JP3022515B1 - Wireless communication system and wireless communication method - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To perform communication of a multilink access method between a simple master unit having only two wireless channels and a plurality of slave units, and to enable outgoing / incoming call control from another slave unit. SOLUTION: The simple parent device 1 and the child device 2 are 64
When performing kbps high-speed data communication,
Monitors the validity of the transmission / reception data of the wireless line, and when invalid data is detected for a certain period of time and there is no valid data to be transmitted from the handset 2, the associated control channel in the communication slot of the wireless channel 1 is used, The wireless channel 1 is disconnected. At this time, the handset 2 manages the data on the wireless channel 1 side in a simulated manner so as not to lose synchronization, and holds the data frame together with the data received with the wireless channel 2. In addition, the simple master unit 1 generates data for two wireless channels in a pseudo manner by the data frame generation unit 106 and transmits the data to the ISDN line so that synchronization is not lost due to the loss of transmission data to the ISDN line. The simple master unit 1 transmits a control channel using this empty channel, and enables transmission and reception to other slave units.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system, and more particularly, to a wireless communication system and method capable of realizing a wireless band on demand system in a multi-channel access system.

[0002]

2. Description of the Related Art As a cordless system, a digital cordless system using a simple portable telephone (personal handy phone system, PHS) is rapidly spreading. In such a system, a mobile unit, which is a mobile station, passes through a self-main unit, which is a self-operated base station installed in a home or a company, and a public base unit, which is a public base station installed outdoors or the like. 32 kbps data communication is realized. In addition, a high-speed data communication of 64 kbps is possible as a multi-channel access method using two wireless channels between a master unit and a slave unit having two wireless channels (Japanese Patent Laid-Open No. 9-289684).

[0003]

However, 64k
When high-speed data communication at bps is performed, two radio channels are used at the same time between the parent device and the child device. Therefore, in the simple parent device having only two radio channels, the radio for the radio control channel is used. Channels are gone,
Until the 64 kbps high-speed data communication is completed, there is a problem that it is not possible to make outgoing / incoming calls from other slave units whose location is registered in the simple master unit.

(Object of the Invention) It is an object of the present invention to improve the transmission efficiency in communication between a simple master unit having two wireless channels and a plurality of slave units by a multi-channel access method. It is to provide a system and a method.

[0005] Another object of the present invention is to provide a simple master unit whose position is registered in the simple master unit even when a high-speed data communication is performed by a multi-channel access method between a simple master unit having only two radio channels and a slave unit. The present invention provides a wireless communication system and a method capable of making and receiving calls to another slave unit.

Another object of the present invention is to provide a wireless communication system and method for a simple master station and a slave unit that can realize a wireless band-on-demand system.

[0007]

SUMMARY OF THE INVENTION A simplified master station of a wireless communication system according to the present invention is connected to an ISDN line and performs data communication of a multi-channel access system using a plurality of slave units and two wireless channels. ISDN that exchanges data with the ISDN line
A line interface unit, a channel codec unit for allocating a communication channel to a time slot in a wireless line, and disassembling and assembling a wireless frame having a control channel and a communication channel, and a wireless interface unit for transmitting and receiving data via the wireless line. An invalid data detecting unit for detecting whether the transmitted / received data via the wireless line is valid data or invalid data; and, when the invalid data detecting unit detects the transmitted / received data as invalid data, wirelessly communicates with the slave unit during data transmission / reception. An instruction to disconnect one channel is issued, and the ISDN
A data frame generation unit for generating and transmitting a pseudo data frame for a line instead of the data frame decomposed by the channel codec unit.

[0008] The slave unit of the wireless communication system of the present invention is a slave unit of a wireless communication system for performing data communication of a multi-channel access method using two wireless channels with a simple master unit connected to an ISDN line. A wireless interface for transmitting and receiving data to and from the simple master unit via a wireless line, and a channel codec unit for allocating a communication channel to a time slot in the wireless line, and disassembling and assembling a wireless frame having a control channel and a communication channel. When generating and disassembling a data frame for transmitting and receiving to and from an ISDN line via the simple master unit and disconnecting the wireless one channel in response to the wireless one channel disconnection instruction from the simple master station, A data frame generation / decomposition unit that generates data frames and maintains synchronization, And a data interface for force.

