JP2000032561A - Radio communication equipment, communication control method and storage medium thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication equipment by which troublesome selection of a maximum transmission rate and revision operations by the user are avoided when dialing. SOLUTION: This radio communication equipment 11 uses a speed information reception section 37 to receive speed information from a speed detection section of a moving automobile and compares mobile speed data received this time with mobile speed data received precedingly to discriminate whether or not the speed is changed. When the radio communication equipment 11 discriminates that the speed has changed, the equipment 11 obtains an updated mobile speed V', compares it with a preceding mobile speed V analyzes a maximum transmission rate corresponding to the mobile speed of the radio communication equipment 11, and stores information denoting the maximum transmission rate possible for communication in the case of dialing to a storage area section 36. A control section 35 receiving a radio channel connection request from a communication application 34 in the case of dialing sends the information of the maximum transmission rate possible for communication stored in the storage area section 36 to the radio base station to set up a call.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication apparatus, a communication control method, and a radio communication apparatus accommodated in a radio communication system in which the communication speed of a radio line can be selected from a plurality of specified values before or after the start of communication. It relates to a storage medium.

In addition, the communication speed of the wireless line can be selected from a plurality of specified values regardless of before or after the start of communication.
The present invention relates to a wireless communication device, a communication control method, and a storage medium accommodated in a wireless communication system that requires a higher communication speed for a wireless communication line having a higher communication speed than a wireless communication line for a lower communication speed.

[0003]

2. Description of the Related Art In recent years, personalization of wireless communication devices has advanced, and it is not uncommon for individuals to own mobile phones and the like. In addition, the wireless system has been mainly of the analog type, but has recently been shifted to the digital type which is excellent in speech quality and privacy.

One of the digital wireless telephone terminal services is a personal handyphone system (hereinafter, referred to as a personal handyphone system).
PHS). In the PHS call receiving service, a location can be registered in any one of a plurality of base stations arranged at an appropriate place outdoors so that a call can be received anywhere within the area of the base station.

[0005] In addition, these wireless communication devices having excellent portability can be used in mobiles such as cars and trains, as long as location registration with a base station is possible.

Following such PHS, mobile communication of the wideband code division multiple access (W-CDMA) system is being standardized as next-generation mobile communication. This W-CDM
In the A-type mobile communication, a maximum transmission rate is specified in advance for the state of the wireless communication device because the communication line quality required for the wireless line varies depending on the state of the wireless communication device (such as high-speed movement). The maximum transmission speed can be selected and changed regardless of before or during communication.

[0007] Further, the fee system relating to the maximum usable transmission rate in each state of the wireless communication apparatus is proportional to the communication rate, and the higher the communication rate and the wider the bandwidth, the higher the communication cost.

On the other hand, a conventional wireless communication system (PD)
C (Personal Digital Cellular System), PH
S, etc.), the idea is that the received electric field strength on the base station side should exceed the reference value. Therefore, there is no means for controlling the transmission output on the wireless communication terminal side.

[0009]

However, in the above-mentioned mobile communication, the required radio channel quality changes according to the state of the radio communication apparatus, that is, the change in the moving speed.
Therefore, when it is predicted that the radio channel quality is degraded due to a change in the moving speed of the radio communication device, the communication speed between the radio communication device and the radio base station is changed to maintain the communication, and the radio channel quality is reduced. Need to be retained.

In this case, a method of selecting the maximum transmission speed by the operator himself is conceivable, but it is difficult to easily know the moving speed of the moving wireless communication device, and when the optimum transmission speed cannot be selected. Is not connected at the time of calling and a call loss occurs.

[0011] Even if it is known, the operation of selecting the optimum transmission speed becomes complicated, and especially the operator who is driving is distracted by the operation of the wireless communication device, and the operation is sparse. It is also expected that a serious traffic accident will be caused by the adverse effect.

[0012] Further, if communication is continued at an inappropriate maximum transmission rate on a radio line having deteriorated quality, various problems have been considered such that it is uneconomical from the viewpoint of communication cost.

