JP2000101509A - Radio communication equipment, communication speed control method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radio communication equipment, a communication speed control method and a storage medium capable of realizing a data communication/voice communication service at an optimum communication speed corresponding to the operation condition of a CPU, preventing an operation at an unnecessarily high communication speed and utilizing a battery which is the limited resource of portable radio terminal equipment corresponding to radio channel quality. SOLUTION: This radio communication equipment is provided with a CPU working rate detection means 153 for detecting the working rate of the CPU based on the number of times of executing a valid instruction for accessing the work area of a transmission/reception data processing and the number of reception frames and a communication speed selection means 152 for selecting the communication speed from a communication speed selection table based on the working rate detected in the CPU working rate detection means 153. Thus, by detecting the working rate of the CPU and deciding the communication speed based on the detected working rate, the data communication/voice communication service at the optimum communication speed corresponding to the operation condition of the CPU is realized, the operation at the unnecessarily high communication speed is prevented and the battery which is the limited resource of the radio communication equipment (radio communication equipment such as portable radio terminal equipment) is utilized corresponding to the radio channel quality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device, a communication speed control method, and a storage medium. More particularly, the present invention relates to a radio communication speed selectable from a plurality of specified values.
In a variable communication speed wireless terminal device accommodated in a wireless communication system (such as a broadband CDMA mobile communication system) that requires higher transmission power in order to obtain good wireless channel quality, the communication speed of the communication device in consideration of power consumption is reduced. The present invention relates to a wireless communication device, a communication speed control method, and a storage medium suitable for performing setting / change.

[0002]

2. Description of the Related Art Conventionally, a PDC (Personal Di) has been developed.
digital Cellular: PHS (Personal Handy-pho)
ne System: TDMA (Time Division Multiple) represented by a simplified type mobile phone
In a wireless communication system such as a le Access (time-division multiple access) type mobile communication system, the transmission output on the wireless terminal side is controlled because the idea is that the received electric field strength on the base station side should exceed a reference value. There was no provision for doing so. Also, the communication speed was constant irrespective of the remaining battery level and the quality of the wireless communication line.

[0003] In the above-mentioned radio communication system, a radio line with a high communication speed requires better radio line quality than a radio line with a low communication speed. Further, only the reception electric field strength is used for the determination of the radio channel quality, and it is general that larger transmission power is required to obtain good radio channel quality.

[0004]

However, in the above-mentioned conventional example, since the communication speed is constant, the communication speed can be increased even when the CPU load (operating rate) is large, that is, even when the amount of communication data is large. However, there is a problem that the data communication time increases and the battery is consumed.
Further, since the transmission power is constant, there is a problem that constant power is always consumed even when the amount of communication data is small.

In recent years, wideband CDMA (W-CDM)
A) There is a difference in required communication line quality depending on the communication speed provided by a wireless line, such as mobile communication, and a wireless communication system capable of selecting the communication speed is emerging. is there.

However, in this type of wireless communication system, it is possible to select the communication speed according to the communication line quality, but it is not possible to adaptively select the communication speed according to the amount of communication data. . For example, when the communication data amount is large, the load on the CPU is large, and the power consumption of the CPU is necessarily large. Therefore, it is necessary to end the communication promptly, but the communication speed cannot be increased unless the quality of the communication line increases.

[0007] In the case of a portable wireless terminal device, a power source (battery) for operating the device is a finite resource, and an increase in communication time consumes the battery and shortens the operable time of the device. become.

The present invention has been made in view of the above points, and realizes a data communication / voice communication service at an optimum communication speed according to the operation state of a CPU, and at an unnecessarily high communication speed. It is an object of the present invention to provide a wireless communication device, a communication speed control method, and a storage medium that can prevent the operation of a wireless communication device and use a battery, which is a finite resource of a portable wireless terminal device, in accordance with the quality of a wireless line. I do.

