JP2022178213A - Communication control apparatus, communication control method, and communication control program - Google Patents

Abstract

To provide an apparatus with suppressed overhead.SOLUTION: A communication control apparatus 10 includes: a storage unit 102 which stores first data; an acquisition unit 101 which acquires a new data element as second data; a selection unit 1031 which selects, when priority for transmitting the second data is higher than a predetermined reference value, first data, as connection destination data, out of multiple pieces of first data, for which a sum of first data size of the first data and second data size of the second data is smaller than a first threshold value, or selects, when the priority is lower than the predetermined reference value, first data of the above multiple pieces of first data, as connection destination data, for which the sum of the data sizes is smaller than a second threshold value; a combined data generation unit 1032 which combines the connection destination data with the second data to generate combined data, and stores the combined data, as first data, in the storage unit; and a transmission unit 104 which transmits at least one first data, out of the multiple pieces of first data, as transmission data.SELECTED DRAWING: Figure 1

Description

The present invention relates to a communication control device, a communication control method, and a communication control program for controlling data transmission in a communication device.

Generally, in an electronic control device having a communication function, when data is generated in a user space such as an application, data transmission processing is performed via a kernel in order to transmit the data using a communication channel. In the kernel, switching from the running process to the sending process is performed in order to perform data sending processing, and small size data generated in user space is sent to the kernel with high frequency. Then, communication performance may be degraded due to the overhead associated with process switching.

Therefore, conventionally, it is known to reduce overhead and prevent deterioration of communication functions by combining multiple pieces of small data generated in user space and transmitting the combined data to the kernel. there is Furthermore, in conjunction with such a technique, it is known to forcibly perform data transmission processing when data requiring urgent processing arrives.

For example, in Patent Document 1, a plurality of data are combined into one large data block, and when the size of the data block exceeds a threshold value, or when the data block being combined contains highly urgent data, It describes selecting a memory suitable for the size of the data block being combined from among the packet memories having different memory capacities, and transferring the data block being combined to the selected packet memory.

Japanese Unexamined Patent Application Publication No. 2008-11015

Here, the inventors have discovered the following problems.
According to the method described in Patent Document 1, by using packet memories with different memory capacities, it becomes unnecessary to search for unused areas in the memories, and the amount of processing can be reduced. However, if highly urgent data is received continuously, the data will be transferred each time. can't Therefore, it is desirable to perform communication control that has the effect of reducing overhead even when highly urgent data is received continuously.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to realize a communication control apparatus and the like capable of suppressing an increase in overhead while transmitting highly urgent data without delay.

The transmission control device of the present disclosure is
a storage unit (102) storing a plurality of first data including one or more data elements;
an acquisition unit (101) for acquiring a new data element as second data;
When the priority of transmitting the second data is higher than a predetermined reference value, among the plurality of first data, the first data size of the first data and the second data size of the second data selects the first data whose sum with the data size of is smaller than the first threshold as the data to be combined,
when the priority is lower than the predetermined reference value, the sum of the first data size and the second data size among the plurality of first data is larger than the first threshold selecting the first data that is smaller than the second threshold, which is the threshold, as the binding destination data;
a selection unit (1031);
a combined data generation unit (1032) that combines the combination destination data and the second data to generate combined data and stores the combined data in the storage unit as first data;
a transmitter (104) configured to transmit at least one of the plurality of first data as transmission data;

It should be noted that the numbers in parentheses attached to the constituent elements of the invention described in the claims and this section indicate the corresponding relationship between the present invention and the embodiments described later, and are not intended to limit the present invention. do not have.

With the configuration as described above, the communication control apparatus of the present disclosure combines low-priority data with other data until it reaches a large data size and transmits the data, and also combines high-priority data with other data. By combining and transmitting without delay, an increase in overhead can be suppressed.

FIG. 2 is a block diagram showing a configuration example of a communication control device according to Embodiments 1 and 2; 4 is a diagram for explaining data stored in a storage unit of the communication control device according to the first and second embodiments; FIG. 4 is a diagram for explaining data stored in a storage unit of the communication control device according to the first and second embodiments; FIG. FIG. 4 is a diagram for explaining the operation of the communication control device according to the first and second embodiments; FIG. 5 is a diagram for explaining combined data generated by the communication control device of the second embodiment; FIG. 5 is a diagram for explaining combined data generated by the communication control device of the second embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

It should be noted that the present invention means the invention described in the scope of claims or the section of Means for Solving the Problems, and is not limited to the following embodiments. In addition, at least the words and phrases in angle brackets mean the words and phrases described in the claims or the means for solving the problems section, and are not limited to the following embodiments.

The configurations and methods described in the dependent claims are arbitrary configurations and methods in the invention described in the independent claims. The configurations and methods of the embodiments corresponding to the configurations and methods described in the dependent claims, and the configurations and methods described only in the embodiments without being described in the claims, are optional configurations and methods in the present invention. The configuration and method described in the embodiment when the description of the claims is broader than the description of the embodiment are also arbitrary configurations and methods in the present invention in the sense that they are examples of the configuration and method of the present invention. . In either case, the essential features and methods of the invention are described in the independent claims.

The effects described in the embodiments are the effects when having the configuration of the embodiment as an example of the present invention, and are not necessarily the effects of the present invention.

When there are multiple embodiments, the configuration disclosed in each embodiment is not limited to each embodiment, but can be combined across the embodiments. For example, a configuration disclosed in one embodiment may be combined with another embodiment. Further, the configurations disclosed in each of the plurality of embodiments may be collected and combined.

The problems described in the Problems to be Solved by the Invention are not known problems, but were independently discovered by the inventors, and are facts that affirm the inventive step of the invention together with the structure and method of the present invention.

1. Embodiment 1
(1) Configuration of Communication Control Device 10 The configuration of the communication control device 10 of the first embodiment will be described with reference to FIG. The communication control device 10 includes an acquisition unit 101 , a storage unit 102 , a control unit 103 and a transmission unit 104 .

Acquisition unit 101 is a data acquisition unit that acquires a new data element (corresponding to “second data”). For example, the acquisition unit 101 acquires a new data element from the application each time an application installed in a communication terminal device (not shown) including the communication control device 10 generates a new data element. Alternatively, the acquisition unit 101 may acquire data elements from a device different from the communication control device 10 via a network. In the following embodiments, the data element newly acquired by the acquiring unit 101 will be referred to as acquired data.

Although not shown in FIG. 1, data elements newly acquired by the acquisition unit 101 are temporarily stored in FIFO (First In First Out) memory until they are stored in the storage unit 102 under the control of the control unit 103. may be stored.

The storage unit 102 is a memory that stores multiple data (corresponding to “first data”) including one or multiple data elements. For example, the storage unit 102 is assumed to be a volatile memory such as a DRAM or SRAM, but may be a non-volatile memory such as a flash memory or a hard disk (HDD). In the following embodiments, a plurality of data saved in the saving unit 102 are each referred to as saved data.

2 and 3 are diagrams for explaining saved data saved in the saving unit 102. FIG. In the examples shown in FIGS. 2 and 3, the storage unit 102 has buffers #1 to #n, and each buffer stores storage data. Therefore, the storage unit 102 can store up to n pieces of storage data. A data element included in the saved data is a data element previously obtained by the obtaining unit 101 . The number of data elements that make up the saved data is arbitrary, and if it includes a plurality of data elements like the saved data in buffer #1, of course, it also includes only one data element like the saved data in buffer #3. There is also Each data element that constitutes the stored data has information indicating the priority of transmitting the data element.

In the examples of FIGS. 2 and 3, one storage unit 102 has a plurality of buffers (#1 to #n), and each of the plurality of buffers stores storage data. ing. However, the communication control device 10 may have a plurality of storage units, and the plurality of storage units may each store storage data.

Control unit 103 controls operations of acquisition unit 101 , storage unit 102 , and transmission unit 104 . In addition, control section 103 itself implements combination destination data selection section 1031 , combination data generation section 1032 , and transmission data selection section 1033 .

The combination destination data selection unit 1031 (corresponding to the “selection unit”) selects the data size (corresponding to the “first data size”) of each of the plurality of saved data saved in the saving unit 102, the “priority ” and the data size of the acquired data (corresponding to “second data size”), one piece of saved data is selected from among the plurality of pieces of saved data saved in the saving unit 102 . The stored data selected by the combination destination data selection unit 1031 is a candidate for data to be combined with the acquired data by the combination data generation unit 1032, which will be described later. Therefore, the data selected by the combination destination data selection unit 1031 can be said to be the combination destination data of the acquired data.

Here, "priority" is an index indicating the priority of data transmission. This index is set based on predetermined evaluation criteria such as the allowable delay time of data and the type of data, for example.

