CN104507145A - Urban sensing network based on buses and construction method thereof - Google Patents

Abstract

The invention provides an urban sensing network based on buses and a construction method. The network comprises source sensors, target sensors, terminal sensors, data processors and servers, wherein the target sensor is located at a preset region of an urban bus station and used for forwarding acquired urban information data in the source sensor to the terminal sensor; the terminal sensor is used for forwarding the urban information data forwarded by the target sensor to the data processor; the data processor is used for processing the urban information data forwarded by the terminal sensor and sending the processed urban information data to the server; and the server is used for receiving the processed urban information data sent by the data processor and storing the urban information data in a database of the server. Through the adoption of the urban sensing network based on buses and the construction method provided by the invention, the high reliability and stability of the urban sensing network can be improved; and meanwhile, the transmission time of the data can be shortened, and the energy consumption for information transmission is reduced.

Description

Based on city sensing network and the constructing method of bus

Technical field

The present invention relates to field of network data transmission technology, particularly relate to a kind of city sensing network based on bus and constructing method.

Background technology

Along with global positioning system (Global Position System, be called for short GPS), GIS-Geographic Information System (Geographic Information System, be called for short GIS), the development fast of wireless network and microelectronic sensor, people pass through GPS, GIS, radio network technique and microelectronic sensor technology construction city sensing network, city perception is with integration, systematized mode manages the operation in city, allow the various function systems running coordinated with each other in city, for enterprise offers high-quality service and innovative space, for citizen provide quality better, variation and personalized service, the various activity in incity, city can be monitored simultaneously.

The collection of existing Mobile data is mainly consisted of two parts, is respectively and participates in perception and vehicle-mounted perception.Participation perception refers to and utilizes consumption electronic product to collect the participation aware scheme of data, although high-precision measurement data can be obtained, but be very easily subject to the impact of human factor, so be not suitable for the microstage other city sensing network of requirement high reliability, high stability, this scheme can not carry out long-term observation simultaneously.Vehicle-mounted perception is based on the sensor node be deployed on moving vehicle, utilize vehicular ad hoc network to measure multiple environmental information, although onboard sensor can be subject to the interference of human factor, but artificial disturbing factor is less, it tends to collect single information on a large scale, the randomness of vehicle and condition of road surface can cause occurring cavitation in coverage simultaneously, and therefore vehicle-mounted aware scheme is not suitable for other city sensing network of construction microstage.

Apparatus expensive in traditional monitoring scheme, the stationarity of wire transmission and wireless transmission, is not suitable for the city sensing network that construction is small, simultaneously in traditional monitoring scheme, information transmission mode, information transmission energy ezpenditure, directly affects the reliability and stability of city sensing network.

Summary of the invention

For defect of the prior art, the invention provides a kind of city sensing network based on bus and constructing method, high reliability and the stability of city sensing network can be improved, the transmission time of data can be reduced simultaneously, reduce the energy ezpenditure of information transmission.

First aspect, the invention provides a kind of city sensing network based on bus, comprising:

Multiple source transducer, sensor of interest, end sensor, data processor, server for gathering urban information data be distributed in city;

Wherein, described sensor of interest is positioned at the region that described city bus station is preset, for the urban information data retransmission extremely described end sensor will gathered in the transducer of described source;

Described end sensor is positioned at described city bus station, for the urban information data retransmission extremely described data processor forwarded by described end sensor;

Described data processor is positioned at described city bus, processes for the urban information data forwarded described end sensor, and the urban information data after process are sent to described server;

Described server receives the urban information data after the process of described data processor transmission, and is stored in the database of described server.

Further, described source transducer is the wireless senser of single antenna;

Described sensor of interest is the wireless senser of single antenna;

Described end sensor is the wireless senser of double antenna;

Described data processor is the data processor of double antenna.

Second aspect, the invention provides a kind of city sensing network constructing method based on bus, comprising:

Source transducer gathers urban information data, and described urban information data are sent to sensor of interest;

Described sensor of interest receives the described urban information data that described source transducer sends, and described urban information data are sent to end sensor;

Described end sensor receives the described urban information data that described sensor of interest sends, and described urban information data are sent to data processor;

Described data processor receives the described urban information data that described end sensor sends, and processes described urban information data, and the urban information data after process are sent to server, construction city sensing network;

Wherein, described source sensor location in city for gathering described urban information data, described sensor of interest is distributed in default region, described city bus station, and described end sensor is positioned at described city bus station, and described data processor is positioned at described city bus.

Further, described source transducer is the wireless senser of single antenna;

Source transducer gathers urban information data, and described urban information data are sent to sensor of interest, is specially:

The wireless senser of described single antenna gathers described urban information data, and described urban information data are sent to sensor of interest.

Further, described sensor of interest is the wireless senser of single antenna;

Described sensor of interest receives the described urban information data that described source transducer sends, and described urban information data are sent to end sensor, is specially:

The wireless senser of described single antenna receives the described urban information data of described source transducer transmission, and by described urban information data, adopts space division multiple access SDMA technology, described urban information data are sent to end sensor.

Further, described end sensor is the wireless senser of double antenna;

Described end sensor receives the described urban information data that described sensor of interest sends, and described urban information data are sent to data processor, is specially:

The wireless senser of described double antenna receives the described urban information data of described sensor of interest transmission, and the described urban information data that will receive, adopt SDMA technology, described urban information data are sent to described data processor.

Further, described data processor is the data processor of double antenna;

Described data processor receives the described urban information data that described end sensor sends, and processes described urban information data, and the urban information data after process are sent to server, and construction city sensing network, is specially:

The data processor of described double antenna receives the described urban information data of described end sensor transmission, to the urban information data received, adopts filtering, denoising mode, obtains the urban information data after process;

The data processor of described double antenna is by the urban information data after described process, pass through systematic communication network, be sent to described server, for construction city sensing network, urban information data after the described described process received are stored in database by described server, described server and described DataBase combining.

Further, the received power of the wireless senser of the double antenna of described end sensor meets the first default scope;

The signal to noise ratio of the wireless senser of the double antenna of described end sensor meets the second default scope.

Further, the received power of the data processor of described double antenna meets the 3rd default scope;

The signal to noise ratio of the data processor of described double antenna meets the 4th default scope.

Further, described mobile communications network comprises GPRS GPRS network.

As shown from the above technical solution, by the city sensing network based on bus provided by the invention and constructing method, wherein, city sensing network comprises: multiple source transducer, sensor of interest, end sensor, data processor, server for gathering urban information data be distributed in city; Wherein, described sensor of interest is positioned at the region that described city bus station is preset, for the urban information data retransmission extremely described end sensor will gathered in the transducer of described source; Described end sensor is positioned at described city bus station, for the urban information data retransmission extremely described data processor forwarded by described end sensor; Described data processor is positioned at described city bus, processes for the urban information data forwarded described end sensor, and the urban information data after process are sent to described server; Described server receives the urban information data after the process of described data processor transmission, and is stored in the database of described server.By the city sensing network based on bus provided by the invention and constructing method, high reliability and the stability of city sensing network can be improved, the transmission time of data can be reduced simultaneously, reduce the energy ezpenditure of information transmission.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in embodiment or description of the prior art is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

The model schematic of a kind of city sensing network based on bus that Fig. 1 provides for the embodiment of the present invention;

The another kind that Fig. 2 provides for the embodiment of the present invention is based on the structural representation of the city sensing network of bus;

The schematic flow sheet of a kind of city sensing network constructing method based on bus that Fig. 3 provides for the embodiment of the present invention;

The sensor of interest of a kind of city sensing network constructing method based on bus that Fig. 4 provides for the embodiment of the present invention is to the schematic diagram of the transmission means of end sensor;

