CN105284060A - Distributed antenna system, radio-frequency power control method and base station device - Google Patents

Abstract

The invention relates to a distributed antenna system, a radio frequency power control method and base station equipment. According to an embodiment of the present invention, a distributed antenna system (100) is provided, including: a plurality of antennas (11-18); a radio frequency module (20); a radio frequency signal transmission network (30), configured to transmit from the The radio frequency module transmits electrical signals to the plurality of antennas, the radio frequency signal transmission network includes at least one adjustable coupler (31-37); a first controller (40), which is communicatively connected to the radio frequency signal a transmission network configured to control the at least one tunable coupler to adjust the radio frequency power of the plurality of antennas. The system realizes antenna-based power saving in a distributed antenna system, and has finer control granularity without affecting service quality and user experience.

Description

Distributed antenna system, radio frequency power control method and base station equipment Technical field

The present invention generally relates to communication or network technology, and more specifically, to a distributed antenna system.

Distributed Antenna System (Distributed Antenna System, DAS) is widely used in indoor wireless signal coverage. In a typical distributed antenna system, a plurality of antennas connected to a base station device are arranged in a distributed manner at different locations in a building, and are distributed through a coaxial cable, a directional coupler (coupler), a splitter (splitter ) I A power divider (power divider) is connected to the base station equipment. The downlink radio frequency signal is distributed from the base station equipment to each antenna, and the uplink signal from the user terminal received by each antenna is combined in the system and fed back to the base station equipment.

The demand for wireless traffic load in an indoor environment usually varies significantly with different uses of the room and different time periods. For example, a room used as a goods warehouse has a low demand on business load, while a reception hall or a conference room has a high demand on business load. For another example, the business load of the office is relatively high during working hours, and relatively low during off-duty hours. Once the existing distributed antenna system is deployed, the output power of each antenna is fixed and cannot be adjusted according to changes in demand. Contents of the invention

A main object of the present invention is to provide a new distributed antenna system capable of overcoming the above-mentioned drawbacks in the prior art.

According to an embodiment of the present invention, a distributed antenna system is provided, including: multiple antennas; a radio frequency module; a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the multiple antennas, the The radio frequency signal transmission network includes at least one adjustable coupler; a first controller, which is communicatively connected to the radio frequency signal transmission network, and is configured to control the at least one adjustable coupler to adjust the plurality of RF power of the antenna.

In one embodiment, the distributed antenna system further includes a second controller configured to: determine actual traffic loads, expected traffic loads, or service quality requirements of the multiple antennas; determine the radio frequency power required by each of the multiple antennas according to the actual traffic load, the expected traffic load, or the quality of service requirement; and adjusting the total radio frequency power of the radio frequency module according to the radio frequency power required by the multiple antennas.

In one embodiment, the first controller in the distributed antenna system is configured to control the at least one adjustable coupler according to the radio frequency power required by each of the plurality of antennas determined by the second controller .

In one embodiment, said at least one tunable coupler in the distributed antenna system includes a circulator and a tunable matching network. More specifically, the circulator includes a first port, a second port, and a third port, and the adjustable matching network is coupled to the second port and configured to adjust according to a control signal of the first controller. match parameters.

In one embodiment, said at least one tunable coupler in the distributed antenna system comprises a directional coupler comprising tunable coupling components.

In one embodiment, a dedicated control network is used to connect the first controller in the distributed antenna system to the radio frequency signal transmission network. The dedicated control network used includes, for example but not limited to, a C-BUS field bus network or a CAN-BUS field bus network.

According to another embodiment of the present invention, a method for radio frequency power adjustment of a distributed antenna system including a plurality of antennas is provided. The distributed antenna system further includes: a radio frequency module; a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the plurality of antennas, and the radio frequency signal transmission network includes at least one adjustable coupler. The method includes: determining actual traffic loads, expected traffic loads, or service quality requirements of the multiple antennas; determining the multiple antenna traffic loads, expected traffic loads, or service quality requirements according to the multiple antennas. the radio frequency power required by the antennas; and adjusting the total radio frequency power of the radio frequency module according to the radio frequency power required by the multiple antennas.

In one embodiment, the step of determining the radio frequency power required by each of the plurality of antennas in the method includes: determining the radio frequency power required by an antenna to meet its actual service load, expected service load, or a single item in the service quality requirement Lower or minimum RF power for demand or mixed needs.

