JP2008211628A - Wireless communication method, system and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication method, system and device in which a wireless communication terminal can obtain a call from a base station surely while suppressing power consumption and shortening a response time of the wireless communication terminal. <P>SOLUTION: A base station 11 acquires information indicative of the receiving state of a terminal 12 from the terminal 12, and transmits call termination information to the terminal 12 at a predetermined transmission interval. The terminal 12 performs call termination information receiving operation at a predetermined reception interval. The base station 11 determines whether the terminal 12 has received the call termination information and if the call termination information has not been received by the terminal 12, the base station 11 shortens the transmission interval based on the information indicative of the receiving state of the terminal 12 and transmits broadcast information including the information for shortening the reception interval to the terminal 12. When the terminal 12 has received the broadcast information, the reception interval is shortened and the base station 11 transmits the call termination information at the shortened transmission interval. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radio communication method performed between a base station and a radio communication terminal, a radio communication system including the base station and the radio communication terminal, and a base station and radio communication terminal provided in the radio communication system.

Conventionally, a wireless communication method performed between a base station and a wireless communication terminal is known.
FIG. 6 is an explanatory diagram showing an example in which a base station calls a terminal by a conventional wireless communication method. Here, the multi-session connection when the certificate received from the certificate authority is not used is shown. As shown in FIG. 6, for example, when the base station 1 wants to call a terminal (wireless communication terminal) 2 but a data channel is not connected to the terminal 2, the page information (page) is transmitted to the terminal 2. Is transmitted at regular intervals (page transmission).

The terminal 2 receives the page in synchronization with the page transmission interval of the base station 1 (page reception), thereby recognizing that it is a call from the base station 1, and enters data channel connection sequence control. The base station 1 transmits broadcast information independently of the page and notifies the terminal 2 of the information of the base station 1. The terminal 2 receives the broadcast information at every broadcast information reception interval.
As an example of such a method for the base station 1 to call the terminal 2, there is a "cordless telephone system and an order data management system using this system" (see Patent Document 1).

In this “cordless telephone system and order data management system using this system”, a base station that registers a portable handset with a built-in power supply rather than a base station that registers a handset directly connected to an external power supply By shortening the transmission interval of the general call channel which is a control signal for the slave unit, the time until link establishment is shortened. In addition, by reducing the number of PCHs (Page Channels) received in one superframe of a slave unit with a built-in power supply, compared to a slave unit directly connected to an external power supply, the battery power of a portable slave unit with a built-in power supply is reduced. This reduces the time it takes to establish a link for a handset that is directly connected to an external power supply.
JP-A-11-341563

However, in the conventional "cordless telephone system and order data management system using this system", the transmission interval of the general call channel to the handset is shortened in an environment that is easily affected by radio wave conditions such as a wireless communication terminal. Then, when the slave unit cannot receive the simultaneous call, the slave unit cannot grasp that the call for itself is transmitted and cannot make a connection request to the base station.
FIG. 7 is an explanatory diagram illustrating a case where the terminal has failed to receive a page in FIG. 6. As shown in FIG. 7, even if the base station 1 transmits a page and calls the terminal 2, the terminal 2 fails to receive the page and the page is not received, and the terminal 2 is called from the base station 1. I can not recognize that.

In addition, since the number of PCHs to be received is reduced in order to suppress power consumption in the portable cordless handset, it takes time to connect, and VoIP (Voice over Internet Protocol) incoming calls that require quick response are required. Etc. cannot be supported.
An object of the present invention is to provide a wireless communication method, a wireless communication system, and a wireless communication terminal capable of reliably grasping a call from a base station while reducing response time while suppressing power consumption in the wireless communication terminal. And providing a wireless communication device.

