JP2006093778A - Installation method of mobile communication base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize an installation method of a mobile communication base station in which a mobile base station communicating with an exchange can be installed by one installation person in a minimum time based on quality map information measured automatically. <P>SOLUTION: Every time when a mobile base station 3 is moved, a test signal for measuring the positional information and communication quality of the mobile base station 3 received from a GPS is transmitted to an exchange 7. In the exchange 7, a communication quality map table is generated at a quality map generating section 72 based on the positional information of the mobile base station 3 and the receiving quality of the test signal and transmitted to a portable terminal 1a carried by the installation person. Based on the quality map table displayed on the screen of the portable terminal 1a, the installation person installs the mobile base station 3 at a position where good communication is ensured between the mobile base station 3 and the exchange 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable base station that wirelessly relays between an exchange station connected via a wireless access point and a terminal, and in particular, movement for easily installing the portable base station in a place with good communication conditions. The present invention relates to a method for installing a communication base station.

  Currently, a cordless phone system using PHS has been introduced as a telephone call system on the premises. Using this system, a terminal such as PHS can be used to make a call while moving, and more efficient work can be performed. In a normal private telephone system, a base station serving as a parent unit of a PHS terminal (slave unit) is connected to a switching center (PBX) via a dedicated line, and each terminal can be connected to each other via a base station and a switching center . Extension numbers for calls are collectively managed by the exchange. The base station mainly performs wireless communication connection with a terminal via a wireless line and conversion of communication data between the wireless line and the wired line. As the wired communication line, a connection using a dedicated line or Ethernet (Ethernet / ETHERNET is a registered trademark owned by Fuji Xerox Co., Ltd.) is used. When the wired base station is connected to the trunk line and the wireless line via an access point, the base station can be configured as a new wireless base station, so that the terminal can make a call in a wider service area. However, when the quality of the radio line with the main line is not good, the call quality of the terminal connected to the radio base station is also deteriorated. Wireless base stations are installed in different locations depending on the distance and positional relationship between the access point and the wireless base station. Therefore, it is necessary to locate the wireless base station in a location with good communication conditions with respect to the access point. is there.

Patent Document 1 discloses a cordless telephone composed of an exchange, a base station apparatus, and a mobile station apparatus in order to accurately and efficiently perform on-site test communication for determining the installation location of a radio base station. The system is equipped with a field strength measuring unit and a visual audible display unit for the measurement result in the mobile station device, and the mobile station device is preferably installed using the measurement result visually displayed in real time using the field strength measuring means. A method is disclosed.
In Patent Document 2, in order to identify a failure factor that occurs during wireless communication of a terminal device connected to a network via an access point via a wireless line, the server device has a unique address such as a MAC address that the terminal device has. Correspondingly acquire the position information of the specific terminal device, the acquired position information and the number of transmission retries made at that position, the number of discarded packets generated at the time of transmission, the number of lost frames due to the reception buffer full, the number of duplicate packets, Wireless communication quality is determined based on data such as the number of received CRC errors, and the determined wireless communication quality is recorded in association with the location information where the terminal device communicated, and based on the recorded information Thus, the server device overlaps the LAN network configuration diagram and the plan view, and then relates to the potential installation location of the wireless LAN terminal device. Wireless LAN system so as to visually display is disclosed a communication quality management terminal connected to the network.
JP-A-7-288498 JP 2002-223218 A

  However, for example, at the time of disaster or accident processing, a new wireless base station is installed, and an emergency such that many terminal devices (PHS) perform recovery work while exchanging information with each other via the wireless base station. It must be easy to install at times. In the methods according to Patent Literature 1 and Patent Literature 2, although the communication quality between the terminal and the radio base station can be measured, the optimum installation location between the radio base station and the access point connected to the main line side There is no consideration on how to search in real time. It cannot be used to measure the communication quality between a wireless base station to which a wireless LAN adapter is connected and an access point connected to a trunk line in a short time, and to easily install a wireless base station by one installer. . There are other methods to bring a dedicated measuring instrument to the site as a measuring means and determine the installation location of the radio base station based on the measurement result, but it lacks mobility for the above purpose and is not practical. .

