JP2000138627A - Radiotelephone repeater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiotelephone repeater where a connection hit rate is enhanced by avoiding a connection failure due to a busy radio channel of a radiotelephone base station. SOLUTION: In the case of receiving a link channel assignment reject message denoting a connection reject from a radiotelephone base station CS 301, the radiotelephone repeater RP 201 decides whether or not to try reconnection depending on the reasons of the assignment reject, selects other radiotelephone base station than the rejected radiotelephone base station and transmits a link channel setup request SQ 6 to the selected radiotelephone base station CS 302. Furthermore, the radiotelephone repeater RP 201 sorts radio waves received from the radiotelephone base stations in the order of levels, and selects a radiotelephone base station whose order number is equivalent to a random number generated in the radiotelephone repeater RP 201 so as to distribute the load of traffic. Furthermore, the radiotelephone repeater RP 201 collects traffic data such as a call loss rate or link channel setup request reception number of times and a call connection hit number of times from the radiotelephone base stations, decides whether or not any radiotelephone base station has a low call loss rate, selects the radiotelephone base station when its call loss rate is lower than a prescribed condition so as to select a radiotelephone base station with low traffic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless relay device for general wireless communication.

In particular, the Association of Radio Industries and Businesses (ARIB: As
sociation of Radio Industries and Business).
A typical example is a simplified mobile phone in which "-28" is established.

[0003]

2. Description of the Related Art RCR STD-28 defines a radio transmission system and a signal format. The signal format includes a control channel for carrying information for notifying the connection of a radio communication call, the status of a radio telephone base station, and the like. , Voice data, and a communication channel for receiving message information defined by a call connection protocol. The control channel includes a link channel establishment request message as a connection request signal transmitted from the radio telephone terminal to the radio telephone base station and a link as a connection response signal transmitted from the radio telephone base station to the radio telephone terminal. There is a channel assignment message.
The wireless telephone relay device transmits a link channel establishment request message from the wireless telephone terminal to the wireless telephone base station,
The wireless telephone base station determines a frequency to be used in a call, transmits a link channel assignment message to the wireless telephone relay device with information such as the frequency. The wireless telephone base station
If it is determined that the call cannot be made due to the frequency or resources available for the call or other reasons, a link channel assignment reject message is transmitted to the wireless telephone relay device as a connection response signal. Upon receiving the link channel assignment rejection message, the wireless telephone relay device transmits a link channel assignment rejection message having the same content to the wireless telephone terminal to the wireless telephone terminal. This wireless telephone relay device is disclosed in
As disclosed in the related art of Japanese Patent Application Laid-Open No. 0-65601, a radio telephone relay apparatus transmits and receives radio waves of a radio telephone base station and radio waves of a radio telephone terminal, so that the use range of the radio telephone terminal can be easily expanded. ing.

[0004]

In the communication between the wireless telephone terminal and the wireless telephone base station via the wireless telephone relay device, the wireless telephone relay device receives a link channel establishment request from the wireless telephone terminal. The relay device transmits a link channel establishment request to the wireless telephone device, and receives a link channel assignment rejection from the wireless telephone base station,
The wireless telephone relay device transmits a link channel rejection to the wireless telephone terminal, causing a problem that a call connection fails. That is,
Upon receiving the link channel assignment rejection message, the wireless telephone terminal determines that the connection has failed and sets a busy tone, or sends a link channel establishment request message to a wireless telephone base station other than the wireless telephone base station to which the link channel assignment rejection message was transmitted. Although it is assumed that a new call connection is made, which method is used depends on the implementation of the wireless telephone terminal. For this reason, there is a problem that it is difficult for a wireless telephone terminal that determines that connection has failed immediately upon receiving the link channel assignment rejection message to make a call without difficulty.
Further, if the wireless telephone terminal is already in a call with the wireless telephone base station via the wireless telephone relay device, there is a link channel establishment request from another wireless telephone terminal to the wireless telephone relay device, and the wireless telephone terminal In order for the relay device to receive a link channel assignment rejection from the wireless telephone base station and for the wireless telephone relay device to transmit a link channel establishment request to another wireless telephone base station and perform a call, the wireless telephone base station of the detour source A problem arises that the station must be disconnected.

[0005] In the radio telephone repeater, as a criterion to be selected by a radio telephone base station, a radio telephone base station having a higher reception level of a surrounding radio telephone base station is preferentially selected. When a plurality of wireless telephone repeaters having this selection method are installed in the same area, there is a problem that all the wireless telephone repeaters select a specific wireless telephone base station having a high reception level. There is a problem that the traffic is increased only in the base station, and the connection is often failed in the wireless telephone terminal. Also, in a wireless telephone relay device, when the traffic of the wireless telephone base station selected by the wireless telephone relay device is constantly high, the wireless telephone relay device does not depend on the traffic volume of the wireless telephone base station. There is a problem that a wireless telephone terminal in the area of the relay device often fails in connection due to a busy wireless line. Also, even when the traffic is high only for a certain time period in the radio telephone base station selected by the radio telephone relay device, the connection fails in the high traffic time period because the radio telephone relay device does not depend on the traffic. There is a problem that there are many.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radio telephone repeater which can avoid a connection failure due to a radio line busy of a radio telephone base station and can increase a connection success rate. Another object of the present invention is to enable a call to another wireless telephone base station without disconnecting the detour source wireless telephone base station, that is, to make a call simultaneously with a plurality of wireless telephone base stations. An object of the present invention is to provide a wireless telephone relay device that is enabled. Still another object of the present invention is to provide a wireless telephone relay device in which the load of traffic is dispersed to increase the success rate of connection to a wireless telephone base station. It is still another object of the present invention to provide a wireless telephone relay device capable of providing a service convenient for a user of a wireless telephone terminal by statistically increasing a connection success rate, and a wireless communication system having the same. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention receives a connection request signal for wireless communication from a wireless telephone terminal and transmits the signal to a wireless telephone base station. A wireless telephone relay device for receiving a wireless communication connection response signal and transmitting the wireless communication connection response signal to the wireless telephone terminal, the content of the received wireless communication connection response signal from the wireless telephone base station (for example, link channel allocation Rejection)
A connection request signal for wireless communication (for example, a link channel establishment request) to a wireless telephone base station other than the wireless telephone base station without transmitting a connection response signal (for example, link channel rejection) for the wireless communication to the wireless telephone terminal. ) Is transmitted to the wireless telephone relay device. That is, the present invention provides a wireless telephone base station that receives a connection request rejection without transmitting a link channel assignment rejection to a wireless telephone terminal at the stage of receiving a link channel assignment rejection from a wireless telephone base station transmitting and receiving radio waves. A control unit (a radio unit) for transmitting a link channel establishment request after performing a capturing operation of a control channel other than the above, selecting the wireless telephone base station if capturing is possible, performing a switching operation to the wireless telephone base station, This is a wireless telephone relay device having a telephone base station analysis unit) to prevent communication connection failure due to a wireless line busy. Therefore, with the above configuration, the call connection operation can be continued, and the probability of successful call connection can be increased.

