JP2985117B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device,
More specifically, the present invention relates to a wireless communication device capable of communicating with both a private base station area and a public base station area.

[0002]

2. Description of the Related Art Conventionally, as such a wireless communication device,
For example, there is a PHS (Personal Handy phone System).

[0003] The PHS is a wireless communication device capable of communicating via a private base station (private base station) connected to an existing telephone line network and a public base station.

[0004] In this radio communication device, the use of a private base station connected to a telephone line network results in a lower call charge than that of communication using a public base station. In an area where communication with a base station is possible (hereinafter, simply referred to as a private base station area), communication is always performed using the private base station, and a public base station is used only when moving out of the private base station area. Thus, even if communication is performed with a public base station outside the area of the private base station, if the mobile terminal moves into the area of the private base station, communication via the private base station is required.

[0005] For this reason, the conventional radio communication apparatus synchronizes with the self-service base station based on a predetermined timing created inside the telephone apparatus, regardless of whether or not the radio communication apparatus exists in the area of the self-service base station. Attempts to establish synchronization with the self-operating base station determine that the area is the self-operating base station area, and use the self-operating base station for communication from the position determined to be the self-operating base station.

[0006]

However, in such a conventional wireless communication apparatus, synchronization is attempted with respect to the private base station irrespective of whether or not it exists in the private base station area. Therefore, there were the following problems.

[0007] That is, whether or not the current position is within the area of the private base station is determined by an attempt to synchronize with the private base station. It is performed intermittently even when the power of the apparatus is off.

[0008] In a wireless communication device mainly used for portable mobile use, it is required to reduce power consumption at all, due to the built-in battery, but power is consumed when trying to synchronize. Outside the station area, wasteful power is consumed.

Therefore, in order to suppress unnecessary power consumption,
For example, it is conceivable to switch whether or not to try to synchronize within and outside the area of the private base station by setting a switch operation or setting an operation mode, but in this case, setting the switch operation and the operation mode is complicated. In addition, due to forgetting to switch settings, setting errors, and misjudgment inside and outside the area of the private base station, wasteful power consumption cannot be suppressed, and calls cannot be made while in the private base station area. New problems, such as pitfalls, arise. Ma
For example, for example, "Digital
A base that exists near the base unit, such as a cordless telephone
The position of the slave unit based on the detection of the station identification number
Automatically connects the private line to the public line.
By switching, the line mode can be used especially around the home.
Automatically inexpensive self-employed without being aware of switching operation
The line is selected for use. But this
Digital cordless phones, around the base unit
The base station is determined based on whether the identification number of the base station
Judgment of the location of the machine and connection between private line and public line
Only switch the public line.
When transferring the synchronization status between the slave unit and the base station to a private line,
Consider how to synchronize the slave unit with the master unit.
Transfer from public line to private line
Lines may not run smoothly.

[0010]

It is an object of the present invention to provide a radio communication device that performs reliable and efficient synchronization inside and outside the area of a private base station.

[0011]

According to the first aspect of the present invention,
Perform wireless communication with a base station connected to a communication network
In a wireless communication apparatus, a communication area near a communication area of a predetermined base station is
Recording means for recording synchronization information of at least one base station
If, synchronized current and synchronization information recorded in said recording means
Detecting means for detecting a coincidence between the synchronization information of the base station that, the
If a match is detected by the detecting means, the predetermined base station channel
Control to shorten the search cycle and detect inconsistencies
, Increase the period of the predetermined base station channel search
And control means for controlling so that, as characterized in that it comprises
I have.

In this case, the invention described in claim 1 above.
In addition to the above, the invention according to claim 2 stores in the recording means
Neighbor to input synchronization information of at least one base station
It is effective to have a group Chikyoku input means.

Further, in addition to the above-mentioned claim 1,
The invention according to claim 3 is characterized in that the predetermined base station is operated by a
It is characterized by being a base station.

[0014] Further, in addition to the invention described in claim 2 described above.
The invention according to claim 4 is characterized in that the adjacent base station input means
During synchronization establishment with the predetermined base station,
Search means for searching whether information can be received, and this search
When synchronization information of another base station can be received by the search means,
Register the received synchronization information of the other base station in the storage unit
It is effective to have a registration means for performing the registration .

