JP2008042561A - Mobile communication terminal, and terminal control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly process audio data transmitted from a mobile communication network immediately after a wireless bearer has been established. <P>SOLUTION: A mobile communication terminal 10 is equipped with a MTF 11 which establishes the wireless bearer between itself and the mobile communication network 20 and a TAF 12 which processes audio data received by the MTF 11 through the wireless bearer. The MTF 11 includes a notification unit 11a which in response to reception, done by a transmission and reception control unit, of an instruction for establishing the wireless bearer from the mobile communication network 20, transmits the response indicating the establishment of the wireless bearer to the mobile communication network while notifies the establishment of the wireless bearer to the TAF 12. The TAF 12 includes a transition unit 12a which transfers the audio data to a state where the audio data can be processed when the notification has been done by the notifying unit 11a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile communication terminal and a terminal control method in the mobile communication terminal.

In a mobile communication system employing a W-CDMA (Wideband-Code Division Multiple Access) system, a mobile communication terminal includes an MTF (Mobile Termination Function) that is a transmission / reception control unit, a TAF (Terminal Adaptation Function) that is a voice call processing unit, and (For example, refer to the following Patent Document 1). In the above mobile communication system, when voice communication is performed, first, a voice call is established as a CS (Circuit Switch) call by the MTF with a communication partner terminal via the mobile communication network. Thereafter, the voice data transmitted and received using the established voice call is processed by the TAF.
JP-A-2005-328412

  Before a voice call is established, a radio bearer, which is a voice data transmission path, is established between the mobile communication terminal and the mobile communication network. In the process of establishing a voice call, the radio bearer transmits a radio bearer establishment instruction (RADIO BEARER SETUP) from the mobile communication network to the mobile communication terminal, and the mobile communication terminal sends the mobile communication network to the mobile communication network according to the establishment instruction. Then, a radio bearer establishment response (RADIO BEARER SETUP COMPLETE) is transmitted. On the mobile communication network side, when a radio bearer establishment response is received (recognized that the radio bearer has been established), voice data can be transmitted to the mobile communication terminal using the radio bearer. . On the other hand, in the mobile communication terminal, after receiving an ACK (ACKnowledgement) for the radio bearer establishment response from the mobile communication network, the MTF sends a radio bearer establishment notification to the TAF and performs channel setting etc. Data is ready for processing.

  After receiving the ACK as described above, the subsequent processing is normally defined in the standard for the procedure of mobile communication. However, in the process at the time of establishing the radio bearer, the mobile communication terminal does not enter a state where it can process voice data unless it receives ACK. Therefore, for example, when the mobile communication terminal cannot receive ACK due to a failure on the communication path, the mobile communication terminal cannot process the voice data even though the mobile communication network is in a state where the voice data can be transmitted. Become. When voice data is transmitted from the mobile communication network to the mobile communication terminal in such a state, there arises a problem that the mobile communication terminal cannot process the voice data.

  The present invention has been made in order to solve the above problems, and a mobile communication terminal and terminal control capable of reliably processing voice data transmitted from a mobile communication network immediately after a radio bearer establishment process It aims to provide a method.

  A mobile communication terminal according to the present invention includes: a transmission / reception control unit that performs radio bearer establishment processing with a mobile communication network; and a voice call processing unit that processes voice data received by the transmission / reception control unit through the radio bearer. A transmission / reception control unit that transmits a radio bearer establishment response to the mobile communication network in response to reception of a radio bearer establishment instruction from the mobile communication network by the transmission / reception control unit; It has a notification means for notifying the voice call processing section that the radio bearer has been established, and the voice call processing section has a transition means for shifting to a state where voice data can be processed when notified by the notification means. It is characterized by.

  In the mobile communication terminal according to the present invention, the transmission / reception control unit sends a bearer establishment response to the voice call processing unit and notifies the voice call processing unit that the voice call processing unit can process voice data using the notification as a trigger. Is done. That is, in the mobile communication terminal according to the present invention, the voice data can be processed before the voice data is transmitted from the mobile communication network to the mobile communication terminal using the radio bearer. Therefore, according to the mobile communication terminal of the present invention, it is possible to reliably process the voice data transmitted from the mobile communication network immediately after the radio bearer establishment process.

  By the way, the present invention can be described as an invention of a mobile communication terminal as described above, and can also be described as an invention of a terminal control method in the mobile communication terminal as follows. This is substantially the same invention only in different categories, and has the same operations and effects.

  That is, a terminal control method according to the present invention includes a transmission / reception control unit that performs radio bearer establishment processing with a mobile communication network, and a voice call processing unit that processes voice data received by the transmission / reception control unit through the radio bearer. And a transmission / reception control unit sends a radio bearer establishment response in response to reception of the radio bearer establishment instruction from the mobile communication network by the transmission / reception control unit. A notification step of transmitting to the communication network and notifying the voice call processing unit that the radio bearer has been established, and a transition step of shifting to a state in which the voice call processing unit can process the voice data when notified by the notification means It is characterized by including these.

