JPH0831925B2 - Charge signal transmission method in time division multiplex wireless communication system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging signal transmission system in a time division multiplex wireless communication system, and in particular to a master station connected via time division multiplex wireless lines for uplink and downlink. And a subscriber line multiplex transmission system in which a plurality of slave stations connecting a plurality of subscriber terminals are used for communication, and a charging signal including a call charge and a call time during a call between subscriber terminals belonging to the same slave station The present invention relates to a charging signal transmission method in a time division multiplex wireless communication system in which a parent station notifies a subscriber via a slave station.

(Prior Art) A time division multiplex wireless communication system targeted by the present invention is
As shown in FIG. 4, a master station 401 connected to a switching line (not shown), and a plurality of master stations 401 connected to the master station 401 via a pair of time-division multiplex wireless lines of uplink and downlink. Child station (40
2,402, ...) and each slave station 402 has a plurality of subscriber lines (40) to which terminals (telephones, facsimiles, etc.) 403 are connected.
It houses 4,404, ...). The terminal 403 is connected to the slave stations (402, 402, ...) Via a wired line, and further connected to the master station 401 via a wireless uplink line, and secures communication with a desired partner terminal via an exchange line (not shown). Communication between subscriber terminals of the same slave station is performed via the slave station, the master station, and the slave station.

The charging process for the communication at this time is normally entirely processed by the master station, and the charging signal is transmitted from the master station 401 to the slave station (4
02,402, ……) will be notified.

Further, as shown in FIG. 5, the transmission frame of the time division multiplexing wireless line has almost the same frame structure in both the uplink and the downlink, and one frame has one control channel (CH ₀ ) and a plurality of calls. Channel (CH _{1 to} CH _n )
Composed of and.

The control channel consists of a preamble area 501, a synchronization area 502, a control area 503, etc.
3 is used for line control such as call control and call control.

The call channel includes a preamble area 504, a simultaneous area 505, a communication data area 506, and a service area 507. The service area 507 is used for transmission of a charging signal from the master station to the slave station and a specific service signal from the slave station to the master station. To be done.

(Problems to be Solved by the Invention) By the way, a call between subscriber terminals belonging to the same slave station can be processed by providing an exchange function in the slave station. If it is processed by intra-slave station exchange and the call channel of the time division multiplex wireless line between the master station and the slave station is not used, that much call channel can be assigned to other call waiting subscriber terminals. Effective use of channels can be achieved. Further, since the transmission of the communication channel to the master station is stopped at the slave station which is performing the intra-slave station exchange, it is not necessary to waste power consumption, which is very convenient. However, in the conventional time division multiplex wireless communication system, since the transmission of the charging signal is performed by using the service area 507 of the call channel, when the intra-slave station exchange method is allowed. However, there is a problem in that a charging signal cannot be transmitted and a proper charging process for a call cannot be performed.

The present invention has been made in view of such a conventional problem, and an object thereof is that subscriber terminals belonging to the same slave station perform intra-station switching without using a time division multiplex wireless line between the master station and the slave station. An object of the present invention is to provide a billing signal transmission system in a time division multiplex wireless communication system capable of transmitting a billing signal from a master station to a slave station even when a telephone call is made.

(Means for Solving the Problems) The charging signal transmission system in the time division multiplex wireless communication system of the present invention has the following configuration in order to achieve the above object.

That is, in the charging signal transmission system in the time division multiplex wireless communication system of the present invention, one transmission frame of the time division multiplex wireless line is composed of one control channel for line control and a plurality of communication channels, A plurality of slave stations accommodating a plurality of subscriber lines are connected to each other via a pair of the time division multiplex wireless lines of an uplink from the slave station to the master station and a downlink from the master station to the slave station. A charging signal transmission system in a time division multiplex wireless communication system, in which a master station transmits a charging signal including a call charge and a call time to a slave station for a call between subscribers of a slave station in the time division multiplex wireless communication system. The local station call detecting means for detecting that the calling subscriber and the callee are both subscriber terminals belonging to the local station; and the subscription detected by the local station call detecting means. Inside the terminal A subscriber number inserting means for inserting the subscriber number of the calling subscriber terminal into the subscriber number area provided in the control channel of the transmission frame of the uplink and inserting the subscriber number also at the end of the call in the local station; Switching means for performing a call between subscribers belonging to the own station by switching within the own station and disconnecting the operation of the call channel; a subscriber number area and a billing signal provided in the control channel of the downlink transmission frame Control channel data detecting means for detecting control channel data including a subscriber number and a billing signal inserted in the area by the master station; and whether or not the detected subscriber number and the calling subscriber number match. Comparing means for comparing; based on the detected charging signal when both subscriber numbers match as a result of comparison by the comparing means, Billing information transmitting means for transmitting the billing signal to the calling subscriber terminal, and the master station inserts the billing information into the subscriber number area of the control channel of the uplink transmission frame and terminates the call within the own station Subscriber number detecting means for detecting the calling subscriber number at the time of calling; storage means for storing the detected calling subscriber number; A subscriber number area provided in the control channel of the downlink transmission frame when a billing signal including at least a call time and a call charge is generated based on the subscriber number and the control channel of the downlink transmission frame is transmitted. And control channel data insertion for inserting the calling subscriber number and the charging signal for the calling subscriber terminal into the charging signal area, respectively. Means for ensuring the transmission of the billing signal even for a call between subscribers of the slave station.

(Operation) Next, the operation of the charging signal transmission system in the time division multiplex wireless communication system of the present invention configured as described above will be described by taking communication between subscriber terminals of a slave station as an example.

In the slave station, when the local station call detection means detects that the communication is between the subscriber terminals belonging to the local station, the subscriber number insertion means selects the subscriber terminal among the subscriber terminals detected by the local station call detection means. The subscriber number of the calling subscriber terminal is inserted into the subscriber number area provided in the control channel (hereinafter referred to simply as the uplink control channel) of the transmission frame of the uplink.

On the other hand, the exchanging means exchanges the calls between the subscribers belonging to the own station within the own station and suspends the use of the call channel of the wireless line.

Next, in the master station, the subscriber number detecting means detects the calling subscriber number from the subscriber number area of the uplink control channel at the time of calling and at the end of the call, and the storing means detects the calling subscriber number detected. Remember. Then, when the control channel of the downlink transmission frame (hereinafter, simply referred to as the downlink control channel) is transmitted, the control channel data inserting means generates a charging signal including at least the call time and the call charge, and the downlink control is performed. The calling subscriber number and the billing signal for the calling subscriber terminal are respectively inserted into the subscriber number area and the billing signal area provided in the channel.

As a result, in the slave station, the control channel data detecting means detects the subscriber number and the charging signal from the subscriber number area and the charging signal area of the downlink control channel, and the comparing means detects the detected subscriber number and the calling subscription. The billing information forming means compares the subscriber numbers with each other, and the billing information forming means determines a predetermined result for the calling subscriber terminal based on the billing signal detected when the two subscriber numbers match as a result of the comparison by the comparing means. The billing information will be sent.

As described above, according to the billing signal transmission system of the present invention, the billing signal can be transmitted also through the control channel, so that the telephone call between the subscribers in the local station can be made by using the radio channel of the call channel. Instead, it can be done by switching within the local station, the wireless channel of the call channel can be effectively used, and unnecessary power consumption can be prevented.

(Example) Hereinafter, the Example of this invention is described with reference to drawings. 1 and 2 show respective configurations of a slave station and a master station that implement the charging signal transmission system of the present invention.

A slave station according to an embodiment of the present invention is as shown in FIG.
Antenna duplexer 1, receiver 2, decoder 3, local station call detection circuit 41 as local station call detection means, subscriber number insertion circuit 42 as subscriber number insertion means, and exchange circuit as exchange means. A logic circuit 4 having 43, a subscriber number detecting circuit 5 and a billing signal detecting circuit 6 as control channel data detecting means, a subscriber number comparing circuit 7 as comparing means, and an AND circuit as billing information forming means. 8, timing generation circuit 9 and billing signal control circuit 10
Basically, an encoder 11 and a transmitter 12 are provided.

In addition, as shown in FIG. 2, the master station according to the embodiment of the present invention includes an antenna duplexer 21, a receiver 22, a decoder 23, and
Calling subscriber number detection circuit 24 which is subscriber number detection means
A subscriber number storage circuit 25 as a storage means and a control circuit 26 having a function of a control channel data insertion means.
The charging signal transmitting circuit 27, the encoder 28, and the transmitter 29 are basically provided.

Further, the control channel according to the present invention is constructed as shown in FIG. That is, FIG. 3 (A) shows an upstream control channel transmitted from the child station to the parent station. This upstream control channel is the preamble area 501,
A subscriber number area 31 is provided in addition to the synchronization area 502 and the control area 503. Further, FIG. 3 (B) shows a downlink control channel transmitted from the master station to the slave station, and this downlink control channel includes a preamble area 501, a synchronization area 502, a control area 503, and a subscriber number area 32 and charging. And a signal area 33.

As is well known, in this type of time division multiplexed radio communication system, the control channel is used to control the radio channel and is constantly transmitted and received between the master station and the slave station regardless of whether the communication channel is used or not. is there. The billing signal transmission system according to the present invention focuses on this point.

Next, the operation of the charging signal transmission system of this embodiment will be described.

First, in the local station, in the local station call detection circuit 41 including the logic circuit 4 whose processing base is logical operation through the antenna duplexer 1, the receiver 2 and the decoder 3, the caller and the callee are called. Detecting that both are subscriber terminals belonging to their own station, the subscriber number of the calling subscriber terminal among the subscriber terminals thus detected is provided in the uplink control channel by the subscriber number insertion circuit 42. While inserting into the subscriber number area 31, the detected call between the subscriber terminals is performed by the exchange circuit 43 by the in-house exchange without using the wireless line. Also, the subscriber number is inserted into the subscriber number area in the same manner when the call within the local station ends.

Then, in the master station that has received such an uplink control channel, the calling subscriber number detection circuit 24 via the antenna duplexer 21, the receiver 22 and the decoder 23, the subscriber number area 31 of the uplink control channel. Since the calling subscriber number is detected from the subscriber and the subscriber number is sent to the subscriber number storage circuit 25, the subscriber number storage circuit 25 stores the subscriber number together with the time information at the time of calling and at the end of the call. At the same time, the control circuit 26 is notified of that fact. In response to this notification, the control circuit 26 generates a billing signal including at least the call duration and the call charge based on the time information at the time of calling and at the end of the call stored in the subscriber number storage circuit 25, and the charge signal is kept constant. The charging signal transmission control circuit 27 is activated in a cycle. Then, the billing signal transmission control circuit 27 takes in the billing signal from the control circuit 26, reads out the calling subscriber number from the subscriber number storage circuit 25, and sets it in the downlink control channel when transmitting the downlink control channel. The calling subscriber number and the billing signal are inserted into the subscriber number area 32 and the billing signal area 33, respectively.

Such a downlink control channel is transmitted to the slave station via the encoder 28, the transmitter 29, and the antenna duplexer 21.

As a result, in the slave station, the subscriber number detection circuit 5 and the billing signal detection circuit 6 detect the subscriber number and the billing signal from the subscriber number area 32 and the billing signal area 33 of the downlink control channel. The generated subscriber number is sent to the subscriber number comparison circuit 7, and the detected billing signal is sent to one input of the AND circuit 8.

The subscriber number comparison circuit 7 confirms that the detected subscriber number and the subscriber number of the calling subscriber terminal to which the switching circuit 43 of the logic circuit 4 is switching-connected are matched.

This matching confirmation operation is a selection operation for the case where there are a plurality of subscriber terminal groups for in-house communication.

When a match is confirmed, a match signal is sent to the other input of the AND circuit 8, and the AND circuit 8 sends a billing signal to the timing generation circuit 9. The timing generation circuit 9 converts this billing signal into billing data having a prescribed pulse width and sends it to the billing signal control circuit 10. The charging signal control circuit 10 sends predetermined charging data to the corresponding subscriber line 404.

(Effects of the Invention) As described in detail above, according to the charging signal transmission system in the time division multiplex wireless communication system of the present invention, the charging signal can be transmitted also through the control channel. Calls between subscribers can be exchanged in-house without using the wireless line to effectively use the wireless line, and the transmission of the billing signal can be secured even when preventing unnecessary power consumption. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a slave station according to an embodiment of the present invention, FIG. 2 is a block diagram of a master station according to an embodiment of the present invention, and FIG. 3 is a configuration of a control channel according to the present invention. FIG. 4 is a block diagram showing the structure of a time division multiplex wireless communication system targeted by the present invention, and FIG. 5 is a view showing the structure of a conventional transmission frame. 1,21 …… Antenna duplexer, 2,22 …… Receiver, 3,23 …… Decoder, 4 …… Logic circuit, 5 …… Subscriber number detection circuit, 6
... Billing signal detection circuit, 8 ... AND circuit, 9 ... Timing generation circuit, 10 ... Billing signal control circuit, 11,28
Encoder, 12, 29 ... Transmitter, 24 ... Calling subscriber number detection circuit, 25 ... Subscriber number storage circuit, 26 ... Control circuit, 27
...... Billing signal transmission circuit, 31,32 …… Subscriber number area, 3
3 …… Billing signal area, 401 …… Parent station, 402 …… Slave station, 403
…… Subscriber terminal, 404 …… Subscriber line.

Claims (1)

[Claims] 1. A plurality of slave stations, each of which comprises a master station and a plurality of subscriber lines, wherein one transmission frame of a time division multiplex wireless circuit comprises one control channel for circuit control and a plurality of communication channels. Between the subscribers of the slave station in the time division multiplex wireless communication system in which is connected via a pair of the time division multiplex wireless line of the uplink from the slave station to the master station and the downlink from the master station to the slave station. Billing signal transmission system in a time division multiplex wireless communication system in which a parent station transmits a billing signal including a call charge and a call time to a slave station for a call of a mobile telephone; the slave station is a calling subscriber and its calling. A local call detecting means for detecting that the destinations are subscriber terminals belonging to the local station; and a subscriber of the calling subscriber terminal among the subscriber terminals detected by the local station call detecting means Number of the uplink transmission frame A subscriber number inserting means for inserting the subscriber number into the subscriber number area provided in the control channel and for inserting the subscriber number even when the call within the own station ends; A switching means for disconnecting the operation of the call channel; a control including a subscriber number and a billing signal inserted by the master station in a subscriber number area and a billing signal area provided in a control channel of a transmission frame of the downlink Control channel data detecting means for detecting channel data; comparing means for comparing whether or not the detected subscriber number and the calling subscriber number match; a comparison result of the comparing means, both subscriber numbers And a billing information transmitting means for transmitting the billing signal to the calling subscriber terminal based on the detected billing signal. And a subscriber number detecting means for detecting a calling subscriber number inserted at the subscriber number area of the control channel of the uplink transmission frame at the time of calling and at the end of the call in the local station; Storage means for storing the detected calling subscriber number; and a billing signal including at least a call time and a call charge based on the calling subscriber number stored at the storage means at the time of calling and at the end of the call within the local station. When generating and transmitting the control channel of the downlink transmission frame, the calling subscriber number and the calling subscriber are provided to the subscriber number area and charging signal area provided in the control channel of the downlink transmission frame. Control channel data inserting means for inserting the billing signals to the terminals, respectively, and the billing signal is also provided for a call between subscribers of the slave station. A method of transmitting a charging signal in a time division multiplex wireless communication system, which secures the transmission of a signal.