JPS58184838A - Radio telephone system - Google Patents

Abstract

PURPOSE:To decrease the connection time and to use a communication channel effectively, by receiving and transmitting information with a control signal including a subscriber discriminating signal of an abbreviated number for the second and succeeding control in a connection sequence between a radio device of a master station and a radio telephone set. CONSTITUTION:A control signal from a remote station is demodulated at a demodulation section 22 and applied to a control section 23. When a demodulation signal is inputted to the section 23, the signal is detected at a preamble detecting circuit 26, a frame synchronism detecting circuit 27 and a detecting circuit 28 of controlling and discriminating signals, the subscriber discriminating signal is detected by using both the 1st and the 2nd abbreviated subscriber discriminating circuits 24, 25, for the first stage only, and the subscriber discriminating signal is detected at the circuit 24 at the 2nd and succeeding detections. In transmitting a response signal, each signal is generated at a preamble signal generator 29, a frame synchronizing signal generator 30 and a control signal type signal generator 31 through the instruction of the control section 23, each signal is transmitted to a remote station from a transmission section 33, the decrease in the connecting time is attained and the communication channel is used effectively.

Description

[Detailed Description of the Invention] Object of the Invention The present invention aims to shorten the connection time and increase the connection rate by combating the wireless telephone system and using a shortened subscriber identification signal especially after 2fg1. This is related to the wireless telephone system that can be used.

BACKGROUND ART Radiotelephone systems that have been in practical use include, for example, radiotelephone communication between a base station and a mobile pigeon. Wireless telephone system, ship uncondensed electric hook system or train no 41i
There are two types of mobile radio telephone systems: a 11 & connection system and a mobile radio telephone system in which radio telephone communication is performed between a master station radio device and a radio telephone. The former performs 1m communication between stations over a fairly wide range, whereas the latter performs short-range communication between wireless devices within a very limited range of homes, offices, or a certain area. Both are members.

In these wireless telephone systems, as shown in FIG. No sharing, Im! Conduct telephone communications. In Figure 1,
Three stations among ends w112 to 1n are channels OH1 to OH3.
While communicating with base station 1 using the wireless radio II+!, other terminal stations must wait until one of them becomes free even if there is a call request. 5 devices, it is necessary to make calls with multiple terminal stations at will (and calls must be made on multiple channels at the same time).In order to prevent i!! connections due to interference, each time a control signal is exchanged, They are assigned an identification number and perform ejection and connection operations.However, in recent high-capacity mobile communication systems, the number of subscriber mobile terminal stations becomes a watchdog, and these Subscriber l to distinguish
It is also necessary to consider the condition of each number considerably. This also reduces the length of the subscriber identification signal, resulting in longer connection times. In order to shorten the waiting time and effectively use the limited channels, it is desirable to make the signal length as short as possible, such as 11JIiI. In addition, if the length of the subscriber identification signal is increased, the attrition rate increases, and the connection
There are also flaws in the peak that lead to a decline in quality.

・１：・　、、。

Conventionally, in large-capacity mobile communication systems, as shown in FIG.
It consists of digits, and when it comes to sending and receiving, it is transmitted using two bits, ゛1'' and ``0''. To send the number, a signal with a length of 20 bits (-2") is required.

Actually, there is a check mark after the identification number) (OHK
) is added and transmitted, and the receiving side checks this to detect and correct the kneading. Normally, the probability of incorrect focus in a wireless telephone is 1o-3, and the longer the control number, the higher the number! If the length is 1, there will be more mistakes.

FIG. 3 is a format diagram of a conventional control signal, and the fourth [iM is a transmission sequence chart with a conventional subscriber identification signal added.

As shown in FIG. 3, the control signal is composed of a preamble signal 1, a frame synchronization signal 2, a control signal type IS number 3, a subscriber-specific signal 5, and the like. Here, the subscriber identification signal 5 is a double code □ including all numbers (20 bits or more) as shown in FIG. 2, and the control signal type signal 3 is a call, response, channel switching light r, This is a code indicating the type of each signal, such as audio circuit on, call end, etc. Radio i! from the base station wireless device 16! 1 aircraft 16
There are cases where a call is made from the wireless telephone 16 to the device 15 without a base station, but both are different in direction and have the same signal format, so in the first diagram, Only the latter case is shown. Next, a calling signal is sent out, which includes only the preamble 11 frame synchronization signal 2, υ; is also removed because there is no need to worry about the first line being tied.Next, response signal B is sent back, which includes the following:
Specified number of channel that is currently empty @4
The control signal type signal 3 is also omitted here. Next, a channel switching completion signal SC is sent out, which includes a preamble signal 1, a frame synchronization signal 2, a control signal type signal 3, and a subscriber identification signal δ. Next, a voice line on signal is sent back and preparations for a call are completed. This signal VD contains exactly the same signal 1°2.3 as the previous channel switching completion signal C.
．． 5 is included, so the W) that differentiates these must be controlled by 0! Number type signal 3 is required. During this process, a communication signal from the other party is sent and received, and finally a termination signal F is sent out from the packing machine 16 via radio. This signal F also corresponds to the previous two control signals 0. Since it is the same 7-ohm as D, type signal 3
is necessary.

Thus, as the outgoing sequence for the connection, Pl
There are many interference signals, especially the subscriber identification signal (5)
P (more than 20 bits F + check bit) is long &'
), it takes a long time to generate fbanoke/s), channel σ)
Although it is not used effectively, the error rate is high and the connection rate is low.

Purpose of the Invention The purpose of the present invention is to shorten the connection time, effectively utilize the communication channel, and improve the connection rate by reducing the number of incorrect focus points, in order to eliminate such conventional drawbacks. The object of the present invention is to provide a wireless telephone system that can achieve the following goals.

In order to achieve the F1 objective, the wireless telephone system of the present invention shares a plurality of radio channels between a master station [3 device and a plurality of wireless telephones to which different subscriber numbers are assigned. , In the radio "I [&! In the first stage of the connection sequence between the 14M radio equipment and the wireless port engine, the control signal including the subscriber identification signal in all numbers is sent and received. After the next Rw/, information is exchanged using a control signal including a subscriber-specific signal with a shortened number.

Embodiment of the Invention FIG. 5 is a diagram showing a shortened subscription SII number according to the invention, FIG. 6 is a format diagram of a control signal showing an embodiment of the invention, and FIG. 3 is a transmission sequence chart showing an embodiment of the invention.

In the present invention, in order to shorten the subscriber identification signal,
All *p and 1 of the subscriber #IA specific number are not used, and a shortened number is used instead. In this case, in order to avoid confusion with other subscribers as much as possible, avoid using shared numbers.

For example, the fifth [i! ! The lower three digits of the ten consecutive digits are used to create an abbreviated subscriber identification number, as shown in It. Of course, the top numbers, the middle five numbers,
Alternatively, you can choose every other three numbers.

If the subscriber identification number is shortened to 2 in this way, it will naturally become 2.
Since the number of bits of the signal for each subscriber St expressed by the concatenated code is also shortened, the check bit 0 is also shortened. In the present invention, the signal portion encoded by 24 of the shortened subscriber identification number among all the subscriber identification numbers is called the first shortened subscriber IM specific signal 6, and the remaining 24 digits of the subscriber identification number The concatenated signal portion is called a j12 abbreviated subscriber identification signal 7. Then, the first shortened subscriber identification code 6 and #! It is necessary that the signal obtained by combining the two amplified subscriber identification signals 7 becomes a full-fledged subscriber identification signal including all numbers.

The control signals of the present invention are as follows: 1, as shown in FIG. I-condensed subscriber identification signal 6 and #1
2 Composed of 7 signal groups for shortened subscribers 1Ill In addition, in the embodiment, the conventional subscriber identification signal is divided into two groups of reduced subscriber identification signals, but it is only shortened. in,
In the present invention, when transmitting a calling sequence, etc., only in the first stage (calling signal A in the calling sequence), the processing is performed without dividing into two parts. 11 shortened subscriber identification signal 6 and the second
tilJ 111+ with shortened subscriber identification signal 7 added
From the next time onwards, as shown in FIG. 0(b), control f1 to which only the first shortened subscription SII specific signal 6 is added is transmitted.

Figure 7 explains the transmission sequence.As is clear from a comparison between Figure 7 and Figure #4, the present invention does not replace the conventional sequence order, but the control signal is shortened. In particular, there is a shortened flu human expert identification signal 6 after 2 [g1]. First, the calling signal person sends a preamble signal 1.7 time synchronization F5 No. 2, a caller's call signal V6, and an absolutely 2-way smart subscriber identification signal in the same format as before. Send 7. The next response signal B (4, after the preamble signal 1, frame synchronization signal 2, and channel designation number signal 4, only the first invocation message 4!j6 is returned. Next channel switching complete %a sends out only the shortened subscriber identification signal 6 after each signal 1, 2.3.

In the next acoustic-path-on signal, after each signal in 1.2.3, the signal length is shortened by returning only the reduced subscriber identification signal 6, but the solid line in As shown, even if subscriber identification signal 0 is omitted, there is no need to worry about #4 connection at this stage, so efforts are made to further shorten the signal.

Call flJ! After sending and receiving an I insult, a first abbreviated subscriber farewell signal 6 is sent to each signal of 1°2.3 as a call termination signal 1.

In this way, since the shortened subscriber identification signal is used from 2I & 11th onward, the control signal is shortened and wit
The Japanese patent application period will also be shortened.

FIG. 8 is a block diagram of a wireless device showing an embodiment of the present invention.

When a control signal is sent from the partner station, the receiver 21 receives it, the receiver 111!22 demodulates it, and sends it to the controller 23. The control unit 23 includes a first shortened subscriber-separate circuit 24.
, second shortened subscriber identification circuit 2, preamble detection circuit 26, frame synchronization detection circuit 27.1III
Separate signal detection circuit 28, preamble signal generation! a29,
Frame synchronization signal generation -30 and control signal type signal generation W31 are added. When the control f1 is input to the control unit 23, the preamble detection circuit 26 and the frame
Testffl M 27th, i! After each signal is detected by the 4J signal detection circuit 28, etc., the first step is to connect ill and shortened subscriber identification circuit 24.25.
The subscriber-specific signal is detected using both of the sub-subscriber identification signals, but from then on, only the first shortened subscriber Il-specific jump path 24 is used to detect the subscriber identification signal.

On the other hand, in order to send a response signal etc. to the received control signal, the control section 2. According to the instructions of the B members, each signal is generated by the preamble signal generator 29, the frame synchronization signal generator 30, the control i1 telegraph type signal generator 31, etc.
The control section 23 generates a subscriber-specific signal for reducing the number of subscribers and sequentially sends it to the modulation section 32, and the transmission section 33 transmits a control signal to the partner station.

Effects of the Invention As explained above, according to the present invention, subscriber lll1
Since the shoulder signal is shortened, the signal length of the control signal is shortened and connection time can be shortened. Also, by shortening the signal length, error pits can be reduced and the connection rate can be improved. I can do it.

[Brief explanation of the drawing]

Structure Figure 1 is an explanatory diagram of the wireless telephone system, j12WJ is an explanatory diagram of a conventional subscriber number, diagram l113 is a format diagram of a conventional control signal, diagram jI4 is a conventional outgoing sequence chart, and diagram #I5. FIG. 6 is a format diagram of a control signal showing an embodiment of the present invention, #! Fig. 7 is a transmission sequence chart showing an embodiment of the present invention, and Fig. 4 is a block diagram of a Sless caster showing an embodiment of the present invention. l: preamble signal, 2: frame synchronization signal, 3: control signal type signal, 4: channel designation number signal, 5: conventional subscriber separation signal, 6: first shortened subscriber lit specific signal, 7: th 2 abbreviated subscriber identification signal, 11:jIls ground station plain bag radio equipment to 1n: end station radio equipment. Patent applicant Nippon Telegraph and Telephone Public Corporation agent Patent attorney M.
, *Figure 1 Figure 3)ゝ 414 5-: , :, , :: Figure 6 Figure 7

Claims (1)

[Claims] A master station unit and a plurality of wireless telephones, each assigned a different subscriber number, share llll wireless channels and send and receive control signals. The device has means for detecting various ili control signals, means for detecting a subscriber identification signal of full numbers, and means for detecting a subscriber identification signal of abbreviated numbers, and has a means for detecting various kinds of ili control signals, a means for detecting a subscriber identification signal of shortened numbers, and a base station radio device and a radio telephone. In the first stage of the connection sequence between the two, control signals including full-numeric subscriber identification signals are exchanged, and from the next stage onwards, information is exchanged using a control signal ship containing shortened numerical subscriber identification signals. A wireless telephone system characterized by: