JPH118599A - Method and device for controlling access - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve overall transmission efficiency by enabling each slave station to know its own allocation slot, based on new slot information according to a dispatch relation and transmitting information to be sent to a master station, while using its own allocation slot. SOLUTION: An idle line discrimination part 1 monitors information from the slave station and discriminates whether it is an idle line or not. At a TDMA slot information conversion part 3 in the master station, a frame cycle is predetermined, preassign TDMA slot information predetermined in the head of frame by a preassign TDMA slot information generating part 2 is selected and outputted to a multiplexer part 4, and all the preassign TDMA slot information is distributedly transferred to all the slave stations. At the slave station, the preassign TDMA slot information distributedly transferred is received by a preassign TDMA slot information receiving part 5, and according to the received preassign TDMA slot information, up data waited at a FIFO part 7 are transmitted to the master station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a transmission mode in which a master station and a plurality of slave stations are star-type, bus-type or one-to-one connection, but logically share a line. And an apparatus for controlling access when divided use is performed by slave stations.

[0002]

2. Description of the Related Art FIG. 26 shows a transmission mode in which a master station and a plurality of slave stations share a line in a star configuration.
1 is a configuration diagram showing a subscriber line to which a conventional access control method and its device are applied in which one logical line is divided and used by a plurality of slave stations, in which 100 is a slave station, and 101 is a master station. In the conventional access control method and its device, for example, as disclosed in Japanese Patent Laid-Open No. 2-10926, when performing communication using a multiple access channel, a master station is fixed to each slave station. The parent station dynamically allocates a slot in response to a reservation request of a child station, or the parent station dynamically allocates a slot in response to a reservation request of the child station, and uses the reserved slot to Stations can be broadly classified into two types of demand assignment systems for transmitting data. In particular, in the technique disclosed in Japanese Patent Application Laid-Open No. 2-10926, one of the pre-assignment method and the demand assignment method is determined for each time slot to increase transmission efficiency.

[0003]

Since the conventional access control method and the conventional access control apparatus are configured as described above,
For subscriber lines where voice is the mainstream, it is sufficient to provide a pre-assignment method that always secures the line capacity up to the local exchange, and to perform demand access on a call-by-call basis for parts that require higher transmission efficiency. However, when the transmission capacity such as computer communication changes every moment, there is almost no access to the network in some cases, and in some cases it is necessary to send and receive a large amount of data via the network, the pre-assignment method In the demand access method, the transmission efficiency is not expected to increase, and the transmission path length is long even in the demand access method. If the amount to be transmitted changes every moment, the time required for the demand processing becomes longer. There were issues that could not be expected to improve.

In addition, if there is no data to be transferred even if the line capacity is secured once on demand, there is a problem that the time during which valid information does not flow on the line increases and the line is not used effectively.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an access control method and an access control method capable of improving transmission efficiency in a multiple access channel for highly bursty traffic such as computer communications. The aim is to obtain a device.

[0006]

According to the first aspect of the present invention, there is provided an access control method, wherein slot information about a slot to be allocated to each slave station is fixedly set in advance.
Determine an idle line by communication performed between the slave station and the master station based on the set slot information, based on idle line information about the determined idle line,
With respect to the set slot information, a transfer relationship for transferring a slot assigned to the slave station determined to be the idle line to another slave station is set, and new slot information according to the set transfer relationship is set. , Each slave station knows its own assigned slot, and transmits information to be sent to the master station using the own assigned slot.

The access control method according to the second aspect of the present invention provides a method for controlling the idle state of a line transmitted from each slave station to a master station using a slot learned based on slot information fixedly set in advance. The idle line is determined by the information, and based on the idle line information about the determined idle line, the fixedly set slot information is assigned to the slave station determined to be the idle line. Setting of the transfer relationship when transferring a slot to another slave station is performed on the master station side, and each slave station knows its own assigned slot based on slot information according to the transfer relationship,
The information to be sent to the master station is transmitted using the self-assigned slot.

According to the third aspect of the present invention, there is provided an access control method for a line which is transmitted from each slave station to a master station using a slot learned based on slot information fixedly set in advance. The idle line is determined by the information, and based on the idle line information on the determined idle line, the fixedly set slot information broadcast from the master station is determined as the idle line. The setting of the transfer relationship for transferring the slot allocated to the assigned slave station to another slave station is performed in each slave station, and by knowing the self-assigned slot according to the transfer relationship, each slave station performs The information to be sent to the master station is transmitted using a slot.

According to a fourth aspect of the present invention, there is provided an access control method, comprising: using a slot known based on slot information fixedly set in advance, to idle a line transmitted from each slave station to a master station. Detecting information, determine the idle line on the slave station side based on the detected idle information, for the fixedly set slot information broadcast from the master station based on the determination result, A setting of a transfer relationship when transferring a slot assigned to the slave station determined to be the idle line to another slave station is performed on the slave station side, and each slave station knows its own assigned slot according to the transfer relationship. , The information to be sent to the master station is transmitted using the self-assigned slot.

[0010] In the access control method according to the fifth aspect of the present invention, the effective information included in the cell transmitted from the slave station to the master station using the slot based on the slot information fixed in advance is used. This is such that identification information indicating that it does not exist is used as idle information for determining an idle line.

In the access control method according to the present invention, the first slot information about the slot to be allocated to each slave station is fixedly set in advance, and based on the detected information amount of each slave station. The remaining amount of information remaining in the slave station at the end of the next frame is predicted, second slot information is generated based on the remaining amount, and the first slot information or the second slot information of the second slot information is generated. Selecting one of them, based on the selected first slot information or the second slot information, each of the slave stations knows its own assigned slot,
The information to be sent to the master station is transmitted using the self-assigned slot.

In the access control method according to the present invention, the remaining amount of information to be transmitted remaining in each slave station is detected at the end of a frame, and information flowing into each slave station per frame is detected. The amount is detected, and the remaining amount of information remaining in the slave station at the end of the next frame is predicted based on the remaining amount and the inflow amount.

In the access control method according to the present invention, the remaining amount of information to be transmitted remaining in each slave station is detected at the end of a frame, and the next frame is determined based on the detected remaining amount. This is to predict the remaining amount of information remaining in the slave station at the end.

According to a ninth aspect of the present invention, in the access control method, an inflow amount of information flowing into a slave station is detected, and information on the detected inflow amount is sequentially stored together with identification information of the slave station. On the basis of the information on the inflow amount, slot allocation information of slots to be allocated to the respective slave stations is generated in accordance with the order, and based on the generated slot allocation information for each of the slave stations, The slave station knows the self-use slot allocated to itself and transmits information to be transmitted using the self-use slot.

In the access control method according to the present invention, the transmission timing is delayed until the slot carrying the information to be transmitted arrives based on the slot allocation information for each slave station. .

The access control apparatus according to the present invention is characterized in that: slot information setting means for fixedly setting slot information on slots to be allocated to each slave station in advance; and the slot information set by the slot information setting means. A first broadcast means for broadcasting to each of the slave stations, and a communication between the slave station and the master station based on the slot information broadcast to each of the slave stations by the first broadcast means. Idle line determination means for determining an idle line by communication performed between the, based on idle line information about the idle line determined by the idle line determination means, for the slot information set by the slot information setting means, A slot assignment relationship for setting an assignment relationship for assigning a slot assigned to a slave station determined to be the idle line to another slave station. Setting means, based on new slot information according to the transfer relationship set by the slot transfer relationship setting means, each of the slave stations knows its own assigned slot, and sends information to be sent to the master station to the own assigned slot. And a transmission means for transmitting the data by using the.

According to the twelfth aspect of the present invention, there is provided an access control device, wherein each slave station sends a line to the master station using a slot learned based on the slot information set by the slot information setting means. Idle line determining means for determining an idle line based on information, based on idle line information on the idle line determined by the idle line determining means, based on the slot information set by the slot information setting means, the idle line Slot transfer relation setting means for setting a transfer relation for transferring a slot allocated to the determined slave station to another slave station;
A second step of broadcasting slot information according to the transfer relation set by the slot transfer relation setting means to the slave stations;
And each of the slave stations knows its own assigned slot based on the slot information broadcast to each of the slave stations by the second broadcast means, and uses the own assigned slot to Transmitting means for transmitting information to be transmitted to the master station.

According to the thirteenth aspect of the present invention, there is provided an access control apparatus, wherein each slave station uses a slot learned based on the slot information set by the slot information setting means to transmit a line idle to a master station. Idle line determining means for determining an idle line based on information; and a first information set by the slot information setting means based on the idle line information on the idle line determined by the idle line determining means.
With respect to the slot information broadcast from the master station by the broadcasting means, the setting of the transfer relationship for transferring the slot assigned to the slave station determined to be the idle line to another slave station is performed by each slave station. Slot transfer relationship setting means to be performed;
Based on the slot information according to the transfer relationship set by the slot transfer relationship setting means, each of the slave stations knows its own assigned slot and transmits information to be sent to the master station using the own assigned slot. And transmission means.

According to a fourteenth aspect of the present invention, there is provided an access control apparatus, wherein each slave station uses a slot learned based on the slot information set by the slot information setting means to transmit a line idle to the master station. Idle line determination means having idle information detection means for detecting information; determination means for determining an idle line on the slave station side based on the idle information detected by the idle information detection means; The slot information set by the slot information setting means broadcast from the master station by the first broadcasting means based on the determination result by the means, and the slot assigned to the slave station determined to be the idle line. Setting the transfer relationship when transferring to another slave station on the slave station side, and the slot transfer relationship setting means set by the slot transfer relationship setting device. Know each slave station itself assigned slots according pass relationship is using the self-assigned slot that so and transmission means for transmitting the information to be sent to the master station.

According to a fifteenth aspect of the present invention, there is provided an access control apparatus, wherein slot information setting means for fixedly setting first slot information for a slot to be assigned to each slave station in advance, and setting by the slot information setting means. Broadcasting means for broadcasting the first slot information and the like to each of the slave stations, information amount detecting means for detecting the information amount of each slave station, and the information amount detected by the information amount detecting means. Using a slot based on the first slot information set by the slot information setting unit and a remaining amount prediction unit for predicting the remaining amount of information remaining in the slave station at the end of the next frame. Slot information generating means for generating second slot information based on the information amount predicted by the remaining amount predicting means which each slave station sends to the master station; and the slot information setting means. Selecting means for selecting either the first slot information determined or the second slot information generated by the slot information generating means; and selecting the selected means and transmitting to each of the slave stations by the broadcasting means. Based on the reported first slot information or the second slot information, each slave station knows its own assigned slot and transmits information to be sent to the master station using the own assigned slot. And transmission means.

The access control device according to the invention of claim 16 is a slave station residual information detecting means for detecting the remaining amount of information to be transmitted remaining in each slave station at the end of a frame, and flowing into each slave station. Information amount detecting means including an inflow amount detecting means for detecting an inflow amount per frame of information to be obtained, the remaining amount detected by the slave station residual information detecting means, and the inflow amount detected by the inflow amount detecting means. And a remaining amount estimating means for estimating the remaining amount of information remaining in the slave station at the end of the next frame.

An access control device according to a seventeenth aspect of the present invention is an access control device, comprising: an information amount detecting means including a child station residual information detecting means for detecting the remaining amount of information to be transmitted remaining in each child station at the end of a frame. Based on the remaining amount detected by the slave station residual information detecting means, and a remaining amount predicting means for predicting the remaining amount of information remaining in the slave station at the end of the next frame. is there.

The access control apparatus according to the present invention is characterized in that an inflow amount detecting means for detecting an inflow amount of information flowing into a slave station, and information on the inflow amount detected by the inflow amount detection means. A slave station-side inflow amount transmitting unit that multiplexes and sends the slave station from the slave station to the master station according to the slot allocation information;
An inflow amount storing means for sequentially storing information on the inflow amount sent to the master station by the slave station side inflow amount transmitting means together with identification information of the slave station; and the inflow amount stored by the inflow amount storage means. Based on the information about, the slot allocation information generating means for generating the slot allocation information of the slot to be allocated to each slave station according to the order,
Master-station-side transmitting means for multiplexing the slot-assignment information generated by the slot-assignment-information generating means from the master station to each of the slave stations, and transmitting the slot-assigned information to the slave stations by the master-station-side transmitting means Each of the slave stations knows its own slot assigned to itself based on the slot allocation information, and has slave station transmitting means for transmitting information to be transmitted by the own slot. .

In the access control apparatus according to the nineteenth aspect of the present invention, each of the slave stations has a slot for carrying information to be transmitted, based on the slot assignment information for each slave station generated by the slot assignment information generating means. A delay means for delaying the transmission timing until arrival is provided.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which an access control method according to a first embodiment of the present invention is applied.
FIG. 2 is a block diagram showing a configuration of a master station, and FIG. In the figure, reference numeral 1 denotes an idle line determination unit (idle line determination means) in a master station that monitors information from a slave station and determines whether or not the mobile station is an idle line. TD in advance based on the situation
A pre-assignment TDMA slot information generation unit (slot information setting means) for determining a time slot for MA (Time Division Multiple Access) is used to allocate the idle line determined by the idle line determination unit 2 to another slave station. The TDMA slot information conversion unit (slot transfer relation setting means) 4 for converting the slot information
A multiplexing unit (first broadcast means, second broadcast means) for multiplexing DMA slot information into downlink data.

5 is a TDMA slot information receiving section of the slave station which receives the TDMA slot information broadcast by the master station, 6 is a delay section (delay means) for holding the received TDMA slot information up to a predetermined transmission phase, Reference numeral 7 denotes a FIFO unit (transmitting means) for storing upstream data in order to transmit data to the master station at the timing output from the delay unit 6.

Next, the operation will be described. In the TDMA slot information conversion section 3 in the master station, the frame period T is predetermined, and the pre-assignment T
A predetermined pre-assigned TDMA slot information is selected by the DMA slot information
And the pre-assigned TDMA slot information is distributed and transferred to all slave stations. In the slave station, the pre-assigned TDMA slot information receiving unit 5 receives the distributed and transferred pre-assigned TDMA slot information, and the uplink data waiting in the FIFO unit 7 is transmitted to the master station according to the received pre-assigned TDMA slot information. You. The method of distributing the pre-assigned TDMA slot information is as follows:
"Time slot allocation method in ATM-PDS, 1
993 IEICE Autumn Meeting B-668 ", a method of specifying each slot, or a method of collectively specifying a plurality of slots.

Uplink information is divided into blocks of information called cells, and information from the slave station to the master station is transferred in units of cells. A code that does not include valid information is defined in the cell, and the idle line determination unit 1 recognizes the idle cell by receiving the defined code at the master station. Further, the idle line determination unit 1 determines whether or not all the pre-assigned lines from the slave stations are idle lines by, for example, the following two methods. The first method is a case where n consecutive idle cells are detected, and the second method is a case where one or more idle cells out of k cells are received m times or more.

The idle line thus detected is T
In the DMA slot information conversion unit 3, a conversion table indicating the transfer relationship is created by, for example, a separately determined algorithm, the pre-assignment slot number is changed by this conversion table, and the idle line is changed to the transfer line.

FIG. 2 is a flowchart showing an example of the algorithm. As shown in this flowchart, the determination condition of step ST101 is satisfied at the beginning of the frame, and the contents of the conversion table are cleared by the subsequent step ST102. In this case, the TDMA slot information is the pre-assigned TDMA slot information generated by the pre-assigned TDMA slot information generator 2 shown in FIG.

When the idle line information Cid is detected by the idle line determination unit 1, the determination result of the step ST103 becomes "yes" with respect to the determination condition of step ST103, and the subsequent step ST
At 104, the conversion source idle line information Cid described in the conversion table is searched based on the idle line information Cid.
If it is not registered in the conversion table, it is determined that the line is a new idle line. On the other hand, if the idle line information Cid has already been registered as the conversion source idle line information Cid in the conversion table, the determination result for the determination condition of step ST104 is “No”, and no processing is performed. The determination result for the determination condition of step ST103 is “Yes”, and
If it is determined in step ST104 that the line is a new idle line, the pre-assign ID immediately before or after the pre-assign ID formed in the chain in step ST105.
Is detected as the transfer destination Nid of the idle line.

FIG. 3A shows an example of this chain configuration. In the example of FIG. 9A, it is assumed that six preassigned IDs of the child stations 1, 3, 5, 6, 7, and 8 are currently valid. In FIG. 3A, the chains are configured in the ascending order by the preassign ID, and the chain is configured such that the number following the last 8 is 1. In this case, a case is considered in which, when an idle line is detected, the next pre-assigned ID is defined as the transfer destination Nid of the idle line. For example, when the preassign ID 3 is detected as new idle line information Cid, the preassign ID of 5 is the transfer destination Nid of the idle line.

Returning to FIG. 2, in step ST106,
The detected idle line information Cid is stored in step ST10.
If it is determined that the line coincides with the transfer destination Nid in step 5, it means that all the pre-assigned lines have been recognized as idle lines through the chain configuration, and the process proceeds to the previous step ST107 to reset all the conversion tables. And set the pre-assignment.

On the other hand, the detected idle line information Cid
In step ST106, when it is determined in step ST106 that the transfer destination Nid does not match the transfer destination Nid in step ST105, it is determined whether the transfer destination Nid is already registered as a conversion source in the conversion table. I do. The case where the transfer destination Nid is already registered as the conversion source of the conversion table is a case in which the circuit has completed one cycle, and since the line has been transferred to the conversion destination of the conversion table, the transfer destination Nid is already registered as the conversion source. The transfer destination Ni already registered with the pre-assigned ID of the conversion destination of the idle line being used as the conversion source of the conversion table.
d.

FIG. 3B shows that all pre-assigned lines are recognized as idle lines and go around the chain configuration, and the detected idle line information Cid is transferred to the transfer destination Nid.
Is determined in step ST106 to indicate the state of the conversion table to be reset. That is, when all the pre-assigned lines are idle lines, the line with pre-assign ID 3 is first detected as new idle line information Cid, the line with pre-assign ID 5 becomes the transfer destination Nid of the idle line, and The line with assign ID 5 is the new idle line information Cid
And the line with the pre-assignment ID 6 becomes the transfer destination Nid of the idle line, and the transfer destination is determined in the same manner, and the circuit goes through the chain configuration. As a result, the line of pre-assign ID 1 is finally detected as new idle line information Cid, and the line of pre-assign ID 3 becomes the transfer destination Nid of the idle line. The transferee N
The line of the pre-assignment ID 3 which has become id has already been registered as the conversion source at the beginning of the conversion table. Accordingly, the determination result for the determination condition in step ST108 is “Yes”, and in step ST109, the conversion source: preassign ID3 for the conversion table: preassign ID3 is set to preassign ID3. As a result, the determination result for the determination condition in step ST106 is “Yes”, and the conversion table is reset in step ST107.

If the determination result of step ST108 is "No", the process proceeds to step ST110, and the conversion source is written into the conversion table as Cid and the conversion destination as the transfer destination Nid found at step ST105.

As a result, the conversion table for transferring the detected idle line to the transfer destination Nid of the non-idle line is updated.

As described above, in the first embodiment, the TDMA slot of the idle line is changed to the pre-assigned slot number of the transfer destination line, assigned to the slave station via the multiplexing unit 4, and transferred. In the slave station, the bandwidth due to the transferred line increases, the transmission efficiency increases, and the effect of obtaining an access control method and an access control device that also improves the overall transmission efficiency between the slave station and the master station is obtained. is there.

Embodiment 2 FIG. 4 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the second embodiment of the present invention is applied. (B) is a block diagram showing a configuration of a slave station. 4, the same or corresponding parts as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In contrast to the first embodiment in which the TDMA slot converter 3 is provided in the master station, in the second embodiment, a TDMA slot information converter is provided in the slave station. In FIG. 4, reference numeral 3a denotes the TDMA slot information conversion unit (slot transfer relationship setting means), and 8 denotes an idle line information receiving unit for receiving idle line information Cid sent from the master station.

Next, the operation will be described. Idle line number Cid detected by idle line determination unit 1 of the master station
Are multiplexed by the multiplexing unit 4 and transferred to all slave stations. On the slave station side, a pre-assigned TDMA slot receiving unit 5
Receives the pre-assigned TDMA slot, receives the idle line information Cid sent from the master station by the idle line information receiving unit 8, and outputs the idle A transfer line Nid for the idle line in the line information Cid is determined, and the line is transferred.

As described above, in the second embodiment, since the TDMA slot information exchange section 3a is provided in the slave station, the load of the master station in the first embodiment is reduced.
The effect of reducing the DMA slot information conversion function and obtaining an access control method and an access control device capable of shortening the processing time of the master station, which becomes a problem when many slave stations are connected to one master station, is obtained.

Embodiment 3 In the second embodiment, T
Although the function of the DMA slot information conversion unit is realized on the slave station side, in the third embodiment, an idle line determination unit is further provided on the slave station side. FIG. 5 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the third embodiment of the present invention is applied. (B) is a block diagram showing a configuration of a slave station. 5, the same or corresponding parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 5, reference numeral 9 denotes an idle cell detector for detecting an idle cell on the master station side; 1a, an idle line determination section (determination means) provided on the slave station side; It is an information receiving unit.

Next, the operation will be described. In the third embodiment, the idle cell detector 9 detects an idle cell in the master station, and further multiplexes information on whether or not an idle cell has been detected in the multiplexer 4, and transfers the information to the slave station. On the slave station side, the transferred information is received by the idle cell information receiving unit 10, and the idle line determining unit 1a determines which line is the idle line. The determination of the idle line is performed by one of the two methods described in the first embodiment. Then, similarly to the second embodiment, the TDMA slot information conversion unit 3a determines the transfer line Nid for the idle line Cid by the same algorithm as that described in FIG. 2 of the first embodiment, and realizes the transfer of the line.

As described above, in the third embodiment, since the TDMA slot information exchange unit 3 is provided in the slave station, the TD which is a load on the master station in the first embodiment is used.
Since the MA slot information conversion function is reduced in the same manner as in the second embodiment, and the idle line determination unit 1a is provided in the slave station, the idle line is determined on the slave station side, and the processing is dispersed. There is an effect that an access control method and an access control device that can further reduce the processing time of the master station, which is a problem when many slave stations are connected to one master station, are obtained.

Embodiment 4 As described above, in the first to third embodiments, the TDMA that defines the transfer line is used.
For example, the slot information conversion unit 3 forms a chain from preassigned IDs of line numbers, and transfers the detected idle line to the line of the preassigned ID one before or one based on the chain configuration. However, in the fourth embodiment, the highest load line having the highest load in the pre-assignment assignment state or the line assignment state after transfer is determined by monitoring information from the slave station at the master station. Then, the transfer line Nid is determined for the highest load line. in this way,
Since the line can be transferred to a line with a higher load, higher transmission efficiency can be improved.

FIG. 6 is a block diagram showing a main configuration of a master station of an access control apparatus to which the access control method according to the fourth embodiment of the present invention is applied. In FIG. 6, the same or corresponding parts as those in FIG. In FIG. 6, reference numeral 11 denotes a highest load line detecting unit for detecting a highest load line based on information from a slave station, and 19 denotes a TDMA slot information conversion for determining a transfer line Nid for the highest load line detected by the highest load line detecting unit 11. Department.

FIG. 7, FIG. 8, and FIG. 9 are block diagrams showing each configuration for realizing the function of detecting the highest load line by the highest load line detection unit 11, and FIG. With the configurations shown respectively, the highest load line can be detected. In FIG. 7, reference numerals 12 and 13 denote idle cell counting units for monitoring and counting idle cells to be transferred when there is no valid information for each of the child stations, and 14 denotes an idle cell counting unit 12 or 13. It is a minimum value detection unit that detects the minimum value among the counted numbers of the idle cells, that is, the child station of the idle cell that is the least among the currently used child stations.
In FIG. 8, reference numerals 15 and 16 denote valid cell counting units for monitoring and counting valid cells other than idle cells for each slave station, and reference numeral 17 denotes a count of valid cells counted by each of the valid cell counting units 15 and 16. Is the maximum value, that is, the maximum value detection unit that detects the slave station having the largest number of valid cells among the slave stations currently used. In FIG. 9, 1
8 calculates the maximum cell coverage expressed by the number of valid cells with respect to all cells (total of valid cells and idle cells) from the count numbers of both idle cells and valid cells used in FIGS. 7 and 8. This is the maximum cell capacity detection unit to be obtained.

Next, the operation of the master station and the TDMA slot information converter 19 of the master station according to the fourth embodiment will be described. When the highest load line detection unit 11 detects the highest load line by the method shown in FIG. 7, the TDMA slot information conversion unit 19 outputs a The line of the slave station having the least number of idle cells is the highest load line. When the highest load line detecting unit 11 detects the highest load line by the method shown in FIG. The line of the slave station of the largest valid cell is the highest load line. When the highest load line detection unit 11 detects the highest load line by the method shown in FIG. 9, the TDMA slot information conversion unit 19 outputs Of these, the line of the slave station having the highest cell capacity is set as the highest load line.

In the master station, the highest load line detecting unit 11 detects the highest load line based on the information from the slave station by one of the methods shown in FIGS. 19, the TDMA slot information is changed so that the idle line detected by the idle line determination unit 1 is transferred to the slave station of the detected highest load line. The configuration of the slave station is the same as that of FIG. 1 shown in the first embodiment, and the operation is also the same.

In FIGS. 7, 8 and 9, once,
When the next highest load circuit is determined after the highest load circuit is determined, the method of including the once determined highest load circuit as a candidate for the next highest load circuit, or all the remaining circuits that are not determined as idle circuits, are determined. A method of not recognizing the second highest load line once for the highest load line once determined as the highest load line may be considered as an option.

As described above, in the fourth embodiment, since the idle line is transferred to the slave station of the highest load line detected by the highest load line 11, the idle station is transmitted to the slave station transmitting the largest amount of information. The line is transferred, the bandwidth of the line of the slave station is widened, and an access control method and an access control device capable of accurately improving the transmission efficiency of the slave station having the largest amount of information and the overall transmission efficiency can be obtained.

Embodiment 5 FIG. In the fourth embodiment, the detection of the highest load line is determined by monitoring information from the slave station in the master station, but in the fifth embodiment,
The slave station notifies the master station of the remaining amount of information in the slave station,
The master station determines a transfer line based on the notification of the remaining amount.

FIG. 10 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the fifth embodiment of the present invention is applied. In FIG. 10, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 10, reference numeral 20 denotes a remaining amount extracting / comparing unit (slave station residual information detecting means) provided at the master station for comparing the remaining amount transmitted from each slave station at the beginning of a frame.
It is. Reference numeral 21 denotes an upstream FIFO unit 7 at the end of a frame.
The end-of-frame remaining amount monitor unit (slave-station residual information detecting means) provided on the slave station side for monitoring the amount of information remaining in the slave station. A multiplexing unit (transmitting means) for multiplexing the data on the amount of the remaining information to notify the master station of the amount of the remaining information.

Next, the operation will be described. In the slave station, the remaining amount of information stored in the upstream FIFO unit 7 at the end of the frame or the like is monitored by the remaining amount monitoring unit 21 at the end of the frame, and slots for notifying the slave stations sequentially are allocated from each slave station. The multiplexing unit 22 multiplexes data on the remaining amount to notify the master station of the remaining amount.

The master station compares the remaining amounts transmitted from the respective slave stations at the beginning of the frame and ranks the load lines. There are many possible ways of assigning a priority. For example, priorities are assigned by the following method, and the TDMA slot information converter 19
Assigned in. There are, for example, the following four methods as the allocation method based on the transmitted remaining amount. (1) Order of increasing remaining amount * coefficient (2) Order of increasing amount of (remaining amount * coefficient-1 frame allocation amount) (3) Order of increasing (remaining amount * coefficient / 1 allocation amount of frame) (4) ( Remaining amount * coefficient-allocated amount of frame) * coefficient / 1
(The amount of allocated frames). The method (1) evaluates the remaining amount in descending order, and the method (2) multiplies the remaining amount by an appropriate coefficient to subtract the allocated amount of one frame. The remaining amount after one frame is predicted by subtracting the allocated amount of one frame by prediction. In the method of (3), since the method of (1) is multiplied by a coefficient and divided by the allocated amount of one frame, the remaining amount is the amount when normalized by the allocated amount.
The method of (4) is a value obtained by normalizing the method of (2) by the assigned amount.

In the fifth embodiment, similarly to the fourth embodiment, when the highest load line is once determined and then the next highest load line is determined, the once determined highest load line is replaced with the next highest load line. A new method is obtained by subtracting the capacity value of the transferred line or the value obtained by multiplying the value by a specific coefficient from the value in the above method (1), (2) or (3). There is a method of determining the evaluation value and changing the priority.

As described above, in the fifth embodiment, based on the amount of information remaining in the upstream FIFO unit 7 at the end of a frame monitored by the frame end remaining amount monitor unit 21, The remaining amount comparing section 20 of the station compares the remaining amount transmitted from each slave station at the beginning of the next frame, assigns a priority to the load line based on the comparison result, and sets the idle order in descending order of the priority. Since the transfer destination of the line is determined,
An access control in which the idle line is transferred in the order of the slave stations having a large amount of information to be transmitted, and the bandwidth of the line of the slave station is widened, and the transmission efficiency of the slave station having a large amount of information and the overall transmission efficiency can be accurately improved. There is an effect that a method and an access control device can be obtained.

Embodiment 6 FIG. In the fifth embodiment, at the end of a frame in the slave station, the remaining amount of the FIFO unit 7 is monitored and transferred to the master station, and a line which is considered to have the highest load is determined based on this information. In the sixth mode, the inflow amount of the FIFO unit 7 of the slave station per frame is further monitored, and the remaining amount of the FIFO unit 7 at the end of the next frame is predicted based on the inflow amount and the remaining amount. Estimate the high load line by transferring to the master station.

FIG. 11 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the sixth embodiment of the present invention is applied. In FIG. 11, the same or corresponding parts as in FIGS. 1 and 10 are denoted by the same reference numerals, and description thereof is omitted. In FIG.
Reference numeral 23 denotes an inflow amount monitoring unit (inflow amount detecting means) for measuring an inflow amount x into the FIFO unit 7 of one frame, and reference numeral 24 denotes a remaining amount of the FIFO unit 7 monitored at the end of the frame by the remaining amount monitoring unit 21 at the end of the frame. a prediction operation unit (remaining amount estimating means) for estimating the estimated remaining amount y when nothing is transferred to the master station at the end of the next frame based on the inflow amount x monitored by the inflow amount monitoring unit 23 ).

Next, the operation will be described. At the end of the frame, the remaining amount b of the FIFO unit 7 is detected, and the inflow amount x is measured. The prediction calculation unit 24 predicts a predicted remaining amount y when nothing is transferred to the master station at the end of the next frame based on these two measured values. The prediction of the predicted remaining amount y is performed by applying, for example, linear prediction, by multiplexing the predicted remaining amount y determined by y = a × x + b, where a is the prediction coefficient, b is the remaining amount, and x is the inflow amount. Multiplexing unit 22 for multiplexing.

The master station assigns priorities to the slave stations in the same manner as in the fifth embodiment based on the predicted remaining amount y transmitted from the slave station at the beginning of the frame. Each time an idle line is determined by the idle line determination unit 1 in the same manner as in 5, the idle line is allocated to a slave station having a higher priority, thereby improving the overall transmission efficiency.

In the sixth embodiment, the estimated remaining amount y when nothing is transferred to the master station at the end of the next frame, which is obtained by linear prediction from the remaining amount b of the FIFO unit 7 and the inflow amount x, is calculated. At the beginning of the next frame, the priority given to each slave station when transferring the idle line to the slave station is determined. It is possible to accurately determine the information amount and the load amount of the line, and to set a higher priority to a slave station having a larger information amount and the load amount to increase the bandwidth for the slave station. There is an effect that an access control method and an access control device capable of appropriately improving transmission efficiency by a priority order according to the load amount can be obtained.

Embodiment 7 FIG. In the first to sixth embodiments, only the line determined to be an idle line by the idle line determination unit 1 of the master station is transferred to another slave station. Since idle traffic occurs due to idle cells during the line determination time, transmission efficiency may be reduced.

In the sixth embodiment, the remaining amount of the FIFO unit 7 of the slave station at the last time point of the next frame can be predicted. Therefore, in the seventh embodiment, the TDMA slot is used by using only the predicted remaining amount. The transmission efficiency can be improved by changing the assignment of.

FIG. 12 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the seventh embodiment of the present invention is applied. 12, parts that are the same as or correspond to those in FIG. 11 are given the same reference numerals, and descriptions thereof will be omitted. In FIG. 12, reference numeral 21 denotes a remaining amount monitoring unit at the end of a frame (information amount detecting means, slave station residual information detecting means); 23, an inflow amount monitoring unit (information amount detecting means, inflow amount detecting means); A TDMA slot information generating unit (slot information generating means) for generating TDMA slot information based on the remaining amount prediction value from the slave station received by the comparing unit 20; And pre-assign T
A selection unit (selection means) for selecting one of the TDMA slot information generated by the DMA slot information generation unit 2;
a is the pre-assigned TD selected by the selection unit 26
A multiplexing unit that broadcasts either the first slot information generated and set by the MA slot information generating unit 2 or the second slot information generated by the slot information generating unit 25 to each slave station. Reporting means). The configuration of the slave station is exactly the same as that of the sixth embodiment.

Next, the operation will be described. The remaining amount extraction comparing section 20 of the master station receives the predicted remaining amount value sent from the slave station, and the TDMA slot information generating section 25
The TDMA slot information is generated from the predicted remaining amount value.
FIG. 13 shows an example of this algorithm.

In FIG. 13, if the pre-assigned value of the n-th slave station is a _n and the predicted remaining value of the n-th slave station is x _n , the condition of step ST121 is not satisfied, that is, the predicted remaining value Is smaller than the total number of TDMA slots, this predicted remaining value is defined as the number of allocated TDMA slots.
There will be extra DMA slots. Then step ST
It is necessary to determine the TDMA slot allocation value by increasing the predicted remaining value by 122. Step ST121
Holds, that is, the sum of the predicted remaining amount values is TDMA
If the number is larger than the total number of slots, it is necessary to determine the TDMA slot allocation quantity by subtracting the predicted remaining amount value. FIG. 14 shows an example of a method of increasing and decreasing TDMA slots from these predicted remaining values.

FIG. 14 shows three methods. First, in the first method, in the case of increase, the number of time slots to be increased is divided by the number n of active slave stations, that is, y / n is allocated to each subscriber to increase the number of slots. Similarly, in the case of reduction, the number of slots of each slave station is reduced by y / n.

The second method is to sequentially select slave stations to be increased or decreased for each frame. FIG. 15 shows an example of an algorithm for this increase. In FIG. 15, first, an amount Y to be increased is defined in step ST124, and TD is determined in step ST125.
The initial value x _'n of MA slot allocation amount is the predicted remaining amount x _n of the n-th subscriber. In the determination of step ST126, Y is zero or less, i.e. if the number should be increased slot is eliminated, and ends the TDMA slot allocation amount as x _'n in step ST128. If Y is larger than zero, the process proceeds to step ST127, and the number of slots is increased by the maximum increment c per slave station in which the slots of the slave stations of the corresponding numbers are defined in advance by the chain shown in FIG. This operation is continued until Y becomes zero. When Y approaches zero and becomes smaller than the maximum increment c,
The increasing amount is not the maximum increasing amount c but the number of slots increases by the remaining amount of Y. If this is expressed by an equation, step S
This is shown by the processing formula shown in T127. Thus Y line is increased to the slave station number order until zero, it determined the assigned number x _'n of TDMA slots.

FIG. 16 shows an example of an algorithm for reducing the number of slots in the second method in FIG. In FIG. 16, the value of the number of slots Y to be reduced is represented by the processing equation of step ST129 since the sum of the estimated remaining amount is larger than the sum of the preassigned values. In step ST126, if Y is larger than zero, the assigned band is reduced to zero in the order determined by the slave stations. The value of Y is small, if it is smaller than predicted remaining amount x _'K number of slots is reduced by Y.

The first method and the second method in FIG. 14 are configured as described above, and the number of increase / decrease of the number of slots of all slave stations is considered to be equal on average. If the bandwidths are almost the same, they are assigned without unfairness to the slave station, but if the pre-assignment value changes significantly and the usage fee is set by the pre-assignment value, regardless of the pre-assignment value It is not preferable because the number of slots can be changed.

The third method solves this disadvantage. FIG. 17 shows an example of the case where the bandwidth is increased in the algorithm of the third method. The algorithm shown in FIG. 17 has a configuration similar to that of FIG. The difference is
In step ST125 in FIG. 15, by adding a definition of the difference D _n of the pre-assigned value of each slave station as in step ST131 in FIG. 17 and the prediction residual. If the number of allocated slots still needs to be increased in step ST126 (if Y is larger than zero), in step ST132, the smallest D _n ,
That is, a process of increasing the number of slots of the slave station assigned the smallest amount compared to the pre-assignment value by "1" is performed, and this process is repeated Y times in total, and all slots are assigned to each slave station. It is processing to go.

FIG. 18 shows an example of the case where the bandwidth is reduced in the algorithm of the third method. In the figure, as in the case of the second method, the amount of band reduction is represented by step ST129. Compared with the case of increasing the band in FIG. 17, when it is necessary to reduce the number of allocated slots in step ST126 (when Y is larger than zero), the largest D _n defined earlier in step ST134, that is, the pre-assignment is performed. The number of slots of the slave station assigned the largest amount compared to the value is "1".
This processing is repeated, and this processing is repeated a total of Y times, and all slots are allocated to each slave station.

Returning to FIG. 12, information on the number of TDMA slots determined by estimating the buffer amount in the slave station in such various methods becomes available as soon as it is determined.
Is selected and controlled.

FIG. 19 shows an example of the contents of the selection control. FIG. 19 assumes a case where an uplink signal from a slave station to a master station and a downlink signal from the master station to a slave station have logically different transmission paths. In addition, there are a plurality of slave stations and the arrangement positions are various, and the distance between the slave station and the master station is also different. A transmission control to delay the transmission is known. In FIG. 19, the above method is assumed and the timing of the farthest slave station is described as a representative.

In FIG. 19, reference numeral 140 denotes a transmission timing on the uplink of the slave station, 141 denotes a reception timing on the uplink of the master station, 142 denotes a transmission timing on the downlink of the master station, 1
Reference numeral 43 denotes a reception timing at the slave station downstream.

Here, the notification timing of TDMA slot information will be described. In FIG. 19, at time T1
In the predicted remaining amount counted by the slave station so far,
Notify for the number of slave stations. The time required for notification for the number of slave stations is W
Assuming that S1 and the delay time of the transmission path are S2, the master station finishes receiving these at time T4 after a lapse of (S1 + S2) time from time T1. The reception of is ended. Thereafter, in the period S3, the TDMA slot assignment is determined by the algorithm shown in FIG. 13 described above, and the determined information is distributed to each slave station at the time T5, or the time T5
Thereafter, the TDMA slot information is sequentially transferred, and each slave station receives the information. From time T6, the slave station transfers information in the uplink direction according to the TDMA slot assignment value.

According to this algorithm, in the uplink transmission from the slave station, at times T1 to T6, information cannot be transferred using the TDMA slot determined based on the estimated remaining amount. As a result, the operation of the selecting unit 26 in FIG. 12 is such that, at times T1 to T6, the transfer is performed according to the pre-assignment information predetermined in the pre-assignment TDMA slot information generating unit 2, and at other times, the TDMA by the above algorithm is performed. The TDMA slot information generated by the slot information generator 25 is selected.

As described above, in the seventh embodiment, the predicted FIF of the slave station at the end of the next frame is
The idle channel is determined by changing the TDMA slot allocation using the remaining amount of information to be transmitted by the O unit 7, eliminating the time required for the idle channel determination, and wasting traffic due to idle cells during the idle channel determination time. Thus, there is an effect that an access control method and an access control device that can avoid a decrease in transmission efficiency by eliminating the occurrence of the above problem can be obtained.

Embodiment 8 FIG. In the seventh embodiment, in the configuration of FIG. 12, the inflow amount monitoring unit 23 is provided, and the estimated remaining amount y determined by the equation, y = a × x + b is used as the estimated remaining amount. It is also possible to introduce exactly the same algorithm as in the seventh embodiment, using the calculation result of only the remaining amount described in 6 as the predicted remaining amount. In this case, although the accuracy of the predicted value is slightly deteriorated as compared with the seventh embodiment, the inflow amount monitor unit 23 becomes unnecessary, and the circuit scale can be reduced. FIG. 20 is a block diagram showing a main configuration of a master station and slave stations of an access control device to which the access control method according to the eighth embodiment of the present invention is applied. 20, parts that are the same as or correspond to those in FIG. 12 are given the same reference numerals, and descriptions thereof will be omitted. In FIG. 20, reference numeral 25 denotes the method (1), (2), (3),
The TDMA slot information generator 27 according to (4) predicts the remaining amount of information remaining in the slave station at the end of the next frame based on the remaining amount detected by the remaining amount monitoring unit 21 at the end of the frame. It is a prediction calculation unit (remaining amount prediction means).

The eighth embodiment has an effect that an access control method and an access control device that can reduce the circuit scale by eliminating the inflow amount monitoring unit 23 in the slave station are obtained.

Ninth Embodiment FIG. 21 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which an access control method according to a ninth embodiment of the present invention is applied. In FIG. 21, the same or corresponding parts as those in FIG. In FIG. 21, reference numeral 28 denotes an idle line storage unit for storing the number of an idle line when the idle line determination unit 1 determines an idle line; A TDMA slot information conversion unit (slot transfer relationship setting unit) that changes the allocation of the allocation slot generated by the assignment TDMA slot information generation unit 2 to a line that is not determined to be another idle line.

Next, the operation will be described. When the idle line determination unit 1 determines an idle line, the line number is stored in the idle line storage unit 28, and the TDMA slot information conversion unit 30 transfers the preassigned capacity of the idle line to another non-idle line and distributes it. Is done.

As a first method of distributing the pre-assigned capacity of the idle line in this case, there is a method of securing a fixed amount as the minimum capacity and equally distributing the remaining capacity to other non-idle lines. As a second method, there is a method of securing a fixed amount as a minimum capacity and distributing the remaining capacity in proportion to the preassign value of another non-idle line.

FIG. 22 is an explanatory diagram showing this first method. In FIG. 22, reference numeral 31 indicates a state in which respective values are indicated on the lines A to D as the pre-assignment capacity. Reference numeral 32 denotes the capacity of the lines A to D after the slot information conversion. Now, when the line A is determined to be an idle line, when the minimum capacity is set to 2, the line capacity of the line number A becomes 2. Of the pre-assigned capacity of the line A, twelve are equally distributed to the other lines B, C, and D, and each is increased by four. Thereafter, when information from the child station arrives on the line A and it is determined that the line is not idle, the line returns to the original allocated capacity as indicated by 31. The first method has a feature that, when there is an unused line, the remaining pre-assigned capacity excluding the minimum capacity of the line is equally distributed to other lines, so that the increase band is set to be fairly increased. .

FIG. 23 is an explanatory diagram showing the second method. In FIG. 23, 33 indicates the capacity of the lines A to D after the slot information conversion. When the line A is determined to be an idle line, and when the minimum capacity is set to 2, the capacity of the line A becomes 2 as in the first method. The remaining capacity 12 excluding the minimum capacity 2 of the pre-assigned capacity 14 of the line A is the pre-assigned capacity 6, 12, 18 assigned to the other B, C, and D lines, respectively.
As shown by 33, the capacity of the line A is increased by a minimum capacity of 2, the capacity of the line B is increased by 4, and the capacity of the line C is increased by 6 in proportion to. In the second method, when there is a line that is not being used, it is proportionally distributed to other lines, so that in the case where charging is performed according to the pre-assignment band, an increase band can be set according to the charging amount. It has the characteristic.

As described above, according to the ninth embodiment, the access control method and the transmission control method which can improve the transmission efficiency for information having a very long idle period, such as computer communication, by using any of the above methods. There is an effect that an access control device can be obtained.

Embodiment 10 FIG. FIG. 24 is a block diagram showing a main configuration of a master station and slave stations of an access control device to which the access control method according to the tenth embodiment of the present invention is applied. In FIG. 24, reference numeral 4b denotes a multiplexing unit (transmitting means on the master station side) for generating and multiplexing the time lot allocation information of the slave station to downlink information and distributing and transmitting the information to each slave station; The inflow amount receiving unit 35 for periodically receiving the inflow amount of information per unit time, which is constituted by a FIFO or the like which stores the information amount to be transmitted by a plurality of slave stations fairly together with the slave station numbers. The common queue (inflow amount storing means) 36 is an allocation information generating unit (slot allocation information generating means) for generating allocation information of time slots by the number of stored information in the order of the slave stations stored in the common queue 35. It is. 5 is a TDMA slot information receiving unit shown in the first embodiment and the fifth, sixth, seventh, eighth and ninth embodiments, 6a is a delay unit (delay means), 7 is a FIFO unit, 22
a is a multiplexing unit on the slave station side (slave station inflow amount transmitting means, station side transmitting means), and 23 is the inflow amount monitoring unit shown in the sixth and seventh embodiments.

Next, the operation will be described. FIG. 24B shows the configuration of each slave station.
Information to be transmitted to the master station, which is input to the FO unit 7, is monitored by the inflow amount monitoring unit 23 at regular intervals, and the monitored inflow amount is added to a part of the transfer information to the master station and transferred to the master station.

In the master station, the inflow amount receiving section 34 receives information such as the inflow amount from a plurality of slave stations, and stores the information such as the number of each slave station and the inflow amount in the common queue 35 in order. . The allocation information generation unit 36 generates time lot allocation information of the slave station in the order written in the common queue based on the information on the inflow amount, and the multiplexing unit (master station side transmission means) 4b downloads the time lot allocation information. It is multiplexed with information and distributed and transmitted to each slave station.

In each slave station, the pre-assigned TDMA slot information receiving section 5 receives the time slot allocation information, and delays the transmission timing by the delay section 6a until the time slot to be transmitted by each slave station arrives. FIF
The information stored in the O section 7 is read.

As described above, according to the tenth embodiment, when a large amount of data is stored in the FIFO section in a plurality of slave stations, the common queue 35 in the master station is
A lot of information is stored compared to the generation cycle of the allocation information, and in this state, the use efficiency of the transmission line becomes 100%, and the access efficiency at the time of congestion of the transmission line is improved. There is an effect that a control method and an access control device can be obtained.

Embodiment 11 FIG. In the tenth embodiment, there is an advantage that the efficiency is improved at the time of congestion. On the other hand, in a state where the use of the transmission line is small, the information to be newly transmitted to the master station is based on the inflow amount into the FIFO unit. , And transmission becomes possible after the allocation information is sent to each slave station, so that it takes time until the transmission and the use efficiency of the transmission path is reduced. In the eleventh embodiment, when the use of a transmission path is small and there is no information to be used for time slot allocation, time slots are evenly allocated to slave stations. To avoid a decrease in usage efficiency.

FIG. 25 is a block diagram showing a main configuration of a master station and a slave station of an access control apparatus to which the access control method according to the eleventh embodiment of the present invention is applied. In FIG. 25, the same or corresponding parts as those in FIG. 24 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 25, reference numeral 37 denotes an empty detection unit for detecting that no information is accumulated in the common queue 35, and reference numeral 38 denotes an equal allocation signal generation for generating an equal allocation signal for equally allocating time slots to a slave station which is powered on. And 39, the timing of the equal allocation signal output from the equal allocation signal generation unit 38, the equal allocation signal is distributed to the slave stations, and information is transmitted from the slave station,
A delay unit that delays by the time it is transferred to the master station, 4
0 is a selector (selecting means) for selecting either the allocation information generated by the allocation information generation unit 36 or the equal allocation signal generated by the equal allocation signal generation unit 38, and 41 is information effective in uplink data from the slave station. Is an effective cell detection unit that detects that the data is inserted, and 51 is an allocation information deletion unit. The configuration of the slave station is the same as that of FIG.

In the master station shown in FIG.
When the empty detection unit 37 detects that there is no allocation information to be generated from the contents of No. 5, the equal allocation signal generation unit 38 generates an allocation signal evenly for the slave stations that are powered on, and stores the information in the common queue 35. Even in the case where is not accumulated, information transmission in the down direction is performed. The information transferred from the slave station according to the allocation signal from the equal allocation signal generation unit 38 includes:
The equal allocation signal output from the equal allocation signal generator 38 is delayed by the delay unit 39 until the timing at which the information from the slave station is transferred. When the valid cell detecting unit 41 detects that the information transmitted according to the equal allocation signal of the equal allocation signal generating unit 38 is a valid cell, the allocation information deleting unit 51 has already written the information transmitted to the common queue 36. It has an allocation information deletion function for reducing the information amount of the slave station number to be transmitted by one.

Since this embodiment is configured as described above, it is not clear from which slave station the information to be transmitted in the upstream direction may be transmitted, that is, the information for generating the allocation information in the common queue 35. If the information does not exist,
By generating the allocation information evenly for the slave stations, it is possible to improve the use efficiency of the transmission path even when the information of each slave station does not accumulate much. Since the information transmitted from the slave station in accordance with the equal allocation signal is already notified to the master station and stored in the common queue in the sense of slot reservation, the content of the already allocated common queue is transmitted. By performing the rewriting that only the number of channels is reduced, it is possible to obtain an access control method and an access control device that can secure more uplink channels for other slave stations and can further effectively use a transmission path. effective.

Embodiment 12 FIG. Each block in each of the above embodiments may be configured by hardware or may be realized by software.

[0098]

As described above, according to the first aspect of the present invention, there is provided a slot information setting step for fixedly setting in advance slot information on a slot to be allocated to each slave station;
An idle line determining step of determining an idle line by communication performed between the slave station and the master station based on the slot information set in the slot information setting step; Assignment for assigning a slot assigned to a slave station determined to be an idle line to another slave station with respect to the slot information set in the slot information setting process based on idle line information of the line. Based on the slot assignment relationship setting process for setting the relationship and new slot information according to the assignment relationship set by the slot assignment relationship setting process, each slave station knows its own assigned slot and sends it to the master station. And transmitting the information to be transmitted using the self-assigned slot. Changed to the slot number of the line, the transfer-destination slave station increases the bandwidth due to the transferred line, increasing the transmission efficiency, and also improving the overall transmission efficiency between the slave station and the master station Has the effect of doing

According to the second aspect of the present invention, the idle information of the line transmitted from each slave station to the master station using the slot learned based on the slot information set in the slot information setting process is used. The idle line is determined in the idle line determination step, and based on the idle line information on the idle line determined in the idle line determination step, the slot information set in the slot information setting step is determined as the idle line. Setting of the transfer relationship when transferring the slot allocated to the slave station to another slave station is performed on the master station side by a slot transfer relationship setting process, and the transfer relationship set by the slot transfer relationship setting process is set. Each slave station knows its own assigned slot based on the slot information according to the above, and sends it to the master station using the assigned slot. Is transmitted in the transmission process, the slot of the idle line determined by the idle information transmitted from each of the slave stations to the master station is changed to the slot number of the transfer destination line, and the transfer destination The new slave station has the effect of increasing the transmission efficiency by increasing the bandwidth of the transferred line, and improving the overall transmission efficiency between the slave station and the master station.

According to the third aspect of the present invention, the idle information of the line transmitted from each slave station to the master station using the slot learned based on the slot information set in the slot information setting process is used. Determine the idle line in the idle line determination step, based on the idle line information about the idle line determined in the idle line determination step, based on the slot set in the slot information setting step broadcast from the master station For the information, the setting of the transfer relationship for transferring the slot assigned to the slave station determined to be the idle line to another slave station is performed in each slave station in the slot transfer relationship setting process, and in the slot transfer relationship setting process, Each slave station knows its own assigned slot based on slot information according to the set transfer relationship, and uses the own assigned slot to Since the information to be sent to the transmitting station is transmitted in the transmitting process, the setting of the transfer relation is performed in each slave station, so that the burden on the data processing of the master station is compared with the case where the setting of the transfer relation is performed in the master station. Has the effect of reducing.

According to the fourth aspect of the present invention, the idle information of the line transmitted from each slave station to the master station is transmitted using the slot learned based on the slot information set in the slot information setting process. An idle line detecting step including: an idle information detecting step of detecting; an idle line determining step of determining an idle line on the slave station side based on the idle information detected in the idle information detecting step; Based on the determination result, for the slot information set in the slot information setting process broadcast from the master station, when transferring the slot assigned to the slave station determined to be the idle line to another slave station. Is set in the slot assignment relationship setting process on the slave station side, and each slave station assigns itself according to the assignment relationship set in the slot assignment relationship setting process. Knowing the lot and transmitting the information to be sent to the master station using the self-assigned slot in the transmission process, the determination of the idle line and the setting of the transfer relationship are performed in each slave station, so the master station There is an effect that the burden on data processing of the master station is further reduced as compared with the case where the determination of the idle line and the setting of the transfer relationship are performed.

According to the fifth aspect of the present invention, a cell transmitted from a slave station to a master station using a slot according to the slot information set in the slot information setting step is included in the cell.
Since identification information indicating that no valid information is present is used as idle information for determining an idle line in the idle line determination process, the identification information is included in information transmitted from the slave station to the master station in units of cells. There is an effect that an idle line can be determined based on the identification information.

According to the sixth aspect of the present invention, a slot information setting step for fixedly setting first slot information for a slot to be allocated to each slave station in advance, and information for detecting an information amount of each slave station. An amount detection step, a remaining amount prediction step of predicting the remaining amount of information remaining in the slave station at the end of the next frame based on the information amount detected in the information amount detection step; A slot information generating step of generating second slot information based on the remaining amount of the information predicted in step 1; and a first slot information set in the slot information setting step or a second slot information generated in the slot information generating step. And selecting each of the slave stations based on the first slot information or the second slot information selected in the selection step. Transmitting the information to be sent to the master station using the self-allocated slot, so that the first slot information or the predicted information remaining based on the remaining amount of the information is generated. The use of the self-assigned slot learned from the second slot information by each slave station has the effect of improving transmission efficiency.

According to the seventh aspect of the present invention, a slave station residual information detecting step of detecting the remaining amount of information to be transmitted remaining in each slave station at the end of a frame, and a method of detecting information flowing into each slave station. An information amount detection step including an inflow amount detection step of detecting an inflow amount per frame, wherein the remaining amount detected in the slave station residual information detection step and the inflow amount detected in the inflow amount detection step Originally, the remaining amount prediction process predicts the remaining amount of information remaining in the slave station at the end of the next frame. Therefore, based on the first slot information or the remaining amount of the predicted information, There is an effect that the transmission efficiency can be improved by using the self-assigned slot learned from the generated second slot information by each slave station.

According to the eighth aspect of the present invention, the information amount detecting step includes a slave station residual information detecting step of detecting the remaining amount of information to be transmitted remaining in each slave station at the end of a frame. Based on the residual amount detected in the residual information detection process,
Since the remaining amount of information remaining in the slave station at the end of the next frame is predicted in the remaining amount prediction process, the first slot information or the second information generated based on the predicted remaining amount of the information is generated. There is an effect that the transmission efficiency can be improved by using the self-assigned slot learned from the slot information of No. 2 by each slave station.

According to the ninth aspect of the present invention, an inflow amount detecting step of detecting an inflow amount of information flowing into a slave station, and information on the inflow amount detected in the inflow amount detection step is transmitted to the slave station. Based on the inflow amount storing step of sequentially storing together with the identification information, and the inflow amount information stored in the inflow amount storing step, generating slot allocation information of slots to be allocated to the respective slave stations according to the order. Based on the allocation information generating step and the slot allocation information for each of the slave stations generated by the slot allocation information generating step, each of the slave stations knows the self-use slot allocated to itself, and And a transmission step of transmitting information to be transmitted, thereby improving the use efficiency when the transmission path is congested.

According to the tenth aspect of the present invention, based on the slot allocation information for each of the slave stations generated in the slot allocation information generating step, the transmission timing is determined until a slot carrying information to be transmitted arrives. Since a delay process is provided for delaying, each slave station can transmit information to be transmitted to the master station after waiting by the delay process to the master station. is there.

According to the eleventh aspect of the present invention, there is provided slot information setting means for fixedly setting in advance slot information about slots to be allocated to each slave station, and First broadcasting means for broadcasting to the slave station; and a communication between the slave station and the master station based on the slot information broadcast to each of the slave stations by the first broadcasting means. Idle line determining means for determining an idle line based on the communication to be performed; and, based on idle line information about the idle line determined by the idle line determining means, the slot information set by the slot information setting means. Slot assignment relation setting means for setting an assignment relation for assigning a slot assigned to a slave station determined to be assigned to another slave station; Based on the new slot information according to the transfer relationship set by the transfer relationship setting means, each slave station knows its own assigned slot, and sends information to be sent to the master station using the own assigned slot. Transmission means for transmitting, the slot of the idle line determined by the idle line determination means is changed to the slot number of the line of the transfer destination, and transferred to the slave station as the transfer destination This has the effect of increasing the transmission efficiency due to the increase in the bandwidth of the line, and also improving the overall transmission efficiency between the slave station and the master station.

According to the twelfth aspect of the present invention, each slave station uses the slot learned based on the slot information set by the slot information setting means to transmit the idle information based on the idle information of the line transmitted to the master station. The line is determined by the idle line determination unit, and based on the idle line information on the idle line determined by the idle line determination unit, the slot information set by the slot information setting unit is determined to be the idle line. Setting of a transfer relationship for transferring a slot assigned to a slave station to another slave station is performed by slot transfer relationship setting means, and slot information according to the transfer relationship set by the slot transfer relationship setting means is set to The second broadcast means broadcasts to the slave station, and the slot information broadcast to each slave station by the second broadcast means is And each of the slave stations knows its own assigned slot, and a transmitting means for transmitting information to be sent to the master station using the own assigned slot. The slot of the idle line determined based on the idle information sent from the slave station to the master station is changed to the slot number of the transfer destination line, and the transfer destination line increases the bandwidth of the transfer destination line in the transfer destination slave station. This has the effect of increasing the transmission efficiency and improving the overall transmission efficiency between the slave station and the master station.

According to the thirteenth aspect of the present invention, each slave station uses the slot learned based on the slot information set by the slot information setting means to transmit the idle information based on the idle information of the line transmitted to the master station. Determine the line by idle line determination means, based on the idle line information about the idle line determined by the idle line determination means,
For the slot information broadcast from the master station by the first broadcast means set by the slot information setting means, transfer the slot allocated to the slave station determined to be the idle line to another slave station. Setting of the transfer relationship to be performed at each slave station by the slot transfer relationship setting means, and each slave station knows its own assigned slot based on the slot information according to the transfer relationship set by the slot transfer relationship setting means, Since the information to be sent to the master station is transmitted by the transmission means using the self-assigned slot, the assignment relation is set by the slot assignment relation setting means in each slave station. This has the effect of reducing the burden on the data processing of the master station as compared with the case where the transfer relationship is set.

According to the fourteenth aspect of the present invention, each of the slave stations detects idle information of a line transmitted to the master station by using a slot known based on the slot information set by the slot information setting means. Idle line determination means having idle information detection means for performing idle line determination on the slave station side based on the idle information detected by the idle information detection means, and determination by the idle line determination means. On the basis of the result, the slot information set by the slot information setting means broadcast from the master station by the first broadcasting means is used to change the slot assigned to the slave station determined to be the idle line to another. The setting of the transfer relationship when transferring to the slave station is performed by the slot transfer relationship setting means,
According to the transfer relationship set by the slot transfer relationship setting unit, each slave station knows its own assigned slot, and the transmitting unit transmits information to be sent to the master station using the self assigned slot. Therefore, the determination of the idle line is performed by the determination means of each slave station, and the transfer relation is set by the slot transfer relation setting means, so that the determination of the idle line and the setting of the transfer relation are performed at the master station. This has the effect of further reducing the data processing burden on the master station.

According to the fifteenth aspect of the present invention, the slot information setting means for fixedly setting the first slot information for the slot to be allocated to each slave station in advance, and the second information set by the slot information setting means. Broadcast information for broadcasting the slot information and the like to each of the slave stations, information amount detection means for detecting the information amount of each slave station, and information amount detected by the information amount detection means. The remaining stations predict the remaining amount of information remaining in the slave station at the end of the next frame, and each slave station uses a slot based on the first slot information set by the slot information setting means. Slot information generating means for generating second slot information based on the remaining amount of the information predicted by the remaining amount predicting means sent to the master station; and a first information set by the slot information setting means. Selecting means for selecting either the lot information or the second slot information generated by the slot information generating means; and the second means selected by the selecting means and broadcasted to each slave station by the broadcasting means. Transmitting means for each of the slave stations to know its own assigned slot based on the first slot information or the second slot information, and to transmit information to be sent to the master station using the own assigned slot. As a result, the second slot information generated based on the remaining amount of the first slot information or the predicted information is used.
The use of the self-assigned slot known by the slot information of each slave station has the effect of improving the transmission efficiency.

According to the sixteenth aspect of the present invention, there is provided a slave station residual information detecting means for detecting the remaining amount of information to be transmitted remaining in each slave station at the end of a frame, and for detecting information flowing into each slave station. An information amount detection unit including an inflow amount detection unit that detects an inflow amount per frame; and the remaining amount detected by the slave station residual information detection unit and the inflow amount detected by the inflow amount detection unit. And the remaining amount predicting means for predicting the remaining amount of information remaining in the slave station at the end of the next frame, so that the remaining amount of the first slot information or the predicted information The use of the self-assigned slot learned from the second slot information generated by each slave station has the effect of improving transmission efficiency.

According to the seventeenth aspect of the present invention, there is provided an information amount detecting means comprising a slave station residual information detecting means for detecting the remaining amount of information to be transmitted remaining in each slave station at the end of a frame; Since it is configured to include the remaining amount prediction means for predicting the remaining amount of information remaining in the slave station at the end of the next frame based on the remaining amount detected by the station remaining information detection means, the first There is an effect that the transmission efficiency can be improved by using the self-assigned slot learned by the second slot information generated based on the slot information of the above or the estimated remaining amount of information by each slave station.

According to the eighteenth aspect of the present invention, an inflow amount detecting means for detecting an inflow amount of information flowing into the slave station, and information on the inflow amount detected by the inflow amount detection means is transmitted to each of the slave stations. A slave station-side inflow amount transmitting means for transmitting to the master station by multiplexing in accordance with the slot allocation information, and identifying the slave station with the information on the inflow amount sent to the master station by the slave station-side inflow amount transmitting means. An inflow amount storing means for sequentially storing the information with the information; and a slot for generating the slot allocation information of the slots to be allocated to the respective slave stations in the order based on the inflow amount information stored by the inflow amount storing means. Allocation information generating means, master station side transmitting means for multiplexing the slot allocation information generated by the slot allocation information generating means from the master station to the respective slave stations, and transmitting the multiplexed slot allocation information to the slave stations; The slave station that each of the slave stations knows its own slot allocated to itself and transmits information to be transmitted by the own slot, based on the slot allocation information sent to each slave station by the means. Since the transmission means is provided, the use efficiency at the time of congestion of the transmission path is improved.

According to the nineteenth aspect, based on the slot allocation information for each slave station generated by the slot allocation information generating means, each of the slave stations operates until a slot for carrying information to be transmitted arrives. Since the slave station is configured to include a delay unit for delaying the transmission timing, each of the slave stations can transmit information to be sent to the master station after waiting by the delay process to the master station. There is an effect of improving.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating main parts of a master station and a slave station of an access control device to which an access control method according to a first embodiment of the present invention is applied.

FIG. 2 is a flowchart illustrating an algorithm for creating a conversion table indicating a transfer relationship of an access control device to which the access control method according to the first embodiment of the present invention is applied;

FIG. 3 is an explanatory diagram illustrating an example of a chain configuration and a conversion table of an access control device to which the access control method according to the first embodiment of the present invention is applied;

FIG. 4 is a block diagram showing main parts of a master station and a slave station of an access control device to which an access control method according to Embodiment 2 of the present invention is applied.

FIG. 5 is a block diagram showing a main part of a master station and slave stations of an access control device to which an access control method according to a third embodiment of the present invention is applied.

FIG. 6 is a block diagram showing a main part of a master station of an access control device to which an access control method according to a fourth embodiment of the present invention is applied.

FIG. 7 is a block diagram illustrating components for realizing a function of detecting a highest load line by a highest load line detection unit of an access control device to which an access control method according to a fourth embodiment of the present invention is applied;

FIG. 8 is a block diagram showing each configuration for realizing a function of detecting a highest load line by a highest load line detection unit of the access control device to which the access control method according to the fourth embodiment of the present invention is applied;

FIG. 9 is a block diagram illustrating each configuration for realizing a function of detecting a highest load line by a highest load line detection unit of the access control device to which the access control method according to the fourth embodiment of the present invention is applied;

FIG. 10 is a block diagram showing a main part of a master station and slave stations of an access control device to which an access control method according to a fifth embodiment of the present invention is applied.

FIG. 11 is a block diagram showing main parts of a master station and a slave station of an access control device to which an access control method according to a sixth embodiment of the present invention is applied.

FIG. 12 is a block diagram showing main parts of a master station and slave stations of an access control device to which an access control method according to a seventh embodiment of the present invention is applied.

FIG. 13 is a flowchart showing an algorithm for generating TDMA slot information from a predicted remaining amount value in an access control device to which an access control method according to a seventh embodiment of the present invention is applied.

FIG. 14 is an explanatory diagram showing a method of increasing and decreasing a band in an access control device to which an access control method according to a seventh embodiment of the present invention is applied.

FIG. 15 is a flowchart showing an algorithm when the bandwidth is increased in the access control device to which the access control method according to the seventh embodiment of the present invention is applied.

FIG. 16 is a flowchart showing an algorithm when the bandwidth is reduced in the access control device to which the access control method according to the seventh embodiment of the present invention is applied.

FIG. 17 is a flowchart showing an algorithm for increasing a band in an access control device to which an access control method according to a seventh embodiment of the present invention is applied.

FIG. 18 is a flowchart showing an algorithm when the bandwidth is reduced in the access control device to which the access control method according to the seventh embodiment of the present invention is applied.

FIG. 19 is a sequence diagram showing a notification timing of TDMA slot information in an access control device to which an access control method according to a seventh embodiment of the present invention is applied.

FIG. 20 is a block diagram showing main parts of a master station and slave stations of an access control device to which an access control method according to an eighth embodiment of the present invention is applied.

FIG. 21 is a block diagram showing a main part of a master station of an access control device to which an access control method according to a ninth embodiment of the present invention is applied.

FIG. 22 is an explanatory diagram showing a first method of distributing preassigned capacity of an idle line in an access control device to which the access control method according to the ninth embodiment of the present invention is applied.

FIG. 23 is an explanatory diagram showing a second method of distributing the pre-assigned capacity of the idle line in the access control device to which the access control method according to the ninth embodiment of the present invention is applied.

FIG. 24 is a block diagram showing main parts of a master station and slave stations of an access control device to which an access control method according to a tenth embodiment of the present invention is applied.

FIG. 25 is a block diagram showing main parts of a master station and slave stations of an access control device to which an access control method according to an eleventh embodiment of the present invention is applied.

FIG. 26 is a configuration diagram showing a subscriber line to which a conventional access control method and device are applied.

[Explanation of symbols]

1 idle line determination unit (idle line determination means), 1
a idle line determination unit (determination unit), 2 pre-assigned TDMA slot information generation unit (slot information setting unit), 3, 3a, 30 TDMA slot information conversion unit (slot transfer relationship setting unit), 4 multiplexing unit (first 4a multiplexing section (broadcasting means), 4b multiplexing section (master station side transmitting means), 6, 6a
Delay unit (delay means), 7 FIFO (transmission means), 20
Remaining amount extraction comparing section (slave station residual information detecting means), 21 frame end remaining amount monitoring section (information amount detecting means, slave station residual information detecting means), 22 multiplexing section (transmitting means), 22a
Multiplexing unit (slave station inflow amount transmitting means, slave station side transmitting means), 23 inflow amount monitoring unit (information amount detecting means, inflow amount detecting means), 24, 27 prediction operation unit (remaining amount prediction means), 25 TDMA slot information generation unit (slot information generation unit), 26 selection unit (selection unit), 35 common queue (inflow amount storage unit), 36 allocation information generation unit (slot allocation information generation unit), 40 selector (selection unit).

Claims (19)

[Claims] 1. An access control method for connecting a master station and a plurality of slave stations via a transmission line and performing time-division digital communication from the slave station to the master station using a slot allocated to each slave station. A slot information setting step for fixedly setting slot information about slots to be allocated to stations in advance; and communication performed between the slave station and the master station based on the slot information set in the slot information setting step. An idle line determining step of determining an idle line by: determining the idle line with respect to the slot information set in the slot information setting step based on idle line information on the idle line determined by the idle line determining step Transfer relationship setting process for setting a transfer relationship for transferring a slot allocated to a given slave station to another slave station Based on the new slot information according to the transfer relationship set in the slot transfer relationship setting step, each of the slave stations knows its own assigned slot and uses the own assigned slot for information to be sent to the master station. And a transmitting step of transmitting the data. 2. The idle line determination step, wherein the idle line is sent from each slave station to the master station using the slot learned based on the slot information set in the slot information setting step. In the slot assignment relationship setting step, the slot information set in the slot information setting step is determined as the idle line based on the idle line information on the idle line determined in the idle line determining step. The master station sets the transfer relationship when transferring the slot allocated to the slave station to another slave station, and in the transmission process, follows the transfer relationship set by the slot transfer relationship setting process. Each slave station knows its own assigned slot based on the slot information obtained, and information to be sent to the master station using the own assigned slot. Access control method according to claim 1, wherein the transmitting. 3. In the idle line determination step, the idle line is transmitted based on the idle information of the line transmitted from each slave station to the master station using a slot learned based on the slot information set in the slot information setting step. In the slot assignment relationship setting step, based on the idle line information on the idle line determined in the idle line determination step, the slot broadcast from the master station set in the slot information setting step With respect to the information, the setting of the transfer relationship for transferring the slot assigned to the slave station determined to be the idle line to another slave station is performed in each slave station, and in the transmission process, the setting is performed in the slot transfer relationship setting process. Each slave station should know its own assigned slot based on the slot information according to the transfer relationship and send it to the master station using the assigned slot. Access control method according to claim 1, wherein the transmitting the information. 4. An idle information detecting step of detecting idle information of a line transmitted from each slave station to a master station using a slot known based on slot information set in the slot information setting step; An idle line determination step having a determination step of determining an idle line on the slave station side based on the idle information detected in the idle information detection step; and a slot assignment relationship setting step, wherein the idle line determination step determines the idle line. Based on the result, regarding the slot information broadcasted from the master station set in the slot information setting process, when transferring the slot assigned to the slave station determined to be the idle line to another slave station. In the transmission process, each slave station sets its own assigned slot in accordance with the transfer relationship set in the slot transfer relationship setting process. Ri, access control method according to claim 1, wherein the using the self-assigned slot for transmitting information to be sent to the master station. 5. The idle information for determining an idle line in the idle line determination step is included in a cell transmitted from the slave station to the master station using a slot based on the slot information set in the slot information setting step. The access control method according to any one of claims 2 to 4, wherein the identification information is identification information indicating that valid information does not exist. 6. An access control method in which a master station and a plurality of slave stations are connected by a transmission line, and time-divisional digital communication is performed from the slave station to the master station using a slot allocated to each slave station. A slot information setting step of fixedly setting first slot information about a slot to be allocated to a station in advance; an information amount detecting step of detecting an information amount of each of the slave stations; and the information detected in the information amount detecting step. A remaining amount prediction step of predicting the remaining amount of information remaining in the slave station at the end of the next frame based on the remaining amount;
A slot information generating step of generating slot information of the following; and a selecting step of selecting either the first slot information set in the slot information setting step or the second slot information generated in the slot information generating step Based on the first slot information or the second slot information selected in the selection step, each of the slave stations knows the self-assigned slot and uses the self-assigned slot for information to be sent to the master station. And a transmitting step of transmitting the data. 7. An information amount detecting step includes: detecting a remaining amount of information to be transmitted remaining in each slave station at the end of a frame; and detecting a remaining amount of information per frame flowing into each slave station. An inflow amount detection step of detecting an inflow amount of the remaining station.The remaining amount prediction step is based on the remaining amount detected in the slave station residual information detection step and the inflow amount detected in the inflow amount detection step. 7. The access control method according to claim 6, wherein the remaining amount of information remaining in the slave station at the end of the next frame is predicted. 8. The information amount detecting step includes a slave station residual information detecting step of detecting, at the end of a frame, a remaining amount of information to be transmitted remaining in each slave station. 7. The access control method according to claim 6, wherein the remaining amount of information remaining in the slave station at the end of the next frame is predicted based on the remaining amount detected in the information detecting step. 9. An access control method in which a master station and a plurality of slave stations are connected by a transmission line, and time-division digital communication is performed from the slave station to the master station using a slot allocated to each slave station. An inflow amount detecting step of detecting an inflow amount of the inflowing information; an inflow amount storing step of sequentially storing information on the inflow amount detected in the inflow amount detection step together with identification information of the slave station; A slot allocation information generating step of generating slot allocation information of slots to be allocated to the respective slave stations in the order described above, based on the information on the inflow amount stored in the process, and a slot allocation information generating step. Based on the slot allocation information for each slave station, each slave station knows its own slot assigned to itself and transmits information to be transmitted by the own slot. Access control method characterized by comprising a transmission process that. 10. A delay step for delaying transmission timing until a slot carrying information to be transmitted arrives based on the slot allocation information for each of the slave stations generated in the slot allocation information generating step. The access control method according to claim 9, wherein: 11. An access control apparatus for connecting a master station and a plurality of slave stations via a transmission line such as an optical fiber and performing time-division digital communication from the slave station to the master station using slots allocated to each slave station. Slot information setting means for fixedly setting in advance slot information on slots to be allocated to the respective slave stations; and a first broadcast for broadcasting the slot information set by the slot information setting means to the respective slave stations. Means for determining an idle line by communication performed between the slave station and the master station based on the slot information broadcast to the slave stations by the first broadcast means. Determining means for determining the slot information set by the slot information setting means based on idle line information on the idle line determined by the idle line determining means; Slot assignment relation setting means for setting a transfer relation for transferring a slot assigned to a slave station determined to be an idle line to another slave station, and a transfer relation set by the slot transfer relation setting means. Transmitting means for each of the slave stations to know the self-assigned slot based on the new slot information and to transmit information to be sent to the master station using the self-assigned slot. Control device. 12. The idle line determining means uses the slot learned based on the slot information set by the slot information setting means to determine the idle line by the idle information of the line that each slave station sends to the master station. Determining, based on the idle line information about the idle line determined by the idle line determining unit, the slot transfer relationship setting unit determines that the slot information set by the slot information setting unit is the idle line. A transfer relationship for transferring a slot assigned to a slave station to another slave station is set, and slot information according to the transfer relationship set by the slot transfer relationship setting means is broadcast to the slave stations. A second broadcasting unit, wherein the transmitting unit is configured to transmit the first broadcast information based on the slot information broadcast to each of the slave stations by the second broadcasting unit. 2. The mobile station according to claim 1, wherein each slave station knows its own assigned slot and transmits information to be sent to said master station using said own assigned slot.
2. The access control device according to 1. 13. The idle line determination means uses the slot learned based on the slot information set by the slot information setting means to determine the idle line based on the idle information of the line transmitted from each slave station to the master station. Determining, based on the idle line information about the idle line determined by the idle line determining unit, the slot transfer relationship setting unit from the master station by a first broadcast unit set by the slot information setting unit. With respect to the broadcasted slot information, each slave station performs setting of a transfer relationship for transferring a slot assigned to the slave station determined to be the idle line to another slave station, and the transmitting means includes: Each slave station knows its own assigned slot based on the slot information according to the transfer relationship set by the relationship setting means, and uses the own assigned slot to Access control device according to claim 11, wherein transmitting the information to be sent to the station. 14. An idle information detecting means for detecting idle information of a line transmitted from each slave station to a master station using a slot known based on slot information set by the slot information setting means; An idle line determination unit having a determination unit for determining an idle line on the slave station side based on the idle information detected by the idle information detection unit; and a slot assignment relation setting unit, the determination result by the idle line determination unit. Based on the slot information set by the slot information setting means and broadcasted from the master station by the first broadcast means, the slot assigned to the slave station determined to be the idle line is assigned to another child station. The slave station side sets the transfer relationship when transferring to a station, and the transmitting means sets each of the slave stations in accordance with the transfer relationship set by the slot transfer relationship setting means. Know those slots, the access control apparatus according to claim 11, wherein transmitting the information to be sent to the master station by using the self-assigned slots. 15. An access control apparatus for connecting a master station and a plurality of slave stations via a transmission line such as an optical fiber and performing time-division digital communication from the slave station to the master station using a slot allocated to each slave station. Slot information setting means for fixedly setting first slot information about slots to be allocated to each slave station in advance; and transmitting the first slot information and the like set by the slot information setting means to each slave station. Broadcasting means for reporting, information amount detecting means for detecting the information amount of each slave station, and remaining in the slave station at the end of the next frame based on the information amount detected by the information amount detecting means. A remaining amount predicting unit for predicting a remaining amount of information; and the remaining amount that each of the slave stations sends to the master station using a slot based on the first slot information set by the slot information setting unit. Slot information generating means for generating second slot information based on the remaining amount of information predicted by the predicting means; first slot information set by the slot information setting means or generated by the slot information generating means Selecting means for selecting any of the obtained second slot information; and the first slot information or the second slot selected by the selecting means and broadcasted to each of the slave stations by the broadcasting means. An access control device, comprising: a transmitting unit for each of the slave stations to know its own assigned slot based on information and to transmit information to be sent to the master station using the own assigned slot. 16. An information amount detecting means for detecting, at the end of a frame, a remaining amount of information to be transmitted remaining in each slave station, and a residual information detecting means for detecting a residual amount of information flowing into each slave station. Inflow amount detection means for detecting the inflow amount of the remaining amount, the remaining amount prediction means, based on the remaining amount detected by the slave station residual information detection means and the inflow amount detected by the inflow amount detection means 16. The method according to claim 15, further comprising: predicting a remaining amount of information remaining in the slave station at the end of the next frame.
An access control device as described. 17. An information amount detecting means includes a slave station residual information detecting means for detecting a remaining amount of information to be transmitted remaining in each slave station at the end of a frame. 16. The access control device according to claim 15, wherein the remaining amount of information remaining in the slave station at the end of the next frame is predicted based on the remaining amount detected by the information detecting means. 18. An access control device for connecting a master station and a plurality of slave stations via a transmission line such as an optical fiber, and performing time-division digital communication from the slave station to the master station using a slot allocated to each slave station, An inflow amount detecting means for detecting an inflow amount of information flowing into the slave station; and information on the inflow amount detected by the inflow amount detection means, multiplexed from each of the slave stations to the master station in accordance with slot allocation information and transmitted. Slave station side inflow amount transmitting means; inflow amount storage means for sequentially storing information on the inflow amount sent to the master station by the slave station inflow amount transmitting means together with the identification information of the slave station; Slot allocation information generating means for generating the slot allocation information of the slots to be allocated to each slave station according to the order based on the information on the inflow amount stored by the amount storing means; Master-station-side transmitting means for multiplexing the slot-assignment information generated by the slot-assignment-information generating means from the master station to each of the slave stations, and transmitting the multiplexed information to the slave stations by the master-station-side transmitting means; Each of the slave stations knows its own slot assigned to itself based on slot allocation information, and has slave station transmitting means for transmitting information to be transmitted by the own slot. Access control device. 19. Based on the slot assignment information for each slave station generated by the slot assignment information generating means, each slave station includes a delay means for delaying transmission timing until a slot carrying information to be transmitted arrives. The access control device according to claim 18, further comprising: