JP2002305768A - Wireless communication system, wireless communication method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication system that can smoothly start communication with a small connection time at start of communication and to provide a wireless communication method and a recording medium. SOLUTION: The wireless communication system is configured with a control station that conducts connection to a public communication network and control over a base station and especially sets a time slot to the base station, with a base station making wireless communication adopting the TDMA system with a prescribed mobile station according to a time slot set by the control station, and with mobile stations resident in an area covered by the base station. In the case that communication slots 210-212, 214-216 and control slots 213, 217 are transmitted through a communication line and the communication slots 210-212, 214-216 are selected to be dynamic slots and the communication slots are set to be fixed slots, when-the base station receives a call from the mobile station to which the fixed slot is assigned, the base station assigns the fixed slots 211, 215 without the need for decision processing of the slots to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a radio communication system,
The present invention relates to a wireless communication method and a recording medium storing a program for executing the method, and more particularly to a wireless communication system, a wireless communication method, and a recording medium that optimally and dynamically allocate time slots.

[0002]

2. Description of the Related Art One of the multiple access systems of digital communication is as follows.
Multiple terminals (mobile or fixed station) for one base station
However, there is a TDMA (Time Division Multiple Access) system capable of communicating with each other so that signals do not overlap in time at the same carrier frequency. In order to share a channel (communication path) with a plurality of terminals using this TDMA system, a fixed length of time, which is a basic period of transmission and reception called a frame, is divided into a plurality of time slots, and each terminal has a different time. Slots are used.

A time slot (hereinafter, simply referred to as a slot) has a time length of 625 [μsec] obtained by dividing a frame of 5 [msec] into 8, for example. And a control slot. This frame flows on a channel that is a communication path between the base station and the terminal.

FIG. 11 shows a configuration of a channel transmitted by a conventional radio communication system using the TDMA system. The communication slots 1510 to 1512, 1514 to 15 shown in FIG.
Reference numeral 1516 denotes a slot for transmitting voice or data between the base station and the terminal, and a control slot 1513,1.
Reference numeral 517 denotes a slot for transmitting control information for controlling transmission and reception of voice or data between the base station and the terminal.

There are two types of communication slot allocation methods. One is a fixed allocation method that allocates a specific communication slot so that a specific terminal can occupy and use it. According to this method, since the communication slot to be used is predetermined, there is an advantage that the delay time due to the multiple connection processing can be reduced. The other is
This is a dynamic allocation method in which communication slots are allocated in bursts each time a terminal generates a call. Terminals do not always communicate, so, as in this method, by allocating appropriate communication slots to terminals that start communication, unused communication slots can be reduced. The multiplexing efficiency can be increased in comparison.

[0006]

However, in a wireless communication system employing a dynamic allocation method,
When the base station receives a call transmitted from a terminal, the base station has to perform an allocation process such as searching for and allocating an appropriate communication slot each time, so that there is a problem that a smooth connection cannot be made. . Particularly, in the case of the press talk communication using voice, the time required for the allocation process has caused a delay in the time until the start of communication.

Further, for example, when the terminal is a mobile station such as a mobile phone and the base station to be used changes due to the movement of the terminal, the terminal is not used by the newly used base station to continue the communication. An allocation process of searching for a communication slot and assigning it to a terminal is required. Communication cannot be performed during this allocation processing, and there is a problem that the conversation is interrupted particularly in voice communication.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object a radio communication system, a radio communication method, and a recording medium that can start communication smoothly with a short connection time at the start of communication. It is intended to provide.

[0009]

According to a first aspect of the present invention, there is provided a wireless communication system employing a TDMA system as a multiplexing system. Can be set to a dynamically allocated dynamic slot that can be used by non-specific terminals or a fixedly allocated fixed slot that can be used only by specific terminals; At least one of the time slots constituting a frame is set as a fixed slot.

A wireless communication system according to a second aspect is a wireless communication system employing a TDMA system as a multiplexing system, wherein a time slot forming a frame transmitted in the wireless communication system is a non-specific time slot. It is set as a dynamic slot that can be used by a terminal, and performs communication using an unused time slot in accordance with the use state of the time slot that constitutes the frame.

