CN103050180A - Photoelectric composite cable for mobile communication distributed base station - Google Patents

Abstract

The present invention is a photoelectric composite cable for mobile communication distributed base stations, comprising: an outer sheath layer, an optical fiber unit, and an insulated wire unit; the insulated wire unit is composed of multiple thin copper wires wrapped in PVC plastic; it is characterized in that: The optical fiber unit and the insulated wire unit are stranded to form a composite cable core; the outer layer of the composite cable core is wrapped with an outer sheath layer of black PE material. Through the above method, the power supply cable and the communication optical fiber cable used to connect the baseband processing unit and the remote radio frequency unit in the 3G base station are combined into one, which not only saves costs, but also facilitates construction. And when the 280V DC high-voltage remote power supply is used, the power supply distance can reach 4 kilometers, so it is very suitable for the construction of base stations where the distribution distance between the baseband processing unit and the remote radio frequency unit is relatively long.

Description

Photoelectric composite cable for mobile communication distributed base station

technical field

The invention relates to the technical field of communication, in particular to a photoelectric composite cable for a mobile communication distributed base station.

Background technique

  In 3G mobile communications, especially in TD-SCDMA base stations, the baseband processing unit (BBU) and the remote radio unit (RRU) need to be connected with each other by cables and optical cables. The cable is used to supply -48V DC power to the remote radio frequency unit from the baseband processing unit computer room, and the optical cable is used for optical signal transmission between the baseband processing unit and the remote radio frequency unit. In the prior art, cables for power supply and optical cables for communication are laid separately, which wastes material and financial resources, and is not convenient for construction, especially in the construction of distributed base stations where the baseband processing unit is far away from the remote radio frequency unit. The above-mentioned shortcomings of the prior art are not only more prominent, but also when the -48V low-voltage direct current is transmitted on the cable, the line loss is too large, which limits the distance of the remote radio frequency unit from the baseband processing unit.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a photoelectric composite cable for mobile communication distributed base stations, which has reasonable design and simple structure, twists the optical fiber unit and the insulated wire unit together, and realizes the integrated transmission function of electric energy and optical signal.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a photoelectric composite cable for mobile communication distributed base stations, comprising: an outer sheath layer, two optical fiber units and two insulated wire units; the insulated wire unit It is composed of multi-strand thin copper wires covered with PVC plastic, and the outer diameter of the insulated wire unit is more than 3 mm. Among them, the diameter of multi-strand thin copper wires after stranding is more than 1.78 mm, and the cross-sectional area is more than 2.5 square mm; The optical fiber unit and the insulated wire unit are helically stranded at a pitch of 1-1.5m to form a composite cable core; the outer layer of the composite cable core is wrapped with an outer sheath layer of black PE material.

Preferably, the optical fiber unit transmits optical signals through its central fiber core; the fiber core is sequentially wrapped with a tight sleeve, stainless steel armored tube, aramid yarn and PVC sheath on the surface.

Preferably, the fiber core is a G.652D single-mode fiber.

Preferably, the tight sleeve layer is made of nylon.

Preferably, the aramid yarn is longitudinally wrapped on the surface of the stainless steel armored tube.

The beneficial effects of the present invention are: to provide a photoelectric composite cable for mobile communication distributed base station, which combines the power supply cable and communication optical fiber cable used to connect the baseband processing unit and the remote radio frequency unit in the 3G base station into one, which not only saves cost and easy construction. And when the 280V DC high-voltage remote power supply is used, the power supply distance can reach 4 kilometers, so it is very suitable for the construction of base stations where the distribution distance between the baseband processing unit and the remote radio frequency unit is relatively long.

