WO2016082566A1 - Active antenna system (aas) self-healing method and apparatus - Google Patents

Abstract

Disclosed is an active antenna system (AAS) self-healing method and apparatus, which relate to the technical field of AAS self-healing. The method comprises the following steps: monitoring each transceiving channel connected to each antenna array in real time; and when it is detected that a certain transceiving channel is faulty, switching the antenna array connected to the faulty transceiving channel to a normal transceiving channel. The technical solution performs system self-healing in a hardware mode when a certain channel or multiple channels of an AAS are faulty, thereby improving the performance index of a cell.

Description

Method and device for self-healing of active antenna system AAS Technical field

This document relates to, but is not limited to, the field of AAS self-healing technology, and in particular, but not limited to, an active antenna system AAS self-healing method and apparatus.

Background technique

AAS is an active antenna system that integrates a transceiver and an antenna into a single hardware unit that implements beamforming using multiple channels. When the one-way (or multiple) path of the AAS fails, the beamforming of the AAS changes, which affects the cell coverage and reduces the network performance.

In the related art, it is common to compensate for the impact of the faulty path on the cell coverage by means of software, that is, through other normal path beam shaping weight changes. The implementation of the method not only needs to consider the current scene configuration, the specific failure link, the current beam shaping parameters and the current working parameters, but also involves complex system modeling and self-healing algorithms, resulting in the current AAS through software. It is very difficult to achieve self-healing.

As shown in FIG. 1 , in the related art, the antenna array of the AAS and the transceiver channel are 1:1 mapping or M:1 mapping, M>1, and each antenna element is connected to at most one transceiver channel. Thus, when the transceiver channel is abnormal, the normal array can no longer work.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims. (The following is a brief summary of subject matter that is described in greater detail herein. This summary is not intended to be limiting as to the scope of the claims.)

The embodiment of the invention provides a method and a device for self-healing of an active antenna system AAS, which solves the problem that when one (or multiple) paths of the AAS fail in the related art, the beamforming of the AAS changes, thereby affecting the cell. Coverage, reducing network performance issues.

According to an aspect of an embodiment of the present invention, a method for self-healing an active antenna system AAS is provided, including the following steps:

Real-time monitoring of each transceiver channel connecting each antenna element;

When it is detected that there is a failure of the transceiver channel, the antenna array connected to the failed transceiver channel is switched to the normal transceiver channel.

Optionally, the method further includes: before switching the antenna array connected to the failed transceiver channel to the normal transceiver channel,

Configuring a plurality of transceiver channels as a plurality of transceiver channel sharing groups, and each transceiver channel sharing group is configured with at least two transceiver channels;

The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel, and includes:

The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel in the same transceiver channel sharing group as the failed transceiver channel.

Optionally, the method further includes:

After switching the antenna element connected to the failed transceiver channel to the normal transceiver channel,

Calculating a channel phase of the normal transceiver channel to obtain a channel phase parameter;

The channel phase parameter is configured into the AAS, and the AAS is self-healing according to the configured channel phase parameter.

Optionally, calculating a channel phase of the normal transceiver channel, including:

Configuring a self-healing recovery parameter for the transceiver channel that detects the fault;

Calculating the center spacing of the antenna elements mapped by each transceiver channel;

The channel phase of each transceiver channel is calculated using the configured self-healing recovery parameters and the calculated center spacing of each antenna element.

Optionally, the self-healing recovery parameter includes: a faulty transceiver channel parameter, an antenna array center spacing parameter, and an antenna downtilt angle parameter.

According to another aspect of an embodiment of the present invention, an active antenna system AAS self-healing device is provided. Set, including:

a detection module configured to perform real-time monitoring of each transceiver channel connected to each antenna element;

The switching module is configured to switch the antenna array connected to the failed transceiver channel to the normal transceiver channel when a failure of the transceiver channel is detected.

Optionally, it also includes:

The configuration unit is configured to configure multiple transceiver channels into a plurality of transceiver channel sharing groups, and each transceiver channel sharing group configures at least two transceiver channels;

The switching module is configured to switch the antenna array connected to the failed transceiver channel to the normal transceiver channel by:

The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel in the same transceiver channel sharing group as the failed transceiver channel.

Optionally, it also includes:

a self-healing unit configured to calculate a channel phase of the normal transceiver channel, obtain a channel phase parameter, and configure the channel phase parameter into the AAS, so that the AAS performs according to the configured channel phase parameter Self-healing.

Optionally, the self-healing unit includes:

The configuration subunit is configured to configure a self-healing recovery parameter for the transceiver channel that detects the fault;

The calculation subunit is configured to calculate the antenna array center spacing mapped by each transceiver channel, and calculate the channel of each transceiver channel by using the configured self-healing recovery parameter and the calculated spacing of each antenna array center Phase

The self-healing subunit is configured to configure the channel phase parameter into the AAS to cause the AAS to self-heal according to the configured channel phase parameter.

Optionally, the self-healing recovery parameter includes a faulty transceiver channel parameter, an antenna array center spacing parameter, and an antenna downtilt angle parameter.

According to another aspect of an embodiment of the present invention, there is provided a computer storage medium having stored therein computer executable instructions for performing the method described above.

Compared with related technologies, the beneficial effects of the embodiments of the present invention are:

In the embodiment of the present invention, when a certain path (or multiple paths) of the AAS fails, the system self-healing is performed, and the performance index of the cell is improved.

Other aspects will be apparent upon reading and understanding the drawings and detailed description. (Other aspects will be appreciated upon reading and understanding the attached figures and detailed description)

BRIEF abstract

1 is a schematic diagram of a conventional AAS layout provided by the related art;

2 is a flowchart of a method for self-healing an active antenna system AAS according to an embodiment of the present invention;

3 is a schematic diagram of an apparatus for self-healing of an active antenna system AAS according to an embodiment of the present invention;

4 is a flowchart of AAS self-healing according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an AAS self-healing layout according to an embodiment of the present invention; FIG.

FIG. 6 is a flowchart of AAS fault self-healing according to an embodiment of the present invention.

Preferred embodiment of the invention

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 2 is a flowchart of a method for self-healing an active antenna system AAS according to an embodiment of the present invention. The AAS includes a plurality of antenna elements and a transceiver channel respectively connected to each antenna element, as shown in FIG. 2 . The method includes the following steps:

Step S201: performing real-time monitoring on each transceiver channel connecting each antenna element;

Step S202: When it is detected that there is a failure of the transceiver channel, the antenna array connected to the failed transceiver channel is switched to the normal transceiver channel.

Optionally, the embodiment of the present invention further includes: configuring multiple transceiver channels into multiple transceivers. The channel sharing group, each transceiver channel sharing group is configured with at least two transceiver channels; wherein the normal transceiver channel and the failed transceiver channel belong to the same transceiver channel sharing group.

Optionally, the method further includes: after switching the antenna array connected to the failed transceiver channel to the normal transceiver channel, calculating a channel phase of the normal transceiver channel to obtain a channel phase parameter; The channel phase parameter is configured into the AAS, and the AAS is self-healing according to the configured channel phase parameter. The channel phase of the normal transceiver channel is calculated, including: configuring a self-healing recovery parameter for the transceiver channel that detects the fault; calculating a center spacing of the antenna array mapped by each transceiver channel; using the configured self The recovery parameters and the calculated center spacing of each antenna element are calculated, and the channel phase of each transceiver channel is calculated. The self-healing recovery parameters include a faulty transceiver channel parameter, an antenna array center spacing parameter, and an antenna downtilt angle parameter.

FIG. 3 is a schematic diagram of an apparatus for self-healing an active antenna system AAS according to an embodiment of the present invention. As shown in FIG. 3, the method includes: a detecting module 301, configured to perform, for each transceiver channel connecting each antenna element. Real-time monitoring; the switching module 302 is configured to switch the antenna array connected to the failed transceiver channel to the normal transceiver channel when a failure of the transceiver channel is detected.

The embodiment of the present invention further includes: a configuration unit, configured to configure multiple transceiver channels into a plurality of transceiver channel sharing groups, and each transceiver channel sharing group configures at least two transceiver channels; wherein the normal transceiver The channel and the failed transceiver channel belong to the same transceiver channel sharing group. a self-healing unit configured to calculate a channel phase of the normal transceiver channel, obtain a channel phase parameter, and configure the channel phase parameter into the AAS, so that the AAS performs according to the configured channel phase parameter Self-healing.

Optionally, the self-healing unit includes: a configuration sub-unit configured to configure a self-healing recovery parameter for the transceiver channel that detects the fault; and a calculation sub-unit configured to calculate an antenna array center spacing mapped by each transceiver channel And calculating a channel phase of each transceiver channel by using the configured self-healing recovery parameter and the calculated spacing of each antenna element center; the self-healing subunit is configured to configure the channel phase parameter to the In the AAS, the AAS is self-healing according to the configured channel phase parameters. The self-healing recovery parameter includes a faulty transceiver channel parameter, an antenna array center spacing parameter, and an antenna downtilt angle parameter.

FIG. 4 shows an AAS self-healing flowchart provided by an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:

Step S401: system diagnosis;

The system detects each transceiver channel connected to the antenna element.

Step S402: determining whether the transceiver channel is faulty;

If it is determined that a channel failure occurs in the transceiver channel, the process proceeds to step S403. If it is determined that the transceiver channel has no channel failure, the process proceeds to step S404.

Step S403: The fault is self-healing;

The system performs a self-healing operation on the transceiver channel that detects the occurrence of the channel failure, and the self-healing operation process includes: switching the antenna array connected to the failed transceiver channel to the normal transceiver channel; The channel phase of the channel is calculated to obtain a channel phase parameter; the channel phase parameter is configured into the AAS, and the AAS is self-healing according to the configured channel phase parameter, and step S405 is performed;

Step S404: normal operation without failure;

When the system does not detect the failed transceiver channel, it will run.

Step S405: Self-healing.

The system performs a reporting operation on the self-healing result of the self-healing operation.

FIG. 5 is a schematic diagram of an AAS self-healing layout provided by an embodiment of the present invention. As shown in FIG. 5, the AAS is composed of a transceiver module and an antenna module, and the transceiver module is composed of multiple transceiver channels, and the antenna module includes Power switching network and antenna array. In the embodiment of the present invention, a power splitting network is added to the antenna, and the 1:1 or 1:M mapping between the AAS transceiver channel and the antenna array is changed to the N:M mapping. That is, multiple transceiver channels can be connected to multiple antenna elements, each antenna frame can be connected to multiple transceiver channels, and each transceiver channel can be connected to multiple antenna elements. Self-healing is achieved by reducing the coupling between the array and the transceiver channel to achieve higher reliability.

Beamforming is a combination of antenna technology and digital signal processing technology for directional signal transmission or reception. The beamforming in the antenna consists of four parts, including phase difference compensation for each channel of the transceiver, phase difference compensation of the passive part in the antenna, and phase difference caused by the downtilt angle in the antenna. Compensation and compensation of phase difference caused by circular or linear polarization of the antenna. Among them, the phase difference compensation of each channel of the transceiver can be realized by off-line phase calibration; the passive part phase difference compensation in the antenna can be realized by the antenna manufacturer providing the original data; the phase difference compensation caused by the downtilt angle in the antenna can pass the phase difference Formula calculation implementation; phase difference compensation caused by antenna circular polarization or linear polarization can be achieved by an additional phase compensation factor. The phase difference compensation caused by the downtilt angle is realized as follows: according to the physical layout of the antenna array, the phase difference Δδ caused by the downtilt angle of each unit is calculated as:

△δ=d*sinθ*360/λ

Where d is the array spacing; θ is the antenna preset tilt angle; λ is the wavelength and can be calculated based on the frequency.

FIG. 6 shows an AAS fault self-healing flowchart provided by an embodiment of the present invention. Multiple antenna arrays (groups) are connected to multiple transmission channels through a power splitting network, and the array can be switched to one of the channels through a switch. When a certain transmission channel is abnormal, the array can be self-healing by switching on the channel. For example, Array 1 can be connected to the TX1 or TX2 channel, while Array 2 can be connected to the TX1 or TX2 channel. If the TX1 channel is damaged, the array 1 can be switched to the TX2 channel through the control switch to achieve self-healing of the channel. When the channel failure is detected, as shown in Figure 6, the following steps are included:

Step S601: fault channel shielding and alternate channel switching;

The faulty channel is blocked for detecting the faulty transceiver channel, and the antenna array connected to the faulty transceiver channel is switched to the standby transceiver channel. After the handover is completed, the link hardware is opened.

Step S602: configuring a self-healing recovery parameter according to the fault channel;

The self-healing recovery parameter is configured according to the faulty transceiver channel, wherein the self-healing recovery parameter includes a fault transceiver channel, an antenna array spacing information, and an antenna default downtilt angle.

Step S603: Recalculating the center distance of the array;

According to the faulty transceiver channel, the center spacing of the array (group) mapped by each transceiver channel is recalculated. Optionally, the antenna elements mapped by the failed transceiver channel are mapped together to the normal transceiver channel that is switched, and the antenna frame mapped by the normal transceiver channel is mapped to the failed transceiver channel and the normal transceiver channel. The intersection of the antenna elements, the middle of the new antenna The heart spacing is calculated from the physical topology of all antenna elements, where the physical topology of the antenna elements is determined by the antenna itself.

Step S604: Recalculating the channel phase according to the center interval of the array;

Recalculate the phase of each channel according to the new antenna array layout. Optionally, calculating the channel phase difference Δδ is:

△δ=d*sinθ*360/λ

Where d is the array spacing; θ is the antenna preset tilt angle; λ is the wavelength and can be calculated based on the frequency.

Step S605: increasing the power of the non-faulty channel;

Step S606: Reconfigure the phase.

The calculated channel phase parameters are configured into the system, and the power of the alternate channel is increased to complete the self-healing.

In summary, when the transceiver channel 1 is damaged, the transceiver channel 2 is used for compensation. The gain of the transceiver channel 2 needs to be increased, and the phase of the transceiver channel 2 also needs to be recalculated. At the same time, the new calculation and the previous difference are the change of the interval of the array. It is only necessary to modify the center value of the array 2 to the average of the center of the new array 1 and the center of the array 2 and then recalculate.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.

In summary, the embodiments of the present invention have the following technical effects:

By adopting the hardware mode, the embodiment of the present invention can perform self-healing of the system to improve the communication index of the cell when the one-way (or multiple) path fails, which is relatively simple and easy to implement.

Although the invention has been described in detail above, the invention is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the invention. Therefore, modifications made in accordance with the principles of the invention are to be understood as falling within the scope of the invention.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

The above technical solution can perform system self-healing to improve the communication index of the cell when the one-way (or multiple) path fails, which is simple and easy to implement.

Claims (11)

A method for self-healing an active antenna system AAS includes the following steps: Real-time monitoring of each transceiver channel connecting each antenna element; When it is detected that there is a failure of the transceiver channel, the antenna array connected to the failed transceiver channel is switched to the normal transceiver channel. The method of claim 1 further comprising: Before switching the antenna array connected to the failed transceiver channel to the normal transceiver channel, the plurality of transceiver channels are configured as a plurality of transceiver channel sharing groups, and each transceiver channel sharing group configuration is at least two Transceiver channel The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel, and includes: The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel in the same transceiver channel sharing group as the failed transceiver channel. The method of claim 1 or 2, further comprising: After switching the antenna array connected to the failed transceiver channel to the normal transceiver channel, calculating the channel phase of the normal transceiver channel to obtain a channel phase parameter; The channel phase parameter is configured into the AAS, and the AAS is self-healing according to the configured channel phase parameter. The method of claim 3 wherein calculating the channel phase of said normal transceiver channel comprises: Configuring a self-healing recovery parameter for the transceiver channel that detects the fault; Calculating the center spacing of the antenna elements mapped by each transceiver channel; The channel phase of each transceiver channel is calculated using the configured self-healing recovery parameters and the calculated center spacing of each antenna element. The method of claim 4 wherein said self-healing recovery parameters comprise: Faulty transceiver channel parameters, antenna array center spacing parameters, and antenna downtilt angle parameters. An active antenna system AAS self-healing device, comprising: a detection module configured to perform real-time monitoring of each transceiver channel connected to each antenna element; The switching module is configured to switch the antenna array connected to the failed transceiver channel to the normal transceiver channel when a failure of the transceiver channel is detected. The apparatus of claim 6 further comprising: The configuration unit is configured to configure multiple transceiver channels into a plurality of transceiver channel sharing groups, and each transceiver channel sharing group configures at least two transceiver channels; The switching module is configured to switch the antenna array connected to the failed transceiver channel to the normal transceiver channel by: The antenna array connected to the failed transceiver channel is switched to the normal transceiver channel in the same transceiver channel sharing group as the failed transceiver channel. The apparatus according to claim 6 or 7, further comprising: a self-healing unit configured to calculate a channel phase of the normal transceiver channel, obtain a channel phase parameter, and configure the channel phase parameter into the AAS, so that the AAS performs according to the configured channel phase parameter Self-healing. The apparatus of claim 8 wherein said self-healing unit comprises: The configuration subunit is configured to configure a self-healing recovery parameter for the transceiver channel that detects the fault; The calculation subunit is configured to calculate the antenna array center spacing mapped by each transceiver channel, and calculate the channel of each transceiver channel by using the configured self-healing recovery parameter and the calculated spacing of each antenna array center Phase The self-healing subunit is configured to configure the channel phase parameter into the AAS to cause the AAS to self-heal according to the configured channel phase parameter. The apparatus of claim 9 wherein said self-healing recovery parameters comprise: Faulty transceiver channel parameters, antenna array center spacing parameters, and antenna downtilt angle parameters. A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 1 to 5.

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