WO2011160375A1

WO2011160375A1 - System, apparatus and method for adjusting cell coverage area by using antennae

Info

Publication number: WO2011160375A1
Application number: PCT/CN2010/078087
Authority: WO
Inventors: 王博
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-25
Filing date: 2010-10-25
Publication date: 2011-12-29
Also published as: CN102300221A; CN102300221B

Abstract

A system, apparatus and method for adjusting cell coverage area by using antennae are disclosed in the present invention. The system includes electrical tilt antennae, a Base Band Unit (BBU) and Remote Radio Units (RRUs) in a base station apparatus, and at least one of the RRUs is used as the RRU of a Central Control Unit (CCU), wherein the BBU monitors parameters reflecting the load status of a cell in real time, and if the monitored parameters exceed predefined critical values, then calculates and obtains the obliquity at the next time of the antenna corresponding to the cell, and forms an antenna instruction which is sent to the corresponding electrical tilt antenna through the RRU used as the CCU; the electrical tilt antenna adjusts the obliquity of the antenna according to the received antenna instruction. The present invention adaptively adjusts the antenna obliquity by monitoring the cell parameters, and thus the response to the change of the cell load status is sensitive, and the adjustment of the antenna obliquity is more exact.

Description

System, device and method for adjusting cell coverage by using antenna

Technical field

The present invention relates to a technology for improving the quality of network services in mobile communications, and more particularly to a system, apparatus and method for adjusting cell coverage using an antenna.

Background technique

In order to solve the problem that the current mobile communication network has high call loss, high call loss in the dense area of the base station, and large interference, one solution is to shorten the station distance, that is, reduce the coverage area of the cell. Reducing cell coverage not only reduces the traffic volume of the cell, reduces the call loss, but also reduces the interference to the neighboring cell. A relatively simple implementation method is to reduce the coverage of the cell by adjusting the downtilt angle of the antenna. However, when the ordinary mechanical antenna is tilted at a large angle, the horizontal directional pattern of the antenna is severely deformed, causing interference to the adjacent area, and the adjustment of the tilt angle is inconvenient and the accuracy is also poor.

When the cell coverage is actually adjusted by the antenna downtilt, manual road test is needed to understand the cell edge coverage every time it is adjusted, until the demand is stopped. For the adjustment of the antenna tilt angle, although increasing the tilt angle can reduce the interference, it also reduces the resource utilization. Therefore, the choice of the optimal downtilt angle of the antenna is very important. The optimal downtilt angle of the antenna not only enables the cell to meet the performance requirements, but also enables the resources to be fully utilized.

At present, the electronically tuned antenna used in mobile communication changes the phase of the composite collinear oscillator by changing the phase and amplitude of the collinear array antenna, thereby realizing the adjustment of the antenna tilt angle. Since the antenna level and the vertical component field strength are simultaneously changed, it is ensured that the antenna directivity pattern after the tilt adjustment is not changed, and the cell coverage can be reduced while avoiding interference. In addition, the ESC antenna allows the system to adjust the tilt angle of the vertical directional pattern without stopping the machine. It can monitor the adjustment effect in real time, and the tilt angle adjustment accuracy is high, which can be finely adjusted for the network.

Although the ESC antenna is introduced to solve the cell coverage problem, the adjustment of the ESC antenna still needs to be considered as operation, and the advantages of the ESC antenna cannot be fully utilized, so that the current mobile communication network cannot be effectively solved in the high traffic volume, the base station. The problem of high call loss and large interference in dense areas. Summary of the invention

The technical problem to be solved by the present invention is to provide a system, device and method for adjusting cell coverage by using an antenna, which can realize adaptive adjustment of an electric adjustment antenna and fully utilize the advantages of the electric adjustment antenna in adjusting the coverage of the small area.

