JP2540769B2 - Wireless calling method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio calling system for calling a plurality of mobile stations at the same time, and more particularly to a radio calling system for calling a plurality of mobile stations efficiently.

[0002]

2. Description of the Related Art Regarding the radio calling method, a group of mobile station numbers arriving at a base station is divided into a plurality of groups according to the result of performing an operation on the numbers, each group is accumulated for a certain time, and then each number is stored. The method of transmitting all the digits of the above as they are on the radio is "STANDARD DCDES AND F
ORMATS FOR INTERNATIONALAL
ADIOPAGING ", CCIR Rec. 584-
1 (1982-1986) (Reference 1).

Further, the accumulation time for each group in Document 1 is
There is a method in which the base station notifies the mobile station belonging to each group in advance of the transmission timing of each group by changing it according to the incoming call amount for each group, and each mobile station performs intermittent reception ( Japanese Patent Publication No. 274026) (Reference 2). Also in the car telephone system, the method of dividing the mobile station number arriving at the base station into a plurality of groups and transmitting all digits as they are to the general calling channel without compressing the mobile station number itself is a "digital car telephone". System standard ", RCR STD-27B (1992) (reference 3)
It is described in.

[0004]

In the prior arts disclosed in Documents 1 and 3, the mobile station number is sent as it is without being compressed, so that the number of mobile stations that can be called per unit time is fixed. However, no countermeasures have been taken against the increase in the call loss rate when incoming calls are congested.
Further, in the conventional technique shown in Document 2, measures are taken against incoming congestion, but since the mobile station number itself is not compressed but is transmitted as it is, a measure for improving the utilization efficiency of wireless channels is taken. Didn't.

[0005]

According to the radio paging system of the present invention, a unit for counting a predetermined fixed time, a unit for accumulating a mobile station call request signal group arriving within the fixed time, and a mobile unit Means for adding an identifier to a common element of the station call request signal group, and editing the common element and respective number elements excluding the common element from individual mobile station call request signals into a series of data strings; A radio base station having means for transmitting a sequence on the radio by one transmission command, means for decoding the own station number from the identifier and the number element, and at least a part of the station while the own station is not called. And a means for turning off the power supply.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a base station in the radio calling system of the present invention.

In the base station 10 shown in FIG. 1, the counter 12 has a function of measuring a fixed time predetermined by the system, and is connected to the data storage device 11. The data storage device 11 stores the arriving mobile station number data group, and determines the determination device 13 and the data compression device 14.
With the function to send to. The determination device 13 has a function of rearranging the mobile station number data group transmitted from the data storage device 11 according to a certain rule and determining whether or not data compression is possible according to an algorithm predetermined by the system. The data compression device 14 rearranges the mobile station number data group transmitted from the data storage device 11 according to the same rule as the determination device 13,
Compress the mobile station number data based on the judgment result from
It has a function of adding an identifier indicating compression information, editing it into a series of data strings, and sending it to the transmitter 15. The transmitter 15 has a function of wirelessly transmitting the data string from the data compression device 14 by one transmission command.

FIG. 2 is a block diagram showing an embodiment of a mobile station in the radio calling system of the present invention.

In FIG. 2, the mobile station 20 includes a receiver 21,
The external notification device 22 and the antenna 23 are provided. The receiver 21 has a function of receiving a data string on the radio and determining whether or not the own station is called from the data string.
Further, the external notification device 22 has a function of notifying the outside to the outside when the receiver 21 determines that its own station is called.

Next, the operation of this embodiment will be described.
When the mobile station calling signal a arrives at the base station 10 shown in FIG. 1, the data storage device 11 stores the arrival mobile station number group and receives the transmission permission signal e from the data compression device 14 or the counter 12 When the timer signal f to be transmitted is received after a lapse of a certain time, the mobile station number group b having a certain amount of data determined by the determination device 13 and the data compression device 14 is transmitted. Here, the fixed time is the delay time when the mobile station is called by the system, and the predetermined fixed data amount is the number of mobile station numbers that can be compressed at one time by the data compression device 14. . The determination device 13 sorts the sent mobile station number group b according to a certain rule. For example, when an 8-digit decimal number mobile station number group as shown in FIG. 4 is sent, if these mobile station numbers are set as 8-digit integers and rearranged in ascending order of numbers, as shown in FIG. become. At this time, if a data compression algorithm in which the upper three digits of the mobile station number are common elements is given to the determination device 3, there are three sets of mobile station numbers having the same upper three digits, and therefore the determination device Thirteen
Determines that the data can be compressed, adds the data compression algorithm to the data compressibility notification signal c, and sends it to the data compression device 14. The data compressing device 14 rearranges the mobile station number group b sent from the data accumulating device 11 in the same manner as in FIG. 5, and from the data compressible notification signal c received from the judging device 13 is shown in FIG. As described above, an identifier # indicating a common element and the number of mobile station numbers having the common element are added to the upper three digits of the common element, and the common element from the individual mobile station numbers is added after that. The five-digit number elements except for are arranged, and an identifier * indicating the end of the transmission data regarding the common element is added. This operation is also performed on a set of other mobile station numbers that have the same upper three digits, and finally, an 8-digit mobile station number that has no common elements with other mobile station numbers is added to form a series of data strings. It is edited and sent to the transmitter 15 as a transmission call signal d. After sending, the data compression device 14 sends the transmission permission signal e to the data storage device 11. The transmitter 15 sends out the entire data string from the data compressing device 14 on the wireless channel by a single sending command.

In the mobile station 20 shown in FIG. 2, the data string transmitted from the base station 10 is received by the receiver 21 as a reception call signal g, and the common element identifier # contained in the received data string is detected. The common element of the preceding 3 digits is compared with the upper 3 digits of the mobile station number of the own station, and if they match, the possibility that the own station is called is recognized, and the mobile station having the common element Whether or not the own station is called is determined based on the number of numbers and the 5-digit number elements obtained by removing the common elements from the individual mobile station numbers. If the 3-digit common element and the upper 3 digits of the mobile station number of the own station do not match, at least part of the power is turned off until the common element identifier is detected again. When it is determined that the own station is called, the call notification signal h is sent to the external notification device 22, and the external notification device 22 notifies the outside to that effect.

Next, an embodiment of a method of changing the data compression algorithm in the radio calling method of the present invention will be described.

In the base station 30 shown in FIG. 3, each of the decision devices 32a to 32c has its own data compression algorithm, and the result of performing data compression on the mobile station number group from the data storage device 31 by each algorithm. The octet number and the octet number before compression are reported to the control device 33. The control device 33 has a function of comparing the report results from the determination devices 32a to 32c and notifying the data compression device 35 of the algorithm having the highest compression efficiency.

Next, the operation of the embodiment shown in FIG. 3 will be described. The base station 30 shown in FIG.
If the data storage device 31 stores the mobile station number and receives the transmission permission signal e from the data compression device 35 or the counter 34 receives the timer signal f transmitted after a predetermined time elapses, the determination device 32a to 32c
And the mobile station number group b having a fixed data amount determined by the data compression device 35 is transmitted. Judgment devices 32a to 32c
Rearranges the transmitted mobile station number group b according to a certain rule. Now, it is assumed that this rearrangement rule is common to the determination devices 32a to 32c. The arrival mobile station number group is the same as in FIG. 4 and the result of rearrangement is the same as in FIG. Further, the data compression algorithm of each judging device is that the judging device 32a detects the commonality of the upper two digits of the mobile station number, the judging device 32b detects the commonality of the upper three digits, and the judging device 32c detects the commonality of the upper four digits. And In this case, the determination results by the determination devices 32a to 32c are shown in FIG.
It will be as 9 The determination devices 32a to 32c send the number of octets of the determination result and the number of octets before the determination to the control device 33 as the determination result notification signals k1 to k3, respectively. The control device 33 compares the determination result notification signals k1 to k3 from the determination devices 32a to 32c and determines the data compression algorithm with the highest compression efficiency, that is, the determination device 3 in this case.
The algorithm of 2b is selected, and the algorithm is notified to the data compression device 35 as a selection result notification signal m. The data compression device 35 rearranges the mobile station number group b sent from the data storage device 31 in the same manner as in FIG. 5, and performs data compression according to the data compression algorithm of the selection result notification signal m from the control device 33. To do. When the data is compressed, a common element identifier similar to that of the embodiment of FIG. 1, the number of mobile station numbers corresponding to the identifier, and a 5-digit number element obtained by removing the common element from each mobile station number are a series of data. The line is edited and sent to the transmitter 36 as a transmission call signal d. After sending, the data compression device 35 sends the transmission permission signal e to the data storage device 31. The subsequent operation and the operation of the mobile station are the same as those in the embodiments of FIGS. 1 and 2.

Further, in the control device 33, the judging device 32
When comparing the determination results from a to 32c, if the determination results do not achieve a certain compression efficiency or more, the control device 33 selects a signal indicating that data compression is not required for the data compression device 35. It is sent as a result notification signal m. When the data compression device 35 receives the selection result notification signal m, it sends the mobile station number group b from the data storage device 31 to the transmitter 36 as a transmission call signal d as it is.

[0016]

As described above, the radio paging system of the present invention uses a mobile station number with a smaller number of bits as compared with the conventional system in which the mobile station paging request signal arriving at the radio base station is directly sent to the paging channel. Can be transmitted, and thereby more mobile station numbers can be accommodated in the calling channel, which has the effect of improving the utilization efficiency of the wireless channel. In addition, by detecting only the common element of the mobile station number and the common element identifier, it is possible to realize intermittent reception during the standby time of the mobile station, reduce power consumption, and reduce size and weight. It also has an effect.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a base station in a radio calling system of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of a mobile station in the radio calling system of the present invention.

FIG. 3 is a block diagram showing an embodiment of a method of changing a data compression algorithm in another embodiment of the base station in the radio calling method of the present invention.

FIG. 4 is a diagram showing an example of mobile station number groups in the radio calling system of the present invention.

FIG. 5 is a determination device 3 in the radio calling system of the present invention.
And a diagram showing a result of rearranging the mobile station number group of FIG. 4 in the data compression device 4.

FIG. 6 is a diagram showing a result of data compression performed on the rearrangement result of FIG. 5 by the data compression device 4 in the wireless calling system of the present invention.

FIG. 7 is a diagram showing a determination result by the determination device c1 in the embodiment of the method of changing the data compression algorithm in the wireless calling method of the present invention.

FIG. 8 is a diagram showing a determination result by the determination device c2 in the embodiment of the method of changing the data compression algorithm in the wireless calling method of the present invention.

FIG. 9 is a diagram showing a determination result by the determination device c3 in the embodiment of the method of changing the data compression algorithm in the wireless calling method of the present invention.

[Explanation of Codes] 10 base station 11 data storage device 12 counter 13 determination device 14 data compression device 15 transmitter 16, 23 antenna 20 mobile station 21 receiver 22 external notification device a mobile station call signal b mobile station number group c data Compressible notification signal d Transmission calling signal e Transmission permission signal f Timer signal g Reception calling signal h Notification signal

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication H04Q 7/38

Claims (2)

(57) [Claims] 1. A mobile communication system comprising a plurality of mobile stations and at least one base station, and means for counting a predetermined fixed time,
Means for accumulating a mobile station call request signal group that has arrived within the fixed time, and an identifier added to a common element of the mobile station call request signal group, and the common element from the common element and individual mobile station call request signals From each of the number element except for the radio base station having means for editing into a series of data strings, means for transmitting the data string to the radio by one transmission command, the identifier and the number element A radio calling system, comprising: a mobile station having a means for decoding its own station number and a means for turning off at least a part of the power source while the own station is not called. 2. The radio base station rearranges the mobile station number data group sent from the data storage device into a fixed rule and determines whether or not data compression is possible according to an algorithm predetermined by the system. The radio paging system according to claim 1, further comprising a determining means for performing the call.