JP3382783B2 - Mobile communication channel switching control system and mobile communication channel switching control method - Google Patents

Mobile communication channel switching control system and mobile communication channel switching control method

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Publication number
JP3382783B2
JP3382783B2 JP18248296A JP18248296A JP3382783B2 JP 3382783 B2 JP3382783 B2 JP 3382783B2 JP 18248296 A JP18248296 A JP 18248296A JP 18248296 A JP18248296 A JP 18248296A JP 3382783 B2 JP3382783 B2 JP 3382783B2
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Japan
Prior art keywords
base station
station
reception level
mobile
communication
Prior art date
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Application number
JP18248296A
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Japanese (ja)
Other versions
JPH1028281A (en
Inventor
宏 小林
正勝 山崎
理 渡邊
正美 笹木
健志 船越
Original Assignee
株式会社エヌ・ティ・ティ・ドコモ
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Publication of JPH1028281A publication Critical patent/JPH1028281A/en
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Publication of JP3382783B2 publication Critical patent/JP3382783B2/en
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Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
, Mobile communication systems such as mobile phones and simplified mobile phones
And a mobile communication channel switching control system suitable for
With respect to a mobile communication channel switching control method,
Switch off the communication channel (communication base station) according to the movement of the mobile station
When performing switching, the message "Receiving level between mobile station and each base station"
Bell '' and the location of the base station currently in communication and its surroundings
Distance between neighboring base stations
By switching, the optimal base station is always
Mobile communication channel that can be selected as a switching destination of the channel
Control system and mobile communication channel switching control method
About. [0002] 2. Description of the Related Art Conventionally, automobile telephone systems and mobile telephone systems have been developed.
Systems, mobile communication systems such as simplified mobile phone systems
In, it is necessary to arrange multiple base stations at predetermined intervals.
As shown in FIG. 7, a plurality of service areas (wireless
Communication service in this
Swelling. And call between these service areas
When the mobile station inside (mobile phone etc.) moves, the control station
Establishes a communication channel with a base station that satisfies the predetermined switching conditions.
By switching, the call is continued
You. [0003] Specifically, for example, the "digital mobile communication method"
In the communication system of the formula,
Mobile station detects reception level of transmission information from each base station
I do. Then, if the reception level of this transmission information is the highest,
Select a local station and start communication. Next, the selected base station (communication base station)
Bureau), for example, as shown in FIG.
If it is a rear SAD, the mobile station
The service area SAL adjacent to the rear SAD (in the figure,
It is shown as a diagonally left hexagon. ) Forming base stations (neighboring bases)
Station) and the service area adjacent to the adjacent service area SAL.
Service area SAJ (shown in the figure as a hatched hexagon
You. ), The level of reception of transmission information from neighboring base stations
And sends them to the control station via the communication base station.
I do. Next, the mobile station moves from the communication base station by moving.
If the reception level of the transmission information of has become low, or
The reception level of transmission information from other neighboring base stations is high.
Communication with the control station via the communication base station.
Request for replacement. [0006] The control station receives a communication switching request from the mobile station.
When this is done, each neighboring base station previously transmitted from the mobile station
Highest reception level based on reception level detection information
The base station to which the neighboring base station indicating the communication channel is switched
Detected as Then, the base station of this switching destination is indicated.
Move the switching destination base station information via the communication base station
Station and the call channel to this new base station.
Switch the channel. This allows the mobile station
You can switch communication base stations every time you move around the area.
Wear. [0007] Such a "digital mobile communication method"
Analog mobile communication method
Telecommunications systems are also known, in which case
The base station adjusts the reception level of the transmission information from the mobile station.
Detect and transmit to control station. The control station is connected to each of the peripheral bases.
Select the highest reception level from among the reception levels from the station.
To detect. And the surroundings that show this highest reception level
Select the base station as the base station to switch the traffic channel
To switch the communication channel. This allows
As in the “Digital Mobile Communication System”
Switching base stations every time you move
it can. [0008] Here, each of the base stations
The service area formed by is shown in FIG. 7 and FIG.
As shown in (a), the boundaries of each area are not clear
And complex in densely populated buildings such as urban areas
The current situation is that the service is
In areas where the seria is complicated
Is the service area that the mobile station is actually
Other service areas farther away than the reception level
May be higher. However, the conventional mobile communication system has a
Digital mobile communication system ”and“ analog mobile communication system ”
In any case, the control station is detected by the mobile station.
Reception level of transmission information from each base station
Receiving level of transmission information from mobile station formed by base station
Switch the call channel to the base station with the highest bell
As shown in FIG. 8C, the mobile station
The base station in the service area that the mobile is actually moving
As shown in FIG.
Call a base station in another service area as far away as possible
Channel switching is performed, resulting in the inconvenience of communication interruption.
There was a case. [0010] The present invention has been made in view of the above problems.
And the service area is complicated
Bases that are optimal for mobile stations
Select a station, switch the call channel to this, and
Mobile communication channel switching system that can be continued
Control system and a mobile communication channel switching control method.
Aim. [0011] SUMMARY OF THE INVENTION A mobile communication channel according to the present invention is provided.