In order to solve the above technical problem, the present invention provides a system for adjusting cell coverage by using an antenna, including an electrical tune antenna, a baseband unit in a base station device, and a radio remote unit, at least one of the radio remote units being centered The remote unit of the control unit, in which:

The baseband unit is configured to: monitor a parameter of a load cell status of the reaction cell collected by the radio remote unit in real time, and if the monitored parameter exceeds a preset threshold, calculate a tilt angle of the next antenna of the corresponding cell, and form an Sending an antenna command to the radio remote unit as the central control unit;

The radio remote unit as the central control unit is configured to distribute the received antenna command to the corresponding electrical adjustment antenna;

The ESC antenna is configured to adjust an inclination of the antenna according to the received antenna command.

Preferably, the baseband unit includes a cell parameter monitoring module, an antenna control management module, and a database, which are sequentially connected, and the radio remote unit as the central control unit includes an antenna command distribution module;

The cell parameter monitoring module is configured to: after initializing and calibrating antenna parameters of each electrical tune antenna, real-time monitoring parameters of the reaction cell load status, including the number of service calls and the number of rejected calls, call loss rate, and cell edge One or more of the user's signal-to-interference ratios; if an event exceeds a threshold value, the event is reported to the antenna control management module;

The antenna control management module is configured to: after receiving the event reported by the cell parameter monitoring module, obtain an antenna configuration information of a corresponding cell from the database query, and calculate corresponding according to the antenna configuration information and a predetermined policy. The tilt angle of the antenna at the next moment, and the antenna tilt information is encapsulated into the antenna command according to an antenna interface protocol, and the antenna position information is sent to the antenna command distribution module;

The database is configured to save antenna configuration information of a cell under the jurisdiction of the base station; The antenna command distribution module is configured to distribute the antenna command to a corresponding electrical tune antenna according to the antenna position information parsed from the received antenna command.

Preferably ,

The antenna control management module is further configured to: after receiving the event, determine a step angle of the antenna tilt adjustment according to a predetermined strategy, and calculate, according to a tilt angle of the current antenna of the corresponding antenna, that the tilt angle of the corresponding antenna is equal to the corresponding antenna. The angle of inclination of the current moment plus the step angle.

Preferably, the electronically modulated antenna includes an antenna command execution module configured to invoke a driving module to adjust an inclination of the antenna according to the antenna tilt information parsed from the received antenna command.

Preferably, the baseband unit further includes an interaction interface, configured to forward, to the cell parameter monitoring module, various parameters of the reaction cell load status collected and fed back by the radio remote unit.

In order to solve the above technical problem, the present invention provides a base station apparatus for adjusting a cell coverage by using an antenna, including: a baseband unit and a radio remote unit, wherein at least one of the radio remote units is a radio remote unit as a central control unit a unit, where: the baseband unit is configured to: monitor a parameter of a load cell status of the reaction cell collected by the radio remote unit in real time, and if the monitored parameter exceeds a preset threshold, calculate a next time of acquiring the corresponding antenna of the cell. Inclining, and forming an antenna command to be sent to the radio remote unit as the central control unit;

The radio remote unit as the central control unit is arranged to distribute the received antenna command to the corresponding electronically modulated antenna.

The cell parameter monitoring module is configured to monitor, in real time, parameters of the load status of the reaction cell after performing antenna parameter initialization and calibration on each electrical tune antenna, including the number of service calls and the rejection One or more of the call number, the call loss rate, and the cell edge user's signal-to-interference ratio; if the parameter exceeds the threshold value event, the event is reported to the antenna control management module;

The database is configured to store antenna configuration information of a cell under the jurisdiction of the base station; and the antenna command distribution module is configured to distribute the antenna command according to the antenna position information parsed from the received antenna command Give the corresponding ESC antenna.

In order to solve the above technical problem, the present invention provides an electrical antenna device for adjusting a cell coverage by using an antenna, including: an antenna instruction execution module and a call driver module, where

The antenna instruction execution module is configured to invoke the driving module according to the antenna tilt information parsed from the antenna command received by the radio remote unit as the central control unit in the base station; and

The drive module is configured to adjust the tilt of the antenna.

Preferably ,

The antenna instruction execution module is further configured to: after the driving module is configured to complete the adjustment of the tilt of the antenna, return the antenna adjustment response information to the baseband unit in the base station by using the radio remote unit as the central control unit.

In order to solve the above technical problem, the present invention provides a method for adjusting cell coverage by using an antenna. Law, including:

The baseband unit in the base station monitors the parameters of the reaction cell load status collected by the radio remote unit in the base station in real time. If the parameter exceeds a preset threshold, the dip angle of the corresponding antenna of the corresponding cell is calculated, and an antenna command is formed. Transmitting to a radio remote unit as a central control unit in the base station;

The radio remote unit as the central control unit distributes the received antenna command to the corresponding electrical adjustment antenna;

The electrically adjustable antenna adjusts an inclination of the antenna according to the received antenna command.

Preferably, the baseband unit in the base station monitors, in real time, a parameter of a load cell status of the reaction cell collected by the radio remote unit in the base station, and if the parameter exceeds a preset threshold, calculates an inclination of the next moment of the corresponding antenna of the acquiring cell. And forming an antenna command sent to the radio base unit in the base station as a central control unit includes:

After the baseband unit initializes and calibrates the antenna parameters of each electrical tune antenna, the parameters of the reaction cell load status are monitored in real time, including the number of service calls and the number of rejected calls, the call loss rate, and the cell edge user-to-interference ratio. One or more

If the parameter exceeds the threshold, the antenna configuration information of the corresponding cell is obtained by querying the saved antenna configuration information;

Calculating, according to the antenna configuration information and a predetermined strategy, a tilt angle of a corresponding antenna at a next moment, and encapsulating the antenna tilt information into the antenna command according to an antenna interface protocol, and adding antenna position information to the radio frequency pull as the central control unit Far unit

The step of distributing the received antenna command to the corresponding ESC antenna by the radio remote unit as the central control unit includes:

The radio remote unit as the central control unit distributes the antenna command to the corresponding electrical adjustment antenna according to the antenna position information parsed from the received antenna command;

The step of adjusting the tilt angle of the antenna according to the received antenna command by the electrical adjustment antenna includes:

After receiving the antenna command, the ESC antenna adjusts the tilt angle of the antenna according to the antenna tilt information analyzed from the antenna command. Preferably, the step of calculating the inclination of the next moment of the corresponding antenna according to the antenna configuration information and the predetermined policy includes:

Determining a first step angle of the antenna tilt adjustment according to a predetermined strategy, and calculating, according to the inclination angle of the current antenna at the current moment, the inclination of the next moment of the corresponding antenna is equal to the inclination of the current moment of the corresponding antenna plus the first step angle.

Preferably, the method further comprises:

After the electrical adjustment antenna completes the adjustment of the tilt angle of the antenna, returning the antenna adjustment response information to the baseband unit by using the radio remote unit as the central control unit;

After receiving the antenna adjustment response information, the baseband unit sets and starts a timer; if the timer expires, it estimates that the current condition of the cell is good, and determines a second step angle of the antenna tilt adjustment according to a predetermined policy. Calculating, according to the second step angle, that the inclination angle of the next moment of acquiring the corresponding antenna is equal to the inclination angle of the current moment of the corresponding antenna minus the second step angle;

If the timer does not time out and knows that the parameter exceeds the threshold, the timer is turned off, and the current condition of the cell is estimated to be not good, and the inclination of the next moment of the corresponding antenna is calculated according to the first step angle, or according to The predetermined strategy determines a third step angle that is smaller than the first step angle and calculates a tilt angle at which the next moment of acquiring the corresponding antenna is equal to the tilt angle of the current moment of the corresponding antenna plus the third step angle.

Preferably, the method further comprises:

Each neighboring cell of the jurisdiction of the failed base station is reduced by a corresponding antenna tilt angle to increase the respective coverage range until the number of service calls of the neighboring cell is sufficiently large or the neighboring cell interference of the neighboring cell increases So far.

The system, device and method for adjusting cell coverage by using an antenna provided by the invention enable the base station to adaptively adjust the antenna tilt angle by monitoring the cell parameters, thereby eliminating the trouble of the artificial climbing tower and the human road test operation, and the adjustment The method is more sensitive to changes in the network load condition, and the adjustment of the antenna downtilt angle is more accurate. By operating the cell coverage adaptive adjustment strategy, each base station can ensure that the downtilt angle of most base station antennas is optimal, and the network service quality can be ensured, and the effective utilization of network resources can be achieved. Moreover, the invention can deal with some abnormalities in the network. In the case of a base station failure or a new base station, the system can complete reasonable coverage of each cell through automatic adjustment in a short period of time, without manual intervention, and saves more time for manpower maintenance and adjustment of the base station. BRIEF abstract

FIG. 1 is a schematic diagram of a connection of an electric adjustment antenna network used in a mobile communication network;

2 is a schematic structural diagram of an embodiment of a system for adjusting cell coverage by using an antenna according to the present invention; FIG. 3 is a flowchart of an embodiment of a method for adjusting cell coverage by using an antenna according to the present invention; Schematic diagram of the interaction process of each module in the system. Preferred embodiment of the invention

The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. The following examples are intended to illustrate and explain the present invention and are not intended to limit the invention.

As shown in FIG. 1, it is a connection mode of an electric adjustment antenna network used by a mobile communication network. The base station includes a baseband unit (BBU) 110 and a remote radio unit (RRU) 120, as shown in the dotted line in FIG. 1; wherein the BBU 110 is used for baseband processing and multi-band processing. The RRUs 120 are used for centralized control; the RRUs 120 are used for radio frequency resource management, and the plurality of RRUs 120 can be connected by a fiber optic cascade to form a chain topology. The electrical adjustment antenna (ANT) 130 is connected to the RRU 120 through a radio frequency (RF) cable, and the plurality of electrically adjustable antennas 130 can be cascaded through an Antenna Interface Standards Group (AISG) cable (or other antenna protocol cable). Forming a chain topology, the RRU 120 connecting the AISG cable serves as a Central Control Unit (CCU) and is connected to the BBU 110 through optional fibers.

FIG. 1 is only a networking connection mode of an electric adjustable antenna used in a mobile communication network. Of course, in addition to the networking mode, there may be other methods. For example, multiple RRUs can be used as CCUs, connected to corresponding ESC antennas via AISG cables, and connected to BBUs via optional fibers. The present invention provides an embodiment of a system for adjusting cell coverage by using an antenna. The structure of the system is as shown in FIG. 2, and the system embodiment is mainly implemented by software, including a BBU 210 connected in sequence. The RRU 220 of the CCU and the ESC antenna 230. among them:

The BBU 210 is configured to monitor the parameters of the reaction cell load status collected by the RRU 220 in real time, and when the monitored parameter exceeds a preset threshold, calculate the tilt angle of the corresponding antenna at the next moment, and form antenna adjustment information to be carried in the antenna command. Sent to the RRU 220 as a CCU;

The parameters of the reaction cell load status are monitored in real time, such as the number of service calls and the number of rejected calls, the call loss rate, and the cell edge user signal to interference ratio.

The antenna adjustment information includes antenna position information indicating the antenna to be adjusted and tilt information of the corresponding antenna adjustment.

The RRU 220 as a CCU is set to distribute the received antenna command to the corresponding ESC antenna

230;

Only one electrically adjustable antenna 230 is schematically depicted in FIG. In fact, the RRU 220 as the CCU sends the corresponding antenna command to the corresponding ESC antenna through the RRU to which the antenna belongs according to the antenna position information in the antenna command.

The ESC antenna 230 is configured to parse the antenna adjustment information from the received antenna command and perform adjustment of the antenna tilt angle.

The ESC antenna 230 is also arranged to return antenna adjustment response information to the BBU 210 via respective RRUs and/or RRUs 220 as CCUs after performing adjustments to the antenna tilt. The line parameters are initialized and calibrated, and the initial tilt angle information of each of the calibrated ESC antennas is stored locally.

After receiving the antenna adjustment response information, the BBU 210 further sends an antenna command carrying the antenna adjustment information to the RRU 220 as the CCU by estimating the current status of the cell.

The BBU 210 shown in FIG. 2 includes a cell parameter monitoring module 211, an antenna control management module 212, and a database 213 which are sequentially connected. among them:

The cell parameter monitoring module 211 is configured to monitor the load status of the reaction cell collected by the RRU in real time. The parameter is reported to the antenna control management module 212 when the parameter exceeds the threshold event occurs; the parameter of the reaction cell load status monitored by the cell parameter monitoring module 211 includes the number of service calls and the number of rejected calls, the call loss rate, and the cell edge user. Signal to interference ratio and other parameters.

For example, the cell parameter monitoring module 211 calculates the call loss rate at the moment according to the number of service calls and the number of rejected calls at each moment recorded as follows:

Call loss rate = (number of calls rejected due to busy base station) / (number of service calls + number of calls rejected due to busy base station).

If the cell parameter monitoring module 211 calculates that the call loss rate exceeds a preset threshold value, for example, the threshold value of the call loss rate preset by a certain cell is 5%, the call loss rate of the cell is calculated to be higher than 5 The event is reported to the antenna control management module 212. In addition, the cell parameter monitoring module 211 can simultaneously record the quality of service parameters of multiple cells, and store corresponding cell identifiers to distinguish the quality of service of different cells. For example, the BBU 210 manages two cells, and the cell identifiers are 0 and 1, respectively. The threshold values of the two cells are preset to be 1% and 5% respectively. If the call loss rate of the two cells is monitored at a certain time, the call loss rate is 2%. Then, only the event that the cell No. 0 does not satisfy the quality of service needs to be reported to the antenna control management module 212.

The antenna control management module 212 is configured to query the database configuration information of the corresponding cell from the database 213 after the parameter reported by the cell parameter monitoring module 211 exceeds the threshold value event, and calculate the next time of the corresponding electronically tuned antenna 230 according to a predetermined policy. The tilt angle of the electronically tuned antenna 230 and the downtilt information to be adjusted are encapsulated into antenna commands by a specific antenna interface protocol and sent to the RRU 220 as a CCU.

The antenna control management module 212 calculates the inclination of the next moment of the electronically tuned antenna 230 = the current tilt angle of the antenna + the step angle, wherein the step angle is the current tilt angle of the antenna and is selected according to a predetermined strategy.

There are many strategies for selecting the step angle. For example, a fixed angle can be selected. Since the stepping accuracy of the ESC antenna 230 is relatively high, the accuracy of the fixed step angle adjustment can also be performed well. Alternatively, one can be selected. The time-varying angle, for example, can select a larger step angle at the beginning of the tilt adjustment process for coarse adjustment, and gradually decrease the step angle as the number of adjustments increases, and fine-tune the antenna tilt angle. This method makes the antenna tilt angle The speed of convergence to the optimal tilt angle is faster. After the antenna command is sent, the antenna control management module 212 sets a timer to estimate the load of the cell after the antenna tilt adjustment, that is, when the timer expires, the load of the corresponding cell is estimated to be good, and the antenna is The control management module 212 can further calculate the tilt angle of the next moment of the electrical adjustment antenna 230=the current downtilt angle of the antenna-step angle, and continue to issue an antenna command; if the timer does not have a timing timeout, the antenna control management module 212 again When the parameter reported by the cell parameter monitoring module 211 exceeds the threshold event, the timer is turned off, the step angle to be increased by the antenna is adjusted according to the event, and the tilt angle of the next time of the ESC antenna 230 is calculated, and the antenna command is continuously issued.

The BBU 210 shown in FIG. 2 further includes an interaction interface 214 for providing an interface for interacting with other systems, and receiving RRUs (including not only the RRU 220 as a CCU but also a general RRU) to collect and feed back the reaction cell load status. Various parameters are forwarded to the cell parameter monitoring module 211. Here, the interaction interface 214 is connected to the RRU 220 as a CCU, thereby receiving various parameters of the reaction cell load status collected and fed back by the general RRU cascading as the RRU 220 of the CCU.

The RRU 220 as a CCU shown in FIG. 2 further includes an antenna instruction distribution module 221, configured to parse the antenna position information after receiving the antenna command, and distribute the antenna command to the corresponding electrical adjustment antenna 230 according to the antenna position information. .

The antenna command distribution module 221 determines, according to the antenna position information, that the antenna to be adjusted does not belong to the RRU, and then sends the antenna command to the corresponding RRU of the antenna, and distributes the antenna command through the corresponding RRU.

The electrical tune antenna shown in FIG. 2 further includes an antenna instruction execution module 231, configured to parse the antenna tilt information therein after receiving the antenna command, and invoke an antenna bottom driving module (not shown) to the antenna according to the tilt information. The tilt angle is adjusted.

The present invention is based on the above system embodiment, and correspondingly provides an embodiment of the method for adjusting cell coverage by using an antenna. The process is as shown in FIG. 3, and includes the following steps:

301, 302: After performing antenna parameter initialization and initial calibration, real-time monitoring various types of cell parameters of the reaction cell load status collected by the RRU; 303-305: When it is determined that the cell parameter does not meet the requirement and the inclination of the antenna is not greater than the upper limit, the inclination of the antenna is increased;

306-308: When it is determined that the cell parameter satisfies the requirement, and it is determined that the antenna has not been adjusted for a long time and the inclination of the antenna is not less than the lower limit, the inclination of the antenna is reduced.

In this embodiment, the cell parameter does not satisfy the requirement that the corresponding parameter exceeds a preset threshold, such as the call loss rate exceeds a preset call loss threshold, and vice versa.

FIG. 4 is a diagram showing an interaction process of the BBU, the RRU, and the electronically tuned antenna in the system embodiment of the present invention, and the implementation of the foregoing method is as follows:

Step 401: The BBU performs antenna parameter initialization and initial calibration on each electrical tune antenna by using an RRU as a CCU.

Step 402: The BBU queries the tilt angle of each electrical tune antenna by using the RRU as the CCU, and obtains a corresponding antenna tilt angle query response;

Step 403: The BBU saves the initial value of the tilt angle of each of the tuned antennas to the local area. Step 404: After the BBU learns that the cell parameter exceeds the limit, the BBU queries the corresponding cell antenna configuration information, and determines the antenna tilt angle according to a predetermined policy.

The BBU knows the cell parameter violation limit, for example, according to the number of service calls and the number of rejected calls at each moment recorded, the call loss rate at which the time is known = (the number of calls rejected due to the busyness of the base station) I (the number of service calls + the base station) The number of busy and rejected calls).

Step 405: The BBU encapsulates the determined antenna tilt angle and the position information of the corresponding antenna into an antenna tone. Specifically, when the RRU that is the CCU knows that the antenna adjustment command is not adjusting the corresponding electronically adjustable antenna, the antenna adjusts the command by cascading. It is sent to the RRU corresponding to the ESC antenna to be adjusted, and sent by the corresponding RRU to its connected ESC antenna.

Step 406: The electrical adjustment antenna analyzes the antenna tilt information in the antenna adjustment command to adjust the antenna tilt angle, that is, increases the antenna tilt angle by one step angle; interest;

Specifically, in contrast to the process of step 405, the electrical tune antenna sends an antenna adjustment response to its corresponding RRU, and the RRU sends the antenna adjustment response to its cascaded RRU as a CCU, thereby returning the antenna adjustment to the BBU. Respond to the information.

Step 408: The BBU sets and starts a timer operation for estimating the current status of the cell.

The choice of timer duration is based on different requirements. For example, if cell coverage is required to be stable, you can choose a longer duration, or vice versa.

Step 409: When the timer expires, the BBU determines the antenna tilt angle according to the queried antenna configuration information of the corresponding cell and a predetermined policy.

For example, if the timer duration is 5s, if the corresponding cell parameters are still not reported within 5s, the current cell status can be estimated to be better.

Step 410: The BBU encapsulates the determined antenna tilt angle and position information of the corresponding antenna into an antenna adjustment step 411: the electrical adjustment antenna analyzes the antenna tilt information in the antenna adjustment command to adjust the antenna tilt angle, that is, reduces the antenna tilt angle by one step angle;

This step mainly considers the effective use of base station resources. Since the cell load is relatively stable once the cell is configured, the antenna tilt angle does not need to be adjusted frequently. If the antenna tilt is re-adjusted due to a sudden increase in network capacity during certain periods of time, the original configuration needs to be considered after that period. Since the cell load may be reduced after the period has elapsed, the base station resources may be idle, so that a larger antenna tilt angle is unnecessary, and it is necessary to reduce the antenna tilt angle. In addition, when the antenna tilt angle is reduced, the neighboring area interference will gradually increase, which will further reduce the antenna tilt angle, thereby ensuring that the cell is reasonably covered according to the neighboring area, so such adaptive adjustment is reasonable and necessary. interest. " ' ' °

Of course, in step 409, if the BBU knows that the corresponding cell parameter still exceeds the limit before the timer expires, the timer is turned off, and step 404 is repeated, except that the determined antenna tilt angle at the next moment and the last determined antenna tilt angle are determined. It will be different, for example, the increased step angle may be slightly smaller. The method for adjusting cell coverage by using the antenna provided by the present invention can be applied to another special case: When a base station in the network fails, the mobile communication terminal user within the coverage of the cell will not be served. In the past, in this case, it is necessary to manually check the base station failure, and then re-enable the base station after the repair. This period of time can be very long, and can even lead to strong user dissatisfaction. With the system and method of the present invention, this urgent need can be quickly solved.

When the base station fails, there is no signal in the coverage of the cell under its jurisdiction, and there is no interference to the neighboring area. In this way, in the process of adjusting the antenna dip angle of the adjacent cell, the adjustment may be stopped because the neighboring area interference increases, but the current coverage will continue to be increased until the number of service users in the cell is sufficiently large, or Neighbor interference increases again. However, in either case, the coverage of the faulty cell can be covered by the antenna tilt adjustment of the neighboring area, thereby temporarily solving the problem of the base station failure, and the time for the base station to repair the repair, and the mobile communication terminal user in the faulty cell is also Get the service as much as possible.

One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module in the above embodiment may be implemented in software or in hardware. The invention is not limited to any specific form of hardware or software combination.

Industrial applicability

The system, device and method for adjusting cell coverage by using an antenna provided by the invention enable the base station to adaptively adjust the antenna tilt angle by monitoring the cell parameters, thereby eliminating the trouble of the artificial climbing tower and the human road test operation, and the adjustment The method is more sensitive to changes in the network load condition, and the adjustment of the antenna downtilt angle is more accurate. By operating the cell coverage adaptive adjustment strategy, each base station can ensure that the downtilt angle of most base station antennas is optimal, and the network service quality can be ensured, and the effective utilization of network resources can be achieved.

Claims

Claim

A system for adjusting cell coverage by using an antenna, comprising: an electrical tune antenna, a baseband unit in the base station device, and a radio remote unit, wherein at least one of the radio remote units is a radio remote unit as a central control unit, among them:

2. The system according to claim 1, wherein the baseband unit comprises a cell parameter monitoring module, an antenna control management module, and a database, which are sequentially connected, and the radio remote unit as the central control unit includes an antenna instruction distribution module; among them:

3. The system of claim 2, wherein The antenna control management module is further configured to: after receiving the event, determine a step angle of the antenna tilt adjustment according to a predetermined strategy, and calculate, according to a tilt angle of the current antenna of the corresponding antenna, that the tilt angle of the corresponding antenna is equal to the corresponding antenna. The angle of inclination of the current moment plus the step angle.

4. The system according to claim 2, wherein the electrical adjustment antenna comprises an antenna instruction execution module, configured to invoke a driving module to the antenna according to the antenna tilt information parsed from the received antenna command. The tilt angle is adjusted.

5. The system of claim 4, wherein the baseband unit further comprises an interaction interface configured to forward various parameters of the reactive cell load condition collected and fed back by the radio remote unit to the Cell parameter monitoring module.

A base station apparatus for adjusting a cell coverage by using an antenna, comprising: a baseband unit and a radio remote unit, wherein at least one of the radio remote units is a radio remote unit as a central control unit, wherein:

The baseband unit is configured to: monitor a parameter of a load cell status of the reaction cell collected by the radio remote unit in real time, and if the monitored parameter exceeds a preset threshold, calculate a tilt angle of the next antenna of the corresponding cell, and form an An antenna command is sent to the radio remote unit as the central control unit;

The base station apparatus according to claim 6, wherein the baseband unit includes a cell parameter monitoring module, an antenna control management module, and a database, which are sequentially connected, and the radio remote unit including the central control unit includes an antenna instruction distribution module. ; among them:

The cell parameter monitoring module is configured to monitor parameters of the reaction status of the reaction cell in real time after performing antenna parameter initialization and calibration on each electrical tune antenna, including the number of service calls and the number of rejected calls, call loss rate, and cell edge users. One or more of the signal-to-interference ratios; if the parameter exceeds the threshold value event, the event is reported to the antenna control management module;

The antenna control management module is configured to: after receiving the event reported by the cell parameter monitoring module, obtain an antenna configuration information of a corresponding cell from the database query, and calculate corresponding according to the antenna configuration information and a predetermined policy. The inclination of the antenna at the next moment, and press the antenna tilt information The antenna interface protocol is encapsulated into the antenna command and additional antenna position information is sent to the antenna instruction distribution module;

The base station apparatus according to claim 7, wherein the baseband unit further comprises an interaction interface, which is configured to forward various parameters of the reaction cell load status collected and fed back by the radio remote unit to the The cell parameter monitoring module is described.

9. An electrical adjustment antenna device for adjusting a cell coverage by using an antenna, comprising: an antenna instruction execution module and a call driver module, wherein

The drive module is configured to adjust the tilt of the antenna.

10. The electrically adjustable antenna device according to claim 9, wherein

11. A method for adjusting cell coverage using an antenna, comprising:

12. The method of claim 11 wherein The baseband unit in the base station monitors real-time parameters of the reaction cell load status collected by the radio remote unit in the base station, and if the parameter exceeds a preset threshold, calculates an inclination angle of the next antenna of the corresponding antenna, and forms an The step of transmitting the antenna command to the radio remote unit as the central control unit in the base station includes:

After receiving the antenna command, the ESC antenna adjusts the tilt angle of the antenna according to the antenna tilt information analyzed from the antenna command.

The method of claim 12, wherein the calculating the tilt angle of the next moment of the corresponding antenna according to the antenna configuration information and the predetermined policy comprises:

14. The method of claim 13 further comprising:

After the electrical adjustment antenna completes the adjustment of the tilt angle of the antenna, returning the antenna adjustment response information to the baseband unit by using the radio remote unit as the central control unit; After receiving the antenna adjustment response information, the baseband unit sets and starts a timer; if the timer expires, it estimates that the current condition of the cell is good, and determines a second step angle of the antenna tilt adjustment according to a predetermined policy. Calculating, according to the second step angle, that the inclination angle of the next moment of acquiring the corresponding antenna is equal to the inclination angle of the current moment of the corresponding antenna minus the second step angle;

15. The method of any of claims 11 to 14, further comprising: