JP2003060644A - Band control circuit, terminal station device and band control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a memory circuit scale even if the data size length (MTU- Maximum Transmission Unit) of data to be transmitted successively is a large value in a band control circuit. SOLUTION: A data length measuring circuit 11 measures a data amount to be temporarily stored in an operational memory 12. A data size counter 15 counts up the data length measured in the circuit 11. A comparator 16 compares a count value SIZE from the counter 15 with a preset burst value, and decides whether or not to start/stop reading of a reading circuit 14 and whether or not to output a band use request on the basis of a result of comparison.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system in which a plurality of terminal stations are connected to the same base station, and each terminal station transmits upstream data via a shared band of each upstream frame of a plurality of consecutive burst frames. Transmit to base station (continuous transmission)
The present invention relates to a band control circuit, a terminal station device, and a band control method.

[0002]

2. Description of the Related Art Generally, in a system in which a plurality of terminal stations are connected to the same base station, an upstream signal from each terminal station is time division multiplexed on an upstream frame of a burst frame and transmitted to the base station. Further, when the terminal station accumulates the transmission data that exceeds the shared bandwidth of the upstream frames, the terminal station calculates the size of the accumulated transmission data and continuously makes an upstream transmission permission request to the base station for each upstream frame. As a result, the base station determines the allocated band for the terminal station in consideration of the evenly allocated band, the minimum allocated band, etc., and continuously notifies this in each downlink frame, and each terminal station receives the uplink data by this allocation permission. Are continuously transmitted in the shared band of each upstream frame.

FIG. 21 shows the configuration of a conventional upstream band control circuit. Upstream data input from a host such as a personal computer via the input terminal 1 is stored in the upstream data storage memory 10
The upstream data stored in the upstream data storage memory 10 is read by the read circuit 14 based on the result comparison of the comparator 16 as described later. The data length of the upstream data read from the upstream data storage memory 10 is measured by the data length measuring circuit 11 and temporarily stored in the arithmetic memory 12.

The data size counter 15 adds up the data lengths measured by the data length measuring circuit 11, and the comparator 1
6 is a count value from the data size counter 15 and a size (MTU: Maxi) that the terminal station can continuously transmit at one time.
mum Transmission Unit, maximum transmission unit). The request circuit 17 issues an uplink transmission request to the base station via the output terminal 2 according to an instruction from the comparator 16. The upstream data temporarily stored in the arithmetic memory 12 is read by the read circuit 13 based on the allocation permission notification signal input from the base station via the input terminal 3 and transmitted to the base station via the output terminal 4. .

Referring to FIG. 22, base station 101 and terminal station 1
The basic communication sequence of 00 will be described. Terminal station (#
n) 100 transmits an upstream band use request to the base station 101 when the upstream data is accumulated. At this time, the other terminal station (# n + 1) also makes an upstream band use request. FIG. 21 shows the case where the base station 101
Is the downstream frame of the burst frame and the terminal station (#n) 1
00, and the terminal station (#n) 100 transmits uplink data in uplink frames according to the allocation.

Next, the operation of the above conventional example will be described with reference to FIGS. 21 and 23. The upstream data is stored in the upstream data storage memory 10 and sequentially read by the read circuit 14. Here, the data length measurement circuit 11 measures each data length, notifies the data length to the data size counter, and writes the data length in the arithmetic memory 12. The data size counter 15 adds the respective data lengths, and the resulting value SI
ZE is output to the comparator 16 (step S1). The above-mentioned transmittable size MTU is given to the comparator 16 and compared with the added value SIZE (step S2), and MTU <SI.
When it becomes ZE, the previous addition value is notified to the request circuit 17 (step S3). At this time, the reading circuit 14 is instructed to stop reading from the upstream data storage memory 10.

The request circuit 17 outputs an upstream band use request to the base station 101 based on the value notified by the comparator 16 (step S4). The read circuit 13 reads the upstream data from the arithmetic memory 12 by the upstream band permission notification from the base station, and transmits it to the base station 101 (step S5). At the same time, the data size counter 15 is cleared and new addition is performed. As a result, the comparator 16
Restarts the data reading by the reading circuit 14.

[0008]

However, in the above-mentioned conventional upstream band control circuit, the method of notifying the base station 100 of the upstream band use request based on the upstream data size length (= MTU) that can be continuously transmitted. Therefore, the arithmetic memory 12 for temporarily storing the upstream data needs to be prepared to have the same size as the MTU, which causes a problem that the circuit scale becomes large.

The present invention solves the above-mentioned conventional problems and is excellent in that it is possible to reduce the memory circuit scale for accumulating upstream data even if the data size length (MTU) that can be transmitted continuously is large. An object is to provide a band control circuit, a terminal station device, and a band control method.

[0010]

In order to achieve the above object, a band control circuit of the present invention is a band for each terminal station to transmit upstream data to a base station via a band of a predetermined capacity in an upstream frame. In the control circuit, a storage unit that stores the upstream data, and a transmission permission request including a bandwidth request of the predetermined capacity to the base station when the amount of the upstream data stored in the storage unit exceeds the predetermined capacity. Then, the uplink data is transmitted to the band allocated by the base station, and when the amount of the uplink data accumulated in the accumulating means again in the next frame becomes equal to or more than the predetermined capacity, the transmission permission request is issued for each frame. A means for continuously repeating is provided (Claim 1). With the above configuration, when the amount of accumulated upstream data exceeds the bandwidth of the predetermined capacity in the upstream frame, the transmission permission is requested to the base station. Therefore, the memory circuit scale for storing the upstream data is set to the above predetermined capacity. Can be made smaller.

In order to achieve the above object, the band control circuit of the present invention is a band control circuit for each terminal station to transmit uplink data to a base station via a band of a predetermined capacity in an uplink frame, Storage means for storing the upstream data, and requesting a transmission permission including a bandwidth request for the storage capacity from the base station when it is detected that the upstream data has been stored in the storage means, and assigned by the base station And transmitting the upstream data in the allocated band, and repeating the transmission permission request for each frame when it is detected again in the next frame that the upstream data is stored in the storage means. It is configured (claim 2). With the above configuration, when the base station requests transmission permission when it is detected that the uplink data has been stored, it is possible to reduce the memory circuit scale for storing the uplink data.

Further, in order to achieve the above object, the band control circuit of the present invention is a band control circuit for each terminal station to transmit uplink data to a base station via a band of a predetermined capacity in an uplink frame, A storage unit that stores the upstream data, and requests the base station for a transmission permission including a bandwidth request for the storage capacity when the amount of upstream data stored in the storage unit exceeds a transmission initial value of a predetermined amount. When the upstream data is transmitted in the band allocated by the base station and the amount of upstream data accumulated in the accumulating unit again in the next frame exceeds the transmission initial value of the predetermined amount, the transmission permission request is issued for each frame. And a means for repeating the above continuously (claim 3). With the above configuration, when the amount of accumulated upstream data exceeds the predetermined transmission initial value, the base station requests transmission permission to the above transmission initial value, so the memory circuit scale for storing the upstream data can be reduced. can do.

Further, the band control circuit of the present invention is configured such that the capacity of the storage means is at least twice the predetermined capacity (claim 4). With the above configuration, when the base station does not allocate the band, the transmission permission can be requested next time.

Further, the band control circuit of the present invention accumulates the transmission data amount to the base station at the time of the continuous transmission permission request, and when the accumulated data amount becomes the maximum transfer unit, the continuous transmission permission is given. The request is canceled or interrupted (Claim 5). With the above configuration, even if the scale of the memory circuit for storing the upstream data is reduced, the maximum transfer unit can be continuously transmitted.

Further, the bandwidth control circuit of the present invention counts the number of allocations by the base station at the time of the continuous transmission permission request, and when the count value becomes the maximum transfer unit divided by the predetermined capacity. The continuous transmission permission request is stopped or interrupted (claim 6). With the above configuration, even if the scale of the memory circuit for storing the upstream data is reduced, the maximum transfer unit can be continuously transmitted.

Further, the bandwidth control circuit of the present invention calculates a remainder obtained by subtracting the bandwidth requested to the base station from the predetermined capacity in the previous frame, and calculates the amount of upstream data stored in the storage means in the next frame. When the capacity obtained by subtracting the remainder from is equal to or larger than the predetermined capacity, a transmission permission request is made to the base station (claim 7).
With the above configuration, when the amount of data transmitted in the previous frame is smaller than the predetermined capacity, the difference can be transmitted in the next frame.

Further, the bandwidth control circuit of the present invention calculates the remainder by subtracting the previous cumulative data amount from the maximum transfer unit by accumulating the transmission data amount to the base station at the time of the previous continuous transmission permission request. Then, when the capacity obtained by subtracting the remainder from the next transmission data amount becomes the maximum transfer unit, the continuous transmission permission request is stopped or interrupted (claim 8). With the above configuration, when the amount of data continuously transmitted last time is smaller than the maximum transfer unit, the difference can be transmitted next time.

Further, the band control circuit of the present invention is configured to convert a frame from the terminal into another frame and store it in the storage means (claim 9). With the above configuration, since the frame is converted and transmitted, the memory circuit scale for accumulating the upstream data can be further reduced.

Further, the band control circuit of the present invention is configured to stop or suspend the storage in the storage means upon the notification of the end of the continuous transmission permission from the base station (claim 10).
With the above configuration, it is possible to reduce the size of the uplink reception buffer on the base station side.

Further, the band control circuit of the present invention resets the counter for accumulating the amount of upstream data continuously transmitted for each frame and the counter when the cumulative result of the counter is the maximum transfer unit. A structure having means is provided (Claim 11). With the above configuration, it is possible to continuously transmit up to the maximum transfer unit with a simple circuit configuration.

Further, the bandwidth control circuit of the present invention has a structure in which the frame to be preferentially transmitted is stored in the storage means and transmitted in preference to the frame to be normally transmitted (claim 1).
2). With the above configuration, in a configuration in which the memory circuit scale for accumulating upstream data is small, even if a frame to be preferentially transmitted occurs, it can be immediately and preferentially transmitted over a frame to be normally transmitted.

Further, the bandwidth control circuit of the present invention is configured to suspend or suspend the continuous transmission permission request when the cumulative total of the preferentially transmitted frame and the normally transmitted frame becomes the maximum transfer unit ( Claim 13). With the above configuration, in a configuration in which the memory circuit scale for accumulating upstream data is small, even if a frame to be preferentially transmitted occurs, it is possible to immediately and preferentially transmit the frame to be normally transmitted, and preferentially transmit. The maximum number of transfer units can be continuously transmitted by combining the frames to be transmitted and the frames to be normally transmitted.

Further, the terminal station device of the present invention is configured to have the band control circuit according to any one of claims 1 to 13 (claim 14). With the above configuration, it is possible to realize a terminal station device that has a small memory circuit scale for storing upstream data.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a first embodiment of a band control circuit according to the present invention, FIG. 2 is a flow chart for explaining continuous transmission processing of the band control circuit of FIG. 1, and FIG. 3 is a block diagram of the band control circuit of FIG. It is explanatory drawing which shows an example of a continuous transmission process.

In FIG. 1, the upstream data input through the input terminal 1 is stored in the upstream data storage memory 10, and the upstream data stored in the upstream data storage memory 10 is instructed by the comparator 16 as described later. Is read by the read circuit 14 based on Upstream data storage memory 1
The data length of the upstream data read from 0 is measured by the data length measuring circuit 11, and then the arithmetic memory 12
Is temporarily stored in. The arithmetic memory 12 has a shared band of one upstream frame (hereinafter, referred to as “burst value” here).
Has the same capacity as. The upstream data temporarily stored in the arithmetic memory 12 is read by the read circuit 13 based on the allocation permission notification signal input from the base station 101 via the input terminal 3 and transmitted to the base station 101 via the output terminal 4. To be done.

The data size counter 15 adds the data lengths measured by the data length measuring circuit 11 and outputs the addition result SIZE to the comparator 16. The comparator 16 compares the count value SIZE from the data size counter 15 with the set burst value, and based on the comparison result, determines whether to start / stop the reading of the reading circuit 14 and output the upstream band use request. The request circuit 17 issues an upstream band use request to the base station 101 via the output terminal 2 according to an instruction from the comparator 16. Further, the allocation comparator 18 compares a preset value = MTU / burst value with the allocation count from the allocation counter 19 which counts the allocation count from the base station 101, and based on the comparison result, the data size counter 15 Continuous transmission is interrupted by clearing the comparator 16.