  Therefore, the present invention was made to solve the above problems, and the portable base station automatically measures the transmission speed of communication performed with the exchange station with a simple operation, Furthermore, a communication quality map for deciding the installation location can be displayed on the terminal, and the portable base station is provided with user interface means such as a keyboard and LCD panel to operate in severe conditions such as rain, snow, smoke, etc. Therefore, it is an object of the present invention to provide a method for installing a mobile communication base station that can be used for disaster countermeasures and lifesaving, which can be installed and operated with a minimum measurement time by a single installer.

  The present invention is an installation method of a mobile communication base station that installs the portable base station for performing good wireless communication between an exchange station and a portable base station capable of wireless communication with a mobile terminal. Each time the portable base station is moved, the position information of the portable base station sent from the GPS is received by the receiving unit of the portable base station, and then transmitted to the exchange. Based on the position information of the portable base station and the signal quality of the wireless communication transmitted from the portable base station to the switching station in the switching station, the installation position of the portable base station and the After creating a map table indicating a relationship with signal quality of wireless communication, after transmitting the map table to the portable base station, the map table is transferred from the portable base station to the portable base station. Sent to the mobile terminal for wireless communication, and the screen of the mobile terminal A mobile communication base characterized in that, based on the information obtained from the indicated map table, the portable base station is installed at a position where communication between the portable base station and the exchange is good. Provide station installation methods.

  According to the present invention, each time the portable base station is moved, the position information of the portable base station sent from the GPS is received by the receiving unit of the portable base station, and then sent to the switching station. The mobile base station is installed based on the location information of the mobile base station transmitted from the mobile base station and the signal quality of the wireless communication transmitted from the mobile base station to the mobile station. After creating a map table indicating the relationship between the position and the signal quality of the wireless communication, after transmitting the map table to the portable base station, from the portable base station to the portable table Communication between the portable base station and the exchange is improved by information obtained from the map table transmitted to the mobile terminal that performs wireless communication with the base station and displayed on the screen of the mobile terminal. A special way to install the portable base station in position As a result, the portable base station can automatically measure the transmission speed of communications with the switching center with a simple operation, and can display a communication quality map for determining the installation location on the terminal. Disasters that can be installed and operated by a single installer with minimum measurement time without providing user interface means such as a keyboard or LCD panel for operation in harsh conditions such as rain, snow, smoke, etc. It is possible to realize a mobile communication base station installation method that can be used for countermeasures and lifesaving.

Hereinafter, a portable base station system according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram illustrating a configuration example of a portable base station system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a configuration example of a portable base station and an exchange station according to the embodiment of the present invention.
FIG. 3 is a diagram illustrating a relationship example between the communication speed and the communication quality according to the embodiment of the present invention.
FIG. 4 is a diagram showing an example of a communication quality measurement chart according to the embodiment of the present invention.
FIG. 5 is an example of a quality map according to the embodiment of the present invention.
FIG. 6 is a diagram showing an example of the relationship between the return communication speed and the transmission frequency to the terminal according to the embodiment of the present invention.
FIG. 7 is a diagram illustrating an example of a communication flow according to the first half of the communication quality measurement according to the embodiment of the present invention.
FIG. 8 is a diagram illustrating an example of a communication flow according to the second half of the communication quality measurement according to the embodiment of the present invention.
FIG. 9 is a diagram showing an example of a communication flow for call connection according to the embodiment of the present invention.
FIG. 10 is a diagram showing an example of a communication flow for registering a portable base station according to the embodiment of the present invention with an exchange.
FIG. 11 is a diagram showing an example of a communication flow for call connection between slave units in different areas according to the embodiment of the present invention.