The invention according to claim 5 is connected to a communication network.
Wireless communication with the designated base station, and
Record synchronization information of at least one base station near the communication area.
Storage means, and the synchronization information stored in the storage means and the current
If the synchronization information of the currently synchronized base station matches,
The operation of establishing synchronization with the base station is started.
Wireless communication device that stops the operation of establishing synchronization with a fixed base station.
There are, same of another base station during establishment of synchronization with the predetermined base station
Search means the period information is searched whether it can receive, the
When the synchronization information of another base station was received by the search means
And stores the received synchronization information of the other base station in the storage means.
Register means for registering .

[0016]

According to the first aspect of the present invention, the recording means includes
Of at least one base station near the communication area of the fixed base station
The synchronization information is recorded, and is recorded on the recording means by the detection means.
Synchronization information of the base station currently synchronized with the recorded synchronization information
If a match is detected, the control means
It is controlled so as to shorten the station channel search cycle.
On the other hand, if a mismatch is detected, the control means
It is controlled to lengthen the cycle of local station channel search.
You. According to the third aspect of the present invention, the above-mentioned claim is provided.
In addition to the first aspect, the predetermined base station may be a self-owned base station.
It is a local office.

Thus, synchronization is reliably and efficiently performed inside and outside the area of the private base station, and an increase in power consumption due to useless synchronization operation is suppressed.

In this case, according to the second aspect of the present invention,
In addition to the invention described in claim 1 above, in addition to the neighboring base station
At least one stored in the recording means by force means
Input of the synchronization information of the base station of
Processing load is reduced, and the desired synchronization information
Can be set.

According to the fourth aspect of the present invention,
In addition to the invention according to claim 2, the adjacent base station input
In the power means, the search means synchronizes with the predetermined base station.
During establishment, it is checked whether synchronization information of another base station can be received.
Search and receive synchronization information of another base station,
Recording means for storing the received other base station in the storage means.
By registering the synchronization information, the synchronization information of another base station can be obtained.
Information can be automatically registered, and outside the area of the specified base station.
Synchronization operation to other base stations is performed efficiently, and useless synchronization
An increase in power consumption due to the operation is suppressed.

According to the fifth aspect of the present invention, a communication is provided.
Performs wireless communication with a base station connected to the
Of at least one base station near the communication area of the fixed base station
The synchronization information is stored in the storage unit, and the synchronization information is stored in the storage unit.
Synchronization information matches the synchronization information of the base station currently synchronized
Then, the operation of establishing synchronization with the predetermined base station starts, and
, The radio which stops the synchronization establishment operation with the predetermined base station
In the communication device, the search unit is configured to communicate with the predetermined base station.
Whether synchronization information of other base stations can be received during synchronization establishment
Was searched, and synchronization information with other base stations could be received.
At this time, the registration means stores the other received
The synchronization information of the base station is registered.

Thus, synchronization with a predetermined base station is being established.
However, synchronization information of other base stations can be registered automatically,
Efficient synchronization with other base stations outside the area of the given base station
It is performed well and suppresses the increase in power consumption due to useless synchronization operation.
available. In addition, transition from public base stations to self-owned base stations,
Alternatively, the transition from self-owned base stations to public base stations has
Will be

[0022]

An embodiment will be described below with reference to FIGS.

FIGS. 1 to 6 show an embodiment of the radio communication apparatus according to the present invention.

First, the configuration will be described.

FIG. 1 is a block diagram showing the overall configuration of the wireless communication apparatus 1 of the present embodiment.

In FIG. 1, a radio communication device 1 has a PHS
The wireless communication device 1 includes an antenna 11, a high-frequency unit 12, a modem unit 13, a TDMA (Time Division
Multiple Access) section 14, speech codec section 1
5. PCM (Palse Code Modulation) codec unit 1
6, amplifier 17, speaker 18, microphone 19, display unit 2
1, control unit 22, ROM23, RAM24, recording / reproducing circuit 2
5, a memory 26, and a key input unit 27.
X is a crystal oscillator provided in the PCM codec section 16.

The antenna 11 transmits and receives voice data to and from a predetermined base station when used as a PHS terminal.

As shown in FIG. 1, the high frequency section 12 includes a changeover switch 31, a receiver 32, and a PLL (Phase Locked Loo
p) It is composed of a synthesizer 33 and a transmitter 34, and performs frequency conversion processing on a received signal received by the antenna 11.

The changeover switch 31 is used to receive a radio wave from a base station based on a control signal from the control unit 22.
Switching to the receiver 32 side, and when transmitting radio waves to the base station, switching to the transmitter 34 side.