According to a third aspect of the present invention, there is provided a wireless communication system according to the first or second aspect, wherein an unused dynamic slot is used in accordance with a use state of a time slot set as a dynamic slot. Communication is performed by allocating a fixed time slot as a slot.

[0012] According to a fourth aspect of the present invention, in the wireless communication system according to the first, second, or third aspect, even if all of the time slots set as dynamic slots are in use, the fixed time is used. When a time slot that is temporarily allocated is unused, communication is performed using the time slot.

A wireless communication system according to a fifth aspect of the present invention is the wireless communication system according to the first, third or fourth aspect, further comprising setting means for setting a dynamic slot or a fixed slot for each time slot. .

In a wireless communication system according to a sixth aspect of the present invention, in the wireless communication system according to the fifth aspect, the setting means assigns a fixed assignment to a time slot set as a dynamic slot. What is possible.

According to a seventh aspect of the present invention, in the wireless communication system according to the fifth or sixth aspect, the setting means provided in a terminal owned by a user who uses the wireless communication system comprises: The setting is performed based on the broadcast signal transmitted from the base station of the wireless communication system.

In a wireless communication system according to an eighth aspect, in the wireless communication system according to the third, fourth, fifth, sixth, or seventh aspect, a terminal owned by a user who uses the wireless communication system performs communication. Upon termination, a release signal for changing a fixedly assigned time slot to a dynamic slot is transmitted.

A wireless communication method according to a ninth aspect is a wireless communication method employing a TDMA system as a multiplexing system, wherein a time slot constituting a transmitted frame can be used by a non-specific terminal. It can be set as a dynamic slot or a fixed slot that can be used by a specific terminal. At least one of the time slots constituting a frame is set as a fixed slot.

[0018] The wireless communication method according to claim 10 is
A wireless communication method employing a TDMA method as a multiplexing method, wherein a time slot forming a frame to be transmitted is set as a dynamic slot that can be used by a non-specific terminal, and a time slot forming a frame is used. Communication using an unused time slot is performed according to the situation.

[0019] The wireless communication method according to claim 11 is
11. The wireless communication method according to claim 9, wherein a communication is performed by fixedly allocating a time slot that is an unused dynamic slot according to a use state of a time slot set as a dynamic slot. It is.

Further, according to a twelfth aspect of the present invention, there is provided a wireless communication method comprising:
In the wireless communication method according to claim 9, 10 or 11, even if all the time slots set as dynamic slots are in use, when the fixedly assigned time slots are unused, Communication is performed using the time slot.

Further, the computer-readable recording medium and information according to claim 13 are the following.
It is recorded as a program for causing a computer to execute the wireless communication method described in 10, 11, or 12.

In the wireless communication system according to the first aspect of the present invention, the wireless communication method according to the ninth aspect, and the recording medium and information according to the thirteenth aspect, a time slot constituting a frame multiplexed by the TDMA system is It can be set to a dynamic slot that can be used by a non-specific terminal or a fixed slot that can be used only by a specific terminal, and at least one of the time slots constituting a frame is set to a fixed slot.

Therefore, when a call is originated from a terminal capable of using the time slot set in the fixed slot, it is not necessary to search for a time slot to be used, so that communication can be started immediately. . For example, a waiting time until a communication path is established for a terminal to transmit a call to a base station and communicate with a desired terminal, or a waiting time until a new communication path is established when a base station to be used changes. Can be shortened. In particular, in the case of voice communication, the time during which communication is interrupted can be shortened, so that a communication service can be provided without causing the user to feel uncomfortable.

A wireless communication system according to claim 2,
In the wireless communication method according to the tenth aspect and the recording medium and the information according to the thirteenth aspect, a time slot configuring a frame multiplexed by the TDMA method is set as a dynamic slot that can be used by a non-specific terminal. In addition, communication using an unused time slot is performed according to the use state of the time slot constituting the frame. In particular,
In the wireless communication system according to the third aspect, the wireless communication method according to the eleventh aspect, and the recording medium and the information according to the thirteenth aspect, according to the use state of the time slot set as the dynamic slot, an unused mobile station is used. Communication is performed by allocating a fixed time slot as a target slot.

Therefore, the operator of the radio communication system does not need to be aware of the determination and setting of the use / unuse of the time slot, and the terminal to which the time slot is not allocated in advance can start the communication relatively smoothly. it can.

A wireless communication system according to claim 4,
In the wireless communication method according to the twelfth aspect and the recording medium and the information according to the thirteenth aspect, even if all the time slots set as the dynamic slots are in use, the fixedly assigned time slots are not used. At the time of use, communication is performed using the time slot. Therefore, even a fixedly assigned time slot can be utilized flexibly and efficiently.

[0027] In the wireless communication system according to claim 5, the setting means sets a dynamic slot or a fixed slot for each time slot. In particular, in the wireless communication system according to the sixth aspect, it is desirable that the setting means can make a fixed assignment to a time slot set as a dynamic slot. Further, in the wireless communication system according to claim 7, the setting means provided in the terminal owned by the user using the wireless communication system performs the setting based on the broadcast signal transmitted from the base station of the wireless communication system. It is desirable to do.

Further, in the wireless communication system according to the eighth aspect, the terminal owned by the user using the wireless communication system changes the fixedly assigned time slot to a dynamic slot when terminating the communication. It is desirable to send a release signal.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a wireless communication system and a wireless communication method according to the present invention will be described below in detail with reference to the drawings. In the description of each embodiment, a wireless communication system and a wireless communication method according to the present invention will be described in detail, but a recording medium and information according to the present invention will be described with reference to a recording medium storing a program for executing the wireless communication method. Since it is a medium and information, the description is included in the following description of the wireless communication method.

A radio communication system and a radio communication method according to the embodiments described below use a TDM as a multiple access system.
A (Time Division Multiple Access)
s) The method employs a method in which a plurality of terminals communicate with one base station at the same carrier frequency so that signals do not overlap in time. In order to share a channel (communication path) among a plurality of terminals using the TDMA method, a fixed length of time, which is a basic period of transmission and reception called a frame, is divided into a plurality of time slots and each terminal has a different time. Slots are used.

FIG. 1 is a configuration diagram showing a wireless communication system according to one embodiment of the present invention. In FIG. 1, a wireless communication system according to the present embodiment includes a control station 100 and a base station 1.
01 and the mobile station 102 corresponding to the terminal in the claims.
It is comprised including. First, the control station 100 performs connection to a public communication network and control of the base station 101. In particular, the control station 100 sets a time slot for the base station 101.

The base station 101 performs wireless communication with a predetermined mobile station in a time slot set by the control station 100, and has a TDMA wireless unit (not shown). Further, the mobile station 102
Is a mobile station, such as a mobile phone or a PHS, within the area covered by the mobile station, and has a wireless unit (not shown) for performing wireless communication with the base station 101 by the TDMA method. The base station 101 and the mobile station 102 transmit and receive voice or data using predetermined time slots, respectively. Note that a fixed station capable of performing wireless communication may be used instead of the mobile station 102.

In the wireless communication system having the above-described components, a call is generated from the mobile station 102 within the area covered by the base station 101, and when the base station 101 receives the call, the base station 101 A suitable communication slot for performing communication is searched for and determined, and information on the determined communication slot is transmitted to the mobile station that generated the call. After the mobile station receives this information, the mobile station and the base station 101 start transmitting or receiving voice or data.

Next, the format of a channel used in the wireless communication system of the present embodiment will be described with reference to FIG. The figure shows only two frames in the channel, one frame is composed of three communication slots for transmitting voice or data between the base station 101 and the mobile station 102, and voice or data in the base station 101 and the mobile station 102. And a control slot for transmitting control information for controlling transmission and reception of data. Accordingly, in FIG. 2, frame 1 is composed of communication slots 110 to 112 and control slot 113, and frame 2 is composed of communication frames 114 to 116 and control frame 117.

The communication slots 110 to 112, 1
Reference numerals 14 to 116 denote fixed time slots (hereinafter, referred to as fixed slots) which are allocated in advance so as to be occupied by a specific mobile station or dynamic time slots (hereinafter, referred to as bursts) which are allocated in bursts each time the mobile station generates a call. , Dynamic slots). Further, even a time slot set as a dynamic slot can be set as a specific slot selected under certain conditions. Such a setting for the communication slot is instructed by the control station 100 and stored in the base station 101.

Hereinafter, embodiments of the channel according to the form of the communication slot will be described. (First Embodiment) In the first embodiment, as shown in FIG. 3, reference numerals 210 to 212 and 214 to 216 are set as communication slots, and reference numerals 213 and 217 are set as control slots. . In addition, the communication slot 21
1 and 215 are set as fixed slots, and communication slots 210, 212, 214 and 216 are set as dynamic slots. Communication slot 21 which is a fixed slot
Reference numerals 1 and 215 are assigned in advance for communication of a predetermined mobile station.

Therefore, according to the present embodiment, even if a call is received from a mobile station to which communication slots 211 and 215 are assigned, there is no need to search for a communication slot to be used. A smooth connection with the base station 101 can be performed. Therefore, communication can be started promptly, and communication can be resumed with a short interruption time even when a base station changes and a new communication path must be established. In particular, in the case of voice communication, a communication service can be provided without making the user feel uncomfortable by shortening the time during which communication is interrupted.

(Second Embodiment) In the second embodiment, as shown in FIG. 4, reference numerals 310 to 312 and 314 to 316 are set as communication slots, and reference numerals 313 and 317 are set.
Are set as control slots. The communication slots 310, 311, 314, and 315 are set as fixed slots, and the communication slots 312 and 316 are set as dynamic slots. Therefore, according to the present embodiment, a communication slot as a fixed slot can be set in a plurality of mobile stations.

(Third Embodiment) In the third embodiment, as shown in FIG. 5, reference numerals 410 to 412 and 414 to 416 are set as communication slots, and reference numerals 413 and 417 are set.
Are set as control slots. The communication slots 410 to 412 and 414 to 416 are set as dynamic slots.
12,415,416 are in use. At this time, when a call is newly generated from a mobile station within the area covered by the base station 101, the base station 101 determines an unused communication slot from frame 1, for example. At this time, since the communication frame 410 is not used, the communication frame 414 and subsequent frames of the frame 2 are fixedly allocated to the mobile station.

Therefore, according to the present embodiment, an unused communication slot can be automatically assigned to a mobile station that has newly generated a call. There is no need to be aware of the use / unused judgment and setting. Note that the base station 101 of the present embodiment has a channel state management unit (not shown) that manages the state of the channel.

(Fourth Embodiment) In the fourth embodiment, as shown in FIG. 6, reference numerals 510 to 512 and 514 to 516 are set as communication slots, and reference numerals 513 and 517 are set.
Are set as control slots. Although the communication slots 510 to 512 and 514 to 516 are set as dynamic slots, the communication slots 510 and 5
14 are used, and the communication slots 511 and 514 are used as fixed slots which are fixedly allocated. The specific slot is a slot selected under a certain condition, and is fixedly used after being selected.

In this embodiment, when a call is newly generated from a mobile station within the area covered by the base station 101, the base station 101 determines an unused communication slot from frame 1, for example. At this time, the communication frame 51
2 is unused, so the communication slot 5 of frame 2
16 and later are assigned to the mobile station as specific slots. Therefore, according to the present embodiment, an unused communication slot can be flexibly allocated to a mobile station that has newly generated a call in accordance with the use state of a dynamic slot. Therefore, even a mobile station to which a communication slot is not allocated in advance can be connected relatively smoothly. In addition,
Similarly to the third embodiment, the base station 101 of the present embodiment also has a channel state management unit (not shown) for managing a channel state.

(Fifth Embodiment) In the fifth embodiment, as shown in FIG. 7, reference numerals 610 to 612 and 614 to 616 are set as communication slots, and reference numerals 613 and 617 are set.
Are set as control slots. The communication slots 610 to 612 and 614 to 616 are set as dynamic slots.
Is set as a specific slot for mobile station A. In the present embodiment, the communication slot 610 is allocated as a specific slot but is not used, and other communication slots are being used, so that a call from the mobile station B within the area covered by the base station 101 is made. Is newly generated, the communication slot 614 is fixedly allocated as the specific slot for the mobile station B in the frame 2.

Therefore, according to the present embodiment, if a specific slot is not used, the slot can be assigned to a mobile station that has newly generated a call, so that the communication slot can be flexibly and efficiently used. Can be used. Note that the base station 101 of this embodiment also includes a channel state management unit (not shown) that manages the state of the channel, as in the third embodiment.

(Sixth Embodiment) In the sixth embodiment, as shown in FIG. 8, reference numerals 710 to 712 and 714 to 716 are set as communication slots, and reference numerals 713 and 717 are set.
Are set as control slots. The communication slots 710 to 712 and 714 to 716 are set as dynamic slots.
Reference numeral 14 denotes a specific slot allocated to the mobile station A, which is used. In the present embodiment, the communication slot 71
2 is allocated as a specific slot allocated to the mobile station B, but is not used, and other communication slots are being used. Therefore, a call is received from the mobile station C in the area covered by the base station 101. When newly generated, frame 2
In, the communication frame 716 is fixedly allocated as a specific slot for the mobile station C.

Therefore, according to the present embodiment, similarly to the fifth embodiment, if a specific slot is not used, the slot can be assigned to a mobile station that newly generated a call, so that communication can be performed. Slots can be used flexibly and efficiently. Note that the base station 101 of the present embodiment also
As in the third embodiment, a channel state management unit (not shown) for managing a channel state is provided.

As described above, the communication slots used in the wireless communication system of the present embodiment are roughly divided into either dynamic slots or fixed slots.
As a component for storing this setting, a hardware switch 103 as shown in FIG. 9 may be provided in all of the control station 100, the base station 101, and the mobile station 102. The hardware switch 103 sets which communication slot is to be a fixed slot, and has contacts 1 to n as many as the number of settable communication slots. The contacts 1 to n of the hardware switch 103 correspond to the name and number of the slot or a combination of the frequency number and the slot number.

As shown in FIG. 10, a memory 104 may be provided in place of the hardware switch 103. The memory 104 stores information about communication slots that are fixedly assigned, and the communication slots are set as fixed slots or dynamic slots based on information read from the memory 104. When there are a plurality of fixed slots for each base station, a list in which the base station information and the slot information correspond to each other is stored in the memory 104, and the mobile station can be selected using the list. Since it does not take much time to determine the communication slot to be used, communication can be started without delay.

Further, a control unit 105 may be provided for controlling the hardware switch 103 or the memory 104. For example, the control unit 105 of the wireless station 102
Is based on the broadcast signal transmitted from the base station 101,
The setting using the hardware 103 or the storage in the memory 104 is controlled. The broadcast signal includes an ID number, a slot number, a frequency number, and the like.
05 automatically allocates one or more fixed slots based on the information. Note that the ID number is ID information of a mobile station performing communication in a certain slot,
This is ID information of the base station 101 itself.

In the above-described setting of the communication slot using the hardware switch 103 or the memory 104 and the control unit 105, manual setting may be performed instead of automatic setting using a notification signal or the like. it can. For example, it is designed so that the setting change of the hardware switch 103 can be performed manually,
Is displayed on a display unit (not shown) and is designed to be selectable by a user, thereby enabling manual setting. At this time, in order to enable manual setting, a touch panel having both a display unit and a selection unit may be provided.

When the mobile station 102 is performing communication using a fixed slot, the mobile station 102 dynamically changes the time slot (specific slot) in use that is fixedly allocated and used when ending the communication. A release signal for returning to the slot may be transmitted to the base station 101. Upon receiving this release signal, the base station 101 changes the setting of the used time slot to a dynamic slot.

Press talk communication can also be performed using a fixedly assigned communication slot. Further, mobile stations located close to each other may directly communicate with each other using fixed slots. At this time, the control slot includes a frame synchronization pattern for synchronizing frames.

[0053]

As described above, according to the wireless communication system, wireless communication method and recording medium of the present invention, TD
A time slot constituting a frame multiplexed by the MA scheme can be set to a dynamic slot that can be used by a non-specific terminal or a fixed slot that can be used only by a specific terminal. At least one of them is set as a fixed slot.

Therefore, when a call is originated from a terminal capable of using the time slot set in the fixed slot, it is not necessary to search for a time slot to be used, so that communication can be started immediately. . For example, a waiting time until a communication path is established for a terminal to transmit a call to a base station and communicate with a desired terminal, or a waiting time until a new communication path is established when a base station to be used changes. Can be shortened. In particular, in the case of voice communication, the time during which communication is interrupted can be shortened, so that a communication service can be provided without causing the user to feel uncomfortable.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a wireless communication system according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a format of a frame used in the wireless communication system according to the first embodiment.

FIG. 3 is an explanatory diagram illustrating a format according to a first example of a channel used in the wireless communication system according to the first embodiment;

FIG. 4 is an explanatory diagram showing a format according to a second example of a channel used in the wireless communication system of the first embodiment.

FIG. 5 is an explanatory diagram illustrating a format according to a third example of a channel used in the wireless communication system of the first embodiment.

FIG. 6 is an explanatory diagram showing a format according to a fourth example of a channel used in the wireless communication system of the first embodiment.

FIG. 7 is an explanatory diagram showing a format according to a fifth example of a channel used in the wireless communication system of the first embodiment.

FIG. 8 is an explanatory diagram showing a format according to a sixth example of the channel used in the wireless communication system of the first embodiment.

FIG. 9 is a block diagram illustrating a wireless communication system including a hardware switch.

FIG. 10 is a block diagram illustrating a wireless communication system including a memory.

FIG. 11 is an explanatory diagram showing a frame format used in a conventional wireless communication system using the TDMA system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 control station 101 base station 102 mobile station 103 hardware switch 104 memory 105 control unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideto Sato 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. 4-3-1, Matsushita Communication Industrial Co., Ltd. F-term (reference) 5K028 AA11 BB06 CC05 DD01 DD02 HH02 LL02 5K067 AA15 CC04 EE02 EE71 JJ11 KK13 KK15

Claims (13)

[Claims] 1. A wireless communication system employing a TDMA system as a multiplexing system, wherein a time slot constituting a frame transmitted in the wireless communication system is dynamically allocated to be used by a non-specific terminal. It can be set to a dynamic slot or a fixed slot that is fixedly assigned and can be used only by a specific terminal. At least one of the time slots constituting a frame can be set.
A wireless communication system, wherein one of them is set as a fixed slot. 2. A wireless communication system employing a TDMA system as a multiplexing system, wherein a time slot constituting a frame transmitted in the wireless communication system is set as a dynamic slot that can be used by a non-specific terminal. A wireless communication system characterized by performing communication using an unused time slot according to a use state of a time slot constituting a frame. 3. The communication according to claim 1, wherein a time slot that is an unused dynamic slot is fixedly allocated according to a use state of a time slot set as a dynamic slot. 3. The wireless communication system according to 2. 4. Even when all the time slots set as dynamic slots are in use, if the fixedly assigned time slots are not used, communication is performed using the time slots. The wireless communication system according to claim 1, 2 or 3, wherein 5. The wireless communication system according to claim 1, further comprising setting means for setting a dynamic slot or a fixed slot for each time slot. 6. The radio communication system according to claim 5, wherein said setting means is capable of fixedly assigning a time slot set as a dynamic slot. 7. The setting means provided in a terminal owned by a user using the wireless communication system performs setting based on a broadcast signal transmitted from a base station of the wireless communication system. The wireless communication system according to claim 5. 8. A terminal owned by a user using the wireless communication system transmits a release signal for changing a fixedly assigned time slot to a dynamic slot when terminating communication. The wireless communication system according to claim 3, 4, 5, 6, or 7. 9. A wireless communication method employing a TDMA method as a multiplexing method, wherein a time slot forming a frame to be transmitted is a dynamic slot that can be used by a non-specific terminal or a time slot that is used by a specific terminal. It can be set as a fixed slot to obtain, and at least one of the time slots constituting the frame is set.
A wireless communication method comprising setting one of the slots to a fixed slot. 10. A wireless communication method employing a TDMA method as a multiplexing method, wherein a time slot forming a frame to be transmitted is set as a dynamic slot that can be used by a non-specific terminal, and a frame is formed. A wireless communication method characterized by performing communication using an unused time slot in accordance with the use state of the time slot to be used. 11. The communication according to claim 9, wherein a time slot that is an unused dynamic slot is fixedly allocated according to a use state of a time slot set as a dynamic slot. A wireless communication method according to claim 10. 12. Even when all time slots set as dynamic slots are in use, if a fixedly assigned time slot is unused, communication is performed using the time slot. The wireless communication method according to claim 9, 10 or 11, wherein: 13. A computer-readable recording medium which records a program for causing a computer to execute the wireless communication method according to claim 9, 10, 11 or 12, and information.