On the other hand, in the mobile communication of the W-CDMA system, required communication line quality differs depending on the communication speed provided by the radio line, and the selection of the communication speed is performed before or during communication. In the case of a wireless communication system that can be performed without using a wireless communication terminal, it is necessary to increase the transmission output on the wireless communication terminal device side, and the operable time of the portable wireless communication terminal device driven by a finite power source (battery) is required. There was a problem of shortening.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless communication apparatus, a communication control method, and a storage medium which can avoid a complicated operation of selecting and changing a maximum transmission speed by a user at the time of calling.

Also, the present invention provides a portable wireless communication terminal by receiving speed information of a mobile wireless communication terminal moving from a speedometer of a vehicle and determining and changing a data communication speed based on the speed information. Another object of the present invention is to provide a wireless communication device, a communication control method, and a storage medium capable of minimizing a reduction in the operable time of a terminal device.

[0016]

In order to achieve the above object, a wireless communication apparatus according to a first aspect of the present invention is a wireless communication apparatus having communication means for performing communication via a wireless line. Based on the moving speed at which the communication device moves,
A communication speed control means for controlling a communication speed of the wireless line is provided.

According to a second aspect of the present invention, in the wireless communication apparatus according to the first aspect, 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; The present invention is applied to a wireless communication system capable of making a wireless connection with the wireless base station in the service zone.

According to a third aspect of the present invention, in the wireless communication apparatus according to the first aspect, the communication speed of the wireless line formed at the time of wireless connection is determined from a plurality of specified values before and after the start of communication. It is characterized in that it can be selected and changed regardless of later.

According to a fourth aspect of the present invention, in the wireless communication apparatus according to the second aspect, the wireless communication apparatus is mounted on a moving body moving in the service zone, and the moving body detects a moving speed of the moving body. And output means for outputting the detected moving speed, wherein the communication speed control means includes receiving means for receiving the output moving speed, and based on the received moving speed, The communication speed is controlled.

In the wireless communication device according to the fifth aspect, in the wireless communication device according to the first aspect, the communication speed control means determines that the moving speed has increased from the time when the communication speed was previously determined. In this case, the communication speed of the currently used wireless line is reduced.

According to a sixth aspect of the present invention, in the wireless communication apparatus according to the first aspect, the communication speed control means determines that the moving speed has decreased since the previous time when the communication speed was determined. In this case, the communication speed of the currently used wireless channel is increased.

According to a seventh aspect of the present invention, in the communication control method for controlling a communication speed of a wireless communication device, the communication speed is determined in accordance with a moving speed of the wireless communication device. The wireless communication is performed at a speed.

The storage medium according to claim 8 is a storage medium that is executed by a CPU mounted on a wireless communication device and stores a program module in which a processing procedure for controlling a communication speed of the wireless communication device is described. A program module for determining a moving speed at which the wireless communication device moves, and a program module for determining the communication speed according to the determined moving speed are provided.

According to a ninth aspect of the present invention, in the wireless communication apparatus having communication means for performing communication via a wireless line, the communication speed of the wireless communication apparatus is determined based on a moving speed at which the wireless communication apparatus moves. And control means for controlling at least one of the transmission output.

According to a tenth aspect of the present invention, there is provided the wireless communication apparatus according to the first or ninth aspect, wherein the wireless communication apparatus is mounted on a moving body, and exchanges information on a moving speed with a speed detecting means provided on the moving body. Is performed.

A wireless communication device according to an eleventh aspect of the present invention includes a communication speed storage unit for storing a required communication speed in the wireless communication device according to the ninth aspect, and the control unit realizes the required communication speed. Therefore, the transmission output is changed based on the moving speed.

A wireless communication apparatus according to a twelfth aspect of the present invention includes a transmittable output storage means for storing a transmit output usable in the wireless communication apparatus according to the ninth aspect, wherein the control means controls the available transmit output. In order to realize the above, the communication speed is changed based on the moving speed.

According to a thirteenth aspect of the present invention, in the wireless communication apparatus according to the ninth aspect, the control means controls at least one of the communication speed and the transmission output before connecting the wireless line. Features.

According to a fourteenth aspect of the present invention, in the wireless communication apparatus according to the ninth aspect, the control means controls at least one of the communication speed and the transmission output during connection of the wireless line. Features.

A wireless communication method according to claim 15 is a communication control method for controlling a communication speed of a wireless communication device,
The communication speed and the transmission output are determined according to the moving speed of the wireless communication device, and wireless communication is performed at the determined communication speed and transmission output.

A storage medium according to a sixteenth aspect is a storage medium that is executed by a CPU mounted on a wireless communication device and stores a program module in which a processing procedure for controlling a communication speed and a transmission output of the wireless communication device is described. The medium is characterized by comprising a program module for determining a moving speed at which the wireless communication device moves, and a program module for determining the communication speed and the transmission output according to the determined moving speed.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a wireless communication apparatus, a communication control method and a storage medium according to the present invention will be described.

[First Embodiment] The wireless communication device of the first embodiment is applied to a portable wireless communication terminal device used in a wideband CDMA (W-CDMA) mobile communication system.

FIG. 1 is a diagram conceptually showing a configuration of a W-CDMA mobile communication system. In the figure, reference numeral 11 denotes a wireless communication device (wireless communication terminal device). Reference numeral 12 denotes a wireless base station that controls connection between a wireless communication line and a wired communication line. Reference numeral 15 denotes an automobile as a moving body, and reference numeral 16 denotes a speed detection unit that measures a moving speed of the automobile 15.

The wireless communication device 11 is detachably connected to the speed detecting section 16. Note that the speed detection unit 16 may be built in the wireless communication device 11.

Reference numeral 13 denotes a wired line connected to the radio base station 12 and an existing communication network 14 (ISDN, ATM (Asynchrono).
us. Transfer Mode), LAN, etc., and routes a communication path with the wireless communication device 11. Reference numeral 10 denotes a communication carrier to which each wireless base station 12 constantly provides a service, and a wireless base station 1 as a signal transmission source.
This is a notification signal transmitted as information essential for system control, such as the identification information of No. 2.

FIG. 2 is a diagram showing an information format of a broadcast signal 10 in a W-CDMA mobile communication system. The broadcast signal is transmitted using two wireless frames 27 and, when decoded on the wireless communication device 11 side, 21 to 26
Is read out.

In the figure, 21 is broadcast signal identification information indicating the type of broadcast signal, 22 is the transmission power of the base station of the broadcast signal, 23 is the information frame number added cyclically, and 24 is the base station of the broadcast signal. Interference information on the receiving side of the station,
Reference numeral 25 denotes an information element detail area for transmitting various information required for system control such as identification information of a communication carrier or a radio base station, and 26 denotes an error correction code for detecting and correcting a decoding error.

FIG. 3 is a block diagram showing a functional configuration of the wireless communication device 11. In the figure, 31 is a radio unit for transmitting and receiving radio waves, 32 is a baseband processing unit for modulating and demodulating, 33 is a frame disassembling and assembling unit for disassembling and assembling transmitted and received data in frame units, 34 is various communication applications, and 35 is A control unit for controlling wireless communication and communication applications; 36, a storage area for storing various wireless base station information and the like; 37, speed information for the speed detector 16;
This is a speed information receiving unit that receives from the user.

The control unit 35 includes a CPU, a ROM, a RAM (not shown), and the like, and a program module (see FIG. 11A) described later stored in the ROM is executed by the CPU in the same control unit. Is done.

FIG. 4 is a flowchart showing a procedure for updating the wireless base station information when the wireless communication apparatus 11 is idle. FIG. 5 is a diagram showing the correspondence between the moving speed of the wireless communication device 11 and the maximum selectable transmission speed.

In the figure, the item indicated by 61 is the moving speed of the wireless communication device 11 measured by the speed detecting unit 16,
The item indicated by 62 is the maximum communicable transmission speed (maximum communication speed) corresponding to the moving speed 61.

After the power is turned on, the radio communication apparatus 11 belongs to the service area of an arbitrary radio base station 12, and starts the following information update processing. When receiving the broadcast signal 10 that the wireless base station 12 to be connected is transmitting constantly, the validity of the broadcast signal received by the operation using the error correction code 26 is determined, and when there is an error in the reception, It is determined whether or not the error has occurred a specified number of times in a row. If the error is within the specified number of times,
The notification signal is received again, and if the number of times has reached the specified number, the line setting disabled status is set, and the connection process is terminated. If the line setting disabled status is set, it is determined that the quality of the wireless line is poor, and the wireless line connection sequence is not started.