The operation of the first embodiment will be described with reference to FIGS. 1 and 2. The upstream data is stored in the upstream data storage memory 10 and sequentially read by the read circuit 14. Here, the data length measuring circuit 11 causes the upstream data storage memory 10 to
Each data length read from is measured, the measured data length is notified to the data size counter 15, and is written in the arithmetic memory 12. The data size counter 15 adds the respective data lengths measured by the data length measuring circuit 11 and outputs the added result SIZE to the comparator 16 (step S11).

In the comparator 16, the capacity of the shared band of one upstream frame = burst value, and the data size counter 15
Is compared with the added value SIZE from (step S1
2) When the burst value <SIZE, the reading of the read circuit 14 is interrupted, the addition value SIZE of the data size counter 15 is set to the previous addition value SIZE, and this is notified to the request circuit 17 (step). S1
3). The request circuit 17 outputs to the base station 101 a transmission permission request for the shared band, which uses the previous addition value SIZE notified from the comparator 16 as the requested band (step S14).

When the read circuit 13 receives the upstream band transmission permission notification from the base station 101, it reads the upstream data from the arithmetic memory 12 and transmits it to the base station 101 (step S15). Next, the allocation counter 19 counts up the number N of band permission notifications, outputs the value to the allocation comparator 18 (step S16), and then clears the required band SIZE (step S17). Next, the allocation comparator 18 compares the number of allocations N with the MTU / burst value (step S18). If no, the process returns to step S11, and the above processing is repeated to continuously transmit the shared band for each frame. And step S
When the number of allocations N and MTU / burst value are reached in 18, the data size counter 15 and the comparator 16 are cleared (step S19), and continuous transmission of the shared band is interrupted.

Here, the data size counter 15, the comparator 16 and the request circuit 17 confirm the accumulated data size after the allocation is completed. When the data is accumulated after the allocation, the above operation is repeated again to continuously notify the base station 101 of the upstream band use request. Further, when the allocation up to the MTU is completed, the signal from the allocation counter 19 and the allocation comparator 18 can stop the upstream band use request.

FIG. 3 shows the bandwidth of the upstream frame (burst value)
And MTU are shown. Here, the burst value is 300
0 byte, MTU value is 15000 bytes. Conventionally, the arithmetic memory 12 for temporarily storing the upstream data capable of accumulating 15000 bytes of data has been required for continuous transmission. However, by detecting that the burst value = 3000 bytes of data has been accumulated (accumulation up to FIG. 3) and requesting the base station 101 to use the upstream band, an arithmetic memory for temporarily storing the upstream data The buffer capacity of 12 can be reduced to 3000 bytes. Further, if the buffer capacity of the arithmetic memory 12 is at least twice that of 6000 bytes, it is possible to request next time even if there is no allocation in this frame.

As described above, according to the embodiment of the present invention, when the allocation is completed, the accumulation status of the upstream data is monitored, and when the data accumulation of the upstream burst value or more is detected, the base station 1
By continuously requesting the upstream bandwidth use request to 01 for each frame, the arithmetic memory (hereinafter also referred to as a memory circuit) 12 for temporarily storing the upstream data can be made small.

<Second Embodiment> Referring to FIG. 4, the upstream data storage memory 10, the read circuit 14, the data length measuring circuit 11, the arithmetic memory 12, the data size counter 15, the comparator 16, the request circuit 17, the read circuit 13, The allocation comparator 18 and the allocation counter 19 are the same as those in FIG. The remainder calculation circuit 20 is a circuit that calculates the difference between the data size from the comparator 16 and the burst value. The subtractor 21 is a circuit that subtracts the value given by the remainder calculation circuit 20 from the value given by the data size counter 15.

Embodiment 2 of the present invention with reference to FIG. 4 and FIG.
The operation of will be described. The output from the remainder calculation circuit 20 is the difference between the burst value and the data size requested of the base station 101. For example, when the burst value is 1000 bytes and the required bandwidth is 900 bytes, the remainder calculation circuit 20 outputs 10 bytes.
Output 0 bytes (step S10). When the allocation notification for this request matches, the subtracter 21 subtracts 100 bytes from the value SIZE from the data size counter 15 (step S13-1), and the result is input to the comparator 16. As a result, when the next request is made, comparison up to the burst value +100 can be performed. Note that steps S11 to S19 in FIG. 5 are the same as those in FIG. 1 (Embodiment 1), and therefore description thereof will be omitted.

As described above, according to the second embodiment of the present invention, when the previous request band is data transmission of the upstream signal burst length or less, the difference between the request band and the burst value is carried over and compared. Therefore, even if the data size length (MTU) that can be continuously transmitted is large, the memory circuit scale for accumulating the upstream data can be reduced, and further, the cumulative data size length for upstream transmission can be continuously increased. It is possible to approach the data size length (MTU) that can be transmitted.

<Third Embodiment> In FIG. 6 (and FIG. 7), the upstream data storage memory 10, the read circuit 14, the data length measuring circuit 11, the arithmetic memory 12, the data size counter 15, the comparator 16, and the request circuit 17 are provided. , Read circuit 13
Is the same as in FIG. The cumulative data size counter 23 adds the output count value SIZE for each frame from the data size counter 15 and outputs the cumulative DSIZE to the cumulative comparator 22. The total comparator 22 is the total DSIZE,
It is compared with a preset data length MTU that can be continuously transmitted.

In FIG. 7, the data size counter 15
It is as described above that the comparator 16 issues a transmission request to the request circuit 17 when the added data length from the above exceeds the preset burst length (steps S12 to S1).
5, S17). In step S11-1, the cumulative data size counter 23 latches the output value from the data size counter 15 and accumulates the value, and also resets the value added by the data size counter 15 by the allocation permission signal and transmits the next data. Try to add the data length again. At this time, when the count value DSIZE from the cumulative data size counter 23 exceeds a preset data length MTU capable of continuous transmission, the comparator 16 is stopped by the output signal from the cumulative comparator 22 (step S18-
1 → S19-1). As a result, it is possible to make a transmission permission request for a continuous uplink shared band for each frame within a preset data length MTU capable of continuous transmission.