Channel switching control system and mobile communication channel switching control
The method includes the steps of forming a wireless zone formed by a plurality of base stations.
When a mobile station that is talking on the move moves between
Switch the communication channel to a base station that meets the specified switching conditions
Mobile communication channel switching to maintain communication
Control system and mobile communication channel switching control method
You. In order to solve the above-mentioned problems, the following characteristic
It has various means. That is,The first feature of the present invention is thatThe transfer
It is provided on the mobile station side and is located near the communication base station that is currently communicating.
Reception level of transmission information transmitted from neighboring base stations
Receiving level detecting means for detecting and transmitting
Provided on the control station side and transmitted from the reception level detection means.
Reception level of each neighboring base station, and
Based on the distance between the communication base station and each of the surrounding base stations.
To select the most suitable base station and communicate with this selected base station.
Base station selecting means for switching a talk channel
Gist to be a mobile communication channel switching control system
Do. Specifically, the base station selecting means includes:
Weight according to the distance between the communication base station and each peripheral base station
Weighting coefficients are stored in advance and the reception level of each peripheral base station is
Each bell is weighted so that
Disconnect nearby base stations that have high reception levels
Select as the base station to be replaced. Also,A second feature of the present invention is thatThe mobile station
Is located in the vicinity of the currently communicating base station.
Each of the reception levels of the transmission information transmitted from the base station
Detecting, by the control station, the mobile station
The detected reception level of each peripheral base station detected and stored in advance
Distance between the communication base station and each peripheral base station
Select the best base station based on
Switching the communication channel to the station.
The gist is that this is a mobile communication channel switching control method.
To. More specifically, the control station sets a
When selecting the base station to be switched,
Depending on the distance between the communication base station and each of the surrounding base stations.
Using the weighting factors obtained, the reception level of each neighboring base station is adjusted.
Are weighted for each, so that the highest
Switch the communication channel to the peripheral base station that will be the communication level
Is selected as the base station for performing the above. Such a mobile communication channel switching control system
The mobile station and the mobile communication channel switching control method are based on the mobile station.
The control station detects the reception level of the transmission information from the
Distance between the communication base station and each surrounding base station.
System and method for weighting according to separation
is there. [0017] This makes it possible to reduce the strength of the temporary reception level.
Without being confused, choose the truly optimal base station
The communication channel can be switched to the base station. Next,A third feature of the present invention is thatEach base
A communication base station that is provided in the station and performs communication with the mobile station.
When this happens, the communication base station stored in advance and its
Sends distance information to the mobile station regarding the distance to the surrounding base station.
Transmitting distance information transmitting means, provided on the mobile station side,
Check the reception level of the transmission information transmitted from each peripheral base station.
Receiving level detecting means for detecting each of them. Also,
Provided on the mobile station side, and provided by the reception level detecting means.
The received level of each peripheral base station detected by
The communication base station transmitted from the communication base station and its surroundings
A form that reflects distance information about the distance to the base station
And transmit these to the control station as reception level detection information.
Receiving level transmitting means, provided on the control station side,
Checking each reception level transmitted from the reception level transmitting means
Outgoing information and find the optimal receiving level from among them
Select the information indicated by this optimal reception level detection information
Base station selector to switch the communication channel to the base station
With stepsMobile communication channel switching control system
Make it a gist. Specifically, the distance information transmitting means includes
Between the stored communication base station and its surrounding base stations
Mobile station using a weighting coefficient corresponding to the distance as the distance information
And the reception level transmitting means transmits the distance information and
The reception coefficient of each peripheral base station is
Weighting the received signal level, and
Outgoing information, and the base station selecting means selects the weighting
Out of the reception level detection information formed by
High reception level detection information is detected and this reception level detection
Switch the communication channel to the peripheral base station indicating the information.
Select as a nearby base station. Also,A fourth feature of the present invention is thatEach base
Of the stations, the communication base station performs communication with the mobile station.
The communication base station and the communication base station stored in advance
Sends distance information to the mobile station regarding the distance to the surrounding base station.
Transmitting from each of the neighboring base stations.
Detecting the reception level of the transmitted information
Then, each of the detected reception levels is transmitted from the communication base station.
Sent between the communication base station and its surrounding base stations
Reception level detection that reflects distance information related to distance
Transmitting to the control station as outgoing information. Ma
Further, the control station may select from among the respective reception level detection information
Select the optimal reception level detection information, and select this optimal reception level.
Switching the communication channel to the base station indicated by the bell detection information
Having a step of performingMobile communication channel switching control method
The gist of the law. Specifically, the communication base station stores in advance
Distance between the communication base station and the surrounding base station.
A weighting coefficient corresponding to the separation is provided to the mobile station as the distance information.
Transmitting, and the mobile station uses the weighting factor to
Weight the reception levels of the local base stations.
Forming the reception level detection information;
From the received level detection information formed by the
The highest reception level detection information is detected, and this reception level
Switch the surrounding base station showing the detection information to the communication channel
Is selected as a peripheral base station for performing the above. Such a mobile communication channel switching control system
The mobile station and the mobile communication channel switching control method are based on the mobile station.
Detects the reception level of transmission information from the local station, and
Distance between the communication base station and each surrounding base station.
A system for weighting according to the separation and transmitting to the control station; and
Is the way. [0023] This makes it possible to reduce the strength of the temporary reception level.
Without being confused, choose the truly optimal base station
The communication channel can be switched to the base station. Next,A fifth feature of the present invention is thatThe control station
The reception level of the transmission information transmitted from the mobile station
To detect each bell and return this detection information.
Is located around the base station currently communicating with the mobile station.
Level detection control to control each peripheral base station
Means, provided on the control station side, each peripheral base station
The received level detection information returned from the
The distance between the stored communication base station and each of the peripheral base stations.
Base station is selected based on the separation, and the selected base station is selected.
Base station selecting means for switching a communication channel to a base station;
HavingBe a mobile communication channel switching control system
Abstract. More specifically, the base station selecting means includes:
Between the stored communication base station and each peripheral base station
Reception of each surrounding base station by weighting coefficient according to distance
Each level of detection information is weighted and
This calls the surrounding base station with the highest reception level.
It is selected as a base station for switching channels. Further, a sixth feature of the present invention is that the control station
The reception level of the transmission information transmitted from the mobile station.
The base station currently communicating with the mobile station to detect
Controlling each peripheral base station located around the station
And the control station detects each of the peripheral base stations.
Detection information of the received reception level, and
Distance between the communication base station and each peripheral base station.
Select the best base station based on the selected base station
Switching the communication channel toTransfer
The point is that it is a mobile communication channel switching control method.. [0027] Specifically, the control station comprises a communication channel.
Is stored in advance when selecting the base station to be switched.
Depending on the distance between the communication base station and each neighboring base station.
Detected by each surrounding base station by the same weighting factor.
Weight for the detected information of each received level.
The surrounding base stations that have the highest reception level
Is selected as the base station that switches the communication channel.
You. Such a mobile communication channel switching control system
System and the mobile communication channel switching control method, each peripheral base
The station detects the reception level of the transmission information from the mobile station, and
The control station informs the detected reception level of this reception level.
Weighting according to the distance between the transmitting base station and each neighboring base station
System and method for performing [0029] Thus, the level of the temporary reception level can be reduced.
Without being confused, choose the truly optimal base station
The communication channel can be switched to the base station. Next,A seventh feature of the present invention is thatThe control station
The reception level of the transmission information transmitted from the mobile station
Currently communicating with mobile station to detect each bell
For controlling a peripheral base station located around a given communication base station.
Signal level detection control means, provided on the control station side, and
Between the stored communication base station and each of the peripheral base stations.
To each of the neighboring base stations
Distance information transmitting means. In addition, each base station side
Provided from a mobile station according to control by the control station.
Detects the reception level of the transmission information, and
The distance information transmitted from the distance information transmitting means.
And reflect it as reception level detection information.
Receiving level detecting means for transmitting to the control station;
The reception provided at the station side and transmitted from each peripheral base station.
The best base station is selected based on the level detection information,
A base that switches the communication channel to the selected base station
Station selection meansMobile communication channel switching control system
To be a gist. More specifically, the distance information transmitting means includes:
The communication base station stored in advance as the distance information
Weighting coefficients corresponding to the distances between the
The signal is transmitted to each peripheral base station, and the reception level detecting means
The reception level of the transmission information from the detected mobile station is
According to the weighting factor transmitted from the distance information transmitting means
Weighting is performed, and this is used as the reception level detection information.
Transmitting to the control station, the base station selecting means
Of the reception level detection information formed by
Surrounding base stations indicating reception level detection information
Is selected as the base station that performs switching. Also,An eighth feature of the present invention is thatThe control station
The reception level of the transmission information transmitted from the mobile station.
The base station currently communicating with the mobile station to detect
Controlling each peripheral base station located around the station
Wherein the control station is the communication base station stored in advance.
Distance information on the distance between the
Transmitting to the local base station. In addition, each of the above
A mobile station detected by a peripheral base station under the control of the control station.
The reception level of the transmission information from the control station.
Reception level detection information reflecting the distance information
Transmitting to the control station, and the control station,
The reception level detection information transmitted from each peripheral base station
Select the best base station based on the selected base station
Switching the communication channel toTransfer
The point is that it is a mobile communication channel switching control method.. [0033] More specifically, the control station is capable of transmitting the distance information.
The communication base station and each peripheral base stored in advance as
A weighting coefficient according to the distance from the base station
Station, and each of the peripheral base stations transmits from the control station.
Detected under the control of the control station by the weighting coefficient
Weight for the reception level of transmission information from the mobile station
To the control station as the reception level detection information.
Transmit, the control station is formed by the weighting
Among the reception level detection information, the highest reception level detection information
Switch the communication channel with the neighboring base station indicating the information
Select as base station. Such a mobile communication channel switching control system
System and a mobile communication channel switching control method, comprising:
Detects the reception level of the transmission information from the mobile station, and
Between the communication base station and each surrounding base station
A system that weights according to the distance and sends it to the control station
And method. With this, the level of the temporary reception level can be reduced.
