WO2012167584A1

WO2012167584A1 - Detection system and device for distributed antenna system

Info

Publication number: WO2012167584A1
Application number: PCT/CN2011/083487
Authority: WO
Inventors: 王平晶; 沈俭
Original assignee: 华为技术有限公司
Priority date: 2011-12-05
Filing date: 2011-12-05
Publication date: 2012-12-13
Also published as: CN102907129A

Abstract

The embodiment of the invention provides a detection system and device for a distributed antenna system, which can implement the operation status monitoring for each antenna branch of the distributed antenna system. An antenna manager detects the service signal power at the antenna of the antenna branch; the antenna manager sends to a detector a feedback message which carries the antenna ID and the service signal power at the antenna of the antenna branch; after receiving the feedback message, the detector calculates the path loss of the antenna branch by the carried service signal power at the antenna and the service signal power at the signal source end, and determines whether the antenna branch works normally according to the path loss of the antenna branch.

Description

The present invention relates to the field of communications technologies, and in particular, to a detection system and apparatus for a distributed antenna system. Background Art In an era of increasing popularity of mobile communications, users have demanded higher quality of service, which has created a need for mobile communications in environments such as indoors, tunnels, and subways. If only the coverage of the outdoor base station is relied on, there may be problems in the indoor or subway station that the received signal is unstable or even unable to receive the signal. To solve this problem, a controllable distributed antenna system can be used. DAS (Distributed Antenna System) is a network consisting of two or more antennas and a common source. Due to the new antenna deployment method, indoor, tunnel and subway can be guaranteed. Signal coverage.

The distributed distributed antenna system needs to be periodically tested to obtain information such as parameters and signal strength of each distributed antenna, and analyze or adjust the working state of the antenna according to the obtained information to ensure the communication quality of the indoor coverage system. In addition to the source end, the distributed antenna system is a passive device. The operator usually uses the standing wave detection method for the detection of the passive part of the distributed antenna system. The standing wave detection method determines the operating state of the antenna system by adding a standing wave detecting circuit at the source end and based on the standing wave ratio on the measuring antenna path. The scheme using standing wave detection has a good detection effect in a single-channel antenna system, but it is difficult to apply to a distributed antenna system with multiple antenna branches. Summary of the invention

Embodiments of the present invention provide a detection system and apparatus for a distributed antenna system for efficiently and accurately detecting an operating state of each antenna branch in a distributed antenna system.

One aspect of the present invention provides a detection system for a distributed antenna system, the detection system including a plurality of antenna managers and a detector, wherein:

An antenna manager: electrically connected to an antenna feed cable of the distributed antenna system, storing an antenna ID of an antenna branch, wherein the antenna manager is configured to detect a service signal power at the antenna branch antenna, and The detector sends a feedback message, where the feedback message carries the antenna ID of the antenna branch and the service signal power of the antenna; The detector is electrically connected to the source end of the distributed antenna system, and configured to receive the feedback message, and calculate the power of the service signal at the antenna and the power of the service signal at the source end The path loss of the antenna branch determines whether the work of the antenna branch is normal according to the path loss of the antenna branch.

Another aspect of the present invention provides a detector for distributed antenna system detection, the detector comprising:

Receiver: configured to receive a feedback message, where the feedback message carries an ID of an antenna of an antenna branch and a service signal power at an antenna of the antenna branch; and

a processor: configured to calculate a path loss of the antenna branch by using a service signal power at the antenna and a power of the service signal at a source end, and determining, according to the path loss of the antenna branch, whether the antenna branch works normal.

Another aspect of the present invention provides an antenna manager for distributed antenna system detection, the antenna manager comprising:

a processor: detecting a power of a service signal at an antenna of the antenna branch, acquiring an antenna ID of the antenna branch from a memory, and generating a feedback message, where the feedback message carries an antenna ID and a location of the antenna branch The traffic signal power at the antenna;

Transmitter: configured to send the feedback message generated by the processor to a detector;

Memory: an antenna ID for storing the antenna branch;

Power Module: Used to power the antenna manager.

