CN1633049A - A method for monitoring power control performance of WCDMA system - Google Patents

Abstract

The present invention provides a method for monitoring the power control performance of a wideband code division multiple access system. By setting the power control performance monitoring background on the Node B side, the parameter curve information related to power control that can only be observed at the RNC side, such as SIR/SIR _target curve, or BLER statistical result curve, or downlink transmission code domain power curve, or RSSI curve, can be observed on the Node B side, and is not limited by RNC. At the same time, the time accuracy of the observed parameters can be accurate For any time slot, the minimum unit of the parameter curve can be increased from the original second to 10ms. In addition, users can also observe the monitoring results of uplink TPC and downlink TPC reported by Node B, which is more conducive to tracking and locating WCDMA system problems.

Description

A Method for Monitoring Power Control Performance of Wideband Code Division Multiple Access System

technical field

The invention relates to the technical field of wireless monitoring, in particular to a method for monitoring the power control performance of a wideband code division multiple access system.

Background technique

Wideband Code Division Multiple Access (WCDMA) system power control includes closed-loop power control and outer-loop power control. WCDMA closed-loop power control is to compare the received signal-to-interference ratio (SIR) measurement value with the signal-to-interference ratio threshold (SIR _target ) to determine the transmit power control (TPC) information, and then send the TPC information to the transmitter to adjust The size of the transmit power. The WCDMA outer-loop power control technology determines the SIR _target required for closed-loop power control by calculating the received block error rate (BLER).

In order to effectively monitor the power control performance of the WCDMA system, the key information of the user to be monitored must be specified for the WCDMA system, such as SIR, SIR _target , uplink TPC used to control the uplink transmission power of the user terminal (UE), and used to control the base station (Node B) Dynamic real-time observation of downlink TPC, BLER, uplink receive in-band total power (RTWP) and downlink dedicated channel code domain transmit power (TCP), etc.

In the WCDMA system, the existing method for monitoring the power control performance of a designated user is to monitor the power control performance of the system using the maintenance background provided by the radio network controller (RNC) side of WCDMA. The specific implementation method is: start the specified user connection performance tracking in the RNC maintenance background, the RNC sends a start measurement command to the Node B through the Iub (Interface of RNC and Node B) interface, and requires the Node B to pass the SIR measurement value, the downlink TCP, and the uplink RTWP The Iub interface periodically reports, wherein, according to the agreement, the minimum reporting period of the SIR measurement value is 80ms, and the RNC locally records the SIR _target and BLER information through a radio resource management (RRM) module. The maintenance background on the RNC side converts the information reported by Node B and the information locally recorded by the RNC into a graph with Global Positioning System (GPS, Global Positioning System) time as the abscissa, and displays it in different windows, so as to realize the observation of the WCDMA system Specifies the purpose of the user's power control performance.

The existence of above-mentioned method has following shortcoming:

1) Since the field test usually needs to specify the SIR measurement value of each 10ms wireless frame or each time slot of the channel to be tested (a 10ms wireless frame is divided into 15 time slots according to the time interval), and the Node B reports the SIR measurement through the Iub interface The period of the value is 80ms, and the minimum unit of the abscissa of the observed parameter curve is second, so the accuracy of this scheme is not enough in many occasions such as field tests;

2) The Node B must be notified by the RNC to start the SIR measurement reporting function, otherwise the Node B will not report the SIR measurement value at all, thus limiting the use of this solution;

3) Since in the prior art, all information is collected by the RRM module inside the RNC, therefore, the information of uplink TPC and downlink TPC cannot be extracted for observation;

4) The collected information is displayed in different window interfaces, which is inconvenient to use.

Contents of the invention

In view of this, the object of the present invention is to provide a method for monitoring the power control performance of a wideband code division multiple access system, so that the monitored information is more comprehensive and accurate.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for monitoring power control performance of a wideband code division multiple access system, the method comprising the following steps:

a. Set up the power control performance monitoring background in the operation and maintenance background of the wideband code multiple access base station Node B;

b. After Node B receives the start power control performance monitoring command, it collects the monitoring information specified in the monitoring command, and periodically reports the collected information to the power control performance monitoring background;

c. The power control performance monitoring background displays the received information reported by Node B in the window interface.