In one embodiment, the step of determining the radio frequency power required by each of the plurality of antennas in the method includes: when the actual traffic load or the expected traffic load of an antenna is zero, determining the radio frequency power required by it to meet the signal coverage Lower or minimum RF power required.

According to yet another embodiment of the present invention, a method for adjusting radio frequency power of a distributed antenna system including multiple antennas is provided, and the distributed antenna system further includes: a radio frequency module; a radio frequency signal transmission network configured For transmitting electrical signals from the radio frequency module to the plurality of antennas, the radio frequency signal transmission network includes at least one adjustable coupler; the method includes: determining the radio frequency power required by each of the plurality of antennas; according to the determining the coupling ratio required by the at least one adjustable coupler according to the radio frequency power required by each of the multiple antennas, the total radio frequency power required by the radio frequency module, and the topology of the radio frequency signal transmission network; and according to the at least one adjustable coupler Tuning coupler The desired coupling ratio is used to send a control signal to adjust the at least one adjustable coupler.

According to still another embodiment of the present invention, there is provided a base station device for a distributed antenna system including a plurality of antennas. The distributed antenna system further includes: a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the plurality of antennas, and the radio frequency signal transmission network includes at least one adjustable coupler. The base station device includes a radio frequency module, and is configured to: determine actual traffic loads, expected traffic loads, or service quality requirements of the multiple antennas; determining the radio frequency power required by each of the plurality of antennas according to quality requirements; and adjusting the total radio frequency power of the radio frequency module according to the radio frequency power required by each of the plurality of antennas.

In an embodiment, the base station device is further configured to: determine the radio frequency power required by an antenna as a lower or lowest radio frequency that satisfies a single requirement or a mixed requirement among its actual traffic load, expected traffic load, or service quality requirements power.

In an embodiment, the base station device is further configured to: when the actual traffic load or the expected traffic load of an antenna is zero, determine the radio frequency power required by it as a lower or minimum radio frequency power that meets the signal coverage requirement.

According to yet another embodiment of the present invention, there is provided a base station device for a distributed antenna system including a plurality of antennas. The distributed antenna system further includes: a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the plurality of antennas, and the radio frequency signal transmission network includes at least one adjustable coupler. The base station device includes a radio frequency module, and is configured to: determine the radio frequency power required by each of the multiple antennas; according to the radio frequency power required by the multiple antennas, the total radio frequency power required by the radio frequency module, and the radio frequency signal The topology of the transmission network, determining a desired coupling ratio of the at least one adjustable coupler; and sending a control signal to adjust the at least one adjustable coupler according to the desired coupling ratio of the at least one adjustable coupler.

At least part of the above embodiments realize antenna-based power saving in the distributed antenna system, and have relatively fine control granularity, and will not affect service quality and user experience.

The above summarizes the technical features and advantages of the present invention to make the following detailed description of the present invention easier to understand. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. Those skilled in the art should understand that the disclosed concepts and embodiments can be easily used as the basis for modifying or designing other structures or processes for achieving the same purpose as the present invention. Those skilled in the art should also understand that such equivalent constructions do not depart from the spirit and scope of the appended claims. Description of drawings

The following detailed description of preferred embodiments of the present invention will be easier to understand with reference to the accompanying drawings. The present invention is described by way of example and is not limited to the accompanying drawings, in which similar reference numerals indicate similar elements. Fig. 1 shows a schematic configuration diagram of a distributed antenna system according to an embodiment of the present invention; Fig. 2 shows a service load demand scenario in a distributed antenna system according to an embodiment of the present invention; Fig. 3 shows A schematic structural diagram of an adjustable coupler according to an embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of an adjustable coupler according to another embodiment of the present invention;

FIG. 5 shows a flowchart of a method for radio frequency power adjustment of a distributed antenna system including multiple antennas according to one embodiment;

Fig. 6 shows a flowchart of a method for radio frequency power adjustment of a distributed antenna system including multiple antennas according to one embodiment. detailed description

The detailed description of the drawings is intended as a description of presently preferred embodiments of the invention and is not intended to represent the only forms in which the invention can be practiced. It is to be understood that the same or equivalent functions can be accomplished by different embodiments, which are intended to be included within the spirit and scope of the present invention.

Those skilled in the art should be able to understand that the means and functions described here can be implemented using software functions combined with a programmed microprocessor and a general-purpose computer, and/or implemented using an application-specific integrated circuit (ASIC), and/or using discrete components to build a specific circuit to achieve. It should also be understood that although the invention has been described primarily in terms of methods and apparatus, the invention may also be embodied as computer program products and systems comprising a computer processor and memory coupled to the processor, wherein the memory is used to perform the Encode one or more procedures of the functions disclosed here.

