JP3377420B2 - Communication processing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication processing device using a personal handyphone system internet access forum standard as a communication protocol.

[0002]

2. Description of the Related Art In recent years, a personal handyphone system (hereinafter, abbreviated as PHS terminal) has been used as a communication protocol of a data communication device for transmitting and receiving target data to be transmitted and received among a plurality of data terminal devices. Handyphone System Internet Access Forum Standard (PHS Internet Access ForumSta
ndard; hereinafter referred to as PIAFS) is used.

FIG. 5 is a block diagram showing an electrical configuration of a conventional data communication apparatus 1 using PIAFS.
The data communication device 1 is configured by interposing a communication processing device 5, which is a data communication module, between the PHS terminal 3 and the data terminal device 4. In order to send and receive target data with this data communication device, first, the communication control device 7 is based on the initial values of the communication parameters output from the communication parameter initial value setting device 8 and with the data conversion device 9 and PHS.
Using the terminal 3, the communication parameters are negotiated with the data communication device on the other side. The communication parameter determined by the negotiation is stored in the memory device 13 of the data conversion device 9.

When transmitting the target data, the communication control device 7 is then constituted by the PIAFS framing device 11 based on the PIAFS data frame format, and the target data output from the data terminal device 4 is composed of a plurality of data frames. Convert to a data signal. The data frame defined by the PIAFS standard includes a sequence number as one of the control signals. The sequence number is an integer. It starts from 1 and sequentially increases in the order of transmission of data frames. When the sequence number increases up to the maximum frame number, which is a value determined by the negotiation of communication parameters, the sequence number returns to 1 again, and again. To increase. Then, the communication control device 7 causes the PHS terminal 3 to sequentially transmit the data frames of this data signal. At the same time, the transmitted data frame is stored in the memory device 1.
The data is stored in the transmission buffer device 15 which is an area set in the area 3.

Further, when receiving the target data, the communication control device 7 performs, after the negotiation of the communication parameters,
The PHS terminal 3 is made to receive the data frame transmitted by the data communication device on the other side. The received data frame is
It is stored in the reception buffer device 16 at a predetermined address based on the sequence number in the data frame.
The reception buffer device 16 is an area set in the memory device 13. When a plurality of data frames with consecutive sequence numbers are stored in the reception buffer device 16, the communication control device 7 outputs the data frames in the reception buffer device 7 to the PIAFS deframing device 12 in the order of the sequence numbers. The PIAFS deframing device 12 extracts target data from a plurality of data frames and gives the extracted target data to the data terminal device 4.

The transmission buffer device 15 manages the stored data frame based on the sequence number of the data frame. This is because the PIAFS uses an ARQ (Automatic ReQuest for reseption) method as an error correction method, and therefore it is necessary to save the data frame until the delivery of each data frame is confirmed by the data communication device on the other side. Because there is. In addition, the reception buffer device 14 also stores the stored data frame
Manage based on sequence number. This is for the following reason. In order to extract target data from a plurality of data frames without error, it is necessary to process the data frames in the order of the sequence numbers. In PIAFS, the error correction method is the ARQ method. Therefore, the data frames received without error are arranged in the order of reception. May not be arranged in the order of sequence numbers. This is because when a transmission error such as signal interference or deterioration occurs between the PHS terminal 3 and the PHS terminal of the data communication device on the other side, the data frame is dropped and the data frame is retransmitted due to the transmission error. This is to do it. Therefore, in order to provide the data frames to the PIAFS deframing device 12 in the order of the sequence numbers, it is necessary to manage the received data frames based on the sequence numbers. Based on the above reason, the data communication device 1 needs to include the transmission and reception buffer devices 15 and 16 capable of storing at least the same number of data frames as the maximum frame number.

When PIAFS is used, the data communication apparatus on the transmission side sends a backward from the data communication apparatus on the reception side, that is, the presence / absence of a data frame to be retransmitted and a request to retransmit the data frame, until the sequence number makes one cycle. Data frames can be transmitted continuously without waiting. Therefore, the larger the maximum frame number, the larger the number of data frames that can be transmitted without waiting for the backward. Therefore, the efficiency of transmitting the target data increases as the maximum frame number increases, and is less susceptible to the influence of transmission errors. Therefore, it is preferable that the maximum frame number be as large as possible in order to improve the throughput when a transmission error occurs in the wireless section in the data communication line established by using the PHS terminal 3. However, since the maximum frame number is the number of data frames that can be stored in the transmission and reception buffer devices 15 and 16, the maximum frame number is limited by the capacity of the memory device 13 installed in the communication processing device 5, and is not necessarily PI.
It is not always possible to set the upper limit value set in the AFS. Therefore, the initial value of the maximum frame number output by the communication parameter initial value setting device 8 needs to be determined according to the capacity of the mounted memory device 13.

Therefore, the prior art communication processor 5
When the capacity of the memory device 13 mounted therein is changed, it is necessary to match the initial value of the maximum frame number with the capacity, so that it is necessary to change the design of the communication processing device 5. This design change is, for example, a software revision when the communication parameter initial value setting device 8 is realized by software, and the communication parameter initial value setting device is a nonvolatile memory such as an E ² PROM. When realized by storing the initial value in the memory, the setting of the data stored in the nonvolatile memory is changed. For this reason, in the factory that manufactures the communication processing device 5, it is necessary to change the design of the communication processing device 5 every time when the capacity of the memory device to be mounted is changed. As more work was needed, the work in the factory was increasing. Therefore, the memory device 13
There is a case where the productivity and reliability of the communication processing device 5 are lowered due to the design change and the increase of the work only by changing the capacity of the communication processing device 5.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to improve productivity and reliability by eliminating the work of modifying software and modifying data settings even when the capacity of a memory device to be mounted is changed. It is to provide a communication processing device capable of performing.

[0010]

According to the present invention, there is provided data signal storage means for storing a data signal to be transmitted and received between a controlled communication device and a partner communication device, and data stored in the data signal storage device. A communication processing device comprising: a communication control unit that gives a signal to a communication device for transmission / reception, or stores a data signal received by the communication device in a data signal storage unit, and a storage unit that internally includes the data signal storage unit; A capacity detection means for detecting the capacity of the storage means, and a control for setting a control signal for controlling the operation of the data signal storage means of the partner communication device or the communication device to be controlled based on the detected capacity. And a signal setting unit.

According to the present invention, as described above, the communication processing device is provided with the storage means including the data signal storage means therein, the capacity of the storage means is automatically detected, and based on the detected capacity. Generate a control signal. Thereby, the control signal relating to the data signal storage means can be automatically set. For example, in the case where a communication protocol in which a capacity of an area used as a data signal storage means in a memory device mounted in a communication processing device for use as a storage means is determined by a control signal is used, based on the total capacity of the memory device. It is possible to automatically determine the capacity of the data storage means. Therefore, even if the capacity of the memory device mounted on the communication processing device is changed, there is no need to make design changes regarding the control signal that changes according to the capacity of the memory device of the communication processing device. Therefore, the productivity and reliability of the communication processing device can be improved as compared with the conventional communication processing device.

The present invention is based on the Personal Handyphone System Internet Access Forum Standard and provides a plurality of data frames between a communication device to be controlled and a partner communication device which are personal handyphone systems. In order to transmit and receive a data signal composed of the following, a transmission buffer unit that stores a data frame to be transmitted by the communication device to be controlled and a reception buffer unit that stores the data frame received by the communication device to be controlled are internally set. And a communication control means for giving the data frame stored in the transmission buffer unit to the communication device to be controlled to be transmitted, and for storing the data frame received by the communication device to be controlled in the reception buffer unit. In a communication processing device including a capacity detection device for detecting the capacity of the storage means. And a maximum frame number determining means for determining an initial value of the maximum frame number for determining the capacity of the transmission and reception buffer sections based on the detected capacity of the storage means, and the communication control means includes the data frame Prior to transmitting / receiving, the control target communication device is caused to transmit the initial value of the maximum frame number determined by the maximum frame number determining means, and the transmission / reception buffer unit is set based on the initial value of the maximum frame number transmitted / received. A communication processing device characterized by being set in a storage means.

According to the present invention, the communication processing device that uses the PHS terminal as the communication device and uses PIAFS as the communication protocol, as described above, uses the initial value of the maximum frame number, which is one of the communication parameters of PIAFS, as follows: It can be automatically determined based on the capacity of the storage means. Therefore, even if the capacity of the memory device mounted in the communication processing device for use as a storage unit is changed, it is not necessary to change the design of the communication processing device. Therefore, the productivity and reliability of the communication processing device can be improved as compared with the communication processing device using the conventional PIAFS.

In the present invention, the maximum frame number determining means sets a predetermined first capacity used for storing data other than the data frame from the capacity of the storage means detected by the capacity detecting means. It is characterized in that a half of a quotient obtained by dividing the subtracted difference by a predetermined second capacity for storing a single data frame is determined as the initial value of the maximum frame number.

According to the present invention, the maximum frame number determining means determines the initial value of the maximum frame number by the above method. With this, even when the storage means needs to have an area for storing the other data, which is, for example, a communication parameter, in addition to the area used as the transmission and reception buffers, the initial value is automatically determined. You can Also, regardless of the capacity of the storage means, the value when the transmission and reception buffer units are set in the entire remaining area excluding the area for storing the other data in the storage means is always set as the initial value. can do. Therefore, the initial value can be the maximum value that can be realized by this storage means.

According to the present invention, the maximum frame number determination means sets a predetermined first capacity used for storing data other than the data frame from the capacity of the storage means detected by the capacity detection means. The half of the quotient obtained by dividing the subtracted difference by the predetermined second capacity for storing a single data frame is compared with a predetermined upper limit of the maximum frame number, and the half of the quotient is When the upper limit is exceeded, the initial value is set to the upper limit, and when the half of the quotient is less than or equal to the upper limit, the initial value is set to the half of the quotient.

According to the present invention, the maximum frame number determining means determines the initial value of the maximum frame number by the method described above. With this, even when the storage means needs to have an area for storing the other data in addition to the area used as the transmission and reception buffers, the initial value of the maximum frame number can be automatically determined. . Further, a half value of the quotient is obtained as an initial value candidate value, and the candidate value is compared with an upper limit value defined by PIAFS,
Since the initial value is determined based on the comparison result, the initial value can always be set to the upper limit value of the maximum frame number or less. As a result, the capacity of the memory implemented as the storage unit can be selected without being restricted by the upper limit value.

According to the present invention, the capacity detecting means stores predetermined inspection data in a plurality of addresses expected to be preset in the storage means, reads the data stored in each address, and For each address, the data read from the address is compared with the inspection data stored at the address, and the capacity of the storage means is obtained based on the address at which the read data and the inspection data match. And

According to the present invention, the capacity detecting means detects the capacity of the storage means by the method described above. As a result, the capacity of the storage means can be automatically detected.

[0020]

1 is a block diagram showing an electrical configuration of a data communication device 21 including a communication processing device 25 according to an embodiment of the present invention. Data communication device 21
Is a PHS terminal 23 and a data terminal device (Data Terminal).
An equipment (DTE) 24 and a communication processing device 25 are interposed therebetween. The data communication device 21 uses PIAFS as a communication protocol, and transmits and receives digital signals to and from the data communication device on the other side. The digital signal to be transmitted / received is hereinafter referred to as target data. PIAFS is PH
PHS is a communication protocol for data communication using S.
Specified by the Internet Access Forum. In PIAFS, the target data is converted into a data signal which is a digital signal composed of a plurality of data frames, and the PHS terminal 23 is made to send and receive the data signal instead of sound.

The PHS terminal 23 is a communication device, and a data communication line via a PHS telephone network with the PHS terminal 23 and the PHS terminal of the partner's data communication device at both ends between the PHS terminal 23 and the partner's data communication device. Establish. This data communication line includes, for example, a wireless section between a PHS terminal and a PHS base station. The PHS terminal 23 is not limited to one used as a telephone alone, but may be a PHS terminal.
It may be a telephone corresponding to. Examples of the telephone include a PHS-compatible home digital cordless telephone. The data terminal device 24 is realized by, for example, a personal computer and a personal digital assistant,
Output and input the target data.

The communication processing device 25 is a so-called data communication module, for example, a PC (Parsonal Compute).
r) Realized by card. For example, the PC card and the PHS terminal 23 are connected via a cable and a connector, and the PC card and the data terminal device 24 are connected via a connector. The communication processing device 25 includes a memory capacity detection device 31, a maximum frame number determination device 32, a communication parameter initial value setting device 33, a communication control device 34, and a data conversion device 35. Data converter 35
Includes a PIAFS framing device 37, a PIAFS deframing device 38, and a memory device 39.

The memory capacity detection device 31 is the memory device 3
The capacity of 9 is detected. Maximum frame number determination device 32
Is the memory device 39 detected by the memory capacity detection device 31.
The initial value of the maximum frame number, which is one of the communication parameters of PIAFS, is determined based on the capacity of The communication parameter initial value setting device 33 stores initial values of various communication parameters which are control variables necessary for data communication using PIAFS, and gives the initial values to the communication control device 34. These initial values are set for each communication processing device based on the configuration of the data communication device,
The initial value of the maximum frame number among them is the value determined by the maximum frame number determination device 32. The communication control device 34 uses the communication parameter initial value setting device 33.
Based on the initial values of the communication parameters given from the above, the communication parameters are negotiated with the partner data communication device, and the communication control of the entire data communication device 21 is performed while the target data is transmitted and received.

The memory capacity detection device 31, the maximum frame number determination device 32, the communication parameter initial value setting device 33, and the communication control device 34 are, for example, the central processing unit 3.
It is realized by the arithmetic operation of 5. In this case, each block in FIG. 1 represents a processing routine for causing the central processing unit to perform the operation of each of the devices 31 to 34 in the program executed by the central processing unit, and the arrow indicates the processing of each processing routine. This means transmitting the result to the next processing routine.
Further, the communication parameter setting device 33 may be realized by storing initial values of various communication parameters in a nonvolatile memory in which data can be written and erased. An example of this non-volatile memory is an E ² PROM.

The memory device 39 is a memory capable of reading and writing data, and is realized by a random access memory, for example. In the memory area of the memory device 39,
Two areas having a capacity capable of storing the same number of data frames as the maximum frame number determined by the negotiation of the communication parameters are the transmission and reception buffer device 4
It is set as 1,42. The transmission buffer device 41 is
This is for saving the data frame transmitted by the PHS terminal 23 from the time of transmission to the time of confirmation of delivery of the data frame from the data communication device on the partner side. The reception buffer device 42 is for temporarily storing the data frame received by the PHS terminal 23 until a plurality of data frames including the data frame and having consecutive internal sequence numbers are obtained. In each of the transmission and reception buffer devices 41 and 42, the communication control device 34 stores, in the memory device 39, the same number of data as the maximum frame number determined by the negotiation each time the communication parameters are negotiated. This is realized by securing an area for the capacity of storing a frame.

When the data communication device 21 transmits the target data to the data communication device on the other side, after the end of the negotiation of the communication parameters, the communication control device 34 makes the PIAF.
The S framing device 37 is caused to convert the target data output from the data terminal device 24 into a data signal composed of a plurality of data frames. This conversion process is performed by PIA
The process is performed based on the data frame format defined by the FS, and is roughly a process of dividing the target data given from the data terminal device 24 into a plurality of parts and further adding a control signal to each part. Further, the communication control device 34 changes the data frame of this data signal to PH
The S terminal 23 is made to sequentially transmit to the partner's data communication device via the data communication line.

The control signal of the data frame includes a sequence number indicating the transmission order of the data frame. The sequence number starts from 1 and sequentially increases in the order of transmission of data frames. When the sequence number increases to the maximum frame number determined by the negotiation of communication parameters, it returns to 1 again, and the cycle from 1 to the maximum frame number is repeated. Repeat. The transmitted data frame is stored in the transmission buffer device 41 and managed by its sequence number so as to be stored from the time of transmission until the delivery of the data frame is confirmed by the data communication device on the partner side. It

When the data communication device 21 receives the data signal transmitted from the partner data communication device, the communication control device 34 is operated after the negotiation of the communication parameters is completed.
Stores the data frame received by the PHS terminal 23 in the reception buffer device 42 based on the sequence number. For example, the address in the reception buffer device 42 is associated with each sequence number in advance, and each data frame is stored at the address corresponding to the sequence number. When a plurality of data frames having consecutive sequence numbers are stored in the reception buffer device 42, the communication control device 34 causes the PIAFS deframing device 38 to
Target data is extracted from a plurality of data frames having consecutive sequence numbers. This extraction processing is performed based on the PIAFS standard. Generally, the control signal is removed from a plurality of data frames stored in the reception buffer device 42 and having consecutive sequence numbers, and the remaining portion is sequenced. This is a process of arranging the data frames, which can be known from the numbers, in the order of transmission. The extracted target data is given to the data terminal device 24.

Further, in the memory device 39, an area used for other purposes than the transmission and reception buffer devices 41 and 42 is secured. Areas used for other purposes include, for example, an area for storing communication parameters defined by the negotiation of communication parameters, an area used as a buffer when the PIAFS framing device and the PIAFS deframing device perform processing, and a central area. An area used as a buffer when the arithmetic processing unit performs processing can be mentioned. The memory device 39 is externally attached to the other devices 31 to 34, 37, 38, and the communication processing device 25
In order to change the capacity of the memory device 39, it is possible to replace only the memory device 39 with another capacity without replacing the other devices 31 to 34, 37 and 38.

A method of setting the initial value of the maximum frame number using the memory capacity detection device 31 and the maximum frame number determination device 32 will be described using the following first and second examples.

In the first example, it is assumed that a memory having a capacity of 16 Kbytes (16384 bytes) is mounted in the communication processing device 25 as the memory device 39. When power is supplied to each of the devices 31 to 34, 37 to 39 in the communication processing device 25, the memory capacity detection device 31 first causes the capacity Ra of the memory device 39 currently attached to the communication processing device 25.
To detect. The detected capacity Ra of the memory device 39 is
The maximum frame number determination device 32 is provided. In this example, it is assumed that the detected capacity Ra is 16 Kbytes (16384 bytes).

The basic method of detecting the capacitance is, for example, as follows. First, a predetermined value is sequentially written as inspection data for a predetermined part of the predetermined addresses that are expected to be present in the memory device 39 or for all the addresses that are expected to be present. Next, the data written therein is read from the address in which the inspection data was written, the inspection data written in that address is compared with the read data, and if they match, the address is It is determined that the data can be written correctly, and if they do not match, it is determined that the data cannot be written correctly. Finally, the capacity Ra of the memory device 39 is calculated, for example, by using the number of addresses at which the value can be correctly written or the numerical value indicating the address, based on the determination result of whether the value writing is correct or not. A method other than this description may be used as the capacity detection method.

The maximum frame number determining device 32 first
A transmission and reception buffer device 41 in the memory device 39,
As the capacity Rb of the area usable as 42, a difference obtained by subtracting a predetermined first capacity RC1 from the detected capacity Ra of the memory device 39 is obtained. The first capacity RC1 is the capacity of the area used for the above-mentioned other uses other than the transmission and reception buffer devices 41 and 42, and is stored in the maximum frame number determination device 32, for example. In the first example, the first capacity RC1 is 5 Kbytes (5120 bytes).
Suppose that Therefore, the capacity Rb of the usable area is 11 Kbytes (11264) as expressed by the following equation.
Byte).

[0034]       Rb = Ra-RC1            = 16 Kbytes-5 Kbytes = 11 Kbytes (1)

Next, the maximum frame number determining device 32 determines the capacity Rb of the usable area as a single data as the number N1 of data frames that can be stored in the areas usable as the transmission and reception buffer devices 41 and 42. Find the quotient divided by the second capacity RC2 required to store the frame. In the first example, the PIAFS data frame format requires 80 bytes per single data frame, so the second capacity RC2 is assumed to be 80 bytes. Further, the maximum frame number determination device 32 divides the number N1 of storable data frames by the number NC of areas that need to be set in the communication processing device 25 as the initial value candidate value N2 of the maximum frame number. Seek a quotient.
According to the PIAFS standard, the transmission and reception buffer devices 41 and 42 are set in a single data communication device 21, so that an area for storing the same number of data frames as the maximum frame number is stored in the memory device 39. Since it is necessary to set two, in the first example, it is assumed that the number NC of the necessary areas is two. That is, the transmission and reception buffer devices 41 and 42 for one sequence number
Therefore, the number N1 of storable data frames is divided by 2. Second capacity RC
2 and the number NC of the necessary areas are predetermined based on PIAFS and are stored in the maximum frame number determination device 32, for example. Therefore, the candidate value N2 of the initial value of the maximum frame number becomes 70 as expressed by the following equation. In the following formula, the fractional part is rounded down to the PIAF
This is because in the S standard, the maximum frame number is an integer, and the fractional part after the decimal point, that is, the remainder indicates that only a part of a single data frame can be stored.

[0036]       N2 = Rb / RC2 / NC = N1 / NC            = 11264 bytes ÷ 80 bytes ÷ 2 = 70.4 ≈ 70 (2)

Further, the maximum frame number determination device 32 is
The initial value candidate value N2 of the maximum frame number is compared with the upper limit value of the maximum frame number. In the PIAFS standard, the upper limit value and the lower limit value of the maximum frame number are predetermined, and for example, the upper limit value is 63 and the lower limit value is 16. When the candidate value N2 exceeds the upper limit value, the maximum frame number determination device 32 determines that the initial value of the maximum frame number is the same value as the upper limit value. When the candidate value N2 is less than or equal to the upper limit value and greater than or equal to the lower limit value, the maximum frame number determination device 3
2 determines that the initial value of the maximum frame number is the candidate value N2. The determined initial value of the maximum frame number is given to the communication parameter initial value setting device 33. Through the above processing, the initial value of the maximum frame number is determined. The communication parameter initial value setting device 33 holds the determined initial value while the power is continuously supplied. When data communication is performed after the initial value is determined, the communication parameter is negotiated using the determined initial value of the maximum frame number.

Next, in the second example, it is assumed that a memory having a capacity of 8 Kbytes is mounted as the memory device 39 in the communication processing device 25 in place of the memory having a capacity of 16 Kbytes. In this case, the communication processing device 25 does not replace the first communication processing device 25 except for the memory. Therefore, the behaviors of the memory capacity detection device 31 and the maximum frame number determination device 32 are the same as the first example except that the capacity of the target memory device is changed, and detailed description thereof will be omitted.

Each of the devices 31 to 34 in the communication processing device 25
When power is supplied to 37 to 39, the memory capacity detection device 31 first detects the capacity Ra of the memory device 39 currently attached to the communication processing device 25 and supplies it to the maximum frame number determination device 32. It is assumed that the detected capacity Ra is 8 Kbytes (8192 bytes). The maximum frame number determination device 32 determines the detected capacity Ra of the memory device 39.
The first capacity RC1 is subtracted from the area to obtain the capacity R of the area usable as the transmission and reception buffer devices 41 and 42.
Find b. It can be seen from the following equation that the usable area capacity Rb is 3 Kbytes (3072 bytes).

[0040]       Rb = Ra-RC1            = 8K bytes-5K bytes = 3K bytes (3)

Further, the maximum frame number detecting device 32 is
The capacity Rb of the area usable as the transmission and reception buffer devices 41 and 42 is divided by the second capacity RC2,
The number N of data frames that can be stored in the usable area
Ask for 1. Further, the number N1 of the data frames is divided by the number NC of the necessary areas to obtain a candidate value N2 of the initial value of the maximum data frame.

[0042]       N2 = Rb / RC2 / NC = N1 / NC            = 3072 bytes ÷ 80 bytes ÷ 2 = 19.2 ≒ 19… (4)

As a result, the candidate value N2 of the initial value of the maximum frame number becomes 19. When this candidate value N2 is compared with the upper limit value of the maximum frame number, the candidate value is less than or equal to the upper limit value. The candidate value N2 is 16 or more, which is the lower limit value of the maximum frame number. Therefore, the initial value of the maximum frame number is determined to be the candidate value N2, ie 19,
Candidate value N2 is given to communication parameter initial value setting device 33 and stored. In the subsequent data communication, this value is used as the initial value of the maximum frame number.

In the above description, the determination of the initial value of the maximum frame number is performed immediately after the power supply to the communication processing device 25 is started, because the initial setting of the device is generally performed immediately after the power supply is started. This is because other initial settings and the initial value of the maximum frame number are determined at the same time. The determination of the initial value is not limited to immediately after the start of power supply, and may be performed at any time before the start of data communication.

As described above, by determining the initial value of the maximum frame number by using the memory capacity detecting device 31 and the maximum frame number determining device 32, the initial value of the maximum frame number is fixed at the design stage of the communication processing device. It is not necessary to store the value in the communication parameter initial value setting device 33. In the case of the communication processing device 5 of the related art, since the communication parameter initial value setting device 8 also stores the initial value of the maximum frame number as a fixed value, the communication parameter initial value is set when the capacity of the memory device 13 is changed. It was necessary to change the design of the value setting device 8. Even if the capacity of the memory device 39 is changed, the communication device 25 of the present embodiment automatically determines the initial value of the maximum frame number based on the changed memory capacity, as shown in the second example. Therefore, there is no need to change the design of devices other than the memory device of the communication processing device 25. Therefore, this communication processing device 25
When the memory device to be mounted is changed, the productivity and reliability will not be reduced due to the design change. Therefore, it is possible to improve productivity and reliability as compared with the communication processing device of the related art.

Further, by obtaining the candidate value of the initial value of the maximum frame number by the above-mentioned method, the areas used for the other uses besides the areas used as the transmission and reception buffer devices 41 and 42 by the memory device 39 are determined. Even when it is necessary to provide, the optimum value according to the capacity of the memory device 39,
It can be automatically determined as the initial value of the maximum frame number. Furthermore, the maximum frame number determination device 32
Is the initial value candidate value N, which is the value when the transmission and reception buffer devices 41 and 42 are set using the entire remaining area excluding the area used for the other purpose in the memory device 39.
It can always be set as 2. Therefore, since this initial value can be set to the maximum number of data frames that can be stored in the transmission and reception buffer devices 41 and 42 that can be set in the memory device 39, the initial value of the maximum frame number can be set in the memory device 39. It can be increased as much as possible within the range limited by the capacity, that is, within the number N1 of storable data frames and above the lower limit of the maximum frame number.

Furthermore, since the initial value is determined by comparing the candidate value N2 of the initial value of the maximum frame number with the upper limit value of the maximum frame number, the initial value of the maximum frame number is irrespective of the capacity of the memory device 39. Can always be set below the upper limit of the maximum frame number. Therefore, the capacity of the memory mounted as the memory device 39 can be selected without being restricted by the upper limit value. When the candidate value N2 is less than the lower limit value, data communication using PIAFS becomes difficult, but a memory having a capacity in which the candidate value N2 is less than the lower limit value is used as the memory device 3 at the design stage of the communication processing device 25.
Since it is considered that the candidate value N2 is excluded from those used as 9, the candidate value N2 is always greater than or equal to the lower limit value, and it is considered unnecessary to determine whether or not the candidate value N2 is less than the lower limit value. That is, in the memory mounted as the memory device 39, when the candidate value N2 of the initial value of the maximum frame number is calculated using the capacity using the above-described method, the candidate value N2 becomes equal to or larger than the lower limit value of the maximum frame number. If Therefore, the capacity of the memory mounted as the memory device 39 is not restricted by the upper limit value of the maximum frame number but restricted only by the lower limit value of the maximum frame number, so that the selection range of the mounted memory can be widened. .

FIG. 2 is a sequence diagram schematically showing a sequence executed at the start of data communication. The behavior of the data communication device 21 during data communication will be schematically described with reference to FIG. In this description, it is assumed that the data communication device on the other side also has the configuration shown in FIG. 1, and the same device is denoted by the same reference numeral.

First, the PHS terminal 23 is connected to the communication control unit 34.
In response to the control of the other side, or P of the data communication device of the other side.
In response to a signal from the HS terminal 23, the same operation as when making and receiving a call when used as a telephone is performed, and a wireless link is established with the PHS terminal 23 of the data communication device on the partner side. That is, a data communication line is established through the PHS telephone network with the PHS terminal 23 and the PHS terminal 23 of the partner's data communication device at both ends.

Next, the communication control unit 34 first determines the PIAF.
In order to synchronize the S frame, the synchronization sequence is executed. Specifically, the synchronization sequence is as follows. First, the communication control device 34 of one of the two data communication devices transmits a synchronization request frame defined by the PIAFS standard via the data transmission line. Then, the data is transmitted to either one of the two data communication devices. Hereinafter, one of the data communication devices will be referred to as a data communication device on the synchronization start side, and the other data communication device will be referred to as a data communication device on the synchronization reception side. Upon receiving the synchronization request frame, the communication control device 34 of the synchronization reception side data communication device transmits the synchronization reception frame to the synchronization activation side data communication device via the data transmission line in response to the synchronization request frame. . The communication control devices 34 of both data communication devices establish frame synchronization based on the transmitted and received synchronization request and synchronization acceptance frame.

Next, a communication parameter negotiation sequence is executed. First, the communication control device 34 of the data communication device on the synchronous start side sends the communication parameter setting request frame shown in FIG. 3 to the data converter 35 based on the initial values of the respective communication parameters stored in the communication parameter initial value setting device 33. The data is created and transmitted from the PHS terminal 23 to the data communication device on the synchronization reception side. The initial value of the maximum frame number among the initial values of the respective communication parameters is determined by the memory capacity detection device 32 and the maximum frame number determination device 32.

FIG. 3 is a diagram showing the format of a communication parameter setting request frame. In this figure, the frame is divided into 1-byte (= 8 bits) and arranged in order of transmission from the top, and the rectangle of each row corresponds to a column of 1-byte bit. Numerical value “+0” to “+7” at the left end
"9" means that the bit in that row is 0 counting from the beginning of the frame
Indicates that it is the byte to the 79th byte. Also, the fact that the rectangle in each row is divided in the middle indicates that the bits in the divided portion represent one piece of information. The bits from the 13th byte to the 75th byte are used to represent the same information, and the bits from the 76th byte to the 79th byte are also used to represent the same information, so they are simply represented as a rectangle in one row. .

The communication parameter setting request frame includes a frame identification (FI), reservation, continuation, data length, sequence number, control information type, control information content identifier, ARQ data transfer protocol version, ARQ control information transmission protocol version, Measured RTF value, data compression method identifier, V.I. 42 bis codeword total number, 42bis maximum character string length, frame length, maximum frame number initial value,
Error detection code (F
CS) are arranged in order from the beginning of the frame. The reservation is a bit string whose purpose of use is not set by the current PIAFS standard. The bit string indicating the control information type is “0001” indicating the request frame, and the bit string indicating the control information content identifier is “000” indicating the information used for setting the communication parameter.
"00001" indicates that this frame is a communication parameter setting request frame. The information represented by the bit string from the beginning of the 5th byte to the end of the 12th byte is the initial value of the communication parameter of one of the data communication devices. The initial value of the maximum frame number of the data communication device on the synchronization start side is 8 in the 12th byte.
It is represented using one bit. In FIG. 3, a portion having a bit string representing the initial value of the maximum frame number in the communication parameter setting request frame is shown by hatching.

Referring again to FIG. Upon receiving the communication parameter setting request frame, the communication control device 34 of the data communication device on the synchronization reception side displays the initial values of the communication parameters in the frame and the communication parameter initial value setting device 33 in the data communication device on the synchronization reception side. The communication parameters used in the current communication are determined by comparing the stored initial values of the communication parameters. For example, among the initial values of the maximum frame numbers of the data communication devices on the synchronization activation side and the synchronization reception side, the smaller initial value is set as the maximum frame number used in this communication. The initial value of the maximum frame number among the initial values of the communication parameters to be compared is determined by the memory capacity detection device 31 and the maximum frame number determination device 32. When the communication parameters used in this communication are determined, the communication control device 34 of the data communication device on the synchronization reception side sends a communication parameter setting acceptance frame to the data conversion device 35 of the data communication device based on the determined communication parameters. It is created and transmitted from the PHS terminal 23 to the data communication device on the synchronization start side. The communication parameter setting acceptance frame has a configuration conforming to the above-mentioned communication parameter setting request frame, and includes a string of bits representing the value of the communication parameter used in this communication.

The communication control device 34 of the data communication device on the synchronous starting side, based on the communication parameter setting acceptance frame,
The communication parameters used in this communication are acquired and stored in the area in the memory device 39 where the communication parameters should be stored. In addition, even in the data communication device on the synchronization reception side, the communication parameters used in this communication are
The communication parameters are stored in the memory device 39 of the data communication device in an area where the communication parameters are to be stored. As a result, the communication parameter negotiation sequence ends.

After the end of the communication parameter negotiation sequence, the communication control devices 34 of both data communication devices
Two areas in the memory device 39 other than the areas specified for use for other purposes described above that can store the same number of data frames as the maximum frame number determined by the negotiation. These are set and used as the transmission and reception buffer devices 41 and 42.
Further, the data frames forming the data signal are transmitted and received between the two data communication devices based on the communication parameters determined by the negotiation. The details of transmission / reception of the data frame are the same as those defined by the PIAFS standard, for example, the same as those described in the related art.

FIG. 4 is a diagram showing in detail the negotiation of the maximum frame number in the communication parameter negotiation sequence. The negotiation of the maximum frame number will be described in detail with reference to FIG. In this description, it is assumed that the initial value of the maximum frame number of the data communication apparatus on the synchronization start side is 19 and the initial value of the maximum frame number of the data communication apparatus on the synchronization reception side is 63.

The communication control device 34 of the data communication device on the synchronization activation side sets the bit representing the maximum frame number in the communication parameter setting request frame as an initial value of the maximum frame number stored in the data communication device on the synchronization activation side. As 19, the data is transmitted to the data communication device on the synchronization reception side. The communication control device 34 of the data communication device on the synchronization reception side sets the maximum frame number used by the data communication device on the synchronization activation side in this communication to 19 based on the value of the bit representing the maximum frame number in the communication parameter setting request frame. Recognize that you are asking for.

Next, the communication control device 34 of the data communication device on the synchronization reception side sets the initial value of the maximum frame number of the data communication device on the synchronization reception side and the maximum frame number requested by the data communication device on the synchronization activation side. Compare and check the magnitude relationship. In this description, since the required maximum frame number is 19, the required maximum frame number is smaller than the initial value of the maximum frame number of the data communication device on the synchronization reception side. Therefore, the communication control device 34 of the data communication device on the synchronization reception side recognizes that the maximum frame number used in this communication is the requested maximum frame number 19, and the maximum frame number in the communication parameter setting reception frame is recognized. The bit representing the number is transmitted as the requested maximum frame number to the data communication device on the synchronization start side. Communication control device 34 of the data communication device on the synchronization start side
When the communication parameter setting acceptance frame is received, the maximum frame number used in this communication is the initial value 19 of the maximum frame number of the data communication device on the synchronization start side, based on the bit indicating the maximum frame number in the frame. It is considered that this has been accepted by the data communication device on the synchronization reception side, and it is recognized that 19 is used as the maximum frame number in this communication. As a result, both the data communication device on the synchronization start side and the data communication device on the synchronization reception side recognize that the maximum frame number used in this communication is 19.

When the initial value of the maximum frame number of the data communication device on the synchronization reception side is larger than the initial value of the maximum frame number of the data communication device on the synchronization activation side, the comparison result in the above description is reversed. Become. In this case, the communication control device 34 of the data communication device on the synchronization reception side recognizes that the maximum frame number used in this communication is the initial value of the maximum frame number of the data communication device on the synchronization reception side, and sets the communication parameter. The bit representing the maximum frame number in the reception frame is transmitted to the data communication device on the synchronization activation side as an initial value of the maximum frame number of the data communication device on the synchronization reception side. When the data communication device on the synchronization start side receives the communication parameter setting reception frame, the maximum frame number used for the current communication is set to the maximum frame number of the data communication device on the synchronization reception side based on the bit representing the maximum frame number in the frame. It is considered that the data communication device on the synchronization reception side recognizes that the initial value of is used, and in this communication, the initial value of the maximum frame number in the communication parameter setting reception frame is used as the maximum frame number.

Through the above processing, the data communication device on the synchronization start side and the data reception device on the synchronization reception side use the smaller initial value of the maximum frame numbers of both data communication devices as the maximum frame number used for this communication. Can be used for sending and receiving the subsequent data frames.

In the above description, the data communication device 21 is
PHS terminal 23, data terminal device 24, and communication processing device 2
The PHS terminal, the communication processing device 25, and at least one of the PHS terminal 23 and the data terminal device 24 may be integrated with each other. In the above description, the PHS terminal 23 is used as the communication device and the communication protocol is PIAFS. However, if the data communication device uses the communication protocol having a control variable that changes according to the memory capacity of the communication processing device. , Other communication protocols and communication devices may be used. For example, when using a communication protocol that determines a control variable for setting a buffer for storing a data signal in the memory device based on the total capacity of the memory device, based on the capacity detected by the memory capacity detection device, The maximum frame number determination device may set the control variable. The communication processing device of this embodiment is an example of the communication processing device of the present invention, and can be realized in various other forms as long as the main operations are the same. In particular, each device is not limited to the above-described operation and may perform another operation as long as the same processing result is obtained.

[0063]

As described above, according to the present invention, the communication processing device is provided with the storage means including the data signal storage means therein, the capacity of the storage means is automatically detected, and based on the detected capacity. Generate a control signal for storing the data signal. As a result, the productivity and reliability of the communication processing device can be improved as compared with the conventional communication processing device.

Further, according to the present invention, the communication processing device which uses the PHS terminal as the communication device and uses PIAFS as the communication protocol can automatically determine the initial value of the maximum frame number based on the capacity of the storage means. it can. The productivity and reliability of the communication processing device can be improved as compared with the communication processing device using the conventional PIAFS.

Furthermore, according to the present invention, the maximum frame number determining means divides the difference Rb obtained by subtracting the first capacity RC1 from the detected capacity Ra of the storage means by the second capacity RC2 and calculating the quotient. A value N2, which is a half of N1, is set as the initial value of the maximum frame number. With this, the initial value of the maximum frame number can be automatically determined. Further, the initial value can be the maximum value that can be realized by this storage means.

Further, according to the present invention, the maximum frame number determining means sets a candidate value of an initial value of the maximum frame number based on the capacity of the storage means detected by the capacity detecting means, and sets the candidate value. The initial value of the maximum frame number is determined by comparing with a predetermined upper limit value of the maximum frame number. As a result, the capacity of the memory implemented as the storage unit can be selected without being restricted by the upper limit value.

Further, according to the present invention, the capacity detecting means stores the inspection data in a plurality of addresses which are expected to be set in the storage means, and a read value and a written value are read from each address. Then, the capacity of the storage means is obtained based on the number of addresses matching with each other. by this,
The capacity of the storage means can be detected automatically.

[Brief description of drawings]

FIG. 1 is a communication processing device 25 according to an embodiment of the present invention.
FIG. 3 is a block diagram showing an electrical configuration of a data communication device 21 provided with.

FIG. 2 is a sequence diagram for explaining an operation performed at the start of data communication performed using the data communication device 21.

FIG. 3 is a diagram for explaining a format of a communication parameter setting request frame.

FIG. 4 is a sequence diagram for describing in detail the negotiation of the maximum frame number in the negotiation sequence of data communication performed using the data communication device 21.

FIG. 5 is a block diagram showing an electrical configuration of a data communication device 1 including a communication processing device 5 of a conventional technique.

[Explanation of symbols]

23 PHS terminal 24 Data terminal equipment 25 Communication processor 31 Memory capacity detector 32 Maximum frame number determination device 33 Communication parameter initial value setting device 34 Communication control device 37 PIAFS framing device 38 PIAFS deframing device 39 memory device 41 Transmission buffer device 42 Receive buffer device

Claims (5)

(57) [Claims] 1. A data signal storage means for storing a data signal to be transmitted / received between a controlled communication device and a partner communication device, and a data signal stored in the data signal storage device is given to the communication device for transmission / reception. Or a communication processing unit including a communication control unit that stores the data signal received by the communication unit in the data signal storage unit, the storage unit including the data signal storage unit therein, and the capacity of the storage unit are detected. And a control signal setting means for setting a control signal for controlling the operation relating to the data signal storage means of the partner communication device or the communication device to be controlled based on the detected capacity. A characteristic communication control device. 2. A personal handyphone system.
Based on the Internet Access Forum Standard, in order to send and receive a data signal composed of multiple data frames between a communication device to be controlled, which is a personal handyphone system, and a communication device on the other side, Storage unit for internally setting a transmission buffer unit for storing a data frame to be transmitted by the communication device and a reception buffer unit for storing a data frame received by the communication device to be controlled; and data stored in the transmission buffer unit. In a communication processing device including communication control means for giving a frame to a communication device to be controlled to be transmitted and storing a data frame received by the communication device to be controlled in a reception buffer section, a capacity for detecting the capacity of the storage means The maximum means for determining the detection means and the capacity of the transmit and receive buffer sections. The initial value of the frame number further includes a maximum frame number determining means for determining based on the detected capacity of the storage means, the communication control means, prior to the transmission and reception of the data frame, to the communication device to be controlled, Communication processing characterized by transmitting the initial value of the maximum frame number determined by the maximum frame number determining means, and setting the transmission and reception buffer units in the storage means based on the initial value of the transmitted and received maximum frame number. apparatus. 3. The maximum frame number determining means subtracts a predetermined first capacity used for storing data other than the data frame from the capacity of the storage means detected by the capacity detecting means. 3. The communication according to claim 2, wherein a value of half of a quotient obtained by dividing the difference by a predetermined second capacity for storing a single data frame is determined as the initial value of the maximum frame number. Processing equipment. 4. The maximum frame number determination means subtracts a predetermined first capacity used for storing data other than the data frame from the capacity of the storage means detected by the capacity detection means. A half value of the quotient obtained by dividing the difference by a predetermined second capacity for storing the single data frame is compared with a predetermined upper limit value of the maximum frame number, and the half value of the quotient is the upper limit value. 3. The communication process according to claim 2, wherein the initial value is set to an upper limit value when the value exceeds the upper limit, and the initial value is set to a half value when the half of the quotient is less than or equal to the upper limit. apparatus. 5. The capacity detecting means stores predetermined inspection data in a plurality of addresses expected to be preset in the storage means, reads the data stored in each address, and reads out the data stored in each address. And comparing the data read from the address with the inspection data stored at the address, and determining the capacity of the storage means based on the address at which the read data and the inspection data match. The communication processing device according to claim 2.