  In the portable base station system according to the mobile communication base station installation method of the invention, the portable base station automatically measures the transmission speed of communication with the exchange station with a simple operation, and further determines the installation location. The communication quality map to be determined can be displayed on the terminal, and the portable base station can be operated by one person without providing a user interface means such as a keyboard or LCD panel to operate in severe conditions such as rain, snow, smoke, etc. Every time the portable base station is moved, the purpose of realizing a disaster countermeasure that can be installed and operated with the minimum measurement time by the installer, and a method of installing a mobile communication base station that can be used for lifesaving, After the position information of the portable base station sent from the GPS is received by the receiving unit of the portable base station, it is transmitted to the switching station, and the position information of the portable base station is transmitted by the switching station. And the general type Based on the radio communication signal quality transmitted from the ground station to the exchange station, after creating a map table showing the relationship between the installation position of the portable base station and the radio communication signal quality, After transmitting the map table to the portable base station, the portable table transmits the map table to a portable terminal that performs wireless communication with the portable base station, and is displayed on the screen of the portable terminal. Further, the portable base station is installed at a position where communication between the portable base station and the exchange station is good based on information obtained from the map table.

The configuration of the portable base station system will be described.
The portable base station system shown in FIG. 1 includes a terminal 1a, a terminal 1b, a portable base station 3, an access point 5, and an exchange station 7. The terminal 1a and the portable base station 3 are coupled by a terminal-side radio line 2. The access point 5 and the portable base station 3 are coupled to each other via a trunk-side radio channel 4a, and the access point 5 and the terminal 1b are coupled to each other via a trunk-side radio channel 4b. The exchange 7 and the access point 5 are connected by a main line 6.
The portable base station 3 shown in FIG. 2 includes a sine wave transmission unit 31, a sine wave table 32, a GPS (Global Positioning System) reception unit 33, a position information generation unit 34, a test data generation unit 35, and a return communication speed calculation unit 36. And a battery 39. The exchange 7 includes a reception data storage unit 71, a quality map generation unit 72, and a registration information management unit 73.
Here, the terminal 1b is connected to the exchange 7 via the trunk-side radio line 4b and the access point 5, and performs communication using the public network. Next, the mobile base station 3 that can be combined with a large number of terminals is connected to the terminal when a large number of terminals need to be exchanged by connecting to the switching center 7 in order to handle an accident that occurred in the vicinity of the terminal 1b. The case where it becomes necessary to install near 1b is demonstrated.

The operation of the portable base station system will be described. This will be outlined with reference to FIG.
First, the installer of the portable base station 3 operates the terminal 1 a to transmit a signal for starting the installation location measurement of the portable base station 3 to the exchange 7. A measurement start signal is transmitted from the exchange 7 to the terminal 1a. From the portable base station 3, the current position information and the communication speed test data are transmitted while the location that is the installation candidate is moved. The exchange 7 measures the communication quality based on the received communication speed test data, and creates a quality map together with the position information. A signal related to the end of the installation location measurement is transmitted to the switching center 7 from the terminal 1a that has finished moving the installation candidate location together with the portable base station 3. A quality map is transmitted from the exchange 7 to the terminal 1a and displayed. The portable base station 3 is installed by the installer based on the quality map image.

This will be further described with reference to FIG.
The current position information transmitted from the portable base station 3 is obtained by the position information generating unit 34 based on the GPS signal received by the GPS receiving unit 33 of the portable base station 3. In the test data generation unit 35, a test data packet for communication quality measurement is generated and transmitted. The format of test data is not specified. The test data is received at the exchange 7. The amount of test data received and exchanged is counted. After a predetermined time, the exchange 7 obtains the total amount of test data and divides by the time required for data exchange to obtain the data communication speed. The communication speed changes according to the distance of the main line side wireless line 4a and according to the influence of an obstacle or the like. Since synchronization and retransmission processing in the interface physical layer that performs data input / output of the trunk-side radio channel 4a are also changed, the data communication speed varies depending on the moving location of the portable base station 3. The received data storage unit 71 stores the obtained current position information and communication speed information.