FIG. 1 shows a schematic configuration diagram of a distributed antenna system 100 according to an embodiment of the present invention. As shown in the figure, the distributed antenna system 100 includes: a radio frequency module 20, a first controller 40, a radio frequency signal transmission network 30, and antennas 11-18.

The distributed antenna system 100 generally includes a base station device, and the radio frequency module 20 is a part of the base station device, and is used to generate radio frequency signals. Those skilled in the art should be able to understand that the base station or base station equipment referred to herein is, for example but not limited to, a Node B (Node B) or an evolved Node B (evolved Node B, eNB) in an LTE system or an LTE-A system. The technical solution is not limited to apply to the LTE system or the LTE-A system. The radio frequency module 20 is for example but not limited to a remote radio head (RemoteRadioHead, RRH) in the LTE-A system.

The antennas 11-18 adopt a distributed arrangement. For example but not limited to, antennas 11 and 12 are set on floor 1, antennas 13 and 14 are set on floor 2, antennas 15 and 16 are set on floor 3, and antennas 17 and 18 are set on floor 4.

The radio frequency signal transmission network 30 includes adjustable couplers 31-37. The radio frequency signal transmission network 30 is configured to transmit electrical signals from the radio frequency units to the antennas 11-18. Each antenna 11-18 is connected to the radio frequency module 20 via the radio frequency signal transmission network 30. The dotted line segment in the figure represents the connection between the radio frequency module 20, the radio frequency signal transmission network 30, and the antenna 11-18. wired connection between them. An adjustable coupler usually includes a signal input terminal, a straight-through terminal, a coupling terminal, and a control terminal. The control signal is received through the control terminal to adjust the coupling ratio or signal distribution ratio of the straight-through terminal and the coupling terminal. Preferably, the adjustable coupler can provide stepless and continuous adjustment of the coupling ratio or signal distribution ratio, that is, any coupling ratio or signal distribution ratio within the transformation ratio range can be obtained.

The first controller 40 is communicatively connected to the radio frequency signal transmission network 30, and is configured to control the adjustable couplers 31-37 so as to adjust the radio frequency power of the antennas 11-18. The solid line segment in the figure represents the communication connection between the first controller 40 and the radio frequency signal transmission network 30. These communication connections may be connected by a dedicated control network, such as but not limited to C-BUS or CAN-BUS (Controller Area Network- BUS ) and other field buses. C-BUS or CAN-BUS field bus is widely used in building automation network, the technology is mature and the cost is comparatively advantageous.

The first controller 40 may be integrated in the base station equipment, or may come from an independent external equipment. When the first controller comes from an independent external device, the external device and the base station device can also be communicatively connected through an OAM (Operation, Administration & Maintenance) interface to transmit data signals and control signals.

Fig. 2 shows a service load requirement scenario in a distributed antenna system according to an embodiment of the present invention. The distributed antenna system 200 shown in the figure includes a radio frequency module 20, a first controller 40, a second controller 42, a radio frequency signal transmission network 30, and antennas 11-14. For simplicity, the radio frequency signal transmission network 30 is simplified into a block. Antennas 11-14 are arranged in rooms A, B, C, and D respectively. The downlink radio frequency signal transmission under adaptive control has different requirements from the uplink received signal transmission, and an independent coupling network can be used to transmit uplink and downlink signals respectively.

The traffic load requirements of each room may be different. For example, three office devices requiring wireless data connection are arranged in room A, four personal mobile terminals appear in room B, two personal mobile terminals appear in room C, and there are no devices requiring wireless connection in room D.

The second controller 42 is configured to: determine actual traffic loads, expected traffic loads, or service quality requirements of antennas 11-14; determine antenna 1 according to actual traffic loads, expected traffic loads, or service quality requirements of antennas 11-14 1-14 respectively required radio frequency power; and adjusting the total radio frequency power of the radio frequency module 20 according to the respective required radio frequency power of the antennas 11-14. Usually, the second controller 42 can be integrated into the base station equipment together with the radio frequency module 20.

