1000366464 CABLE [0001] This application claims the benefit of priority to Chinese patent application No. 201320378751.8 titled "CABLE", filed with the Chinese State Intellectual Property Office on June 27, 2013. The entire disclosure of which is incorporated herein by reference. 5 FIELD OF THE INVENTION [0002] The present application relates to the field of communication technology, in particular, to a cable. BACKGROUND OF THE INVENTION [0003] With the all-round development of communication technology, data communication 0 and multimedia business have an increasingly higher requirement for communication speed, call quality, intellectuality, and the like of the digital mobile terminal apparatus. Based on this background, the infrastructure of the mobile communication system is undergoing a great technical change. Operators all over the world are making efforts to upgrade the technology, reduce the operation cost, form a network scale quickly, and improve the network coverage. An 15 urgent problem to be solved by the operator is to construct a large number of base stations within a shortest time. [0004] Under such a background, the distributed base station using the remote radio technology is developed quickly. Many operators are arranging the distributed base station framework by replacing traditional macro base station with a remote radio unit mounted aside 20 the antenna on the tower top or the housetop. A technical feature of the remote radio technology is to convert a base band signal into an optical signal to transmit, and amplify the transmitted signal at the far-end. The "remote" means to separate the base band unit of the base station from the radio unit, and a base band signal is transmitted between the base band unit and the radio unit. With the remote radio technology, a stable connection with apparatus of the mainstream 25 manufacturer is possible, and the speed of the network construction and the flexibility of the 1 1000366464 network configuration are improved, which not only saves the space and increases the covering area of the base station, but also reduces the wiring cost, simplifies the installing, and improves the operation efficiency. The remote radio technology is one of the optimal operation wiring solutions cooperated with the current communication technology. 5 [0005] Presently, the remote radio unit generally employs an independent optical fiber and an independent cable, the optical cable and the power supply at the tower top are separated, and each section uses one optical cable and one power wire. Due to the scarcity of the routing resource of the tower, the number of the cables is large, resulting in complicated construction, large cable laying cost and difficulty, and high operation cost. 0 SUMMARY OF THE INVENTION [0006] It is provided according to embodiments of the present application a cable, for reducing the number of the cable wires. [0007] A cable, including: an optical cable, a power wire, a ripcord and a first sheath; 5 the power wire and the ripcord are located outside of the optical cable; and the first sheath is located at the outermost layer, and the power wire and the ripcord are wrapped by the first sheath. [0008] Preferably, an armor layer is provided between the first sheath and the power wire as well as between the first sheath and the ripcord. 20 [0009] Preferably, the armor layer is an armor layer having an annular metal tube-shaped corrugation. [0010] Preferably, a cladding layer is provided outside of the optical cable, the power wire and the ripcord, and inside of the first sheath; and the ripcord is located between the cladding layer and the armor layer. 25 [0011] Preferably, the armor layer is a metal tape armor layer or a composite metal tape armor 2 1000366464 layer. [0012] Preferably, a conductor cross-sectional area of the power wire is ranged from 1.5 to 50mm2. [0013] Preferably, the optical cable is located at an inner layer of the cable, and the power 5 wire is arranged outside of the optical cable in a layer stranding manner or a bunching manner. [0014] Preferably, the power wire includes, from inside to outside, a stranded copper conductor and a second sheath, or includes a copper conductor, an insulation braid armored outer conductor and a second sheath. [0015] Preferably, the optical fiber of the optical cable is a tight buffered optical fiber or a 0 ribbon optical fiber. [0016] Preferably, if the optical fiber of the optical cable is the tight buffered optical fiber, the optical cable includes a cable core and a third sheath located outside of the cable core for wrapping the cable core, and the cable core includes an optical fiber, a sheath for tightly wrapping the optical fiber, and a reinforcing member; and 5 if the optical fiber of the optical cable is the ribbon optical fiber, the optical cable includes a ribbon optical fiber and a third sheath for wrapping the ribbon optical fiber. [0017] As can be seen from the above technical solutions, the embodiments of the present application have the following advantages: with the optical-electric composite cable structure, the number of the cables to be wired can be reduced greatly, which can simplify the wiring 20 process, reduce the laying cost and the laying difficulty. Meanwhile the operation cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS [0018] In order to clearly illustrate technical solutions in embodiments of the present application, drawings required for the description of the embodiments will be introduced briefly 25 hereinafter. Apparently, drawings described below are only some embodiments of the present application, and those skilled in the art may obtain other drawings based on these drawings 3 1000366464 without any creative work. [0019] Fig. 1 is a structural schematic diagram of a cable according to an embodiment of the present application; [0020] Fig. 2 is a structural schematic diagram of a cable according to an embodiment of the 5 present application; [0021] Fig. 3 is a structural schematic diagram of a cable according to an embodiment of the present application; [0022] Fig. 4 is a structural schematic diagram of an optical-electric composite cable according to an embodiment of the present application; 0 [0023] Fig. 5 is a structural schematic diagram of an optical cable in an optical-electric composite cable according to an embodiment of the present application; [0024] Fig. 6 is a structural schematic diagram of an optical-electric composite cable according to an embodiment of the present application; [0025] Fig. 7 is a structural schematic diagram of an optical cable in an optical-electric 5 composite cable according to an embodiment of the present application; [0026] Fig. 8A is a structural schematic diagram of an armor layer of an optical-electric composite cable according to an embodiment of the present application; and [0027] Fig. 8B is a partial enlarged structural schematic diagram of an armor layer of an optical-electric composite cable according to an embodiment of the present application. 20 DETAILED DESCRIPTION [0028] In order that objects, technical solutions and advantages of the present application are clear, the present application will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments made by those skilled in the 25 art based on the embodiments of the present application without any creative work should fall 4 1000366464 within the protection scope of the present application. [0029] It is provided according to embodiments of the present application a cable, as shown in Fig. 1, reference may also be made to Figs. 2 to 9, and the cable includes: an optical cable, a power wire, a ripcord, and a first sheath, among which; 5 the power wire and the ripcord are located outside of the optical cable; and the first sheath is at the outermost layer, and the power wire and the ripcord are wrapped by the first sheath. [0030] In the embodiment of the present application, with the optical-electric composite cable structure, the number of the cables to be wired can be reduced greatly, therefore the wiring 0 process is simplified, and the laying cost and laying difficulty are reduced. Meanwhile the operation cost is greatly saved. [0031] Further, as shown in Fig. 2, an armor layer is provided between the first sheath and the power wire as well as between the first sheath and the ripcord. [0032] Preferably, the armor layer is an armor layer having an annular metal tube-shaped 5 corrugation. [0033] Preferably, the armor layer is a metal tape armor layer or a composite metal tape armor layer. [0034] Generally, the thickness of the metal tape armor layer or the composite metal tape armor layer described above may be equal to or larger than 0.15mm. 20 [0035] In the embodiment of the present application, since the armor layer is configured to have a unique corrugation structure, sizes of the reinforcing member and the sheath thereof may respectively be similar to the size of the corrugated outer conductor and that of the sheath of the radio frequency (RF) feeders of the general specifications of 1/2" 7/8" 1-4 and 1-5/8 The optical-electric composite cable according to the embodiments of the present application 25 may be used together with accessories of the existing RF feeder. Preferably, in the embodiments of the present application, the armor layer may employ a corrugated aluminum tube which has 5 1000366464 advantages of light weight and good bending property, thereby the flexibilities of installing and laying are increased. In addition, in the embodiments of the present application, the optical-electric composite cable has a grounding function, which can save the cost for independently arranging the grounding wires. Thus the solution is one of the optimal 5 optical-electric composite wiring solutions for the remote radio unit. [0036] Optionally, the conductor cross-sectional area of the power wire is ranged from 1.5 to 50mm-. [0037] Optionally, the optical cable is located at an inner layer of the cable, and the power wire is arranged outside of the optical cable in a layer stranding manner or a bunching manner. 0 [0038] Preferably, as shown in Fig. 3, a cladding layer is provided outside of the optical cable, the power wire and the ripcord, and inside of the first sheath. [0039] Optionally, the power wire includes, from inside to outside, a stranded copper conductor and a second sheath, or includes a copper conductor, an insulation braid armored outer conductor and a second sheath. 