  The test data received by the exchange 7 is transmitted back to the portable base station 3 and received by the communication speed calculation unit 36 of the portable base station 3. The return communication speed calculation unit 36 detects the communication speed in the same manner as described above. The sine wave transmission unit 31 generates a sine wave signal based on the sine wave table having a predetermined frequency from the sine wave table 32 according to the detected communication speed. The sine wave signal is received by the terminal 1a via the terminal-side wireless line 2. The sine wave signal generated by the sine wave transmission unit 31 is generated as a signal having a frequency corresponding to the communication speed. A mobile person who stores the terminal 1a in the installer's pocket and carries the portable base station 3 with both hands can know the outline of the communication speed based on the frequency of the sound generated from the speaker of the terminal 1a. The search for the installation location can be performed smoothly. The determination of the end of measurement can be easily performed, and the work of the installer who cannot use both hands can be performed safely and efficiently. When the terminal 1a is operated and a measurement end signal is transmitted, the quality map generated by the quality map generator 72 of the exchange 7 is transmitted to the terminal 1a and displayed on a display unit (not shown) of the terminal 1a.

  As described above, the portable base station 3 driven by the battery 39 is easily installed in a place where the communication condition of the trunk side wireless line 4a is good among the places where the installation is necessary, and supports emergency recovery work there. I do. The registration information management unit 73 stores registration management information for managing call numbers and the like of a plurality of terminals (not shown) possessed by the worker. The registration management information is used to make an extension call in the field. An operation as a base station for the exchange 7 is performed.

FIG. 3 shows a correspondence relationship of communication quality with respect to the obtained communication speed.
Communication quality is defined based on the communication speed obtained from the communication speed measurement signal.
The communication speed measurement signal generated by the test data generation unit 35 of the portable base station 3 is described as using a so-called communication speed measurement signal. As another method, the current position information may be transmitted in packets having different transmission rates. The transmission packet is generated as a signal to be transmitted at, for example, 30 kbps, 100 kbps, 300 kbps, 1 Mbps, and 3 Mbps. If necessary, a parity code or an error detection code may be attached to the signal of the packet. The test data generated by the test data generation unit 35 is received by the reception data storage unit 71 of the switching center 7. If the position information received by a packet transmitted at 30 kbps is the same as the position information received by a packet having a communication speed of 100 kbps, it is determined that communication is possible at 100 kbps or higher by the trunk side wireless line 4a. The

FIG. 4 is a management table showing the relationship between the measurement time, the coordinates as position information, the measured data communication speed, and the communication quality for each movement point of the portable base station 3 stored in the received data storage unit 71. is there.
FIG. 5 is a communication quality map generated by the quality map generator 72 based on the management table.
In the figure, the ■ (black square) mark is the measurement start point, and then the ▲ (black triangle) mark that arrives via multiple ● (black circles) marks is the measurement end point. . The communication quality map is created using the measurement results of the coordinates and the communication speed at these points. The boundary of the quality value in the figure is a boundary region obtained by approximating the communication quality value at each point. Each area is created as a map color-coded for each communication quality value. The installer can determine a suitable installation location of the portable base station 3.

  FIG. 6 shows the relationship of the sine wave frequency of the downlink voice generated from the communication speed calculated by the loopback communication speed calculation unit 36 transmitted from the sine wave transmission unit 31. The logarithmic value of the sine wave frequency with respect to the logarithmic value of the communication speed has a linear relationship. When the installer moves at the candidate installation location of the portable base station 3 while listening to the sine wave frequency of the downlink voice, the location where the frequency is low is a location that is not suitable for installation. To change. Since the sine wave frequency is generated from the terminal 1a in the pocket, information on the turning point when the candidate moves by the installer while performing so-called zigzag scanning is obtained.

A communication flow of the portable base station system will be described with reference to FIGS.
P1 to P3 shown on the right side of the figure are processing phases of the communication flow divided into three. P1 is a processing phase until the terminal 1a instructs the start of measurement and the exchange 7 starts the measurement. P2 is a phase in which the portable base station 3 notifies the exchange station 7 of the location information of the portable base station 3 and exchanges test data for measuring communication quality between the exchange station 7 and the portable base station 3 It is. P3 is a phase in which the terminal 1a instructs the end of the measurement, and the switching center 7 notifies the terminal 1a of the measurement result information obtained by the measurement. This will be described in order below.

  First, in phase 1, the installer who brings the portable base station 3 and the terminal 1a to the installation site connects (calls) with a special number that starts the measurement of communication quality by operating the terminal 1a. The portable base station 3 accepts a call transmitted via the terminal-side radio line 2 (incoming call). The portable base station 3 transmits a voice “accepted” indicating acceptance to the terminal 1 a via the terminal-side wireless line 2. The installer confirms that it has been accepted by listening to this voice, and then disconnects the call. The portable base station 3 also accepts disconnection. The installer moves around the installation location while holding the portable base station 3 and the terminal 1a. The portable base station 3 instructs the switching center 7 to start communication quality measurement via the trunk side wireless channel 4 a and the access point 5. The exchange 7 accepts this and starts to receive test data for measuring the communication quality of the trunk side radio channel 4a.

  In the phase 2, when the exchange 7 receives the start of measurement, the portable base station 3 periodically transmits the position information acquired from the GPS means provided therein to the exchange 7. The exchange 7 acquires and holds position information. The portable base station 3 transmits a communication quality measurement test data packet to the switching center 7. The switching center 7 counts the amount of test data that can be exchanged from the received test data, and returns the received test data and transmits it to the portable base station 3. The exchange of position information and test data is repeated for a predetermined time or until a predetermined amount of data is reached. The exchange 7 calculates the data communication speed by dividing the total amount of test data by the time taken for data exchange. As the transportable base station 3 moves, the transmission distance of the trunk-side radio channel 4a varies, and the synchronization and retransmission processing in the interface physical layer that performs data input / output of the trunk-side radio channel 4a changes due to the influence of obstacles, etc. To do. A data communication speed that varies depending on the location of the portable base station 3 can be obtained. The switching center 7 creates a management table describing the communication quality value for the intermediate point of the position information acquired from the start to the end of the test data transmission using the correspondence table between the data communication speed and the communication quality value.

  In phase 3, the installer operates terminal 1a to connect (call) with a special number indicating the end of communication quality measurement. The portable base station 3 accepts this via the terminal-side radio line 2 (incoming call), and transmits a voice “accepted” indicating that it has been accepted to the terminal 1 a via the terminal-side radio line 2. The installer confirms that the connection has been accepted by listening to the voice and disconnects the call. The portable base station 3 also accepts disconnection. The portable base station 3 stops providing location information to the switching center 7 and instructs the switching center 7 to end the communication quality measurement via the trunk-side radio channel 4 a and the access point 5. The switching center 7 ends the test data transmission for measuring the communication quality of the trunk side wireless channel 4a. The switching center 7 creates a communication quality map with reference to the created management table. The exchange 7 generates a signal obtained by compressing and coding the created image data by a method such as JPEG (Joint Photographic Coding Experts Group), and transmits the signal to the terminal 1a. The communication quality map transmitted in a mail attachment format or the like is displayed on the LCD panel of the terminal 1a. The installer refers to the displayed quality map and installs the portable base station 3 at a suitable position.

After the portable base station 3 is installed, the terminal 1 b communicates via the portable base station 3.
A communication flow in the “local exchange mode” performed by the terminal 1a and the terminal 1b via the portable base station 3 will be described with reference to FIG.
First, P4 is a phase in which the terminal 1a calls the terminal 1b, and the portable base station 3 that receives the call calls the terminal 1b.
A user who owns the terminal 1a makes a call with the extension number "1002" of the terminal 1b. The portable base station 3 accepts this and transmits ringing tone data indicating that a call is being made to the terminal 1a. The terminal 1a starts voice data communication with the portable base station 3 at the time of calling, and the received ringing tone data is output to the speaker. The audio signal input from the microphone is transmitted to the portable base station 3, but is not yet established on the terminal 1b, and thus is discarded on the received portable base station 3 side. The portable base station 3 analyzes the acquired connection number “1002”, and if it is confirmed that “1002” is an extension registered to itself, the terminal 1b to which “1002” is allocated is called. The called terminal 1b returns a call response to the portable base station 3 and outputs a ringing tone.