The actual service load indicates the service load of the user equipment that has connected to the base station equipment through a certain antenna and is currently receiving services such as voice and data. In other words, the actual traffic load represents the traffic load of the current active user equipment. The expected service load indicates the possible service load that has roamed registered and is in a connectable state with the base station equipment through a certain antenna. In other words, the expected traffic load represents all possible traffic loads of the current active user equipment and standby user equipment. For example, there are four user equipments in room B, only one of which is receiving service, and two user equipments are receiving service in room C, then the expected traffic load of antenna 12 is higher than that of antenna 13, while the actual traffic load of antenna 13 is The charge is higher than the antenna 12. The higher the (actual, expected) traffic load of the antenna, the higher the RF power it needs. Different types of services can be set with different service quality levels, even for the same type of service, different service quality levels can be set, and users can choose to pay more fees to enjoy higher levels of service quality. Generally, the higher the quality of service requirement, the higher the required radio frequency power. For the purpose of energy saving, the radio frequency power required by each antenna can be set to meet the actual service load requirements, to meet the expected service load requirements, or to meet the lower or lowest radio frequency power required by the quality of service, or can also be set to meet the requirements of the foregoing items Lower or even lowest RF power for mixed needs. Specifically, different levels can be divided for individual requirements or mixed requirements, and the corresponding radio frequency power is set for each level, and the required radio frequency power is determined correspondingly depending on which level the antenna requirement is at. When the actual service load of a certain antenna is zero or the expected service load is zero, for the purpose of energy saving, the radio frequency power required by the antenna can be set to a lower or even the lowest radio frequency power meeting the signal coverage requirement. Taking the case of the antenna 14 in room D in FIG. 2 as an example, the required radio frequency power can be set to a lower or even the lowest radio frequency power that meets the signal coverage requirement in room D. The total radio frequency power required by the radio frequency module 20 shown in FIG. 2 is the sum of the radio frequency power required by each antenna, and usually should also be included in signal transmission path loss compensation.

The radio frequency signal transmission network 30 includes a tunable coupler similar to that shown in FIG. 1 . The first controller 40 is configured to control the adjustable coupler in the radio frequency signal transmission network 30 according to the radio frequency power required by each of the plurality of antennas determined by the second controller 42. The topology structure of each coupling element in the radio frequency signal transmission network 30 is predetermined, and is usually a bifurcated tree with the first coupler directly connected to the radio frequency module 20 as the root node. Given such a topology and the radio frequency power required by each antenna, the coupling ratio or power distribution ratio of each coupling element can be determined accordingly. The first controller 40 sends corresponding control signals to each coupling element according to the required coupling ratio or power distribution ratio of each coupling element such as an adjustable coupler.

In some embodiments, the first controller 40 and the second controller 42 are integrated in the same base station device, and even both are the same controller. In some other embodiments, at least one of the first controller 40 and the second controller 42 is integrated into an independent external device outside the base station device.

FIG. 3 shows a schematic structural diagram of an adjustable coupler 300 according to an embodiment of the present invention. As shown in the figure, the adjustable coupler 300 adopts the structure of a directional coupler, including a main coupler 301, an auxiliary coupler 302 and an adjustable coupling component 309. The input end 303 and the through end 304 are respectively located at both ends of the main coupling 301. The coupling end 305 and the isolation end 306 are respectively located at both ends of the secondary coupling 302. The adjustable coupling part 309 can receive an electric control signal from the first controller 40 to gradually adjust the coupling parameters between the main coupling 301 and the secondary coupling 302, so that the through-port 304 and the coupling port 305 meet the required coupling ratio or power distribution ratio. Compared with traditional directional couplers, the adjustable coupler 300 is an active device. Port 303 serves as the input terminal of the adjustable coupler 300, and ports 304 and 305 serve as two output terminals.

FIG. 4 shows a schematic structural diagram of an adjustable coupler 320 according to another embodiment of the present invention. as the picture shows, The adjustable coupler 320 includes a circulator (circulator) 321 and an adjustable matching network 322. The circulator 321 has three ports 323, 324 and 326. In the absence of an external electric field, incident waves entering any port will sequentially enter the next port in the direction indicated by the arrow. Port 323 is used as an input port of the adjustable coupler 320, and ports 326 and 325 are used as two output ports. The adjustable matching network 322 is configured as, for example but not limited to, a T-type, L-type, or π-type matching network, and the matching network may include, for example but not limited to, electrically controlled adjustable capacitors or adjustable inductors. The adjustable matching network 322 can receive the electric control signal from the first controller 40 to gradually adjust the matching parameters, and change the echo reflectance of the incident wave from the port 324 of the circulator 321. The echo reflection of the matching network 322 will be incident on the port 324 of the circulator and exit from the port 326. Therefore, the coupling ratio or power distribution ratio between the output ports 325 and 326 is gradually adjusted. Tunable coupler 320 is also an active device.

Fig. 5 shows a flowchart of a method for radio frequency power adjustment of a distributed antenna system including multiple antennas according to one embodiment. The distributed antenna system further includes: a radio frequency module; a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the plurality of antennas, and the radio frequency signal transmission network includes at least one adjustable coupler. As shown in the figure, the method 500 includes steps 501, 502 and 503. In step 501, the actual traffic load, expected traffic load, or service quality requirement of the plurality of antennas is determined. In step 502, the radio frequency power required by each of the multiple antennas is determined according to the actual traffic load, expected traffic load, or service quality requirement of the multiple antennas. In step 503, the total radio frequency power of the radio frequency module is adjusted according to the radio frequency power required by each of the plurality of antennas. The total radio frequency power of the radio frequency module is the sum of the radio frequency power required by each antenna, and usually should also be included in the signal transmission path loss of the radio frequency signal transmission network. In one embodiment, step 502 includes: determining the radio frequency power required by an antenna as a lower or minimum radio frequency power that meets individual requirements or mixed requirements among its actual service load, expected service load, or service quality requirements. In another embodiment, step 502 includes: when the actual service load or the expected service load of an antenna is zero, determining the required radio frequency power as the lower or minimum radio frequency power that meets the signal coverage requirement. A specific implementation manner of the method 500 has been described in detail above in conjunction with the embodiment shown in FIG. 2 , and will not be repeated here.

Correspondingly, the distributed antenna system includes a base station device having a radio frequency module configured to implement the method 500. Fig. 6 shows a flowchart of a method for radio frequency power adjustment of a distributed antenna system including multiple antennas according to one embodiment. The distributed antenna system further includes: a radio frequency module; a radio frequency signal transmission network configured to transmit electrical signals from the radio frequency module to the plurality of antennas, and the radio frequency signal transmission network includes at least one adjustable coupler. As shown in the figure, the method 600 includes steps 601, 602 and 603. In step 601, the radio frequency power required by each of the multiple antennas is determined. In step 602, according to the radio frequency power required by each of the multiple antennas, the total radio frequency power required by the radio frequency module, and the topology of the radio frequency signal transmission network, determine the coupling ratio required by the at least one adjustable coupler . In step 603, according to the coupling required by the at least one adjustable coupler A combined ratio is used to send a control signal to adjust the at least one adjustable coupler. A specific implementation manner of the method 600 has been described in detail above in conjunction with the embodiment shown in FIG. 2 , and will not be repeated here.

Correspondingly, the distributed antenna system includes a base station device having a radio frequency module, which is configured to implement the method 600. While various embodiments of the invention have been illustrated and described, the invention is not limited to these embodiments. The ordinal numerals such as "first" and "second" appearing in the claims are only used to distinguish, and do not imply any specific order or connection relationship between the corresponding parts. The fact that a technical feature appears only in some claims or embodiments does not mean that it cannot be combined with other features in other claims or embodiments to achieve beneficial new technical solutions. Many modifications, changes, variations, substitutions and equivalents will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as described in the claims.

Claims (16)

1. Claims

   1. a kind of distributing antenna system, including：

   Multiple antennas；

   Radio-frequency module；

   Radio signal transmission network, is configured as transmitting electric signal from the radio-frequency module to the multiple antenna, the radio signal transmission network includes at least one variable coupler；

   First controller, it is communicatively connected to the radio signal transmission network, and is configured as at least one described variable coupler of control to adjust the radio-frequency power of the multiple antenna.

   2. distributing antenna system as claimed in claim 1, it is characterised in that the distributing antenna system also includes second controller, and it is configured as：

   Determine practical business load, expected service load or the QoS requirement of the multiple antenna；The radio-frequency power that the multiple antenna each needs is determined according to the practical business load of the multiple antenna, expected service load or QoS requirement；And

   The radio-frequency power each needed according to the multiple antenna adjusts the total radio frequency power of the radio-frequency module.

   3. distributing antenna system as claimed in claim 2, it is characterised in that first controller is configured as radio-frequency power that the multiple antenna according to determined by the second controller each needs come at least one variable coupler described in controlling.

   4. distributing antenna system as claimed any one in claims 1 to 3, it is characterised in that at least one described variable coupler includes circulator and adjustable matching network.