Another aspect of the present invention provides a detection system for a distributed antenna system, the detection system including a plurality of antenna managers and a detector, wherein:

The antenna manager is electrically connected to the antenna feed cable of the distributed antenna system, and stores an antenna ID of the antenna branch, where the antenna manager is configured to send a detection message to the detector according to a preset transmit power, where the detection is performed. The antenna ID of the antenna branch is carried in the message;

a detector: electrically connected to a source end of the distributed antenna system, configured to measure power of the detection message at the detector, and obtain an antenna ID of the antenna branch from the detection message, and utilize The detection message calculates the antenna branch path loss based on the power of the detector and the preset transmission power of the detection message, and determines whether the antenna branch works normally according to the antenna branch path loss.

Another aspect of the present invention provides a detector for distributed antenna system detection, the detector comprising: Receiver: configured to receive a detection message, where the detection message is sent according to a preset transmission power, where the detection message carries an antenna ID of an antenna branch of the distributed antenna system; and

a processor: configured to measure the detected message power received by the detector, and calculate the antenna branch path loss by using the detected message power and a preset transmit power of the detection message, according to the antenna branch The path loss determines whether the antenna branch works normally.

A further aspect of the present invention provides an antenna manager for distributed antenna system detection, the antenna manager comprising:

a processor: configured to generate a detection message, where the detection message carries an antenna ID of the antenna branch; and a transmitter: configured to send the detection message to the detector according to a preset transmission power;

Memory: an antenna ID for storing the antenna branch;

Power Module: Used to power the antenna manager.

By applying the detection system and device of the distributed antenna system provided by the embodiment of the present invention, the detector uses the feedback message or the detection message sent by each antenna manager to calculate the path loss of the corresponding antenna branch, and determines the antenna branch according to the path loss. Whether the road work is normal. The detection system, device and method realize the monitoring of the working states of the antenna branches of the distributed antenna system, overcome the deficiencies of the standing wave detection technology, and can separately detect each antenna branch, thereby realizing the distributed antenna system. Comprehensive monitoring, accurate test results and high real-time performance. 1 is a schematic diagram of a detection system of a distributed antenna system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a detector for detecting a distributed antenna system according to an embodiment of the present invention; A schematic diagram of an antenna manager for distributed antenna system detection provided by an embodiment of the invention;

4 is a schematic diagram of a detection system of a distributed antenna system according to another embodiment of the present invention; FIG. 5 is a schematic diagram of a detector for detecting a distributed antenna system according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of an antenna manager for detecting a distributed antenna system according to another embodiment of the present invention. Concrete In order to make the objects, the technical solutions and the advantages of the present invention more clearly understood, the technical solutions provided by the present invention are described in detail below with reference to the specific embodiments and the accompanying drawings.

In a distributed antenna system, except for the source end, other component parts are generally passive components such as a power splitter, a combiner, a coupler, an antenna, and the like. The embodiment of the invention provides a detection system for a distributed antenna system, as shown in FIG. 1 , which is a schematic diagram of a distributed antenna system including the detection system. The distributed antenna system mainly includes a source 101, a plurality of antennas 102, a detector 103, and a plurality of antenna managers 104. The detection system provided in this embodiment mainly includes a detector 103 and a plurality of antenna managers 104. The path from the source to any antenna and the corresponding antenna form an antenna branch. In Figure 1, only two antenna branches are schematically shown. The number of antenna branches of the actual distributed antenna system is configured as needed. The distributed antenna system also includes other functional components such as power splitters, combiners, couplers, feeder cables, etc., which are not explicitly labeled in Figure 1. The source end may be a repeater, a dry receiver, a base station, a remote radio unit RRU, a base transceiver station, a base station NodeB, etc., and the source end and the antenna are connected through a DAS network, and the DAS network mainly includes the above-mentioned power splitter and Roads, couplers, feeder cables, etc. In the embodiment of the present invention, the detector 103 is disposed at the source end, is electrically connected to the source end, and can be powered by a power source that supplies power to the source end, and the detector can receive an electrical signal from the antenna feed cable, the detector Can be built in the source side. The antenna manager 104 is disposed at the antenna and electrically connected to the antenna feed cable, and can send an electrical signal to the detector 103 via an antenna branch path composed of a feeder cable, a coupler, a combiner, a power splitter, and the like. Each antenna manager stores the ID of the antenna of the antenna branch. The antenna manager can be installed inside or outside the antenna. The power supply can be various. For example, it can use the energy supply from the feeder cable to obtain some wireless service signals, battery power, solar battery power, etc., if installed outside the antenna. It is also possible to obtain energy through the coil coupling antenna wireless service signal.

In the distributed antenna system, the source end sends a service signal to each antenna branch, and each antenna service signal has a certain power at the source end, the power value source is known and can notify the detector, and the service signal passes. When the antenna branch path arrives at the antenna, there is a path loss. The power of the service signal at the source end and the power of the service signal at the antenna can be used to obtain the path loss of the corresponding antenna branch. For example, the service signal is in the source. The power of the terminal is subtracted from the power of the service signal at the antenna to obtain the path loss of the corresponding antenna branch. When the source end of the distributed antenna system sends a service signal to each antenna, the antenna manager 104 is configured to detect the power of the service signal at the antenna branch antenna, and send a feedback message to the detector, where the feedback message carries the antenna. The ID of the antenna of the branch and the power of the service signal at the antenna, the detector 103 is configured to receive the feedback message, and calculate the path of the antenna by using the power of the service signal at the antenna carried therein and the power of the service signal at the source end. Loss, according to the path loss of the antenna branch, the corresponding antenna branch can be judged Is the work normal? For example, when the path loss of the antenna branch is less than the preset threshold, the antenna branch can be considered to be working normally, and the normal state information of the antenna branch can be given. Otherwise, the antenna branch can be considered to be abnormal and can be given Status information of the antenna branch abnormality.

In the embodiment of the present invention, in order to prevent information collision or congestion caused by multiple antenna managers simultaneously sending feedback messages to the detector, each antenna manager may be coordinated through a coordination mechanism, for example, when the antenna manager measures the signal at the corresponding antenna. After the power, the feedback message is sent to the detector after a random delay.

As shown in FIG. 2, the detector 103 may specifically include:

The receiver 1031 is configured to receive a feedback message, where the feedback message carries an ID of an antenna of the antenna branch and a service signal power at an antenna of the antenna branch.

The processor 1032 calculates the antenna branch path loss by using the service signal power at the antenna and the power of the service signal at the source end, and determines whether the antenna branch works normally according to the path loss.

Optionally, the detector 103 may further include a memory 1033: configured to store each antenna branch working state information.

The above detector is electrically connected to the source end, can be built in the source end, and can be powered by a power source that supplies power to the source. The processor 1032 can determine whether the corresponding antenna branch works normally according to the path loss of the antenna branch. For example, when the path loss of the antenna branch is less than the preset threshold, the antenna branch can be considered to be working normally, and the normal state information of the antenna branch can be given, and the state information is stored in the memory, and the antenna can be considered as the antenna. The branch works abnormally, and can give state information of the antenna branch abnormality, and store the above state information in the memory.

As shown in FIG. 3, the antenna manager 104 may specifically include:

The processor 1041 is configured to detect a service signal power at an antenna of the antenna branch, obtain an ID of the antenna of the antenna branch from the memory 1043, and generate a feedback message, where the feedback message carries an antenna ID of the antenna branch And traffic signal power at the antenna.

Transmitter 1042: operative to send the feedback message generated by the processor to the detector.

Memory 1043: an antenna ID for storing the antenna branch.

Power Module 1044: Used to power the above antenna manager.

The above antenna manager can be mounted inside or outside the antenna.

The power module 1044 can supply power to the antenna manager in multiple manners. For example, the antenna manager can be powered by acquiring part of the service signal energy from the antenna feed cable of the antenna branch, or by using a battery or a solar energy. The manager supplies power. If the above antenna manager is installed outside the antenna, it can be online. The loop-coupled antenna wireless service signals acquire energy.