The present invention also provides a wireless communication connection request signal from a wireless telephone terminal, transmitting the signal to a wireless telephone base station, and receiving a wireless communication connection response signal from the wireless telephone base station. A wireless telephone relay device for transmitting to a wireless telephone terminal, wherein a state of utilizing communication with the wireless telephone base station according to the content of a received wireless communication connection response signal from the wireless telephone base station. A control unit (wireless telephone base station analyzing unit) for transmitting a connection request signal for wireless communication to a wireless telephone base station other than the wireless telephone base station to enable simultaneous communication with a plurality of wireless telephone base stations. A wireless telephone relay device comprising: That is, the present invention is a wireless telephone relay device having a configuration in which a base station-side wireless unit is divided into a plurality of units and each of them is independently controlled so that radio waves with a plurality of wireless telephone base stations can be transmitted and received independently. Therefore, according to the above configuration, the detour operation of the wireless telephone base station can be performed every time a connection request is made from the wireless telephone terminal. Calls can be made simultaneously with stations.

Further, the present invention provides a wireless communication connection request signal from a wireless telephone terminal and transmission to a wireless telephone base station, and a wireless communication connection response signal from the wireless telephone base station and A wireless telephone relay device for transmitting to a wireless telephone terminal, wherein the analyzing unit (control unit) analyzes the content of the received wireless communication connection response signal from the wireless telephone base station (for example, the reason for rejecting link channel assignment rejection). Channel analysis unit) and whether or not to transmit a wireless communication connection request signal to a wireless telephone base station other than the wireless telephone base station based on the content analyzed by the analyzing unit (for example, the reason for rejection of link channel assignment rejection) And a determining unit (wireless telephone base station selection determining unit) for determining and determining the wireless telephone base station. That is, the present invention selects an analysis unit (control channel analysis unit) for analyzing the reason for rejection of link channel assignment rejection received from a wireless telephone base station, and selects another wireless telephone base station based on the content analyzed by the analysis unit. And a determining unit (wireless telephone base station selection determining unit) for determining whether to perform the determination. Therefore, according to the above configuration, when the wireless telephone terminal has been notified of the regulation or the like from the wireless telephone base station, the reconnection operation can not be performed when the call connection is performed.

The present invention also provides a wireless communication connection request signal from a wireless telephone terminal, transmitting the signal to a wireless telephone base station, and receiving a wireless communication connection response signal from the wireless telephone base station. A wireless telephone relay device for transmitting to a wireless telephone terminal, comprising a control unit (wireless telephone base station analysis unit) for randomly selecting a wireless telephone base station when there are a plurality of wireless telephone base stations capable of wireless communication. A wireless telephone relay device characterized in that: That is, when starting operation, the present invention measures the identification code and the reception electric field level of the surrounding radio telephone base stations, and sorts the identification codes of the radio telephone base stations in descending order of the reception electric field level of the radio telephone base station. And a control unit (wireless telephone base station analysis unit) for selecting a wireless telephone base station having the highest reception level obtained by a random number generated in the wireless telephone relay device, each of which transmits and receives radio waves. This is a wireless telephone relay device capable of distributing the load of the telephone base station. Therefore, according to the above configuration, even when a plurality of wireless telephone base stations are arranged in the same place, it is possible to prevent all wireless telephone relay apparatuses from selecting the same wireless telephone base station. Also, the present invention provides a wireless communication terminal which receives a wireless communication connection request signal from a wireless telephone terminal, transmits the signal to a wireless telephone base station, receives a wireless communication connection response signal from the wireless telephone base station, and A wireless telephone relay device that transmits to the wireless telephone relay device the content of a received wireless communication connection response signal from the wireless telephone base station (for example, the number of times of rejection of link channel assignment rejection); It is determined whether or not the stored content (for example, the number of times of rejection of link channel assignment rejection) has reached a desired reference value (for example, on the condition that the number of times has been reached within a unit time). A wireless telephone relay device including a determining unit (a traffic information analyzing unit and a wireless telephone base station analyzing unit) for determining whether to select another wireless radio base station. That is, according to the present invention, the number of times the link channel assignment rejection received from the wireless telephone base station stored in the storage unit is:
A wireless telephone relay device including a determination unit (a traffic data analysis unit and a wireless telephone base station analysis unit) that determines to switch another wireless telephone base station on condition that a certain number of times is reached within a unit time. Therefore, with the above configuration, the frequency of the switching operation to another wireless telephone base station can be adjusted.

The present invention also provides a wireless communication connection request signal from a wireless telephone terminal, transmitting the signal to a wireless telephone base station, and receiving a wireless communication connection response signal from the wireless telephone base station. A wireless telephone relay device for transmitting to a wireless telephone terminal, wherein the storage unit stores the content of a connection response signal of wireless communication from the wireless telephone base station (for example, the number of times a link channel assignment rejection was received). A call loss rate is calculated from the stored contents (for example, the number of times of rejection of link channel assignment rejection), and it is determined whether the calculated call loss rate has reached a desired reference value to select another radio wave base station. A wireless telephone relay device comprising: a determination unit (a traffic data analysis unit and a wireless telephone base station analysis unit) for determining whether or not to perform the determination. Also, the present invention provides a wireless communication terminal which receives a wireless communication connection request signal from a wireless telephone terminal, transmits the signal to a wireless telephone base station, receives a wireless communication connection response signal from the wireless telephone base station, and A wireless telephone relay device that transmits to a public telephone network or a wireless telephone base station traffic information (for example, a call loss rate or the number of link channel establishment requests, the number of connection failures due to the absence of a line, the connection success A storage unit for storing information such as the number of times) and an analysis unit (traffic data analysis unit) for analyzing the traffic volume of the radio telephone base station based on the traffic information stored in the storage unit. It is a wireless telephone relay device.

The present invention also provides a wireless communication connection request signal from a wireless telephone terminal and transmission to a wireless telephone base station. The wireless communication base station receives a wireless communication connection response signal from the wireless telephone base station. A wireless telephone relay device for transmitting to a wireless telephone terminal, the traffic information being obtained from a public communication network or a wireless telephone base station (for example, a call loss rate or the number of link channel establishment requests, the number of connection failures due to the line not being free) , A connection response signal from the wireless telephone base station, and the contents of the connection response signal (for example, link channel allocation) from the wireless telephone base station, the traffic information stored in the storage unit, and the connection response signal. And a analyzing unit (traffic data analyzing unit) for analyzing a traffic volume of the wireless telephone base station based on the content of the wireless telephone base station. . The present invention also relates to the wireless telephone relay device, wherein the traffic amount of the wireless telephone base station analyzed by the analyzing unit (for example, the call loss rate or the number of link channel establishment requests, the number of connection failures due to the line not being free). , The number of successful connections, etc.) is determined by determining whether or not to select another radio telephone base station (radio telephone base station analysis unit).
Also, the present invention provides the wireless telephone relay device, wherein the content of the connection response signal of the wireless communication from the wireless telephone base station is recognized for each time zone so that the traffic acquired from the public communication network or the wireless telephone base station is obtained. Information (for example,
It has a collection unit (traffic data collection unit) that collects information such as the call loss rate or the number of link channel establishment requests, the number of connection failures due to the line not being available, and the number of connection successes.

That is, according to the present invention, in the radio telephone relay apparatus, in order to determine statistical radio line busy, traffic information (call loss rate or link loss per unit time) per unit time for a notification request from a selected radio telephone base station. Information on the number of channel establishment requests, the number of connection failures due to the line not being available, the number of connection successes, etc.) and calculate the call loss rate from the received traffic information per unit time,
In a time zone with a high call loss rate, transmission / reception of radio waves of the radio telephone base station selected so far is stopped, and a radio telephone base station other than the radio telephone base station is selected.
Therefore, with the above configuration, a radio telephone base station having a low call loss rate can be selected in advance, and the probability of successful call connection can be increased. Further, the present invention constitutes a system in which the wireless telephone relay device can obtain a call loss rate,
It is an object of the present invention to construct a system capable of recognizing a signal for transmitting and receiving traffic information between a wireless telephone base station and a wireless telephone relay device.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wireless telephone relay device according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing one embodiment of a wireless telephone relay device according to the present invention. The wireless telephone relay device according to the present invention includes DUPLEXERs 1 and 5 for separating transmission data and reception data for each radio wave of the radio telephone base station and the radio telephone terminal, and a terminal-side radio unit 2 for transmitting and receiving radio waves. And a base station-side radio unit 4 (a divided radio unit 1-4a that enables a call simultaneously with a plurality of radio base stations,
It has a wireless unit 2-4b and a wireless unit 3-4c. )When,
A CHANNEL CODEC (having both functions of an encoder and a decoder) 3 having a function of fetching received data and setting transmission data is provided with a part for transmitting and receiving radio waves. DUPLEXER 1 and 5
Are connected to the antennas 8a and 8b. The wireless telephone relay device according to the present invention further comprises a CHANNEL C
A memory unit 6 connected to the ODEC 3 and the CPU 7 and having a traffic information storage unit 6a, a wireless telephone base station data storage unit 6b, and a parameter storage unit 6c; a terminal side wireless unit 2, a base station side wireless unit 4, and a CHANNEL COD
A radio telephone base station analyzing unit 7A which is connected to the EC 3 and the memory unit 6 and functionally analyzes the identification code (ID) of the radio telephone base station, and a traffic data collecting unit 7B which collects traffic data from the radio telephone base station. And a traffic data analysis unit 7C for analyzing traffic data and analyzing whether to switch the wireless telephone base station. The radio telephone base station analyzing section 7A is functionally composed of a radio telephone base station searching section 7Aa and a control channel analyzing section 7Ab.
, Random number generator 7Ac, and radio telephone base station selection determiner 7Ad
It is composed of The traffic data collection unit 7B functionally includes a message creation unit 7Ba and a traffic collection call control unit 7Bb. Traffic data analyzer 7
C is functionally composed of a traffic volume calculation unit 7Ca, a traffic information analysis unit 7Cb, and a traffic collection time determination unit 7Cc.

FIG. 3 shows a system configuration including a radio telephone repeater RP201 according to the present invention. PS101-
PS 104 is a wireless telephone terminal, RP 201 is a wireless telephone relay device according to the present invention, and CS 301 to CS 302 are wireless telephone base stations. Wireless telephone terminals PS101 to PS102
Transmits and receives radio waves from the radio telephone relay device RP201, and the radio telephone relay device RP201
1 is transmitted and received by the base station side radio section 4. The radio telephone base station CS301 includes radio telephone terminals PS102 to P102.
Communication is being performed in S104, and a new call is not accepted in the wireless line busy state. The wireless telephone relay device RP201 establishes a call with the wireless telephone terminal PS102 using the base station side wireless unit 4a. It is assumed that the radio telephone base station CS302 has an empty line and is in a state where it can accept a new call. In carrying out the present invention, it is assumed that the radio telephone relay device RP201 stores all the surrounding radio telephone base stations in the radio telephone base station data storage unit 6b of the memory unit 6 when the power is turned on.

FIG. 4 is a sequence diagram in the system configuration example of FIG. When the wireless telephone terminal PS101 makes a call, a link channel establishment request (connection request signal) (SQ1) is transmitted to the wireless telephone relay device RP201.
In the radio telephone relay device RP201, CHANNEL
CODEC3 is an antenna 8a, DUPLEXER
1 and the terminal-side wireless unit 2 for the wireless telephone terminal PS10.
1 receives a link channel establishment request (SQ1) from
Based on the received link channel establishment request (SQ1), a link channel establishment request (SQ2) is transmitted to the radio telephone base station CS301 using the base station side radio section 4b, DUPLEXER 5, and antenna 8b. Since the wireless telephone base station CS301 does not have an idle line, the wireless telephone base station CS301 rejects the link channel allocation as a link channel establishment response (connection response signal) (S
Q3) (Rejection reason = All slots in use) are transmitted.

In the radio telephone repeater RP201, C
HANDEL CODEC3 is an antenna 8b, DUP
The LEXER 5 and the base station side radio section 2-4b receive a link channel establishment response (connection response signal) from the radio telephone base station CS301 and transmit it to the CPU 7, and the control channel analysis section 7Ab of the radio telephone base station analysis section 7A After analyzing that the received message is a rejection of link channel assignment, the memory unit 6 previously stores the call between the wireless telephone base station CS301 and the wireless telephone terminal PS102 using the base station side wireless unit 1-4a. Among the radio telephone base stations stored in the radio telephone base station data storage unit 6b, for example, the control channel search of the radio telephone base station CS302 is performed by the radio telephone base station search unit 7 of the radio telephone base station analysis unit 7A.
Aa (SQ4), the broadcast content transmitted on the control channel of the radio telephone base station CS302 is transmitted to the antenna 8
b, DUPLEXER 5, radio section 2-4b, and CH
The signal is received via the ANNEL CODEC 3 and analyzed by the control channel analysis unit 7Ab, and the radio telephone base station selection determination unit 7Ad determines whether a call connection is possible (SQ5). The determination as to whether the call connection is possible in the wireless telephone base station selection determining unit 7Ad of the wireless telephone base station analyzing unit 7A takes in information broadcast by the wireless telephone base station from the control channel analyzing unit 7Ab and does not regulate the call. It is a judgment of whether or not.

There is no problem of regulation or the like. For example, as a result of analysis by the control channel analysis unit 7Ab of the radio telephone base station analysis unit 7A, if the rejection reason included in the link channel allocation rejection is a busy reason such as all slots being used, etc. For example, the radio telephone relay device RP201 sets the timing setting of the control channel of the radio telephone base station CS302 stored in the radio telephone base station data storage unit 6b in the CHANNEL CODEC.
After performing in step 3, the base station side radio section 2-4b transmits a link channel establishment request (SQ6). That is, the radio telephone relay device RP201 analyzes the link channel establishment response (connection response signal) (SQ3) from the radio telephone base station CS301 by the control channel analysis unit 7Ab of the radio telephone base station analysis unit 7A, and Wireless telephone base station search section 7A
a, a link channel establishment request (connection request signal) (SQ6) to the wireless telephone base station CS302 other than the wireless telephone base station CS301 that has received the connection response signal in the control channel analyzing unit 7Ab and the wireless telephone base station selection determining unit 7Ad. It is determined whether to transmit. The radiotelephone base station CS302
Since a new call can be accepted, a link channel assignment is transmitted to the radio telephone relay device RP201 (S
Q7). In the wireless telephone relay device RP201, CHA
The NNEL CODEC 3 is an antenna 8b, DUPLE
When the link channel response is received by the XER5 and the radio unit 2-4b and analyzed by the control channel analysis unit 7Ab as link channel assignment (OK), CHANNEL
CODEC3, wireless unit 2-4b, DUPLEXER1,
Then, a link channel assignment is transmitted to the wireless telephone terminal PS101 via the antenna 8a (SQ8), a communication channel is connected (SQ9), and a call can be made.

As described above, as shown in FIG. 3, the wireless telephone terminal PS1 via the wireless telephone relay device RP201
01 and the radio telephone base station CS301 in the communication, a request to establish a link channel (S
When the wireless telephone relay device RP201 receives Q1), the wireless telephone relay device RP201 transmits a link channel establishment request (SQ2) to the wireless telephone device CS301, and receives a link channel assignment rejection from the wireless telephone base station CS301. The wireless telephone relay device RP201 does not transmit the link channel rejection to the wireless telephone terminal PS101,
The link channel establishment request (SQ6) is transmitted to the radio telephone base station C.
In step S302, the radio telephone base station CS302 transmits a link channel assignment (SQ7) to the radio telephone relay device RP201 because the new call can be accepted. When the link channel allocation (OK) is analyzed in 7Ab, the link channel allocation is transmitted to the wireless telephone terminal PS101 (SQ8), and the communication channel is connected (SQ9).
Can make a call, and as a result, the wireless telephone relay device R
P201 does not transmit the link channel assignment rejection (SQ3) from the radio telephone base station CS301 to the radio telephone terminal PS101, and the radio telephone relay device RP201 transmits a link channel establishment request to the radio telephone base station CS302, and By increasing the connection success rate, it is possible to prevent the wireless telephone terminal PS101 from failing in call connection.

Further, the wireless telephone terminal PS101 has already been connected to the wireless telephone base station CS via the wireless telephone relay device RP201.
When a telephone call is made to the wireless telephone relay device RP
201, there is a link channel establishment request (SQ1) from another wireless telephone terminal PS102, and the wireless telephone relay device RP
Even when 201 receives a link channel assignment rejection (SQ3) from the wireless telephone base station CS301, the wireless telephone relay device RP201 does not transmit a link channel assignment rejection to the wireless telephone terminal PS102, and issues a link channel establishment request (S
Q6) to the radiotelephone base station CS302, and since the radiotelephone base station CS302 is ready to accept a new call, it transmits a link channel assignment (SQ7) to the radiotelephone relay apparatus RP201 to perform radiotelephone relay. Device RP20
When the control channel analysis unit 7Ab analyzes the link channel assignment (OK), it transmits the link channel assignment to the wireless telephone terminal PS102 (SQ8), connects the communication channel (SQ9), and makes a call. As a result, the radio telephone relay device RP201 can make a call simultaneously with the two radio telephone base stations CS301 and CS302. In particular, in the radio telephone relay device RP201, the base station side radio unit 4 is connected to a plurality of radio units 1 to 3 (4a to 4a).
4c), and the plurality of divided wireless units 1 to 3 (4
a) to 4c) are independently controlled by the CPU 7 (particularly, the radio telephone base station analysis unit 7A), thereby enabling simultaneous telephone calls with a plurality of radio telephone base stations.

Next, the radio telephone relay device RP according to the present invention
The radio telephone base stations 201 and RP 204 are distributed to the radio telephone base station CS 301, the radio telephone relay devices RP 202 and RP 205 are distributed to the radio telephone base station CS 302, and the radio telephone relay device RP 203 is distributed to the radio telephone base station CS 303. A system configuration for avoiding the concentration of all the radio telephone relay devices RP201 to RP205 in one radio telephone base station and distributing the traffic load will be described with reference to FIG. RP201 to RP205 are wireless telephone relay devices, and CS301 to CS303 are wireless telephone base stations. From the wireless telephone relay device RP201 to RP2
Numeral 05 is installed at the window of each floor of the building, and the building is an area from CS301 to CS303. In addition, CS301, CS302, CS30 are arranged in order from the radio telephone base station having the highest reception level from each radio telephone repeater.
3 is assumed.

Next, according to the present invention, when a plurality of wireless telephone base stations are present in a communication area, a wireless telephone relay apparatus capable of selecting a wireless telephone base station at random is shown in FIG. Will be described with reference to FIG. Wireless telephone relay devices RP201 to RP205
CPU 7 receives information such as the identification code (ID) of the surrounding wireless telephone base stations CS301 to CS303 and the received electric field level when the power is turned on and when the apparatus is reset, and the wireless telephone base station of the wireless telephone base station analyzing unit 7A. It is acquired by the search unit 7Aa (step SD1). Further, when the acquisition of the peripheral radio telephone base stations is completed, the CPU 7 of the radio telephone relay devices RP201 to RP205 stores information such as the identification code (ID) of the radio telephone base station that can be selected and the reception level in the memory unit 6. (Step SD2) and the number of selectable radiotelephone base stations are also stored (step SD3). further,
CPU 7 of wireless telephone relay devices RP201 to RP205
Is stored in the radio telephone base station data storage unit 6b in the radio telephone base station selection determination unit 7Ad of the radio telephone base station analysis unit 7A.
Are sorted by the identification code (ID) of the radio telephone base station that can be selected in the descending order of the radio telephone base station level (step SD4). In the system configuration of FIG.
CS302 and CS303 are arranged in this order. That is,
In the radio telephone base station selection determining unit 7Ad of the radio telephone base station analyzing unit 7A, in order to determine the radio base station to select,
The random number generator 7Ac generates a random number. The random number generation method uses the unique numbers of the wireless telephone relay devices RP201 to RP205 and the number of selectable wireless telephone base stations. An example of a method for generating a random number will be described. A random number is generated from a unique value possessed by the wireless telephone relay device, for example, the last digit of a calling identification code or a serial number, and the number of wireless telephone base stations searched by the wireless telephone base station searching unit 7Aa. As an example of calculation, it can be generated by the formula ((the last digit of the calling identification code) MOD (the number of searches for the wireless telephone base station)) + 1 (step SD5).

As shown in FIG. 5, the radio telephone base station actually selected by the radio telephone repeater is a radio telephone repeater RP.
The random numbers generated by the RP 205 from 201 are respectively 1,
Assuming that 2, 3, 1, and 2, the radio telephone relay devices RP201 and RP204 select the radio telephone base station CS301, and the radio telephone relay devices RP202 and RP205 select the radio telephone base station C.
Since the wireless telephone relay device RP203 does not select a specific wireless telephone base station from the wireless telephone relay devices RP201, such as selecting S302 and selecting the wireless telephone base station CS303, traffic load can be distributed. . Next, the traffic data obtained from the public communication network or the radio telephone base station according to the present invention, the traffic data collected in the radio telephone relay device, without selecting a radio telephone base station having a high call loss rate and a lower call loss rate. FIG. 5 shows a wireless telephone relay device for selecting a wireless telephone base station.
The processing flow in the example system configuration will be described with reference to FIG. Each of the wireless telephone relay devices RP201 to RP205 stores the contents of a connection response signal (link channel establishment response) from a desired wireless telephone base station in response to a connection request signal (link channel establishment request) from a wireless telephone terminal, The stored contents are processed to determine whether to select another wireless telephone base station.

That is, the radio telephone relay devices RP201 to RP201
In each of the mobile telephones 205, the CPU 7
Antenna 8a, DUP from any of 101 to PS102
LEXER1, terminal-side radio unit 2, and CHANNEL
When a link channel establishment request is received via the CODEC 3 (step SD10), the number of link channel establishment request receptions of the traffic information storage unit 6a of the memory unit 6 is incremented (step SD11), and the number of the radio telephone base stations CS301 to CS303 is increased. A link channel establishment request is transmitted from the CHANNEL CODEC 3, the base station side radio unit 4, the DUPLEXER 5, and the antenna 8b to a desired radio telephone base station (step SD12). When the control channel analysis unit 7Ab of the wireless telephone base station analyzing unit 7A analyzes that the link channel assignment rejection has been received from the desired wireless telephone base station (step SD13), the CPU 7
The link channel assignment rejection reception count of the traffic information storage unit 6a of the memory unit 6 is incremented (step SD1).
4) Yes. At this time, the traffic volume calculation unit 7Ca of the traffic data analysis unit 7C calculates the call loss rate α from the number of times of reception of link channel allocation rejection / the number of times of reception of link channel establishment request (the number of times of reception of link channel establishment request incremented in the traffic information storage unit 6a). (Step S
D15), the traffic information analysis unit 7Cb compares the call loss rate α obtained by the traffic volume calculation unit 7Ca with a threshold value set in the parameter holding unit 6c of the memory unit 6 (step SD16). If the traffic information analysis unit 7Cb of the traffic data analysis unit 7C does not exceed the threshold value, the link channel rejection is transmitted to the wireless telephone terminal that has made the link channel establishment request (step SD17), and the processing ends.

If the traffic information analyzer 7Cb of the traffic data analyzer 7C exceeds the threshold,
Radio telephone base station selection determining unit 7 of radio telephone base station analyzing unit 7
At Ad, the CPU 7 enters a capturing operation (steps SD18 to SD21) of a wireless telephone base station different from the desired wireless telephone base station. After capturing, the CPU 7 transmits a link channel establishment request (step SD22), and a call connection operation (step SD22). Step SD22
To SD25). The capturing operation of another radio telephone base station (steps SD18 to SD21) is specifically performed as follows. That is, the wireless telephone base station selected by the wireless telephone base station selection determining unit 7Ad of the wireless telephone base station analyzing unit 7A in the CPU 7 is stored in the wireless telephone base station data storage unit 6b of the memory unit 6 in the wireless telephone base station search unit 7Aa. The stored control channel of the stored base station is searched (step SD18: SQ4). If no base station is found in step SD19, the process returns to step SD18. If a base station is found in step SD19, control channel analysis is performed. The unit 7Ab analyzes whether the base station satisfies the selection condition (step SD20: SQ
5) If not, the process returns to step SD18, and if so, the CPU 7 starts receiving the control channel from the wireless telephone base station. The call connection operation (steps SD22 to SD25) is specifically performed as follows. That is, the CPU 7 assigns a link channel (step SD23: SQ) from the wireless telephone base station that has transmitted the link channel establishment request (step SD22: SQ6).
7), a link channel assignment (step SD24: SQ8) is transmitted to the wireless telephone terminal, a communication channel is connected (step SD25: SQ9), and a call can be made. The device can select a radio telephone base station with a lower call blocking rate.

Next, traffic information obtained from the public communication network or the radio telephone base station according to the present invention is stored, and the traffic amount of the radio telephone base station is analyzed using the stored traffic information. FIG. 8 and FIG. 9 show a wireless telephone relay device that determines whether or not to select another wireless telephone base station based on the result of the traffic volume of the wireless telephone base station thus selected and selects a wireless telephone base station with a lower call blocking rate. This will be described with reference to FIG.

That is, in the wireless telephone relay device, the traffic collection time determination unit 7C of the traffic data analysis unit 7C
c, when it is determined that the traffic collection time is reached, a message for call connection is created by the message creation unit 7Ba of the traffic data collection unit 7B, and the traffic collection call control unit 7B
At b, a link channel establishment request is autonomously transmitted to the currently selected wireless telephone base station, regardless of the wireless telephone terminal (SQ10). The wireless telephone base station which has received this transmits a link channel assignment (SQ11), and connects a communication channel between the wireless telephone relay device and the wireless telephone base station (SQ12: step SD30). In the communication channel, the wireless telephone relay device transmits the traffic information request created by the message creating unit 7Ba to the wireless telephone base station by the traffic collection call control unit 7Bb (SQ13:
Step SD31). The wireless telephone base station transmits traffic information such as a call loss rate in a time zone in which the traffic information request is received, in a traffic information report (SQ14).
Upon receiving the traffic information report in the traffic collection call control unit 7Bb (SD32), the wireless telephone relay device stores the received traffic information in the traffic information storage unit 6a of the memory unit 6, disconnects the communication channel, Release the call (SQ15).

In the CPU 7 of the wireless telephone relay device that has received the traffic information, the traffic data analysis unit 7
The call loss rate α indicating that the line could not be connected from the traffic information report (traffic information report such as the call loss rate in the time zone when the traffic information request was received) stored in the traffic information storage unit 6a of the memory unit 6 by the traffic amount calculation unit 7Ca of C = (Number of connection failures / number of connection attempts) (step SD33), and the call loss rate α calculated by the traffic amount calculation unit 7Ca by the traffic information analysis unit 7Cb.
Is compared with the threshold value set in the parameter holding unit 6c of the memory unit 6 (step SD34). If the call loss rate α is smaller than the threshold value, the process ends without switching the wireless telephone base station. If the call loss rate α is larger than the threshold value, the wireless telephone base station selected by the wireless telephone base station selection determining unit 7Ad of the wireless telephone base station analyzing unit 7A is used by the wireless telephone base station searching unit 7Aa. Station data storage unit 6b
A search is performed based on the data stored in the base station (step SD35). If the wireless telephone base station is present in the control channel analysis unit 7Ab (step SD36) and the wireless telephone base station can be selected. BA (Step SD3
7), the CPU 7 starts reception of the control channel (step SD38), transmits a traffic information request to the wireless telephone base station (step SD31), and a call loss rate α based on a traffic information report from the wireless telephone base station (step SD32). And the operation of determining the threshold value is repeated.
If the call loss rates α of all the radio telephone base stations are higher than the threshold value, the CPU 7 selects the radio telephone base station having the lowest call loss rate among the looped radio telephone base stations (step SD40), and The control channel reception of the station is started (step SD41). The content of the traffic information report transmitted by the wireless telephone base station may be the number of times a link channel establishment request has been received and the number of times a link channel assignment rejection has been transmitted. In this case, the call loss rate is calculated by the traffic volume calculation unit 7Ca of the wireless telephone relay device. The call blocking rate α can be calculated by the formula (number of rejected link channel assignments / number of received link channel establishment requests).

As described above, in the wireless telephone relay device according to the present invention, the traffic information obtained from the public communication network or the wireless telephone base station is stored in the traffic information storage unit 6.
a, and the traffic amount of the wireless telephone base station is analyzed by the traffic data analysis unit 7C using the stored traffic information, and another traffic amount is analyzed based on the analyzed result of the traffic amount of the wireless telephone base station. By configuring the radio telephone base station analyzer 7A to determine whether to select a radio telephone base station, it is possible to select a radio telephone base station with a lower call loss rate. In the traffic data collection unit 7B of the wireless telephone relay device according to the present invention, the acquisition of the traffic information from the public communication network or the wireless telephone base station is performed by dividing the content of the connection response signal from the wireless telephone base station for each time zone. By configuring so as to be recognizable, it becomes possible to select a radio telephone base station having a lower call blocking rate.

FIG. 2 shows a connection form of a general simplified form telephone. That is, the radiotelephone base stations CS301 to CS301
CS 303 is accommodated in network 601 and communication areas 501 to 501 are connected.
503 are formed. Furthermore, the radio telephone relay device RP2
01 to RP202 are arranged in the communication area of the radio telephone base stations CS301 to CS303 to form the communication areas 401 to 402 in order to eliminate the dead zone. The wireless telephone terminals PS101 to PS102 are in the communication area 4
01, and receives radio waves from the wireless telephone relay device RP201. Here, assuming that the call area 501 has a high traffic and the call area 502 has a low traffic, the area 501 has a high probability of a line not being free and thus has a high blocking loss rate. The call loss rate is a probability that a line connection cannot be made, and can be calculated by (number of connection failures / number of connection attempts). On the other hand, the call loss rate is low in the area 502 because the traffic is low.

According to the above-described embodiment of the present invention, the following effects can be obtained even in the general form of connection of the simplified type telephone shown in FIG. According to the present embodiment, radio telephone relay apparatus RP201 does not transmit a link channel rejection from radio telephone base station CS301 to radio telephone terminal PS101, and radio telephone relay apparatus RP201 transmits a link channel to radio telephone base station CS302. By transmitting the probability request and increasing the connection success rate of the wireless communication channel, it is possible to prevent the wireless telephone terminal PS101 from failing in connection. That is, when the wireless relay device receives a link channel assignment rejection message indicating connection rejection from the wireless telephone base station,
Judge whether to reconnect and select a wireless telephone base station other than the rejected wireless telephone base station to transmit a link channel establishment request to the selected wireless telephone base station and increase the probability of successful call connection. can do. Further, according to the present embodiment, by dividing base station side radio section 4 and controlling each of them independently, radio telephone relay apparatus RP201 has 2
A call can be made simultaneously with the two radio telephone base stations CS301 and CS302. That is, in the wireless telephone relay device, the base station side wireless section 4 is divided and each is independently controlled by the CPU 7, thereby transmitting and receiving radio waves of a plurality of wireless telephone base stations.

Further, according to the present embodiment, the radio telephone repeater RP201 distributes and selects the radio telephone base station, such as the radio telephone base station CS301, and the radio telephone repeater RP202, the radio telephone base station CS303. So 1
It is possible to avoid concentration of all the wireless telephone relay devices on one wireless telephone base station, and to achieve traffic load distribution. That is, the logic of the radio telephone relay device selecting the radio telephone base station is sorted in the order of the level of the radio wave received by the radio telephone relay device from the radio telephone base station, and the value obtained by the random number generated in the radio telephone relay device is sorted. By selecting the wireless telephone base station, the traffic load can be distributed. Further, according to the present embodiment, the traffic data acquired from the public communication network or the radio telephone base station, and the traffic data collected in the radio telephone relay device can be used to select the radio telephone base station having a high call loss rate without causing the call loss rate to be high. Can be selected. That is, the wireless telephone relay device collects traffic data such as the call loss rate or the number of times a link channel establishment request has been received and the number of successful call connections from the wireless telephone base station in the traffic data collection unit 7B, and the traffic data analysis unit 7C and the wireless telephone base station. The station analysis unit 7A determines whether the base station is a radio telephone base station having a low call loss rate, and if the call loss rate is lower than a predetermined condition, selects the radio telephone base station. Can be increased.

[0034]

According to the present invention, it is possible to avoid a connection failure due to a radio line busy of a radio telephone base station and to realize a radio telephone relay device capable of increasing a connection success rate. . Further, according to the present invention, it is possible to realize a wireless telephone relay device that can make a call at the same time as a plurality of wireless telephone base stations by dividing the base station side wireless units and independently controlling each of them. The effect that can be performed. Further, according to the present invention, it is possible to realize a wireless telephone relay device capable of distributing traffic load by randomly selecting a wireless telephone base station.
Further, according to the present invention, a wireless telephone base station having high traffic is avoided from the traffic data of the wireless telephone base station, the connection success rate is statistically increased, and a convenient service for the user of the wireless telephone terminal is provided. The effect which can provide is produced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a wireless telephone relay device according to the present invention.

FIG. 2 is a diagram showing a connection form of a general simplified cellular phone for explaining effects in the embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration example of a system showing an embodiment of the present invention.

FIG. 4 is a diagram showing a sequence in which the wireless telephone relay device according to the present invention switches and connects wireless wireless base stations.

FIG. 5 is a schematic diagram showing a configuration example of a system showing an embodiment of the present invention.

FIG. 6 is a diagram showing a flowchart for selecting a radio telephone base station by the radio telephone relay device according to the present invention.

FIG. 7 is a flowchart showing a procedure for switching a wireless telephone base station based on a call blocking rate in the wireless telephone relay device according to the present invention.

FIG. 8 is a sequence diagram for collecting traffic in the wireless telephone relay device according to the present invention.

FIG. 9 is a flowchart showing a procedure for switching a wireless telephone base station based on traffic collection and a call loss rate in the wireless telephone relay device according to the present invention.

[Explanation of symbols]

1, 5: DUPLEXER, 2: Terminal side radio section, 3: C
HANDEL CODEC, 4 ... Base station side radio section, 4a
... Radio units 1, 4b Radio units 2, 4c Radio units 3, 6 Memory unit, 6a Traffic information storage unit, 6b Radio telephone base station data storage unit, 6c Parameter storage unit, 7 C
PU, 7A: wireless telephone base station analyzing unit, 7Aa: wireless telephone base station searching unit, 7Ab: control channel analyzing unit, 7Ac ...
Radio telephone base station selection determining unit, 7B traffic data collecting unit, 7Ba message creating unit, 7Bb traffic collecting call control unit, 7C traffic data analyzing unit, 7Ca
... Traffic amount calculation unit, 7Cb ... Traffic information analysis unit, 7Cc ... Traffic collection time determination unit, 8a, 8b ...
Antenna, RPS101 to PS104 ... wireless telephone terminal,
RP201 to RP205: wireless telephone relay device, CS30
1 to CS303: a radio telephone base station; 401 to 405: a communication area of a radio telephone relay device; 501 to 503: a communication area of a radio telephone base station; 601: a public communication network.

Continued on the front page F term (reference) 5K067 AA12 AA25 BB04 DD11 DD23 DD24 DD57 EE02 EE06 EE10 FF02 GG01 HH21 HH22 HH23 JJ12 JJ51 JJ54 JJ71 JJ72 JJ73 KK15 5K072 AA12 AA15 BB14 BB13 BB14

Claims (10)

[Claims] 1. A wireless communication connection request signal from a wireless telephone terminal is received and transmitted to a wireless telephone base station, and a wireless communication connection response signal from the wireless telephone base station is received and transmitted to the wireless telephone terminal. A wireless telephone relay device, which does not transmit the wireless communication connection response signal to the wireless telephone terminal according to the content of the received wireless communication connection response signal from the wireless telephone base station. A wireless telephone relay device comprising a control unit for transmitting a wireless communication connection request signal to a wireless telephone base station other than the telephone base station. 2. A wireless communication terminal receives a wireless communication connection request signal from the wireless telephone terminal and transmits the signal to the wireless telephone base station, and receives a wireless communication connection response signal from the wireless telephone base station and sends the wireless communication connection response signal to the wireless telephone terminal. A wireless telephone relay device for transmitting, wherein, in accordance with the content of a received connection response signal of wireless communication from the wireless telephone base station, the wireless A wireless telephone relay device comprising: a control unit that transmits a connection request signal for wireless communication to a wireless telephone base station other than the telephone base station and enables simultaneous communication with a plurality of wireless telephone base stations. 3. A wireless communication connection request signal from the wireless telephone terminal is received and transmitted to the wireless telephone base station, and a wireless communication connection response signal from the wireless telephone base station is received to the wireless telephone terminal. A wireless telephone relay device for transmitting, comprising: an analyzing unit for analyzing the content of a received wireless communication connection response signal from the wireless telephone base station; and an analyzing unit other than the wireless telephone base station based on the content analyzed by the analyzing unit. And a determining unit for determining whether to transmit a connection request signal for wireless communication to the wireless telephone base station. 4. A wireless communication terminal receives a wireless communication connection request signal from the wireless telephone base station and transmits the signal to the wireless telephone base station, and receives a wireless communication connection response signal from the wireless telephone base station to the wireless telephone terminal. A wireless telephone relay device for transmitting, comprising: a control unit for randomly selecting a wireless telephone base station when there are a plurality of wireless telephone base stations capable of wireless communication. 5. A wireless communication connection request signal from a wireless telephone terminal is received and transmitted to a wireless telephone base station, and a wireless communication connection response signal from the wireless telephone base station is received and sent to the wireless telephone terminal. A wireless telephone relay device for transmitting, comprising: a storage unit for storing the content of the received wireless communication connection response signal from the wireless telephone base station; and the content stored in the storage unit reaching a desired reference value. And a determining unit for determining whether or not another wireless radio base station is to be selected. 6. A wireless communication connection request signal from a wireless telephone terminal is received and transmitted to a wireless telephone base station, and a wireless communication connection response signal from the wireless telephone base station is received and transmitted to the wireless telephone terminal. A wireless telephone relay device for transmitting, wherein a storage unit that stores the content of the received wireless communication connection response signal from the wireless telephone base station, and a call loss rate calculated from the content stored in the storage unit. A determination unit for determining whether the calculated call blocking rate has reached a desired reference value and determining whether to select another wireless radio base station or not. 7. A wireless communication terminal receives a wireless communication connection request signal from a wireless telephone terminal, transmits the signal to a wireless telephone base station, receives a wireless communication connection response signal from the wireless telephone base station, and sends the wireless communication connection response signal to the wireless telephone terminal. A wireless telephone relay device for transmitting, comprising: a storage unit for receiving and storing traffic information obtained from a public communication network or a wireless telephone base station; and a wireless telephone base station based on the traffic information stored in the storage unit. And a analyzing unit for analyzing the traffic volume of the wireless telephone. 8. A wireless communication terminal receives a wireless communication connection request signal from the wireless telephone terminal and transmits the signal to the wireless telephone base station. The wireless communication base station receives a wireless communication connection response signal from the wireless telephone base station and sends the wireless communication connection response signal to the wireless telephone terminal. A wireless telephone relay device for transmitting, comprising: a storage unit that receives and stores traffic information obtained from a public communication network or a wireless telephone base station and the content of a connection response signal from the wireless telephone base station; A wireless telephone relay device comprising: an analysis unit configured to analyze a traffic amount of the wireless telephone base station based on traffic information stored in the unit and the content of the connection response signal. 9. The wireless telephone relay device according to claim 7, further comprising determining whether to select another wireless telephone base station according to the traffic volume of the wireless telephone base station analyzed by the analyzing unit. A wireless telephone relay device, comprising: a determining unit that determines the value. 10. The public telephone network or the radio telephone base station according to claim 7, wherein the contents of the radio communication connection response signal from the radio telephone base station are recognized for each time zone. A wireless telephone relay device comprising a collection unit for collecting traffic information acquired from a telephone.