Further, a wireless communication system according to the present invention comprises the simple master unit and the slave unit, and the simple master unit and the slave unit use a multi-channel access scheme of 64 k in a wireless line.
bps high-speed data communication is performed, and when the invalid data detection unit detects invalid data, the simple master unit disconnects one wireless channel and uses the data frame as a data frame so as not to cause loss of synchronization due to lack of transmission / reception data. The pseudo-management of the data on the disconnected wireless channel side, the generation of a pseudo-data frame together with the transmission / reception data with the non-disconnected wireless channel side realizes pseudo 64 kbps high-speed data communication. .

[0010] The wireless communication method according to the present invention is a wireless communication method in which a simple master unit and a plurality of slave units perform high-speed data communication by a multi-channel access method using two wireless channels. It monitors whether data transmitted / received via the wireless line is valid or invalid, and when invalid data is detected for a certain period of time, the wireless device uses one of the two wireless channels used in the communication slot of the wireless one channel. When a disconnection request for one wireless channel is made by the associated control channel and disconnection permission is received from the slave unit, the wireless one channel is disconnected, and data for two wireless channels is generated in a pseudo manner to the ISDN line. By transmitting, a free channel is created and a control channel is transmitted to enable control of outgoing / incoming requests to slave units other than the slave unit,
In response to a request for disconnecting one wireless channel from the simple master station,
When there is no valid data to be transmitted to the ISDN line via the simple master unit, the simple master station is notified of permission for disconnection of the wireless one channel using the associated control channel in the communication slot of the wireless one channel, and the wireless one channel is disconnected. In addition, data of one wireless channel is pseudo-managed, and a data frame is held together with data received by another wireless channel.

In the wireless communication method, when there is an outgoing / incoming / outgoing request to a slave other than the slave, data communication with the slave is switched from pseudo 64 kbps high-speed data communication to 32 kbps data communication. In the case where there is no outgoing / incoming / outgoing request to a handset other than the handset, a wireless band-on-demand that allows data communication with the handset to return from pseudo 64 kbps high-speed data communication to 64 kbps high-speed data communication is enabled.

More specifically, the system has a main control unit (101 in FIG. 1) which performs main control of the simple master unit (1 in FIG. 1) as the simple master unit (1 in FIG. 1) of the wireless communication system. When,
An ISDN line interface unit (102 in FIG. 1) for exchanging data with the ISDN line, and a channel codec unit (102) for allocating a communication channel to a time slot in a wireless line and disassembling and assembling a wireless frame of a control channel and a communication channel. 1), a wireless interface unit (104 in FIG. 1) that receives data transmitted via a wireless line and transmits data via a wireless line, and data transmitted / received via a wireless line. An invalid data detection unit (105 in FIG. 1) for detecting whether the data is valid data or invalid data, and the invalid data detection unit (1 in FIG. 1)
05) If the transmitted / received data is detected as invalid data,
A data frame generation unit (FIG. 1) for generating and transmitting a pseudo data frame instead of the data frame decomposed by the channel codec unit (103 in FIG. 1) for the ISDN line via the ISDN line interface (102 in FIG. 1). 1) 106).

As a slave unit (2 in FIG. 1) of the wireless communication system, a main control unit (201 in FIG. 1) for controlling the main unit of the slave unit (2 in FIG. 1) is connected to the simple unit via a wireless line. A wireless interface (202 in FIG. 1) for receiving data from the master unit (1 in FIG. 1) and transmitting data to the simplified master unit (1 in FIG. 1) via a wireless line; A channel codec unit (203 in FIG. 1) for decomposing and assembling radio frames of a control channel and a communication channel, and a data frame received from the simple master unit (1 in FIG. 1) via an ISDN line. And a data frame generation / decomposition unit (204 in FIG. 1) for generating a data frame to be transmitted to the ISDN line via the simple master unit (1 in FIG. 1). Data interface (2 in Figure 1
05).

