KR102547076B1 - Terminal Connection Structure For Optical Fiber and Power Line Composite Cable - Google Patents

Abstract

The present invention relates to an end connection structure of an optoelectric composite cable that improves the workability of a branching operation of an optoelectric composite cable and a connection operation between an optoelectric composite cable and a jumper cable in a base station and the like, and minimizes the volume.

Description

Terminal connection structure of optical fiber composite cable {Terminal Connection Structure For Optical Fiber and Power Line Composite Cable}

The present invention relates to an end connection structure of an optical hybrid cable. More specifically, the present invention relates to an end connection structure of an optoelectric composite cable, which improves workability of a branching operation of an optoelectric composite cable and a connection work between an optoelectric composite cable and a jumper cable in a base station and the like, and minimizes the volume.

In the case of conventional mobile communication, a communication signal is transmitted to a base station from a communication company's backbone station, and an RF signal transmitted from a base transceiver station (BTS) of the base station is wirelessly transmitted through a base station antenna. In addition, the radio signal transmitted from the user's portable terminal is received by the antenna of the base station, and the received signal is amplified through a tower mount amplifier (TMA) and transmitted to the BTS.

In this case, the BTS, TMA, and antenna of the base station are connected by a coaxial feeder line, but the coaxial feeder has a greater signal loss as the cable length increases. When the antenna is installed in a tower with a height of several tens of meters, loss increases in the coaxial feeder line connecting the ground base station and the antenna, and the signal provided from the base station is required by the antenna due to the signal loss of the coaxial feeder line. Since the signal strength is not reached and attenuated, a Tower Mounted Amplifier (TMA) is installed to compensate and amplify it.

However, since the TMA consumes a relatively large amount of power to amplify the signal, from the point of view of the overall system, maintenance costs are high, resulting in low efficiency.

Base station facilities have evolved along with the evolution of FTTx (Fiber to the X) and the miniaturization of repeaters. Compared to coaxial cables, the optical unit is characterized by minimal signal attenuation according to the length of the cable. Applying these advantages, RRH (Remote Radio Head), a technology that minimizes signal loss by transmitting an optical signal to the base station antenna and converts the optical signal to an RF signal that can be radiated immediately before the antenna, has appeared.

The RRH (Remote Radio Head) compensates for the disadvantages of power consumption and inefficiency of maintenance of the mobile communication base station using the conventional TMA. RRH separates RRU (Remote RF Unit) from a conventional BTS, places it under the antenna of a base station tower, and remotely controls it.

Here, the remaining parts of the existing BTS from which the RRU is separated from the RRH, that is, the baseband unit (BBU) and the power supply unit (PSU), are connected to the RRU by an optoelectronic composite cable including an optical unit and a power line unit with little attenuation per length, , Communication signals from the BBU (Baseband Unit) and PSU (Power Supply Unit) are supplied to the RRU (Remote RF Unit) through the optical unit constituting the optoelectric composite cable, and the power is supplied to the RRU through the power line unit constituting the optoelectric composite cable. (Remote RF Unit).

Since the RRU (Remote RF Unit) can be installed directly below the base station antenna on the top of the base station tower, the length of the coaxial feeder line for supplying the signal converted into an RF signal by the RRU (Remote RF Unit) to the antenna is minimized and the coaxial Since RF signal attenuation generated during RF signal transmission through a wire is not a problem, the amount of signal attenuation right before radiation is minimized, and the need for TMA, which used a lot of power consumption, is eliminated. This technical feature has become a feature of the RRH in terms of maintenance of the base station.

In such an RRH system, a method in which a baseband unit (BBU), a power supply unit (PSU), and a remote RF unit (RRU) are generally connected through a terminal box for an optical power composite cable or the like has been introduced.

The photovoltaic composite cable is a cable in which an optical unit and a power line unit are converted into one cable, so that BBU (Baseband Unit), PSU (Power Supply Unit) and various RRU (Remote RF Units) installed in one tower are directly connected to the photoelectric composite cable. There is no number, and a method in which a power line unit and an optical unit are branched from an end connection structure of an optical power cable and connected to a plurality of RRUs may be used.

When one optoelectric composite cable is branched into multiple jumper cables, multiple power line units and optical units constituting the optoelectric composite cable within the cable terminal box and power line units and optical units constituting each jumper cable are connected within the terminal box. must be connected using connectors, etc.

If the number of base station antennas increases according to a carrier or communication method, the number of RRUs or terminal boxes installed in one base station increases accordingly.

Therefore, it is not desirable to increase the size of the terminal box in order to secure the number of terminal boxes or RRUs that can be installed through one base station.

In addition, since the base station connects the optoelectric composite cable that is led into the terminal box through the conventional terminal box and the jumper cable for connecting the terminal box and the RRU, it is performed in a high and narrow space, so the connection work needs to be simplified. there is

In an environment where the types of communication companies or communication methods become more diverse and rapidly change, it is required to improve the connection work of the terminal box that connects the optical power composite cable and the jumper cable.

In addition, the connection work of the terminal box connecting the optoelectric composite cable and the jumper cable was performed in the base station. That is, in a state in which the terminal box is installed on the base station, the optoelectronic composite cable is pulled up and each optical unit and power line unit are connected to the connection unit of the jumper cable within the terminal box.

In this regard, U.S. Patent Publication No. US2013/0108227 introduces a technique of installing jumper cables in a state where an optoelectric complex cable is pre-connected and a jumper cable is connectorized or patchcoded and a terminal box is installed in a base station. It is not easy to pull the photoelectric composite cable up to the base station antenna located at a height of several tens of meters with the terminal box attached to the end of the composite cable. There is a possibility that bulky terminal boxes will be damaged in the process of being transported, and they will take up too much space in the limited space on the base station.

In addition, since the terminal box introduced in U.S. Patent Publication No. US2013/0108227 has a structure that simply branches the photoelectric composite cable, the conductor of each power line unit or the optical fiber of the optical unit is provided on the surface of the housing by stripping the photoelectric composite cable for a very long time. The optical terminal of the optical connection unit or the power terminal of the power connection unit should be respectively connected. In the case of adopting such a structure, the number of jumper cables connecting the terminal box and one RRU increases, and the terminal connectors of a large number of jumper cables must be intensively connected or mounted in an area where connection units for connector connection are concentrated. It becomes difficult to connect the connector of the jumper cable to the connection unit of the terminal box.

Furthermore, in recent years, a terminal box in which the end of an optoelectric composite cable is connectorized and directly attached to a cable connection unit of a terminal box has been introduced in addition to jumper cables, but the work of converting the end of a large-capacity optoelectric composite cable into one connector The difficulty and cost of the work are greatly increased, and the workability of the jumper cable connection work is low because the jumper cable connectors to which the jumper cable connectors are mounted are concentrated in a limited area to connect the jumper cables. It is the same as the method introduced in US2013/0108227.

An object of the present invention is to provide an end connection structure of an optoelectric composite cable with improved workability of a branching operation of an optoelectric composite cable and a connection work between an optoelectric composite cable and a jumper cable in a base station, etc., and with a minimized volume. .

In order to solve the above problems, the present invention is provided with a housing, a plurality of optical units and a plurality of power line units, an optoelectric composite cable introduced into the housing, and an optical unit and power line unit of the photoelectric composite cable in the housing. It is possible to provide an end connection structure of an optoelectronic composite cable including a plurality of connection cables including at least one connection light unit and a connection power line unit connected to each other and led out of the housing.

In addition, the length between both ends of the connection cable may be 20 centimeters (cm) to 2 meters (m).

Here, the diameter of the housing may be 4 times or less than the diameter of the optoelectric composite cable.

Also, the length of at least one connection cable among the plurality of connection cables may be different.

In addition, it is installed inside the housing, and divides a space in which an optical unit connection unit and a power line unit connection unit in which the optical unit and power line unit of the photoelectric composite cable and the connection optical unit and connection power line unit of a plurality of connection cables are mutually connected are disposed A partitioning member may be included.

In addition, a connection unit having an optical terminal connected to the connection optical unit and the power terminal may be provided at ends of the plurality of connection cables.

In addition, the housing is configured to have a circular cross section, the optoelectric composite cable may be introduced into the housing, and the connection cable may be drawn out of the housing.

In addition, the photovoltaic composite cable may be introduced into the center of the lower surface of the housing, and the connection cable may be drawn out at a spaced position along an upper edge of the housing.

In this case, the partitioning member may be provided to partition an arrangement space of the light unit connection part and the power line unit connection part.

Here, the light unit constituting the photovoltaic composite cable is provided in a circumferential direction at the center, the power line unit is disposed in a circumferential direction outside the light unit, and the light unit connection part in the housing is inside the partition member. , and the power line unit connection part may be disposed outside the partition member.

In addition, the housing may be divided into a plurality of pieces and assembled.

The housing may include a cap member having an outlet for the connection cable and at least two body members that form an accommodation space in the housing and are detachable.

In addition, a diameter of a lead-in portion through which the photovoltaic composite cable is drawn may be smaller than a diameter of a lead-out portion through which the connection cable is drawn out.

In addition, the optical power composite cable is connected to a baseband unit (BBU) and a power supply unit (PSU) of a mobile communication base station system, and a connection unit provided at an end of the connection cable connects a remote RF unit (RRU) device and a jumper cable as a medium. can be connected with

The connection structure at the terminal of the photoelectric composite cable according to the present invention is provided with a connection cable that is drawn out from the housing and extends, so that workability of a connection operation between the photoelectric composite cable and the jumper cable in a base station can be improved.

In addition, the terminal connection structure of the photovoltaic composite cable according to the present invention does not install a connection unit for attaching the connector of the jumper cable to the housing, but has a connection unit at the end of the connection cable extended from the housing to provide a contact unit to the housing. The size of the housing can be reduced compared to the case of installing the

In addition, since the terminal connection structure of the photoelectric composite cable according to the present invention connects the optical unit and the power line unit by inserting the photoelectric composite cable into the housing, the cost of making the end connector of the photoelectric composite cable can be omitted and the structure can be simplified.

1 shows a configuration diagram of a base station in which an end connection structure of an optical hybrid cable according to an embodiment of the present invention is installed.
2 shows one embodiment of an optoelectric composite cable.
3 shows an end connection structure of an optoelectric composite cable according to an embodiment of the present invention.
FIG. 4 shows the internal structure of the terminal connection structure of the photovoltaic composite cable shown in FIG. 3 .
Figure 5 shows an exploded view of the housing of the terminal connection structure of the photovoltaic composite cable according to one embodiment of the present invention.
6 shows a side view of an end connection structure of an optoelectric composite cable according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete, and the spirit of the invention will be sufficiently conveyed to those skilled in the art. Like reference numbers indicate like elements throughout the specification.

1 shows a configuration diagram of a base station in which an end connection structure of an optical hybrid cable according to an embodiment of the present invention is installed.

The RRH-type base station 1 is characterized in that the RRU (40, Remote RF Unit) is separated from the conventional BTS-type base station, placed under the antenna 20 of the base station tower, and remotely controlled.

Here, in the RRH-type base station system 1, the remaining parts 10 of the existing BTS-type base station from which the RRU 40 is separated, that is, the BBU (Baseband Unit), PSU (Power Supply Unit), and RRU have attenuation per length. It is connected by a photovoltaic composite cable 100 including almost no optical units and power line units.

Communication signals from the BBU (Baseband Unit) and PSU (Power Supply Unit) are supplied to the RRU (40) through the optical unit constituting the optoelectric composite cable, and power is supplied to the RRU (40) through the power line unit constituting the optoelectric composite cable. supplied with

Since the RRU 40 may be installed directly below the base station antenna 20 on top of the base station tower, the length of the coaxial line 30 for supplying the signal converted into an RF signal in the RRU 40 to the antenna 20 Since is minimized and RF signal attenuation generated during RF signal transmission through the coaxial line 30 is not a problem, the amount of attenuation of the signal right before radiation is minimized, and there is no need for a TMA that used a lot of power consumption in the past. This technical feature has become a feature of the RRH in terms of maintenance of the base station.

As shown in FIG. 1, in the base station system 1 of the RRH method, a baseband unit (BBU), a power supply unit (PSU), and a remote RF unit (RRU) are terminal connection structures of an optical hybrid cable according to the present invention ( 500) is connected as a medium.

That is, the photovoltaic composite cable 100 is a cable in which an optical unit and a power line unit are made into one cable, and various types installed in one tower and a part 10 composed of a baseband unit (BBU) and a power supply unit (PSU). A plurality of RRUs (Remote RF Units) cannot be directly connected, and each optical unit and power line unit constituting the optoelectric composite cable 100 are branched from the terminal connection structure 500 of the optoelectric composite cable, and then the plurality of RRUs A method in which each is connected via 40 and jumper cables 50 may be used.

In addition, as the types of portable terminals have recently diversified, new terminals and old terminals with different communication methods for each communication generation coexist, and mobile communication operators share a tower for installing the antenna 20 constituting the RRH, one tower top. Equipment such as the RRU (40) constituting dozens of RRHs was installed in the tower, and the limited installation space of the tower became insufficient and the burden on installation equipment increased.

In addition, when a worker works through the terminal box, the connection work of connecting the optical unit and power line unit constituting the optoelectric composite cable 100 and the optical unit and power line unit constituting the jumper cable 50 takes a considerable amount of work time. Demand.