As described above, according to the third embodiment of the present invention, the data size counter 16 continuously makes a request for each burst unit (capacity of shared bandwidth of one frame) for each frame, and the accumulated data size counter 16 23 and cumulative comparator 2
Data length M that can be transmitted continuously set in advance by 2
By making continuous transmission permission requests for the upstream shared band for each frame within TU, the memory circuit 12 for temporarily storing the upstream data can be made smaller.

<Fourth Embodiment> In FIG. 8, the upstream data storage memory 10, the read circuit 14, the data length measuring circuit 11, the arithmetic memory 12, the data size counter 15, the comparator 16, the request circuit 17, the read circuit 13, The cumulative data size counter 23 and the cumulative comparator 22 are the same as those in FIG. The remainder calculation circuit 20 calculates the difference between the requested bandwidth from the comparator 16 and the burst value, and the subtractor 21 uses the value given from the data size counter 15 to calculate the remainder calculation circuit 20.
Subtract the value given by The operation methods of the remainder calculation circuit 20 and the comparator 16 in the fourth embodiment are the same as those in the second embodiment.

As described above, according to the fourth embodiment of the present invention, the difference between the required bandwidth and the burst value is carried forward and compared when the previous required bandwidth is the data transmission of the upstream signal burst length or less. By this, even if the data size length (MTU) that can be transmitted continuously is large, the memory circuit scale for accumulating the upstream data can be reduced, and the cumulative data size length for upstream transmission can be continuously transmitted. It is possible to approach the data size length (MTU) that can be achieved.

<Fifth Embodiment> In FIG. 9, the upstream data storage memory 10, the read circuit 14, the data length measuring circuit 11, the arithmetic memory 12, the data size counter 15, the comparator 16, the request circuit 17, the read circuit 13, Cumulative data size counter 23, cumulative comparator 22, remainder calculation circuit 2
0 and the subtracter 21 are the same as those in FIG. 8 (Embodiment 4).
The cumulative remainder calculation circuit 25 calculates the transmission data size length (MT) that can be transmitted continuously with the cumulative data size from the subtractor 24.
U), and the subtractor 24 subtracts the value of the cumulative remainder calculation circuit 25 from the value from the cumulative data size counter 23. The operations of the cumulative remainder calculation circuit 25 and the cumulative comparator 22 in FIG. 9 are the same as those of the remainder calculation circuit 20 and the comparator 16.

As described above, according to the fifth embodiment of the present invention, the difference between the required bandwidth and the burst value is carried forward and compared when the previous required bandwidth is the data transmission of the upstream signal burst length or less. At the same time, when the previous request bandwidth was the data transmission of the burst length (MTU) or less that can be continuously transmitted, the difference between the requested data size and the burst value is carried forward and compared to continuously transmit the difference. Even if the possible data size length (MTU) is large, the scale of the memory circuit 12 for storing the upstream data can be reduced, and further, the cumulative data size length for upstream transmission is
It is possible to approach the data size length (MTU) that can be continuously transmitted.

In addition, in the first to fifth embodiments, in the comparison operation with the burst length of the comparator 16, detection is performed by the addition value> the burst value, but when the shared band is divided into a plurality of parts, (Burst length-added value) <Division band can be similarly implemented. In addition, in the description of the fifth embodiment, an example in which the cumulative data size counter 23 is used has been described, but the same applies to the configuration using the allocation counter 19 and the allocation comparator 18 described in the first and second embodiments. It is feasible.

<Sixth Embodiment> In FIG. 10, a frame conversion circuit 30 converts the data from the upstream data storage memory 10 into a frame and outputs it to the data length measuring circuit 11. Others are the same as in FIG. As described above, according to the sixth embodiment of the present invention, the received signal is stored in the upstream data storage memory 10, and then the frame conversion is performed by the instruction from the comparator 16 and the read circuit 14. By processing such as adding overhead after frame conversion, it is possible to reduce the scale of the memory circuit 12 that stores upstream data even if the data size length (MTU) that can be continuously transmitted is large, while suppressing an increase in the memory that is stored. Further, the cumulative data size length for upstream transmission can be made closer to the data size length (MTU) that can be transmitted continuously.

<Embodiment 7> In FIG. 11, the upstream signal from the terminal station 100 is stopped by the downstream signal from the base station 101. The downlink signal detection circuit 31 determines a stop command from the base station 101 based on the downlink signal, and gives an instruction to stop reading data from the uplink data storage memory 10. Others are the same as above.

As described above, according to the seventh embodiment of the present invention, the reception signal stored in the upstream data storage memory 10 is not read, and only the upstream data of the operation memory 12 is transmitted for a short time. By stopping the uplink transmission at 1, the response to the stop control from the base station 101 can be responded quickly, whereby the uplink reception buffer on the base station 101 side can be made small.

<Embodiment 8> In FIG. 12, the priority frame transmission circuit 33 preferentially generates a signal to be transmitted, and the selector 32 selects data from the upstream data storage memory 10 and the priority frame transmission circuit 33. And outputs it to the data length measuring circuit 11. Further, when there is a transmission request from the priority frame transmission circuit 33 at the time of the next data transmission request from the comparator 16, the selector selection circuit 34 outputs the A1 signal to instruct the output from the priority frame transmission circuit 33. When there is no request, the A2 signal is output to instruct the read circuit 14 to output, and at the same time, the switching signal S1 to the selector 32 is output. Others are the same as FIG.

As described above, according to the eighth embodiment of the present invention, when data to be preferentially transmitted is generated, it can be transmitted after the upstream data in the arithmetic memory 12, so that a short waiting time is obtained. Then, transmission to the base station 101 can be performed.

<Embodiment 9> In FIG. 13, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, and the request circuit 17 are the same as those in FIG. The request data size counter 41 adds the data lengths from the data length measuring circuit 11 and notifies the request circuit 17 of the added data length. The request circuit 17 requests the transmission permission to the base station 101 if there is data accumulation. The memory monitoring circuit 47 monitors the arithmetic memory 12, and if data can be accumulated in the arithmetic memory 12, the read circuit 48 causes the upstream data accumulation memory 1 to be stored.
The read enable signal from 0 is notified, while the arithmetic memory 1
If it is not possible to store data in 2, the read circuit 48
Is notified of stop of reading from the upstream data storage memory 10.

The allocation data size counter 43 is the base station 1
The allocation data length from 01 is added, and the allocation comparator 45 compares the added data length from the allocation data size counter 43 with the uplink data size length (MTU) that can be continuously transmitted by the terminal station 100. Size counter 43
The read instruction from the arithmetic memory 12 is sent to the transmission read circuit 46 until the added data length from the above exceeds the MTU. The transmission read circuit 46 reads data from the arithmetic memory 12 according to an instruction from the allocation comparator 45. When it is detected that the added data length from the assigned data size counter 43 exceeds MTU, the arithmetic memory 12 is instructed by the transmission read circuit 46 to the maximum value where the added data length from the assigned data size counter 43 does not exceed MTU. Read data.

The read data size counter 42 adds the data length read by the transmission read circuit 46, and the transmission comparator 44 requests when the addition data length from the read data size counter 42 exceeds MTU. Instruct to stop the transmission request from the circuit 17.

As described above, according to the ninth embodiment of the present invention, the transmission permission is requested to the base station 101 if there is data accumulation, and the allocation data length is assigned when the allocation notification is issued to the uplink transmission permission request of the shared band. Is provided, and the addition data length from the assignment data size counter 43 is compared with MTU, and the addition data length is MTU.
When it is detected that the number exceeds the MTU, the upstream data transmission is stopped, and when the addition data length from the read data size counter 42 is detected to exceed the MTU, the upstream transmission permission request is stopped. , The size of the memory circuit 12 for storing the upstream data can be reduced even if the upstream data size length (MTU) that can be continuously transmitted is large, and the allocation data size counter 4 can be used at the time of notification of allocation.
By comparing the addition data length from 3 and MTU, uplink transmission for MTU can be performed.

<Embodiment 10> In FIG. 14, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, the request circuit 17, and the request data size counter 4 are shown.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, memory monitoring circuit 47, read circuit 4
8 is the same as in FIG.

When the reset circuit 49 detects that the added data length from the read data size counter 42 exceeds MTU, the transmission comparator 44 detects a signal for notifying the request circuit 17 of the request stop. The reset circuit clears the request data size counter 41, the read data size counter 42, and the assigned data size counter 43.

As described above, according to the tenth embodiment of the present invention, when it is detected that the added data length of the read data length from the arithmetic memory 12 exceeds MTU, the upstream transmission request is stopped and Request data size counter 4
By clearing 1, the read data size counter 42, and the assigned data size counter 43, it is possible to reduce the memory circuit scale for accumulating the upstream data even if the upstream data size length (MTU) that can be continuously transmitted is large.
Further, uplink transmission for MTU can be continuously performed.

<Embodiment 11> Referring to FIG. 15, an upstream data storage memory 10, a data length measuring circuit 11, an arithmetic memory 12, a request circuit 17, and a request data size counter 4 are provided.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, read circuit 48, reset circuit 49
Is similar to FIG.

The request comparator 50 is a circuit for notifying the read circuit 48 of the stop of data reading from the upstream data storage memory 10 when detecting that the added data length from the request data size counter 41 exceeds MTU. .

As described above, according to the eleventh embodiment of the present invention, when it is detected that the added data length from the requested data size counter 41 exceeds MTU, the data reading from the upstream data storage memory 10 is performed. Upstream data size length (MTU) that can be transmitted continuously by stopping
Memory circuit 1 for storing upstream data even when the value is large
2 can be reduced in size, and further, uplink transmission for MTU can be continuously performed.

<Embodiment 12> In FIG. 16, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, the request circuit 17, and the request data size counter 4 are shown.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, read circuit 48, reset circuit 4
9. The request comparator 50 is the same as in FIG.

The remainder calculation circuit 51 calculates the difference between the MTU and the addition data length from the read data size counter 42, and the MTU setting circuit 52 is a circuit which adds the difference value from the remainder calculation circuit 51 to MTU. , This (MTU +
The difference value) is the MTU for the next uplink continuous transmission determination.

As described above, according to the twelfth embodiment of the present invention, when it is detected that the added data length from the assigned data size counter 43 in one continuous upstream transmission exceeds MTU, The difference from the added data length from the read data size counter 42 that is actually transmitted in the upstream is carried over to the MTU of the next continuous upstream transmission determination, so that the upstream data size length (MT
Even if U) is a large value, the scale of the memory circuit 12 for storing upstream data can be reduced, and the data size length for upstream transmission can be made closer to the upstream data size length (MTU) that can be continuously transmitted by the terminal station 100. be able to.

<Embodiment 13> In FIG. 17, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, the request circuit 17, and the request data size counter 4 are shown.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, read circuit 48, reset circuit 4
9, the request comparator 50, the remainder calculation circuit 51, and the MTU setting circuit 52 are the same as those in FIG.

The data size counter 53 adds the data lengths from the data length measuring circuit 11. Then, when the initial comparator 55 detects that the addition data length from the data size counter 53 exceeds the preset transmission initial value, the addition data length of the data size counter 53 is set to the request data size counter 41. In addition to the notification, the data size measuring circuit 11 notifies the transmission selector 54 of the measured data length.
Sends an instruction to switch to the requested data size counter 41. The transmission selector 54 selects the destination of the data length according to the instruction from the initial comparator 55. While the data accumulated in the arithmetic memory 12 does not exceed the preset transmission initial value, the request data size counter 41 is not notified of the data length, and therefore the request circuit 17 does not make an upstream transmission request.

As described above, according to the thirteenth embodiment of the present invention, when it is detected that the data length to be stored in the arithmetic memory 12 exceeds the preset transmission initial value,
This is to start an upstream transmission request from the request circuit 17, and by comparing the initial accumulated data length in the arithmetic memory 12 with the initial transmission value, the upstream data size length (MTU) that can be transmitted continuously is a large value. However, the scale of the memory circuit 12 for storing the upstream data can be reduced, and further,
When the amount of data stored in the memory circuit 12 is small, no request is sent in order to effectively use the communication band between the terminal station 100 and the base station 101, and the first upstream transmission request is set to be equal to or higher than the preset transmission initial value. , MTU uplink transmission can be continuously performed.