P5 is a phase in which the incoming terminal 1b is connected, a call is made between the terminal 1a and the terminal 1b, and the terminal 1b is disconnected.
When the user who owns the terminal 1 b who has heard the ringing tone presses the connection button, a connection response is transmitted to the portable base station 3. Voice data communication with the portable base station 3 is started. The audio data received by the terminal 1 b is output as an audio signal by the speaker, and the audio signal input from the microphone is transmitted to the portable base station 3. Upon receiving the connection response, the portable base station 3 connects the audio data channels of the terminal 1a and the terminal 1b, transmits the audio data output from the terminal 1a to the terminal 1b, and conversely receives the audio data output from the terminal 1b. It transmits to the terminal 1a. As a result, a call can be made between the terminal 1a and the terminal 1b.
Next, when the user having the terminal 1b presses the disconnect button, the terminal 1b transmits the disconnect information to the portable base station 3 and ends the voice data input / output. The portable base station 3 that has received the disconnection information ends the connection with the terminal 1b. The voice data from the terminal 1b is switched to the cutting sound data and transmitted to the terminal 1a. The terminal 1a that has received the cutting sound data outputs a cutting sound from the speaker. The user recognizes that the user has been disconnected and presses the disconnect button to end the connection with the portable base station 3.

A communication flow in “system switching mode” when the switching center 7 performs switching control will be described with reference to FIG.
P6 is a phase in which the portable base station 3 is powered on and establishes a radio link with the access point 5.
First, the portable base station 3 is powered on, and a wireless link with a nearby access point is started via the trunk-side wireless link 4a. When linking, a link is established with an access point having the same ID as the ID assigned to each wireless interface in the portable base station 3. In a normal wireless LAN system, ESS-ID is used. Here, it is assumed that a link is established with the access point 5, and the portable base station 3 can perform data communication with the switching center 7 via the trunk-side wired line 6 connected to the access point 5.

P 7 is a processing phase in which the portable base station 3 is registered in the exchange 7.
On the portable base station 3 side, a registration destination exchange ID and an area number assigned to itself are set. The exchange ID may use an IP address. The base station registration process is started in the portable base station 3. The exchange 7 that has detected the start of the base station registration process in the portable base station 3 searches for an unregistered base station. Although the search method is not specified in particular, in this example, while changing the destination IP address within a certain range, an inquiry command peculiar to base station registration is transmitted, and a response from the base station matching the IP address is received and registered. To do. The portable base station 3 receives the inquiry command for its own IP address, and if the IP address matches the registration destination exchange ID already set, the portable base station 3 sends the area number to the exchange 7. A response is sent with. The exchange 7 recognizes that it has found an unregistered base station and registers the base station with the acquired area number. Although the area number assigned to the portable base station 3 is set on the base station side, it may be set on the exchange side.

P8 is a processing phase in which the registered portable base station 3 provides the switching center 7 with the terminal registration information held by itself.
The exchange 7 requests terminal registration information from the registered portable base station 3. The portable base station 3 that has received this transmits the terminal registration information managed by itself to the exchange 7. The provided terminal registration information includes a unique ID assigned at the time of terminal manufacture and an extension number assigned at the time of terminal registration. Upon receiving the terminal registration information, the switching center 7 performs terminal registration in such a manner that the information of each terminal is subordinate to the area number set at the time of base station registration.
For the terminal registration, for example, when the extension number of the terminal registered in the base station in area 1 is “1001”, a data area is provided for each area, such as managing as “1 # 1001”. It is managed by a database with a directory structure that stores terminal information in When the terminal registration is completed, the base station registration process is completed, and the exchange control can be performed in the “system exchange mode”.