The end sensor of a kind of city sensing network constructing method based on bus that Fig. 5 provides for the embodiment of the present invention is to the schematic diagram of the transmission means of data processor;

The another kind that Fig. 6 provides for the embodiment of the present invention compares schematic diagram based on the average transmission rate of three processes of the city sensing network constructing method of bus;

The another kind that Fig. 7 provides for the embodiment of the present invention is based on the average transmission time schematic diagram of three processes of the city sensing network constructing method of bus;

The another kind that Fig. 8 provides for the embodiment of the present invention is based on the average transmission power schematic diagram of three processes of the city sensing network constructing method of bus;

The another kind that Fig. 9 provides for the embodiment of the present invention is based on the average transmission power schematic diagram of each process of three processes of the city sensing network constructing method of bus;

The another kind that Figure 10 provides for the embodiment of the present invention is based on the average transmission time schematic diagram of each process of three processes of the city sensing network constructing method of bus.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The model schematic of a kind of city sensing network based on bus that Fig. 1 provides for the embodiment of the present invention, the another kind that Fig. 2 provides for the embodiment of the present invention is based on the structural representation of the city sensing network of bus, as illustrated in fig. 1 and 2, the city sensing network based on bus of the present embodiment is as described below.

City sensing network based on bus comprises multiple source transducer, sensor of interest, end sensor, data processor, server and database for gathering urban information data be distributed in city.

Sensor of interest is positioned at the region that city bus station is preset, for the urban information data retransmission that will gather in the transducer of source to end sensor.

For in the scope of bus station 10 meters or 5 meters in the region that bus station presets, restriction is not made to concrete scope here, make regulation according to actual situation.

End sensor is positioned at city bus station, for the urban information data retransmission that forwarded by end sensor to data processor.

Data processor is positioned at city bus, processes for the urban information data forwarded end sensor, and the urban information data after process are sent to server.

Server receives the urban information data after the process of data processor transmission, and is stored in the database of server.

Source transducer is the wireless senser of single antenna, and sensor of interest is the wireless senser of single antenna, and end sensor is the wireless senser of double antenna, and data processor is the data processor of double antenna.

The city sensing network based on bus provided by the present embodiment can effectively, dynamically be monitored the activity in city, effectively can lower the transmission delay of network simultaneously.

The schematic flow sheet of a kind of city sensing network constructing method based on bus that Fig. 3 provides for the embodiment of the present invention, as shown in Figure 3, the city sensing network constructing method based on bus of the present embodiment is as described below.

In the present embodiment, first, second etc. sequence number be not restriction to order, just distinguish for the signal to noise ratio of transducer and received power.

301, source transducer gathers urban information data, and described urban information data are sent to sensor of interest.

It should be understood that source transducer gathers urban information data, and urban information data are sent to sensor of interest.

Wherein, source transducer is the wireless senser of single antenna, source sensor location in city for gathering urban information data.

Concrete, the wireless senser of single antenna gathers urban information data, and urban information data are sent to sensor of interest.

302, described sensor of interest receives the described urban information data that described source transducer sends, and described urban information data are sent to end sensor.

It should be understood that sensor of interest receives urban information data, and urban information data are sent to end sensor.

Wherein, sensor of interest is the wireless senser of single antenna, and sensor of interest is distributed in default region, city bus station.

The region that bus station presets is the distance according to actual conditions target setting sensor distance bus station, is generally set as 10 meters or 5 meters, does not limit concrete value here.

Concrete, the wireless senser of single antenna receives the urban information data of source transducer transmission, and urban information data acquisition space division multiple access technique (the Space Division MultipleAccess that will receive, be called for short SDMA), described urban information data are sent to end sensor.

303, described end sensor receives the described urban information data that described sensor of interest sends, and described urban information data are sent to data processor.

It should be understood that end sensor receives urban information data, and urban information data are sent to data processor.