Without being confused, choose the truly optimal base station
The communication channel can be switched to the base station. The mobile communication channel according to the present invention
Control system and mobile communication channel switching control method
Reduces the communication rate in places where communication is concentrated.
Base station that forms a relatively small service area
Base station with which mobile stations communicate
System and method that can be assigned preferentially
The capacity of mobile stations in the entire mobile communication system
Can be enhanced. [0037] DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mobile communication channel according to the present invention will be described.
Control system and mobile communication channel switching control method
Preferred embodiments of the method will be described in detail with reference to the drawings.
This will be described in detail. The mobile communication channel switching control system according to the present invention
The system and the mobile communication channel switching control method are shown in FIG.
It can be applied to such a car telephone system. First, the self-timer according to the first embodiment of the present invention will be described.
The main parts of the mobile phone system are, for example,
For controlling communication between the mobile station 1 and the plurality of base stations 2
And the bureau 3. Each of the base stations 2 has a predetermined range.
Form the service area (wireless zone) CELA to CELE
The control station 3 is located between the service areas.
Communication channel (communication base) according to the movement of the mobile station 1
Station). Also this
The switching of the communication channel is performed when the mobile station 1 is in the peripheral base station 2
The level of the received information is detected, and this detection result is displayed.
A “data” to be transmitted to the control station 3 via the communication base station in communication.
Digital mobile communication system ". Specifically, according to the first embodiment,
Switching of communication channels in a mobile telephone system
The work is as shown in the flowchart of FIG.
First, in step S1, the mobile station 1
Services located around the service area CELA
Each of the base stations 2b to form the seria CELB to CELE
2e, receive the transmission information from each, and go to step S2.
move on. In step S2, the mobile station 1 establishes
The reception levels of the transmission information from the stations 2b to 2e are respectively detected.
Out and go to step S3. In step S3, the mobile station
1 indicates each reception level detected in step S2
Control station via communication base station 2a which is a base station in communication
3 and then proceeds to step S4. Next, in step S4, the control station 3
Are transmitted from the mobile station 1 to the peripheral base stations 2b to 2e.
It is determined whether or not the reception level of the communication information has been transmitted.
In the case of, the step is performed until the reception level is transmitted.
Repeat S4, and if yes, proceed to step S5.
No. In step S5, the control station 3 sends the
Receiving each reception level transmitted from the station 1 and
Proceed to 6. In step S6, the control station 3
A base station near the communication base station 2a with which the station 1 is communicating.
The station is searched, and the process proceeds to step S7. In step S7,
The control station 3 communicates with a base station stored as distance information in advance.
Based on the distance information indicating the distance to the base station, the current
Between the communication base station 2a and each of its peripheral base stations 2b to 2e
Distances, and use weighting coefficients according to the distances.
Then, weighting is performed on each of the reception levels, and step S8 is performed.
Proceed to. Specifically, each of the peripheral base stations 2b to 2e
Are E2, E3, E4, and E5, respectively.
E2> E5> E3> E4, and
Assigned in ascending order of the distance from the communication base station 2a.
X1, X2, X3, X4, and X1
> X2> X3> X4, the control is performed.
The station 3 receives each weighted signal by the weighting coefficient.
The transmission level EI is formed. That is, the communication base station 2
The distance between the peripheral base stations 2b to 2e was closer in order.
Then, the control station 3 determines that EI2 = E2 + X1, EI
3 = E3 + X2, EI4 = E4 + X3, EI5 = E5 +
Each reception level EI weighted like X4 is formed.
To achieve. In step S8, the control station 3 determines that the weight
Indicates the highest level among the received reception levels EI
Select the reception level to be used and the surrounding bases that indicate this reception level.
Determine the station as the base station to
Proceed to step S9. In this case, the weighting gives EI
2> EI3> EI4> EI5, the control station 3
Selects the reception level EI2 indicating the highest level,
Switch the surrounding base station 2b indicating the reception level to the communication channel
Decide on the replacement base station. The mobile station 1 communicates by moving
When the reception level of the transmission information from the base station 2a decreases,
Alternatively, the reception level of the transmission information from other neighboring base stations is
Higher than the reception level of the transmission information from the communication base station 2a
Then, the communication channel is communicated to the control station 3 via the communication base station 2a.
A request for switching the channel is made. In step S9, this transfer
Whether or not there is a call channel switching request from the mobile station 1
And in the case of No, a call channel switching request
Steps S4 to S9 until there is
Repeat the step, and if yes, proceed to step S10.
No. In step S10, the control station 3
Switching destination of the communication channel determined in step S8
Of the base station via the communication base station 2a currently communicating
Station 1 and call the base station to
The channel is switched and the process returns to step S1. During a call, such a step S
1 to repeatedly execute each routine shown in step S10.
It has become so. As is clear from the above description, the first
The mobile telephone system according to the embodiment
Are detected by the mobile station 1 “each of the peripheral base stations 2b to 2b”.
e reception level ”and stored in the control station 3 in advance.
“The distance between the communication base station 2a and each of the peripheral base stations 2b to 2e.