Therefore, the volume of the end connection structure 500 of the optoelectric composite cable connected to various RRU devices is also minimized, minimizing the space constraints installed in the tower for installing the antenna 20, and simply performing the connection between the optoelectric composite cable and the jumper cable. There is a need for an end connection structure of an optoelectric composite cable capable of

Hereinafter, after explaining the structure of the optoelectric composite cable, the end connection structure of the optoelectric composite cable according to the present invention will be described in detail.

2 shows one embodiment of an optoelectric composite cable. Specifically, FIG. 2 (a) shows a perspective view of a multi-stage stripped photoelectric composite cable, and FIG. 2 (b) shows a cross-sectional view of the photoelectric composite cable.

Referring to FIG. 2 , the optoelectric composite cable 100 may include a cable core 105 and an outer skin layer 150 surrounding the cable core 105 .

The cable core 105 may include a plurality of power line units 110 for power supply and a plurality of optical units 130 for transmitting optical signals.

A central tension line 145 may be provided at the center of the photovoltaic composite cable 100 to prevent the photovoltaic composite cable 100 from being bent more than necessary or to provide support against tensile force.

The central tension line 145 is located at the center of the photovoltaic composite cable 100 to provide resistance to a repulsive force or tensile force that opposes the bending force when a bending force acts on the photoelectric composite cable 100, thereby providing resistance to the photovoltaic composite cable ( 100) is prevented from bending or breaking more than necessary and serves to support the shrinkage of the tube due to temperature changes. Accordingly, damage to the light unit 130 or the power line unit 110 can be prevented.

A plurality of optical units 130 may be disposed on the outer circumferential surface of the central tension line 145 in the longitudinal direction of the photoelectric composite cable.

In addition, a protective layer 140 for protecting the optical unit 130 may be further provided outside the layer of the plurality of optical units 130 .

Comparing the optical unit 130 and the power line unit 110, the optical unit 130 has a smaller diameter than the power line unit 110, and the optical fiber 133 provided in the optical unit 130 is bent or disconnected. Since it is relatively more fragile, the light unit 130 may be disposed on the outer circumferential surface immediately of the central tension line 145, and the outer circumferential surface thereof may be wrapped with the protective layer 140, and then the power line unit 110 may be disposed on the outer circumferential surface of the protective layer. .

In addition, the cable core 105 may further include a filler 120 filling gaps between the plurality of power line units 110 or light units 130 .

Since the power line unit 110 has a circular shape, a gap or clearance is generated between adjacent power line units. In this configuration, since the entire outer appearance of the photovoltaic composite cable 100 does not maintain a circular shape, it is vulnerable to bending or shock acting from the outside. Therefore, it may be configured to have a structure capable of withstanding an external impact by filling the gaps in the cable core 105 with the filler 120 and maintaining the outer shape of the filler 120 in a circular shape.

The cable core 105 may further include a non-woven fabric tape 153 to cover the outer circumference of the cable core 105 .

An outer skin layer 150 is provided outside the cable core 105 . The outer skin layer 150 may include a metal protective layer 151 formed with wrinkles 152 formed by repeated ridges and valleys so as to surround the cable core 105 .

The metal protective layer 151 has a corrugated shape in which corrugated peaks and corrugated valleys are repeatedly formed, and may be composed of a metal pipe such as aluminum. Looking at the method of forming the metal protection layer 151, a plate-type metal plate is supplied together with the cable core 105 including the light unit 130 and the power line unit 110, and the metal plate is rolled. After molding to surround the outside of the cable core, both ends of the contacting metal plates are joined by welding or the like to form a pipe having a predetermined diameter. Subsequently, it may be configured by pressing at predetermined intervals to form wrinkles on the outside of the pipe.

The outer skin layer 150 provided on the outermost part of the photoelectric composite cable 100 is a part forming the outer shape of the photoelectric composite cable 100, and the optical unit 130 and the power line unit 110 included in the photoelectric composite cable 100 ) to protect

The outer skin layer 150 is inscribed with the cable core 105, surrounds the cable core 105 in a circular shape, and includes a metal protective layer 151 protecting the cable core 105 from external impact and the metal protective layer ( 151) may include an outer jacket 155 surrounding it.

The outer jacket 155 may be made of a flame retardant and environmentally friendly resin. For example, the outer jacket 155 may be made of polyethylene, polypropylene, or polyvinyl chloride (PVC).

The cable core 105 may further include a nonwoven fabric tape 153 surrounding the outer circumference of the cable core 105 and surrounding the power line unit 110 and the light unit 130 in a circular shape. The non-woven fabric tape 153 is a compressed non-woven fabric and may be disposed in a form of wrapping an internal light unit and power line unit.

The non-woven fabric tape 153 may be formed by cross-winding or longitudinally stacking a material in the form of a tape.

On the other hand, the optical unit 130 can be configured in any form including an optical fiber for transmitting an optical signal, for example, at least one or more optical fibers 133 and a tube surrounding the optical fiber 133 ( 135) may be included. The tube 135 may be made of, for example, polybutylene terephthalate (PBT), polypropylene, polyethylene, or polyvinyl chloride. In addition, a filler may be additionally filled in the tube 135 . For example, jelly may be filled or a tension member 137 such as aramid yarn may be filled. The tensile member 137 has excellent tensile strength and is flexible, so that the cable can be stably installed.

The optical unit 130 may be configured in a necessary form among various types such as a tight buffer type or a loose tube type.

Also, each power line unit 110 includes a conductor 113 and an insulator 115 surrounding the conductor 113 . The power line unit 110 may be formed in a form conforming to a standard used for general power, and the plurality of conductors 113 may take a form twisted with each other. Also, the conductor 113 may be made of a metal such as copper or aluminum, and the insulator 115 may be made of a polymer resin such as polyethylene, polypropylene, or polyvinyl chloride.

As described above, the photovoltaic composite cable 100 is a power line constituting the jumper cable 50 connected to the remote wireless unit 40 after the power line unit 110 and the optical unit 130 are branched in a terminal box, etc. Each unit must be connected.

Interference between the power line unit 110 and the optical unit 130 may occur while the power line unit 110 and the optical unit 130 are branched and connected with the jumper cable 50 inside the terminal box. , This acts as a major factor in increasing the time and cost of constructing the terminal box by reducing the work efficiency of the operator. Therefore, the present invention is different from the conventional terminal box

Therefore, the terminal connection structure of the photoelectric composite cable and the jumper cable 50 according to the present invention is improved in connection work in a base station and the installation space is minimized.

3 shows an end connection structure 500 of an optoelectric hybrid cable according to an embodiment of the present invention, and FIG. 4 shows an internal structure of the end connection structure 500 of an optoelectric hybrid cable shown in FIG. 3 .

The terminal connection structure 500 of the photovoltaic composite cable according to the present invention includes a housing 510, a plurality of light units 130, and a plurality of power line units 110, and a photovoltaic composite cable inserted into the housing 510. At least one connection optical unit 230 and a connection power line unit 210 respectively connected to the optical unit 130 and the power line unit 110 of the optoelectronic composite cable 100 within the cable 100 and the housing 510. ), and a plurality of connection cables 200 drawn out of the housing 510, installed inside the housing 510, and the optical unit 130 and the power line unit 110 of the photoelectric composite cable. A partition member 550 that divides a space in which the optical unit connection part lc and the power line unit connection part pc, in which the connection optical unit 230 and the connection power line unit 210 of the plurality of connection cables 200 are mutually connected, are disposed can include

In the terminal connection structure 500 of the photoelectric composite cable according to the present invention shown in FIGS. 3 and 4, after one photoelectric composite cable 100 is drawn into the housing 510, a plurality of connection cables are connected within the housing 510. It is composed of a structure branched to 200 and drawn out of the housing 510.

Accordingly, connection units 260 having optical terminals connected to the connection optical units 230 and the power terminals may be provided at ends of the plurality of connection cables 200, respectively.

The connection unit 260 provided at the end of each connection cable 200 is attached to the end of the jumper cable (50 in FIG. 1) connecting the RRU provided under the antenna of the base station and the terminal connection structure 500 of the photovoltaic composite cable. It may be connected to the provided jumper connector or directly connected to the connection unit of the RRU.

3, in the present invention, in the terminal connection structure 500 of the optoelectric composite cable, the photoelectric composite cable 100 is introduced to the bottom and connected to a plurality of connection cables 200 in the housing 510, and then each connection cable ( 200) has a structure that extends to the outside of the housing 510 and is drawn out.

In the case of the conventionally introduced terminal box for an optical power composite cable, a connection unit (connector type, etc.) for connecting a jumper cable is provided on the upper surface of the terminal box without having a structure in which a separate connection cable 200 is drawn out structured in a way

The connection unit (connector, etc.) provided at the end of the jumper cable has a standardized size since it is provided with an optical terminal and a power terminal, respectively, and has a fastening structure. Therefore, there is no choice but to arrange a plurality of connection units densely in a limited area such as the terminal box housing 510.