  According to the present invention, when performing radio bearer establishment processing, a mobile communication terminal processes voice data before the voice data is transmitted from the mobile communication network to the mobile communication terminal using the radio bearer. Since it is ready, voice data transmitted from the mobile communication network immediately after the radio bearer establishment process can be reliably processed.

  Hereinafter, preferred embodiments of a mobile communication terminal and a terminal control method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 shows a configuration of a mobile communication terminal 10 according to the present embodiment. The mobile communication terminal 10 can perform mobile communication conforming to a third generation mobile communication system such as W-CDMA (Wideband-Code Division Multiple Access). As shown in FIG. 1, the mobile communication terminal 10 can be connected to a mobile communication network 20.

  As shown in FIG. 1, the mobile communication terminal 10 includes an MTF 11 and a TAF 12. The MTF 11 controls transmission / reception of control data (C-Plane data) exchanged with the mobile communication network 20 when voice communication (circuit-switched communication) is started. Control is performed to establish a voice call (CS call) in between. The control for establishing a voice call includes a process of establishing a radio bearer (Radio Bearer) that is a transmission path for voice data (U-Plane data) with the mobile communication network 20. That is, the MTF 11 is a transmission / reception control unit that performs a process of establishing a radio bearer with the mobile communication network 20. The MTF 11 controls transmission / reception of communication data including voice data (U-Plane data).

  The TAF 12 is a voice processing unit that processes voice data received by the MTF 11 through an established radio bearer. As the processing of the audio data, for example, the audio data is converted to output audio from the speaker included in the mobile communication terminal 10 or the audio input from the microphone included in the mobile communication terminal 10 is converted into audio data. This corresponds to a process of outputting to the MTF 11 for transmission to the mobile communication network 20.

  In order for the TAF 12 to process the audio data, it is necessary to shift to a state in which the audio data can be processed. If the TAF 12 is not ready to process audio data, the audio data cannot be processed even if the MTF 11 receives the audio data.

  An object of the present invention is to reliably process voice data transmitted from the mobile communication network 20 immediately after the radio bearer establishment process. Hereinafter, among the various functions of the MTF 11 and the TAF 12, specific functions for realizing the features of the present invention will be described in detail.

  As shown in FIG. 1, the MTF 11 includes a notification unit 11a. When the notifying unit 11a establishes a radio bearer, in response to reception of the radio bearer establishment instruction (RADIO BEARER SETUP) transmitted from the mobile communication network 20 by the MTF 11, the radio bearer establishment response (RADIO BEARER SETUP COMPLETE) ) To the mobile communication network 20 and notify the TAF 12 that the radio bearer has been established. The notification (RB establishment notification) to the TAF 12 includes channel information (UserCH id) that specifies a channel through which the received voice data is to be flowed in the mobile communication terminal 10.

  The TAF 12 has a transition part 12a. The transition unit 12a is a transition unit that transitions the TAF 12 to a state in which the voice data can be processed when the notification (RB establishment notification) is made by the notification unit 11a. Specifically, the transition includes a process of setting a speaker (earphone) (not shown) of a receiver included in the mobile communication terminal 10 based on channel information included in the notification from the MTF 11.

  FIG. 2 shows a hardware configuration of the mobile communication terminal 10. As shown in FIG. 2, the mobile communication terminal 10 includes a central processing unit (CPU) 101, a random access memory (RAM) 102, a read only memory (ROM) 103, an operation unit 104, a wireless communication unit 105, a display 106, and an antenna. It is configured by hardware such as 107. When these components operate, each function of the mobile communication terminal 10 described below is exhibited.

  As shown in FIG. 1, the mobile communication network 20 includes an RNC (Radio Network Controller) 21 and a CN (Core Network) 22. The RNC 21 is a device that manages a base station (not shown) included in the mobile communication network 20 and performs processing for establishing a wireless connection between the mobile communication terminal 10 and the mobile communication network 20. The radio bearer is established by transmitting and receiving control information between the mobile communication terminal 10 and the mobile communication network 20. The CN 22 is a backbone communication line of the mobile communication network 20 configured including an exchange or the like, and mainly performs processing for establishing a voice call.

  The radio bearer (RB) described above is a voice data transmission path between the mobile communication terminal 10 and the RNC 21. The transmission path between the RNC 21 and the CN 22 (the exchange included therein) is a RAB (Radio Access Bearer).

  Subsequently, processing (terminal control method) executed by the mobile communication terminal 10 of the present embodiment will be described using the sequence diagram of FIG. This process is performed when a voice call is established via the mobile communication network 20 between the mobile communication terminal 10 and another terminal of a communication partner in order to start voice communication with a user operation or the like as a trigger. It is processing. Note that the user operation that triggers the process is performed on the TAF 12 in the mobile communication terminal 10.

  First, in the mobile communication terminal 10, the TAF 12 makes a voice call establishment request to the MTF 11 (S01). In response to this process, the MTF 11 starts a process for establishing a voice call.

  Subsequently, the MTF 11 establishes an MM (Mobility Management) connection with the mobile communication network 20 (S02). The MM connection establishment processing includes processing such as user authentication. Before establishing the MM connection, an RRC (Radio Resource Control) connection used for lower level control is established between the mobile communication terminal 10 and the mobile communication network 20.

  When the MM connection is established, a CC (Call Control) connection is established as follows. The establishment of the CC connection includes establishment of a radio bearer (RB) and establishment of a voice call. First, the MTF 11 transmits a voice call establishment request (SETUP) to the CN 22 of the mobile communication network 20 via the RNC 21 (S03). The voice call establishment request includes information necessary for establishing a voice call, such as a telephone number, which is information for specifying a terminal of a voice call partner.

  When CN 22 receives the request from mobile communication terminal 10, CN 22 starts processing for establishing a call connection based on a telephone number or the like included in the request. Also, the CN 22 transmits a RAB establishment request to the RNC 21 in order to establish a radio bearer that is a voice data transmission path (S04). When receiving the request from the CN 22, the RNC 21 transmits a radio bearer (RB) establishment instruction (RADIO BEARER SETUP) to the mobile communication terminal 10 (S05). In the mobile communication terminal 10 to which the establishment instruction is transmitted, the MTF 11 receives the establishment instruction and transmits ACK (RLC: STATUS Report) to the RNC 21 (S06).

  Subsequently, in the MTF 11, radio bearer establishment processing is performed in the mobile communication terminal 10, and the notification unit 11a transmits a radio bearer establishment response (RADIO BEARER SETUP COMPLETE) to the RNC 21 (S07). At this point, a radio bearer has been established between the mobile communication terminal 10 and the mobile communication network 20. The notification unit 11a transmits a radio bearer establishment response, and transmits a radio bearer (RB) establishment notification to the TAF 12 to notify that the radio bearer has been established (S08). In the TAF 12 to which the notification is performed, the transition unit 12a shifts the TAF 12 to a state where the voice data can be processed (S09).

  At this point, the mobile communication terminal 10 can process voice data transmitted from the mobile communication network 20. However, since a voice call has not been established at this time, the voice data transmitted from the mobile communication network 20 is not transmitted from the communication partner terminal but the mobile communication network 20 itself (that is, to the mobile communication network 20). Voice data from an exchange or the like included. As described above, the mobile communication terminal 10 shifts to a voice data processable state, triggered by transmission of a radio bearer establishment response to the RNC 21 (S07).

  When the radio bearer establishment response is transmitted to the RNC 21 (S07), in the mobile communication network 20, the RNC 21 transmits an RAB establishment response to the CN 22 (S10). The CN 22 recognizes that the radio bearer has been established by receiving this RAB establishment response. At this time, the CN 22 instructs the mobile communication terminal 10 to turn on the voice data path (U-Plane path) by the control data (C-Plane data), and then establishes the established radio bearer. It is possible to transmit audio data using the. In FIG. 3, the timing at which the CN 22 can transmit the audio data is drawn so as to be earlier than the timing at which the TAF 12 can process the audio data, but both are substantially the same timing. Further, the RNC 21 transmits an ACK (RLC: STATUS Report) to the radio bearer establishment response to the mobile communication terminal 10 (S11). In the present embodiment, it is assumed that this ACK does not reach the mobile communication terminal 10 due to a failure on the communication path.

  Subsequently, the CN 22 transmits a ringing request (ALERTING) to the mobile communication terminal 10 (S12). The ringing request is for ringing a ringing sound indicating that a call is being made to a communication partner terminal in a speaker provided in the mobile communication terminal 10. Here, the CN 22 can include an instruction to turn on the voice data path (U-Plane path) in the ringing request, and for subsequent transmission of the voice data, It is necessary to turn on the path (U-Plane path). To turn on the voice data path (U-Plane path), control data (C-Plane data) such as ringing request (ALERTING) and voice call establishment notification (CONNECT) is used for voice data as described above. Instructions to turn on the path for are included. If there is an abnormality in the communication partner terminal (no ringing is required), the ringing request is not transmitted to the mobile communication terminal 10.

  Subsequently, the CN 22 can transmit voice data (U-Plane data) to the mobile communication terminal 10 after giving an instruction to turn on a path for voice data (U-Plane path) (S13). The fact that audio data can be transmitted at this timing is defined by 3GPP (3rd Generation Partnership Project) standardization. The transmitted audio data is received by the MTF 11 and sent from the MTF 11 to the TAF 12. As described above, since the TAF 12 is in a state where it can process audio data, the audio data is appropriately processed and output to a speaker or the like (S14).

  As described above, since the mobile communication terminal 10 has not received the ACK (S11) for the radio bearer establishment response (S07), the MTF 11 retransmits the radio bearer establishment response to the RNC 21 (S15). The RNC 21 transmits an ACK to the radio bearer establishment response (S15) to the mobile communication terminal 10 (S16). The MTF 11 receives the ACK.

  Thereafter, the following processing is performed as in the prior art. In the mobile communication network 20, when the establishment of a voice call is accepted from the communication partner terminal, the CN 22 transmits a voice call establishment notification (CONNECT) to the mobile communication terminal 10 (S17). Again, if it is necessary to turn on the voice data path (start transmission of voice data), the instruction is included in the voice call establishment notification. In the mobile communication terminal 10, when the MTF 11 receives the voice call establishment notification transmitted from the CN 22, the MTF 11 sends a voice call establishment notification to the TAF 12 indicating that communication with the communication partner terminal is possible (S18). The MTF 11 also transmits a voice call establishment response (CONNECT ACKNOWLEDGE) to the CN 22 (S19). Thereafter, voice data is transmitted and received between the TAF 12 and the CN 22 (communication partner terminal) using the radio bearer (voice data transmission path) of the established voice call (S20).

  The above is the processing in this embodiment. Here, the transition to the state where the voice data of the TAF 12 can be processed (S09) is performed after the reception of the radio bearer establishment notification (S08). As described above, in the processing according to the present embodiment, the notification is performed using transmission of a radio bearer establishment response by the MTF 11 (S07) as a trigger. In the conventional mobile communication terminal, the above notification is triggered by reception of an ACK to the radio bearer establishment response by the MTF 11 (S21 in FIG. 3). Therefore, in the conventional mobile communication terminal, when the voice data is transmitted from the CN 22, the TAF is not in a state where it can process the voice data, and there arises a problem that the voice data cannot be processed.

  On the other hand, as described above, in the mobile communication terminal 10 according to the present embodiment, the voice data is transmitted before the voice data is transmitted from the CN 22 of the mobile communication network 20 to the mobile communication terminal 10 using the radio bearer. It can be processed. Therefore, according to the mobile communication terminal 10 according to the present embodiment, it is possible to reliably process voice data transmitted from the CN 22 of the mobile communication network 20 immediately after the radio bearer establishment process.

  In the present embodiment, the mobile communication terminal on the transmission side has been described as an example, but the same processing may be performed at the time of establishment of a voice call also in the mobile communication terminal at the time of reception.

It is a figure which shows the structure of the mobile communication terminal in embodiment of this invention. It is a figure which shows the hardware constitutions of the mobile communication terminal in embodiment of this invention. It is a sequence diagram which shows the process (terminal control method) performed with the mobile communication terminal in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Mobile communication terminal, 11 ... MTF, 11a ... Notification part, 12 ... TAF, 12a ... Transition part, 20 ... Mobile communication network, 21 ... RNC, 22 ... CN, 101 ... CPU, 102 ... RAM, 103 ... ROM , 104 ... operation unit, 105 ... wireless communication unit, 106 ... display, 107 ... antenna.

Claims (2)

A mobile communication terminal comprising: a transmission / reception control unit that performs a radio bearer establishment process with a mobile communication network; and a voice call processing unit that processes voice data received by the transmission / reception control unit through the radio bearer. ,
In response to reception of the radio bearer establishment instruction from the mobile communication network by the transmission / reception control unit, the transmission / reception control unit transmits a radio bearer establishment response to the mobile communication network and establishes the radio bearer. Notification means for notifying the voice call processing section that
The voice call processing unit includes a transition unit that shifts to a state in which the voice data can be processed when notified by the notification unit.
A mobile communication terminal characterized by the above. Terminal control in a mobile communication terminal comprising: a transmission / reception control unit that performs processing for establishing a radio bearer with a mobile communication network; and a voice call processing unit that processes voice data received by the transmission / reception control unit through the radio bearer A method,
In response to reception of the radio bearer establishment instruction from the mobile communication network by the transmission / reception control unit, the transmission / reception control unit transmits the radio bearer establishment response to the mobile communication network and establishes the radio bearer. A notification step of notifying the voice call processing unit of the fact that
The voice call processing unit transitions to a state in which the voice data can be processed when notified by the notification means;
The terminal control method characterized by including.

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