CN103023571A - Light wireless networking communication system and light wireless networking communication method suitable for electricity consumption information gathering - Google Patents

Abstract

The invention discloses an optical wireless networking communication system and method suitable for collecting electricity information. The optical wireless networking includes an optical wireless baseband unit, an optical wireless radio frequency unit, and an AP terminal. The station communicates with the wireless AP terminal through the optical wireless baseband unit and the optical wireless radio frequency unit, and the optical wireless baseband unit and the optical wireless radio frequency unit communicate through optical fibers. The present invention effectively solves the "last mile" access problem of power consumption information collection through the star and chain networking methods based on the all-IP architecture among the optical wireless BBU, optical wireless RRU, and wireless AP, and helps In order to realize the requirements of "full collection, full coverage, and full cost control" of the electricity consumption information collection system. Realize remote wireless signal, and combine the structural characteristics of power lines to realize communication networking, which effectively meets the requirements of the power information collection system.

Description

An optical wireless networking communication system and method suitable for collecting electricity consumption information

technical field

The invention relates to an optical wireless hybrid networking communication system and method suitable for collecting electricity information, and belongs to the technical field of electric power system communication.

Background technique

For a long time, there has been a lack of effective means of communication for electricity consumption information collection by power users. Currently available communication methods include optical fiber private network (EPON, industrial Ethernet switch), power line carrier, wireless private network (micro-power wireless, broadband wireless), wireless public network (GPRS, CDMA, etc.), but in practical applications Among them, considering factors such as application requirements, economic cost, and practicability, there is no communication method that can effectively meet the requirements of "full collection, full coverage, and full cost control" of the electricity consumption information collection system.

The optical fiber private network has the advantages of high bandwidth and stable and reliable communication, but it needs to lay a large number of optical cables, the cost of infrastructure construction is high, and the amount of engineering is large. blind spot.

Power line carrier directly uses the existing power line to realize communication, which has the advantages of simple construction and low cost, but the communication distance is short, the rate is low, the communication success rate is difficult to guarantee, and it is difficult to obtain large-scale applications.

Micro-power wireless (ZigBee, WiFi, etc.) technology is simple, flexible and convenient to install, low cost, and flexible networking, but the bandwidth is low, the communication distance is short, and the communication effect is greatly affected by factors such as building occlusion and weather conditions, so it is difficult to popularize .

Broadband wireless (McWill, LTE230M, etc.) adopts 3G and 4G communication technologies, which have the advantages of high communication speed and long distance, but need to erect high antennas, which makes site selection difficult and construction difficult. At the same time, broadband wireless is affected by regions and buildings. There are still many blind spots, and it is difficult to achieve full coverage.

Based on the above analysis, the current power system still has to rely on the wireless public network to collect electricity consumption information, but the wireless public network requires a lot of operating expenses, and lacks guarantees in terms of reliability and information security, making it difficult to meet the needs of intelligent electricity demand.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a combination of the advantages of optical fiber EPON and broadband wireless communication, and utilize the EPON network to separate the traditional wireless base station into two parts, a baseband unit and a radio frequency unit, to realize wireless signal transmission. The optical and wireless hybrid networking communication method suitable for power consumption information collection is realized by combining the structural characteristics of the power consumption line, and effectively meeting the requirements of the power consumption information collection system.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

An optical wireless networking method applicable to the collection of electricity information, which adopts optical wireless networking for communication; it is characterized in that the optical wireless networking includes an optical wireless baseband unit, an optical wireless radio frequency unit, a wireless AP terminal; the optical wireless baseband unit is formed by the fusion of the baseband unit and the optical line terminal, and the optical wireless radio frequency unit is formed by the fusion of the radio frequency unit and the optical node; the method is: the power consumption information is collected using the optical wireless baseband The unit and the optical wireless radio frequency unit communicate with the wireless AP terminal.

The above-mentioned method for communicating with a wireless AP terminal includes: a signal transmitting step and a signal receiving step;

Another object of the present invention is to provide an optical wireless networking communication system suitable for collecting electricity information, which includes: a master station for collecting electricity information and optical wireless networking; it is characterized in that the optical wireless networking includes optical wireless A baseband unit, an optical wireless radio frequency unit, and an AP terminal. The main station for collecting power consumption information communicates with the wireless AP terminal through the optical wireless baseband unit and the optical wireless radio frequency unit. The optical wireless baseband unit communicates with the optical wireless radio frequency unit through an optical fiber.

The optical wireless baseband unit includes a baseband processor, a first duplex filter connected to the baseband processor, a first frequency converter connected to the first duplex filter, a first converter, a first signal processing unit, and Optical line terminal; the optical wireless radio frequency unit includes an optical node, a second signal processing unit connected to the optical node, a second converter, a second duplex filter, a receiving antenna connected to the second duplex filter, and a first Two frequency converters; the first converter and the second converter are respectively connected to the first frequency converter and the second frequency converter; the optical node is connected to an optical line terminal through an optical fiber.

Both the first frequency converter and the second frequency converter include an up-converter and a down-converter, the converter includes an A/D converter and a D/A converter, and the A/D converter and the D/A converter connected to the up-converter and down-converter, respectively.

Preferably, the optical wireless baseband unit is arranged in a substation, and the optical wireless radio frequency unit is arranged in a station area. the

Preferably, the optical wireless baseband unit and the optical wireless radio frequency unit are networked in star form according to the power line.

Preferably, the optical wireless baseband unit and the optical wireless radio frequency unit are networked in a chain manner by using an optical splitter to split light step by step.

The present invention separates the baseband unit and the radio frequency unit of the wireless base station equipment through the optical wireless technology, reducing the volume of the base station equipment; the baseband unit and the radio frequency unit communicate through optical fibers, and the radio frequency units can be effectively distributed by means of an optical fiber network layout to expand the wireless coverage. In the power consumption information collection system, optical wireless networking mainly includes star networking and chain networking.

The networking mode disclosed by the invention adopts an all-IP architecture, and the optical wireless BBU, the optical wireless RRU, and the wireless AP all support IP mode access, which improves the transparency of the network and is beneficial to network management and fault diagnosis. Through the EPON and wireless integration and networking method provided by the present invention, a reliable channel is provided for the power consumption information collection communication system, and the "last mile" coverage problem of power consumption information collection is effectively solved. It is helpful to realize the requirements of "full collection, full coverage, and full cost control" of the electricity consumption information collection system.

the

Description of drawings

The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment;

Figure 1 is a structural block diagram of the optical wireless networking communication system suitable for collecting electricity information of the present invention;

Fig. 2 is a star power circuit diagram of an embodiment of the present invention.

FIG. 3 is a network diagram of a star structure communication network according to an embodiment of the present invention.

Fig. 4 is a chain power circuit diagram of another embodiment of the present invention.

FIG. 5 is a communication network diagram of a chain structure according to another embodiment of the present invention.

Figure 6 is a specific 35kV substation power distribution circuit diagram;

FIG. 7 is a network communication diagram of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

As shown in Figure 1, a kind of optical wireless networking method applicable to the collection of electricity consumption information of the present invention, it adopts optical wireless networking to carry out communication on the collection of electricity consumption information; The optical wireless networking includes an optical wireless baseband unit ( BBU) and optical wireless base radio unit (RRU), BBU and OLT (optical line terminal, optical line terminal) are fused to form optical wireless BBU, RRU and ONU (Optical Network Unit, optical node) are fused to form optical wireless RRU . The method is that the electrical information is collected using an optical wireless BBU and an optical wireless RRU for communication.

In order to realize the above method, it adopts an optical wireless networking communication system suitable for power consumption information collection, including a power consumption information collection master station and an optical wireless networking; wherein, the optical wireless networking includes an optical wireless BBU, an optical wireless The RRU and the AP terminal, the master station for collecting power consumption information communicates with the wireless AP terminal through the optical wireless BBU and the optical wireless RRU. The optical wireless BBU of this embodiment includes a baseband processor, a first duplex filter connected to the baseband processor, a first frequency converter connected to the first duplex filter, a first converter, and a first signal processing unit and an OLT; the first signal processing unit is connected to the first converter and the OLT respectively.

Optical wireless radio frequency unit comprises ONU, the second signal processing unit that is connected with ONU, the second converter, the second duplex filter and receiving antenna and the second frequency converter; The receiving antenna and the second frequency converter are all connected with the second dual The industrial filter is connected, and the first converter and the second converter are respectively connected with the first frequency converter and the second frequency converter; wherein, the first frequency converter and the second frequency converter both include an up-converter and a down-converter, The converter includes an A/D converter and a D/A converter, and the A/D converter and the D/A converter are respectively connected with an up-converter and a down-converter. The ONU of the present invention is connected with the OLT through the optical fiber, and it separates the optical wireless baseband unit and the optical wireless radio frequency unit of the wireless base station equipment through the optical wireless technology, which reduces the volume of the base station equipment; the optical wireless baseband unit and the optical wireless radio frequency unit Through optical fiber communication, the radio frequency units can be distributed effectively with the help of optical fiber network to expand the wireless coverage.

It is worth mentioning that, in the above-mentioned optical wireless networking method, the implementation method of its communication includes a signal transmitting step and a signal receiving step; wherein, the signal transmitting process is: the baseband signal passed through the baseband processor is filtered by the first duplex filter Afterwards, it is converted into an intermediate frequency signal by up-conversion, and then converted into a digital signal by A/D conversion. The digital signal is processed by the first signal processing unit for parallel-serial conversion, error correction, framing, etc., and converted into a data stream in Ethernet packet format. , transmitted to the remote end through the OLT; after the remote ONU receives it, the data stream is processed by the second signal processing unit for serial-to-parallel conversion, error correction, etc., and is restored to a digital signal for D/A conversion. After the conversion is completed, it is restored to an intermediate frequency signal. After being up-converted and modulated into a radio frequency signal, the radio frequency signal is transmitted after being processed by signal amplification and filtering by a second duplex filter.

The signal receiving process is as follows: Contrary to the signal transmitting process, the received radio frequency signal is pre-amplified after being filtered by the second duplex filter, and then modulated into an intermediate frequency signal through down conversion, and the intermediate frequency signal is converted into The digital signal is then processed by the second signal processing unit for parallel-serial conversion, error correction, framing, etc., and converted into a data stream in Ethernet packet format, which is transmitted to the central office through the ONU; after the OLT at the central office receives it, the data stream passes through the first The signal processing unit performs serial-to-parallel conversion, error correction and other processing, and converts it into a digital signal for D/A conversion. After the conversion is completed, it is restored to an intermediate frequency signal, and then modulated into a baseband signal by down-conversion, and then transmitted to the baseband after being processed by the first filter. The processor completes the signal receiving process.

In order to better illustrate the present invention, two ways of star networking and chain networking of optical wireless networking are illustrated as follows;

In the power consumption information collection system, optical wireless networking includes star networking and chain networking, as shown in Figure 2 and Figure 3, the star networking structure is suitable for establishing multiple power lines in substations Wireless coverage, the optical wireless BBU is located in the substation, the optical wireless RRU is located in the station area to be monitored, and the AP is the wireless terminal access point, which can be connected to the power terminal through a data line by an independent device, or can be integrated in a power terminal using a standard module. Among the terminals, the networking is shown in Figure 3. The characteristic of this networking method is that the BBU and different RRUs are directly connected through multiple optical fibers, the networking is simple, the expansion is convenient, the signal passes through fewer links, and the line reliability is high. The disadvantage is that the connection between the BBU and the RRU requires Occupies multiple fiber cores.

As shown in Figure 4 and Figure 5, the chain-type network structure is suitable for monitoring multiple radio stations on a power line. The optical wireless BBU is located in the substation, the optical wireless RRU is located in the station area to be monitored and its surrounding areas, and the AP is The wireless terminal access point can use an independent device to connect to the power terminal through a data line, or can use a standard module to be integrated in the power terminal. The network is shown in Figure 5. The characteristic of this networking method is that the BBU and different RRUs are connected through an optical fiber, and the optical splitter splits the light step by step, occupying a small number of fiber cores. The disadvantage is that the reliability of the line decreases step by step as the number of splits increases.

Fig. 6 is a specific distribution circuit diagram of a 35kV substation, which includes two distribution lines 582 and 583, and each line has two stations. In this network, the optical cable has covered the main line and reached the vicinity of the station area, but it has not covered all the power terminals in the station area. It is necessary to use wireless communication for extended coverage. Therefore, it is the best choice to use optical wireless communication to form a network. .

Fig. 7 is a network diagram of optical wireless communication for the above line. The optical wireless BBU integrates the functions of OLT and wireless baseband unit. It is located in the substation. The uplink direction is connected to the backbone transmission equipment and connected to the master station for collecting electricity information. , so there is no need to erect an RF antenna. The optical wireless RRU integrates the functions of the ONU and the wireless radio frequency unit. It is located in a place where the optical cable is near the radio station. The downlink direction uses the optical port to directly connect to the fiber channel to realize communication with the optical wireless BBU. The downlink direction uses the radio frequency antenna to communicate with the wireless AP. communication. The optical wireless RRU needs to send and receive radio frequency signals, so a radio frequency antenna needs to be erected, and the height of the antenna is proportional to the required coverage area. The wireless AP is located at the power consumption terminal that needs to realize the collection of power consumption information. According to the needs, it can be an independent wireless communication device, or it can be a communication module to realize the integration with the power consumption terminal. The uplink direction of the wireless AP communicates with the optical wireless RRU through wireless, and the downlink direction communicates with the power-consuming terminal through the data line.

In addition to the above-mentioned embodiments, the present invention is also applicable to other chain-type and star-type derived networking modes. All technical solutions in the form of equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Based on the above, the present invention separates the baseband unit and the radio frequency unit of the wireless base station equipment through optical wireless technology, reducing the volume of the base station equipment; the baseband unit and the radio frequency unit communicate through optical fibers, and the radio frequency unit can be effectively controlled by the optical fiber network. Distributed layout to expand wireless coverage. And the networking method adopts the all-IP architecture, and the optical wireless BBU, optical wireless RRU, and wireless AP all support IP access, which improves the transparency of the network and is conducive to network management and fault diagnosis. Through the EPON and wireless integration and networking method provided by the present invention, a reliable channel is provided for the power consumption information collection communication system, and the "last mile" coverage problem of power consumption information collection is effectively solved.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. one kind is applicable to the light wireless networking communication system that power information gathers, and comprises that power information gathers main website and light wireless networking; It is characterized in that, described smooth wireless networking comprises light radio base band unit, light radio frequency units and AP terminal, described power information gathers main website and communicates by light radio base band unit and light radio frequency units and wireless aps terminal, between described smooth radio base band unit and the light radio frequency units by optical fiber communication.

2. a kind of light wireless networking communication system that power information gathers that is applicable to according to claim 1 is characterized in that, described smooth radio base band unit and light radio frequency units according to power circuit with star-like mode networking.

3. a kind of light wireless networking communication system that power information gathers that is applicable to according to claim 1 is characterized in that, described smooth radio base band unit and light radio frequency units employing optical splitter step by step light splitting with the networking of chain mode.

4. according to claim 1 to the described a kind of light wireless networking communication system that power information gathers that is applicable to of 3 any one, it is characterized in that, described smooth radio base band unit be connected baseband processor, the first duplexer filter that is connected with baseband processor, the first frequency converter that is connected with the first duplexer filter, the first transducer, first signal processing unit and optical line terminal; Described first signal processing unit connects respectively the first transducer and optical line terminal;

Secondary signal processing unit, the second transducer, the second duplexer filter and the reception antenna that is connected with the second duplexer filter and the second frequency converter that described smooth radio frequency units comprises optical node, is connected with optical node;

Described the first transducer, the second transducer respectively with the first frequency converter be connected frequency converter and be connected; Described optical node is connected with optical line terminal by optical fiber.

5. a kind of light wireless networking communication system that power information gathers that is applicable to according to claim 4, it is characterized in that, described the first frequency converter and the second frequency converter include upconverter and low-converter, described transducer comprises A/D converter and D/A converter, and described A/D converter is connected with low-converter with upconverter respectively with D/A converter.

6. one kind is applicable to the light wireless networking method that power information gathers, and adopts the light wireless networking to communicate to the power information collection; It is characterized in that described smooth wireless networking comprises light radio base band unit, light radio frequency units, wireless aps terminal; Described smooth radio base band unit is to be merged by Base Band Unit and optical line terminal to form, and described smooth radio frequency units is to be merged by radio frequency unit and optical node to form; Its method is: the power information collection adopts light radio base band unit and light radio frequency units and wireless aps terminal to communicate.

7. smooth wireless networking method according to claim 6 is characterized in that, described smooth radio base band unit is arranged on transformer station, and described smooth radio frequency units is arranged on uses radio area.

8. smooth wireless networking method according to claim 7 is characterized in that, described smooth radio base band unit and light radio frequency units according to power circuit with star-like mode networking.

9. smooth wireless networking method according to claim 7 is characterized in that, described smooth radio base band unit and light radio frequency units adopt optical splitter step by step light splitting with the networking of chain mode.

10. according to claim 6 to the described smooth wireless networking method of 9 any one, wherein, the above-mentioned method that communicates with the wireless aps terminal comprises: signal step of transmitting and signal receiving step;

Described signal step of transmitting is: at first baseband signal is by after the duplexer filter filtering, change intermediate-freuqncy signal into through up-conversion, be digital signal through the A/D transitions again, digital signal is carried out parallel-serial conversion, error correction, framing processing through the first signal processing unit, changes the data flow of ether packet format into; Then be transferred to far-end by optical line terminal; After the optical node of far-end receives, data flow process secondary signal processing unit string and conversion, correction process, be reduced to digital signal and carry out the D/A conversion, be reduced to intermediate-freuqncy signal after converting, be modulated to radiofrequency signal through up-conversion again, emission of radio frequency signals after processing through signal amplification, the first duplexer filter filtering;

Described signal receiving step is: the radiofrequency signal that receives, by carrying out first preposition amplification after the second duplexer filter filtering, be modulated to intermediate-freuqncy signal through down-conversion again, intermediate-freuqncy signal is digital signal through the A/D transitions, carry out parallel-serial conversion, error correction, framing processing through the secondary signal processing unit again, change the data flow of ether packet format into, be transferred to local side by optical node; After the optical line terminal of local side receives, data flow process first signal processing unit string and conversion, correction process, change digital signal into and carry out the D/A conversion, be reduced to intermediate-freuqncy signal after converting, be modulated to baseband signal through down-conversion once again, and after the first filter process, send baseband processor to, the settling signal receiving course.

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