TW201918110A - Street light apparatus - Google Patents

Abstract

A street light apparatus, which includes a lamp post and a illumination body, is provided. The illumination body includes a main body, lighting units, a first antenna communication module and a second antenna communication module. The main body is disposed at the top of the lamp post. The lighting units is disposed at the main body. The first and second antenna communication modules are disposed at the main body, and both include directional antenna structures with radiation pattern downward to the floor. The communication technique supported by the first antenna communication module is different from the second antenna communication technique. The signal coverage ranges of the first and second antenna communication modules are almost the same. Accordingly, it's easy to use high transmission rate outside, and the street light apparatus can share loading of the original base stations.

Description

Street light device

The present invention relates to a lighting device, and more particularly to a street light device incorporating a network function.

Street lamps are lighting equipment used by other government units such as roads, streets, parks, etc. People can be seen at any time on the road. General street lights are usually used to provide illumination to prevent accidents and criminal acts at night. Some street lights even have closed-circuit cameras to help the police monitor or record the scene. It can be seen that the geographical advantage of the street lamp will help to integrate other functions.

In view of the above, the present invention provides a street light device, which is provided with an antenna communication module supporting two communication technologies, and provides multiple network services for a specific range of areas, so that people can still have a better network service experience outside the public. .

The street lamp device of the present invention comprises a lamp post and an illuminating body. The illuminating body comprises a body, a lighting unit, a first antenna communication module and a second antenna communication module. The body is arranged at the top of the lamp post. The light emitting unit is disposed on the body. The first antenna communication module is disposed on the body and has a directional antenna structure with a radiation field type facing downward of the body. The second antenna communication module is disposed on the body and has a directional antenna structure with a radiation field type facing downward of the body. The communication technology supported by the second antenna communication module is different from that of the first antenna communication module, and the signals coverage of the first antenna communication module and the second antenna communication module are substantially equal.

In an embodiment of the invention, the first antenna communication module supports mobile communication technology, and the second antenna communication module supports Wireless Local Area Network (WLAN) technology.

In an embodiment of the invention, the mobile communication technology is Long Term Evolution (LTE), and the wireless local area network technology is Wi-Fi, so that the first antenna communication module and the second antenna communicate. Both modules are compliant with the Long Term Evolution (LTE-WLAN Aggregation, LWA) specification.

In an embodiment of the invention, the horizontal signal coverage of the first antenna communication module and the second antenna communication module is substantially in the range of a radius of 50 meters outward from the lamp post.

In an embodiment of the invention, the lamp post is spaced apart from the lamp post of the other street lamp device by more than 100 meters, and the signal coverage range of the first antenna communication module is used as the basis for the spacing between the two lamp posts, and The difference between the signal coverage range of the first antenna communication module and the second antenna communication module is minimized.

In an embodiment of the invention, the first antenna communication module and the second antenna communication module are separated by more than one-half of a wavelength, and the light-emitting units are disposed on the first antenna communication module and the second antenna. Between communication modules.

In an embodiment of the invention, the street lamp device further includes two receiving boxes disposed on the lamp post, and each has a main body, and the cover member is movably disposed on the main body. The main body houses the receiving device of the first antenna communication module or the second antenna communication module, and the cover shields the opening of the main body.

In an embodiment of the invention, the first antenna communication module and the second antenna communication module respectively have a signal feeding line, and the lamp post accommodates the RF coaxial cable to connect the signal feeding line.

In an embodiment of the invention, the street lamp device further includes a third antenna communication module disposed on the body and having a directional antenna structure with a radiation field type facing downward of the body. The third antenna communication module supports the same communication technology as the first antenna communication module, and the third antenna communication module and the first antenna communication module support different frequency bands, and the first antenna communication module and the third antenna The signal coverage of the antenna communication module is roughly equal.

In an embodiment of the invention, the first antenna communication module includes an antenna body, a signal feeding line, a cover, and a metal reflector. The signal feed line is connected to the antenna body. The cover houses the antenna body and is assembled for the signal feed line. The metal reflector is disposed on one side of the antenna body.

Based on the above, the embodiment of the present invention integrates a communication device into a street lamp, and provides network services for a specific range, and combines the advantages of high-speed transmission of the LWA, so that the high-speed Internet service can be easily enjoyed by the public, and the telecommunication operator can also pass the street lamp device. To share the load of the existing base station.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic view of a street light device 1 in accordance with an embodiment of the present invention. Referring to FIG. 1 , the street light device 1 includes an illuminating body 11 , a lamp post 12 , and two receiving boxes 13 . The street light device 1 can be installed in an environment such as a road, a street, a square, a park, etc., and the present invention is not limited thereto.

Referring to FIG. 3A, the illuminating body 11 includes a body 111, five light emitting units 112, antenna communication modules 113, 115, 116, 117 and a metal outer panel 114. The light emitting unit 112 and the antenna communication modules 113, 115, 116, and 117 can be accommodated in the body 111. The illumination unit 112 can be an illumination or an electric lamp of the type such as a light emitting diode (LED), a sodium lamp, a mercury lamp, etc., and in this embodiment, an LED light source is used, which is better in power consumption, brightness and volume than other types of electric lamps. In addition, each of the light emitting units 112 is modularly mounted on the outer panel 114 to facilitate modification, repair, or replacement by a construction worker. It should be noted that the number and location of the light emitting units 112 can be adjusted according to the needs.

The antenna communication module 113 supports Wi-Fi 2.4 gigahertz (GHz) antenna modules, the antenna communication module 116 supports Wi-Fi 5 GHz antenna modules, and the antenna communication module 115 supports LTE 1800 MHz. The (MHz) antenna module, and the antenna communication module 117 supports the LTE 2600MHz antenna module, which is compatible with the Long Term Evolution-Wireless Area Network Aggregation (LWA) specification in combination with Wi-Fi and LTE technologies. The antenna communication modules 113, 116 are separated from the antenna communication modules 115, 117 by more than one-half of the wavelength, and are disposed between the two sets of antenna communication modules by the illumination unit 112 to reduce interference between the two communication technologies. The antenna communication modules 113, 115, 116, 117 form a 2 x 2 multiple input multiple output (MIMO) antenna system, and each has a directional antenna structure with a radiation field type facing below (ground) of the body 111. The antenna field type radiates from top to bottom, and its gain G _t distribution decreases rapidly with both sides of the main beam, so that the signal intensity in the coverage range is also rapidly attenuated with increasing distance, and it is easy to limit the specific cell service range, so that it is suitable for high Density / high capacity field. The Wi-Fi antenna communication modules 113, 116 of the present embodiment have the same projection field characteristics as the LTE antenna communication modules 115, 117, and are suitable for heterogeneous network integration, so that the LTE and Wi-Fi carriers are more easily reachable within the coverage range. Polymerization efficiency.

The signals coverage of the Wi-Fi antenna communication modules 113, 116 and the LTE antenna communication modules 115, 117 are substantially equal, and the signal coverage of the antenna communication modules 113, 116 is approximately 50 meters outward from the lamp post 12 The range of the radius r1 is such that the received signal strength is approximately -70 dBm (dBm); and the signal coverage of the antenna communication modules 115, 117 is approximately the range of the outer distance of the lamp post 12 being the radius r2, so that the received signal strength It is approximately -95 dBm. In this way, the mobile devices (for example, mobile phones, tablets, notebooks, etc.) located below can transmit at a transmission rate of more than 400 Mbps through the LWA communication technology, but the actual data may vary depending on the environment or specifications.

It is worth noting that the field distribution of the operating frequency bands of each antenna communication module is specially adjusted. It can compensate for the difference in propagation path loss caused by the frequency difference at the receiving end, so that the difference in the heterogeneous network signal strength between the LTE and Wi-Fi antenna communication modules in the signal coverage is minimized, thereby improving the LWA aggregation at the receiving end. opportunity. More specifically, according to the Friis Transmission Equation ( ,among them Is the receiving power, Is the transmitter power, Is the transmitter antenna gain, PL is the path loss ( (free space), R is the distance between the receiving end and the transmitting end, F is the operating frequency), Is the receiver antenna gain). If the projected antenna field type is used, the characteristics of the field-type main beam are rapidly decremented. When the receiving end is gradually away from the transmitting end, the signal strength of the receiving end is attenuated and will be dominated by the distance R and the gain G _t at the same time. The ability to quickly limit the coverage. For example, for every 1× increase in distance, the received signal strength will be 6 dB less, and the distance will increase, and the direct view propagation corresponds to the gain G _t being smaller. Assuming that the distance between the transmitting end and the receiving end is constant, the operating frequency vs. PL difference is as follows: It can be seen that the path loss of different operating frequencies has its difference. In addition, when the sensitivity requirements of the two heterogeneous networks are different for the receiving end, if the difference between the two is minimized, the field distribution can be Adjustments, such as the use of narrower beam antennas in the LTE band, will increase the chances of the receivers in the same coverage performing LWA.

Referring to FIG. 3B and FIG. 3C , the antenna structure is illustrated by taking the antenna communication module 113 as an example, and the rest can be referred to. The antenna communication module 113 includes an antenna body 211, two signal feed lines 212, a cover 213, and a metal reflector 214. The antenna body 211 includes a radiant panel 2111, a power splitter 2112 is located above the radiant panel, and an insulating material spacer 2113 is disposed between the radiant panel 2111 and the power splitter 2112 to separate the radiant panel 2111 from the power splitter 2112 by a specific distance. (for example, 5, 10 mm, etc.). The power dividing board 2112 is connected to the two signal feeding lines 212, and the signal feeding line 212 is assembled on the outer cover 213. In addition, the metal reflector 214 is mounted on the back of the antenna body 211 to reduce interference caused by back waves. In addition, the antenna communication modules 113, 115, 116, 117 are modularly mounted on the outer panel 114 to facilitate modification, repair or replacement by the constructor.

It should be noted that the antenna communication modules 113, 115, 116, and 117 may be omnidirectional field-type distributions, but the signal coverage range must be limited within a certain distance of the street lamp device 1, and the communication modules of the antennas are evenly distributed. Distribution, which effectively improves the signal-to-noise ratio (SNR) and improves the quality of user experience (QoE). In addition, in other embodiments, the antenna communication modules 113, 116 may also support other wireless network technologies (eg, ZigBee, Bluetooth, etc.), and the antenna communication modules 114, 117 may also support other frequency bands (eg, 700). , 900 MHz, etc. or other mobile communication technologies (eg, third generation (3G) mobile communications, WiMAX, etc.), (thus, antenna communication modules 113, 116, 114, 117 can integrate different communication technologies according to requirements).

Referring to Figures 1, 2, and 4, the lamp post 12 is erected on the ground, and the illuminating body 11 is disposed at the top end thereof, and the RF coaxial cable 121 is received to connect the signal feeds of the antenna communication modules 113, 114, 116, and 117. Into the line 212, the wire is not exposed, not only enhance the appearance but also prevent external damage.

Referring to FIGS. 1 and 4, the two receiving boxes 13 are disposed at the bottom end of the lamp post 12, and respectively have a main body 133, and the cover member 134 is movably disposed on the main body 133 (upper type). The main body 133 houses the receiving devices of the antenna communication modules 113, 114, 116, and 117 (i.e., the Wi-Fi access point (AP) device 131 and the micro base station device 132). The cover member 134 shields the opening of the main body 133 and can be designed as a seat or other landscaping shape, which can be used for the public to sit down and the maintenance personnel can easily open to repair or update the internal parts.

The street light device 1 of the present embodiment can be used as a small cell (Small Cell) to share the load of the existing base station with the power supplier. Therefore, the traffic capacity can be expanded in a crowded environment. In order to improve the signal coverage, please refer to FIG. 5, the lamp posts 12 of the two-lamp device 1A, 1B are separated by a specific distance R, which is about 100 meters, but more than 100 meters. Due to the limitation of the projection field strength, the overlapping interference of adjacent cells can be reduced, and the aforementioned spacing R can be reduced to achieve the purpose of expanding the network capacity.

Please refer to FIG. 6 for an example of deploying a street light device 1. The coverage strength of LTE's -95dBm coverage is the criterion for the coverage (ie, the coverage of LTE's -95dBm is the coverage of each point): 1. If the coverage of -95dBm can be more limited, it means that it is at a high capacity / The high-density field covers a reduction in overlapping areas and can build more LTE networks. 2. If the LTE coverage strength (-95dBm) and the Wi-Fi coverage strength (-70dBm) range are minimized (closer), the chances of the user device performing LWA will increase significantly.

In summary, the street light device of the embodiment of the present invention uses a low power consumption light emitting unit, and combines the directional antenna communication module surrounding the light emitting unit, so that both can function normally without hindering the operation of the other party. The pick-up device is also placed in the storage box of the seat shape, which increases the convenience of equipment maintenance and erection. The antenna communication module and the receiving device are connected by using a low-loss RF wire, and the RF wire is placed inside the lamp post so that the wire is not exposed. In addition, the street light device can integrate the heterogeneous network, so that the receivers in a certain range can use the LWA, and further adjust the field distribution of each antenna communication module, which will minimize the difference in signal coverage of the two heterogeneous networks. Maximize the chances of executing LWA. In this way, people can easily enjoy high-speed Internet access outside, and telecom operators can share the load of existing base stations through street lighting devices.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

1, 1A, 1B‧‧‧ street light installation

11‧‧‧ illuminating body

111‧‧‧Ontology

112‧‧‧Lighting unit

113, 115, 116, 117‧‧‧ antenna communication module

114‧‧‧Outer panel

12‧‧‧ lamppost

121‧‧‧RF coaxial cable

13‧‧‧ Containment box

131‧‧‧Wi-Fi AP equipment

132‧‧‧Micro base station equipment

133‧‧‧ Subject

134‧‧‧Cleaning pieces

211‧‧‧Antenna body

2111‧‧‧radiation board

2112‧‧‧Power board

2113‧‧‧Isolation column

212‧‧‧Feeding line

213‧‧‧ Cover

214‧‧‧Metal reflector

R1, r2‧‧‧ radius

R‧‧‧ spacing

‧‧‧Field distribution

1 is a schematic view of a street light device in accordance with an embodiment of the present invention. 2 is a partial schematic view of a street light device in accordance with an embodiment of the present invention. 3A is a schematic view of an illuminating body in accordance with an embodiment of the present invention. FIG. 3B is a schematic diagram of an antenna communication module according to an embodiment of the invention. 3C is another perspective view of an antenna communication module according to an embodiment of the invention. 4 is a partial schematic view of a street light device in accordance with an embodiment of the present invention. FIG. 5 is a schematic view showing the arrangement of a two-lamp device according to an embodiment of the invention. Figure 6 is an example of a street light installation.

Claims (10)

A street lamp device comprising: a lamp post; and an illuminating body, comprising: a body disposed at a top end of the lamp post; a plurality of light emitting units disposed on the body; a first antenna communication module disposed on the body And having a first directional antenna structure with a radiation field pattern facing the body; and a second antenna communication module disposed on the body and having a second directional antenna structure with a radiation field pattern facing the body The communication technology supported by the second antenna communication module is different from the first antenna communication module, and the signals coverage of the first antenna communication module and the second antenna communication module are substantially equal. The street light device of claim 1, wherein the first antenna communication module supports a mobile communication technology, and the second antenna communication module supports a wireless local area network (Wireless Local Area Network) , WLAN) technology. The street light device of claim 2, wherein the mobile communication technology is Long Term Evolution (LTE), and the wireless local area network technology is Wi-Fi, so that the first antenna communication module And the second antenna communication module conforms to the LTE-WLAN Aggregation (LWA) specification. The street light device of claim 1, wherein the horizontal signal coverage of the first antenna communication module and the second antenna communication module is substantially the radius of the lamp column 50 meters outward. The scope. The street lamp device of claim 4, wherein the lamp post is separated from the lamp post of the other street lamp device by more than 100 meters, and the signal coverage range of the first antenna communication module is used as the distance between the two lamp posts. According to the method, the difference between the signal coverage range of the first antenna communication module and the second antenna communication module is minimized. The street light device of claim 1, wherein the first antenna communication module and the second antenna communication module are separated by more than one-half of a wavelength, and the light-emitting units are disposed in the first antenna communication. Between the module and the second antenna communication module. The street lamp device of claim 1, further comprising: two receiving boxes disposed on the lamp post and each having a main body and a cover member movably disposed on the main body, the main body receiving the The first antenna communication module or the access device of the second antenna communication module, and the cover shields the opening of the main body. The street lamp device of claim 1, wherein the first antenna communication module and the second antenna communication module respectively have at least one signal feed line, and the lamp post houses a radio frequency coaxial cable. Connecting the at least one signal feed line. The street lamp device of claim 1, further comprising: a third antenna communication module disposed on the body and having a third directional antenna structure with a radiation field type facing the body, wherein the third The antenna communication module supports the same communication technology as the first antenna communication module, and the third antenna communication module and the first antenna communication module support different frequency bands, and the first antenna communication module and The signal coverage of the third antenna communication module is approximately equal. The streetlight device of claim 1, wherein the first antenna communication module comprises: an antenna body; at least one signal feed line connecting the antenna body; and a cover for housing the antenna body and The at least one signal feed line is assembled; and a metal reflector is disposed on a side of the antenna body.