Specifically, the combination destination data selection unit 1031 determines whether or not the priority of transmitting the acquired data is “predetermined” and “reference value” or “higher”. Here, if it is determined that the priority of the acquired data is higher than the predetermined reference value, the combination destination data selection unit 1031 selects the stored data among the plurality of stored data stored in the buffer of the storage unit 102 . Stored data in which the sum of the size and the data size of the acquired data is smaller than a preset threshold data size (hereinafter referred to as the first threshold) is selected as data to be combined.

Here, the term "predetermined" includes not only the case of being always constant, but also the case of being uniquely determined according to conditions.
The “reference value” is not limited to numbers, and may be indicated by a plurality of levels such as a, b, and c, for example.
"Than" includes both including and not including the same value as the comparison.

On the other hand, when determining that the priority of the acquired data is lower than the predetermined reference value, the combination destination data selection unit 1031 selects the data size of the saved data among the plurality of saved data saved in the buffer of the saving unit 102 and the data size of the acquired data is a preset threshold data size, and is smaller than a threshold larger than the above-described first threshold (hereinafter referred to as a second threshold). Select as

The connection destination data selection unit 1031 further determines whether or not the selected connection destination data includes a data element having a priority higher than a predetermined reference value. If the selected combination destination data includes a data element with a high priority, the combination destination data selection unit 1031 further determines that the sum of the data size of the selected combination destination data and the data size of the acquired data is the first Determine if it is less than a threshold. Here, if it is determined that the sum of the data sizes is smaller than the first threshold, the combination destination data selection unit 1031 selects the selected combination data as the final combination destination data to be combined with the acquired data. to decide. On the other hand, if it is determined that the sum of the data size of the selected combined data and the data size of the acquired data is larger than the first threshold, the combined data selection unit 1031 selects the combination destination of the acquired data. It is determined that there is no such stored data.

When the combination destination data selection unit 1031 determines that the priority of the acquired data is higher than the predetermined reference value, the saved data whose sum of the data sizes is smaller than the first threshold is saved in the saving unit 102. and if it is determined that the priority of the acquired data is lower than the predetermined reference value, and if the saved data whose sum of data sizes is smaller than the second threshold is not saved, , the combination destination data selection unit 1031 determines that there is no saved data to be the combination destination of the acquired data.

The first threshold is set to, for example, the value of MTU (Maximum Transmission Unit). Stored data including data elements with high priority are combined with other data elements until the data size is smaller than the first threshold and transmitted. Since data with a data size larger than the MTU is fragmented during transmission, packet loss may occur on the transmission path. If packet loss occurs, all data will be retransmitted, which may lead to transmission delays. Therefore, by setting the data size of stored data including data elements with high priority to be smaller than the MTU, it is possible to prevent transmission delays from occurring in data elements with high priority.

On the other hand, the second threshold is set to an arbitrary value. The larger the value set for the second threshold, the more data can be transmitted collectively, so it is possible to suppress an increase in overhead and, in turn, a decrease in communication performance. However, the larger the value of the second threshold, the higher the possibility of packet loss of fragmented data, and the higher the possibility of transmission delay. Therefore, it is desirable to set the second threshold in consideration of the communication performance and the effect of packet loss.

Note that the first threshold and the second threshold are not limited to fixed values. For example, these thresholds may be values that dynamically change according to the processing load of the kernel and the load of the transmission path.

The combined data generating unit 1032 combines the combined data selected by the combined data selection unit 1031 and the obtained data to generate combined data. The generated combined data is saved as new saved data in the buffer in which the saved data selected as the connection destination data was saved.

Further, when the combination destination data selection unit 1031 determines that there is no stored data to be combined with the acquired data, the combined data generation unit 1032 stores the acquired data acquired by the acquisition unit 101 as stored data in the buffer. Note that when it is determined that there is no stored data to be combined with the acquired data, one stored data among the plurality of stored data stored in the storage unit 102 is transmitted from the transmission unit 104 . Therefore, the buffer serving as the storage destination of the acquired data is the buffer in which the storage data transmitted from the transmission unit 104 was stored.

The transmission data selection unit 1033 selects at least one of the plurality of stored data stored in the buffer of the storage unit 102 as transmission data to be transmitted by the transmission unit 104, which will be described later. Selection of storage data by transmission data selection section 1033 will be described later.