On the other hand, if there is no error in the reception, the broadcast signal 1
From 0, various information (broadcast signal identification information 21 to information element detail area 25) is read and analyzed. From these pieces of information, a change in the radio base station (cell station: CS) identifier for identifying each radio base station 12 is confirmed, and if there is no change, the information update processing is ended.

Thereafter, the control unit 35 of the wireless communication device 11
Receives the speed information (moving speed data) from the speed detecting unit 16 of the moving vehicle 15 by the speed information receiving unit 37 (step S401). The traveling speed data received this time and the traveling speed data received last time are compared to determine whether or not the speed has changed (step S402).

If it is determined that the speed has not changed,
By ending the process once and executing this process again, it is possible to receive speed information at a preset time interval (step S401) and periodically determine a change in speed.

On the other hand, if it is determined that the moving speed has changed compared to the previous moving speed V, the updated moving speed V 'is obtained (step S403), and the wireless communication is performed using the correspondence table shown in FIG. The maximum transmission speed corresponding to the moving speed 61 of the communication device 11 is analyzed (step S404), and information on the maximum transmission speed at which communication is possible at the time of transmission is stored in the storage area unit 36 (step S405).

When the radio communication device 11 originates a call, the control unit 35 that has received a radio line connection request from the communication application 34 transmits information on the maximum communicable transmission speed stored in the storage area unit 36 during the connection sequence. As a part of a predetermined information element such as a call setup request message, the radio base station 1
2 to establish a call.

[Second Embodiment] In the first embodiment, the method of selecting the maximum communication speed at the time of transmission by the wireless communication device 11 has been described. In the second embodiment, the maximum communication speed during communication is determined. Shows the selection method. The configurations of the mobile communication system and the wireless communication device are the same as in the first embodiment.

FIG. 6 is a flowchart showing a procedure for updating the wireless base station information and controlling the communication speed during the communication of the wireless communication apparatus 11 in the second embodiment.
Note that the same step processes as those in the first embodiment are denoted by the same step numbers.

The radio communication apparatus 11 belongs to a service area of an arbitrary radio base station 12 even during communication, similarly to the idle state, and starts the following information update processing.

When receiving the broadcast signal 10 steadily transmitted by the wireless base station 12 to be connected, the error correction code 26
Is used to determine the validity of the received broadcast signal, and if there is an error in the reception, it is determined whether or not the error has occurred a specified number of consecutive times. When there is no error in reception, various information (broadcast signal identification information 21 to information element detailed area 25) is read from the broadcast signal 10 and analyzed.

A radio base station (cell station: C) for identifying an individual radio base station 12 from these pieces of information.
S) Check for a change in the identifier, and if there is no change, end the information update process.

Thereafter, the control unit 35 of the radio communication device 11
Receives the speed information from the speed detector 16 of the moving vehicle 15 by the speed information receiver 37 (step S4).
01), the presence / absence of a change is determined by comparing the traveling speed data received this time with the traveling speed data received last time (step S402). If there is no change, it is possible to periodically determine the change in speed by terminating the process and receiving speed information at preset time intervals (step S401).

On the other hand, if it is determined that the moving speed has changed compared to the previous moving speed V, an updated moving speed V 'is obtained (step S403), and the correspondence table shown in FIG. Then, the maximum transmission speed corresponding to the moving speed 61 of the wireless communication device 11 is analyzed (step S404), and information on the maximum communicable transmission speed is stored in the storage area unit 36 (step S405).

Further, the control unit 35 determines the magnitude of the updated moving speed V 'and the previously detected moving speed V (steps S406 and S407). It is determined that the moving speed has decreased, and the information on the maximum communicable transmission speed stored in the storage area unit 36 is transmitted to the wireless base station 12 as a part of a predetermined information element such as a communication speed change request message, A communication speed increase (bandwidth expansion) process is executed (step S409).

On the other hand, if V <V ', the wireless communication device 11
And transmits the information on the maximum communicable transmission speed stored in the storage area unit 36 to the wireless base station 12 as a part of a predetermined information element such as a communication speed change request message. Then, a communication speed reduction (bandwidth reduction) process is executed (step S408). If V = V 'and there is no change in the moving speed, the current communication speed is maintained without executing the communication speed control process.

In the first and second embodiments,
As a wireless communication device in which the communication speed can be selected from a plurality of predetermined values and the maximum transmission speed (transmission band) decreases as the moving speed of the wireless communication device increases, wideband C
Although a portable wireless communication device for a DMA (W-CDMA) mobile communication system is shown, the communication speed in a portable wireless communication device of a system (such as a narrow band CDMA mobile communication system) using another similar communication medium is shown. The present invention can be similarly applied to the selection / change processing of.

The speed detecting section 16 of the automobile 15 measures the moving speed by using an acceleration sensor, or detects a GPS (Gl).
The moving speed may be calculated or detected by a means that can measure the moving body itself, such as information from an obal positioning system.

Third Embodiment FIG. 7 is a diagram conceptually showing a configuration of a wideband CDMA (W-CDMA) mobile communication system according to a third embodiment. In the figure, 11
Reference numeral 1 denotes a variable communication speed wireless communication terminal device.

A speedometer 110 measures the speed of a vehicle on which the wireless communication terminal device 111 is mounted.
Reference numeral 3 denotes a wireless base station that controls connection between a wireless communication line and a wired communication line.

Reference numeral 114 denotes a wired line connected to the wireless base station 113 and an existing communication network (ISDN 115, ATM 11).
6, LAN 117, etc.)
1 is a wireless control device that routes a communication path between the wireless communication device 1 and the communication device 1. Reference numeral 112 denotes a notification signal transmitted as information essential for system control, such as a communication carrier to which each wireless base station 113 constantly provides a service and identification information of the wireless base station 113 as a signal transmission source.

As shown in FIG. 2, the notification signal is 2
It is transmitted using one wireless frame 27, decoded on the wireless communication terminal device 111 side, and the contents indicated by 21 to 26 are read.

As described above, 21 indicates information indicating the type of the broadcast signal, 22 indicates the transmission power of the source base station of the broadcast signal 21, 23 indicates the information frame number added cyclically, and 24 indicates the source base station. Interference information on the receiving side of the station, 25
Is an information element detailed area for transmitting identification information of communication carriers and wireless base stations and various information necessary for system control.
Reference numeral 6 denotes an error correction code for detecting and correcting an error in decoding.

FIG. 8 is a block diagram showing a functional configuration of a variable communication speed wireless communication terminal device. In the figure, 13
Reference numeral 1 denotes a radio unit for transmitting and receiving radio waves; 132, a baseband processing unit for modulation and demodulation; 133, a frame disassembly / assembly unit for disassembly / assembly of transmission / reception data in frame units;
Is a control unit that controls wireless communication and communication applications, and 136 is a setting information storage unit that stores various setting values (maximum transmission output value, essential communication speed) and constants for various calculations. It is.

The control unit 135 includes a CPU, a ROM, and a RAM.
(Not shown), and a program module (FIG. 11B) described later stored in the ROM.
Is executed by the CPU in the same control unit.

FIG. 9 is a flowchart showing a processing procedure for selecting a communication speed and a transmittable output required on a wireless line when setting up a wireless line (before connecting to a wireless line) by a trigger from the variable speed wireless terminal device. It is.

The control unit 135, which has received the wireless line connection request from the communication application or the like, starts this processing before starting the wireless line connection sequence.

First, the speed at which the wireless communication terminal 111 is currently moving is read from the information from the speedometer 110 (step S60).
1). Based on the speed information, it is determined whether a required communication speed is set in advance (step S60).
2).

If the required communication speed is set in advance, a transmission output required to realize the communication speed is selected (step S603). For example, step S
If the speed read in 601 is increasing, the transmission output is increased without decreasing the required communication speed set in advance. As a result, the area where radio waves can reach is expanded without deteriorating the quality of the radio channel, and a handover involving a change in the base station does not need to be performed. After this,
The process ends.

On the other hand, if the required communication speed is not set in advance in step S602, it is determined whether the transmittable output is set in advance (step S602).
604). If the transmittable output is set in advance, the communication speed required to realize the transmit output is selected (step S605). For example, step S60
If the speed read in step 1 is increasing, the communication speed is reduced without increasing the preset transmission output. Thereby, the operation time of the wireless communication terminal device driven by the battery can be extended without deteriorating the quality of the wireless channel. Thereafter, the process ends.

On the other hand, when neither the communication speed nor the transmittable output is set in advance, both the communication speed and the transmittable output are selected according to the speed, and the process is terminated. At this time, one of the communication speed and the transmittable output may be preferentially selected.

After that, the connection sequence of the wireless line is started under the communication conditions selected in this processing. By storing the required communication speed or transmittable output in the setting information storage unit 136 in this manner, a communication service according to the form of the communication application is realized, and the limited resources of the portable wireless communication terminal device are used. It is possible to appropriately use a certain battery according to the user's intention and the form of the communication service.

[Fourth Embodiment] In the third embodiment, the case where the setting condition is referred to before the connection of the wireless communication line is described. However, in the fourth embodiment, the setting condition is referred to during the connection of the wireless communication line. The case where the communication speed and the transmission output are controlled will be described.

FIG. 10 is a flowchart showing a processing procedure for selecting a communication speed and a transmission output to be requested on a radio line during a radio line connection by a trigger from the variable speed type wireless terminal device in the fourth embodiment.

The control unit 135 of the wireless communication terminal device constantly monitors the speed information from the speedometer 110 during the connection to the wireless line (step S701), and uses the speed information from the speedometer 110 to output the communication speed and transmission output. It is determined whether the setting needs to be changed (step S7).
02).

If it is determined that it is necessary to change the communication speed / transmittable output setting, it is determined whether the required communication speed is set in advance (step S70).
3).

If the required communication speed is set in advance, a transmission output necessary to realize the communication speed is selected (step S704). For example, step S
If the speed read in 701 is increasing, the transmission output is increased without reducing the required communication speed set in advance. Thus, without deteriorating the quality of the wireless channel, the area where radio waves can reach is widened, and it is not necessary to perform a handover involving a change in the base station.

On the other hand, if the required communication speed is not set in advance, it is determined whether or not the transmittable output is set in advance (step S706). If the transmittable output is set in advance, a settable communication speed is selected within the range of the transmittable output (step S707). For example, if the speed read in step S701 is increasing, the communication speed is reduced without increasing the preset transmittable output. Thus, the operation time of the wireless communication terminal device driven by the battery can be extended without deteriorating the quality of the wireless line.

On the other hand, when neither the communication speed nor the transmittable output is set in advance, both the communication speed and the transmission output are selected according to the speed, and the process is terminated. At this time, one of the communication speed and the transmission output may be preferentially selected.

Thereafter, a process for changing the communication speed / transmission output, that is, a handover process for the same base station is started (step 705), and the process is terminated.

In the above embodiment, the case where the speed information from the speedometer is read by wire is shown. However, the case where the speed information is read by using wireless transmission means such as wireless communication or optical communication can be similarly applied. It is.

Further, it goes without saying that the present invention can also be applied to a case where the present invention is achieved by supplying a program to a wireless communication terminal device (wireless communication device). In this case, the effect of the present invention can be enjoyed by the wireless communication terminal device (wireless communication device) reading out a storage medium storing a program represented by software for achieving the present invention.

FIG. 11 is a diagram showing a memory map of the ROM in the control units 35 and 135 which are storage media storing the program modules. FIG. 3A shows the first and second sections.
8 shows the contents of a ROM in a control unit 35 in the embodiment. The ROM stores a moving speed calculation module and a communication speed determination module which are update processing programs of the wireless base station information shown in FIGS. FIG. 7B shows a control unit 1 according to the third and fourth embodiments.
35 shows the contents of the ROM in 35. The ROM stores a moving speed calculation module and a communication speed / transmission output determination module which are processing programs for selecting a communication speed and a transmission output required by the wireless line shown in FIGS.

The storage medium is not limited to a ROM, but may be a nonvolatile memory card, an IC card, or the like.

[0086]

According to the wireless communication device of the first aspect of the present invention, when communication is performed via a wireless line by the communication means, the communication speed control means is based on the moving speed at which the wireless communication device moves. Thus, the communication speed of the wireless line is controlled, so that it is possible to avoid a complicated selection / change operation of the maximum transmission speed by the user at the time of calling.

For example, in a wireless communication system, a wireless communication device moving within a service zone in order to maintain the wireless channel quality between the wireless communication device and the wireless base station in accordance with a change in its state (moving speed). Based on the moving speed information from a speed measuring device of a moving body (for example, a car), the moving speed of the wireless communication device itself is determined, and the maximum transmission speed is automatically selected and changed, so that the transmission speed can be reduced. A complicated selection / change operation of the maximum transmission speed by the user can be avoided.

Further, since the optimum communication speed is selected before the start of the calling procedure, the processing time due to negotiation in the connection procedure can be shortened, and as a result, a call loss can be avoided.

Further, during communication, quality deterioration of the radio line can be prevented, and a stable communication state can be maintained. Further, continuation of communication at an inappropriate maximum transmission rate with respect to the state of the wireless communication device can be avoided, and communication costs can be reduced.

The wireless communication device according to claim 2 to claim 4, the wireless communication method according to claim 7, and the claim 8
The same effect can be obtained in the storage medium described in (1).

According to the wireless communication apparatus of the fifth aspect,
When it is determined that the moving speed has increased since the last time the communication speed was determined, the communication speed control means reduces the communication speed of the currently used wireless line. Can be avoided.

[0092] According to the wireless communication apparatus of the sixth aspect,
The communication speed controller increases the communication speed of the currently used wireless line when it is determined that the moving speed has decreased from the time when the communication speed was previously determined. be able to.

[0093] According to the wireless communication device of the ninth aspect,
When communication is performed via a wireless line by the communication unit, the control unit controls at least one of the communication speed and the transmission output of the wireless communication device based on the moving speed at which the wireless communication device moves. Alternatively, at least one of them can be changed according to the moving speed in accordance with the available transmission output. Therefore, it is possible to minimize the operable time of the portable wireless communication terminal device to the minimum necessary by effectively using the battery. For example, the portable wireless communication terminal receives speed information moving from a speedometer of a vehicle, and determines and changes the data communication speed based on the speed information to thereby determine the operable time of the portable wireless communication terminal. Shortening can be minimized. The same effect can be obtained in the wireless communication method described in claim 15 and the storage medium described in claim 16.

According to the wireless communication apparatus of the tenth aspect, since information on the moving speed is exchanged with the speed detecting means provided on the moving body and mounted on the moving body, the apparatus is mounted on a car or a train. Can be used.

According to the wireless communication apparatus of the present invention, there is provided a communication speed storage means for storing a required communication speed, and the control means controls the transmission output to realize the required communication speed. Since the transmission speed is changed based on the moving speed, when the transmission output is increased by giving priority to the communication speed, the area where radio waves can reach can be expanded, and a handover involving a change of the base station can be avoided.

According to a twelfth aspect of the present invention, there is provided a wireless communication apparatus comprising transmittable output storage means for storing a usable transmit output, wherein the control means executes the transmittable output to realize the usable transmit output. Since the communication speed is changed based on the moving speed, the transmission output is prioritized, the battery is effectively used, and the shortening of the operable time of the portable wireless communication terminal device can be suppressed to a minimum.

According to the wireless communication apparatus of the present invention, since the control means controls at least one of the communication speed and the transmission output before the connection of the wireless line, the control means moves from before the connection of the wireless line. The transmission output can be selected according to the speed and the required communication speed.

According to the radio communication apparatus of the present invention, the control means controls at least one of the communication speed and the transmission output during the connection of the radio line. The transmission output can be selected according to the speed and the required communication speed.

[Brief description of the drawings]

FIG. 1 is a diagram conceptually showing a configuration of a W-CDMA mobile communication system.

FIG. 2 is a diagram showing an information format of a broadcast signal 10 in a W-CDMA mobile communication system.

FIG. 3 is a block diagram showing a functional configuration of the wireless communication device 11;

FIG. 4 is a flowchart illustrating a procedure for updating wireless base station information when the wireless communication device 11 is idle.

FIG. 5 is a diagram showing a correspondence relationship between a moving speed of the wireless communication device 11 and a maximum selectable transmission speed.

FIG. 6 is a flowchart illustrating a procedure of a process of updating wireless base station information and a process of controlling a communication speed during communication of the wireless communication apparatus 11 according to the second embodiment.

FIG. 7 shows a wideband CDMA (W-
FIG. 1 is a diagram conceptually illustrating a configuration of a CDMA (mobile communication system).

FIG. 8 is a block diagram illustrating a functional configuration of a variable communication speed wireless communication terminal device.

FIG. 9 is a flowchart showing a processing procedure for selecting a communication speed and a transmittable output required on a wireless line when setting a wireless line by a trigger from the variable speed wireless terminal device side (before connecting to the wireless line). .

FIG. 10 is a flowchart illustrating a processing procedure for selecting a communication speed and a transmittable output required on a wireless channel during a wireless channel connection by a trigger from the variable speed wireless terminal device according to the fourth embodiment.

FIG. 11 is a diagram showing a memory map of a ROM in the control units 35 and 135 which is a storage medium storing a program module.

[Explanation of symbols]

 11, 111 wireless communication device (wireless communication terminal device) 12, 113 wireless base station 13, 114 wireless control device 15 car 16 speed detecting unit 35, 135 control unit 36 storage area unit 37 speed information receiving unit 110 speed meter 136 setting information Memory

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mitsuru Watanabe 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term in Canon Inc. (reference) 5K067 AA34 AA35 BB03 BB04 CC10 DD11 DD19 EE02 EE10 EE16 EE41 GG08 HH22 HH23 KK13 KK15

Claims (16)

[Claims] 1. A wireless communication device having communication means for performing communication via a wireless line, comprising: a communication speed control means for controlling a communication speed of the wireless line based on a moving speed at which the wireless communication device moves. A wireless communication device characterized by the above-mentioned. 2. A service zone is formed by a plurality of radio cells constituted by a plurality of radio base stations connected to a wired communication network, and a radio connection with the radio base station can be performed within the service zone. The wireless communication device according to claim 1, wherein the wireless communication device is applied to a wireless communication system. 3. The communication speed of the wireless line formed at the time of wireless connection can be selected and changed from a plurality of specified values before or after the start of communication. A wireless communication device according to claim 1. 4. A moving body mounted in a moving body moving in the service zone, the moving body includes speed detecting means for detecting a moving speed of the moving body, and output means for outputting the detected moving speed. The wireless communication device according to claim 2, wherein the communication speed control unit includes a receiving unit that receives the output moving speed, and controls a communication speed of the wireless line based on the received moving speed. Communication device. 5. The communication speed control means, when it is determined that the moving speed has increased since the last time the communication speed was determined, decreases the communication speed of the currently used wireless line. The wireless communication device according to claim 1. 6. The communication speed control means increases the communication speed of a currently used wireless line when it is determined that the moving speed has decreased from the time when the communication speed was previously determined. The wireless communication device according to claim 1. 7. A communication control method for controlling a communication speed of a wireless communication device, comprising: determining the communication speed according to a moving speed of the wireless communication device; and performing wireless communication at the determined communication speed. Characteristic communication control method. 8. A storage medium which is executed by a CPU mounted on a wireless communication device and stores a program module in which a processing procedure for controlling a communication speed of the wireless communication device is described. A storage medium comprising: a program module for obtaining a speed; and a program module for determining the communication speed according to the obtained moving speed. 9. A wireless communication device having communication means for performing communication via a wireless line, wherein at least one of a communication speed and a transmission output of the wireless communication device is controlled based on a moving speed at which the wireless communication device moves. A wireless communication device comprising control means. 10. The wireless communication device according to claim 1, wherein the wireless communication device is mounted on a moving body and exchanges information about a moving speed with speed detecting means provided on the moving body. 11. A communication speed storage unit for storing a required communication speed, wherein the control unit changes the transmission output based on the moving speed in order to realize the required communication speed. The wireless communication device according to claim 9. 12. A transmission enable output storage unit for storing an available transmission output, wherein the control unit changes the communication speed based on the moving speed to realize the available transmission output. The wireless communication device according to claim 9, wherein: 13. The wireless communication apparatus according to claim 9, wherein the control unit controls at least one of the communication speed and the transmission output before connecting the wireless line. 14. The wireless communication apparatus according to claim 9, wherein said control means controls at least one of said communication speed and said transmission output during connection of said wireless line. 15. A communication control method for controlling a communication speed of a wireless communication device, wherein the communication speed and the transmission output are determined according to a moving speed of the wireless communication device, and the determined communication speed and transmission output are used. A communication control method for executing wireless communication. 16. A storage medium that stores a program module that is executed by a CPU mounted on a wireless communication device and describes a processing procedure for controlling a communication speed and a transmission output of the wireless communication device. A storage medium, comprising: a program module for determining a moving speed of movement; and a program module for determining the communication speed and the transmission output according to the determined moving speed.