In accordance with “separation”, each reception level is weighted, and
Call the base station with the highest reception level by weighting
As the base station to which the channel is switched,
Perform switching. [0050] This makes it possible to reduce the strength of the temporary reception level.
Without being confused, choose the truly optimal base station
The communication channel can be switched to the base station. In a place where communication is concentrated,
Service area to reduce traffic rate
Mobile station communicates even when installing base station to form
Base station that performs
To increase the capacity of mobile stations in the entire mobile telephone system
Can be. Next, according to the second embodiment of the present invention,
The mobile phone system will be described. The car telephone according to the first embodiment described above.
The system is described in “Digital Mobile Communication System”
Is weighted by the control station 3,
The mobile telephone system according to the second embodiment
In the "Digital Mobile Communication System"
In this case, the mobile station 1 performs the communication. The vehicle according to the second embodiment
The configuration of the telephone system is according to the first embodiment described above.
Because it is similar to a car phone system, only its operation is detailed
explain. That is, the self-timer according to the second embodiment
Switching operation of communication channel in mobile telephone system
Is as shown in the flowchart of FIG.
The communication base station 2a currently communicating is stored in advance.
Communication base station 2a and peripheral base stations located around the communication base station 2a
A weighting coefficient corresponding to the distance between the mobile station and the mobile station;
1 indicates a reception level indicating a neighboring base station from which the reception level is to be detected.
The mobile station 1 transmits the measurement target station information to the mobile station 1. Step S
In step 11, the mobile station 1 determines the weighting factor and the reception level.
After receiving the measurement target station information, the process proceeds to step S12. In step S12, the mobile station 1
Each peripheral base station 2b-
The reception level of 2e is detected, and the process proceeds to step S13. S
In step S13, the mobile station 1 detects each of the detected neighboring base stations.
For each of the reception levels 2b to 2e,
The weight is used, and the process proceeds to step S14. Steps
In S14, each of the weights formed by performing the weighting is determined.
The reception level information is transmitted to the control station 1 via the communication base station 2a.
Send. Next, in step S15, the control station
3 indicates that each of the reception level information has been transmitted from the mobile station 1.
Is determined, and if No, each mobile station 1
Step S15 is repeated until the file information is transmitted.
Then, in the case of Yes, the process proceeds to step S16. Step S
At 16, the control station 3 receives the signal transmitted from the mobile station 1.
The communication level information is received, and the process proceeds to step S17. Step
In step S17, the control station 3 sends a request based on the reception level information.
The weighted value indicates the highest reception level.
Determine the base station as the base station to
Proceed to step S18. In step S18, the mobile station 1
Whether there is a call channel switching request
In the case of No, the process returns to step S15, and in the case of Yes,
Goes to step S19. In step S19, the control station
3 is the communication channel determined in step S17.
To the base station that is currently communicating
a to the mobile station 1 via a
Step S1 switches the communication channel to the base station.
Return to 1. During a call, such a step S
Repeat each routine shown in 11 to step S19
It is supposed to. As is clear from the above description, the second
The mobile phone system according to the embodiment
Correspond to the reception level of each of the neighboring base stations 2b to 2e.
Distance between the communication base station 2a and each of the peripheral base stations 2b to 2e.
The weighting is performed in accordance with the weight and transmitted to the control station 3. And the system
The receiving level at which your station 3 shows the highest value by this weighting
Of the base station as a destination base station for switching the communication channel.
Switch the communication channel. As a result,
The same effect as the car telephone system according to the first embodiment is obtained.
Obtainable. Next, according to the third embodiment of the present invention,
The mobile phone system will be described. The automatic operation according to the first and second embodiments described above
In the car telephone system, the mobile station 1 transmits from the peripheral base station 2
Detects the information reception level and is communicating the detection result
“Digital migration” transmitted to the control station 3 via the communication base station of
That switch the communication channel using the "mobile communication system"
However, the mobile phone system according to the third embodiment
Stem and a car according to a fourth embodiment described later
The telephone system includes, as shown in FIG.
2e is the reception level of the transmission information transmitted from the mobile station 1.
Is transmitted to the control station 3 by detecting
"Analog mobile communication system" that switches channels
It depends. The mobile telephone system according to the third embodiment
The switching operation of the communication channel in the system is shown in FIG.
First, in step S21,
Each of the peripheral base stations 2b to 2e receives the reception level from the control station 3.
Upon receiving the detection instruction, the process proceeds to step S22. Stay
In step S22, each of the peripheral base stations 2b to 2e
Detects the reception level of the transmission information from
Proceed to step S23. In step S23, each peripheral base station 2
b to 2e send the detected reception levels to the control station 3 respectively.
Send. Next, in step S24, the control station 3
The reception level is transmitted from each of the peripheral base stations 2b to 2e.
Is determined, and in the case of No, step S24 is performed.
Repeat, if Yes, proceed to step S25. Stay
In step S25, the control station 3 transmits the information to each of the neighboring base stations 2b to 2e.
Receiving each reception level sent from
Proceed to S26. In step S26, the control station 3
A base station near the communication base station 2a during communication is detected and the
Proceed to step S27. In step S27, the control station 3
Each reception level transmitted from each of the peripheral base stations 2b to 2e
The communication base station 2a and each peripheral base station stored in advance
Using a weighting coefficient corresponding to the distance between 2b and 2e
, And the process proceeds to step S28. In step S28, the control station 3
The maximum reception level is detected by
Switching the base station corresponding to the reception level of the communication channel
The destination base station is determined, and the process proceeds to step S29. In the analog mobile communication system, the mobile
When the reception level of the transmission information from the mobile station 1 becomes low, the communication base
The local station 2a detects this and issues a switching request to the control station 3.
Or the reception level of the transmission information from the mobile station 1 is high.
Peripheral base station detects this and switches to control station 3.
Make a request. Therefore, step S2
9, the control station 3 sends the communication base station 2a or the peripheral base station 2a.
Determines whether the base station has requested a call channel switch.
If the determination is No, the process returns to step S24 and returns Yes.
In this case, the process proceeds to step S30. In step S30, the system
The communication channel determined by the station 3 is determined in the step S28.
The base station to which the channel is switched
The mobile station 1 is designated via the station 2a and the switching is performed.
Step by controlling the switching of the communication channel to the destination base station
It returns to S21. During a call, such a step S
21 to repeatedly execute each routine shown in step S30
It is supposed to. As is clear from the above description, the third
The mobile phone system according to the embodiment
In the “mobile communication system”, each of the peripheral base stations 2b to 2e
Detects the reception level of the transmission information from the mobile station, and
Is between the communication base station 2a and each of the peripheral base stations 2b to 2e.
Weighting is performed according to the distance, and this weighting
Switching the base station of the reception level indicating the value to the communication channel
The communication channel is switched as the previous base station. This
Thereby, the automobile according to the above-described first and second embodiments
The same effect as the telephone system can be obtained. Next, the self-timer according to the fourth embodiment of the present invention will be described.
The mobile phone system will be described. The car telephone according to the third embodiment described above.
The system allows the control station 3 to perform the weighting.
The mobile phone according to the fourth embodiment.
The system assigns the weight to each of the peripheral base stations 2b to 2e.
It is something to do. The vehicle according to the fourth embodiment
The configuration of the telephone system is according to the third embodiment described above.
Because it is similar to a car phone system, only its operation is detailed
explain. That is, the self-timer according to the fourth embodiment
Switching operation of communication channel in mobile telephone system
Is as shown in the flowchart of FIG.
Instead, the control station 3 transfers to each of the neighboring base stations 2b to 2e.
Detection is performed to detect the reception level of transmission information from mobile station 1.
Output command, and is stored in the control station 3 in advance.
According to the distance between the communication base station 2a and the peripheral base stations 2b to 2e.
The weighted coefficients are transmitted. In step S31
In the meantime, each of the neighboring base stations 2b to 2e
Received the reception level detection command and weighting coefficient
Proceed to step S32. In step S32, each peripheral base
The local stations 2b to 2e receive the transmission information from the mobile station 1.
And the process proceeds to step S33. Steps
In S33, each of the neighboring base stations 2b to 2e performs Step S3.
Using the weighting coefficient for the reception level detected in step 2,
Weighting is performed and the process proceeds to step S34. Step S34
Then, each of the neighboring base stations 2b to 2e performs the weighting.
The received reception level is transmitted to the control station 3. Next, in step S35, the control station 3
Weighted reception from each of the peripheral base stations 2b to 2e
It is determined whether or not the level has been transmitted.
Step S35 is repeated, and if Yes, step S
Proceed to 36. In step S36, the control station 3
The weighting transmitted from the base stations 2b to 2e is performed.
After receiving each received level, the process proceeds to step S37. Stay
In step S37, the control station 3
Detects the highest reception level from the levels and
Switching the base station corresponding to the reception level to the communication channel
The previous base station is determined, and the process proceeds to step S38. Steps
In S38, the control station 3 sets the communication base station 2a as described above.
Alternatively, a call channel switching request is issued from a peripheral base station.
Is determined, and if No, the process returns to step S35.
Otherwise, in the case of Yes, the process proceeds to step S39. Step S
In step 39, the control station 3 determines in step S37.
Communication with the base station to which the specified
When the mobile station 1 is designated via the inside communication base station 2a,
In addition, the communication channel is switched to the base station of the switching destination.
And returns to step S31. During a call, such a step S
Each routine shown in 31 to step S39 is repeatedly executed
It is supposed to. As is clear from the above description, the fourth
The mobile phone system according to the embodiment
In the “mobile communication system”, each of the peripheral base stations 2b to 2e
Detects the reception level of transmission information from the mobile station, and
The communication between the communication base station 2a and the peripheral base stations 2b to 2e
Weights according to the distance between them, and transmits the weight to the control station 3.
You. Then, the control station 3 obtains the highest value by this weighting.
