router are important networked devices.Countless Ethernets accesses Internet by fire compartment wall, global computer is formed an entirety in logic.
Because Ethernet and Zigbee have different protocol specifications, the equipment in Zigbee network just cannot with devices communicating in Ethernet.Solve the communication issue of this heterogeneous network, just need protocol conversion.And the Zigbee module employing of existing Zigbee type ethernet gateway is single channel input pattern, the Zigbee module of this single channel input pattern is easy to the impact being subject to using site environment, when in the environment in relative complex, the interference and decay that are subject to external environment is had in the process that signal transmits at the scene, receiving sensitivity is low, makes the signal quality of system acceptance meeting degradation, does not even receive signal.
Summary of the invention
The object of the invention is to solve Zigbee module in prior art adopts single channel input pattern to be easily subject to the deficiency of external environment impact, a kind of Ethernet radio network gateway based on multi input ZigBee technology is provided, Zigbee module in this gateway is by adopting the mode of multichannel input, make system also can Received signal strength effectively at complex environment, and receiving sensitivity is high, improve the signal receiving quality of system.
In order to achieve the above object, the invention provides a kind of Ethernet radio network gateway based on multi input ZigBee technology, described gateway comprises ethernet module, protocol conversion module, Zigbee module and two or more radio-frequency antenna; Two or more radio-frequency antennas described are all connected with described Zigbee module, the output of described Zigbee module is connected with described protocol conversion module, the output of described protocol conversion module is connected with described Zigbee module, and described Zigbee module is the wireless Zigbee module of multi input.
According to one embodiment of present invention, the wireless Zigbee module of described multi input comprises the combiner merged for the treatment of the radio-frequency module of radiofrequency signal, the detection module carrying out layered shaping for the signal exported by described radio-frequency module, the data processing module for the treatment of each layer data exported from described detection module, the interference cancellation module being used for eliminating interference signal, the memory and being carried out by the multi-layer data in described memory that is used for each layer data after storing described data processing module process; Two or more radio-frequency antennas described are connected with described radio-frequency module respectively, and described radio-frequency module, detection module, data processing module, memory and combiner are connected successively according to signal processing flow; The output of described data processing module is connected with described interference cancellation module with described memory respectively, and the output of described interference cancellation module is connected with described detection module.
According to one embodiment of present invention, described data processing module comprises for separating of the carrier signal exported from described detection module and modulation signal and obtains the demodulator of modulation signal, for carrying out separating the decoder that the de-spreader of spread spectrum and the signal for exporting described de-spreader are decoded to wideband spread-spectrum signal; Described demodulator, de-spreader and decoder are connected successively according to signal processing flow, the output of described detection module is connected with described demodulator, the output of described decoder is connected with described interference cancellation module and described memory respectively, and the output of described interference cancellation module is connected with described detection module.
According to one embodiment of present invention, described interference cancellation module adopts the mode of iterative interference cancellation or Adaptive interference cancellation to carry out interference elimination.
According to one embodiment of present invention, described detection module comprises channel estimation module, for detecting the signal to noise ratio of the multiple signals place channel exported from described radio-frequency module.
According to one embodiment of present invention, described radio-frequency module also comprises low noise amplifier and analog to digital converter, and the signal that described radio-frequency antenna exports exports to described detection module after described low noise amplifier amplifies and analog to digital converter converts digital signal to.
According to one embodiment of present invention, described ethernet module comprises Ethernet interface and ethernet controller; The output of described ethernet controller is connected with described Ethernet interface, and the output of described protocol conversion module is connected with described ethernet controller.
According to one embodiment of present invention, described protocol conversion module comprises for the microprocessor of data processing and Data Control, for providing the power module of power supply, for the crystal oscillator unit that controls clock and Flash and SDRAM stored for data; Described power module is connected with described microprocessor respectively with the output of described crystal oscillator unit, described Flash and SDRAM is interconnected with described microprocessor respectively, the output of described microprocessor is connected with the ethernet controller in described ethernet module, and the combiner in described Zigbee module is connected with described microprocessor.
According to one embodiment of present invention, described microprocessor is ARM chip.
The present invention is relative to prior art, there is following beneficial effect: the Ethernet radio network gateway that the present invention is based on multi input ZigBee technology not only solves the Zigbee network unobstructed problem that interconnect relative to Ethernet but also passes through to adopt the wireless Zigbee module of multi input, the signal transferring to Ethernet can be transmitted by different channels simultaneously, the wireless Zigbee module of this multi input is by adopting many separate antennas, the sensitivity of this Ethernet radio network gateway Received signal strength is improved greatly, and improve the elimination ability of system to interference signal, this Ethernet radio network gateway based on multi input Zigbee wireless module can also be suitable in complex environment, solve single input pattern receive signal under complex environment as received signal quality degradation when wireless multi-path transmits, even do not receive signal, quorum sensing inhibitor sharply reduces, Received signal strength throughput or frequency spectrum obviously descend degradation problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of Ethernet radio network gateway based on multi input ZigBee technology of the present invention;
Fig. 2 is the structural representation of the embodiment of the present invention;
Fig. 3 is the structural representation of Zigbee module of the present invention;
Fig. 4 is the structural representation of Zigbee module of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Be illustrated in figure 1 the structural representation of the Ethernet radio network gateway that the present invention is based on multi input ZigBee technology, this gateway comprises ethernet module, protocol conversion module, Zigbee module and two or more radio-frequency antenna; Two or more radio-frequency antennas wherein said are all connected with described Zigbee module, the output of described Zigbee module is connected with described protocol conversion module, the output of described protocol conversion module is connected with described Zigbee module, and described Zigbee module is the wireless Zigbee module of multi input.In the embodiment of the present invention, the number of radio-frequency antenna can be 2,3 or 4 etc., can determine as the case may be, limits no longer further at this.
As shown in Figure 3, for the structural representation of the wireless Zigbee module of multi input of the present invention, the wireless Zigbee module of this multi input comprises the combiner merged for the treatment of the radio-frequency module of radiofrequency signal, the detection module carrying out layered shaping for the signal exported by radio-frequency module, the data processing module for the treatment of each layer data exported from detection module, the interference cancellation module being used for eliminating interference signal, the memory and being carried out by the multi-layer data in memory that is used for each layer data after storing data processing module process; Wherein, two or more radio-frequency antennas are connected with radio-frequency module respectively, and radio-frequency module, detection module, data processing module, memory and combiner are connected successively according to signal processing flow; The output of data processing module is connected with interference cancellation module with memory respectively, and the output of interference cancellation module is connected with detection module.
In embodiments of the invention, radio-frequency module also comprises low noise amplifier and analog to digital converter, and the signal that radio-frequency antenna exports exports to detection module after described low noise amplifier amplifies and analog to digital converter converts digital signal to.
As shown in Figure 4, in the embodiment of the present invention, data processing module comprises for separating of the signal exported from detection module and modulation signal and obtains the demodulator of modulation signal, separates the de-spreader of spread spectrum and the decoder for decoding to the signal separating spread spectrum output for carrying out wideband spread-spectrum signal; Demodulator, de-spreader and decoder are connected successively according to signal processing flow, and the output of detection module is connected with demodulator, and the output of decoder is connected with interference cancellation module with memory respectively.Embodiments of the invention, interference cancellation module is for deleting detection signal, and interference cancellation module preferentially adopts the mode of iterative interference cancellation or Adaptive interference cancellation from detection module by detection signal module elimination.
In embodiments of the invention, detection module also comprises channel estimation module, for detecting the signal to noise ratio of the multiple signals place channel exported from described radio-frequency module.This channel estimation module detects the signal to noise ratio of all signal places channel, select the channel that signal to noise ratio is maximum, and by carrying out demodulation in the signal input data processing module in this channel, separating the data processing such as spread spectrum and decoding, finally this layer data processed is stored in memory.Decoder in data processing module returns interference cancellation module after completing ground floor data processing, detection module is removed by this interference cancellation module and has been detected processed data, again circular treatment is carried out, until all data be all disposed to other layer data channel estimating module of residue and data processing module.Such as, as shown in Figure 2, the signal having three radio-frequency antennas to receive is respectively Y1, Y2 and Y3, and the reception antenna of its correspondence is respectively X1, X2 and X3, and the Principle of Antenna according to multiple-input and multiple-output can obtain channel matrix, as follows:
Wherein, launching vector is x=(x
1, x
2, x
3)
t;
Receiving vector is y=(y
1, y
2, y
3)
t,
Then y
1=x
1h
11+ x
2h
21+ x
3h
31;
y
2＝x
1h
12+x
2h
22+x
3h
32；
y
3＝x
1h
13+x
2h
23+x
3h
33，
y
1+y
2+y
3＝x
1(h
11+h
12+h
13)+x
2(h
21+h
22+h
23)+x
3(h
31+h
32+h
33)。
Y
1, y
2, y
3independently carry out after entering radio-frequency module respectively entering detection module, by channel estimation module wherein to x after low noise amplifier amplification and analog to digital converter convert digital signal to
1, x
2and x
3three kinds of signal place channels carry out signal to noise ratio estimation, and detect the channel that signal to noise ratio is maximum.In the present embodiment, if detect x
1channel (h
11, h
12, h
13)
tsignal to noise ratio maximum, then select x
1signal, and by x
1signal input data processing module, carries out demodulation, separates the data processing such as spread spectrum and decoding by data processing module, finally by the x of process
1signal storage, in memory, this completes ground floor data processing.
When completing x
1after the data processing of signal, detection module is by interference cancellation module erasure signal x
1, then pass through channel estimation module again to x
2and x
3the channel at signal place carries out signal to noise ratio estimation, and detects the channel that signal to noise ratio is maximum, in the present embodiment, if detect x
2channel (h
21, h
22, h
23)
tsignal to noise ratio maximum, then select x
2signal, and by x
2signal input data processing module, carries out demodulation, separates the data processing such as spread spectrum and decoding by data processing module, finally by the x of process
2signal storage, in memory, this completes second layer data processing.Detection module is again by interference cancellation module erasure signal x
3, and by x
3input data processing module carries out data processing, is finally stored in memory.
When data processing module completes x
1x
2and x
3data processing after, be all stored in memory, by combiner, three combined, be finally emitted in protocol converter and carry out protocol conversion, Zigbee protocol is converted to Ethernet protocol.
As shown in Figure 2, protocol conversion module of the present invention comprises for the microprocessor of data processing and Data Control, for providing the power module of power supply, for the crystal oscillator unit that controls clock and Flash and SDRAM stored for data; Power module is connected with microprocessor respectively with the output of described crystal oscillator unit, Flash and SDRAM is interconnected with microprocessor respectively, the output of microprocessor is connected with ethernet module, and the output of combiner in Zigbee module is connected with microprocessor.Microprocessor is ARM chip, preferred ARM9 family chip in the embodiment of the present invention.Ethernet module of the present invention comprises Ethernet interface and ethernet controller; The output of ethernet controller is connected with Ethernet interface, and the output of protocol conversion module is connected with ethernet controller.
In sum, the Ethernet radio network gateway that the present invention is based on multi input ZigBee technology not only solves the Zigbee network unobstructed problem that interconnect relative to Ethernet but also passes through to adopt the wireless Zigbee module of multi input, the signal transferring to Ethernet can be transmitted by different channels simultaneously, the wireless Zigbee module of this multi input is by adopting many separate antennas, the sensitivity of this Ethernet radio network gateway Received signal strength is improved greatly, and improve the elimination ability of system to interference signal, this Ethernet radio network gateway based on multi input Zigbee wireless module can also be suitable in complex environment, solve single input pattern receive signal under complex environment as received signal quality degradation when wireless multi-path transmits, even do not receive signal, quorum sensing inhibitor sharply reduces, Received signal strength throughput or frequency spectrum obviously descend degradation problem.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not run counter to Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. based on an Ethernet radio network gateway for multi input ZigBee technology, it is characterized in that, described gateway comprises ethernet module, protocol conversion module, Zigbee module and two or more radio-frequency antenna, described two or more radio-frequency antenna is all connected with described Zigbee module, the output of described Zigbee module is connected with described protocol conversion module, the output of described protocol conversion module is connected with described ethernet module, described Zigbee module is the wireless Zigbee module of multi input, described wireless Zigbee module comprises the radio-frequency module for the treatment of radiofrequency signal, signal for being exported by described radio-frequency module carries out the detection module of layered shaping, for the treatment of the data processing module of each layer data exported from described detection module, for eliminating the interference cancellation module of interference signal, for storing the memory of each layer data after described data processing module process, described two or more radio-frequency antenna is connected with described radio-frequency module respectively, described detection module comprises channel estimation module, for detecting the signal to noise ratio of the multiple signals place channel exported from described radio-frequency module, this channel estimation module detects the signal to noise ratio of all signal places channel, select the channel that signal to noise ratio is maximum, and by carrying out demodulation in the signal input data processing module in this channel, separating spread spectrum and decoding data process, finally this layer data processed is stored in memory, decoder in data processing module returns interference cancellation module after completing ground floor data processing, detection module is removed by this interference cancellation module and has been detected processed data, again circular treatment is carried out, until all data be all disposed to other layer data channel estimating module of residue and data processing module.
2. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 1, is characterized in that, the wireless Zigbee module of described multi input also comprises the combiner being carried out by the multi-layer data in described memory merging; Described radio-frequency module, detection module, data processing module, memory and combiner are connected successively according to signal processing flow; The output of described data processing module is connected with described interference cancellation module with described memory respectively, and the output of described interference cancellation module is connected with described detection module.
3. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 2, it is characterized in that, described data processing module comprises for separating of the carrier signal exported from described detection module and modulation signal and obtains the demodulator of modulation signal, for carrying out separating the decoder that the de-spreader of spread spectrum and the signal for exporting described de-spreader are decoded to wideband spread-spectrum signal; Described demodulator, de-spreader and decoder are connected successively according to signal processing flow, the output of described detection module is connected with described demodulator, the output of described decoder is connected with described interference cancellation module and described memory respectively, and the output of described interference cancellation module is connected with described detection module.
4. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 3, is characterized in that, described interference cancellation module adopts the mode of iterative interference cancellation or Adaptive interference cancellation to carry out interference and eliminates.
5. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 2, it is characterized in that, described radio-frequency module also comprises low noise amplifier and analog to digital converter, and the signal that described radio-frequency antenna exports exports to described detection module after described low noise amplifier amplifies and analog to digital converter converts digital signal to.
6. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 1, it is characterized in that, described ethernet module comprises Ethernet interface and ethernet controller; The output of described ethernet controller is connected with described Ethernet interface, and the output of described protocol conversion module is connected with described ethernet controller.
7. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 1, it is characterized in that, described protocol conversion module comprises for the microprocessor of data processing and Data Control, for providing the power module of power supply, for the crystal oscillator unit that controls clock and Flash and SDRAM stored for data; Described power module is connected with described microprocessor respectively with the output of described crystal oscillator unit, described Flash and SDRAM is interconnected with described microprocessor respectively, the output of described microprocessor is connected with the ethernet controller in described ethernet module, and the combiner in described Zigbee module is connected with described microprocessor.
8. the Ethernet radio network gateway based on multi input ZigBee technology according to claim 7, is characterized in that, described microprocessor is ARM chip.
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| CN201479157U (en) * | 2009-05-31 | 2010-05-19 | 福建师范大学 | Ethernet type ZigBee gateway device |
| CN203086465U (en) * | 2013-03-01 | 2013-07-24 | 深圳市睿海智电子科技有限公司 | Ethernet wireless gateway based on multi-input Zigbee technology |
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