The transmission unit 104 “transmits” the stored data selected by the transmission data selection unit 1033 as transmission data. In this embodiment, it is assumed that the transmission unit 104 has a function of transmitting transmission data to the kernel of the communication control device 10 , that is, a function of transferring transmission data inside the communication control device 10 . However, the transmission unit 104 itself may function as a communication interface of the communication control device 10 and transmit transmission data as IP packets to other communication devices via a network.

Here, "transmitting" means not only transmitting data to another communication device via a network, but also transmitting data to a communication device having a function of transmitting data to another communication device. include.

(2) Selection of Combined Data by Combined Data Selection Unit 1031 The selection of saved data to be combined with acquired data by the combined data selection unit 1031 will be further described.

First, a case will be described where the acquisition unit 101 acquires a data element with a higher priority than a predetermined reference value while the storage unit 102 stores the stored data shown in FIG. In this case, the data size of the saved data in buffer #1 exceeds the first threshold, so naturally the sum of the data size of the saved data and the data size of the acquired data exceeds the first threshold. In addition, the sum of the data size of the saved data in the buffer #2 and the data size of the acquired data also exceeds the first threshold. On the other hand, the sum of the data size of the data stored in the buffer #3 or buffer #n and the data size of the acquired data does not exceed the first threshold. Therefore, the combination destination data selection unit 1032 selects the data stored in the buffer #3 or the buffer #n as the combination destination of the acquired data.

As shown in FIG. 2, when there is a plurality of stored data whose sum of data sizes does not exceed the first threshold, any method can be used to select one stored data from among the stored data as the destination data.

For example, the combination destination data selection unit 1031 selects, as the combination destination data, the stored data having the largest data size among the plurality of stored data whose sum of data sizes does not exceed the first threshold. In this case, in the example of FIG. 2, the combination destination data selection unit 1031 selects data stored in buffer #n. By selecting stored data having a large data size as a destination for combining acquired data, the data size of stored data becomes closer to the first threshold value or the second threshold value in descending order of the data size, and thus the data size becomes faster as transmission data. more likely to be sent to

In another example, the combination destination data selection unit 1031 selects stored data including a data element having the highest priority among a plurality of pieces of stored data whose sum of data sizes does not exceed the first threshold. may be selected as a destination. For example, when the priority is set based on the allowable delay time, it can be said that the shorter the time until the allowable delay time of data is reached, the higher the priority of transmitting the data. Therefore, by selecting stored data including data with such a priority as a destination for combining acquired data, the data size of stored data including data elements with a higher priority may be reduced to the first threshold value or the second threshold value in order. It is close to the threshold value, and thus the probability of early transmission as transmission data increases.

Next, a case will be described where the acquisition unit 101 acquires a data element with a lower priority than a predetermined reference value while the storage unit 102 stores the stored data shown in FIG. In this case, the sum of the data size of the saved data in buffer #1 and the data size of the acquired data exceeds the second threshold. On the other hand, the sum of the data size of the data stored in the buffer #2, #3 or #n and the data size of the acquired data does not exceed the second threshold. Therefore, the combination destination data selection unit 1032 selects the data stored in the buffer #2, #3, or #n as the combination destination of the acquired data. When there is a plurality of stored data whose sum of data sizes does not exceed the second threshold, the method of selecting one stored data from among the stored data is the same as in the case of the first threshold. Here, the data stored in buffer #2, which has the largest data size, is selected as the destination of the acquired data.

Next, the connection destination data selection unit 1031 determines whether or not the selected connection destination data includes a data element having a priority higher than a predetermined reference value. In the example of FIG. 2, the stored data in buffer #2 does not contain data elements with a priority higher than a predetermined reference value. Therefore, the combination destination data selection unit 1031 finally selects the data stored in the buffer #2 as the combination destination data of the acquired data.

FIG. 3 shows an example in which saved data saved in buffer #2 is different from that in FIG. In FIG. 3, the stored data in buffer #2 contains data elements having a priority higher than a predetermined reference value. In the case of the stored data in FIG. 3, the combination destination data selection unit 1031 determines whether the sum of the data size of the stored data in buffer #2 and the data size of the acquired data is smaller than the first threshold. In the example of FIG. 3, since the sum of the data sizes is larger than the first threshold, the combination destination data selection unit 1031 determines that there is no saved data to be the combination destination of the acquired data.
In the example of FIG. 3, if the sum of the data sizes is smaller than the first threshold, the combination destination data selection unit 1031 selects the stored data in the selected buffer #2 as the combination destination of the acquired data. decide.

(3) Selection of transmission data by transmission data selection section 1033 Next, selection of transmission data to be transmitted from transmission section 104 by transmission data selection section 1033 will be further described.

The transmission data selection unit 1033 selects, as transmission data, one stored data from among the plurality of stored data stored in the storage unit 102, for example, by the method exemplified below.
For example, transmission data selection section 1033 selects stored data having the largest data size as transmission data. This makes it possible to increase the size of data to be sent to the kernel and suppress overhead. Alternatively, stored data having the largest data size may be selected as transmission data from stored data including data elements having a priority higher than a predetermined reference value. In another example, stored data containing data elements with the highest priority may be selected as transmitted data.
However, the saved data that is selected when a specific condition is satisfied is not selected by the above-described method, and specific saved data is selected as transmission data.

Transmission data selection section 1033 selects transmission data when combination destination data selection section 1031 determines that there is no stored data to which acquired data is combined. Specifically, the timing at which transmission data selection section 1033 selects transmission data is the following timing.
(a) When the priority of acquired data is higher than a predetermined reference value and there is no saved data whose sum of data sizes is smaller than the first threshold (b) The priority of acquired data is higher than the predetermined reference value and the sum of the data sizes is less than the second threshold (c) the priority of the acquired data is lower than the predetermined reference value and the sum of the data sizes is less than the second threshold If the stored data smaller than 1033 selects the saved data selected by the combination destination data selection unit 1031 as transmission data. However, if the combination destination data selection unit 1031 selects the storage data only considering the data size, the transmission data selection unit 1033 may further consider the priority to reselect the storage data. .

Transmission data selection section 1033 may further select transmission data at the following timings in addition to the above timings (a) to (c).
(d) When the acquisition unit 101 does not acquire a new data element (e) When the storage unit 102 stores stored data including data that has reached the allowable delay time (f) The transmission unit 104 transmits immediately before When a predetermined time has passed since the data was transmitted Note that (e) is not limited to data that has reached the allowable delay time. It may be the case that the save data including the data element approaching the allowable delay time is saved. In the case of (e), transmission data selection section 1033 selects, as transmission data, stored data including data elements approaching the allowable delay time.

(4) Operation of Communication Control Device 10 Next, operation of the communication control device 10 of the present embodiment will be described with reference to FIG. The following operations not only show the data transmission control method in the communication control device 10 but also show the processing procedure of the data transmission control program executed by the communication control device 10 . These processes are not limited to the order shown in FIG. In other words, the order may be changed as long as there is no restriction such that a step uses the result of the preceding step.
As described above, the same applies not only to the present embodiment, but also to modifications of the present embodiment and other embodiments.

The acquisition unit 101 acquires new data elements transmitted from an application or another communication device as acquired data (S101).
The combination destination data selection unit 1031 determines whether or not the priority of transmitting the acquired data acquired in S101 is higher than a predetermined reference value (S102).
If the priority of the obtained data is higher than the predetermined reference value (S102: Yes), the destination data selection unit 1031 further determines the data size of the obtained data, the data size of the saved data saved in the saving unit 102, and the is smaller than the first threshold (S103).

If there is stored data with a sum of data sizes smaller than the first threshold (S103: Yes), the combination destination data selection unit 1031 selects stored data with a sum of data sizes smaller than the first threshold as the acquired data. It is selected as stored data to be combined (S104).
Then, the combined data generation unit 1032 generates combined data by combining the acquired data and the stored data selected by the combined data selection unit 1031, and stores the generated combined data in the storage unit 102 as stored data ( S105).

On the other hand, if there is no saved data whose sum of data sizes is smaller than the first threshold (S103: No), the connection destination data selection unit 1031 determines that there is no saved data to be the connection destination of the acquired data. Then, the transmission data selection unit 1033 selects one stored data from the stored data stored in the storage unit 102 as transmission data (S106).
The transmission unit 104 transmits the transmission data selected in S106 (S107).
Then, the combined data generation unit 1032 saves the obtained data as save data in the buffer in which the transmission data was saved (S108).

In S102, if the priority of the data is lower than the predetermined reference value (S102: No), the combination destination data selection unit 1031 determines the data size of the acquired data and the data size of the save data saved in the save unit 102. is smaller than the second threshold value (S109).
If there is stored data whose sum of data sizes is smaller than the second threshold (S109: Yes), the combination destination data selection unit 1031 selects stored data smaller than the second threshold as a storage to be combined with the acquired data. Select as data (S110).
Next, the combination destination data selection unit 1031 determines whether or not the saved data selected in S110 includes a data element having a priority higher than a predetermined reference value (S111).
If the result of determination in S111 is that a data element with a high priority is not included, the combined data generation unit 1032 combines the acquired data and the saved data selected by the combination destination data selection unit 1031 to generate combined data. Then, the generated combined data is stored as stored data in the storage unit 102 (S112).

If there is no stored data with a sum of data sizes smaller than the second threshold (S109: No), the combination destination data selection unit 1031 determines that there is no stored data to be the combination destination of the acquired data. In this case, the same processing as S106 to S108 described above is performed.

On the other hand, if the result of determination in S111 is that a data element with a high priority is included, the combination destination data selection unit 1031 further determines that the sum of the data size of the saved data selected in S110 and the data size of the acquired data is It is determined whether or not it is smaller than the first threshold (S113).
Here, if the data size and the sum are smaller than the first threshold, the processing of S112, that is, the acquired data and the selected saved data are combined to generate combined data, and the generated combined data is stored. It saves in the unit 102 (S112).
Further, when the sum of the data sizes is larger than the first threshold, the processing of S106 to S108 described above is performed. In this case, the transmission data selected in S106 is the saved data selected in S110.

(5) Summary As described above, according to the present embodiment, a data element with a high priority is combined with other data elements and transmitted so that the data size is smaller than the first threshold. As a result, overhead can be suppressed even when data elements with high priority are acquired with high frequency, and deterioration in communication performance can be suppressed. Furthermore, by setting the first threshold to the MTU, it is possible to prevent the occurrence of packet loss when transmitting data including data elements with high priority, and prevent transmission delays due to packet loss.

Furthermore, according to the present embodiment, a data element with a low priority can be combined with other data elements up to a data size larger than the first threshold, so overhead associated with data transmission processing can be suppressed. becomes possible.

2. Embodiment 2
In the first embodiment, the transmission unit 104 transmits the stored data stored in each buffer of the storage unit 102 as transmission data. In this embodiment, a configuration will be described in which new data is generated based on stored data stored in the storage unit 102, and the transmission unit 104 transmits the newly generated data as transmission data. This embodiment is applied when the priority of acquired data is higher than a predetermined reference value.

Since the configuration of the communication control device 10 of this embodiment is the same as that of the first embodiment except for the cases described below, the communication control device 10 of this embodiment will be described with reference to FIG.

The combined data generation unit 1032 of this embodiment newly generates saved data using a method described later. In this embodiment, the storage unit 102 preferably has an empty spare buffer in order to store the storage data newly generated by the combined data generation unit 1032 .

(1) Method 1
Method 1 in which the combined data generation unit 1032 generates new combined data will be described with reference to FIG.

In method 1, as in the first embodiment, the transmission data selection unit 1033 selects one piece of saved data from a plurality of pieces of saved data. FIG. 5a shows a state in which transmission data selection section 1033 selects data stored in buffer #1. When the transmission data selection unit 1033 selects the saved data saved in the buffer #1, the combined data generation unit 1032 selects the data size of part of the saved data saved in the buffer #1 and the data size of the acquired data. Part of the stored data (corresponding to "partial data") is extracted so that the sum of is smaller than the first threshold. Then, the combined data generation unit 1032 combines the extracted partial data of the stored data and the obtained data to generate new combined data. FIG. 5a shows combined data generated by combining partial data of stored data and acquired data. It is desirable that part of the saved data is extracted in order from the oldest data element in the saved data.

In FIG. 5b, the newly generated combined data is stored in the spare buffer, and the stored data in the buffer #1 is partially extracted from the stored data originally stored in the buffer #1. It shows the saved state.
“Immediately” when the combined data generation unit 1032 generates combined data and stores it in the spare buffer, the transmission unit 104 transmits the combined data stored in the spare buffer as transmission data.

Here, "immediately" includes the case where necessary preparations are made after the combined data is generated.

In the example of the first embodiment, when a data element with a high priority is acquired and there is no saved data to be combined with the data element, one saved data out of a plurality of saved data is transmitted, Acquired data was saved in an empty buffer. However, in this case, since the data element with the highest priority is positioned at the beginning of the stored data, it may take time for the stored data including the data element to be combined with other data elements and transmitted. There is

Therefore, according to method 1 of the present embodiment, when a data element with a high priority is acquired, part of the saved data already saved in the saving unit 102 is extracted, and the part of the extracted saved data and Newly acquired data is combined to generate new combined data, and by immediately transmitting the combined data, it is possible to transmit newly acquired high-priority data without delay.

(2) Method 2
Next, method 2 in which the combined data generation unit 1032 generates new combined data will be described with reference to FIG.
In method 2, as in method 1, transmission data selection section 1033 selects one stored data from a plurality of stored data. FIG. 6a shows a state in which transmission data selection section 1033 has selected storage data stored in buffer #1. When transmission data selection section 1033 selects data stored in buffer #1, combined data generation section 1032 selects data whose priority is higher than a predetermined reference value from data stored in buffer #1. Extract only high data elements (equivalent to "high priority data"). Then, the combined data generating unit 1032 generates combined data by combining the data size of the extracted high-priority data element and the acquired data. Note that when the saved data saved in the buffer #1 includes many data elements with high priority, the combined data generation unit 1032 sets the sum of the data size of the data elements and the data size of the acquired data to the first Extract the high priority data elements so that they are less than the threshold of .

FIG. 6b shows a state in which the newly generated combined data is stored in the spare buffer, and the data elements with higher priority are extracted from the stored data originally stored in buffer #1 in buffer #1. Indicates the state in which save data is saved.
“Immediately” when the combined data generator 1032 generates combined data and stores it in the spare buffer, the generator 104 transmits the combined data stored in the spare buffer as transmission data.

Note that in FIG. 6, the combined data generation unit 1032 extracts only high-priority data elements contained in one buffer (buffer #1) to generate new combined data. However, the combined data generation unit 1032 may extract data elements with high priority from a plurality of stored data to generate new combined data.

As in method 1, in method 2, when data having a high priority is acquired, new combined data including the data is generated, and the combined data is immediately transmitted so that the newly acquired priority data can be transmitted without delay.

3. Generalization The features of the communication control device and the like in each embodiment of the present invention have been described above.

Since the terms used in each embodiment are examples, they may be replaced with synonymous terms or terms including synonymous functions.

The block diagrams used in the description of the embodiments are obtained by classifying and arranging the configuration of the device for each function. Blocks representing respective functions are realized by any combination of hardware or software. Moreover, since the block diagram shows the function, it can also be understood as disclosure of the invention of the method and the invention of the program for realizing the method.

Regarding the functional blocks that can be grasped as the processing, flow, and method described in each embodiment, the order is changed unless there is a restriction such that one step uses the result of another step that precedes it. good too.

The terms 1st, 2nd, and Nth (N is an integer) used in each embodiment and claims are used to distinguish between two or more configurations and methods of the same type. , does not limit the order or superiority.

Further, examples of the form of the communication control device of the present invention include the following.
Forms of parts include semiconductor elements, electronic circuits, modules, and microcomputers.
Semi-finished products include an electronic control unit (ECU (Electric Control Unit)) and a system board.
Finished product forms include mobile phones, smart phones, tablets, personal computers (PCs), workstations, and servers.
Other devices include devices having communication functions, such as video cameras, still cameras, and car navigation systems.

Moreover, necessary functions such as an antenna and a communication interface may be added to the communication control device.

In addition, the present invention can be realized not only by dedicated hardware having the configuration and functions described in each embodiment, but also by a program for realizing the present invention recorded in a recording medium such as a storage unit or a hard disk, and this can also be realized as a combination with general-purpose hardware having a dedicated or general-purpose CPU and a storage unit, etc., capable of executing

A program stored in a non-transitional material recording medium of dedicated or general-purpose hardware (for example, an external storage device (hard disk, USB storage unit, CD/BD, etc.), or an internal storage device (RAM, ROM, etc.)) , via a recording medium, or via a communication line from a server without a recording medium, to dedicated or general-purpose hardware. This allows us to always provide the latest features through program upgrades.

The present invention is directed to a communication control device for performing communication control of a general-purpose communication device.

10 communication control device, 101 data acquisition unit, 102 storage unit, 1031 combination destination data selection unit, 1032 combination data generation unit, transmission unit 104

Claims (11)

a storage unit (102) storing a plurality of first data including one or more data elements;
an acquisition unit (101) for acquiring a new data element as second data;
When the priority of transmitting the second data is higher than a predetermined reference value, among the plurality of first data, the first data size of the first data and the second data size of the second data selects the first data whose sum with the data size of is smaller than the first threshold as the data to be combined,
when the priority is lower than the predetermined reference value, the sum of the first data size and the second data size among the plurality of first data is larger than the first threshold selecting the first data that is smaller than the second threshold, which is the threshold, as the binding destination data;
a selection unit (1031);
a combined data generation unit (1032) that combines the combination destination data and the second data to generate combined data and stores the combined data in the storage unit as first data;
a transmitter (104) configured to transmit at least one of the plurality of first data as transmission data;
A communication control device (10) comprising: When the priority is lower than the predetermined reference value, and the data element to be bound includes the data element having a priority higher than the predetermined reference value, the selection unit further determining whether the sum of the first data size and the second data size is smaller than the first threshold;
if the sum is smaller than the first threshold, the combined data generation unit combines the combination destination data and the second data to generate the combined data;
If the sum is greater than the first threshold, the transmission unit transmits the combination destination data as the transmission data.
2. The communication control device according to claim 1. If there is no first data in which the priority is higher than the predetermined reference value and the sum is smaller than the first threshold,
The transmission unit transmits one of the plurality of first data as the transmission data,
The combined data generation unit stores the second data as first data in the storage unit.
The communication control device according to claim 1. If there is no first data in which the priority is lower than the predetermined reference value and the sum is smaller than the second threshold,
The transmission unit transmits one of the plurality of first data as the transmission data,
The combined data generation unit stores the second data as first data in the storage unit.
2. The communication control device according to claim 1. wherein the transmission unit transmits, as the transmission data, first data having the largest first data size among the plurality of first data;
5. The communication control device according to claim 3 or 4. wherein the transmission unit transmits, as the transmission data, the first data further including a data element having a priority higher than the predetermined reference value among the plurality of first data;
6. The communication control device according to claim 5. If there is no first data in which the priority is higher than the predetermined reference value and the sum is smaller than the first threshold,
The combined data generation unit extracts partial data, which is the partial data in which the sum of the data size of the portion of the first data and the second data size is smaller than the first threshold, and combining the data and the second data to generate combined data;
The transmission unit transmits the combined data as the transmission data immediately after the combined data is generated.
2. The communication control device according to claim 1. If there is no first data in which the priority is higher than the predetermined reference value and the sum is smaller than the first threshold,
The combined data generation unit generates a data size of high-priority data, which is the data element having a higher priority than the predetermined reference value among the data elements included in the first data, and the second data size. extracting the high-priority data whose sum is smaller than the first threshold, and combining the high-priority data and the second data to generate combined data;
The transmission unit transmits the combined data as the transmission data immediately after the combined data is generated.
2. The communication control device according to claim 1. The first threshold is MTU (Maximum Transmission Unit),
2. The communication control device according to claim 1. A communication control method executed by a communication control device comprising a storage unit storing a plurality of first data including one or more data elements,
acquire the second data as a new data element (S101);
When the priority of transmitting the second data is higher than a predetermined reference value, among the plurality of first data, the first data size of the first data and the second data size of the second data is smaller than the first threshold as data to be combined (S102, S103, S104),
when the priority is lower than the predetermined reference value, the sum of the first data size and the second data size among the plurality of first data is larger than the first threshold selecting the first data smaller than the second threshold as the data to be combined (S102, S109, S110);
combining the data to be combined with the second data to generate combined data, storing the combined data as first data in the storage unit (S105, S112);
transmitting at least one of the plurality of first data as transmission data (S107);
Communication control method. A communication control program executable by a communication control device comprising a storage unit storing a plurality of first data including one or more data elements,
acquire the second data as a new data element (S101);
When the priority of transmitting the second data is higher than a predetermined reference value, among the plurality of first data, the first data size of the first data and the second data size of the second data is smaller than the first threshold as data to be combined (S102, S103, S104),
when the priority is lower than the predetermined reference value, the sum of the first data size and the second data size among the plurality of first data is larger than the first threshold selecting the first data smaller than the second threshold as the data to be combined (S102, S109, S110);
combining the data to be combined with the second data to generate combined data, storing the combined data as first data in the storage unit (S105, S112);
transmitting at least one of the plurality of first data as transmission data (S107);
Communication control program.

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