A communication flow in the “system exchange mode” will be described with reference to FIG.
Here, the communication is performed via the portable base station A (portable base station 3) installed in the area “1” and the portable base station B (not shown) installed in the area “2”. An example in which the terminal 1a in "1" and the terminal 1c (not shown) in the area "2" have a common extension number "1001" will be described.
When the terminal 1a in the area 1 makes a call and connects to the terminal 1c in the area 2, P9 indicates the address of the portable base station B to which the switching terminal 1c belongs and the portable base station to which the terminal 1a belongs. This is a processing phase for transmission to the station A.
First, in order to call the terminal 1c, the user who owns the terminal 1a makes a call with the extension number “2 # 1001” accompanied by the area number “2”. The portable base station A accepts this and analyzes the connection number “2 # 1001”. At the same time, inquiry sound data indicating inquiry is transmitted to the terminal 1a. The terminal 1a starts voice data communication with the portable base station A at the time of calling, and the received inquiry sound data is output to the speaker. The audio signal input from the microphone is transmitted to the portable base station A, but since the connection with the terminal 1c has not been established yet, the received audio signal is discarded on the portable base station A side. The portable base station A with the area number “1” confirms that the call is to the external area because the area number is “2”, and sends the call information “2 # 1001” to the exchange. Is attached to the base station. The switching center accepts this, searches for registration information owned by the registration information management unit, and whether the base station of area “2” is registered, and the terminal of “1001” subordinate to this base station is registered. Make sure that When the registration is confirmed, the exchange provides the portable base station A with the address (IP address or the like) of the portable base station B.

P10 is a processing phase in which the portable base station A makes a connection request to the portable base station B, and the portable base station B calls the terminal 1c that is the destination.
The portable base station A that has acquired the address of the portable base station B next makes a connection request to the portable base station B with the call information “1001” attached. The portable base station B that has received the connection request calls the terminal 1c to which the extension number “1001” is assigned. The called terminal 1 c returns a call response to the portable base station 3. Output ringing tone. The portable base station B that has received the call response transmits an acceptance response to the portable base station A, and the portable base station A that has received the response then transmits ringing tone data indicating that the call is being made to the terminal 1a. To do.

P11 is a processing phase in which the incoming terminal 1c is connected and a call is started between the terminal 1a and the terminal 1c.
When the user who owns the terminal 1c who has heard the ringing tone presses the connection button, the terminal 1c transmits a connection response to the portable base station B. Voice data communication with the portable base station B is started. The terminal 1c pronounces the received audio data from the speaker. An audio signal input from the microphone is transmitted to the portable base station B. The portable base station B that has received the connection response transmits a connection response to the portable base station A. Receiving this, the portable base station A starts voice data communication with the portable base station B. At the same time, the transmission of the ringing tone data to the terminal 1a is terminated, and the voice data from the terminal 1c transmitted from the portable base station B is transmitted. The voice data from the terminal 1a is transmitted to the portable base station B. As described above, a call can be made between the terminal 1a and the terminal 1c via the portable base station A and the portable base station B.

In the portable base station system, a large number of people can be installed using a terminal (PHS) by installing the portable base station 3 at a point where good communication quality can be ensured, for example, by a single installer. Even when urgent business is performed, communication of a large number of PHS can be managed on site and communication with a remote place can be easily performed.
Even if the trunk-side radio line 4a malfunctions during operation in the “system exchange mode” and the portable base station 3 cannot communicate with the exchange 7, the extension call centered on the portable base station 3 is possible. Can be continued, that is, in the subsequent connection, the exchange process can be performed in the “local exchange mode”, and a flexible communication environment according to the use environment can be provided.

In this example, if a call is made to the same extension number in another area, the extension number is attached with the area number, but if each terminal is registered with an extension number that does not overlap in advance, the area number is There is no need to accompany it.
Further, in this example, the case where portable base stations perform call connection in cooperation with each other has been described. The base station operates in the same manner even if one of the base stations is a conventional fixed base station that is directly connected to the LAN.
Furthermore, although the terminal has described the realization of voice communication by a voice terminal such as PHS, it can be applied as a means of multimedia communication including images using a PDA or the like.
Moreover, the case where the portable base station 3 generates its own location information based on the received GPS signal has been described. The position information can be operated in the same manner by using an acceleration sensor mounted on a portable base station and using position information obtained by integrating the output of the acceleration sensor twice.

  According to the portable base station system of the present embodiment, every time the portable base station 3 is moved, the position information of the portable base station 3 sent from the GPS is received by the portable base station. Is transmitted to the switching station 7, the location information of the portable base station 3 and the wireless communication signal transmitted from the portable base station 3 to the switching station 7. Based on the quality, a map table showing the relationship between the installation position of the portable base station 3 and the signal quality of the wireless communication is created by the quality map generation unit 72, and then the map table is moved to the portable base station. After transmitting to the station 3, the map table is transmitted from the portable base station 3 to the portable terminal 1a that performs wireless communication with the portable base station 3, and is displayed on a screen (not shown) of the portable terminal 1a. According to the information obtained from the map table, the general Since the portable base station 3 has a special method of installing the portable base station 3 at a position where the communication between the base station 3 and the exchange 7 is good, the portable base station 3 can be exchanged with a simple operation. The transmission speed of communication with the station 7 can be automatically measured, and a communication quality map for determining the installation location can be displayed on the terminal 1a. The portable base station 3 has rain, snow, smoke, etc. Disaster countermeasures to install and operate the portable base station 3 with a minimum measurement time by one installer without providing user interface means such as a keyboard or LCD panel (not shown) for operating in harsh conditions, The installation method of the mobile communication base station 3 that can be used for lifesaving can be realized.

  The present invention can be applied to a portable base station apparatus that has an exchange function for a plurality of terminals such as PHS and is wirelessly coupled to an exchange station and easy to install.

It is a block diagram which shows the structural example of the portable base station system which concerns on implementation of this invention. It is a figure which shows the structural example of the portable base station and switching center which concern on implementation of this invention. It is a figure which shows the example of a relationship between the communication speed which concerns on implementation of this invention, and communication quality. It is a figure which shows the example of a communication quality measurement chart which concerns on implementation of this invention. It is a figure of the example of the quality map which concerns on implementation of this invention. It is the figure which showed the example of a relationship between the return communication speed concerning the implementation of this invention, and the transmission frequency to a terminal. It is the figure which showed the example of the communication flow which concerns on the first half of the communication quality measurement which concerns on implementation of this invention. It is the figure which showed the example of the communication flow which concerns on the second half of the communication quality measurement which concerns on implementation of this invention. It is the figure which showed the example of the communication flow of the telephone call connection which concerns on implementation of this invention. It is the figure which showed the example of the communication flow which registers the portable base station which concerns on implementation of this invention with an exchange. It is the figure which showed the example of the communication flow of the call connection between the subunit | mobile_units of another area which concerns on implementation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Terminal 2 Terminal side radio | wireless line 3 Portable base station 4a, 4b Trunk side radio | wireless line 5 Access point 6 Trunk side side wired line 7 Switching office 31 Sine wave transmission part 32 Sine wave table 33 GPS reception part 34 Position information generation part 35 Test data generation unit 36 Return communication speed calculation unit 39 Battery 71 Reception data storage unit 72 Quality map generation unit 73 Registration information management unit

Claims (1)

An installation method of a mobile communication base station for installing the portable base station for performing good wireless communication between an exchange station and a portable base station capable of wireless communication with a portable terminal,
Each time the portable base station is moved, the position information of the portable base station sent from the GPS is received by the receiving unit of the portable base station, and then transmitted to the exchange.
Based on the position information of the portable base station and the signal quality of the wireless communication transmitted from the portable base station to the switching station in the switching station, the installation position of the portable base station and the After creating a map table indicating a relationship with signal quality of wireless communication, after transmitting the map table to the portable base station, the map table is transferred from the portable base station to the portable base station. Transmitted to the mobile terminal for wireless communication,
The portable base station is installed at a position where communication between the portable base station and the exchange is good based on information obtained from the map table displayed on the screen of the portable terminal. A feature of a mobile communication base station installation method.

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