Wherein, end sensor is the wireless senser of double antenna, and end sensor is positioned at city bus station.

Concrete, the wireless senser receiving target transducer of double antenna receives urban information data, adopts space division multiple access SDMA technology, urban information data are sent to data processor.

Urban information data are sent to data processor by SDMA technology by end sensor.The received power of the transducer of the double antenna of end sensor meets the first default scope, and the signal to noise ratio of the transducer of the double antenna of end sensor meets the second default scope.

It should be understood that received power and the signal to noise ratio of the transducer of the double antenna of end sensor meet default scope, the transmission of information data can be made to translate accurately, carry out setting according to actual demand when the first scope and the second scope.

304, described data processor receives the described urban information data that described end sensor sends, and processes described urban information data, and the urban information data after process are sent to server, construction city sensing network.

It should be understood that the described urban information data that data processor receiving terminal transducer sends, and process the urban information data received, its processing mode is filtering and denoising, obtains the urban information data after process.

Urban information data after process are sent to server, for construction city sensing network by data processor.

Wherein, data processor is the data processor of double antenna, and data processor is arranged in city bus.

Concrete, the urban information data of the data processor receiving terminal transducer transmission of double antenna, process urban information data, obtain the urban information data after process;

The data processor of double antenna is by the urban information data after process, and by mobile communications network, be sent to server, the urban information data after the process received are stored in database by server, server and DataBase combining.

The received power of the data processor of the double antenna of data processor meets the 3rd default scope, and the signal to noise ratio of the data processor of the double antenna of data processor meets the 4th default scope.

Wherein, mobile communications network comprises GPRS (General Packet RadioService, be called for short GPRS) network, in the present embodiment restriction is not made to mobile communications network, as long as the network that can carry out wireless transmission can carry out the transmission of network.

The city sensing network constructing method based on bus provided by the present embodiment can improve high reliability and the stability of city sensing network, can reduce the transmission time of data simultaneously, reduces the energy ezpenditure of information transmission.

The sensor of interest of a kind of city sensing network constructing method based on bus that Fig. 4 provides for the embodiment of the present invention is to the schematic diagram of the transmission means of end sensor, the end sensor of a kind of city sensing network constructing method based on bus that Fig. 5 provides for the embodiment of the present invention is to the schematic diagram of the transmission means of data processor, the another kind that Fig. 6 provides for the embodiment of the present invention compares schematic diagram based on the average transmission rate of three processes of the city sensing network constructing method of bus, the another kind that Fig. 7 provides for the embodiment of the present invention is based on the average transmission time schematic diagram of three processes of the city sensing network constructing method of bus, the another kind that Fig. 8 provides for the embodiment of the present invention is based on the average transmission power schematic diagram of three processes of the city sensing network constructing method of bus, the another kind that Fig. 9 provides for the embodiment of the present invention is based on the average transmission power schematic diagram of each process of three processes of the city sensing network constructing method of bus, the another kind that Figure 10 provides for the embodiment of the present invention is based on the average transmission time schematic diagram of each process of three processes of the city sensing network constructing method of bus, as shown in Fig. 4 to 10, the city sensing network constructing method based on bus of the present embodiment reduces the transmission time and reduces energy ezpenditure as described below.

The sensor of interest of a kind of city sensing network constructing method based on bus that Fig. 4 provides for the embodiment of the present invention is to the schematic diagram of the transmission means of end sensor, the end sensor of a kind of city sensing network constructing method based on bus that Fig. 5 provides for the embodiment of the present invention to the schematic diagram of the transmission means of data processor, for shown in Fig. 5.

End sensor sends data x ₁and x ₂, sending data matrix X is:

$X=\left[\begin{array}{c}{x}_1\\ x_2\end{array}\right]---\left(1\right)$

H represents the Complex Channel coefficient matrix between end sensor and two reception antennas of two data processors, h ₁₁, h ₁₂, h ₂₁, h ₂₂4 parameters of channel coefficient matrix H.Channel matrix H is:

$H=\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right]---\left(2\right)$

The receiving matrix Y of two data processors is:

$Y=\left[\begin{array}{c}{y}_1\\ y_2\end{array}\right]---\left(3\right)$

Send data X to transmit by there being the channel H of noise jamming n:

$Y=H^{T}X+n={\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right]}^T\left[\begin{array}{c}{x}_1\\ x_2\end{array}\right]+n=\left[\begin{array}{c}{h}_{11}{x}_1+h_{21}{x}_2\\ h_{12}{x}_1+h_{22}{x}_2\end{array}\right]+n---\left(4\right)$

The transmission of each data flow faces the interference from other data flow, as shown in formula (4), in order to the signal Y received is mapped to a sub spaces, this subspace and an Orthogonal Subspaces being subject to other channel parameters and limiting by the interference selection matrix E between removing from the data flow of other transducers.Selection matrix E is:

$E=\left[\begin{array}{cc}{e}_{11}& e_{12}\\ e_{21}& e_{22}\end{array}\right]---\left(5\right)$

Its matrix E meets:

$\left\{\begin{array}{c}{h}_{11}{e}_{21}+h_{12}{e}_{22}=0\\ h_{21}{e}_{11}+h_{22}{e}_{12}=0\end{array}\right.---\left(6\right)$

Therefore, Received signal strength is translated into:

$\stackrel{\mathrm{\Λ}}{X}=\left[\begin{array}{c}\stackrel{\mathrm{\Λ}}{x_1}\\ \stackrel{\mathrm{\Λ}}{x_2}\end{array}\right]=\mathrm{EY}=\left[\begin{array}{c}(e_{11}{h}_{11}+e_{12}{h}_{12})x_1\\ (e_{21}{h}_{21}+e_{22}{h}_{22})x_2\end{array}\right]+\mathrm{En}---\left(7\right)$

After formula (7), interference between stream can be reached and go to zero, for the length of Received signal strength is maximum, e ₁₁direction should with h ₁₁projecting direction consistent, e ₂₂direction should with h ₂₂projecting direction consistent, now matrix E is:

$E=\left[\begin{array}{cc}{e}_{11}& e_{12}\\ e_{21}& e_{22}\end{array}\right]=\left[\begin{array}{cc}\frac{h_{22}}{\sqrt{{\left|h_{21}\right|}^2+{\left|h_{22}\right|}^2}}& \frac{-h_{21}}{\sqrt{{\left|h_{21}\right|}^2+{\left|h_{22}\right|}^2}}\\ \frac{h_{12}}{\sqrt{{\left|h_{11}\right|}^2+{\left|h_{12}\right|}^2}}& \frac{-h_{11}}{\sqrt{{\left|h_{11}\right|}^2+{\left|h_{12}\right|}^2}}\end{array}\right]---\left(8\right)$

Make simultaneously can successfully be translated, the received power of the data that two data processors receive and signal to noise ratio should meet default scope.

Meanwhile, based on the city sensing network constructing method of bus, can effectively reduce the consumption of energy, its method is as described below.

Every bit average energy consumption, is obtained by formula (9):

$P_a=\frac{7}{30}{\left(\frac{P_b}{4}\right)}^{\frac{1}{N_R{N}_T}}{N}_O\underset{i}{\overset{N_T}{\mathrm{\Σ}}}\underset{j}{\overset{N_R}{\mathrm{\Σ}}}\frac{{\left(4\mathrm{\π}\right)}^2{d}_{\mathrm{ij}}}{{\mathrm{G\λ}}^2}{M}_x{N}_f+\frac{P_c}{B}---\left(9\right)$

Wherein, N _t, N _rthe number of transmitting terminal and receiving terminal respectively, N _omonolateral noise power spectral density, G antenna gain, d _ijthe distance between node j and i, λ wavelength, M _xconnect edge, N _fbe recipient noise, B is bandwidth, P _bit is average error bit rate.When adopting binary phase shift keying modulation, P _bfor formula (10) obtains.

$P_b=\frac{1}{2}\mathrm{erfc}\left(\sqrt{\frac{E}{N_O}}\right)---\left(10\right)$

P _cthe power loss of whole circuit, P _ttransmitting power, P _rfor received power:

P _c＝N _TP _T+N _RP _R(11)

The transmission of the urban information data from source transducer to sensor of interest is divided into three phases, and the first stage is the energy ezpenditure of source transducer to this process of sensor of interest.Transmission time is:

$t_1=\frac{\mathrm{nq}}{c_1}(\mathrm{hops}-1)---\left(12\right)$

Wherein, n is the number of packet, and q is the size of packet, C ₁be channel capacity, hops is the jumping figure between source transducer to object transducer, and S is average signal power.N is average noise power, channel capacity C ₁for:

$C_1={B\log }_2(1+\frac{S}{N})---\left(13\right)$

Source transducer is to the loss E of the power of this process of sensor of interest ₁for:

E ₁＝(P _a+P _T+P _R)t ₁(14)

Second stage is the energy ezpenditure of sensor of interest to this process of end sensor, and wherein, the transmission time is:

$t_2=\frac{\mathrm{nq}}{c_2}---\left(15\right)$

Channel capacity C ₂for:

$C_2={\log }_2[1+\underset{j=1}{\overset{N_R}{\mathrm{\Σ}}}{\left|h_j\right|}^2\mathrm{\ρ}]---\left(16\right)$

Wherein, ρ is average signal-to-noise ratio, h _jfor channel coefficients sensor of interest to the power loss E2 of this process of end sensor is:

E ₂＝(P _a+P _T+N _RP _R)t ₂(17)

Phase III is the energy ezpenditure of end sensor to this process of data processor, and wherein, the transmission time is:

$t_3=\frac{\mathrm{nq}}{c_3}\left(\mathrm{\Σ}{u}_{m,i}\right)---\left(18\right)$

∑ u _m,ifor the antenna of last matching transmission is to number, channel capacity C3 is:

$C_3={\log }_2\det [I_m+\frac{\mathrm{\ρ}}{N_T}\left(H^{T}H\right)]---\left(19\right)$

m＝min(N _R，N _T)

Im is the initial value of channel, and end sensor to the power loss E3 of this process of data processor is:

E ₃＝(P _a+N _TP _T+N _RP _R)t ₃(20)

Thus obtain, the overall delay between source transducer to data processor and the loss of gross power, it is be being superposed to of three processes:

t＝t ₁+t ₂+t ₃(21)

E＝E ₁+E ₂+E ₃(22)

City sensing network constructing method based on bus is carried out to the emulation of mathematics, its parameter is for shown in table 1 simultaneously:

N _ffor recipient noise, σ ²for noise power, G is antenna gain, N _ofor monolateral noise power spectral density, M _xfor connecting edge, P _tfor transmitting power, P _rfor received power, λ is wavelength.

Table 1

Parameter	Value
		N f	10dB
σ 2	-174dBm/H z
		G	5
N O	-171dBm/H z
		M x	40dB
P T	0.0844263W
		P R	0.112497827W
λ	0.12m

The average transmission time obtained and the emulation schematic diagram of average transmission power, as shown in Fig. 6 to 10.

The city sensing network constructing method based on bus provided by the present embodiment can improve high reliability and the stability of city sensing network, can reduce the transmission time of data simultaneously, reduces the energy ezpenditure of information transmission.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in the storage medium of embodied on computer readable, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium in.

The above, be only the specific embodiment of the present invention, but; protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or substitute, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims (10)

1., based on a city sensing network for bus, it is characterized in that, comprising:

Multiple source transducer, sensor of interest, end sensor, data processor, server for gathering urban information data be distributed in city;

Wherein, described sensor of interest is positioned at the region that described city bus station is preset, for the urban information data retransmission extremely described end sensor will gathered in the transducer of described source;

Described end sensor is positioned at described city bus station, for the urban information data retransmission extremely described data processor forwarded by described end sensor;

Described data processor is positioned at described city bus, processes for the urban information data forwarded described end sensor, and the urban information data after process are sent to described server;

Described server receives the urban information data after the process of described data processor transmission, and is stored in the database of described server.

2. the city sensing network based on bus according to claim 1, is characterized in that,

Described source transducer is the wireless senser of single antenna;

Described sensor of interest is the wireless senser of single antenna;

Described end sensor is the wireless senser of double antenna;

Described data processor is the data processor of double antenna.

3., based on a city sensing network constructing method for bus, it is characterized in that, comprising:

Source transducer gathers urban information data, and described urban information data are sent to sensor of interest;

Described sensor of interest receives the described urban information data that described source transducer sends, and described urban information data are sent to end sensor;

Described end sensor receives the described urban information data that described sensor of interest sends, and described urban information data are sent to data processor;

Described data processor receives the described urban information data that described end sensor sends, and processes described urban information data, and the urban information data after process are sent to server, construction city sensing network;

Wherein, described source sensor location in city for gathering described urban information data, described sensor of interest is distributed in default region, described city bus station, and described end sensor is positioned at described city bus station, and described data processor is positioned at described city bus.

4. the city sensing network constructing method based on bus according to claim 3, is characterized in that,

Described source transducer is the wireless senser of single antenna;

Source transducer gathers urban information data, and described urban information data are sent to sensor of interest, is specially:

The wireless senser of described single antenna gathers described urban information data, and described urban information data are sent to sensor of interest.

5. the city sensing network constructing method based on bus according to claim 3, is characterized in that,

Described sensor of interest is the wireless senser of single antenna;

Described sensor of interest receives the described urban information data that described source transducer sends, and described urban information data are sent to end sensor, is specially:

The wireless senser of described single antenna receives the described urban information data of described source transducer transmission, and by described urban information data, adopts space division multiple access SDMA technology, described urban information data are sent to end sensor.

6. the city sensing network constructing method based on bus according to claim 3, is characterized in that,

Described end sensor is the wireless senser of double antenna;

Described end sensor receives the described urban information data that described sensor of interest sends, and described urban information data are sent to data processor, is specially:

The wireless senser of described double antenna receives the described urban information data of described sensor of interest transmission, and the described urban information data that will receive, adopt SDMA technology, described urban information data are sent to described data processor.

7. the city sensing network constructing method based on bus according to claim 3, is characterized in that,

Described data processor is the data processor of double antenna;

Described data processor receives the described urban information data that described end sensor sends, and processes described urban information data, and the urban information data after process are sent to server, and construction city sensing network, is specially:

The data processor of described double antenna receives the described urban information data of described end sensor transmission, to the urban information data received, adopts filtering, denoising mode, obtains the urban information data after process;

The data processor of described double antenna is by the urban information data after described process, pass through systematic communication network, be sent to described server, for construction city sensing network, urban information data after the described described process received are stored in database by described server, described server and described DataBase combining.

8. the city sensing network constructing method based on bus according to claim 6, is characterized in that,

The received power of the wireless senser of the double antenna of described end sensor meets the first default scope;

The signal to noise ratio of the wireless senser of the double antenna of described end sensor meets the second default scope.

9. the city sensing network constructing method based on bus according to claim 7, is characterized in that,

The received power of the data processor of described double antenna meets the 3rd default scope;

The signal to noise ratio of the data processor of described double antenna meets the 4th default scope.

10. the city sensing network constructing method based on bus according to claim 7, it is characterized in that, described mobile communications network comprises GPRS GPRS network.