When the connection units are densely arranged in the terminal box housing 510 in this way, the workability of connecting the connectors of the jumper cables to each connection unit may deteriorate.

However, in order to improve workability, a method of increasing the size of the housing 510 in which the connection unit is installed may be considered, but if the size of the terminal box increases, it is not preferable because it takes up a lot of installation space of the base station.

Therefore, the terminal connection structure 500 of the photoelectric composite cable according to the present invention does not include the connection unit 260 for connecting the jumper cable on the surface of the housing 510 constituting the terminal connection structure 500 of the photoelectric composite cable. It is provided at the end of the connection cable 200 installed to be drawn out from the housing 510 without

The length between both ends of the connection cable 200 may be about 20 centimeters (cm) to about 2 meters (m), and by this length, as shown in FIG. 3, the connection cable to which the jumper cable is connected By distributing the positions of the ends, it is possible to obtain the effect of securing the convenience of connection work for connecting jumper cables.

The connection cable 200 should be at least about 20 centimeters (cm) long so that the connection cable can be gently bent and dispersed, and it does not need to be unnecessarily long, so it is preferable to have a length of less than 2 meters (m).

With this structure, the size of the housing 510 is minimized by adopting a structure in which a plurality of connection cables 200 are penetrated and drawn out without greatly increasing the diameter of the housing 510, and the photoelectric composite cable and the jumper cable are connected. Connection means can be provided to do so.

A connector of a jumper cable may be detachably connected to the connection unit 260 provided at the end of the connection cable 200 .

Therefore, in a state in which the terminal connection structure 500 of the photoelectric hybrid cable according to the present invention is installed in the base station, the connector of the jumper cable for connecting each RRU is connected to the connection cable of the terminal connection structure 500 of the optical hybrid cable ( 200) After connecting to the connection unit 260 provided at the end, it is possible to easily connect the end connection structure 500 of the photoelectric composite cable and the jumper cable by fixing using a coupling nut provided in a jumper cable connector, etc. It is possible to greatly improve the workability of a worker's connection work at a base station or the like.

In particular, since the connection cable 200 has a certain length and can secure flexibility in a state where it is drawn out of the housing 510, a certain degree of freedom can be obtained in the mounting direction or mounting position even when the jumper cable is connected. Therefore, the workability of the operator can be greatly improved.

In addition, without providing a connection unit for connecting jumper cables to the housing 510 of the end connection structure 500 of the photoelectric composite cable, the optical unit and the power unit of the photoelectric composite cable are connected to the connection cable 200 inside the housing 510. ) After connecting with the connecting optical unit 230 and the connecting power line unit 210, the connection cable 200 is simply pulled out of the housing 510 to install the connection unit having the optical terminal and the power terminal. Since it can be omitted, an increase in the size of the housing 510 constituting the terminal connection structure 500 of the photovoltaic hybrid cable can be minimized.

As can be seen in the embodiments shown in FIGS. 3 and 4, the diameter D' of the housing 510 is not significantly increased compared to the diameter D of the optoelectric composite cable, so that the housing 510 in the base station ) has the advantage that the space required for installation or fixation is not large.

Specifically, in the terminal connection structure 500 of the photovoltaic hybrid cable according to the present invention, the housing diameter (D′) can be reduced compared to the conventional terminal box due to the above connection cable branching structure. Specifically, the diameter (D′) of the housing 510 of the end connection structure 500 of the photovoltaic composite cable according to the present invention may be 4 times or less than the diameter (D) of the photoelectric composite cable drawn into the housing 510.

As described above, the improvement of the operator's work convenience and the minimization of the size of the housing 510 can be achieved when connecting the connection cable 200 of the end connection structure 500 of the photoelectric composite cable according to the present invention with a jumper cable for connection to the RRU. In addition, this effect can be obtained even when the connection cable 200 is directly connected to the RRU.

That is, when the length of the connection cable 200 is configured to be sufficiently long, a separate jumper cable is omitted and a method of directly connecting the connection unit 260 of the connection cable 200 directly to the connection unit or connector of the RRU can be applied. there is.

As shown in FIGS. 3 and 4 , the housing 510 of the terminal connection structure 500 of the photovoltaic composite cable may have a shape having a circular cross section.

Therefore, since the photovoltaic composite cable 100 is connected to a baseband unit (BBU) and a power supply unit (PSU) located on the ground, it is introduced under the housing 510 installed in the base station, and the connection cable 200 may be configured to be drawn out to the upper surface of the housing 510 and connected to an RRU or the like.