[0009]

According to one aspect of the present invention, a CPU for wireless communication processing is provided.
Wireless communication device having an operating rate detecting means for detecting an operating rate of the CPU, and a communication speed controlling means for determining a communication speed based on the operating rate detected by the operating rate detecting means. And

In order to achieve the above object, the present invention according to claim 2 is characterized in that the operating rate detecting means detects the operating rate of the CPU based on the number of executions of valid instructions and the number of received frames. I do.

According to a third aspect of the present invention, in the present invention, the operation rate detecting means is configured to execute the effective command for accessing the work area of the transmission / reception data processing and the number of received frames based on the number of received frames. The operation rate is detected.

In order to achieve the above object, the present invention according to a fourth aspect of the present invention provides the present invention, wherein the operating rate detecting means is configured to execute the valid instruction for accessing the input / output address of the transmission / reception data based on the number of executions and the number of received frames. The operation rate is detected.

According to a fifth aspect of the present invention, in order to achieve the above object, the communication speed control means selects a communication speed from a communication speed selection table based on an operation rate detected by the operation rate detection means. It is characterized by.

In order to achieve the above object, according to the present invention, the communication speed control means continuously varies the communication speed based on the operation rate detected by the operation rate detection means. And

According to a seventh aspect of the present invention, there is provided a wireless communication system adapted to a wideband CDMA mobile communication system.

In order to achieve the above object, the present invention according to claim 8 is characterized by performing wireless communication corresponding to a narrow band CDMA mobile communication system.

According to a ninth aspect of the present invention, there is provided a communication speed control method applied to a wireless communication apparatus having a CPU for wireless communication processing.
An operation rate detecting step of detecting an operation rate of U and a communication speed control step of determining a communication speed based on the operation rate detected in the operation rate detection step are provided.

In order to achieve the above object, the present invention according to a tenth aspect is characterized in that, in the operation rate detecting step, the operation rate of the CPU is detected based on the number of executions of valid instructions and the number of received frames. I do.

In order to achieve the above object, the present invention according to an eleventh aspect of the present invention is that, in the operation rate detecting step, the CPU of the CPU is executed based on the number of executions of a valid instruction for accessing a work area of transmission / reception data processing and the number of received frames. The operation rate is detected.

According to a twelfth aspect of the present invention, in the operating rate detecting step, the CPU of the CPU is configured to execute the valid instruction for accessing an input / output address of transmission / reception data and the number of received frames. The operation rate is detected.

According to a thirteenth aspect of the present invention, in the communication speed control step, the communication speed is selected from a communication speed selection table based on the operation ratio detected in the operation ratio detection step. It is characterized by.

In order to achieve the above object, according to the present invention, in the communication speed control step, the communication speed is continuously varied based on the operation rate detected in the operation rate detection step. And

In order to achieve the above object, the present invention according to claim 15 is characterized in that it can be applied to a wireless communication apparatus for performing wireless communication corresponding to a wideband CDMA mobile communication system.

[0024] In order to achieve the above object, the present invention according to claim 16 is characterized in that it is applicable to a radio communication apparatus for performing radio communication corresponding to a narrow band CDMA mobile communication system.

In order to achieve the above object, the present invention according to claim 17 is readable by a computer storing a program for executing a communication speed control method applied to a wireless communication device having a CPU for wireless communication processing. A communication speed control method, wherein the communication speed control method comprises: an operation ratio detection step of detecting an operation ratio of the CPU; and a communication speed control step of determining a communication speed based on the operation ratio detected in the operation ratio detection step. It is characterized by having.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

As an embodiment of the present invention, a broadband CDM
1 shows an example of a portable wireless terminal device for an A (W-CDMA) mobile communication system.

FIG. 2 shows a W-CD according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram illustrating a configuration of an MA mobile communication system.
The W-CDMA mobile communication system according to the embodiment of the present invention includes a communication speed variable wireless communication terminal device 21, a wireless base station 22A, a wireless base station 22B, a wireless control device 23,
ISDN (Integrated ServicesD)
digital Network) 24, ATM (Asy)
nchronous Transfer Mode) 2
5. LAN (Local Area Network) 2
6 and so on. In the figure, 20A and 20B indicate notification signals. Note that the system configuration shown in FIG. 2 is an example and is not limited to the illustrated configuration.

The structure of each of the above components will be described in detail. The variable communication speed type wireless communication terminal device 21 is a wireless communication terminal device to which the present invention is applied and has a variable communication speed. Perform communication. The wireless base station 22A and the wireless base station 22B manage connection between a wireless communication line and a wired communication line. The wireless control device 23 includes a wireless base station 22A,
2B connected wired communication line and existing communication network (ISD
N24, ATM 25, LAN 26, etc.), and routes a communication path with the wireless communication terminal device. The broadcast signals 20A and 20B regularly transmit information essential for system control, such as the communication carrier to which the radio base stations 22A and 22B provide the service, the identification information of the radio base station of the signal transmission source, and the like. Signal.

FIG. 3 shows a W-CD according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram showing an information format of broadcast signals 20A and 20B of the MA mobile communication system. On the air slot, the broadcast signal is divided into two radio frames 37a and 37b.
, And are decoded by baseband processing on the wireless communication terminal device side, and the contents indicated by 31 to 36 are read out.

Reference numeral 31 denotes information indicating the type of the broadcast signal; 32, the transmission power of the source base station of the broadcast signal; 33, an information frame number added cyclically; Interference information, 35 is an information element detailed area for transmitting identification information of a communication carrier or a radio base station or various information necessary for system control, and 36 is an error correction for detecting and correcting an error in the decoding. Sign.

FIG. 1 shows a W-CD according to an embodiment of the present invention.
FIG. 2 is a functional block diagram illustrating a configuration of a variable communication speed wireless communication terminal device of the MA mobile communication system. The variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention includes a radio unit 11, a baseband processing unit 12, a frame disassembly unit 13, a communication application 14, And a control unit 15. Further, the control unit 15 includes a communication control processing unit 151,
Communication speed selection means 152 and valid instruction execution counter 15
3a, a CPU operating rate detecting means 153 having a receiving frame counter 153b.

The structure of each of the above units will be described in detail.
Manages transmission and reception of radio waves. The baseband processing unit 12
Controls modulation and demodulation. The frame disassembly / assembly unit 13 manages disassembly / assembly of transmission / reception data in units of frames. The communication application 14 is various communication applications that make a wireless line connection request, which will be described later. The control unit 15 controls the wireless communication and the communication application 14, and executes processing shown in flowcharts of FIGS. 4 and 5 described later.

The communication control processing means 151 of the control unit 15
Perform communication control processing. Communication speed selection means 1 of control unit 15
52 selects a predetermined communication speed. CP of control unit 15
The U operating rate detection means 153 detects the CPU operating rate, and includes a valid instruction execution counter 153a for storing the number of executions of the valid instruction, a reception frame counter 153b for storing the number of received frames, and It has. As the valid command, a command for accessing a work area on a memory for processing transmission / reception data is specified. The instruction processing of the CPU includes states of instruction fetch, instruction decoding, data loading, instruction execution, and write-back (result storage).

A general CPU outputs a state display signal (state signal) indicating the current state. By monitoring this state signal, the number of instruction executions can be detected. Here, the instruction execution count when accessing the work area on the memory for processing the transmission / reception data is stored in the effective instruction execution counter 153a.

The correspondence relationship between each component in the claims and each unit in the variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention is as follows. is there. The operating rate detecting means corresponds to the CPU operating rate detecting means 153, and the communication speed control means corresponds to the communication speed selecting means 152.

Next, when a wireless channel is set by a trigger from a variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention configured as described above, the wireless channel is set. The process for selecting the communication speed requested in the above will be described with reference to FIGS.