Description of drawings

Fig. 1 is a structural representation of a photoelectric composite cable for a mobile communication distributed base station of the present invention;

Fig. 2 is a structural schematic diagram of an optical fiber unit;

Fig. 3 is a structural schematic diagram of an insulated wire unit;

The marks of the components in the drawings are as follows: 1. Outer sheath layer; 2. Optical fiber unit; 3. Insulated wire unit; 21. PVC sheath; 22. Aramid yarn; 23. G.652D single-mode optical fiber; 24. Tight sleeve layer; 25, stainless steel armored pipe; 31, PVC plastic; 32, multi-strand fine copper wire.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Please refer to accompanying drawing 1 to Fig. 3, the embodiment of the present invention comprises:

A photoelectric composite cable for mobile communication distributed base stations, comprising: an outer sheath layer 1, two optical fiber units 2 and two insulated wire units 3; the insulated wire units 3 are multi-strand fine copper coated with PVC plastic 31 wire 32, the outer diameter of the insulated wire unit 3 is more than 3 millimeters; wherein, the multi-strand thin copper wire 32 has a diameter of more than 1.78 millimeters after stranding, and a cross-sectional area of more than 2.5 square millimeters; the optical fiber unit 2 and the insulated wire The unit 3 is helically stranded at a pitch of 1-1.5m to form a composite cable core; the outer layer of the composite cable core is wrapped with an outer sheath layer 1 of black PE material.

The optical fiber unit transmits optical signals through its central fiber core; the fiber core is sequentially wrapped with a tight sleeve layer 24, a stainless steel armor tube 25, an aramid yarn 22 and a PVC sheath 21 on the surface. Wherein, the fiber core is a G.652D single-mode fiber 23 . The tight sleeve layer 24 is made of nylon. The aramid yarn 22 is longitudinally wrapped on the surface of the stainless steel armor tube 25 .

After laying the photoelectric composite cable for mobile communication distributed base stations in the base station, when the power consumption of the remote radio frequency unit is 220W, the distance of the remote radio frequency unit to the baseband processing unit can be extended by 120 meters, and the -48V DC power supply is normally used for power supply and communication ; And when the baseband processing unit supplies 280V DC high-voltage remote power supply to the remote radio frequency unit, the power supply distance can reach 4 kilometers and normal power supply and communication. When the power consumption of the remote radio frequency unit is less than 220W, the distance between the remote radio frequency unit and the baseband processing unit may be further.

The invention discloses a photoelectric composite cable for distributed base stations of mobile communication, which combines a power supply cable and a communication optical fiber cable for connecting a baseband processing unit and a remote radio frequency unit in a 3G base station into one, which not only saves costs, but also facilitates construction. And when the 280V DC high-voltage remote power supply is used, the power supply distance can reach 4 kilometers, so it is very suitable for the construction of base stations where the distribution distance between the baseband processing unit and the remote radio frequency unit is relatively long. the

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the content of the description of the present invention, or directly or indirectly used in other related technical fields, shall be The same reasoning is included in the patent protection scope of the present invention.

Claims (5)

1. A photoelectric composite cable for a mobile communication distributed base station, comprising: an outer sheath layer, an optical fiber unit and an insulated wire unit; the insulated wire unit is made of a multi-strand fine copper wire covered by PVC plastics; it is characterized in that: The optical fiber unit and the insulated wire unit are twisted into a composite cable core; the outer layer of the composite cable core is wrapped with an outer sheath layer of black PE material. 2. A photoelectric composite cable for mobile communication distributed base stations according to claim 1, characterized in that: the outer diameter of the insulated wire unit is more than 3 millimeters, and the diameter of the strands of thin copper wires after twisting is more than 1.78 millimeters , with a cross-sectional area of more than 2.5 square millimeters. 3. A photoelectric composite cable for distributed base stations of mobile communication according to claim 1, characterized in that: said optical fiber unit transmits optical signals through its central fiber core; said fiber core is wrapped with a tight jacket in turn , stainless steel armored tube, aramid yarn and PVC sheath on the surface. 4. The photoelectric composite cable for distributed base stations of mobile communication according to claim 3, wherein the fiber core is a single-mode fiber. 5. A photoelectric composite cable for mobile communication distributed base station according to claim 3, characterized in that: said aramid yarn is longitudinally wrapped on the surface of said stainless steel armored tube.

Images