The base station with the indicated reception level
The communication channel is switched as a base station. to this
From the above, the car telephone system according to each of the above embodiments and
The same effect can be obtained. In the description of each of the above embodiments,
Mobile communication channel switching control system and mobile according to the invention
Application of communication channel switching control method to mobile telephone system
However, this is a mobile phone system and a simple type
For mobile communication systems such as mobile phone systems (PHS)
You may make it apply. The maximum value is obtained by the weighting described above.
Switch the call channel based on the received
But this is, for example, counting from the highest
Based on the reception level indicating the second value,
Based on "predetermined value", such as selecting the switching destination
May also be performed, and in addition, the technical
Various changes may be made depending on the design, etc. as long as they do not deviate from the idea.
Of course, further modifications are possible. [0077] The mobile communication channel switching control according to the present invention.
The system and the mobile communication channel switching control method
In areas where the seria is complicated
Also selects the optimal base station according to the movement of the mobile station.
Switch the communication channel to maintain good calls.
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a first embodiment of a mobile telephone system to which a mobile communication channel switching control system and a mobile communication channel switching control method according to the present invention are applied. FIG. 2 is a flowchart for explaining a switching operation of a communication channel of the mobile telephone system according to the first embodiment. FIG. 3 is a flowchart for explaining a call channel switching operation in a second embodiment of the mobile telephone system to which the mobile communication channel switching control system and the mobile communication channel switching control method according to the present invention are applied. FIG. 4 is a block diagram showing a configuration of a third embodiment of a mobile telephone system to which a mobile communication channel switching control system and a mobile communication channel switching control method according to the present invention are applied. FIG. 5 is a flowchart for explaining a switching operation of a communication channel of the car telephone system according to the third embodiment. FIG. 6 is a flowchart illustrating a switching operation of a communication channel in a fourth embodiment of the mobile telephone system to which the mobile communication channel switching control system and the mobile communication channel switching control method according to the present invention are applied. FIG. 7 is a schematic diagram showing distribution of service areas in a mobile communication system. FIG. 8 is a schematic diagram for explaining conventional switching of a communication channel. [Description of Signs] 1 Mobile station 2 Base station 3 Control stations CELA to CELE Service area

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Watanabe 2-10-1 Toranomon, Minato-ku, Tokyo NTT Mobile Communication Network Co., Ltd. (72) Inventor Kenshi Funakoshi Toranomonji, Minato-ku, Tokyo No. 10-1 in NTT Mobile Communication Network Co., Ltd. (56) References JP-A-4-144429 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04B 7/24-7/26 102 H04Q 7/00-7/38

Claims (1)

  1. (57) [Claims 1] When a mobile station that is in a call moves between radio zones formed by a plurality of base stations, a control station that satisfies a predetermined switching condition. A mobile communication channel switching control system for maintaining a call by switching a communication channel to a station, wherein the system is provided in each of the base stations and stored in advance when the communication base station performs communication with the mobile station. Distance information transmitting means for transmitting, to the mobile station, distance information on the distance between the communication base station and its peripheral base station; and transmission information provided on the mobile station side and transmitted from each peripheral base station. Receiving level detecting means for detecting the receiving level of each of the mobile base stations; transmitting the receiving level of each of the peripheral base stations detected by the receiving level detecting means from the communication base station. A reception level transmitting unit configured to reflect the distance information on the distance between the communication base station and the surrounding base station, and to transmit these to the control station as reception level detection information, provided on the control station side. Receiving the reception level detection information transmitted from the reception level transmission means, selecting the optimum reception level detection information from among them, and switching the communication channel to the base station indicated by the optimum reception level detection information. And a base station selecting means for performing the control. 2. The distance information transmitting means transmits a weighting coefficient according to a distance between a communication base station and a neighboring base station stored in advance to the mobile station as the distance information, Means for weighting the reception level of each peripheral base station with the weighting factor transmitted as the distance information to form reception level detection information, and wherein the base station selecting means includes: 2. The method according to claim 1, wherein the highest reception level detection information is detected from the reception level detection information, and a peripheral base station indicating the reception level detection information is selected as a peripheral base station for switching a communication channel. A mobile communication channel switching control system according to claim 1. 3. A communication system in which a control station switches a communication channel to a base station that satisfies a predetermined switching condition when a mobile station that is in a call moves between wireless zones formed by a plurality of base stations. A mobile communication channel switching control system provided on the control station side, the communication base station currently communicating with the mobile station so as to detect a reception level of transmission information transmitted from the mobile station. Receiving level detection control means for controlling a peripheral base station located in the vicinity of a station, provided on the control station side, and prestored distance information on the distance between the communication base station and each peripheral base station. A distance information transmitting unit for transmitting to each of the peripheral base stations, and a receiving level of transmission information from a mobile station provided in each of the base stations according to control by the control station. A signal level reflecting the distance information transmitted from the distance information transmitting means, and receiving level detection means for transmitting this to the control station as reception level detection information. Base station selecting means for selecting an optimum base station based on the reception level detection information transmitted from the base station and switching a communication channel to the selected base station. Switching control system. Wherein said distance information transmission means, as the distance information, and transmits the weighting coefficient corresponding to the distance between the communication base station stored in advance with the surrounding base stations in respective peripheral base stations The reception level detection means weights the detected reception level of the transmission information from the mobile station in accordance with the weighting factor transmitted from the distance information transmission means, and uses this as the reception level detection information as a control station. The base station selecting means selects, from among the reception level detection information formed by the weighting, a peripheral base station indicating the highest reception level detection information as a base station for switching a communication channel. 4. The mobile communication channel switching control system according to claim 3, wherein: 5. A communication system in which a control station switches a communication channel to a base station that satisfies a predetermined switching condition when a mobile station that is in a call moves between wireless zones formed by a plurality of base stations. A mobile communication channel switching control method for maintaining the communication base station, wherein, among the respective base stations, a base station that has become a communication base station that performs communication with the mobile station, the communication base station stored in advance and the A step A of transmitting distance information relating to a distance to a peripheral base station to the mobile station; and the mobile station detects a reception level of transmission information transmitted from each peripheral base station. Transmitting the level to the control station as reception level detection information reflecting the distance information transmitted from the communication base station and relating to the distance between the communication base station and its surrounding base stations. B, and the step C in which the control station selects the optimum reception level detection information from the respective reception level detection information and switches the communication channel to the base station indicated by the optimum reception level detection information. A mobile communication channel switching control method, comprising: 6. The method according to claim 6, wherein the communication base station transmits to the mobile station, as a distance information, a pre-stored weighting coefficient corresponding to a distance between the communication base station and a peripheral base station, as the distance information. A step E in which the mobile station weights the reception levels of the respective peripheral base stations using the weighting coefficients to form reception level detection information; and the control station detects each reception level formed by the weighting. From the information, the highest reception level detection information is detected, and the neighboring base stations indicating this reception level detection information are
    6. The mobile communication channel switching control method according to claim 5, further comprising the step of selecting a peripheral base station for switching a communication channel. 7. A communication system in which a control station switches a communication channel to a base station that satisfies a predetermined switching condition when a mobile station that is in a call moves between wireless zones formed by a plurality of base stations. A mobile communication channel switching control method for continuity of the communication base station, wherein the control station detects the reception level of transmission information transmitted from the mobile station, respectively, around a communication base station currently communicating with the mobile station. Controlling each peripheral base station located in the peripheral base station, and the control station transmits distance information on a distance between the communication base station and each peripheral base station stored in advance to each peripheral base station. Step B: detecting the reception level of the transmission information from the mobile station detected by each of the peripheral base stations under the control of the control station, the reception level reflecting the distance information transmitted from the control station. Transmitting the information to the control station as information, the control station selects an optimal base station based on the reception level detection information transmitted from each of the peripheral base stations, and a communication channel to the selected base station. And a step D of switching the mobile communication channel. Wherein said control station, as the distance information, and transmits the weighting coefficient corresponding to the distance between the communication base station stored in advance with the surrounding base stations in respective neighboring base stations, wherein Each peripheral base station weights the reception level of the transmission information from the mobile station detected under the control of the control station by the weighting coefficient transmitted from the control station, and uses this as the reception level detection information. The control station, among the reception level detection information formed by the weighting, the peripheral base station indicating the highest reception level detection information, selecting a base station to switch the communication channel, The mobile communication channel switching control method according to claim 7.
JP18248296A 1996-07-11 1996-07-11 Mobile communication channel switching control system and mobile communication channel switching control method Expired - Lifetime JP3382783B2 (en)

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US6381828B1 (en) 1999-11-01 2002-05-07 Callaway Golf Company Chemical etching of a striking plate for a golf club head
US6435977B1 (en) 1999-11-01 2002-08-20 Callaway Golf Company Set of woods with face thickness variation based on loft angle
US6368234B1 (en) 1999-11-01 2002-04-09 Callaway Golf Company Golf club striking plate having elliptical regions of thickness
US6371868B1 (en) 1999-11-01 2002-04-16 Callaway Golf Company Internal off-set hosel for a golf club head
US6440011B1 (en) 1999-11-01 2002-08-27 Callaway Golf Company Method for processing a striking plate for a golf club head
US6354962B1 (en) 1999-11-01 2002-03-12 Callaway Golf Company Golf club head with a face composed of a forged material
US6398666B1 (en) 1999-11-01 2002-06-04 Callaway Golf Company Golf club striking plate with variable thickness
US6348015B1 (en) 2000-03-14 2002-02-19 Callaway Golf Company Golf club head having a striking face with improved impact efficiency
US6390932B1 (en) 2000-04-18 2002-05-21 Callaway Golf Company Compliant polymer face golf club head
JP4788905B2 (en) * 2006-05-01 2011-10-05 日本電気株式会社 Mobile communication system and base station antenna proximity determination method
JP2008098847A (en) * 2006-10-10 2008-04-24 Nec Corp Mobile communication system and handover control method
US8774808B2 (en) 2009-07-29 2014-07-08 Kyocera Corporation Radio base station and communication control method
JP2010028873A (en) * 2009-11-05 2010-02-04 Mitsubishi Electric Corp Terminal station
JP5757203B2 (en) * 2011-09-07 2015-07-29 住友電気工業株式会社 Radio base station apparatus, communication control method, and communication control program

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