When the signal input from the antenna 11 is input via the changeover switch 31 for distributing transmission / reception, the receiver 32 converts the received signal by a three-stage mixer.
From 1.9 GHz to around 250 MHz (1stIF), further around 10 MHz (2ndIF), further 1 MHz
The frequency conversion is performed on the IF signal in the vicinity (3rdIF).

The PLL synthesizer 33 outputs a local oscillation signal for frequency conversion in the receiver 32 and the transmitter 34.

The transmitter 34 converts the π / 4 shift QPSK modulated wave input from the modem section 13 into 10
MHz to about 250 MHz, and further to a 1.9 GHz band.
It radiates from.

The modem unit 13 performs modulation / demodulation processing of π / 4 shift QPSK. Specifically, at the time of reception, the modem unit 13 demodulates IQ data from an IF signal input from the receiver 32, and further demodulates. The converted signal is converted into a serial data string and transferred to the TDMA unit 14. On the other hand, at the time of transmission, the data transferred from the TDMA unit
Data is generated to generate a π / 4 shift QPSK modulated wave, and the π / 4 shifted QPSK modulated wave is output to the transmitter 34.

The TDMA section 14 performs frame synchronization and data transmission / reception processing. Specifically, at the time of reception, a unique word (synchronization signal) is received from the reception data sent from the modem section 13. Extract and synchronize the frame, and control data part in this received data,
The descrambling or the like of the audio data section is released, the control data is transferred to the control section 22, and the audio data is transferred to the speech codec section 15. On the other hand, at the time of transmission,
The transmission data is created by adding control data and the like to the audio data transferred from the speech codec unit 15, and after processing such as scrambling is performed, a unique word and the like are added and formatted, and inserted at a predetermined timing of the TDMA frame. And outputs it to the modem unit 13.

The speech codec unit 15 performs compression / expansion processing of digital audio data. Specifically, at the time of reception, the ADPCM audio signal (4 bits × 8 kHz = 32 kb) transmitted from the TDMA unit 14 is received.
ps) to a PCM audio signal (8 bit × 8 kHz = 64 k)
bps), which is then expanded and output to the PCM codec unit 16, while the PCM audio signal sent from the PCM codec unit 16 is transmitted during transmission.
TDM compressed by encoding to PCM audio signal
This is output to the A section 14.

The PCM codec section 16 performs an analog / digital conversion process. Specifically, at the time of reception, the PCM audio signal transmitted from the speech codec section 15 is D / A converted and converted. An analog audio signal obtained from the microphone 19 is output to an amplifier, while an analog audio signal input from the microphone 19 is A / D-converted during transmission, and a PCM audio signal, which is a digital audio signal obtained by the conversion, is converted to a speech codec. This is output to the unit 15. Also, P
The CM codec unit 16 also controls the volume, ringer, and tone signal of the audio signal.

The amplifier 17 amplifies the analog audio signal sent from the PCM codec section 16 and
The speaker 18 outputs audio to the outside based on the audio signal amplified via the amplifier 17 in the receiver of the PHS terminal.

The microphone 19 is for inputting an audio signal to the PCM codec section 16 in the transmitting section of the PHS terminal.

The display section 21 is constituted by a simple matrix liquid crystal display (LCD) and displays a predetermined image specified by the control section 22.

The control section 22 outputs various control signals to each section in the wireless communication apparatus 1 based on a predetermined program stored in the ROM 23, and controls the entire apparatus.

The ROM 23 is a semiconductor memory for storing programs and data used in the wireless communication device 1, and the RAM 24 stores program data and the like used during execution of the program processing of the control unit 22, This is a semiconductor memory used as a work area.

When used as a PHS terminal, the recording / reproducing circuit 25 records a message transmitted from the other party or reproduces the recorded message of the other party in the answering machine mode. Memory 26
When using as a PHS terminal,
This is a memory for storing a response message to the other party and reproducing the response message in response to an incoming call.

The key input section 27 is for giving an instruction to the wireless communication apparatus 1 based on various operations by the operator.

Next, the operation of this embodiment will be described with reference to the flowcharts shown in FIGS.

FIG. 2 is a flowchart for explaining the processing when the power is turned on.

When the power switch of the wireless communication device 1 is turned on, a private channel is searched (step S1), synchronization is performed with respect to the private base station, and it is checked whether or not synchronization is established (step S1). Step S2).

In the process of step S2, when synchronization is established, a search state setting process described later is performed (step S3), and a standby state from the own base station or the public base station is set (step S4). .

On the other hand, in the process of step S2,
If the synchronization is not established, a process of determining whether to end the search for the private channel is performed (step S5),
If synchronization with the private base station is to be performed again, the process returns to step S1. If synchronization with the private base station is to be terminated, a public channel is searched (step S1).
6) Synchronization is performed with respect to the public base station (PBS), and it is checked whether synchronization is established (step S).
7).

When the synchronization is established in the processing of the above step S7, the apparatus enters a standby state from the public base station (step S8), and the processing in the above step S2
If the synchronization is not established in the processing of (1), it is not possible to connect to either the own base station or the public base station.

FIG. 3 is a flowchart for explaining the search state setting process. In this search state setting process, in addition to setting the search state, registration of synchronization information is also performed.

When the search state setting process is executed in the process of step S3 in FIG. 2, it is first determined whether synchronization has been established for a public base station or a private base station (step P1). If the synchronization has been established with the public base station, it is checked whether or not there is registration synchronization information registered in the ROM 23 or the RAM 24 by the registration processing described below with respect to the self-operating base station (step P).
2).

In the process of step P2, if there is no registration synchronization information, the process returns. On the other hand, if there is registration synchronization information, the synchronization information for the own base station is stored. It is checked whether or not the registered synchronization information matches the current synchronization information (step P3). If they match, it is determined that the terminal is currently in a public base station area close to the private base station, and A self-operated channel search for intermittently searching for a channel after a predetermined time is set (step P4).

Further, in the process of step P3,
If the synchronization information does not match, it is determined that the mobile station is currently in a public base station area remote from the private base station, and the search period for the private channel is set to be long (step P5). In this case, the search for the private channel may be stopped until the mobile terminal moves to the adjacent public base station area.

If it is determined in step P1 that the setting is for the own base station, synchronization information registration processing, that is, a public channel search is performed (step P6), and synchronization with the public base station is established. It is checked whether or not the synchronization is established (step P7). If the synchronization is not established, the process is returned. If the synchronization is established, the ROM is read.
It is checked whether or not the information has already been registered as public synchronization information in the RAM 23 or the RAM 24 (step P8). Only when the information has not been registered, the synchronization information (CS-ID, general call area, etc.) for the public base station is public synchronized. The information is registered in the ROM 23 or the RAM 24 (step P9). Subsequently, a process of determining whether to end the search of the public channel is performed (step P10).
Steps P6 to P9 until the search is completed
The process up to is repeated.

As a result, the synchronization information of the public base station near the communication area of the private base station can be automatically registered.

FIG. 4 is a flowchart for explaining the processing when moving.

When moving, it is determined whether or not the public synchronization information, which is the synchronization information for the public base station registered in step P9 of FIG. 3, has changed (whether the same synchronization information as the current one, other synchronization information, or out of synchronization). It is checked (step T1), and if it has not changed, the process is terminated. If it has changed, it is checked whether or not synchronization is established with another public base station (PBS) (step T2). .

In the process of step T2, when synchronization is established, the search state setting process shown in FIG. 3 (in this case, in the search state setting process, since synchronization with the public base station has been established, step P1 (Steps P5 to P5 are executed) (Step T3). If synchronization is not established in the processing of Step T2, it is determined that connection to another public base station is not possible, and the display unit 21 displays Out-of-service notification is performed.

FIG. 5 is a flowchart for explaining the manual registration process.

At the time of manual registration, when synchronization information registration is instructed by operating the key input unit 27, first, it is determined whether or not synchronization is performed with respect to the self-service base station (HBS) to establish synchronization. If the check is made (step Q1) and the synchronization is established, the search state setting processing shown in FIG. 3 (in this case, the processing of steps P1, P6 to P10) is performed (step Q2).

On the other hand, in the process of step Q1,
If the synchronization is not established, it is determined that the connection with the private base station cannot be established, and the display unit 21 notifies the outside of the service area from the private base station.

FIG. 6 shows a wireless communication apparatus 1 according to this embodiment.
It is a schematic diagram for demonstrating the effect | action of.

As shown in FIG. 6, a self-owned base station (HBS)
Each of the public base stations (PBS1 and PBS2) has a transmission area, and the point A is within the transmission area of the private base station (HBS), the point B is within the transmission area of the public base station (PBS1), and the public base station (PBS1). Description will be made assuming that there is a point C in the transmission area of the PBS 2).

First, since the point A in FIG. 6 is in the area of the private base station (HBS), the synchronization information of the other connectable public base station (PBS1) is stored in the wireless communication device 1 during synchronization. Is stored.

Next, when the radio communication apparatus 1 moves from the point A to the point B in FIG. 6, the radio communication apparatus 1 goes out of the area of the private base station (HBS), and thus the radio communication apparatus 1 is out of the private synchronization. Synchronization with (PBS1) is performed.

In this case, since the synchronization information stored during synchronization with the self-operating base station (HBS) matches the synchronization information of the public base station (PBS1), the synchronization information with the public base station (PBS1) is not synchronized. It is also determined that there is a high possibility that the mobile station will reenter the HBS area due to further movement, and an attempt is made to synchronize with the HBS at predetermined time intervals.

When the wireless communication apparatus 1 moves from the point B to the point C in FIG. 6, the wireless communication apparatus 1 is out of the area of the public base station (PBS1), and thus the next connectable public base station (PBS1).
Synchronization is performed with 2).

In this case, since the synchronization information stored during synchronization with the self-operating base station (HBS) does not match the synchronization information of the public base station (PBS1), the public base station (PBS2)
It is determined that the possibility of entering the self-owned base station (HBS) area due to movement within the area is small, and the self-operated base station (HB
S) to increase the time between synchronization attempts,
Alternatively, an attempt to synchronize with the HBS is stopped.

As a result, the conventional base station (HB
The number of times of synchronization that has always been attempted in S) is reduced, the power consumption is suppressed, and the portable operation time of the wireless communication device 1 becomes longer.

Further, when the wireless communication apparatus 1 moves from the point C to the point B in FIG. 6, the public base station (PBS2)
Because it is out of the area, the next connectable public base station (PB
Synchronization is performed with S1).

In this case, since the synchronization information stored during synchronization with the self-operating base station (HBS) matches the synchronization information of the public base station (PBS1) again, the mobile terminal moves within the public base station (PBS1) area. It is determined that the possibility of entering the HBS area is high and the HBS (HB)
The time interval for performing the synchronization attempt for S) is restored, or the synchronization attempt for the HBS is restarted.

As a result, when the mobile terminal enters the area of the private base station (HBS), synchronization with the private base station (HBS) that enables more economical communication is performed.

By the way, the synchronization information and the stored information of the public base station (PBS) to be stored are divided into four types of patterns depending on the transmission area between the self-operating base station (HBS) and the public base stations (PBS1 and PBS2). The results are shown in [Table 1].

As shown in [Table 1], the amount of information varies depending on the pattern, but any pattern can be used as synchronization information.

[0075]

[Table 1]

As described above, in the present embodiment, the synchronization information with the nearby public base station in the area of the private base station is
Also, in the area of the public base station, by storing synchronization information with the private base station or another public base station in the information storage unit, it is determined whether or not to attempt synchronization with the private base station based on the stored synchronization information. By judging and monitoring the control channel of the public base station, it is possible to reliably and efficiently synchronize the control channel with the own base station. Accordingly
Transfer from a public base station to a self-owned base station, or
The transition from a base station to a public base station can be performed reliably.
You.

In this embodiment, there is no need for the user to operate the switch or worry about the battery life, and there is no mistake in setting or forgetting. Can be done

In the above embodiment, as shown in [Table 1], the amount of information differs depending on the pattern, but in order to reduce the amount of information, each information amount is fixed (for example, only the general call area number). However, the present embodiment can be realized although a difference in accuracy occurs.

Further, in the above embodiment, the synchronization information of the public base station whose communication area overlaps with the communication area of the private base station is registered. However, the present invention is not limited to this. Alternatively, the synchronization information of the public base station around the communication area of the private base station may be registered (in this case, steps P6 to P10 in FIG. 3 are executed regardless of the synchronization with the private base station). .

[0080]

According to the first aspect of the present invention, the recording means includes:
At least one base station near a communication area of a predetermined base station
The synchronization information is recorded in the recording means by the detecting means.
Synchronization information of the base station currently synchronized with the recorded synchronization information
When a match is detected with the predetermined base station,
Control to shorten the cycle of channel search, while
If a mismatch is detected, the control means uses a predetermined base station channel.
Control is performed to extend the channel search cycle. Also,
According to the third aspect of the present invention, there is provided the first aspect of the present invention.
In addition to the above invention, the predetermined base station is a self-managed base station.
You.

Therefore, synchronization can be reliably and efficiently performed inside and outside the area of the self-operating base station, and an increase in power consumption due to useless synchronization operation can be suppressed.

Further , in this case, in the invention of claim 2,
Is stored in the recording means by the adjacent base station input means.
Inputting synchronization information of at least one base station
Thus, in addition to the above-described first aspect, the detecting means
Processing load can be reduced.
Synchronization information can be set.

Further, in the invention according to claim 4, the adjacent
The base station input means, by the search means, the predetermined base station and
Whether synchronization information of other base stations can be received during synchronization establishment
Searching, when the synchronization information of other base stations could be received, Noboru
Recording means for storing the received other base station in the storage means.
By registering the synchronization information, the above-mentioned claim 2 is provided.
Automatic registration of synchronization information of other base stations.
Can be recorded and other base stations outside the area of the predetermined base station.
Synchronization can be performed efficiently,
Increase in power consumption due to cropping can be suppressed.

According to the fifth aspect of the present invention, a communication
Performs wireless communication with a base station connected to the
Of at least one base station near the communication area of the fixed base station
The synchronization information is stored in the storage unit, and the synchronization information is stored in the storage unit.
Synchronization information matches the synchronization information of the base station currently synchronized
Then, the operation of establishing synchronization with the predetermined base station starts, and
, The radio which stops the synchronization establishment operation with the predetermined base station
In the communication device, the search unit is configured to communicate with the predetermined base station.
Whether synchronization information of other base stations can be received during synchronization establishment
And that synchronization information with another base station was received.
The registration means stores the other received base in the storage means.
Register the synchronization information of the local station.

As a result , synchronization with a predetermined base station is being established.
However, it is possible to automatically register the synchronization information of other base stations.
Synchronization with other base stations outside the area of the specified base station.
Power consumption due to unnecessary synchronization
The increase in force can be suppressed. Also, from public base stations
Transition to a privately owned base station, or from a privately owned base station to a public base
Transfer to a station can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of a wireless communication apparatus according to an embodiment.

FIG. 2 is a flowchart illustrating a process when the power is turned on.

FIG. 3 is a flowchart illustrating a search state setting process.

FIG. 4 is a flowchart for explaining processing during movement.

FIG. 5 is a flowchart illustrating a manual registration process.

FIG. 6 is a schematic diagram for explaining the operation of the wireless communication device according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wireless communication apparatus 11 Antenna 12 High frequency part 13 Modem part 14 TDMA part 15 Speech codec part 16 PCM codec part 17 Amplifier 18 Speaker 19 Microphone 21 Display part 22 Control part 23 ROM 24 RAM 25 Recording / playback circuit 26 Memory 27 Key input part X Crystal oscillator

Claims (5)

(57) [Claims] (1) No communication with a base station connected to the communication network
In a wireless communication device that performs line communication, At least one base station near a communication area of a predetermined base station
Recording means for recording synchronization information of A base that is currently synchronized with the synchronization information recorded in the recording means.
Detecting means for detecting a match with the synchronization information of the local station; When a match is detected by the detection means, a predetermined base station channel
Control to shorten the tunnel search cycle to detect inconsistencies.
Signal, the period of the predetermined base station channel search is extended.
Control means for controlling A wireless communication device comprising: (2) At least one of the storage means
Has adjacent base station input means for inputting base station synchronization information
2. The wireless communication device according to claim 1, wherein: 3. The predetermined base station is a self-operated base station.
The wireless communication device according to claim 1, wherein: 4. The predetermined base station input means according to claim 1, wherein
Receive synchronization information from other base stations while establishing synchronization with a station
Search means for searching whether or not Synchronization information of another base station could be received by this search means
When the received synchronization information of the other base station is stored in the storage means.
Registration means for registering Claims characterized by having
3. The wireless communication device according to 2. (5) No communication with a base station connected to the communication network
Line communication, and at least near the communication area of the predetermined base station.
Also stores the synchronization information of one base station in the storage means,
means Of the base station currently synchronized with the synchronization information stored in
When the synchronization information matches, the synchronization establishment operation with the predetermined base station is performed.
Is started, and if they do not match, the synchronization establishment operation with the predetermined base station is performed.
In the wireless communication device that stops the operation, While establishing synchronization with the predetermined base station, synchronization information of another base station is
Search means for searching whether or not a message can be received; Synchronization information of another base station could be received by this search means
When the received synchronization information of the other base station is stored in the storage means.
Registration means for registering Wireless communication characterized by having
Communication device.