JP2001211206A - Retransmission identifier processing unit and radio communication unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retransmission identifier processing unit and a radio communication unit that can surely differentiate a numerical value of a retransmission identifier, used for packet communication from each transmission procedure. SOLUTION: A control circuit for a mobile phone compares a random number (step S1) generated by a random number generating program with the numerical value of a retransmission identifier used in a preceding transmission procedure stored in a memory (step S2, S3) and adds '1' to the random number generated this time and revise the random number (step S6), when the both are coincident. Thus, the numerical value of the retransmission identifier can by set surely to a different value from each transmission procedure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retransmission identifier processing device for performing a predetermined process on a retransmission identifier used for packet communication, and a radio communication device for performing packet communication via a radio signal.

[0002]

2. Description of the Related Art In recent years, there has been provided a service of performing data communication using a radio signal by a packet communication system by connecting a data terminal such as a personal computer and a digital portable telephone device. The packet communication method is a method of transmitting and receiving data in packet units when, for example, browsing a home page via the Internet or transmitting and receiving an e-mail. Is charged in accordance with the transmission amount of the communication line, so that the communication line can be always connected and used. On the other hand, the system has an advantage that the use efficiency of the communication line can be dramatically improved.

[0003] The transmitting terminal of the mobile station executes a certain transmission procedure with the base station when starting transmission in packet communication, when changing the communication channel or when disconnecting communication. At this time, a retransmission identifier is added to a signal transmitted to the base station. The retransmission identifier is an arbitrary numerical value composed of a plurality of bits used for confirming whether a signal transmitted by the transmitting terminal to the base station has arrived.

When returning a response to the transmitting terminal, the base station adds a retransmission identifier having the same numerical value as the retransmission identifier assigned to the received signal to the response signal and transmits the response signal. Then, when the transmitting terminal receives a response signal to which the same numerical value as the retransmission identifier assigned to itself is given, it determines that the signal has been received by the base station without fail.

[0005]

However, when a random number generation program, for example, is used to generate a numerical value of the retransmission identifier, the numerical value used for the previous transmission and the numerical value used for the current transmission are determined by the random number generation probability. May match. If the transmitting terminal does not return a response from the base station within a certain period of time after performing the transmission, it performs the transmission again, but in that case, adds a newly generated retransmission identifier. Therefore, if the value of the new retransmission identifier becomes the same as the previous one and the transmission procedure proceeds normally and a response is returned, the transmitting terminal determines whether the response is for the previous transmission or for the current transmission. There was a problem that the distinction could not be made and the execution of the procedure was confused.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a retransmission identifier processing apparatus capable of reliably setting a numerical value of a retransmission identifier used for packet communication to a different value for each transmission procedure. And a wireless communication device.

[0007]

According to the retransmission identifier processing apparatus of the present invention, the numerical value changing means includes a numerical value of the retransmission identifier generated by the numerical value generation means when the transmission procedure of the packet communication is executed. Is compared with the numerical value of the retransmission identifier stored in the storage means and used in the previous transmission procedure, and if the values match, the former numerical value is changed. Therefore, the value of the retransmission identifier can be reliably set to a different value for each transmission procedure, and confusion in the execution of the procedure can be prevented from occurring.

According to the second aspect of the present invention, the communication control means executes the transmission procedure of the packet communication by wireless communication using the retransmission identifier processed by the retransmission identifier processing apparatus of the first aspect. Therefore, handshake with the base station in the transmission procedure can be reliably performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a configuration example of a terminal device that performs packet communication. A mobile phone device (wireless communication device) 1 includes a connection cable 2 and a PCMC.
A personal computer (hereinafter, referred to as an IA card 3)
4 is connected to the card slot 4a of the PC 4. The personal computer 4 is equipped with driver software for setting the PCMCIA card 3 so that it can be used. The personal computer 4 connects the communication line to the packet communication network 5 via the mobile phone device 1 so that an external device can be used. It is possible to send and receive data to and from.

FIG. 4 is a functional block diagram showing an electric configuration of the portable telephone device 1. As shown in FIG. The mobile phone device 1 is mainly composed of a control circuit (communication control means, numerical value generation means, numerical value change means, retransmission identifier processing device) 6 composed of a microcomputer or the like. Is supplied through a key operation identification circuit 8. The control circuit 6 controls display on the display 10 via the display control circuit 9.

When the audio signal input to the microphone 11 is applied to the audio input / output circuit 12 and A / D converted, for example, π / 4 shift DQPSK (Differential Quadrature PQ)
haseShift Keying) signal. Then, the transmission data converted (digitally modulated) into the DQPSK signal is supplied to the radio circuit 13 via the control circuit 6, where it is orthogonally modulated by a carrier signal in the 800 MHz band, and transmitted to the outside as a radio signal from the antenna 14. It has become.

When the antenna 14 receives a radio signal, the received signal is demodulated in the radio circuit 13 and supplied to the audio input / output circuit 12 via the control circuit 6. Then, when D / A conversion is performed in the audio input / output circuit 12, the audio signal is output from the speaker 15 as an audio signal.

The external terminal connection circuit 16 is an interface for connecting a personal computer 4 or the like via the connection cable 2 and the PCMCIA card 3, as shown in FIG. The control circuit 6 controls the above circuits 8, 9, 12, and 16, while the radio circuit 13 sends a control signal to the control circuit 6 to detect an incoming signal, a detected value of a transmitted signal or a received signal level, or the like. Information is provided.
The control circuit 6 is connected with a memory (storage means) 17 such as a RAM or an EEPROM.
Is designed to write and read data to and from the memory 17 as needed.

The control circuit 6 connects the wireless communication line to perform a voice call, and connects the communication line to the packet communication network 5 as described above, so that the PPP (Poi
nt to Point Protocol), TCP (Transmission Control)
It is possible to perform packet communication (data communication) with the outside based on a communication protocol such as Protocol (Protcol) / IP (Internet Protocol).

Next, the operation of the present embodiment will be described with reference to FIGS. FIG. 2 is a signal flow schematically showing a procedure between the mobile phone device (terminal) 1 and the base station when performing packet communication. Mobile phone device 1
First transmits a registration request signal when starting packet communication, generates a retransmission identifier A prior to the transmission, adds the generated retransmission identifier A to the communication registration request signal, and transmits the signal.

Upon receiving the request signal from the mobile phone 1, the base station returns a communication registration response signal to the mobile phone 1 after performing predetermined processing. At this time, the base station adds the communication registration response signal to the request signal. A reply is sent with the retransmission identifier A added. The mobile phone device 1 compares the value of the retransmission identifier added to the received response signal with the value of the retransmission identifier added to the request signal by itself, and when the two match each other (A = A).
Determines that the received response signal has been transmitted to itself, and accepts the response signal.

On the other hand, when the retransmission identifier added to the received response signal is C with respect to the retransmission identifier B added to the request signal by itself, the response signal is transmitted to itself. Judge that it is not a thing and discard it. Once the retransmission identifier is generated, the same numerical value is used until the subsequent series of communication processing (line connection, line disconnection) is completed. After the line is disconnected and the communication processing is completed, a new retransmission identifier is used again. When a new communication process is started, it is newly generated. Also, when a certain communication process fails and the same process is repeated again, a retransmission identifier is newly generated.

FIG. 1 is a flow chart showing the contents of processing relating to the retransmission identifier executed by the control circuit 6 of the portable telephone device 1 when the communication processing is started. For example, when the user operates the personal computer 4 to transmit an e-mail via the packet communication network 5 and the Internet, the user connects to the control circuit 6 of the mobile phone device 1 via the PCMCIA card 3 and the connection cable 2. When the call command for the destination telephone number is output, the flowchart of FIG. 1 is executed.

When the control circuit 6 first obtains a 16-bit random number from the random number generation program of the subroutine (step S1, numerical value generating means), it is used as a retransmission identifier in the previous communication processing, and is used in step S5 described later. Reads the random number written in the memory 17 (step S
2). Then, it is determined whether the random number acquired in step S1 this time is not equal to the numerical value of the previous retransmission identifier (step S3).

If the two are not equal in step S3 ("YES"), the control circuit 6 sets the random number obtained in step S1 as the current retransmission identifier (step S4) and writes the random number value into the memory 17. And the process is terminated (step S5). On the other hand, if the two values are equal in step S3 (“NO”), a value obtained by adding “1” to the random number obtained in step S1 is set as the current retransmission identifier (step S6). Transition. Steps S3 and S6 correspond to numerical value changing means.

Therefore, if the random number to be used as the retransmission identifier in the current communication processing coincides with the value of the previous retransmission identifier by chance, step S
In step 6, 1 is added to the current random value,
A retransmission identifier having a value that is definitely different from the previous value is set. Then, the set retransmission identifier is UPCH (User
By being written in the information field of the Packet CHannel, it is added to the communication registration request signal as described above and transmitted to the base station.

When the subsequent procedure is performed normally, information such as the network ID corresponding to the connection destination telephone number and the number of the accommodated PGW (packet gateway relay processing device) is obtained at the base station, and the line (virtual) to the PGW After the connection is established and the cellular phone device 1 performs a PPP connection establishment procedure, for example, transmission of a data packet, which is actual transmission content as e-mail, is performed to the connection destination.

As described above, according to the present embodiment, the control circuit 6 of the mobile phone 1 stores the random number generated by the random number generation program and the memory 17 when the transmission procedure of the packet communication is executed. The number is compared with the value of the retransmission identifier used in the previous transmission procedure, and if they match, the random number generated this time is changed by adding "1". Therefore, the value of the retransmission identifier can be reliably set to a different value for each transmission procedure, and confusion in the execution of the procedure can be prevented from occurring.

Since the control circuit 6 executes the packet communication transmission procedure using the retransmission identifier processed as described above, the handshake with the base station in the transmission procedure can be reliably performed. .

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible. The retransmission identifier is not limited to 16-bit data, and the number of data bits may be changed as appropriate. The method of changing the generated random number is not limited to the method of adding “1”, but may be a method of adding a value of “2” or more or decreasing a value of “1” or more. Alternatively, it may be changed by shifting left. The wireless communication device is not limited to the mobile phone device 1, but may be a PHS (Pers
onal Handyphone System).

[Brief description of the drawings]

FIG. 1 is a flowchart showing processing contents relating to a retransmission identifier executed by a control circuit of a mobile phone device when communication processing is started, according to an embodiment of the present invention;

FIG. 2 is a signal flow schematically showing a procedure between a mobile phone device and a base station when performing packet communication.

FIG. 3 is a configuration example of a terminal device that performs packet communication, and is a diagram illustrating a connection state between a mobile phone device and a personal computer.

FIG. 4 is a functional block diagram showing an electrical configuration of the mobile phone device.

[Explanation of symbols]

Reference numeral 1 denotes a mobile phone device (wireless communication device), 6 denotes a control circuit (communication control means, numerical value generating means, numerical value changing means, retransmission identifier processing device), and 17 denotes a memory (storage means).

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (Reference) 9A001 F-term (Reference) 5K014 AA01 BA01 EA01 FA03 5K027 AA11 BB05 CC01 EE01 EE11 KK02 LL05 5K030 GA12 HA08 HB12 HC09 JL01 KA03 LA02 MB13 5K03 DD01 EE01 LL06 5K101 KK20 LL12 MM05 NN22 NN25 NN34 PP05 RR15 SS07 SS08 TT01 UU17 VV01 9A001 BB02 BB03 BB04 CC03 CC05 CC06 DD10 EE02 EE05 GG03 JJ18 KK56 LL09

Claims (2)

[Claims] In a transmission procedure of packet communication, a numerical value generating means for generating a numerical value of a retransmission identifier to be added to a transmission signal, and the numerical value of the retransmission identifier generated by the numerical value generating means executes the transmitting procedure. Storage means stored for each transmission, when the transmission procedure is executed, the numerical value of the retransmission identifier generated by the numerical value generation means, and the retransmission used in the previous transmission procedure stored in the storage means Compare with the numerical value of the identifier, and if they match,
A retransmission identifier processing device, comprising: a numerical value changing means for changing the former numerical value. 2. A wireless communication apparatus comprising: the retransmission identifier processing device according to claim 1; and a communication control unit that executes the transmission procedure using a retransmission identifier processed by the retransmission identifier processing device. .