Preferably, the step b further includes: after the Node B receives the start power control performance monitoring command from the power control performance monitoring background, it first judges whether the command is legal, and if not, directly reports to the power control performance monitoring background An error message is displayed, otherwise perform the next steps.

Preferably, the step c further includes: the power control performance monitoring background saves the received reported information from the NodeB, and then executes the subsequent steps.

Preferably, the power control performance monitoring background in step a is directly connected to the NodeB through a near-end network port or a remote IPOA.

Preferably, the power control performance monitoring command described in step b is directly sent by the power control performance monitoring background, or sent by the radio network controller RNC through the Iub interface.

Preferably, the parameters of the power control performance monitoring command in step b include: the index number of the specified user, the abscissa of the displayed graph, and the reporting enable flag of the signal-to-interference ratio SIR measurement value and the signal-to-interference ratio threshold SIR _target value message, the uplink The report enable flag of the transmit power control TPC and downlink transmit power control TPC message, the report enable flag of the downlink transmit code domain power TPC message, the report enable flag of the received signal in-band total power RTWP message and/or the block error rate BLER The reporting enable flag of the statistical result message.

Preferably, the monitoring information specified by the system in step b includes: SIR measurement value, SIR _target value, uplink transmit power control TPC, downlink transmit power control TPC, block error rate BLER statistics, downlink Transmitting code domain power TCP and receiving signal in-band total power RTWP.

Preferably, for the signal-to-interference ratio SIR measurement value and the signal-to-interference ratio threshold SIR _target value, the minimum value of the monitoring information period is a time slot; for the uplink transmit power control TPC, downlink transmit power control TPC, block error rate BLER statistical results , downlink transmit code domain power TCP and received signal in-band total power RTWP, the minimum value of the monitoring information period is 10ms wireless frame.

Preferably, the collection method described in step b is: the base station sends a collection command to each relevant module in the baseband subsystem according to the enable flag in the power control performance monitoring command, and each relevant module in the baseband subsystem performs Collect and report the collected information to the power control performance monitoring background periodically after grouping the collected information into frames in a standard form.

Preferably, the collection information of each relevant module in the baseband subsystem is: the downlink power weighting module collects downlink TCP information, the uplink digital down-conversion module collects uplink RTWP information, the uplink demodulation module collects uplink TPC, and the downlink For the information of TPC, uplink SIR and uplink SIR _target , the uplink decoding module collects uplink BLER information.

Preferably, the method further includes: the base station sends a command to stop collection to each corresponding module in the baseband subsystem according to the enable flag in the power control performance monitoring command, and notifies each corresponding module in the baseband subsystem to stop collecting and reporting .

Preferably, the window interface in step c includes 6 sub-windows with preset fixed positions for displaying measurement curves.

Applying the present invention, by setting the power control performance monitoring background on the Node B side, the parameter curve information related to power control that can only be observed on the RNC side, such as SIR/SIR _target curve, or BLER statistical result curve, or downlink transmission The code domain power curve, or RSSI curve, can be observed on the Node B side, and is not limited by the RNC. At the same time, the time accuracy of the observed parameters can be accurate to any time slot, and the minimum unit of the parameter curve can be improved from the original second to 10ms. In addition, users can also observe the monitoring results of uplink TPC and downlink TPC reported by Node B, which is more conducive to tracking and locating WCDMA system problems.

Description of drawings

Fig. 1 shows the schematic diagram of connection between the power control performance monitoring background and Node B provided by the present invention;

FIG. 2 is a schematic diagram of observing the power control performance window of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

The idea of the present invention is: set the power control performance monitoring background in the operation and maintenance background of Node B; after receiving the start power control performance monitoring command, Node B collects the monitoring information specified in the monitoring command, and sends the power control performance monitoring background cycle Report the collected information; the power control performance monitoring background will display the received information reported by Node B in the window interface. The specific implementation process is as follows:

A power control performance monitoring background is set in the WCDMA base station operation and maintenance background. The power control performance monitoring background is an executable program module in the WCDMA base station background, and runs on the WCDMA base station operation and maintenance background computer. The WCDMA base station operation and maintenance background computer passes The near-end network port or remote IPOA (Internet Protocol over ATM) is connected to the WCDMA base station, as shown in Figure 1.

When it is necessary to monitor the power control performance of a specified user, first obtain the index number UserId of the user whose power control performance is to be observed, and then the power control performance monitoring background in the base station operation and maintenance background directly sends a notification to start power control performance monitoring to Node B command, or the RNC sends a command to NodeB to start power control performance monitoring through the Iub interface, and the parameters and their value meanings in the command are shown in Table 1: command parameter name Value meaning The index number UserId of the specified user user index number SIR/SIR _target message reporting enable flag enable or disable Uplink TPC/downlink TPC message reporting enable flag enable or disable Downlink TCP message reporting enable flag enable or disable RTWP report enable flag enable or disable BLER statistical result message reporting enable flag enable or disable Drawing abscissa requirements GPS time or BFN

Table 1

The minimum unit of the Node B frame number (BFN) in Table 1 can be 10ms, but for the convenience of observation, 100ms is usually taken.

After Node B receives the command "Start power control performance monitoring", it judges whether the parameters in the command are legal. The parameters notify the corresponding modules in the baseband subsystem to collect information, and stamp the collected information with GPS or BFN time stamps. The module that executes the collection of information frames the collected information according to the standard The set period is reported to the power control performance monitoring background. For the SIR/SIR _target , the minimum preset period may be one time slot, and for other collected information, the preset minimum period is a 10ms wireless frame.

The corresponding relationship between the relevant modules in the baseband subsystem and the collected information is shown in Table 2: Modules in the Baseband Subsystem collect information Downlink Power Weighting Module downlink TCP Uplink digital down conversion module Uplink RTWP Uplink demodulation module Uplink TPC Downlink TPC Uplink SIR Uplink SIR _target Uplink decoding module Uplink BLER

Table 2

For example, if the report enable flag in the report enable flag parameter of the SIR/SIR _target message, uplink TPC/downlink TPC message and BLER message in the power control performance monitoring command is "enable", and the abscissa drawing requirement is BFN , then the corresponding modules of the collected information in the baseband subsystem, that is, the uplink demodulation module and the uplink decoding module, after framing the collected information with the BFN time stamp according to the standard mode, according to the preset cycle, For example, report to the power control performance monitoring background every 100ms wireless frame.

The power control performance monitoring background will first save the reported message received from Node B locally, and then convert the message parameter content into the format required for graphic display and display it in the Cartesian coordinate system. For example, the power control performance monitoring background draws the received collection information in the Cartesian coordinate system with BFN as the abscissa unit of 100ms and the measured value as the ordinate, and all the graphs of the measured values are displayed in the preset by In the same window interface composed of more than one sub-window.

FIG. 2 is a schematic diagram of observing the power control performance window of the present invention. The window for observing power control performance is composed of 6 sub-windows, each sub-window is used to display different monitoring curves, and the position of each sub-window is relatively fixed according to the preset settings, as shown in Figure 2, sub-window 1 is used to display BLER Curve, sub-window 2 is used to display the upward TPC curve, sub-window 3 is used to display the downward TPC curve, sub-window 4 is used to display the RTWP curve, sub-window 5 is used to display the downward TCP curve, and sub-window 6 is used to display SIR and SIR _{For the target} curve, the abscissas of all the above sub-windows can be all GPS or all BFN according to the requirements of the monitoring command.

Referring to the previous example, if the monitor command only requires to monitor the information of SIR, SIR _target , uplink TPC, downlink TPC and BLER, in the window for observing power control performance, only subwindows 1, 2, 3 and 6 have The curves are displayed, while nothing is displayed in subwindows 4, 5.

According to the displayed power control performance monitoring curve, the system can analyze the power control performance of the specified user and monitor the communication quality of the channel used by the user. If the Node B uses each time slot as the reporting period, the system can monitor the SIR measurement value of each time slot saved in the background according to the power control performance, and can also perform post-processing operations, such as accurately calculating the mean value and variance of the SIR measurement, etc. In this way, the purpose of further analyzing the power control performance of the user monitored by the system is achieved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (12)

1, a kind of method for monitoring wideband code division multiple access system power control performance, it is characterized in that, the method comprises the following steps: a. Set up the power control performance monitoring background in the operation and maintenance background of the wideband code multiple access base station Node B; b. After Node B receives the start power control performance monitoring command, it collects the monitoring information specified in the monitoring command, and periodically reports the collected information to the power control performance monitoring background; c. The power control performance monitoring background displays the received information reported by Node B in the window interface. 2. The method according to claim 1, wherein said step b further comprises: after the Node B receives the start power control performance monitoring command from the power control performance monitoring background, it first judges whether the command is legal, if not If it is legal, then directly report an error message to the power control performance monitoring background, otherwise perform the next steps. 3. The method according to claim 1, characterized in that the step c further comprises: the power control performance monitoring background saves the received reported information from the Node B, and then executes the subsequent steps. 4. The method according to claim 1, 2 or 3, characterized in that the power control performance monitoring background in step a is directly connected to the Node B through a near-end network port or a remote IPOA. 5. The method according to claim 1, 2 or 3, characterized in that the power control performance monitoring command in step b is directly sent by the power control performance monitoring background, or sent by the radio network controller RNC through the Iub interface. 6. The method according to claim 1, 2 or 3, characterized in that the parameters of the power control performance monitoring command in step b include: the index number of the specified user, the abscissa of the displayed graph, and the measured value of the signal-to-interference ratio (SIR) The report enable flag of the signal-to-interference ratio threshold SIR _target value message, the report enable flag of the uplink transmit power control TPC message and the downlink transmit power control TPC message, the report enable flag of the downlink transmit code domain power TPC message, The report enable flag of the power RTWP message and/or the report enable flag of the block error rate BLER statistics result message. 7. The method according to claim 1, 2 or 3, characterized in that the monitoring information specified by the system in step b includes: SIR measurement value, SIR _target value, uplink transmit power control TPC , Downlink transmit power control TPC, block error rate BLER statistical results, downlink transmit code domain power TCP and received signal in-band total power RTWP. 8. The method according to claim 7, characterized in that, for the SIR measurement value and the SIR _target value, the minimum value of the monitoring information cycle is a time slot; for the uplink transmit power control TPC, downlink Transmit power control TPC, block error rate BLER statistical results, downlink transmit code domain power TCP and received signal in-band total power RTWP, the minimum value of the monitoring information period is 10ms wireless frame. 9. The method according to claim 1, 2 or 3, characterized in that, the method of collecting in step b is: the base station sends each related signal in the baseband subsystem according to the enable flag in the power control performance monitoring command. The module sends a collection command, which is collected by each relevant module in the baseband subsystem, and the collected information is framed in a standard form and then periodically reported to the power control performance monitoring background. 10. The method according to claim 9, wherein the collection information of each relevant module in the baseband subsystem is: the downlink power weighting module collects downlink TCP information, and the uplink digital down-conversion module collects uplink RTWP information , the uplink demodulation module collects uplink TPC, downlink TPC, uplink SIR and uplink SIR _target information, and the uplink decoding module collects uplink BLER information. 11. The method according to claim 9, characterized in that the method further comprises: the base station sends a command to stop collection to each corresponding module in the baseband subsystem according to the enable flag in the power control performance monitoring command, and notifies Each corresponding module in the baseband subsystem stops collecting and reporting. 12. The method according to claim 1, wherein the window interface in step c includes 6 sub-windows with preset fixed positions for displaying measurement curves.

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