<Embodiment 14> In FIG. 18, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, the request circuit 17, and the request data size counter 4 are shown.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, read circuit 48, reset circuit 4
9, the request comparator 50, the remainder calculation circuit 51, and the MTU setting circuit 52 are the same as those in FIG.

The priority frame transmission circuit 57 is for generating data to be preferentially transmitted. Selector 56
Monitors the read data from the upstream data storage memory 10 and the generation of data to be preferentially transmitted by the priority frame transmission circuit 57. If there is no data to be preferentially transmitted, the read data from the storage memory circuit 10 is set to the data length. Measuring circuit 1
1, and if there is data to be preferentially transmitted, the preferential transmission data of the priority frame transmitting circuit 57 is notified to the data length measuring circuit 11.

As described above, according to the fourteenth embodiment of the present invention, when the data to be preferentially transmitted occurs, the selector immediately notifies the data length measuring circuit 11 of the preferential transmission data of the priority frame transmitting circuit 57. By doing so, it is possible to reduce the scale of the memory circuit 12 that stores the upstream data even if the upstream data size length (MTU) that can be continuously transmitted is large, and further, when the data to be preferentially transmitted occurs, immediately. The priority transmission data is put in the uplink data size length (MTU) that can be continuously transmitted by the terminal station 100 without changing the circuit scale of the arithmetic memory 12, and the uplink transmission for MTU is continuously performed. be able to.

<Embodiment 15> In FIG. 19, the upstream data storage memory 10, the data length measuring circuit 11, the arithmetic memory 12, the request circuit 17, and the request data size counter 4 are shown.
1, read data size counter 42, assigned data size counter 43, transmission comparator 44, assignment comparator 45, transmission read circuit 46, read circuit 48, reset circuit 4
9, the request comparator 50, the remainder calculation circuit 51, and the MTU setting circuit 52 are the same as those in FIG.

The memory monitoring circuit 61 monitors the presence / absence of data to be preferentially transmitted by the priority frame transmitting circuit 57. If there is no data to be preferentially transmitted, the selector 58 notifies the transmission read circuit 46 of transmission permission, and the memory monitoring circuit 6
When it is notified from 1 that there is data to be preferentially transmitted, the read destination is switched to the preferential transmission read circuit 59. The priority transmission read circuit 59 reads data from the priority frame transmission circuit 57 according to an instruction from the selector 58. The transmission selector 60 switches data transmission between the arithmetic memory 12 and the priority frame transmission circuit 57.

As described above, according to the fifteenth embodiment of the present invention, the presence or absence of the data to be preferentially transmitted is determined at the time of the allocation notification for the upstream transmission permission request, and if there is the data to be preferentially transmitted, the arithmetic memory is used. Upstream data size length (MTU) that can be continuously transmitted by performing transmission from the priority frame transmission circuit 57 in preference to data from 12
Memory circuit 1 for storing upstream data even when the value is large
2 can be reduced in size, and when data to be preferentially transmitted occurs at the time of notification of allocation, uplink transmission is immediately performed without changing the circuit scale of the arithmetic memory 12, and preferential transmission should be performed. Uplink transmission for MTU including data can be continuously performed.

<Embodiment 16> FIG. 20 shows the configuration of a terminal station 100 having the band control circuit 104 of the above embodiment. Here, the first embodiment will be described as an example. 20, a terminal 111 is connected to a terminal such as a personal computer, and a reception IF (interface) 103 processes a signal from the terminal and stores it in the upstream data storage memory 10. The band control circuit 104 outputs the upstream transmission permission request 2, receives the band permission notification 3 from the base station 101,
The up signal 4 is output. The band control circuit 104 has the same configuration as that shown in FIG. The transmission IF (interface) 105 connects to the base station 101,
And the uplink transmission permission request 2 from the terminal 109 to the base station 101.
Send to.

The reception IF 108 receives the signal from the base station 101 via the terminal 110 and processes it, but when it receives the band permission notification, it notifies the band control circuit 104,
If it is a data signal, the data is stored in the storage memory 107. The transmission IF 106 transmits data to the terminal via the terminal 102 when there is data in the storage memory 107.

Data from the terminal is processed by the reception IF 103 and stored in the upstream data storage memory 10. After that, the bandwidth control circuit 104 causes the upstream data storage memory 10
The data is read from and the upstream transmission permission request is output. The base station 101 is notified via the transmission IF 105. A band permission notification for this is input from the reception IF 108, and is notified to the band control circuit 104 after the reception IF 108 is detected. When there is a permission notification, the uplink data is output to the base station 101 via the transmission IF 105. In addition, the downlink data from the base station 101 to the terminal is the reception IF.
108, the storage memory 107 and the transmission IF 1
It is output via 06. In this configuration, the band control circuit 10
4 can have the same circuit configuration as that of the first embodiment.
Thereby, the same effect can be obtained.

As described above, according to the sixteenth embodiment of the present invention, as in the case of the first embodiment, the accumulation situation of the upstream data is monitored, and when the data accumulation of the upstream burst value or more is detected, the base station 101 By continuously requesting the use of the upstream band for each frame, the memory circuit for temporarily storing the upstream data can be downsized. In the above example, the band control circuit 104 has been described as the first embodiment, but the effect can be obtained by using the configurations of the band control circuits shown in the other second to fifteenth embodiments.

[0075]

As described above, according to the first aspect of the present invention, the transmission permission is requested to the base station when the accumulated amount of upstream data exceeds the band of the predetermined capacity in the upstream frame. The memory circuit scale for accumulating the upstream data can be reduced to the above-mentioned predetermined capacity. According to the second aspect of the invention, the transmission permission is requested from the base station when it is detected that the uplink data has been accumulated, so that the memory circuit scale for accumulating the uplink data can be reduced. According to the invention of claim 3, when the accumulated uplink data amount exceeds a predetermined transmission initial value, the transmission permission is requested to the base station for the transmission initial value. Therefore, the uplink data is accumulated. The memory circuit scale to be set can be reduced. According to the invention described in claim 4, since the capacity of the storage means is at least twice the predetermined capacity, when the band is not allocated by the base station,
You can request permission to send next time. According to the invention of claim 5, when the cumulative total of the amount of transmission data to the base station at the time of continuous transmission permission request becomes the maximum transfer unit,
Since it is configured to cancel or suspend the continuous transmission permission request,
Even if the scale of the memory circuit for storing the upstream data is reduced, the maximum transfer unit can be continuously transmitted.
According to the invention described in claim 6, when the number of allocations by the base station at the time of continuous transmission permission request becomes the number obtained by dividing the maximum transfer unit by the predetermined capacity, the continuous transmission permission request is suspended or interrupted. Therefore, even if the memory circuit scale for storing the upstream data is reduced, the maximum transfer unit can be continuously transmitted. According to the invention of claim 7, the remainder obtained by subtracting the band requested to the base station from the predetermined capacity in the previous frame is calculated, and the remainder is subtracted from the amount of upstream data accumulated in the accumulating means in the next frame. When the capacity becomes equal to or larger than the predetermined capacity, the transmission permission is requested to the base station. Therefore, when the amount of data transmitted in the previous frame is smaller than the predetermined capacity, the difference can be transmitted in the next frame. Claim 8
According to the described invention, the remainder obtained by subtracting the cumulative amount of transmission data to the base station at the time of the last continuous transmission permission request from the maximum transfer unit is calculated, and the capacity obtained by subtracting the remainder from the next transmission data amount is the maximum transfer amount. When the unit becomes a unit, the continuous transmission permission request is canceled or interrupted, so if the amount of data continuously transmitted last time is less than the maximum transfer unit,
The difference can be sent next time. According to the invention described in claim 9, since the frame is converted and transmitted, the scale of the memory circuit for storing the upstream data can be further reduced. According to the tenth aspect of the invention, since the storage in the storage means is stopped or interrupted by the end notification of the continuous transmission permission from the base station, the uplink reception buffer on the base station side can be made small. According to the invention as set forth in claim 11, it is configured to have a counter for accumulating the amount of upstream data transmitted continuously for each frame, and means for resetting the counter when the accumulated result of the counter reaches the maximum transfer unit. Therefore, it is possible to continuously transmit up to the maximum transfer unit with a simple circuit configuration. According to the twelfth aspect of the present invention, since the frame to be transmitted preferentially is stored and transmitted with priority over the frame to be normally transmitted, in a configuration in which the memory circuit scale for storing the upstream data is small, Even if a frame to be preferentially transmitted is generated, it can be immediately prioritized and transmitted over a frame to be normally transmitted. According to the thirteenth aspect of the present invention, the continuous transmission permission request is stopped or interrupted when the cumulative total of the preferentially transmitted frame and the normally transmitted frame becomes the maximum transfer unit. In a configuration in which the memory circuit to be stored has a small scale, even if a frame to be preferentially transmitted occurs, it can be immediately and preferentially transmitted over a frame to be normally transmitted, and a frame to be preferentially transmitted and a frame to be normally transmitted. Can be continuously transmitted up to the maximum transfer unit. According to the invention of claim 14, since the band control circuit according to any one of claims 1 to 13 is provided, a terminal station device having a small memory circuit scale for accumulating upstream data is realized. can do.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a band control circuit according to the present invention.

FIG. 2 is a flowchart for explaining continuous transmission processing of the band control circuit of FIG.

FIG. 3 is an explanatory diagram showing an example of continuous transmission processing of the band control circuit of FIG.

FIG. 4 is a block diagram showing a second embodiment of a band control circuit according to the present invention.

5 is a flowchart for explaining a continuous transmission process of the band control circuit of FIG.

FIG. 6 is a block diagram showing a third embodiment of a band control circuit according to the present invention.

7 is a flowchart for explaining a continuous transmission process of the band control circuit of FIG.

FIG. 8 is a block diagram showing a fourth embodiment of a band control circuit according to the present invention.

FIG. 9 is a block diagram showing a fifth embodiment of a band control circuit according to the present invention.

FIG. 10 is a block diagram showing a sixth embodiment of a band control circuit according to the present invention.

FIG. 11 is a block diagram showing a seventh embodiment of the band control circuit according to the present invention.

FIG. 12 is a block diagram showing an eighth embodiment of a band control circuit according to the present invention.

FIG. 13 is a block diagram showing a ninth embodiment of the band control circuit according to the present invention.

FIG. 14 is a tenth embodiment of a band control circuit according to the present invention.
Block diagram showing

FIG. 15 is an eleventh embodiment of the band control circuit according to the present invention.
Block diagram showing

FIG. 16 is a twelfth embodiment of the band control circuit according to the present invention.
Block diagram showing

FIG. 17 is a thirteenth embodiment of the band control circuit according to the present invention.
Block diagram showing

FIG. 18 is a fourteenth embodiment of the band control circuit according to the present invention.
Block diagram showing

FIG. 19 is a fifteenth embodiment of band control circuit according to the present invention.
Block diagram showing

FIG. 20 is a block diagram showing a terminal station device according to the present invention.

FIG. 21 is a block diagram showing a conventional band control circuit.

FIG. 22 is an explanatory diagram showing a communication sequence between a terminal station device and a base station device according to the present invention.

FIG. 23 is a flowchart for explaining continuous transmission processing of the band control circuit of FIG.