FIGS. 4 and 5 are flowcharts showing a communication speed selection process in the variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention. FIG. 6 is a diagram showing a W- according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an information format of a broadcast signal of the CDMA mobile communication system. In the figure, 61a and 61b denote radio frames, 62a to 62p denote time slots, 63 denotes synchronization pull-in information, 64 denotes power control information, and 65 denotes a logical channel information area. FIG. 7 is an explanatory diagram showing a communication speed selection table in the variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention. The communication speed in the communication speed selection table is an example, and is not limited to the illustrated values.

The control unit 15 that has received the wireless line connection request from the communication application 14 or the like starts this processing before starting the wireless line connection sequence. First, the notification signals 20A and 20B that the connection target wireless base stations 22A and 22B are constantly transmitting are received (step S40).
1). The validity of the received broadcast signal is determined by an operation using the error correction code 36 (step S402), and if there is an error in the reception, it is determined whether the error is a predetermined number of consecutive errors (step S408). ).

If the error is within the specified number of times in step S408, the notification signal is received again (step S4).
01) If the number of errors has reached the specified number in step S408, the line setting disabled status is set (step S409), and the process ends. If the line setting disabled status is set, it is determined that the radio line quality is poor, and the radio line connection sequence is not activated. On the other hand, if there is no error in the reception in step S402, the wireless line connection sequence is started. This causes a transition to the communication phase (step S403), and the connection state of the wireless line is established. On the air slot, a communication channel having the signal format of FIG. 6 is transmitted and received.

The following processing is started every time a radio frame of 10 ms is received. The value of the valid instruction execution counter 153a of the CPU operation rate detecting means 153 of the control unit 15 is updated each time the execution of a valid instruction is detected.
Here, when the radio frame is received, the reception frame counter 153b is incremented (step S40).
4) Next, it is determined whether the number of received frames has reached the specified number (step S405).

If the number of received frames is equal to or smaller than the specified number in step S405, one processing unit of the present processing ends. If the number of received frames has reached the specified number in step S405, the communication speed selection means 152 of the control unit 15 refers to the value of the valid command execution counter 153a and, according to the communication speed selection table of FIG. A communication speed defined by the number of executions is selected (step S406). For example, if the number of instruction executions is equal to or more than a, the maximum speed is 2 Mb
Select ps. Thereafter, the valid instruction execution counter 153
a and the received frame counter 153b are reset (step S407), and one processing unit of this processing is ended.

As described above, according to the embodiment of the present invention, a service zone is formed by a plurality of wireless cells formed by a plurality of wireless base stations connected to a wired communication network, and a service zone is formed in the service zone. Make a wireless connection with an existing wireless terminal, and after the wireless line connection, instruct the wireless terminal being connected to the line to control the transmission power of the wireless terminal from the wireless base station using the additional information of the communication channel. Can be selected from among a plurality of specified values, and a W-CDMA that requires a larger transmission power to obtain good wireless channel quality is possible.
In the mobile communication system, the communication speed variable type wireless communication terminal device performs a command based on the number of executions of an effective command for accessing a work area of transmission / reception data processing and the number of received frames.
CPU operation rate detection means 153 for detecting the operation rate of PU
And a communication speed selection unit 152 for selecting a communication speed from a communication speed selection table based on the operation ratio detected by the CPU operation ratio detection unit 153, so that the following operations and effects are achieved.

When the number of received frames has reached the specified number, the communication speed selecting means 152 of the communication speed variable type wireless communication terminal device refers to the value of the valid command execution counter 153a,
A communication speed specified by the number of valid instruction executions is selected from the communication speed selection table. That is, the communication speed is determined according to the desired condition stored in the variable communication speed wireless communication terminal device according to the operation status (operating rate) of the CPU.

Therefore, in the embodiment of the present invention,
By measuring the CPU operation rate related to the processing of transmission / reception data, data communication / voice communication services at the optimal communication speed according to the operation status of the CPU can be realized, and operation at an unnecessarily high communication speed is performed. There is an effect that it is possible to use the battery, which is a finite resource of the portable wireless terminal device, according to the quality of the wireless channel.

In addition to the above-described embodiment of the present invention, the following other embodiments can be considered.

In the above embodiment, the communication speed can be selected from a plurality of specified values, and a wireless line with a high communication speed requires better wireless line quality than a wireless line with a low communication speed. Wideband CDMA is an example of a variable communication speed wireless communication terminal device for a wireless communication system.
Although an example of a portable wireless terminal device for a (W-CDMA) mobile communication system has been described, a portable wireless terminal device of a system (such as a narrow band CDMA mobile communication system) using another similar communication medium has been described. This is also effective for selecting and changing the communication speed.

In the above embodiment, the communication speed can be selected from a plurality of specified values. However, it is also effective to make the communication speed continuously variable according to the value of the CPU operating rate. Further, the execution state of an instruction for accessing a work area for processing transmission / reception data is used as a valid instruction for detecting the CPU operation rate, but the essence of the present invention is not limited to this. For example, the same effect can be obtained by using the write-back (result storage) state of the above instruction. Similarly, an instruction to access an address when the control unit 15 inputs / outputs transmission / reception data from / to the frame disassembly / assembly unit 13 can be used as a valid instruction.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. A storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or an apparatus, and a computer (or CPU or MPU) of the system or the apparatus executes the program code stored in the storage medium. Needless to say, this can also be achieved by executing the reading.

In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS and the like running on the computer are actually executed based on the instructions of the program code. It goes without saying that a part or all of the above-described processing is performed, and the functions of the above-described embodiments are realized by the processing.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instructions of the program code, It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0054]

As described above, according to the radio communication apparatus of the present invention, the CPU for radio communication processing is provided.
Wireless communication device having an operation rate detection means for detecting the operation rate of the CPU, and a communication speed control means for determining a communication speed based on the operation rate detected by the operation rate detection means, The effect is as follows. By detecting the operation rate of the CPU and determining the communication speed based on the detected operation rate, a data communication / voice communication service at an optimum communication speed according to the operation state of the CPU is realized,
Operation at an unnecessarily high communication speed can be prevented, and a battery, which is a finite resource of a wireless communication device (a wireless communication device such as a portable wireless terminal device), can be used in accordance with wireless line quality. effective.

According to the second aspect of the present invention, the operating rate detecting means detects the operating rate of the CPU based on the number of executions of the valid command and the number of received frames. It works. By detecting the operation rate of the CPU based on the number of executions of the valid command and the number of received frames, and determining the communication speed based on the detected operation rate, the CP
Data communication at the optimal communication speed according to the operating conditions of U /
In addition to realizing voice communication services, it prevents unnecessary operation at high communication speeds and reduces the battery, which is a finite resource of wireless communication devices (wireless communication devices such as portable wireless terminal devices), according to the quality of the wireless line. This has the effect that it can be used.

According to the wireless communication apparatus of the present invention, the operating rate detecting means is configured to execute the operating rate of the CPU based on the number of executions of the valid command for accessing the work area of the transmission / reception data processing and the number of received frames. Has the following effects. The operation rate of the CPU is detected based on the number of executions of the valid command and the number of received frames for accessing the work area of the transmission / reception data processing, and the communication speed is determined based on the detected operation rate. Realizing data communication / voice communication service at high communication speed and preventing operation at unnecessarily high communication speed by using limited resources of wireless communication devices (wireless communication devices such as portable wireless terminal devices). There is an effect that a certain battery can be used according to the quality of the wireless line.

According to a fourth aspect of the present invention, the operating rate detecting means is configured to execute the operating rate of the CPU based on the number of executions of a valid instruction for accessing an input / output address of transmission / reception data and the number of received frames. Has the following effects. The operating rate of the CPU is detected based on the number of executions of the valid instruction for accessing the input / output address of the transmission / reception data and the number of received frames, and the communication speed is determined based on the detected operating rate. Realizing data communication / voice communication service at high communication speed and preventing operation at unnecessarily high communication speed by using limited resources of wireless communication devices (wireless communication devices such as portable wireless terminal devices). There is an effect that a certain battery can be used according to the quality of the wireless line.

According to the wireless communication apparatus of the present invention, the communication speed control means selects the communication speed from the communication speed selection table based on the operation rate detected by the operation rate detection means. The effect is as follows. CPU
By selecting the communication speed from the communication speed selection table based on the operating rate of the CPU, the data communication / voice communication service at the optimum communication speed according to the operation state of the CPU is realized, and the communication speed is unnecessarily high. The operation described above can be prevented and a battery, which is a finite resource of a wireless communication device (a wireless communication device such as a portable wireless terminal device), can be used in accordance with the quality of the wireless channel.

According to the wireless communication apparatus of the present invention, the communication speed control means continuously varies the communication speed based on the operation rate detected by the operation rate detection means. Effect. By continuously changing the communication speed based on the operation rate of the CPU, a data communication / voice communication service at an optimum communication speed according to the operation state of the CPU is realized, and an unnecessary high speed communication speed is used. There is an effect that the operation is prevented and a battery, which is a finite resource of a wireless communication device (a wireless communication device such as a portable wireless terminal device), can be used according to the quality of the wireless line.

According to the wireless communication apparatus of the present invention, since the wireless communication corresponding to the broadband CDMA mobile communication system is performed, the following effects can be obtained. In a wireless communication device that performs wireless communication corresponding to a broadband CDMA mobile communication system, a data communication / voice communication service at an optimum communication speed according to an operation state of a CPU is realized, and an unnecessarily high communication speed is used. There is an effect that it is possible to use the battery which is a finite resource of the wireless communication device (portable wireless terminal device) according to the quality of the wireless line by preventing the operation of the wireless communication device.

According to the wireless communication apparatus of the present invention, since the wireless communication corresponding to the narrow band CDMA mobile communication system is performed, the following effects can be obtained. A wireless communication device that performs wireless communication corresponding to a narrowband CDMA mobile communication system realizes a data communication / voice communication service at an optimum communication speed according to an operation state of a CPU and an unnecessarily high communication speed. The wireless communication device (portable wireless terminal device) has an effect that the battery, which is a finite resource, can be used according to the quality of the wireless channel.

According to the communication speed control method of the present invention, a communication speed control method applied to a wireless communication device having a CPU for wireless communication processing, wherein the CPU
Since the method includes the operation rate detection step of detecting the operation rate of the communication and the communication rate control step of determining the communication rate based on the operation rate detected in the operation rate detection step, the following effects are obtained. By detecting the operation rate of the CPU and determining the communication speed based on the detected operation rate, the data communication / voice communication service at the optimum communication speed according to the operation state of the CPU can be realized, and unnecessarily high speed. There is an effect that it is possible to prevent operation at a high communication speed and use a battery, which is a finite resource of a wireless communication device (a wireless communication device such as a portable wireless terminal device), in accordance with the quality of the wireless line.

According to the communication speed control method of the present invention, in the operating rate detecting step, the operating rate of the CPU is detected based on the number of executions of the valid instruction and the number of received frames. Effect. By detecting the CPU operation rate based on the number of executions of the valid instruction and the number of received frames, and determining the communication speed based on the detected operation rate, data communication / voice at an optimum communication speed according to the operation state of the CPU is performed. In addition to realizing communication services, it prevents unnecessary operation at high communication speeds and reduces the battery, which is a finite resource of wireless communication devices (wireless communication devices such as portable wireless terminal devices), according to the quality of the wireless line. There is an effect that can be used.

According to the communication speed control method of the present invention, in the operation rate detecting step, the CPU operates the CPU based on the number of executions of a valid instruction for accessing a work area of transmission / reception data processing and the number of received frames. Since the rate is detected, the following effects are obtained. The operation rate of the CPU is detected based on the number of executions of the valid command and the number of received frames for accessing the work area of the transmission / reception data processing, and the communication speed is determined based on the detected operation rate. Realizing data communication / voice communication service at high communication speed and preventing operation at unnecessarily high communication speed by using limited resources of wireless communication devices (wireless communication devices such as portable wireless terminal devices). There is an effect that a certain battery can be used according to the quality of the wireless line.

According to a twelfth aspect of the present invention, in the operation rate detecting step, the operation rate of the CPU is determined based on the number of executions of a valid instruction for accessing an input / output address of transmission / reception data and the number of received frames. Since the rate is detected, the following effects are obtained. The operating rate of the CPU is detected based on the number of executions of the valid instruction for accessing the input / output address of the transmission / reception data and the number of received frames, and the communication speed is determined based on the detected operating rate. Realizing data communication / voice communication service at high communication speed and preventing operation at unnecessarily high communication speed by using limited resources of wireless communication devices (wireless communication devices such as portable wireless terminal devices). There is an effect that a certain battery can be used according to the quality of the wireless line.

According to the communication speed control method of the present invention, in the communication speed control step, a communication speed is selected from a communication speed selection table based on the operation ratio detected in the operation ratio detection step. The following effects are obtained. By selecting the communication speed from the communication speed selection table based on the operation rate of the CPU, the data communication / voice communication service at the optimum communication speed according to the operation state of the CPU is realized, and the communication speed is unnecessarily high. In this case, there is an effect that a battery, which is a finite resource of a wireless communication device (a wireless communication device such as a portable wireless terminal device), can be used in accordance with the quality of a wireless communication line.

According to the communication speed control method of the present invention, in the communication speed control step, the communication speed is continuously varied based on the operation rate detected in the operation rate detection step. It has the following effects. CPU
By continuously changing the communication speed based on the operating rate of
A data communication / voice communication service at an optimum communication speed according to the operation state of the CPU is realized, and an operation at an unnecessarily high communication speed is prevented to prevent a wireless communication device (a wireless communication device such as a portable wireless terminal device). There is an effect that a battery, which is a finite resource of the communication device), can be used according to the quality of the wireless channel.

According to the communication speed control method of the present invention, the present invention can be applied to a wireless communication apparatus that performs wireless communication corresponding to a wideband CDMA mobile communication system, and has the following effects. In a wireless communication device that performs wireless communication corresponding to a broadband CDMA mobile communication system, a data communication / voice communication service at an optimum communication speed according to an operation state of a CPU is realized, and an unnecessarily high communication speed is used. There is an effect that it is possible to use the battery which is a finite resource of the wireless communication device (portable wireless terminal device) according to the quality of the wireless line by preventing the operation of the wireless communication device.

According to the communication speed control method of the present invention, the present invention can be applied to a wireless communication device that performs wireless communication corresponding to a narrowband CDMA mobile communication system, and has the following effects. . A wireless communication device that performs wireless communication corresponding to a narrowband CDMA mobile communication system realizes a data communication / voice communication service at an optimum communication speed according to an operation state of a CPU and an unnecessarily high communication speed. The wireless communication device (portable wireless terminal device) has an effect that the battery, which is a finite resource, can be used according to the quality of the wireless channel.

According to the storage medium of the present invention, a computer-readable storage medium storing a program for executing a communication speed control method applied to a wireless communication apparatus having a CPU for wireless communication processing. The communication speed control method includes an operation ratio detection step of detecting an operation ratio of the CPU, and a communication speed control step of determining a communication speed based on the operation ratio detected in the operation ratio detection step. The following effects are obtained.
By detecting the operation rate of the CPU and determining the communication speed based on the detected operation rate, the data communication / voice communication service at the optimum communication speed according to the operation state of the CPU can be realized, and unnecessarily high speed. Wireless communication device (wireless communication device such as portable wireless terminal device) by preventing operation at a high communication speed
There is an effect that the battery, which is a finite resource, can be used according to the quality of the wireless channel.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of a variable communication speed wireless communication terminal device of a W-CDMA mobile communication system according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a configuration of a W-CDMA mobile communication system according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an information format of a broadcast signal of the W-CDMA mobile communication system according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a communication speed selection process in a variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a communication speed selection process in the variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an information format of a broadcast signal in the W-CDMA mobile communication system according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a communication speed selection table in the variable communication speed wireless communication terminal device of the W-CDMA mobile communication system according to the embodiment of the present invention.

[Explanation of symbols]

 15 control unit 152 communication speed selection means 153 CPU operation rate detection means 153a valid instruction execution counter 153b received frame counter

Claims (17)

[Claims] 1. A wireless communication device having a CPU for wireless communication processing, comprising: an operating rate detecting means for detecting an operating rate of the CPU; and determining a communication speed based on the operating rate detected by the operating rate detecting means. A wireless communication device comprising: 2. The wireless communication apparatus according to claim 1, wherein the operating rate detection unit detects the operating rate of the CPU based on the number of executions of the valid command and the number of received frames. 3. The operating rate detecting means according to claim 2, wherein the operating rate detecting means detects the operating rate of the CPU based on the number of executions of a valid instruction for accessing a work area for transmission / reception data processing and the number of received frames. Wireless communication device. 4. The operation rate detection unit according to claim 2, wherein the operation rate detection unit detects the operation rate of the CPU based on the number of executions of a valid instruction for accessing an input / output address of transmission / reception data and the number of received frames. Wireless communication device. 5. The communication speed control unit according to claim 1, wherein the communication speed control unit selects a communication speed from a communication speed selection table based on an operation rate detected by the operation ratio detection unit. Wireless communication device. 6. The wireless communication according to claim 1, wherein said communication speed control means continuously varies a communication speed based on an operation rate detected by said operation rate detection means. apparatus. 7. The wireless communication apparatus according to claim 1, wherein wireless communication corresponding to a broadband CDMA mobile communication system is performed. 8. The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus performs wireless communication corresponding to a narrowband CDMA mobile communication system. 9. A communication speed control method applied to a wireless communication device having a CPU for wireless communication processing, comprising: an operating ratio detecting step of detecting an operating ratio of the CPU;
A communication speed control step of determining a communication speed based on the operation ratio detected in the operation ratio detection step. 10. The communication speed control method according to claim 9, wherein in the operation rate detecting step, the operation rate of the CPU is detected based on the number of times of execution of the valid instruction and the number of received frames. 11. The operating ratio detecting step according to claim 10, wherein, in the operating ratio detecting step, the operating ratio of the CPU is detected based on the number of executions of a valid instruction for accessing a work area of transmission / reception data processing and the number of received frames. Communication speed control method. 12. The operating ratio detecting step according to claim 10, wherein in the operating ratio detecting step, the operating ratio of the CPU is detected based on the number of executions of a valid instruction for accessing an input / output address of transmission / reception data and the number of received frames. Communication speed control method. 13. The communication speed control step according to claim 9, wherein a communication speed is selected from a communication speed selection table based on an operation rate detected in the operation rate detection step. Communication speed control method. 14. The communication speed control step, wherein the communication speed is continuously varied based on the operation rate detected in the operation rate detection step.
Communication speed control method according to any one of the above. 15. The communication speed control method according to claim 9, wherein the communication speed control method is applicable to a wireless communication device that performs wireless communication corresponding to a broadband CDMA mobile communication system. 16. The communication speed control method according to claim 9, wherein the communication speed control method is applicable to a wireless communication device that performs wireless communication corresponding to a narrowband CDMA mobile communication system. 17. A storage medium readable by a computer storing a program for executing a communication speed control method applied to a wireless communication device having a CPU for wireless communication processing, wherein the communication speed control method includes: A storage medium comprising: an operation rate detection step of detecting an operation rate of a CPU; and a communication speed control step of determining a communication speed based on the operation rate detected in the operation rate detection step.