   5. distributing antenna system as claimed in claim 4, it is characterized in that, the circulator includes first port, second port and the 3rd port, and the adjustable matching network is coupled to the second port and is configured as adjusting match parameter according to the control signal of first controller.

   6. distributing antenna system as claimed any one in claims 1 to 3, it is characterised in that at least one described variable coupler includes the directional coupler for including adjustable coupling part.

   7. distributing antenna system as claimed any one in claims 1 to 3, it is characterised in that special control network connection is used between first controller and radio signal transmission network.

   8. distributing antenna system as claimed in claim 7, it is characterised in that the special control network includes C-BUS fieldbus networks or CAN-BUS fieldbus networks.

   9. a kind of method for the radio-frequency power adjustment for being used to include the distributing antenna system of multiple antennas, the distributing antenna system also includes：

   Radio-frequency module；

   Radio signal transmission network, is configured as transmitting electric signal from the radio-frequency module to the multiple antenna, the radio signal transmission network includes at least one variable coupler；

   Methods described includes：

   Determine practical business load, expected service load or the QoS requirement of the multiple antenna；

   The radio-frequency power that the multiple antenna each needs is determined according to the practical business load of the multiple antenna, expected service load or QoS requirement；And

   The radio-frequency power each needed according to the multiple antenna adjusts the total radio frequency power of the radio-frequency module.

   10. method as claimed in claim 9, it is characterised in that the step of determining the radio-frequency power that the multiple antenna each needs includes：The radio-frequency power that one antenna needs is defined as meeting to the relatively low or minimum radio-frequency power of the individual event demand or mixing demand in its actual service load, expected service load or QoS requirement.

   11. method as claimed in claim 9, it is characterised in that the step of determining the radio-frequency power that the multiple antenna each needs includes：When the practical business load or expected service load of antenna are zero, the radio-frequency power needed is defined as meeting the relatively low or minimum radio-frequency power of requirement for signal coverage.

   12. a kind of method for the radio-frequency power adjustment for being used to include the distributing antenna system of multiple antennas, the distributing antenna system also includes：

   Radio-frequency module；

   Radio signal transmission network, is configured as transmitting electric signal from the radio-frequency module to the multiple antenna, the radio signal transmission network includes at least one variable coupler；

   Methods described includes： Determine the radio-frequency power that the multiple antenna each needs；

   Total radio frequency power, the topological structure of the radio signal transmission network needed for the radio-frequency power that is each needed according to the multiple antenna, radio-frequency module, it is determined that the coupling ratio that at least one described variable coupler needs；And the coupling ratio needed according at least one described variable coupler to send control signal to adjust at least one described variable coupler.

   13. a kind of be used to include the base station equipment of the distributing antenna system of multiple antennas, the distributing antenna system also includes：Radio signal transmission network, is configured as transmitting electric signal from the radio-frequency module to the multiple antenna, the radio signal transmission network includes at least one variable coupler；

   The base station equipment includes radio-frequency module, and is configured as：

   Determine practical business load, expected service load or the QoS requirement of the multiple antenna；

   The radio-frequency power that the multiple antenna each needs is determined according to the practical business load of the multiple antenna, expected service load or QoS requirement；And

   The radio-frequency power each needed according to the multiple antenna adjusts the total radio frequency power of the radio-frequency module.

   14. base station equipment as claimed in claim 13, it is characterised in that the base station equipment is additionally configured to：The radio-frequency power that one antenna needs is defined as meeting to the relatively low or minimum radio-frequency power of the individual event demand or mixing demand in its actual service load, expected service load or QoS requirement.

   15. base station equipment as claimed in claim 13, it is characterised in that the base station equipment is additionally configured to：When the practical business load or expected service load of antenna are zero, the radio-frequency power needed is defined as meeting the relatively low or minimum radio-frequency power of requirement for signal coverage.

   16. a kind of be used to include the base station equipment of the distributing antenna system of multiple antennas, the distributing antenna system also includes：Radio signal transmission network, is configured as transmitting electric signal from the radio-frequency module to the multiple antenna, the radio signal transmission network includes at least one variable coupler；

   The base station equipment includes radio-frequency module, and is configured as：

   Determine the radio-frequency power that the multiple antenna each needs；

   Total radio frequency power, the topological structure of the radio signal transmission network needed for the radio-frequency power that is each needed according to the multiple antenna, radio-frequency module, it is determined that the coupling ratio that at least one described variable coupler needs；And

   The coupling ratio needed according at least one described variable coupler to send control signal with adjust it is described at least one Variable coupler.