5 [0040] Optionally, the optical fiber of the optical cable is a tight buffered optical fiber or a ribbon optical fiber. [0041] Optionally, if the optical fiber of the optical cable is the tight buffered optical fiber, the optical cable includes a cable core and a third sheath located outside of the cable core for wrapping the cable core, and the cable core includes an optical fiber, a sheath for tightly 20 wrapping the optical fiber, and a reinforcing member. [0042] If the optical fiber of the optical cable is the ribbon optical fiber, the optical cable includes a ribbon optical fiber and a third sheath for wrapping the ribbon optical fiber. [0043] The above cable is a cable which includes an optical cable and a power wire, thus it may be referred to an "optical-electric composite cable". In order to illustrate the structure of 25 the cable in the above embodiments in detail, the embodiments of the present application will be illustrated in detail by taking examples below, and reference may be made to Figs. 4 to 9. [0044] It is provided according to the embodiments of the present application an 6 1000366464 optical-electric composite cable, as shown in Fig. 4 and Fig. 6, and the optical-electric composite cable includes: a cable core (regarding the cable as a whole, the cable core includes a power wire and an optical cable, the cable core may further include a filling member and so on), an armor layer, a ripcord 5 and a sheath. [0045] The cable core includes an optical cable, a power wire, and a filling member if possible. The cable core is formed in a layer stranding manner or a bunching manner. The layer stranding may be a helically stranding or an SZ stranding. The optical cable is located in the middle and is the innermost layer of the optical-electric composite cable. The power wire and the possible 0 filling member are stranded around the optical cable. In order to reduce the construction cost, the cable core of the optical-electric composite cable in the embodiments of the present application has a circular structure, the optical cable is located in the middlemost portion of the cable core, the number of the optical fiber cores is 2 to 24; and the power wire is located outside of the optical cable in a layer stranding manner or a bunching manner, and the number of the 5 power wires is 2 to 10. In order that the cable core unit has a compact internal structure, a filling member may be added or the stranding manner may be improved to effectively compensate the space inside the cable core, such that the cable core is round. [0046] As a medium for transmitting a signal, the optical cable may include a cable core and a sheath. The optical cable includes a tight buffered optical fiber or a ribbon optical fiber, a 20 reinforcing member, and a filling member and a binding yam if possible, a typical structure is shown in Fig. 5 and Fig. 7. The optical fiber for the optical cable may be a single-mode optical fiber or multi-mode optical fiber, it may also be a ribbon optical fiber. The number of the optical fiber is 2 to 24, which is determined by the quantity of signals to be transmitted. [0047] Optionally, the cable core may have a wrapped or longitudinal-wrapped cladding layer. 25 The material of the cladding layer is a polyester tape, a polyester non-woven fabric tape, a water blocking tape having a sufficient strength, or other suitable tape material. [0048] The power wire may include a stranded copper conductor and a sheath, or include a copper conductor, an insulated-weave armored outer conductor and a sheath. The conductor 7 1000366464 cross-sectional area of the power wire should be selected reasonably according to the transmission voltage, the transmission distance and the power consumption of the apparatus being powered. Considering security and voltage drop, and according to different lengths of the cable, the conductor cross-sectional area of the power wire may be ranged from 1.5 to 501flm. 5 [0049] As shown in Fig. 8A and Fig. 8B, Fig. 8B is a partial enlarged diagram of the circular region in Fig. 8A. The armor layer described above is an armor layer having an annular metal tube-shaped corrugation, and the armor layer is located between the cable core and the sheath. In addition to the effects of increasing the mechanical strength, protecting the cable core, effectively counteracting the stretching and impact from the external environment, the armor 0 layer also has the effect of fastening the cable core, and thus the process in which a hole is provided in the armor layer and a fixing glue is injected to fix the cable core during the installing and laying of the cable is eliminated. At the same time, the size of the structure of the armor layer is the same as that of the structure of an outer conductor of an RF feeder of the existing wireless mobile communication base station system. Therefore, the armor layer can be 5 used together with the existing base station accessories, which facilitates the installation. [0050] The material of the armor layer is a metal tape material. Optionally, the armor layer is made of any of the metal tape and the composite metal tape having a thickness larger than or equal to 0.15mm. The manufacturing process may include: cutting the edge of the metal tape material and shaping the metal tape material; welding the metal tape material into a tube by 20 argon-arc welding after the whole cable core is wrapped; processing the tube with a drawing die process such the tube has a certain diameter and then performing an embossing process to form an annular corrugated tube with the required diameter. In the embodiments of the present application, a gear embossing process is performed in the manufacturing of the armor layer. By controlling the size of the wave trough of the armor layer, the wave trough of the armor layer is 25 in close contact with the cable core, thus improving the adhesion of the armor layer to the cable core. The structural schematic diagrams of the armor layer and the cable core are shown in Fig. 8A and Fig. 8B. Fig. 8B is a partial enlarged diagram of the circle region in Fig. 8A. In the embodiments of the present application, in addition to the effects of increasing the mechanical strength of the composite cable, protecting the cable core, counteracting the stretching and 8 1000366464 impact from the external environment, the armor layer also has the effect of fastening the cable core, and therefore it is not necessary to drill a hole in the armor layer to inject a fixing glue to fix the cable core, which thus facilitates the subsequent installing and laying processes. Optionally, with a lightweight corrugated armor layer having an annular aluminium tape outer 5 conductor, the armor layer has advantages of good bending property and light weight, which facilitates the transport and installing, and thus the copper material resource is greatly saved. [0051] Optionally, the armor layer employs a particularly designed annular corrugated metal tube armored structure, sizes of the corrugated structure and the sheath structure thereof are the same as those of the RF feeder of the existing wireless mobile communication base station 0 system. Therefore the armor layer can be used together with the existing base station accessories, which thereby simplifies the inventory management of the cable accessories. [0052] The sheath is located outside of the armor layer and has a tubular structure, and the sheath is configured to protect the optical cable and the power wire. The material of the sheath layer may be a polyethylene, a polyvinyl chloride or flame-retardant polyolefin polymers. 5 Alternatively, the material of the sheath layer may be a thermoplastic protective coating material such as the rubber and the polyurethane. [0053] A typical optical-electric composite cable according to the embodiments of the present application is as follows: 20 25 9 1000366464 1 /2" 7/8 -1/4" 158 item optical-electric optical-electric optical-electric optical-electric composite composite composite composite cable cable cable cable type of single-mode, multi-mode ( tight buffered optical fiber or ribbon optical optical cable fiber optical fiber ) number 2 to 24 2 to 24 2 to 24 2 to 24 cable cross-sectional power area of copper 1.5 to 6 3.3 to 16 6 to 25 6 to 50 wire core (m)nI number 2 to 10 2 to 10 2 to 10 2 to 10 a filling member, for example, a circular plastic rope, is added when necessary such that the cable core is round a polyester tape, polyester non-woven fabric tape, water cladding layer blocking tape having a sufficient strength or other suitable tape material ripcord high strength polyester or other polymer industrial filament material metal tape material or metal composite tape material (aluminum tape is preferred) structure annular corrugated structure outer diameter of wave 13.00 to 14.60 24.00 to 26.00 35.00 to 45.00 to armor crest (mm) 37.00 48.00 layer diameter of wave 11.50 to 12.80 20.50 to 23.00 30.50 to 40.00 to trough (mm) 33.50 43.00 diameter of pitch (mm) 4.00 to 6.00 5.00 to 8.00 7.00 to 10.00 8.50 to 12.00 thickness of tube wall 0.5 (mm) outer diameter of sheath layer (mm) [0054] Optionally, the ripcord may be provided under the armor layer, and the ripcord runs through the length of the whole composite cable and has a strength which is sufficient for ripping the armor layer. [0055] In embodiments of the present application, a single optical-electric composite cable has 5 an optical cable and a power wire, and has a grounding function. With such an optical-electric composite solution, the wiring of the wireless remote radio unit is more convenient, flexible and 10 1000366464 more economical. In the embodiments of the present application, since the armor layer has an unique corrugation structure and framework, sizes of the reinforcing member and the sheath of the armor layer are respectively similar to the size of the corrugated outer conductor and that of the sheath of the radio frequency (RF) feeders of the general specifications 1/2", 7/8" 1-1 5 and 1-518". The optical-electric composite cable according to the embodiments of the present application can be used together with accessories of the existing RF feeder. Preferably, in the embodiments of the present application, the armor layer may employ a corrugated aluminum tube which has advantages of a light weight and a good bending property, thereby the flexibility of installing and laying is increased. In addition, in the embodiments of the present application, 0 the optical-electric composite cable has a grounding function, which can save the cost for arranging the grounding wires independently. Thus the solution is one of the optimal optical-electric composite wiring solutions for the remote radio unit. [0056] The above are only preferred embodiments of the present application, however, the protection scope of the present application is not limited to the above embodiments. 5 Modifications or variations that can be easily conceived by those skilled in the art within the technical field disclosed by the embodiments of the present application should be deemed to fall within the protection scope of the present application. Therefore, the protection scope of the present application should be defined by the claims. 11