In addition, when the housing 510 is configured to have a circular cross section and is mounted in such a way as to be fixed to the base station by an installation band (not shown), the base station installation area or installation space can be minimized.

In addition, when the housing 510 has a circular cross section, the optoelectric composite cable is introduced into the center of the lower surface of the housing 510, and the connection cable 200 forms an upper edge of the housing 510. It can be configured to be drawn out at positions spaced apart in the circumferential direction according to.

In this case, a plurality of outlets 510h may be provided on the upper surface of the housing 510 so that the connection cable 200 may be drawn out. Each of the outlets 510h may be provided with sealing means 510s for sealing the inside while the connection cable 200 is withdrawn.

The inner space of the housing 510 of the terminal connection structure 500 of the photovoltaic composite cable shown in FIG. 4 is an optical unit connecting portion to which the optical unit 130 of the photoelectric composite cable and the optical unit 230 of the connection cable 200 are connected. (lc) and the power line unit 110 of the photovoltaic composite cable and the power line unit 210 of the connection cable 200 are connected to the power line unit connection part pc.

As reviewed with reference to FIG. 2 , the optical unit constituting the photovoltaic composite cable 100 is provided in a circumferential direction at the center, and the power line unit is disposed outside the optical unit in a circumferential direction.

Accordingly, in the housing 510, the light unit connection part lc may be disposed inside the partition member 550, and the power line unit connection part pc may be disposed outside the partition member 550.

The optical unit and the connecting optical unit 230 each include an optical fiber, and each has a smaller diameter than the power line unit and can be easily damaged by an external stimulus, and can prevent damage to the optical fiber during overdressing of the optical fiber. Since there is a minimum radius of curvature, it is preferable that the light unit connection part lc and the power line unit connection part pc be disposed in a partitioned space.

As shown in the photovoltaic composite cable with reference to FIG. 2, since the optical unit 130 of the photoelectric composite cable 100 is disposed in the center of the cable and the power line unit 110 is disposed around the optical unit, the housing ( 510), a partition member 550 may be provided inside the housing 510 so that the light unit connection part lc is disposed in the center and the power line unit connection part pc is disposed outside.

The partition member 550 may be configured in various forms as long as it divides the light unit connection part lc and the power line unit connection part pc. In the embodiment shown in FIG. 4 , it is shown that the partition member 550 is configured in the form of a pair of facing barrier ribs.

Accordingly, an optical unit connecting portion lc by optical fusion between the optical unit and the connecting optical unit 230 is provided inside the partition member 550, and a power line unit connecting portion pc is provided outside the partition member 550. it is desirable to be

Conventionally introduced terminal boxes use a method of separately branching an optoelectronic composite cable into an optical unit and a power line unit inside the terminal box, and to connect one RRU with a terminal box, a jumper cable for connecting the optical unit and a power line unit connection are required. In most cases, the power line unit jumper cables are configured to be connected to each other, but the connection cables 200 constituting the end connection structure 500 of the photovoltaic composite cable according to the present invention are connected to the optical unit 230 and the connection power line unit, respectively. 210, the connection cable 200 for connection with one RRU can be configured as one, and thus the convenience of cable maintenance in the base station can be improved.

5 shows an exploded view of the housing 510 of the terminal connection structure 500 of the photovoltaic composite cable according to one embodiment of the present invention.

Preferably, the housing 510 constituting the end connection structure 500 of the photovoltaic hybrid cable according to the present invention is configured to be divided into a plurality of pieces and assembled.

That is, the optical unit and the power line unit of the photovoltaic composite cable are connected to the connection optical unit 230 and the connection power line unit 210 of the connection cable 200, respectively, and the optical unit connection part lc and the power line unit connection part pc are connected. In order to be stably placed in the housing 510, it is preferable to configure the housing 510 to have an open structure so that access to the inside of the housing 510 is possible.

Accordingly, the housing 510 includes a cap member 510a formed by separating a plurality of outlets of the connection cable 200 in the circumferential direction and at least two body members that form an accommodation space in the housing 510 and can be disassembled. It is preferable to be composed of (510b, 510c).

In addition, a diameter of an inlet portion of the housing 510 into which the photovoltaic composite cable is introduced may be smaller than a diameter of an outlet portion into which the connection cable 200 is drawn out.

In the accommodation space inside the body members 510b and 510c, the partition member 550 may be integrally configured with any one of the body members, or a method in which the partition member 550 is provided separately and then fastened to one of the body members is used. can

Therefore, the plurality of connection cables 200 are introduced into the inner space of the housing 510 through the outlet 510h of the cap member 510, and the light unit and power line unit of the photoelectric composite cable drawn into the body member After each bonding, the assembly may be completed by assembling the remaining body members.

In addition, sealing members 510s may be further provided at each inlet or outlet to ensure waterproof performance for a gap between the photoelectric composite cable 100 or the connecting cable 200 and the housing 510 that is pulled in or out. .

6 shows a side view of an end connection structure of an optoelectric composite cable according to another embodiment of the present invention.

In the present invention, the terminal connection structure 500 of the photovoltaic composite cable is not directly connected or fastened to jumper cables provided for connection with the RRU facility through the housing, but through the connection cable 200 extending and branching from the housing. Therefore, since the connection unit or connector of the housing does not have to be directly provided in the housing, the diameter of the housing 510 constituting the connection structure 500 can be minimized as described above.

Also, as shown in FIG. 6 , the lengths of each connection cable 200 do not have to be the same. That is, the length of the connection cable may vary depending on the location of the connection target RRU or the length of the jumper cable. This is because an effect of reducing interference between adjacent connection cables can be obtained when each connection cable 200 is diversified rather than the same case. Accordingly, at least one of the plurality of connection cables 200 drawn out from the housing of the terminal connection structure 500 of the photovoltaic hybrid cable according to the present invention may be configured to have a length different from that of the other connection cables.

Although this specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, all of them should be considered to be included in the technical scope of the present invention.

100: photoelectric composite cable
110: power line unit
130: optical unit
500: terminal connection structure of the photovoltaic composite cable
510: housing
200: connection cable
210: connection power line unit
230: connection optical unit
260: connection unit

Claims (14)

cylindrical housing;
a photovoltaic composite cable having a plurality of optical units disposed in a circumferential direction at the center and a plurality of power line units disposed in a circumferential direction outside the optical units, and being led into the housing;
a plurality of connection cables including at least one connection light unit and a connection power line unit respectively connected to the light unit and the power line unit of the photovoltaic composite cable within the housing, and led out of the housing; and,
It is installed in the center of the housing, and an optical unit connecting part in which the optical unit of the photoelectric composite cable and the connecting optical unit are mutually connected is disposed inside, and the power line in which the power line unit of the photoelectric composite cable and the connecting power line unit are mutually connected A partition member partitioning the inner space of the housing so that the unit connection unit is disposed outside,
The terminal connection structure of the optoelectric composite cable, characterized in that the housing has an inlet portion into which the optoelectric composite cable is inserted and an outlet portion through which the plurality of connection cables are drawn out, respectively, at both ends of the housing. According to claim 1,
The terminal connection structure of the photovoltaic composite cable, characterized in that the length between both ends of the connection cable is 20 centimeters (cm) to 2 meters (m). According to claim 1,
The terminal connection structure of the optoelectric composite cable, characterized in that the diameter of the housing is 4 times or less than the diameter of the optoelectric composite cable. According to claim 1,
Terminal connection structure of an optical composite cable, characterized in that the length of at least one of the plurality of connection cables is different. delete According to claim 1,
An end connection structure of an optoelectronic composite cable, characterized in that a connection unit provided with an optical terminal connected to the connection optical unit and the power terminal is provided at the ends of the plurality of connection cables. According to claim 1,
The end connection structure of the optoelectric composite cable, characterized in that the optoelectric composite cable is pulled into the housing, and the connection cable is pulled out of the housing. According to claim 7,
The photoelectric composite cable is inserted into the lower central region of the housing, and the connection cable is pulled out at a spaced position along an upper edge of the housing. delete delete According to claim 1,
The terminal connection structure of the photoelectric composite cable, characterized in that the housing is divided into a plurality and assembled. According to claim 11,
The terminal connection structure of the optoelectric composite cable, characterized in that the housing is composed of a cap member having an outlet for the connection cable and at least two body members that form an accommodation space in the housing and are detachable. According to claim 1,
The terminal connection structure of the optoelectric composite cable, characterized in that the diameter of the lead-in portion of the housing into which the photoelectric composite cable is drawn is smaller than the diameter of the lead-out portion through which the connection cable is drawn. According to claim 13,
The optical power composite cable is connected to the BBU (Baseband Unit) and PSU (Power Supply Unit) of the mobile communication base station system, and the connection unit provided at the end of the connection cable is connected to RRU (Remote RF Unit) equipment and jumper cables. Terminal connection structure of the optoelectric composite cable characterized in that.

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