[Explanation of symbols]

1 Upstream data input terminal 2 Uplink data transmission request terminal 3 Uplink data transmission permission notification terminal 4 Uplink data transmission terminal 5 Downlink data receiving terminal 10 Upstream data storage memory 11 Data length measuring circuit 12 Arithmetic memory 13, 14, 48 readout circuit 15 Data size counter 16 Comparator 17 Required circuit 18 Allocation comparator 19 quota counter 20, 51 Remainder calculation circuit 21, 24 Subtractor 22 Cumulative comparator 23 Cumulative data size counter 25 Cumulative remainder calculation circuit 30 frame conversion circuit 31 Downlink signal detection circuit 32, 56, 58 selector 33, 57 priority frame transmission circuit 34 Selector selection circuit 41 Request data size counter 42 Read data size counter 43 Allocation data size counter 44 Transmitter comparator 45 Assignment comparator 46 Transmission / readout circuit 47, 61 memory monitoring circuit 49 Reset circuit 50 demand comparator 52 MTU setting circuit 53 Data size counter 54 Send selector 55 Initial comparator 59 Priority transmission read circuit 60 Send selector 101 base station 102 Output terminal to terminal 103 Reception IF circuit with terminal 104 Band control circuit 105 Transmission IF Circuit to Base Station 106 Transmission IF circuit to terminal 107 Storage memory for data from the base station to the terminal 108 IF circuit from base station 109 Transmission terminal to base station 110 Receiving terminal from base station

Claims (17)

[Claims] 1. A band control circuit for each terminal station to transmit uplink data to a base station via a band of a predetermined capacity in an uplink frame, comprising: storage means for storing the uplink data, and storage in the storage means. When the amount of upstream data is equal to or more than the predetermined capacity, the base station is requested to transmit permission including the bandwidth request of the predetermined capacity, and the upstream data is transmitted to the band allocated by the base station. A band control circuit, further comprising: a unit that repeats the transmission permission request continuously for each frame when the amount of uplink data accumulated in the accumulating unit again in a frame becomes equal to or larger than the predetermined capacity. 2. In a band control circuit for each terminal station to transmit uplink data to a base station via a band of a predetermined capacity in an uplink frame, a storage unit for storing the uplink data, and the uplink data When it is detected that the data has been accumulated in the accumulating means, it requests the base station for transmission permission including the bandwidth request for the storage capacity, transmits the uplink data in the band allocated by the base station, and again in the next frame. A band control circuit comprising: a unit that repeats the transmission permission request continuously for each frame when it is detected that the upstream data is stored in the storage unit. 3. A band control circuit for each terminal station to transmit uplink data to a base station via a band of a predetermined capacity in an uplink frame, wherein a storage unit stores the uplink data and a storage unit stores the uplink data. When the amount of upstream data exceeds a predetermined amount of transmission initial value, the base station is requested to transmit permission including the bandwidth request for the storage capacity, and the upstream data is transmitted to the band allocated by the base station, A means for continuously repeating the transmission permission request for each frame when the amount of uplink data accumulated in the accumulating means again in the next frame exceeds the transmission initial value of the predetermined amount. Band control circuit. 4. The band control circuit according to claim 1, wherein a capacity of the storage means is at least twice the predetermined capacity. 5. A method of accumulating the amount of transmission data to the base station at the time of the continuous transmission permission request, and canceling or interrupting the continuous transmission permission request when the accumulated data amount becomes a maximum transfer unit. The band control circuit according to any one of claims 1 to 4, which is characterized in that. 6. The number of allocations by the base station at the time of the continuous transmission permission request is counted, and when the count value is the maximum transfer unit divided by the predetermined capacity,
The band control circuit according to claim 1, wherein the continuous transmission permission request is stopped or interrupted. 7. A remainder calculated by subtracting a band requested to the base station from the predetermined capacity in a previous frame,
The transmission permission is requested to the base station when the capacity obtained by subtracting the remainder from the amount of upstream data accumulated in the accumulating means in the next frame becomes equal to or larger than the predetermined capacity. The band control circuit according to any one of 4, 5, and 6. 8. A cumulative amount of transmission data to the base station at the time of the previous continuous transmission permission request is accumulated to calculate a remainder by subtracting the previous cumulative data amount from a maximum transfer unit,
8. The continuous transmission permission request is suspended or interrupted when the capacity obtained by subtracting the remainder from the next transmission data amount becomes the maximum transfer unit. Band control circuit. 9. The band control circuit according to claim 1, wherein a frame from the terminal is converted into another frame and stored in the storage means. 10. The band control circuit according to claim 1, wherein the storage in the storage unit is stopped or interrupted by the end notification of the continuous transmission permission from the base station. 11. A counter comprising: a counter for accumulating the amount of upstream data transmitted continuously for each frame; and a means for resetting the counter when the accumulated result of the counter reaches the maximum transfer unit. Claim 1 to 1
The band control circuit according to any one of 0. 12. The bandwidth control circuit according to claim 1, wherein the frame to be preferentially transmitted is stored in the storage means and transmitted in preference to the frame to be normally transmitted. . 13. The bandwidth according to claim 11, wherein the continuous transmission permission request is stopped or interrupted when the cumulative total of frames that are normally transmitted from the preferentially transmitted frames becomes a maximum transfer unit. Control circuit. 14. A terminal station device having the band control circuit according to claim 1. Description: 15. A bandwidth control method for each terminal station to store uplink data in a storage means and transmit the data to a base station via a band of a predetermined capacity in an uplink frame, the uplink data stored in the storage means. Detecting the amount, and when the amount of upstream data accumulated in the accumulating means becomes equal to or larger than the predetermined capacity, a transmission permission including a bandwidth request of the predetermined capacity is requested from the base station and assigned by the base station. Transmitting upstream data in the allocated band, and repeating the transmission permission request continuously for each frame when the amount of upstream data accumulated in the accumulating means again in the next frame exceeds the predetermined capacity. A bandwidth control method comprising: 16. A bandwidth control method for each terminal station to store uplink data in a storage means and transmit the data to a base station via a band of a predetermined capacity in an uplink frame, wherein the uplink data stored in the storage means A step of detecting an amount, and a band allocated by the base station by requesting the base station for a transmission permission including a band request for the storage capacity when detecting that the upstream data is stored in the storage means. And transmitting the upstream data again in the next frame, and repeating the transmission permission request for each frame when it is detected again that the upstream data is accumulated in the accumulating means in the next frame. Bandwidth control method. 17. A bandwidth control method for each terminal station to store uplink data in a storage means and transmit it to a base station via a band of a predetermined capacity in an uplink frame, wherein the uplink data stored in the storage means A step of detecting the amount, and when the amount of upstream data accumulated in the accumulating means exceeds a transmission initial value of a predetermined amount, the base station is requested to request transmission permission including a bandwidth request for the storage capacity. When the amount of upstream data stored in the storage means again exceeds the predetermined transmission initial value in the next frame, the transmission permission request is continuously transmitted for each frame. A band control method comprising the steps of: