KR20040049990A - Method for diagnosing mobile network - Google Patents

Abstract

PURPOSE: A method for diagnosing a wireless network is provided to check wireless network performance indexes, and to diagnose a wireless network for optimizing reverse and forward links according to checked results, so that a manager can immediately diagnose a wireless environmental problem. CONSTITUTION: A system starts analyzing cells(400), and checks interworking optical repeater information of an RCS(Repeater Control System) including a reverse attenuation level(410). If an optical repeater is connected with a base station, the system outputs an optical combiner attenuation level confirm message if a reverse attenuation level value is set to a predetermined value(420). If an attenuation level value of the optical repeater is not set to the predetermined value, the system outputs an optical repeater level control message(430).

Description

How to diagnose wireless network {METHOD FOR DIAGNOSING MOBILE NETWORK}

The present invention relates to a wireless network diagnosis method, and more particularly, to a method for diagnosing a wireless network using a network server connected to the wireless network and providing a method for optimizing the wireless network to a network manager.

In order to improve the call quality of the mobile communication wireless network, the mobile service provider must constantly optimize the state of the wireless network according to the changing wireless environment.

Conventionally, a mobile diagnostic monitor has been used to diagnose a wireless environment of a wireless network. That is, the mobile communication terminal is connected to the PC and the GPS, and the messages transmitted and received between the mobile communication terminal and the base station and the radio wave measurement related data of the mobile communication terminal are displayed on the PC screen, and these data are stored and analyzed in association with the GPS location data. Way.

Using the stored data, it is possible to analyze data related to radio waves and messages by linking them with location and time. The network manager used this data to optimize the wireless network to solve problems such as call failure and truncation.

However, according to this method, since the data is taken directly from the field for data analysis, it is difficult to immediately respond to changes in the wireless environment, and different responses can be made depending on who the network manager processes. It is difficult to guarantee an optimal response.

In addition, the above method can only handle data in one direction from the forward and reverse links of the wireless network environment to the wireless network environment of the forward link from the base station to the terminal.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a wireless network diagnosis method capable of immediately responding to changes in the wireless environment in the field and ensuring an optimal response regardless of the network administrator. do.

1 is a schematic block diagram of one embodiment of a system for performing a wireless network diagnostic method according to the present invention;

2 is a flowchart of an embodiment of a wireless network diagnostic method according to the present invention;

3 is a flowchart for performing a base station radio network performance indicator survey of FIG.

4 is a flowchart for performing a wireless network diagnosis for reverse link optimization of FIG.

5 is a flow chart for performing wireless network diagnostics for forward link optimization of FIG.

In order to achieve the above object, the method for managing a wireless network according to the present invention comprises the steps of investigating wireless network performance indicators of a base station using wireless network information collected from the wireless network, and for reverse link optimization and forward link optimization using the survey results. It characterized in that it comprises a step of diagnosing the wireless network.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an embodiment of a system for performing a wireless network diagnostic method according to the present invention. Statistics server 110, engineering server, optimization server 130, diagnostic server 140 and network management computer 150 is connected to the mobile communication network (100).

Statistics server 110 is statistical information, such as statistics and cumulative information of the wireless network performance / efficiency indicators and wireless network indicators in the mobile communication network 100, engineering server 120 is Q-factor, Cell Loading, Max. Engineering information such as Erlang Capacity, and the optimization server 130 generates optimization information such as base station TX / RX power, AVG_FPG, NoW level, respectively, and transmits to the diagnostic server 140.

The Q-factor puts the most cally sectors in the numerator of the three sectors of alpha, beta, and gamma in the denominator and the remaining two sectors in the denominator to determine if the base station's call distribution design is good or if a particular sector is overloaded. As an element, in an ideal case 1 / (1 + 1), it is 0.5.

Cell-Loading is a factor calculated by measuring the base station RF reception level of how much the current call volume is based on the no-signal time at 1FA (Frequency Assignment).

Erlang Capacity is a call load called Erlang and is defined as (call / time) * (use time / call). If 60 calls occurred in 1 hour and the average of 1 minute per call was used, it would be 1 Erlang. If the average number of subscribers in this base station is 500, it is expressed as 2 mErlang per subscriber, that is, 1/500 Erlang.

TX / RX power is the transmit / receive output level of the base station, and AVG_FPG is the average forward power gain of the base station. NoW is the base station reception level noise density, OH_PWR is the forward overhead power value of the base station, and PWR / Erl is the power level per Erlang of the base station.

The diagnostic server 140 generates wireless network diagnostic information using the transmitted statistical information, optimization information, and engineering information, and transmits the diagnostic information to the network management computer 150. The network manager manages the network based on the transmitted wireless network diagnostic information. The computer 150 optimizes the wireless network.

2 is a flowchart of an embodiment of a method for diagnosing a wireless network according to the present invention. The diagnostic server 140 first examines the base station performance indicators (200), and performs the reverse link optimization 210 and the forward link optimization 220 steps.

3 is a flowchart for performing a base station radio network performance indicator survey of FIG. First, the base station performance item is examined (300). Base station performance items are outgoing and incoming statistics. Outgoing statistics include outgoing statistics such as outgoing traffic rate, completion rate, and CD rate, and incoming statistics such as incoming communication rate, completion rate, and CD rate. Next, the cause is analyzed for each item (310). The main cause of KPI analysis is the analysis of base station performance. Finally, the system level such as Alarm / Fault / Status, base station, repeater, PLD Parameter, F3000 message is examined (320).

FIG. 4 is a flowchart for performing a wireless network diagnosis for reverse link optimization of FIG. 2. First, cell analysis is started (400). Cell analysis performs problem diagnosis on magnetic cells.

Cell analysis analyzes N time RX power time-varying graph that analyzes whether P, D path difference has increased rapidly by more than RdB among the accumulated N time RX reception levels, and P, D path NoW values in recent M days continue to receive more than the standard value. NoW analysis, which analyzes whether or not a day or more than the baseline value of the day, and L-day RX power cumulative graph analysis that analyzes whether the P, D path RX power reception level of the day is higher or lower than the L-day average value.

After cell analysis, the repeater control system (RCS) interworking optical repeater (MC) information including the reverse level (REV. ATT.) Value is examined (410).

The results of this investigation are used to perform the backward optimization algorithm. First, when the optical repeater is connected to the base station, when the reverse attenuation level value of the optical repeater is set to a predetermined value, an optical combiner attenuation level level confirmation message is output (420), and the attenuation level value of the optical repeater is not set to the predetermined value. If not, the optical repeater level adjustment message is output (430).

If the optical repeater is not connected, even if the base station antenna termination (Ant.Term), if the NoW is higher than the predetermined value, and outputs the LMR 400 cable failure message connecting the indoor and outdoor base station FEU terminal and Arrester terminal (440), NoW If is not higher than the predetermined value, the noise-detection message is output (450).

5 is a flowchart for performing a wireless network diagnosis for optimizing the forward link of FIG. After the step for reverse link optimization, the step for forward link optimization begins (500). The forward cell analysis step includes diagnosing magnetic cell problems and tassel problem. In the self-cell analysis, it is analyzed whether the AVG_FPG value is higher than the reference value, whether the TX_PWR, OH_PWR, PWR / Erl value is higher than the reference value, and whether the OH_PWR has increased or decreased in the last n days. In other cell analysis, the AVG_FPG, TX_PWR, OH_PWR, and PWR / Erl values of neighboring base stations are higher than the reference value, and the HOs with neighboring base stations are analyzed.

Next, the RCS interworking MC information including the forward output power (TX_PWR) and the forward ATT (FWD ATT) value is examined (510), and the base station cell database such as the latitude, longitude, and repeater location of the base station is checked ( 520).

Create a forward chain diagram (530) and perform a forward optimization algorithm. Algorithm performance begins with checking whether the coverage of its base station is appropriate.

If the coverage is a predetermined value, the base station interferer (Interferer) is found (540), and the OH_PWR of the interferer is lowered and a message for securing an alternative force to prevent the coverage hole is output (550).

If the coverage is greater than the predetermined value, the base station OH_PWR is lowered and a message for securing an alternative force to prevent the coverage hole is output (560). If the coverage is smaller than the predetermined value, a message for raising the OH_PWR of the base station is output (570).

The network manager uses the network management computer 150 to perform a wireless network optimization scheme according to the message output from the diagnostic server. This may be performed repeatedly until the wireless network is optimized.

According to the present invention, the manager of the wireless network can immediately respond to changes in the wireless environment in the field, and can perform optimal network management using the accumulated wireless network related statistics and various parameters.

Although the present invention has been described with respect to some preferred embodiments, the scope of the present invention should not be limited by the above embodiments but will extend to other modifications within the claims of the present invention.

Claims (7)

Examining wireless network performance indicators of the base station using wireless network information collected from the wireless network; Diagnosing a wireless network for reverse link optimization using the survey result; And And a step of diagnosing a wireless network for optimizing a forward link using the survey result. According to claim 1, wherein the base station wireless network performance indicators survey step, Examining base station performance items; A cause analysis step of the investigated items; And And a system level investigation step using the analysis result. The method of claim 1 or 2, wherein the wireless network diagnostic step for reverse link optimization comprises: Cell analysis step; Repeater control system (RCS) interworking optical repeater (MC) information research step; When the optical repeater is connected using the results of the cell analysis and the RCS interworking MC information, when the reverse attenuation level value of the optical repeater is properly set to a predetermined value, an optical coupler attenuation level confirmation message is output and set to a predetermined value. If not, outputting an optical repeater level adjustment message; And By using the cell analysis and the RCS-linked MC information survey result, when the optical repeater is not connected, the base station FEU stage and the Arrester stage are connected when the base station reception level noise density (NoW) is higher than a predetermined value even when the base station antenna termination is performed. Outputting a bad message of a cable, and outputting a noise detection message when the NoW is not higher than a predetermined value. 4. The method of claim 3, wherein the cell analysis step is performed only for magnetic cells. The method of claim 1 or 2, wherein the wireless network diagnostic step for optimizing the forward link includes: Cell analysis step; RCS interworking MC information research step; Confirming a base station cell database; Creating a forward chain diagram; And Based on the cell analysis result, the RCS interworking MC information search result and the base station cell database check result, when the base station coverage is smaller than a predetermined value, a message for increasing the forward overhead power (OH_PWR) of the base station is output, In the case of a large value, the base station OH_PWR is lowered to output a message for securing the replacement power to prevent coverage holes, and if a predetermined value, the base station interferer is found to lower the OH_PWR of the interferer and to output a message to secure the alternative power to prevent the coverage hole. Wireless network diagnostic method comprising a. The method of claim 5, wherein the cell analysis step, Diagnosing forward link magnetic cell problems; And A wireless network diagnostic method comprising the step of diagnosing a forward link tassel problem. The method of claim 1, wherein the wireless network information includes statistical information including statistics and cumulative information of wireless network performance or efficiency indicators and wireless network indicators, base station transmit / receive output level (TX / RX power), and forward average power of the base station. Optimization information including gain (AVG_FPG), NoW level, and Q-factor, Cell Loading, Max. Wireless network diagnostic method comprising the engineering information including Erlang Capacity.