(Operation) The simple master unit and the slave unit perform 64 kbps high-speed data communication by the multi-channel access method.
The simple master unit constantly monitors the validity of the data transmitted and received via the wireless line, and when invalid data is detected for a certain period of time, notifies the slave unit to the wireless channel 1 of the two wireless channels in use. A request for disconnecting the wireless channel 1 is made on the associated control channel in the communication slot. Upon receiving the wireless channel 1 disconnection request, the slave unit receives an ISD through the simple master unit.
If there is no valid data to be transmitted to the N-line, the simple master unit is notified of the permission of disconnection of the wireless channel 1 by the associated control channel in the communication slot of the wireless channel 1 which has received the channel disconnection request. After this notification, the slave unit disconnects the wireless channel 1 and manages the data on the wireless channel 1 side in a simulated manner so as not to cause loss of synchronization due to the loss of the received data on the wireless channel 1. The data frame is held together with the received data.

The simplified master unit having received the permission to disconnect the wireless channel 1 disconnects the wireless channel 1 so as to prevent loss of synchronization due to loss of transmission data to the ISDN line due to the disconnection of the wireless channel 1. Data for two channels is generated in a pseudo manner and transmitted to the ISDN line via the ISDN line interface unit.

By performing the above-described control between the simple master unit and the slave unit, one channel of wireless communication can be performed while maintaining 64 kbps high-speed data communication without causing loss of synchronization between the simple master unit, the slave unit, and the ISDN line. The simple master unit transmits a control channel using the empty channel, and can control incoming and outgoing calls to other slave units.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Description of Configuration) Next, an embodiment of a wireless communication system and a wireless communication method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a wireless communication system according to the present embodiment. FIG.
In this embodiment, a wireless communication system includes a simple master unit (1) connected to an ISDN line and a slave unit (2) connected to the simple master station (1) by two wireless channels. It is composed of

The simple master device of the present embodiment is used as a simple master device (1) of a wireless communication system.
A main control unit (101) for controlling the main control of the ISDN line, an ISDN line interface unit (102) for exchanging data with the ISDN line, a communication channel assignment to a time slot in a radio line, and a radio frame of a control channel and a communication channel. A channel codec unit (103) for disassembling and assembling the data; a wireless interface unit (104) for receiving data transmitted via a wireless line and transmitting data via the wireless line; An invalid data detecting unit (105) for detecting whether the data to be transmitted and received is valid data or invalid data; and, when the invalid data detecting unit (105) detects the transmitted / received data as invalid data, the ISDN line interface (102). The channel codec (103) decomposes the ISDN line via Data frame generating unit that generates and transmits a pseudo data frame instead of the data frame and a (106).

Further, the slave unit of the present embodiment, as the slave unit (2) of the wireless communication system, communicates with the main control unit (201) which performs the main control of the slave unit (2) via the wireless line. A wireless interface (202) for receiving data from the master unit (1) and transmitting data to the simple master unit (1) via a wireless line; a communication channel assignment to a time slot in the wireless line, a control channel, A channel codec unit (203) for disassembling and assembling a radio frame of a communication channel; disassembling a data frame received from the simple master unit (1) via an ISDN line; and ISDN via a simple master unit (1) Data frame generation / decomposition unit (204) for generating a data frame to be transmitted to the line
And a data interface (205) for inputting and outputting digital signals.

(Explanation of Operation) Next, the operation of the radio communication system according to the present embodiment will be described with reference to the drawings.
FIG. 2 is a flowchart showing the operation of the wireless band on demand system of the wireless communication system according to the present embodiment shown in FIG.

First, the simple master unit (1) and the slave unit (2) of the present wireless communication system use two wireless channels via an ISDN line and employ a multi-channel access method.
kbps high-speed data communication (S1)
01, S201).

In the simple master unit (1), the invalid data detecting unit (105) constantly monitors whether data transmitted / received via the wireless line is valid data or invalid data (S10).
2).

At this time, if invalid data is detected for a certain period of time in the simple master station (1), the simple master unit (1) sends a signal to the slave unit (2) of the wireless 2 channel in use. A wireless channel 1 disconnection request for requesting disconnection of the wireless channel 1 is performed on the associated control channel in the communication slot on the wireless channel 1 side (S103).

On the other hand, the slave unit (2) constantly monitors whether or not there is the wireless channel 1 disconnection request from the simple master station (1) during high-speed data communication at 64 kbps ( In step S202, when the wireless channel 1 disconnection request is received, it is determined whether there is valid data to be transmitted to the ISDN line via the simple master unit (1) (S20).
3).

When the slave unit (2) receives the wireless channel 1 disconnection request, if there is valid data to be transmitted, the wireless channel 1 refuses to disconnect the wireless channel 1 to the simple master unit (1). A disconnection rejection is transmitted, and the simple master unit (1) and the slave unit (2) are connected to each other via the
bps high-speed data communication is continued (S104, 20)
4).

When the slave unit (2) receives the wireless channel 1 disconnection request and there is no valid data to be transmitted, the slave unit (2) transmits to the simple master unit (1) the wireless channel that has received the channel disconnection request. A wireless channel 1 disconnection permission for permitting disconnection of the wireless channel 1 is notified by an associated control channel in one communication slot (S205).

After the notification, the slave unit (2) disconnects the wireless channel 1 (S206). At this time, the slave unit (2) generates data on the wireless channel 1 side in a pseudo manner by the data frame generation / decomposition unit (204) so as to prevent loss of synchronization due to the loss of data received from the wireless channel 1. And hold the data frame together with the data received from the wireless channel 2,
Pseudo 64 kbps high-speed data communication ("pseudo 64 kbps
ps high-speed data communication ”) (S20).
7).

Next, upon receiving the permission to disconnect the wireless channel 1 (yes in S104), the simple master unit (1) disconnects the wireless channel 1 (S105), and transmits to the ISDN line due to the disconnection of the wireless channel 1. In order to prevent loss of synchronization due to the loss of data, the data frame generation unit (106) generates data for two radio channels in a pseudo manner, and the ISDN line interface unit (10
The data is transmitted to the ISDN line via 2) to realize pseudo 64 kbps high-speed data communication (S106).

Thereafter, the simple master unit (1) generates a control channel in the channel codec unit (103) and uses the wireless channel 1 which has been cut off by the above control and becomes an empty channel via the wireless interface unit (104). Then, the control channel is transmitted (S107).

The control channel is a channel for performing a handshake required for starting communication between the simple master and the slave, and the simple master (1) transmits the control channel. Monitoring whether there is an outgoing / incoming / outgoing request for a slave other than the slave (2) (S1).
08).

Here, when there is an outgoing / incoming call request from a handset other than the handset (2), the simple master unit (1) holds a data frame and realizes a pseudo 64 kbps high-speed data communication (S207). 3) Data communication of the slave unit (2)
Control for switching to 2 kbps data communication (wireless BOD, wireless band on demand) is performed. For this reason, the simple master unit (1) sends a BOD to the slave unit (2) through the control channel.
The request is notified (S109). Thereafter, the simple master unit (1) performs data communication with the slave unit (2) by 32 kbp.
Switch to s data communication, and start 32 kbps data communication via the ISDN line interface (102) (S110).

On the other hand, the slave unit (2) realizing the pseudo 64 kbps high-speed data communication (S207) receives the BOD request from the simple master unit (1) (yes in S208).
s) When the BOD request is received, 3
Switching to 2 kbps data communication, the simple master unit (1)
Then, a 32 kbps data communication is started via the ISDN line (S209).

If there is no call request from a slave unit other than the slave unit (2), the simple master unit (1) sends the slave unit (2) a pseudo 64 kbps high-speed data communication to a 64 kbps high speed. Control to return to data communication. Therefore, the simple master unit (1) notifies the slave unit (2) of a wireless channel 1 reconnection request for requesting reconnection of the wireless channel 1 through the control channel (S111). Thereafter, the simple master unit (1) reconnects the wireless unit 1 with the slave unit (2) (S112), and causes the data frame generation unit (106) to generate pseudo data for two wireless channels. Then, the data communication is switched to the 64 kbps high-speed data communication, and the 64 kbps high-speed data communication is started again via the ISDN line interface (102) (S
113).

On the other hand, a data frame is held and a pseudo 64k
The slave unit (2) realizing bps high-speed data communication (S207) waits for the BOD request and the wireless channel 1 reconnection request from the simplified master unit (1) (S208, S208).
210), upon receiving the wireless channel 1 reconnection request, reconnect the wireless base station with the simple master unit (1) (S211), and execute the data frame generation / decomposition unit (20).
The pseudo management of the data on the wireless channel 1 side in 4) is completed,
The decomposition of the data frame is returned to the data frame management for two wireless channels, and the 64 kbps high-speed data communication is started again (S212).

As described above, the simple master unit (1) and the slave unit (2)
By performing the above-described control at regular intervals, wireless communication can be performed while maintaining 64 kbps high-speed data communication without causing loss of synchronization between the simple master unit (1), the slave unit (2), and the ISDN line. One channel is set as a free channel, and during this time, the simple master unit (1) transmits / receives a call to / from another slave unit by transmitting a control channel using the free channel.

[0036]

As described above, the simple master station of the present invention generates data for two wireless channels in a pseudo manner when disconnecting one wireless channel with a slave unit, and sets up the ISDN line interface unit. By transmitting to the ISDN line via the network, it is possible to maintain a communication state without causing loss of synchronization due to loss of data to be transmitted to the ISDN line due to the disconnection of the one wireless channel.
It is possible to perform control with the slave unit, control of outgoing / incoming calls with another slave unit, and the like using the disconnected wireless one channel.

Further, when a wireless channel is disconnected from the simplified master station, the slave unit of the present invention manages the data of the wireless one channel in a simulated manner and combines the data with the received data of the other wireless channel. By holding the data frame,
Without causing loss of synchronization due to the loss of received data on the wireless one channel, and enabling control with a simple master station using the disconnected wireless one channel,
It is possible to easily return to the communication with the simple master station again using the two wireless channels.

Further, according to the wireless communication system and the wireless communication method comprising the simple master and the slave according to the present invention, the synchronization between the simple master, the slave and the ISDN line does not occur. For example, one wireless channel is used as an idle channel while maintaining 64 kbps high-speed data communication, and the simple master unit transmits a control channel using the empty channel, thereby enabling control with the slave unit and outgoing / incoming control with other slave units. Wireless communication.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a wireless band on demand system of the wireless communication system according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 simple master unit 101 main control unit 102 ISDN line interface unit 103 channel codec unit 104 wireless interface unit 105 invalid data detection unit 106 data frame generation unit 2 slave unit 201 main control unit 202 wireless interface unit 203 channel codec unit 204 data frame generation Decomposition unit 205 Data interface unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI H04Q 7/38

Claims (8)

(57) [Claims] 1. A simple master unit of a wireless communication system connected to an ISDN line and performing data communication of a multi-channel access method using two wireless channels with a plurality of slave units, and exchanging data with the ISDN line. An ISDN line interface unit, a channel codec unit for allocating a communication channel to a time slot in a wireless line, and disassembling and assembling a wireless frame having a control channel and a communication channel, and a wireless interface for transmitting and receiving data via the wireless line Unit, an invalid data detection unit that detects whether the transmission / reception data via the wireless line is valid data or invalid data, and when the transmission / reception data is detected as invalid data by the invalid data detection unit, the slave unit transmitting and receiving data Instruct the user to disconnect one wireless channel,
A data frame generation unit for generating and transmitting a pseudo data frame instead of the data frame decomposed by the channel codec unit to the ISDN line via the ISDN line interface. master station. 2. A slave unit of a wireless communication system for performing data communication of a multi-channel access method using two wireless channels with a simple master unit connected to an ISDN line, wherein the simple master unit is connected via a wireless line. A wireless interface for transmitting and receiving data to and from a channel, a channel codec for allocating a communication channel to a time slot in a wireless line, and disassembling and assembling a wireless frame having a control channel and a communication channel, and an ISDN line via the simple master unit. When generating and disassembling data frames to be transmitted and received and disconnecting one wireless channel in response to the instruction for disconnecting one wireless channel from the simple master station, a pseudo data frame is generated to maintain synchronization. And a data interface for inputting and outputting digital signals. Handset of a wireless communication system according to claim Rukoto. 3. A simple master unit according to claim 1 and a slave unit according to claim 2, wherein the simple master unit and the slave unit perform 64 kbps high-speed data communication by a multi-channel access method on a wireless line. A wireless communication system, characterized by: 4. The wireless communication system according to claim 3, wherein the simple master unit disconnects one wireless channel when the invalid data detection unit detects invalid data, and does not cause loss of synchronization due to lack of transmission / reception data. The data on the wireless channel side disconnected as a data frame is pseudo-managed, and a data frame is generated in a pseudo manner together with the data transmitted / received from the wireless channel side not disconnected.
A wireless communication system for realizing 4 kbps high-speed data communication. 5. The wireless communication system according to claim 4, wherein said simple master unit transmits a control channel using one disconnected wireless channel, thereby providing a current pseudo 64 kbps.
s A wireless communication system capable of controlling outgoing / incoming / outgoing requests to slave units other than the slave unit performing high-speed data communication. 6. The wireless communication system according to claim 5, wherein when there is an outgoing / incoming / outgoing request to a slave other than the slave, data communication with the slave is changed from pseudo 64 kbps high-speed data communication to 32 kbps data communication. Switching, when there is no outgoing / incoming request for a slave unit other than the slave unit, wireless band-on-demand for returning data communication with the slave unit from pseudo 64 kbps high-speed data communication to 64 kbps high-speed data communication is enabled. Wireless communication system. 7. A simple master unit and a plurality of slave units use a wireless channel 2 and a multi-channel access method of 64 kbp.
s In a wireless communication method for performing high-speed data communication, the simple master unit monitors whether data transmitted / received via a wireless line is valid or invalid, and when invalid data is detected for a certain period of time, A request for disconnection of the wireless 1 channel is made by the associated control channel in the communication slot of the wireless 1 channel among the used wireless 2 channels, and when the disconnection permission is received from the slave unit, the wireless 1 channel is disconnected, By generating data for two radio channels in a simulated manner and transmitting the data to the ISDN line, an idle channel is created and a control channel is transmitted to enable control of transmission / reception requests to slave units other than the slave unit. When there is no valid data to be transmitted to the ISDN line via the simple master in response to the wireless one channel disconnection request from the simple master, Notifying the simplified master station of permission of disconnection of one wireless channel using the associated control channel in the communication slot, disconnecting one wireless channel, simulating management of data of one wireless channel, and controlling data of another wireless one channel. A wireless communication method comprising: holding a data frame together with received data. 8. When there is an outgoing / incoming request to a slave other than the slave, data communication with the slave is performed by a pseudo 64k.
bps high-speed data communication is switched to 32 kbps data communication, and if there is no outgoing / incoming / outgoing request to a slave other than the slave, data communication with the slave is simulated at 64 kbp.
The wireless communication method according to claim 7, wherein a wireless band on demand for returning from the s high-speed data communication to the 64 kbps high-speed data communication is enabled.