By applying the detection system of the distributed antenna system provided by the embodiment of the present invention, the detector receives the feedback message sent by the antenna manager, according to the power of the service signal at the antenna carried in the feedback message and the power of the service signal at the source end. Calculate the path loss of the antenna branch, and judge whether the antenna branch works normally according to the path loss. The detection system realizes the monitoring of the working states of the antenna branches of the distributed antenna system, overcomes the deficiencies of the standing wave detection technology, and can separately detect each antenna branch, thereby realizing comprehensive monitoring of the distributed antenna system. The test results are accurate and the real-time performance is high.

Another embodiment of the present invention provides a distributed antenna system detection system having a structure similar to that of the distributed antenna system of the foregoing embodiment, and mainly includes a detector and a plurality of antenna managers. As shown in FIG. 4, which is a schematic diagram of a distributed antenna system including the detection system, the distributed antenna system has a structure similar to that of the distributed antenna system in the foregoing embodiment, and mainly includes a source end 401, a plurality of antennas 402, and a Detector 403 and a plurality of antenna managers 404. The path from the source to any antenna and the corresponding antenna form an antenna branch. In Figure 4, only two antenna branches are schematically shown. The number of antenna branches of the actual distributed antenna system is configured as needed. In addition, the distributed antenna system also includes other functional components, such as a power splitter, a combiner, a coupler, a feeder cable, etc., which are not explicitly labeled in FIG. The source end may be a repeater, a dry receiver, a base station, a remote radio unit RRU, a base transceiver station, a base station NodeB, etc., and the source end and the antenna are connected through a DAS network, and the DAS network mainly includes the above-mentioned power splitter and Roads, couplers, feeder cables, etc. In this embodiment, the detector 403 is disposed at the source end, is electrically connected to the source end, and can be powered by a power source that supplies power to the source end, and the detector can receive an electrical signal from the antenna feed cable, and the detector Can be built in the source side. The antenna manager 404 is disposed at the antenna and electrically connected to the antenna feed cable, and can send an electrical signal to the detector 403 via an antenna branch path composed of a feeder cable, a coupler, a combiner, a power splitter, and the like. Each antenna manager stores the antenna ID of the antenna branch. The antenna manager can be installed inside or outside the antenna. The power supply can be various. For example, it can use the energy supply from the feeder cable to obtain some wireless service signals, battery power, solar battery power, etc., if installed outside the antenna. It is also possible to obtain energy through the coil coupling antenna wireless service signal.

In this embodiment, the antenna manager 404 is configured to send a detection message to the detector 403, where the detection message carries the antenna ID of the antenna branch managed by the antenna manager, and each antenna manager sends the detection according to a preset transmission power. The message may be: the detector may store the preset transmit power of the detection message sent by each antenna manager, or may be notified by the antenna manager to the preset transmit power, for example, carrying the preset transmit power in the detection. A message or other message is sent to the detector. Detector 403 is used to measure the above detection The power of the message is at the detector, and the antenna ID of the antenna branch carried by the detection message is obtained from the detection message, and the antenna branch is calculated by using the detection message at the power of the detector and the preset transmission power of the detection message. Path loss, for example, subtracting the preset transmit power of the detection message from the power of the detection message at the detector to obtain a path loss of the corresponding antenna branch, and determining the antenna branch operation according to the path loss of the antenna branch Is it normal? For example, when the path loss of the antenna branch is less than the preset threshold, the antenna branch can be considered to be working normally, and the normal state information of the antenna branch can be given. Otherwise, the antenna branch can be considered to be abnormal and can be given Status information of the antenna branch abnormality.

In this embodiment, in order to prevent multiple antenna managers from sending detection messages to the detectors at the same time, causing information collision or congestion, each antenna manager may be coordinated through a coordination mechanism, for example, setting each antenna manager to send detections at different time points. Message.

As shown in FIG. 5, the detector 403 may specifically include:

The receiver 4031 is configured to receive a detection message, where the detection message is sent according to a preset transmission power, where the detection message carries an antenna ID of an antenna branch of the distributed antenna system.

The processor 4032 is configured to measure power of the detection message received by the detector, and calculate the path loss of the antenna branch by using the detection message power and the preset transmission power of the detection message, according to the antenna branch The path loss determines whether the antenna branch works normally.

Optionally, the detector 403 may further include a memory 4033: configured to store the preset transmission power of the detection message.

The processor 4032 can determine whether the antenna branch works normally according to the path loss of the antenna branch. For example, when the path loss of the antenna branch is less than the preset threshold, the antenna branch can be considered to be working normally, and the normal state information of the antenna branch can be given. Otherwise, the antenna branch can be considered to be abnormal and can be given Status information of the antenna branch abnormality. The memory 4033 can be further configured to store state information of the antenna branch. The processor may obtain the preset transmission power of the foregoing detection message from the memory, or obtain the preset transmission power directly from the detection message, provided that the detection message carries its preset transmission power.

As shown in FIG. 6, the antenna manager 404 may specifically include:

The processor 4041 is configured to generate a detection message, where the detection message carries an antenna ID of the antenna branch. Optionally, the detection message may further carry a preset transmission power of the detection message.

The transmitter 4042 is configured to send the foregoing detection message to the detector according to a preset transmission power.

Memory 4043: Antenna ID for storing the above antenna branch.

Power module 4044: used to power the above antenna manager. The above antenna manager can be installed inside the antenna or outside the antenna.

The power module 4044 can supply power to the antenna manager in multiple manners. For example, the antenna manager can be powered by acquiring part of the service signal energy from the antenna feed cable of the antenna branch, or by using a battery or a solar energy. The antenna manager supplies power. If the antenna manager is installed outside the antenna, energy can be obtained by the wireless communication signal of the coil coupling antenna.

By applying the detection system of the distributed antenna system provided by the embodiment, the detector receives the detection message sent by each antenna manager according to the preset transmission power, and calculates the transmission power according to the power of the detector and the detection message according to the detection message. Out of the path loss of the antenna branch, it is judged whether the antenna branch works normally according to the path loss. The detection system realizes the monitoring of the working states of the antenna branches of the distributed antenna system, overcomes the deficiencies of the standing wave detection technology, and can separately detect each antenna branch, thereby realizing comprehensive monitoring of the distributed antenna system. The test results are accurate and the real-time performance is high.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, or the like. A number of instructions are included to cause a computer device, which may be a personal computer, server, or network device, to perform the methods described in various embodiments of the present invention or in certain portions of the embodiments.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that The technical solutions are described as being modified, or equivalents are replaced by some of the technical features; and such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A detection system for a distributed antenna system, characterized in that the detection system comprises a plurality of antenna managers and a detector, wherein:

The antenna manager is electrically connected to an antenna feed cable of the distributed antenna system, and stores an antenna ID of an antenna branch, where the antenna manager is configured to detect a service signal power at the antenna branch antenna, And sending a feedback message to the detector, where the feedback message carries an antenna ID of the antenna branch and a service signal power at the antenna;

The detector is electrically connected to the source end of the distributed antenna system, and configured to receive the feedback message, and utilize the power of the service signal at the antenna and the power of the service signal at the source end Calculating the path loss of the antenna branch, and determining whether the work of the antenna branch is normal according to the path loss of the antenna branch.

2. The system according to claim 1, wherein the detector determines whether the operation of the antenna branch is normal according to the path loss of the antenna branch:

When the path loss of the antenna branch is less than a preset threshold, it is considered that the antenna branch works normally, and the antenna branch is considered to be abnormal.

3. The system according to claim 1, wherein the antenna manager detects the power of the service signal at the antenna of the antenna, and sends the feedback message to the detector after a random delay.

The system according to any one of claims 1 to 3, wherein the antenna manager is installed inside or outside the antenna.

5. The system of claim 4, wherein the antenna manager utilizes energy supply or battery powered or solar powered power to obtain a portion of the wireless service signal from the antenna branch feed cable.

6. The system according to claim 5, wherein if the antenna manager is installed outside the antenna, the antenna is configured by the antenna manager to obtain energy by coupling the antenna wireless service signal to the antenna management. Power supply.

A detector for detecting a distributed antenna system, wherein the detector comprises: a receiver: configured to receive a feedback message, wherein the feedback message carries an ID of an antenna of an antenna branch and the antenna Service signal power at the antenna of the branch; and

The detector of claim 7, wherein the detector further comprises: a memory: configured to store the antenna branch operating state information.

The detector according to claim 8, wherein the processor determines whether the working of the antenna branch is normal according to the path loss of the antenna branch:

When the path loss of the antenna branch is less than a preset threshold, it is considered that the antenna branch works normally, and the state information of the antenna branch is normal, and the state information is stored in the memory, and vice versa. It is considered that the antenna branch works abnormally, and gives state information of the antenna branch abnormality, and stores the state information in the memory.

The detector according to any one of claims 7 to 9, wherein the detector is electrically connected to the source end of the distributed antenna system and is powered by a power source for supplying power to the source.

11. An antenna manager for distributed antenna system detection, wherein the antenna manager comprises:

Memory: an antenna ID for storing the antenna branch;

Power Module: Used to power the antenna manager.

The antenna manager according to claim 11, wherein the antenna manager is installed inside or outside the antenna of the antenna branch.

13. A detection system for a distributed antenna system, wherein the detection system comprises a plurality of antenna managers and a detector, wherein:

The antenna manager is electrically connected to an antenna feed cable of the distributed antenna system, and stores an antenna ID of an antenna branch, where the antenna manager is configured to send a detection message to the detector according to a preset transmit power. The detection message carries an antenna ID of the antenna branch;

The detector is electrically connected to a source end of the distributed antenna system, configured to measure power of the detection message at the detector, and obtain an antenna ID of the antenna branch from the detection message And determining, by using the detection message, the antenna branch path loss in the power of the detector and the detection message preset transmission power, and determining whether the antenna branch work is normal according to the antenna branch path loss.

14. The system of claim 13 wherein: said detector is based on said antenna branch The path loss determines whether the antenna branch works normally:

15. The system of claim 13 wherein the different antenna managers transmit the detection message at different points in time.

The system according to claim 13, wherein the detector stores a preset transmission power of the detection message or the antenna manager notifies the detector of the detection message to preset a transmission power.

17. A system according to any of claims 13 to 16, wherein the antenna manager is mounted inside or outside the antenna of the antenna branch.

18. The system of claim 17 wherein said antenna manager utilizes energy or battery powered or solar powered power for obtaining a portion of a wireless service signal from said antenna branch feeder cable.

The system according to claim 18, wherein if the antenna manager is installed outside the antenna, the antenna manager may further obtain energy by coupling the antenna wireless service signal to the antenna. The manager is powered.

A detector for detecting a distributed antenna system, wherein the detector comprises: a receiver: configured to receive a detection message, where the detection message is sent according to a preset transmission power, and the detection message carries An antenna ID of an antenna branch of the distributed antenna system; and

The detector according to claim 20, wherein the detector further comprises: a memory: a preset transmission power for storing the detection message.

The detector according to claim 21, wherein the processor determines, according to the path loss of the antenna branch, whether the operation of the antenna branch is normal:

When the path loss of the antenna branch is less than a preset threshold, it is considered that the antenna branch works normally, and the state information of the antenna branch is normal, and the antenna branch is considered to be abnormal, and State information of the antenna branch abnormality;

The memory is further configured to store state information of the antenna branch.

The detector according to any one of claims 20 to 22, wherein the detector is electrically connected to the source end of the distributed antenna system, and is powered by a power source that supplies power to the source terminal.

24. An antenna manager for distributed antenna system detection, wherein the antenna manager comprises:

Memory: an antenna ID for storing the antenna branch;

Power Module: Used to power the antenna manager.

The antenna manager according to claim 24, wherein the detection message generated by the processor further carries a preset transmission power of the detection message.

The antenna manager according to any one of claims 24 or 25, wherein the antenna manager is installed inside or outside the antenna of the antenna branch.