  In order to achieve the above object, a wireless communication method according to the present invention is a wireless communication method in which a first wireless communication device and a second wireless communication device perform wireless communication, wherein the first wireless communication device includes the first wireless communication device. A reception state information acquisition step for acquiring information indicating the reception state of the second wireless communication device from the second wireless communication device; and a second step of transmitting incoming call information to the second wireless communication device at a predetermined transmission interval. 1 incoming call information transmission step, the second wireless communication apparatus performs an incoming call information reception operation step at a predetermined reception interval, and the first wireless communication apparatus comprises: A determination step of determining whether or not the second wireless communication device has received the incoming call information; and if it is determined that the second wireless communication device has not received the incoming call information, the second wireless communication device Information indicating the reception status of the wireless communication device A transmission interval shortening step for shortening the transmission interval, a broadcast information transmission step for transmitting information for shortening the reception interval to the second wireless communication device in broadcast information, When the second wireless communication apparatus receives the broadcast information, the reception interval shortening step for shortening the reception interval, and the first wireless communication apparatus transmits the incoming call information at the shortened transmission interval. And a second incoming call information transmission step.

  In the present invention, in the case where the first wireless communication device performs wireless communication with a plurality of the second wireless communication devices, in the reception state information acquisition step, the first wireless communication device includes the second wireless communication device. Information indicating the reception state of the second wireless communication device and identification information of the second wireless communication device are acquired, and in the notification information transmitting step, the first wireless communication device is connected to the second wireless communication device. The information for shortening the reception interval and the identification information of the second wireless communication device to be shortened for the reception interval of the incoming call information are included in broadcast information and transmitted, and the reception interval shortening step Then, when the second wireless communication apparatus receives the broadcast information, the second wireless communication apparatus is a target for shortening the reception interval of the incoming call information from the identification information included in the broadcast information. Whether or not A step of cross, when subject to shorten the reception interval is the second wireless communication device, preferably includes the steps of: shortening the reception interval.

Further, according to the present invention, the information indicating the reception state of the second wireless communication device is necessary for the second wireless communication device to receive incoming call information transmitted from the first wireless communication device. Information indicating power, wherein the first wireless communication apparatus shortens the transmission interval of the incoming call information based on the information indicating the reception state of the second wireless communication apparatus, and the second wireless communication apparatus It is preferable to shorten the reception interval of the wireless communication device.
In the present invention, it is preferable that the transmission interval shortening step controls the transmission interval based on a priority of a session communicating based on the incoming call information.
In the present invention, when the first wireless communication apparatus and the second wireless communication apparatus are connected via a data channel, the first wireless communication apparatus sets the shortened transmission interval to the predetermined transmission interval. It is preferable that the second wireless communication apparatus returns the shortened reception interval to the predetermined interval.

  The wireless communication system according to the present invention is a wireless communication system in which a first wireless communication device and a second wireless communication device perform wireless communication, wherein the first wireless communication device is connected to the second wireless communication device from the second wireless communication device. Reception status information acquisition means for acquiring information indicating the reception status of the second wireless communication apparatus, and first incoming call information transmission means for transmitting incoming call information to the second wireless communication apparatus at a predetermined transmission interval And the second wireless communication apparatus executes an incoming call information reception operation at a predetermined reception interval; and the first wireless communication apparatus transmits the incoming call information to the second incoming information. Determining means for determining whether or not the second wireless communication apparatus has received, and when determining that the second wireless communication apparatus has not received the incoming call information, the reception state of the second wireless communication apparatus is determined. The transmission interval is shortened based on the information indicated A communication interval shortening unit, a notification information transmitting unit that transmits information for shortening the reception interval to the second wireless communication device in broadcast information, and the second wireless communication device includes the notification information. Receiving interval shortening means for shortening the receiving interval, and second incoming call information transmitting means for the first wireless communication apparatus to transmit the incoming call information at the shortened transmission interval; It is characterized by having.

  Further, the wireless communication device according to the present invention includes: reception state information acquisition means for acquiring information indicating the reception state of the counterpart wireless communication device from the counterpart wireless communication device; and First incoming call information transmitting means for transmitting incoming call information at a predetermined transmission interval; determination means for determining whether the counterpart wireless communication apparatus has received the incoming call information; and the incoming call information , When the other party's wireless communication device is not receiving, based on information indicating the reception state of the other party's wireless communication device, transmission interval shortening means for shortening the transmission interval, Broadcast information transmitting means for transmitting information for shortening the reception interval to the wireless communication device, and second incoming call information transmission for transmitting the incoming call information at the shortened transmission interval Means having It is set to.

  The wireless communication device according to the present invention includes incoming call information receiving means for receiving incoming call information transmitted from a counterpart wireless communication device at a predetermined transmission interval at a predetermined reception interval; And receiving interval shortening means for shortening the reception interval when receiving broadcast information including information for reducing the reception interval of the incoming call information transmitted from the apparatus.

  According to the present invention, the wireless communication terminal can reliably grasp the call from the base station while reducing the response time while suppressing power consumption in the wireless communication terminal.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram showing a wireless communication method according to an embodiment of the present invention. As shown in FIG. 1, a wireless communication system 10 includes a base station (first wireless communication device) 11 and a terminal (wireless communication terminal, second wireless communication device) 12, and the base station 11 and the terminal Wireless communication is performed between the twelve.
The base station 11 transmits page information (page) to the terminal 12 to call the terminal 12 when the terminal 12 and the data channel are not connected. At this time, pages are transmitted from the base station 11 at the page transmission interval x.

The terminal 12 cannot receive a page with respect to page transmission from the base station 11 (no page is received), and can receive the notification information with respect to notification information transmission including session ID group information. it can. That is, the terminal 12 cannot receive a page but can receive broadcast information. This is because the page (PCH: Page Channel) and the broadcast information (BCH) are transmitted using different carriers.
Note that the base station 11 includes the session ID (IDentification) group information corresponding to the required power control level of the terminal information (the power control level in FIG. 1 is 2) regardless of whether the transmitted page is responded or not. Session ID information (the session ID in FIG. 1 is “A”) is set. Here, power control level 1 is α second interval page reception, power control level 2 is β second interval page reception, and power control level 3 is γ second interval page reception.

The power control level is the page reception of the terminal 12,
(1) When the page reception interval is short, the number of processes required for reception by the terminal 12 is large, so that the amount of power required for this reception increases.
(2) When the page reception interval is long, the number of processes required for reception by the terminal 12 is small, so that the amount of power required for this reception is small.
The power control level is set to correspond to (1) means (1). The base station 11 acquires the identification information of the terminal 12 and the power control level information of the terminal 12 when registering the terminal 12 in advance for communication connection. This power control level information includes the amount of power required for page reception per unit time in the terminal 12 and the number of page receptions per unit time (intermittent reception interval).

After setting the session ID information, the base station 11 changes the page transmission interval for session ID: A from x to β.
When receiving the broadcast information from the base station 11, the terminal 12 checks whether or not the session ID of its own terminal is registered at each power control level, and if it is registered, the registered power control level ( The page control interval is changed from x to β in accordance with 2) as the power control level in FIG.

The terminal 12 shortens the page reception interval by checking the session ID group information set for each power control level included in the broadcast information. At this time, the terminal 12 The degree of reduction of the reception interval of the page is stored in advance, and the reception interval may be shortened only by knowing which level corresponds to itself, and the base station 11 determines for each power control level. The degree of reduction of the page reception interval may be acquired together with the session ID group information to shorten the reception interval.
When the terminal 12 can receive the page, the terminal 12 transmits a data channel connection request to the base station 11, and the base station 11 transmits a data channel connection response to the terminal 12 after receiving the data channel connection request. This enables connection of data channels necessary for a call.

The transmission interval and the reception interval at the time of transmitting this page are adjusted by the electric control level information of the terminal 12 and the content of the session, for example, VoIP, etc. Depending on the QoS (Quality of Service) of the session, the terminal arrival In addition to the time, an operation with a short page reception interval is desirable. Therefore, the power control level is designated corresponding to the case where the QoS of the session changes after the session connection.
After the data channel connection is completed, the page transmission interval and the reception interval are returned to the state before the change in both the base station 11 and the terminal 12. That is, the terminal 12 and the base station 11 return the transmission interval and the reception interval to the original cycle at their own judgment when TCH (Traffic Channel) is connected.

FIG. 2 is a block diagram showing a schematic configuration of the wireless communication system of FIG. As shown in FIG. 2, the base station 11 includes a base station control unit 13, a broadcast information transmission unit 14, a page transmission unit 15, a reception state information reception unit 16, and a data channel connection information transmission / reception unit 17. The terminal 12 includes a broadcast information receiving unit 18, a page receiving unit 19, a terminal control unit 20, a reception state information transmitting unit 21, and a data channel connection information transmitting / receiving unit 22.
The base station control unit 13 outputs a session ID and a power control level notification of terminals that need to be called, including the terminal 12, to the broadcast information transmission unit 14, and outputs a page transmission request and page transmission interval change information to the page transmission unit 15, respectively. To do. The broadcast information transmitting unit 14 that has received the session ID and power control level notification outputs the broadcast information including the received session ID and power control level to the broadcast information receiving unit 18 of the terminal 12. The page transmission unit 15 that has received the page transmission request and the page transmission interval change information transmits the page information to the page reception unit 19 of the terminal 12.

  The reception state information reception unit 16 outputs the reception state information from the reception state information transmission unit 21 of the terminal 12 to the base station control unit 13. The data channel connection information transmitting / receiving unit 17 outputs the data channel connection request information to the base station control unit 13 and the data channel connection response information is input from the base station control unit 13. The data channel connection information transmission / reception unit 17 to which the data channel connection response information is input outputs a data channel connection response to the data channel connection information transmission / reception unit 22 of the terminal 12. Further, the data channel connection information transmission / reception unit 17 outputs data channel connection request information to the base station control unit 13.

  The broadcast information receiving unit 18 outputs the session ID and the power control level notification included in the broadcast information to the terminal control unit 20 by receiving the broadcast information from the broadcast information transmitting unit 14. The page reception unit 19 outputs a page information reception notification to the terminal control unit 20 when the page information from the page transmission unit 15 is input. The terminal control unit 20 outputs page reception interval change information to the page reception unit 19 in response to the session ID and the power control level notification input from the notification information reception unit 18. The terminal control unit 20 outputs the transmission request information of the reception state information to the reception state information transmission unit 21.

  The reception state information transmission unit 21 outputs the reception state information to the reception state information reception unit 16 of the base station 11 when the transmission request information of the reception state information is input. The data channel connection information transmitting / receiving unit 22 to which the data channel connection response is input from the data channel connection information transmitting / receiving unit 17 of the base station 11 outputs the data channel connection response information to the terminal control unit 20. The data channel connection information transmitting / receiving unit 22 receives data channel connection request information from the terminal control unit 20. The data channel connection information transmitting / receiving unit 22 to which the data channel connection request information is input outputs the data channel connection request to the data channel connection information transmitting / receiving unit 17 of the base station 11.

  That is, the base station 11 transmits reception state information acquisition means (reception state information receiving unit 16) for acquiring information indicating the reception state of the terminal 12 from the terminal 12, and incoming call information to the terminal 12 at a predetermined transmission interval. The first incoming call information transmitting means (page transmitting section 15), the determining means (base station control section 13) for determining whether the terminal 12 has received the incoming call information, and the terminal 12 receiving the incoming call information. When it is determined that the terminal 12 has not received, the transmission interval shortening means (base station control unit 13) for shortening the transmission interval based on the information indicating the reception state of the terminal 12 and the reception interval of the incoming call information are shortened to the terminal 12. Broadcast information transmission means (broadcast information transmission section 14) for transmitting broadcast information including information to be transmitted; second incoming call information transmission means (page transmission section 15) for transmitting incoming call information at a reduced transmission interval; have.

The terminal 12 receives an incoming call information at a predetermined reception interval (page receiving unit 19), and a reception interval shortening unit (terminal control unit 20) that shortens the reception interval when broadcast information is received. And have.
FIG. 3 is a flowchart showing a flow of connection processing with a terminal in a base station. Here, when establishing communication with the base station 11, the terminal 12 first makes a registration request for the base station 11, and the base station 11 registers the terminal 12 based on the request. As shown in FIG. 3, first, it is determined whether or not the terminal 12 needs to be called (step S101). As a result of the determination, if it is not necessary to call (no), the determination is repeated. If a call is generated by VoIP or the like, and if it is necessary to call (yes), it is determined whether or not a data channel exists with the terminal 12. (Step S102). As a result of the determination, if the data channel exists (yes), the process returns to step S101. If the data channel does not exist (no), it is determined whether or not it is time to transmit the page (step S103).

Next, as a result of the determination in step S103, if it is not the transmission timing (no), the determination is repeated, and if it is the transmission timing (yes), the page is transmitted to the terminal 12 (step S104).
Thereafter, the power control level information required by the terminal 12 is determined from the power control level information acquired at the time of registration (registration), and is changed to a page transmission interval corresponding to the determined power control level (step S105). Then, the power control level information required by the determined terminal 12 and the session ID are set in the broadcast information and transmitted (step S106).

Next, it is determined whether or not a data channel connection request is received from the terminal 12 (step S107). If no data channel connection request is received (no), the process returns to step S103, and the data channel connection request is received (yes) ), A data channel connection response is transmitted to the terminal 12 (step S108), and then the process ends.
FIG. 4 is a flowchart showing a flow of connection processing with a base station in a terminal. As shown in FIG. 4, it is first determined whether or not it is time to receive a page (step S201). As a result of the determination, if it is a reception timing (yes), it is determined whether or not a page has been received (step S202). If a page is received as a result of the determination (yes), a request for data channel connection is made to the base station 11. Is transmitted (step S203), and then the process ends.

On the other hand, if it is not time to receive (no) in step S201, and if no page is received (no) in step S202, it is determined whether it is time to receive broadcast information (step S204). As a result of the determination, if it is a reception timing (yes), broadcast information is received, and it is determined whether or not the own session ID is included in the session ID group information (step S205). As a result of the determination, if the own session ID is included (yes), the page reception interval is changed from the power control level including the own session ID (step S106), and then the process returns to step S201.
On the other hand, if it is not the reception timing (no) in step S204, and if the own session ID is not included (no) in step S205, the process returns to step S201.

FIG. 5 is a sequence diagram showing message exchange between the base station and the terminal. As shown in FIG. 5, page transmission is performed from the base station 11 to the terminal 12, and if not received, page transmission is performed again after a predetermined transmission interval. Thereafter, broadcast information is transmitted from the base station 11 to the terminal 12.
After the broadcast information is transmitted, when the terminal 12 receives the broadcast information, the terminal 12 changes the reception interval of the pages so that the reception interval is different from that of the previous page reception, and the base station 11 Performs page transmission from the base station 11 to the terminal 12 at a transmission interval different from the previous page transmission, and if not received, performs page transmission again at the changed page transmission interval.
As a result of changing the reception interval and the transmission interval, when page transmission is received by the terminal 12, a data channel connection request is transmitted from the terminal 12 to the base station 11. When receiving the data channel connection request, the base station 11 transmits a data channel connection response to the terminal 12.

  That is, between the base station 11 and the terminal 12, the base station 11 acquires a reception state information acquisition step for acquiring information indicating the reception state of the terminal 12 from the terminal 12, and the incoming call information to the terminal 12 at a predetermined transmission interval. A first incoming call information transmission step for transmitting the received information, a received call information receiving step for the terminal 12 to receive the incoming call information at a predetermined reception interval, and whether the terminal 12 has received the incoming call information. A determination step for determining whether or not, and a transmission interval shortening step for shortening a transmission interval based on information indicating a reception state of the terminal 12 when it is determined that the terminal 12 has not received the incoming call information; A broadcast information transmission step of transmitting broadcast information including information for shortening the reception interval of information to the terminal 12, a reception interval shortening step of shortening the reception interval when the terminal 12 receives the broadcast information, and the base station 11 ,in front In shortened transmission interval, via a second incoming call information transmission step of transmitting the incoming call information, the radio communication is performed.

  In the wireless communication method between the base station 11 and the terminal 12 described above, when the base station 11 performs wireless communication with a plurality of terminals 12, in the reception state information acquisition step, the base station 11 receives the reception state of the terminal 12. In the broadcast information transmission step, the base station 11 receives information for shortening the reception interval of the incoming call information to the terminal 12, and a target for shortening the reception interval of the incoming call information. In the reception interval shortening step, when the terminal 12 receives the notification information, the terminal 12 shortens the reception interval of the incoming call information from the identification information. And a step of shortening the reception interval when the target for shortening the reception interval is the terminal 12.

In the wireless communication method between the base station 11 and the terminal 12 described above, the information indicating the reception state of the terminal 12 acquired at the time of wireless connection is used when the terminal 12 receives incoming call information transmitted from the base station 11. The base station 11 shortens the transmission interval of incoming call information and the reception interval of the terminal 12 based on the power required for receiving the information.
In the wireless communication method between the base station 11 and the terminal 12 described above, the transmission interval step further shortens the transmission interval based on the priority of the session that communicates by incoming call.
In the wireless communication method between the base station 11 and the terminal 12 described above, when the base station 11 connects the data channel with the terminal 12, the shortened transmission interval and reception interval are returned to predetermined intervals.

  In this way, when the base station 11 calls the terminal 12, the terminal 12 receives at regular intervals in the same manner as the page, in addition to the control channel called the page (Page) which the terminal 12 receives at regular intervals. The session ID group information of the terminal 12 included in the broadcast information is set for each level of power control, and the page reception count of the terminal 12 is increased in consideration of the page response time and standby time required by the terminal 12.

  That is, when a data channel between the base station 11 and the terminal 12 does not exist and a control channel called a page is used for calling, the broadcast control information notified from the base station 11 to the terminal 12 is set to the required power control level. When the classified session ID group information is set and notified, and the session ID of the terminal 12 matches the session ID group information set in the broadcast information, page reception is performed according to the power control level requested from the base station 11 By adjusting the interval and increasing the number of page reception attempts only at the time of calling from the base station 11 to the terminal 12, the response time of the terminal 12 to the page at the time of calling is reduced as much as possible to improve the responsiveness.

Accordingly, it is possible to reduce the time required for the incoming call or the like of the VoIP in which the time from the call to the response is important while considering the power control of the terminal 12. Further, by shortening the page transmission interval and the reception interval only for a predetermined time until the connection request is made, the response time can be shortened while suppressing the battery consumption of the terminal 12.
Although the present invention has been described with reference to the above-described embodiment, it is not limited to this embodiment. Therefore, what is implemented as a change aspect without deviating from the meaning of the present invention is also included.

It is explanatory drawing which shows the radio | wireless communication method which concerns on one embodiment of this invention. FIG. 2 is a block diagram illustrating a schematic configuration of the wireless communication system in FIG. 1. It is a flowchart which shows the flow of a connection process with the terminal in a base station. It is a flowchart which shows the flow of a connection process with the base station in a terminal. It is a sequence diagram which shows the exchange of the message between a base station and a terminal. It is explanatory drawing which shows an example in case a base station calls a terminal by the conventional wireless communication method. In FIG. 6, it is explanatory drawing which shows the case where the terminal has failed in reception of a page.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wireless communication system 11 Base station 12 Terminal 13 Base station control part 14 Broadcast information transmission part 15 Page transmission part 16 Reception status information reception part 17 Data channel connection information transmission / reception part 18 Broadcast information reception part 19 Page reception part 20 Terminal control part 21 Reception status information transmitter 22 Data channel connection information transmitter / receiver

Claims (8)

In the wireless communication method in which the first wireless communication device and the second wireless communication device perform wireless communication,
The first wireless communication device is
A reception state information acquisition step of acquiring information indicating a reception state of the second wireless communication device from the second wireless communication device;
A first incoming call information transmission step of transmitting incoming call information to the second wireless communication device at a predetermined transmission interval;
The second wireless communication device is
An incoming call information receiving operation step of performing the incoming call information receiving operation at a predetermined reception interval;
The first wireless communication device is
A determination step of determining whether or not the second wireless communication device has received the incoming call information;
When it is determined that the second wireless communication device has not received the incoming call information,
A transmission interval shortening step for shortening the transmission interval based on information indicating a reception state of the second wireless communication device;
A broadcast information transmission step of transmitting information for shortening the reception interval to the second wireless communication device, included in the broadcast information;
The second wireless communication device is
When the broadcast information is received, a reception interval shortening step for shortening the reception interval;
The first wireless communication device is
A second incoming call information transmission step of transmitting the incoming call information at the shortened transmission interval;
A wireless communication method comprising: When the first wireless communication device performs wireless communication with a plurality of the second wireless communication devices,
In the reception status information acquisition step,
The first wireless communication device acquires information indicating a reception state of the second wireless communication device and identification information of the second wireless communication device;
In the broadcast information transmission step,
The first wireless communication device has the information for shortening the reception interval of the second wireless communication device and the second wireless communication device to be shortened the reception interval of the incoming call information. Send the identification information in the broadcast information,
In the reception interval shortening step,
When the second wireless communication device receives the notification information,
Determining from the identification information included in the broadcast information whether the second wireless communication device is a target for shortening the reception interval of the incoming call information;
When the target for shortening the reception interval is the second wireless communication device, the step of shortening the reception interval;
The wireless communication method according to claim 1, further comprising: Information indicating the reception state of the second wireless communication device is:
The second wireless communication apparatus is information indicating power required for receiving the incoming call information transmitted from the first wireless communication apparatus, and the first wireless communication apparatus is configured to receive the second wireless communication apparatus. Based on the information indicating the reception state of the communication device, the transmission interval of the incoming call information is shortened, and the reception interval of the second wireless communication device is shortened.
The wireless communication method according to claim 1 or 2.   The wireless communication method according to any one of claims 1 to 3, wherein the transmission interval shortening step controls the transmission interval based on a priority of a session communicating based on the incoming call information. .   When the first wireless communication device and the second wireless communication device are connected via a data channel, the first wireless communication device returns the shortened transmission interval to the predetermined interval, and The wireless communication method according to claim 1, wherein the second wireless communication apparatus returns the shortened reception interval to the predetermined interval. In a wireless communication system in which a first wireless communication device and a second wireless communication device perform wireless communication,
The first wireless communication device is
Reception state information acquisition means for acquiring information indicating the reception state of the second wireless communication device from the second wireless communication device;
First incoming call information transmitting means for transmitting incoming call information to the second wireless communication device at a predetermined transmission interval;
The second wireless communication device is
Incoming call information receiving means for performing the receiving operation of the incoming call information at a predetermined reception interval;
The first wireless communication device is
Determining means for determining whether the second wireless communication apparatus has received the incoming call information;
When it is determined that the second wireless communication device has not received the incoming call information,
Transmission interval shortening means for shortening the transmission interval based on information indicating a reception state of the second wireless communication device;
Broadcast information transmitting means for transmitting information for shortening the reception interval to the second wireless communication device, including the broadcast information;
The second wireless communication device is
When the broadcast information is received, reception interval shortening means for shortening the reception interval;
The first wireless communication device is
Second incoming call information transmitting means for transmitting the incoming call information at the shortened transmission interval;
A wireless communication system comprising: Reception state information acquisition means for acquiring information indicating the reception state of the counterpart wireless communication device from the counterpart wireless communication device;
First incoming call information transmitting means for transmitting incoming call information to the counterpart wireless communication device at a predetermined transmission interval;
Determining means for determining whether or not the counterpart wireless communication device has received the incoming call information;
When it is determined that the other party's wireless communication device has not received the incoming call information,
Transmission interval shortening means for shortening the transmission interval based on information indicating the reception state of the counterpart wireless communication device;
Information for transmitting the information for shortening the reception interval to the wireless communication device on the other side included in the notification information; and
Second incoming call information transmitting means for transmitting the incoming call information at the shortened transmission interval;
A wireless communication apparatus comprising: Incoming call information receiving means for receiving incoming call information transmitted at a predetermined transmission interval from the counterpart wireless communication device at a predetermined reception interval;
A reception interval shortening means for shortening the reception interval when receiving broadcast information including information for shortening the reception interval of the incoming call information transmitted from the wireless communication device on the other side;
A wireless communication apparatus comprising:

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