JP4642622B2 - Wireless communication method, wireless communication system, wireless communication terminal, and base station - Google Patents

Description

  The present invention relates to a wireless communication method, a wireless communication system, a wireless communication terminal, and a base station that perform communication by switching between two different communication methods using one wireless unit.

There is known a hybrid wireless communication terminal capable of switching between two communication methods, ie, a 1xEVDO system dedicated to data communication and a cdma2000 1x system mainly using voice communication (see, for example, Patent Document 1). In such a wireless communication terminal, as shown in FIG. 4A, a paging channel in the cdma2000 1x system is received at a predetermined time interval (for example, every 5 seconds) even during data communication (1xEVDO). Therefore, it is possible to receive a voice call (cdma2000 1x), and during a voice call, the data communication (1xEVDO) is placed in a suspended state (temporary stop state) with a time limit.
JP 2003-298762 A

  However, in the prior art, as shown in FIG. 4B, when the voice call continues for a long time, the base station dormant timer (pause state time) in the 1xEVDO system is timed up and the data communication that has been on hold is not performed. It will be cut off. Here, the dormant timer is a timer that measures the time for which the communication line is temporarily suspended (hereinafter referred to as the suspension state time) without disconnecting the communication line. If the hibernation state exceeds the hibernation state time, the communication line is disconnected. For example, when paying data (streaming video or the like) is downloaded from a content server on the IP network by the 1xEVDO system, there is an incoming voice call in the cdma2000 1x system, and the data communication in the 1xEVDO system is put on hold and the cdma2000 1x If the voice call is performed for a long time, the dormant timer of the base station in the 1xEVDO system is timed up, and the data communication in the hold state is disconnected. In this case, there is a problem in that data being downloaded is invalidated even though charging required for the previous download occurs.

  The present invention has been made in consideration of such circumstances, and a wireless communication method, a wireless communication system, a wireless communication terminal, and a base capable of performing a long-time voice call while avoiding disconnection of data communication The purpose is to provide a station.

In order to solve the above-described problems, the following means were adopted.
A wireless communication method according to the present invention includes a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, the wireless communication terminal, and the first communication method. And a base station having a dormant timer for wireless connection in a wireless communication method , wherein the second communication method is used when the wireless communication terminal performs data communication of the first communication method. When voice communication is performed , data is transmitted to the base station in order to switch to the first communication method and reset the dormant timer set by the base station during the voice communication. It is characterized by.

A wireless communication system according to the present invention includes a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, the wireless communication terminal, and the first communication method. A wireless communication system comprising a base station having a dormant timer for wireless connection, wherein the wireless communication terminal performs voice communication in the second communication method during data communication in the first communication method. Doing, during the voice communication, and a switching control means for controlling to switch to the first communication system, when you switch to the first communication system by the switch control means, the base station is set and means for transmitting data to the base station in order to re-set the dormant timers, wherein the base station, when the data is received, the dormant timers are set Characterized in that it comprises means for setting.

A wireless communication system according to the present invention includes a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, the wireless communication terminal, and the first communication method. A base station that is wirelessly connected to the base station, wherein the base station controls the communication line not to be disconnected for a predetermined time when the wireless communication terminal is switched to the second communication method. A disconnect control means, wherein the wireless communication terminal performs control so as to switch to the first communication method when performing communication in the second communication method; and Requesting means for requesting the base station not to elapse the predetermined time when switching to the first communication method, the base station further, based on the request, Comprising a cutting time control means for controlling the cutting control means so that a constant time has not passed, the switching control means, the audio signal when the wireless communication terminal is communicating with the second communication method is silence Detecting means for detecting whether or not a state is present; and switching means for switching the communication method to the first communication method when a silent state is detected by the detecting means.

A wireless communication terminal according to the present invention is a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, and data communication of the first communication method. When voice communication is performed in the second communication system, switching control means for controlling to switch to the first communication system during the voice communication, and the first communication system by the switching control means When you switch to, characterized by comprising a means for transmitting data to the base station in order to re-set the dormant timers to the base station is set.

A wireless communication terminal according to the present invention is a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, and performs communication using the second communication method. When switching, the switching control means for controlling to switch to the first communication system, and when the switching control means switches to the first communication system, the wireless communication is established by the first communication system. Requesting means for requesting the base station not to pass a predetermined time until the communication line is disconnected, and the switching control means is configured such that the audio signal is silent when performing communication using the second communication method. Detecting means for detecting whether or not a state is present, and switching means for switching the communication method to the first communication method when a silent state is detected by the detecting means. .

The base station according to the present invention includes a dormant timer that wirelessly connects with a wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication with the first communication method. a base station having, during said data communication in the first communication method, wherein performs voice communication with the second communication method, during the voice communication, toggle its said wireless communication terminal to the first communication system When receiving data transmitted for resetting the dormant timer set by the base station, means for resetting the set dormant timer is provided.

  According to the present invention, it is possible to perform a long-time voice call while avoiding disconnection of data communication. Also, when the communication method of the wireless communication terminal is switched from the data communication method to the voice call method, for example, until the data communication method is temporarily switched during the silent period during the voice call and the communication line is disconnected to the base station Since the base station requests that the predetermined time does not elapse, and the base station performs control based on this request, it is possible to perform a long-time voice call while avoiding disconnection of data communication. It is done.

  Hereinafter, a hybrid wireless communication terminal (hereinafter referred to as a mobile terminal) according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram showing a configuration of a communication system using a mobile terminal according to an embodiment of the present invention. In FIG. 1, a hybrid portable terminal 1-1 has a function of performing communication by switching between a cdma2000 1x system related to voice communication and a 1xEVDO system related to data communication. The portable terminal 1-1 uses the Internet network (hereinafter referred to as an IP network) 3 via a base station (hereinafter referred to as 1xEVDO base station) 2 in the 1xEVDO system, and receives contents from the content server 4 on the IP network 3 , While using the telephone line network 6 via base stations (hereinafter referred to as cdma2000 1x base stations) 5-1 and 5-2 in the cdma2000 1x system, Incoming call from 2.

  Next, the configuration of the mobile terminal 1-1 shown in FIG. 1 will be described with reference to FIG. In FIG. 2, when the radio unit 12 detects a signal (for example, a pilot signal) for cdma2000 1x system or 1xEVDO system received by the antenna 11, the radio unit 12 notifies the control unit 13 of the detection. When the control unit 13 receives notification from the wireless unit 12 that a signal for the cdma2000 1x system has been detected, the control unit 13 controls the cdma2000 1x control unit 19 to be activated. In addition, when the control unit 13 receives notification from the wireless unit 12 that a signal for the 1xEVDO system has been detected, the control unit 13 controls the 1xEVDO control unit 20 to be activated.

  When the cdma2000 1x control unit 19 is activated by the control unit 13 that has been notified by the radio unit 12 that a signal for the cdma2000 1x system has been detected, the cdma2000 1x control unit 19 performs a voice outgoing / incoming process. The 1xEVDO control unit 20 performs packet data transmission / reception processing when activated by the control unit 13 that has received notification that the radio unit 12 has detected a signal for the 1xEVDO system.

  In addition, after starting the 1xEVDO control unit 20, the control unit 13 temporarily stops the 1xEVDO control unit 20 at a predetermined time interval (5 second interval in this embodiment) during packet data transmission / reception. , Cdma2000 1x control unit 19 is controlled to be switched, and after cdma2000 1x control unit 19 is started, the paging channel is monitored to detect a voice incoming call. Not performed by the incoming voice call detection unit). If no incoming voice call is detected, the cdma2000 1x control unit 19 is stopped and the 1xEVDO control unit 20 is activated to perform switching control to resume packet data transmission / reception. Further, when an incoming voice call is detected, the control unit 13 controls the cdma2000 1x control unit 19 to execute the incoming call operation process, and receives a notification from the operation unit 18 that the response button has been pressed. , Cdma2000 1x control unit 19 controls to execute the incoming call response operation process, and performs a voice call.

  The silence detection unit 22 monitors the downlink voice from the telephone network 6 (monitors whether or not the voice signal is silent) in a voice call in the cdma2000 1x system, and detects the silence state (for example, the voice level). Is detected), the fact is notified to the voice processing unit 14. When the voice processing unit 14 receives a notification that the silent detection unit 22 has detected a silent state for the downlink voice from the telephone line network 6, the voice processing unit 14 notifies the control unit 13 to that effect.

  Upon receiving a silent state detection notification from the voice processing unit 14 in a voice call in the cdma2000 1x system, the control unit 13 temporarily stops the cdma2000 1x control unit 19 and immediately starts the 1xEVDO control unit 20 In addition, the 1xEVDO control unit 20 is controlled so as to transmit packet data (minimum of 6 bytes only in the header and footer) to the 1xEVDO base station. Upon receiving a notification from the 1xEVDO control unit 20 that packet data (at least 6 bytes including only header and footer) has been transmitted, the 1xEVDO control unit 20 is temporarily stopped and the cdma2000 1x control unit 19 is activated. To resume voice call processing.

  The transmitter 15 is a speaker that outputs voice in a voice call. The receiver 16 is a microphone for inputting voice in a voice call. The display unit 17 includes a liquid crystal display and displays various information. The operation unit 18 includes dial keys, on-hook, off-hook, function keys, and the like. The timer 21 temporarily stops the 1xEVDO control unit 20 during packet data transmission / reception after the control unit 13 activates the 1xEVDO control unit 20 after performing the switching operation from the 1xEVDO system to the cdma2000 1x system. The time interval (for example, 5 second interval) for performing the switching operation for starting the cdma2000 1x control unit 19 is measured.

  Next, the voice / data switching operation of the portable terminal 1-1 will be described with reference to FIG. While the portable terminal 1-1 is performing data communication using the IP network 3 via the 1xEVDO base station 2, for example, the 1xEVDO control unit 20 is temporarily stopped at intervals of 5 seconds, and cdma2000 1x By activating the control unit 19 and monitoring the paging channel, it is detected whether there is an incoming voice call via the cdma2000 1x base station 5-1 (steps S1 to S3). If no incoming voice call is detected at this time, the cdma2000 1x control unit 19 is stopped and the 1xEVDO control unit 20 is activated to resume data communication.

  On the other hand, if a voice incoming call is detected after the 1xEVDO control unit 20 is temporarily stopped, the incoming call operation process is executed, and when a notification to the effect that the response button is pressed is received from the operation unit 18, the incoming call response operation is performed. The process is executed to perform a voice call process (steps S4 to S7). In a voice call, when silence is detected in the downlink voice from the telephone network 6 by the silence detector 22 (step S8), the cdma2000 1x controller 19 is stopped and the 1xEVDO controller 20 is immediately activated. At the same time, packet data (at least 6 bytes including only header and footer) is transmitted to the 1xEVDO base station 2 (step S9). At this time, when the packet data is received by the 1xEVDO base station 2, the dormant timer control unit A (disconnect control means) resets the dormant timer B (the dormant timer control unit A is connected to the portable terminal 1- When 1 is switched to the cdma2000 1x system, the communication line is controlled not to be disconnected for a predetermined time, and this predetermined time is measured by the dormant timer B. The resetting of the dormant timer B is performed by the predetermined time. It means not to pass). As a result, it is possible to perform a long-time voice call while avoiding disconnection of data communication.

  While the mobile terminal 1-1 is temporarily resuming data communication with the 1xEVDO base station 2, the mobile terminal 1-1 disconnects the connection between the mobile terminal 1-1 and the cdma2000 1x base station 5-1. To do. At this time, the connection between the partner mobile terminal 1-2 and the cdma2000 1x base station 5-1 remains connected. In this case, the partner mobile terminal 1-2 is in a silent state.

  In step S9, when the control unit 13 receives a notification from the 1xEVDO control unit 20 that transmission of packet data (only 6 bytes at least in the header and footer) has been completed, the 1xEVDO control unit 20 temporarily stops. (Step S10) The cdma2000 1x control unit 19 is activated, and the connection between the terminal itself and the cdma2000 1x base station 5-1 is reestablished to restart the voice call processing (Step S11).

  As described above, the interval between the detection of silence and the resumption of data communication and the resumption of voice call after packet transmission is within about 500 msec, so that seamless voice can be provided without giving a sense of discomfort to the user of the other mobile terminal. You can keep the call. Thereafter, when the voice call is over (step S12), the control unit 13 stops the cdma2000 1x control unit 19 and executes the switching operation of starting the 1xEVDO control unit 20, thereby restarting packet data transmission / reception (step S12). Step S13).

  In this way, even when a voice call continues for a long time, silence during the voice call is detected, and at that timing, the voice call in the cdma2000 1x system is temporarily switched to the data communication in the 1xEVDO system. By performing packet transmission control to the 1xEVDO base station, the dormant timer B is reset on the 1xEVDO base station side, so that disconnection of data communication is avoided and long-time voice communication is possible. Become.

  In the embodiment described above, the control unit 13 and the like may be executed in a computer system. A series of processing steps by the control unit 13 and the like described above are stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing the program. That is, each processing means and processing unit in the control unit 13 and the like is performed by a central processing unit such as a CPU reading the above program into a main storage device such as a ROM or RAM and executing information processing / calculation processing. Is realized.

  Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  In the present embodiment, when the portable terminal 1-1 is making a voice call in the cdma2000 1x system, the silence detection unit 22 detects whether or not the voice signal is in the silence state, and the silence state is detected. However, in the present invention, the communication method is not limited to the detection of the silence state by the silence detection unit 22 but also when the sound level is almost zero. May be temporarily switched to the 1xEVDO system, or the communication method may be temporarily switched to the 1xEVDO system when a voice call has passed for a predetermined time.

It is a conceptual diagram which shows the structure of the communication system using the portable terminal by embodiment of this invention. It is a block diagram which shows the structure of the portable terminal 1-1 by this embodiment. It is a sequence diagram for demonstrating the audio | voice / data switching operation | movement of the portable terminal by this embodiment. It is a sequence diagram for demonstrating the audio | voice / data switching operation | movement by a prior art.

Explanation of symbols

1-1 ... mobile terminal (wireless communication terminal), 2 ... 1xEVDO base station (base station), 3 ... IP network, 4 ... content server, 5-1, 5-2 ... cdma2000 1x base station, 6 ... telephone line network, 11 ... antenna, 12 ... radio unit, 13 ... control unit, 14 ... voice processing unit, 15 ... transmission unit, 16・ ・ ・ Receiving unit, 17 ... display unit, 18 ... operation unit, 19 ... cdma2000 1x control unit, 20 ... 1xEVDO control unit, 21 ... timer, 22 ... silence detection unit (Silence detection means)

Claims (6)

A wireless communication terminal that switches between a first communication system for performing data communication or a second communication system for performing voice communication, and a base having a dormant timer that is wirelessly connected to the wireless communication terminal using the first communication system A wireless communication method in a wireless communication system comprising a station,
When the wireless communication terminal performs voice communication using the second communication method during data communication of the first communication method, the base station switches to the first communication method during the voice communication. A wireless communication method characterized by transmitting data to the base station to reset a dormant timer set by . A wireless communication terminal that switches between a first communication system for performing data communication or a second communication system for performing voice communication, and a base having a dormant timer that is wirelessly connected to the wireless communication terminal using the first communication system A wireless communication system comprising a station,
When the wireless communication terminal performs voice communication using the second communication method during data communication of the first communication method , the wireless communication terminal performs control to switch to the first communication method during the voice communication. and control means, when you switch to the first communication system by the switch control means, and means for transmitting data to the base station in order to re-set the dormant timers to the base station is set Prepared,
The base station includes a means for resetting a set dormant timer when the data is received . A wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication, and a base station that is wirelessly connected to the wireless communication terminal using the first communication method. A wireless communication system comprising:
The base station comprises a disconnect control means for controlling the communication line not to disconnect for a predetermined time when the wireless communication terminal is switched to the second communication method,
The wireless communication terminal is configured to switch to the first communication method when performing communication by the second communication method, and to switch to the first communication method by the switching control unit. Requesting means for requesting the base station not to pass the predetermined time when switched,
The base station further comprises disconnection time control means for controlling the disconnection control means so that the predetermined time does not elapse based on the request,
The switching control means, detecting means for detecting whether a voice signal is in a silent state when the wireless communication terminal is communicating in the second communication method;
A switching means for switching the communication method to the first communication method when a silent state is detected by the detecting means;
A wireless communication system comprising: A wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication,
Switching control means for controlling to switch to the first communication method during voice communication when performing voice communication in the second communication method during data communication of the first communication method;
When you switch to the first communication method by the switching control means, means for transmitting data to the base station in order to re-set the dormant timers to the base station is set,
A wireless communication terminal comprising: A wireless communication terminal that switches between a first communication method for performing data communication or a second communication method for performing voice communication,
Switching control means for controlling to switch to the first communication method when performing communication in the second communication method;
When switching to the first communication method by the switching control means, request means for requesting a base station wirelessly connected in the first communication method not to pass a predetermined time until the communication line is disconnected; With
The switching control means, detecting means for detecting whether or not the audio signal is silent when communicating in the second communication method;
A switching means for switching the communication method to the first communication method when a silent state is detected by the detecting means;
A wireless communication terminal comprising: A base station having a radio communication terminal that switches a first communication method for performing data communication or a second communication method for performing voice communication and a dormant timer that is wirelessly connected by the first communication method,
During the data communication by the first communication system, it performs voice communication with the second communication method, during the voice communication, from the first toggle its said wireless communication terminal to the communication system, the base station is set A base station comprising means for resetting a set dormant timer upon receiving data transmitted to reset the set dormant timer .

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