KR20000008445A - Manless remote wireless telecommunication electric wave measuring device - Google Patents

Abstract

PURPOSE: A measuring device for manless remote wireless telecommunication electric wave environment is provided to value the electric wave environment of a base station for wireless telecommunication and make the electric wave environment best suitable. CONSTITUTION: The measuring device for manless remote wireless telecommunication electric wave environment is composed of: a central processing unit(CPU)(11); a ROM(read only memory)(112) that is connected to the central processing unit; a RAM(random access memory)(113); a flash memory(114); and a GPS(global positioning system) unit(100). The device is connected with a CDMA cellular or a PCS terminal(120).

Description

Unmanned remote radio communication environment measurement device

The present invention relates to a wireless communication system, and more particularly, to a wireless communication propagation environment measurement apparatus for evaluating and optimizing a radio environment of a wireless communication base station.

Wireless telecommunication technology is growing rapidly in the telecommunications industry. In other words, cellular communication, including cellular phones, which is used to deliver information media to anyone, anywhere, anytime, the ultimate goal of communication, is bringing about innovative changes in terms of quality and quantity.

Cellular and personal mobile communication (PCS) communication systems operate by dividing the service area into cell units and operating a radio base station in each cell so that as many cellular subscribers as possible can communicate efficiently using a given radio frequency resource.

Each radio base station should be able to operate a communication system so that as many subscribers as possible in the service area require radio resource allocation, as many radio subscribers as possible can communicate in high quality using a given radio resource.

In the case of a radio frequency division multiple access (FDMA) scheme, a radio resource is assigned a specific carrier frequency to a subscriber in a cell. In the time division multiplex access (TDMA) scheme, a time slot is assigned to a given carrier frequency. In addition, in the Code Division Multiple Access (CDMA) scheme currently in service in Korea, a code is given to a subscriber.

Digital communication systems require careful access to network planning, design and operation. That is, in designing a mobile communication system, it is necessary to set network design criteria for satisfying a quality target of a service to be provided.

In recent years, network design has become easier with the help of computer systems using digital mapping.However, by collecting and analyzing the radio wave environment at the base station, it is possible to accurately grasp the call quality status in the service area. A radio environment measurement management system is needed to maintain and optimize the system.

Currently, various wireless network evaluation techniques are used in the art for evaluating the performance of a base station and optimizing a propagation environment in a CDMA cellular and PCS communication system. However, most of these prior arts move along a given path within the propagation environment of the base station. While collecting the response data according to the test call and reporting to the central control center for network management, there is a need for an operator who operates the measuring equipment.

In addition, according to the prior art to operate along the path of a specific service area, it becomes difficult to grasp the radio wave environment for a wide range of unspecified multiple service areas, and the inconvenience of requiring a mobile vehicle and an operator for each test occurs. .

Accordingly, a first object of the present invention is to provide an unmanned remote radio wave environment measurement system for collecting data and reporting to a central control center without an operator while moving data in a wide range of unspecified areas in a radio wave environment of a wide range of wireless communication service areas. .

It is a second object of the present invention to provide an unmanned remote radio wave environment measurement system for collecting data related to a radio wave environment of a specific radio communication service area for a predetermined period and reporting it to a central control center.

It is a third object of the present invention to provide a method of collecting data related to a radio wave environment of a wireless communication service area and transmitting the data to a central control center in real time.

In addition, a fourth object of the present invention is to provide an unmanned remote radio wave environment measurement system for efficiently utilizing the allowed radio communication resources.

1 is an operation of the unmanned remote radio environment measurement system according to the present invention.

2 is a block diagram of a radio wave environment measuring apparatus according to the present invention.

3 is a working flowchart of the radio wave environment measuring apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

13: CDMA base station

15: Unmanned remote radio wave environment measurement apparatus of the present invention

14, 120: terminal

100: GPS system

111: central processing unit

112: Roman

113: RAM

114: flash memory

In order to achieve the above object, the present invention provides a measurement system for collecting the performance and propagation environment of a wireless base station, comprising: receiving means for receiving a telemetry test plan from a central control center; Control means for controlling the telemetry test procedure; Means for determining the current position of the radio wave environment measurement system; Measuring means for generating a test call according to a telemetry test plan granted under the control of the control means and measuring a radio wave environment for a given frequency band; Storage means for storing the given measurement test plan and the measured radio wave environmental data; And an transmitting means for transmitting the radio wave environment data measured by the measurement system to a central control center.

Best Mode for Carrying Out the Invention Preferred embodiments of the radio wave environment measuring apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a method of operating an unmanned remote radio environment measurement apparatus according to the present invention. Referring to FIG. 1, an arbitrary unmanned remote radio wave environment measuring device 15 and a cellular or PCS terminal 14 according to the present invention are mounted on an arbitrary mobile vehicle 16 to measure the performance and the radio wave environment of a base station while moving freely. Done. At this time, the unmanned remote radio environment measurement apparatus according to the present invention receives the current location information from the GPS satellite, and reports it to the central control center 10 through the radio base station (13).

Meanwhile, the central control center 10 operating the wireless communication network transmits the measurement test plan to be measured by the telemetry device to the terminal 14 of the present invention attached to the mobile vehicle 16. As a preferred embodiment for transmitting the measurement test plan, it may be transmitted to the measurement apparatus of the present invention using a short message service (SMS) or data service using CDMA.

Subsequently, the unmanned remote radio wave environment measurement apparatus of the present invention generates a test call according to the test plan in a vehicle which changes its position at random and collects data for evaluating the performance of the base station and the radio wave environment according to the test plan. Transmission to the control center 10. As a preferred embodiment of the means for transmitting the collected data related to the radio wave environment to the central control center 10, an SMS service or a data service method using CDMA may be used.

As a second embodiment of the method for operating the unmanned remote radio wave environment measurement apparatus according to the present invention, a measurement apparatus and a terminal may be installed at a fixed position, and the change trend of the radio wave environment for a predetermined period may be collected and analyzed.

2 is a system configuration diagram of the unmanned remote radio wave environment measurement apparatus according to the present invention. The unmanned remote radio wave environment measuring apparatus of the present invention includes a central processing unit 11, a read only memory (ROM) 112, a random access memory (RAM) 113, and a flash memory connected to the central processing unit. 114) and a global positioning system (GPS) system unit 100, which is used in connection with a CDMA cellular or PCS terminal 120.

The ROM 112 includes a program necessary for operating the system, and the RAM 113 and the flash memory 114 store radio wave measurement test plans or collected measurement data as a means for storing data. The operation is performed under the control of the central processing unit 111. That is, the signal is transmitted and received to the terminal 120 under the control of the central processing unit 111.

When the power switch of the unmanned remote radio wave environment measurement device is turned on, the system program built in the ROM 112 is loaded into the RAM 113. After loading, the central processing unit 111 receives location information and time information from the GPS system 100, stores the RAM 113 in the RAM 113, and reports the power-on state to the center through the terminal 120. If there is a content in the flash memory 114 that should continue the measurement at the present time, the measurement is started according to the measurement method.

The central processing unit 111 of the measurement apparatus applies a corresponding call to the terminal 120 according to a given call processing type, periodically requests DM data from the terminal 120, and parses a parameter responded by the terminal 120 ( parsing). In addition, data necessary for analysis is extracted and stored in the flash memory 114. Meanwhile, a reporting period is set according to the measurement method stored in the flash memory 114 to transmit data stored for a predetermined time to the control center. In transmission, the radio wave measurement applied to the terminal 120 is stopped and an access for data transmission is attempted.

When the connection for data transmission is completed, the collected data is read from the flash memory 114 and transmitted to the control center through the terminal 120. At this time, if an error occurs during the transmission, retransmission is attempted a predetermined number of times, and if the threshold number is exceeded, measurement and data transmission are performed until the terminal 120 receives a command or a new test plan requesting data retransmission from the center. The terminal 120 changes to the DM mode and is in the standby state.

If there is a data retransmission request using the SMS (short message service) from the control center, the retransmission starts after the previously sent data, and when the data transfer is completed normally, the data in the flash memory 114 is deleted and the data is satisfied. Continue measuring.

In addition, when a condition or time for measuring the flash memory 114 has passed, the standby test state is maintained until a new test plan is transmitted from the center through the terminal 120. While maintaining the standby state, the central processing unit 111 periodically receives the position and time information from the GPS system 100 and stores it in the RAM 113 to receive the position information report command from the control center. Read from the RAM 113 and reports through the terminal 120.

Subsequently, when the test plan is transmitted from the control center through the terminal 120, the central processing unit 111 stores the data in the flash memory 114 to start the measurement from a designated time and proceed with data collection.

At this time, preferred embodiments of the measurement parameters measured by the radio wave environment measurement system according to the present invention are as follows.

That is, a preferred embodiment of the measurement parameters measured by the unmanned remote radio wave environment measurement apparatus of the present invention includes: pilot and finger signal strengths from a radio base station received by the terminal; A pilot data set managed by the terminal; Received field strength (RSSI) in a wireless communication network; Power adjustment data for power control in a wireless communication network; The terminal information; An auto call test; A logging mask; Event data of the terminal; Location information of the terminal; The state of the channel; Frame error rate; The base station information may be collected and transmitted to the central control center.

As a preferred embodiment of the data collected by the measuring device of the present invention, testing the pilot and finger signals is the most important factor in determining the service area and the service radius in a CDMA network, and is the location of the terminal connected to the equipment. The reception strength of the pilot measured by a (searcher) operation is collected based on the pilot strength of a cell currently being served.

In a preferred embodiment for measuring the call waiting state, the signal strength (Ec / lo) is measured by measuring the strength of a paging channel signal of a finger locked to an active service cell. ) Can be calculated and collected.

In addition, as a preferred embodiment for collecting the propagation environment data of the traffic state (in traffic), the measurement system of the present invention measures and calculates the signal strength of the finger that is locked in the traffic channel of the active cell in the current call, If it is under softer / soft handoff, up to three finger signal interference rates (Eb / No) can be calculated and collected.

On the other hand, as a preferred embodiment of the present invention for measuring the pilot set data, it is possible to collect a neighbor set (neighbor set) for each neighboring base station, the collecting form is to store the number of PN of each set according to the setting The PN offset and intensity may be measured and collected in the order of an active set, a candy date set, and a neighbor set.

As a preferred embodiment of the data collected by the measuring device of the present invention, it is possible to measure the strength of the received in-band signal including the mobile station receiver antenna, and to equalize the strength of the received signal at the end of the receiving modem. An automatic gain control loop is operated to measure the strength of the received power of the receiver of the mobile station.

In addition, as a preferred embodiment of the present invention, an automatic call test for collecting radio wave environment data by the measurement device includes: an idle state test step, a call by call test step, and a continuous It may include a continuous call test step.

On the other hand, as a preferred embodiment of the present invention, the collected terminal event data (mobile event data) is a call set-up time (call set-up time), call time (calling time), call type (call type), the cause of call disconnection ( drop reason, fail reason, and so on.

In addition, as a preferred embodiment of the GPS data that the measuring device system of the present invention reports to the central control center may include the latitude, longitude, altitude and speed of the terminal, and as a preferred embodiment for the channel state to report, (idle state), traffic state (traffic state), origin state (origin state), access state (access state) can be reported. In addition, the measurement apparatus of the present invention may include a base station identification (BID), network identification (NID), PN offset, etc. as a preferred embodiment of the base station information to report to the central control center.

3 is a working flowchart of the measuring device according to the present invention. Referring to Figure 3 describes the operation flow of the unmanned remote radio environment measurement apparatus as follows. When the program is started (211), it is checked whether there is a test plan 112 to be measured. Report (222). It then checks if there is a test plan and waits for a new test plan 212.

If a test plan exists, a corresponding call is applied to the terminal 213 to start data collection. As a preferred embodiment, the start time can be set 214 to confirm the test end time 216. The operation of collecting data 215 at a predetermined cycle and storing it in the flash memory is repeated until the end time is reached.

At this time, as a preferred embodiment, the measurement period may be in units of 1 second. When the test is due, the test is terminated and the center is ready to send the collected data. Upon receiving a response from the control center, the collected data is transmitted, and when the transmission is completed, the operation is repeated to check whether the test plan 212 is set again.

The foregoing has outlined rather broadly the features and technical advantages of the present invention to better understand the claims of the invention which will be described later. Additional features and advantages that make up the claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the invention disclosed may be readily used as a basis for designing or modifying other structures for carrying out similar purposes to the invention.

In addition, the inventive concepts and embodiments disclosed herein may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously changed, substituted, and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the unmanned remote radio wave environment measurement device according to the present invention is a measurement device that solves the problem of the conventional radio wave environment measurement equipment, and by freely moving an unspecified path by attaching the measurement device of the present invention to an arbitrary vehicle. By collecting data relating to the performance and radio environment of the radio base station, using measurement test plan commands received from the central control center, and using SMS and data services using CDMA cellular and PCS networks in transmitting the collected data; Eliminate the inconvenience of the prior art that the operator should be placed separately in the measurement vehicle, it is possible to operate the remote measurement device controlled by the central control center unattended.

In addition, since the central control center transmits a measurement method using SMS or data service using CDMA, data of an unspecified area is collected in real time and automatically transmitted or stored in memory.

Therefore, when using the unmanned remote radio wave environment measurement apparatus, since the radio wave environment of the radio communication service area is grasped in real time, it is possible to manage a high quality radio communication environment.

Claims (8)

In the measurement system for collecting the performance and radio environment of the wireless base station, Receiving means for receiving an unmanned telemetry test plan from a central control center; Control means for controlling the unmanned telemetry test procedure; Means for determining the current position of the radio wave environment measurement system; Measuring means for generating a test call according to an unmanned telemetry test plan granted under the control of the control means and measuring a radio wave environment for a given frequency band; Storage means for storing the granted unattended telemetry test plan and the measured propagation environmental data; Transmission means for transmitting the radio wave environment data measured by the measurement system to the central control center Unmanned remote radio wave environment measurement apparatus comprising a. The unmanned remote radio wave environment measurement apparatus according to claim 1, wherein the unmanned remote radio wave environment measurement device is mounted and operated in an unspecified transport vehicle moving freely. 2. The apparatus of claim 1, wherein the means for reporting a location to the central control center and for transmitting and receiving data comprises a Global Positioning System (GPS) system. The apparatus of claim 1, wherein the means for transmitting the data measured by the measurement system to the central control center includes a short message service (SMS) means or a data service means of a CDMA communication network. . The method of claim 1, wherein the means for transmitting the data measured by the measuring system to the central control center includes means for storing the data in the auxiliary storage device of the measuring system and transmitting the data using a data network. Radio wave environment measurement device. The unmanned remote radio wave environment measurement apparatus according to claim 1, wherein the unmanned remote radio wave environment measurement device collects radio wave environment data for a predetermined period from a base station or a fixed specific place and transmits the radio wave environment data to the central control center. 2. The apparatus of claim 1, wherein the receiving means for receiving the telemetry test plan from a central control center comprises short message service (SMS) means or data service means on a CDMA communication network. 2. The apparatus of claim 1, wherein the radio base station comprises a radio base station for digital cellular communications or personal digital communications (PCS).