JPH0654894B2 - Encoder - Google Patents

Description

The present invention relates to an encoding device used in a radio paging system.

[Conventional technology]

A base station configuration using a conventional encoding device is shown in FIG. The conventional radio paging system uses an intermittent reception method.
That is, the subscriber is divided into a plurality of groups, and the paging signal is transmitted in a time slot corresponding to each group. FIG. 3 shows the configuration of a calling signal from the base station. Here, the case is divided into n groups G1 to Gn, and the subscriber turns on the power only for a time corresponding to the own group.

When making a call in the conventional method, first, a radio call number is input from the subscriber telephone 10. This is usually a number similar to the subscriber telephone number. This connects the call to the terminating device 20. In the receiving device 20, the presence or absence of the radio call subscriber corresponding to the entered number is checked in the storage device in the device, and if the subscriber is not registered, an announcement is made.
Notify that the subscriber does not exist. On the other hand, if the subscriber is registered, the encoder 30 is checked whether or not there is a space in the input buffer 37 for storing the calling signal, and if there is a space, the call is accepted and the acceptance is completed. At the same time, the received calling number is sent to the encoding device 30. On the other hand, if there is no free space in the input buffer 37, this call is waiting.

The encoding device 30 has an input buffer 37 that is provided in common for all call numbers to temporarily store the call numbers received from the receiving device 20, and a transmission wait that is provided for each group after grouping the call numbers. Multiple output buffers for 35
When there is an inquiry from the receiving device 20 about the presence or absence of an input buffer space, the buffer status monitoring unit 34 confirms the availability of the input buffer 37 at the time of the inquiry,
The response is returned to the receiving device 20. As a result, the receiving device 20 sends the calling number to the encoding device 30 or waits as described above.

When the sending buffer has a free space, the calling number input from the receiving device 20 to the encoding device 30 is temporarily stored in the input buffer 37. Next, the encoding device 30 is a group identification unit 31,
The calling number in the input buffer 37 is read, the group to which this calling number belongs is identified, and the group is input to the sending buffer 35 of the corresponding group. At this time, if there is no space in the transmission buffer 35 of the corresponding group, the calling number will be waited in the input buffer 37. The calling number input to the sending buffer 35 is read by the sending control unit 36 in the time slot assigned to the corresponding group (since radio calling is performed by intermittent reception by grouping subscribers, the group and the time slot are assigned. Correspond to each other), and is sent to the interface device 40 that takes an interface for sending to the transmitter.

[Problems to be solved by the invention]

The conventional encoding device described above has the following problems.

First of all, since the input buffer 37 is provided in common to all groups, when the calling number belonging to a certain group is intensively called, the sending buffer 35 of the group becomes full, and accordingly, the sending buffer 35. The input buffer 37 may be occupied by the call number belonging to the group that cannot be input to the input buffer 37. That is, because the calls that belong to a certain group are concentrated, the send buffer
There is a vacancy in 35, which means that the calling number belonging to another group cannot be accommodated in the input buffer 37, and the capacity of the input buffer 37 becomes a bottleneck even if the signal output from the encoder 30 has a vacancy. Will not be accepted.

Secondly, the acceptance of the incoming call is determined based on the availability of the input buffer 37 which is not related to the group. Therefore, when there is a centralized call to a specific group, the encoding device 30 cannot selectively set only the calling number belonging to the group as the reception waiting regulation. Therefore, when there is a concentrated call, the congestion state of a specific group is likely to spread to the entire device.

Third, if the buffer status monitor 34 confirms that the input buffer is empty, and if it takes time for the call that has started accepting to complete acceptance, acceptance is completed despite the availability at the start of acceptance. At that point, the vacancy may be used by another call that was accepting at the same time. In this case, since the accepted call cannot be sent to the coding device 30, the receiving device 20 either discards the accepted call or sends the call to the coding device 30 until the call is sent for a long time. You will be burdened with repeated retries.

It is an object of the present invention to provide a coding device in a radio paging system which can improve communication, improve service reliability and reduce system load by solving the above problems.

[Means for solving problems]

The present invention is directed to a group identification section for identifying a group of calling numbers received from a subscriber by a receiving device, a plurality of sending buffers for storing the calling numbers for each group, and the callings stored in the sending buffers. In a coding apparatus in a radio paging system including a transmission control section for coding and transmitting a selective calling signal by reading the number in accordance with a predetermined time slot, the calling number transmitted from the group identification section is Input processing means for sending to the send buffer when the send buffer has a free space according to the send buffer monitoring information, and temporarily storing when there is no free space, and sending when the send buffer has a free space again, and each of the above send The availability of the buffer is monitored, the sending buffer monitoring information is sent to the input processing means, and Instruction information to stop a new acceptance of the call numbers belonging to the group when there is no space in the output buffer, characterized in that it comprises a monitoring means for transmitting to said incoming device.

[Action]

The monitoring means monitors whether or not there is a vacancy in each sending buffer, and sends the sending buffer monitoring information to the input processing means.
In the input processing means, if there is a vacancy in the transmission buffer, the calling number input from the group identification section is transmitted to the transmission buffer based on the transmission buffer monitoring information.
If there is no vacant space, it is temporarily stored in the storage section, and when there is a vacant space in the transmission buffer, it is taken out and transmitted. Then, when there is no free space in the transmission buffer for a long time, or when there is no free space in the storage unit, reception stop instruction information for stopping new reception of the calling number of the group is given to the receiving device. To send. Accordingly, the receiving device stops accepting the calling number of the group.

Therefore, the reception and encoding of the call number are processed according to the empty state of each transmission buffer, and the communication is improved by not depending on the specific group in which the call is concentrated, improving the reliability of the service and the system. It is possible to reduce the load.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a base station according to an embodiment of the present invention. In this embodiment, the subscriber 10, the receiving device 20 that receives the calling number from the subscriber 10, the calling numbers received by the receiving device 20 are divided into groups, which are encoded into selective calling signals and assigned to the groups. And an interface device 40 of a transmitter for modulating the output from the encoding device 30a into a radio signal and transmitting the radio signal.
Includes and.

Then, the encoding device 30a determines the group identification unit 31 for identifying the group of the calling number received by the receiving device 20 from the subscriber 10 and the calling number transmitted from the group identification unit 31 according to the transmission buffer monitoring information. An empty waiting buffer 32 and an input processing unit as input processing means for transmitting to the transmission buffer when there is space in the transmission buffer, temporarily storing when there is space in the transmission buffer, and transmitting when there is space in the transmission buffer again. 33 and each output buffer 35a
Whether there is a vacancy, and sends the sending buffer monitoring information to the vacant waiting buffer 32 and the input processing unit 33, or when there is no vacancy in the sending buffer, accepts a new call number belonging to the group. It includes a buffer state monitoring unit 34a as a monitoring means for sending the instruction information to stop to the receiving device 20.

The feature of the present invention resides in that in FIG.
The input processing unit 33 and the buffer state monitoring unit 34a are provided.

Next, the operation of this embodiment will be described. The calling number input from the subscriber telephone 10 to the encoding device 30a via the receiving device 20 is first identified by the group identification unit 31 to which group of the plurality of groups the called subscriber belongs, and then input. It is sent to the processing unit 33. In the input processing unit 33, the transmission buffer monitoring information from the buffer status monitoring unit 34a is used to determine the transmission buffer 35a of the group to which the calling number belongs.
To see if there is a vacancy, and if there is a vacancy, enter this calling number into the corresponding output buffer 35a. If there is no vacancy, the vacant number provided to hold the calling number until there is a vacancy in the transmission buffer 35a. Input to the wait buffer 32. The calling number input to the sending buffer 35a is read by the sending control unit 36 at a timing such that the calling number is sequentially sent from the transmitter in the time slot assigned to each group, and sent to the interface device 40 of the transmitter. To be done.

The buffer status monitoring unit 34a uses the transmission buffer 3 of each group.
The presence / absence of 5a is regularly monitored, and in response to an inquiry from the input processing unit 33, whether or not input to the transmission buffer 35a is possible for each group, the incoming call device 20 also accepts an incoming call for each group. Notify whether or not. Based on this notification, the receiving device 20 confirms whether or not there is a subscriber,
The group to which the call number belongs is determined to determine whether or not to start accepting this call. Further, the buffer status monitoring unit 34a notifies the input processing unit 33 of which group has a free space when the send buffer 35a is changed from a free space to a free space. In the input processing unit 33, when there is a calling number belonging to the relevant group among the calling numbers stored in the empty waiting buffer 32, this is transferred to the sending buffer 35a.

In the system using the coding apparatus of the present embodiment, even if there is a concentrated call for a specific group, it is difficult to spread this call to other groups, and it is possible to avoid wasteful use of the transmission signal from the transmitter. In addition, even if the receiving device has a long reception time, by using the empty waiting buffer, the called number that has been completely received disappears without being sent, and it is unnecessary for the receiving device to retain it. It can also avoid imposing loads.

〔The invention's effect〕

As described above, according to the present invention, it is possible to realize a radio paging system in which the communication is improved, the reliability of services is improved, and the load on the system is reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a base station using an encoding device according to an embodiment of the present invention. FIG. 2 is a block diagram showing a base station using a conventional coding device. FIG. 3 is an explanatory diagram showing the structure of a calling signal. 10 ... Subscriber, 20 ... Incoming device, 30, 30a ... Encoding device, 31 ... Group identification unit, 32 ... Empty waiting buffer, 33
...... Input processing unit, 34, 34a …… Buffer status monitoring unit, 35, 3
5a ... Sending buffer, 36 ... Sending control unit, 40 ... Interface device.

Claims (1)

[Claims] 1. A group identification unit (31) for identifying a group of calling numbers received from a subscriber (10) by a receiving device (20), and a plurality of transmission buffers (M) for storing the calling numbers for each group. 35a) and a transmission control unit (36) for encoding and transmitting the selective call signal by reading out the call number stored in each transmit buffer in accordance with a predetermined time slot and encoding in a radio call system In the device (30a), the calling number sent from the group identification unit is sent to the sending buffer when there is a space in the sending buffer according to the sending buffer monitoring information, and temporarily stored when there is no space. The input processing means (32, 33) for sending out when the buffer becomes empty again, and the presence or absence of empty space in each of the above-mentioned sending buffers are monitored, and the sending buffer monitoring is performed for the input processing means. Monitoring information (34a) for transmitting the visual information and transmitting to the receiving device instruction information for stopping new reception of the calling number belonging to the group when the transmission buffer is full. Characteristic encoding device.