JP3101475B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel access type radio communication apparatus having a control channel.

[0002]

2. Description of the Related Art Conventionally, in a radio telephone system using a multi-channel access system having a control channel, such as a low power cordless telephone, retransmission processing accompanying a collision of a control signal or the like is performed in order to avoid collision of the retransmission signal. Retransmission was performed based on the expiration of the random timer.

[0003]

However, the above conventional example has the following problems.

When the random timer is realized by software or hardware, conditions such as a shift in the activation timing of the wireless terminal are added, and even if control by the random timer is added,
Often, control signal collisions occur.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a multi-channel access wireless line having a control channel.
In a wireless communication device to which a wireless base station that communicates with the wireless terminal is connected, the wireless base station has means for notifying the wireless terminal of connection position information of the wireless base station, and a retransmission timing of a control signal from the wireless terminal, It is created based on the connection position information. Further, the present invention, in a wireless communication apparatus that connects a wireless terminal via a wireless channel of a multi-channel access scheme having a control channel, the wireless communication apparatus having a means for notifying the wireless terminal of a call code of the wireless terminal ,
The retransmission timing of the control signal from the wireless terminal is created based on the call code.

[0006]

FIG. 1 is a diagram showing a system configuration of a radio telephone system using a low power cordless telephone embodying the present invention, and FIG. 2 is a diagram showing functions of a radio base station and a radio telephone terminal constituting a system embodying the present invention. FIG. 3 is a block diagram, FIG. 3 shows an initialization sequence of the system, FIG. 4 is a flowchart for setting a retransmission timer value at the time of initialization of the wireless telephone terminal, FIG. FIG. 7 shows a sequence chart at the time of a control signal collision according to the embodiment of the present invention.

In FIG. 1, reference numeral 100 denotes a communication control device;
10 to 115 are wireless base stations, 120 to 125 are KT (wireless telephone terminals), 110 and 120, 111 and 1 respectively.
21, ... are paired.

In FIG. 2, reference numerals 201 to 204 denote functional blocks of a radio base station, 205 to 208 denote functional blocks of a radio telephone terminal, 201 denotes a wired line communication interface unit, 202 and 207 denote control units, and 203 and 208.
Is an EEPROM for storing nonvolatile data such as wireless identification information and use control channel information, and 204 and 205 are wireless units.

First, based on the system initialization sequence shown in FIG. 3, a method of notifying the physical information (in this embodiment, the terminal number of the communication control device (100)) to the wireless telephone terminal KT will be described below.

After initialization (start of power supply, etc.), the wireless base station (11x) transmits a reset request message (300) to the communication control device (100) to notify the connection of the terminal.

The communication control device (100) receives the reset request (300) and receives the reset request (300).
Sends a reset message (301) to the terminal to request terminal initialization.

The radio base station (11x) receives the reset message (301), initializes itself, transmits a terminal class notification message (302), and performs communication control to confirm that it is the radio base station. Notify the device (100).

The communication control device (100) receives the terminal class notification message (302), recognizes that the type of the connected terminal is a radio base station, and sends a message to the transmission source radio base station (11x). Physical information notification message (30
3) to notify physical information (in the embodiment, the terminal number of the source wireless base station) related to the connection position of the wireless base station.

The radio base station (11x) receives the physical information notification message (303) and notifies the radio telephone terminal KT of the physical information using a physical information notification signal (304).

The wireless telephone terminal KT (12x) receives the physical information notification signal (304), performs predetermined function processing based on the physical information (in this embodiment, the terminal number of the source wireless base station), and performs retransmission. Calculate the timer value (Fig. 4),
A physical information response signal is returned to the wireless base station (11x).

In 403, EEPR calculated previously is used.
It is determined whether the value matches the value stored in the OM, and if the value matches, the value is not changed.

The radio base station (11x) receives the physical information response signal (305), recognizes that the radio telephone terminal KT has recognized the physical information, and sends a physical information response message () to the communication control device (100). 306).

The communication control unit (100) receives the physical information response message (306), and receives the physical information response message (306).
2x), the wireless base station (11)
For x), an initial data notification message (307) for notifying necessary data at the time of terminal activation is transmitted.

The radio base station (11x) receives the initial data notification message (307), initializes internal rising data, and sends an initial data notification signal (308) to the radio telephone terminal KT (12x). Send.

The radio telephone terminal KT (12x) receives the initial data notification signal (308), performs initial setting of internal data, recognizes a link with the communication control device (100),
Start normal operation.

Next, retransmission processing at the time of a control signal collision from the radio telephone terminal KT will be described below with reference to the sequence chart of FIG.

When a request for transmitting a control signal on a control channel occurs simultaneously to KT1 (wireless telephone terminal 1) and KT2 (wireless telephone terminal 2) (simultaneously on-hook operation, etc.), the control channel busy detection immediately before the start of transmission is performed. Judge that it is empty,
The transmission of the control signals (610, 620) is started (FIG. 5,
501, 502).

The control signals (610, 62) from the two terminals
0) collide in space and the corresponding radio base station (110, 1)
In 11), data cannot be recognized.

Therefore, the radio base station does not return an Ack signal for the control signal.

Since neither KT1 nor KT2 can receive the Ack signal for the transmitted control signal, it recognizes that the transmitted control signal has been lost due to spatial collision, and uses the retransmission timer value calculated from the physical information at the time of terminal initialization. Based on
The control signal is retransmitted (611, 621) (FIG. 5, 50).
3-506).

Since the value of the retransmission timer used here takes a value unique to each wireless telephone terminal connected to the communication system, there is no collision of retransmission control signals on the same system.

The retransmission control signals (611, 611) from the two terminals
621) has been normally received by the radio base station (110, 11).
In 1), an Ack signal (612, 622) is returned, and a control command (613, 623) is transmitted to the communication control device (100).

The radio telephone terminal KT receives the Ack signal (612, 622) from the corresponding radio base station and recognizes that the retransmission control signal has arrived normally (507 to 50 in FIG. 5).
9).

As described above, when the system is initialized,
By setting the control signal retransmission timer value in accordance with the physical information (terminal number) of the connected communication control device, it is possible to reduce the probability of collision of retransmission control signals.

In the above embodiment, an example is described in which a low power analog cordless telephone system is used as a wireless telephone system having a control channel. In addition, a plurality of control channels such as a digital cordless telephone system are used. It can also be used for wireless telephone systems.

Further, instead of the physical information (terminal number), it may be created based on its own calling code.

[0032]

As described above, the communication control device 100 notifies the radio telephone terminal PKT of the terminal number of the radio base station FBS or the calling number of the radio telephone terminal. By re-transmitting the control signal after the elapse of the time corresponding to the calling number, it is possible to prevent re-collision when the control signal collides.

[0034]

As described above, according to the present invention,
In a wireless communication apparatus to which a wireless base station that communicates with a wireless terminal via a wireless channel of a multi-channel access scheme having a control channel is connected, the wireless communication apparatus includes means for notifying the wireless terminal of connection position information of the wireless base station. By creating a retransmission timing of a control signal from the wireless terminal based on the connection position information, it is also possible to provide a wireless terminal via a multi-channel access wireless line having a control channel.
In the wireless communication device to connect the terminal, has a means to notify the wireless terminal of the call code of the wireless terminal, by creating a retransmission timing of a control signal from the wireless terminal based on the call code, There is an excellent effect that the collision of the control signals can be reliably reduced without complicated setting operations.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is a functional block diagram according to the embodiment of the present invention.

FIG. 3 is a sequence diagram illustrating an embodiment of the present invention.

FIG. 4 is a flowchart for setting a timer of the wireless telephone terminal according to the embodiment of the present invention.

FIG. 5 is a control signal transmission control flowchart of the wireless telephone terminal according to the embodiment of the present invention.

FIG. 6 is a sequence chart at the time of a control signal collision according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 100 communication control device 110 to 115 wireless base station 120 to 125 wireless telephone terminal (KT)

Claims (2)

(57) [Claims] 1. A wireless communication apparatus to which a wireless base station that communicates with a wireless terminal via a wireless channel of a multi-channel access method having a control channel is connected, wherein connection position information of the wireless base station is notified to the wireless terminal. A wireless communication device for generating a retransmission timing of a control signal from the wireless terminal based on the connection position information. 2. A wireless communication apparatus for connecting a wireless terminal via a wireless channel of a multi-channel access system having a control channel, wherein a means for notifying the wireless terminal of a call code of the wireless terminal.
And a retransmission timing of a control signal from the wireless terminal is created based on the call code.