KR20080019349A - Mobile voip communication control - Google Patents

Abstract

A mobile VoIP communication control method is provided to monitor the amount of network traffic in real time, select a proper voice/data transceiving mode according to QOS, and switch automatically into the transceiving mode of an upper level according to a real-time monitoring result, thereby adaptively optimizing voice/data transmission in real time according to a change of a network environment. A mobile VoIP(Voice over Internet Protocol) communication control method comprises the following steps of: monitoring a network state; selecting one of voice and data transceiving modes according a network monitoring result(S120,S150,S160); and transceiving a voice and/or data on the basis of the selected transceiving mode(S110,S130,S140,S170). The monitoring of the network state is performed on the basis of set QOS(Quality Of Service).

Description

Mobile VoIP communication control method {MOBILE VoIP COMMUNICATION CONTROL}

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;

2 is a diagram illustrating a control method of a first mode in a mobile VoIP communication control method according to an embodiment of the present invention;

3 is a view showing a control method of the second mode in a mobile VoIP communication control method according to an embodiment of the present invention;

4 is a view showing a third mode control method in a mobile VoIP communication control method according to an embodiment of the present invention;

5 is a view showing a control method of the fourth mode in a mobile VoIP communication control method according to an embodiment of the present invention

6 is a flowchart of a method for controlling mobile VoIP communication according to an embodiment of the present invention.

The present invention relates to a method for optimally controlling voice and data transmission when performing voice and data communication based on VoIP in a mobile terminal.

Voice over Internet Protocol (VoIP) is a communication technology that can make calls over the Internet. VoIP uses a data packet network for internet phones, which is used in the past, converts voice data into Internet protocol data packets to enable a call in a general telephone network. VoIP is not only based on existing wired networks, but can also be implemented in mobile devices based on wireless networks. VoIP over wired did not change the data rate during the data transmission during the call, but the quality of the data rate (QoS) should be guaranteed when making VoIP calls using the wireless Internet (WiBro, WiMax). Accordingly, there is a need for a technology for controlling transmission in an optimal communication state when transmitting voice and data in mobile based VoIP.

An object of the present invention is to optimize voice and data transmission when performing VoIP-based voice and data communication in a mobile terminal.

Another object of the present invention is to provide a method for monitoring network conditions and performing optimized transmission control of voice and data when performing a VoIP-based voice and data communication in a mobile terminal.

It is still another object of the present invention to monitor network conditions when performing VoIP-based voice and data communication in a mobile terminal, and to perform optimized transmission control of voice and data according to a comparison result with a set reference transmission quality (QoS). To provide a method.

According to an aspect of the present invention, there is provided a method for controlling mobile VoIP communication, the method comprising: monitoring a network state in transmitting and receiving voice and data using VoIP based on a wireless network in a mobile terminal; Selecting one of voice and data transmission / reception modes according to the network monitoring result; Transmitting and receiving voice and / or data based on the selected transmission / reception mode; Characterized in that it comprises a.

In the mobile VoIP communication control method according to the present invention, the monitoring of the network state is characterized in that according to the set transmission quality (QoS).

In the method of controlling mobile VoIP communication according to the present invention, the monitoring of the network condition is characterized by the first transmission quality (QoS) and the second transmission quality (QoS), wherein the first transmission quality is the minimum QoS, The second transmission quality is characterized by optimal QoS.

In the method for controlling mobile VoIP communication according to the present invention, the transmission / reception mode is based on bandwidth occupancy allocated to each of the voice packet and the data packet.

In the method for controlling mobile VoIP communication according to the present invention, one of the transmission and reception modes is characterized in that it guarantees voice packet transmission and reduces data packet transmission.

In the method for controlling mobile VoIP communication according to the present invention, one of the transmission and reception modes is characterized in that the transmission of only the voice packet and the suspension of the data packet transmission.

In the method for controlling mobile VoIP communication according to the present invention, one of the transmission / reception modes is characterized in that the voice communication is switched to a messenger and retransmission of the suspended data is performed.

In the mobile VoIP communication control method according to the present invention, the transmission and reception mode is characterized in that the automatic switching between modes according to the monitoring result of the network state.

In addition, the mobile VoIP communication control method according to the present invention for achieving the above object,

Obtaining a current quality of service (QoS) by monitoring a network state in a VoIP-based communication in a mobile terminal; Comparing the current transmission quality with a set optimal QoS and a minimum QoS; Performing communication by optimizing and distributing a relative share of each of the voice packet and the data packet to the QoS according to the comparison result; Characterized in that it comprises a.

An embodiment of the mobile VoIP communication control method of the present invention made as described above will be described with reference to the accompanying drawings.

1 shows a configuration of a mobile terminal according to an embodiment of the present invention. Referring to FIG. 1, a mobile terminal according to the present invention includes a controller 10 for controlling a call and data communication, a user interface 20 for inputting a user's mobile terminal operation command to the controller 10, and the controller ( A display unit 30 for displaying information related to device operation under control of 10), a codec 40 for performing voice and data encoding / decoding under the control of the control unit 10, and the codec 40 And a transmission / reception unit (T / R) 50 for transmitting and receiving voice and data based on a network, and for monitoring and transmitting the network transmission quality through the transmission / reception unit 50 to the control unit 10. The monitoring unit 60, a microphone (MIC) 71 for inputting a voice signal, an analog-to-digital converter (ADC) 72 for converting the micro-input voice signal into a digital signal and transmitting it to the codec 40, From codec 40 A speaker (SKP) (82) for digital / analog converter (DAC) (81), the converted analog voice signal output for converting the voice data to be output to an analog signal.

The user selects a counterpart for communication through the user interface 20 to perform a VoIP-based voice call in the mobile terminal. Since the protocol, communication layer, and related modules related to VoIP-based voice calls are already known technologies, the present invention will not be described in detail. Functions or information necessary for the VoIP-based voice call are displayed on the display unit 30 under the control of the controller 10.

The control unit 10 controls the connection to the other party through the transmission and reception unit 50, the voice call is made as the communication line with the other party is established. The user voice signal input through the microphone 71 is converted into a digital signal through the analog-to-digital converter 72, and the converted digital voice signal is encoded by the codec 40 and transmitted to the other VoIP terminal through the transceiver 50. Is sent.

The voice signal received from the other party's VoIP terminal through the network is transmitted to the codec 40 through the transceiver unit 50, and the digital voice signal decoded by the codec 40 is converted into an analog signal by the digital / analog converter 81. And output through the speaker 82.

The monitoring unit 60 monitors the network status during communication in real time, and transmits the monitored result, that is, QoS information of the current network, to the controller 10. As such, when the user performs data communication (data transmission) during the VoIP-based voice call, an optimized transmission control of voice and data is performed according to the QoS detected from the monitoring unit 60. Optimal transmission control of voice and data is based on the relative occupancy rate and / or possession of the voice packet and the data packet so that QoS according to the transmission rate is guaranteed.

In the present invention, this is defined and used as a transmission / reception mode. The transmission / reception mode is based on the bandwidth occupancy allocated to each of the voice packet and the data packet. One of the transmission / reception modes optimizes the voice-data transmission by guaranteeing voice packet transmission and reducing data packet transmission. In addition, one of the transmission and reception modes optimizes voice-data transmission by transmitting only a voice packet and suspending data packet transmission. In addition, one of the transmission / reception modes achieves voice-data transmission optimization by switching voice communication to a messenger and performing retransmission of paused data. Each transmission / reception may be understood as a kind of level concept. The transmission / reception mode may be automatically switched between modes according to the real-time monitoring result of the network state, and may move to a higher mode if QoS is better in the current transmission / reception mode.

2 to 5 show some examples of the voice-data optimization control method according to the mobile VoIP communication control method of the present invention, which is illustrated here is one embodiment and is not limited thereto.

2 shows a first mode MODE 1. The first mode MODE 1 shows a normal case in which a voice call and data communication are performed together. In the normal state, the bandwidth of voice and the bandwidth of data are selected at an optimal QoS point. The optimal QoS point is a value that can be set arbitrarily. In FIG. 2, a minimum QoS point is also represented, and has a relationship of minimum QoS> optimal QoS. The minimum QoS point is also a value that can be set arbitrarily.

3 shows a second mode (MODE 2). The second mode (MODE 2) is a case where the voice call and the data transmission is performed together, where the network state has a low transmission rate (Low Efficiency Network Status (1)). In this case, the QoS currently monitored from the network is maintained above the optimum QoS. In this case, the voice and data transmission are optimized by reducing the data transmission while guaranteeing the voice packet transmission. That is, it guarantees voice and reduces data transmission for the allocated bandwidth.

4 shows a third mode (MODE 3). The third mode (MODE 3) is a case where the voice call and the data transmission are performed together, where the network state has a lower transmission rate (Low Efficiency Network Status (2)). In this case, the QoS currently monitored from the network is above the minimum QoS but maintained below the optimum QoS. In this case, only the voice packet is guaranteed and the data is suspended. The transmission is optimized. That is, voice is guaranteed for the allocated bandwidth and data transmission is suspended until the QoS is better.

5 shows a fourth mode (MODE 4). The fourth mode (MODE 4) is a case where the voice call and data transmission are performed together, where the network state has a lower transmission rate (Low Efficiency Network Status (3)). In this case, the QoS currently monitored from the network is less than the minimum QoS. In this case, the voice and data transmission is optimized by switching the voice communication to a messenger and resuming the suspended data transmission. Achieve.

Each of the modes illustrated in FIGS. 2 to 5 may be switched to another mode if the optimum QoS is guaranteed according to the result of monitoring the amount of traffic in the network at all times.

Each of the modes can be understood in terms of levels. Mode 1 corresponds to the highest level, mode 2 is next, and mode 3 or mode 4 is ranked at a similar level. Therefore, it is possible to optimize the voice-data transmission optimization according to the network conditions by monitoring the traffic volume as a whole and moving to the higher mode whenever the optimal QoS is guaranteed.

Figure 6 shows an embodiment of a mobile VoIP communication control method of the present invention.

The first step S110 is a step of performing data transmission during VoIP communication (voice call), in which the voice and data optimized transmission are first performed in the first mode (MODE 1) as shown in FIG. That is, the optimized transmission of the voice-data is performed by utilizing the bandwidth allocated to each of the voice and the data. Subsequently, when entering a network traffic point or a weak field point during the movement of the mobile terminal, the monitored QoS will deteriorate.

The second step S120 is a step of determining in which mode voice-data transmission optimization is to be performed according to the currently monitored QoS. In this step, it is determined whether network traffic guarantees QoS, and it is possible to determine which mode to transition to by comparing the current state (current QoS) with optimal QoS and minimum QoS. If the current QoS satisfies the optimal QoS or more, the process proceeds to the third step S130. If the current QoS satisfies the optimal QoS but the minimum QoS or more, the process proceeds to the fourth step S140. If not, that is, if the current QoS does not satisfy the minimum QoS, the process proceeds to the fifth step S150.

The third step S130 is a step of switching to the second mode MODE 2. As described above with reference to FIG. 3, the second mode MODE2 is to optimize voice-data transmission by reducing data transmission while ensuring voice packet transmission. Switching to the second mode (MODE2) to achieve voice-data transmission optimization, and monitoring the current network conditions to switch to the first mode (MODE 1) when the QoS is better. If the QoS worsens, it may switch to the third mode (MODE 3) or the fourth mode (MODE 4).

The fourth step S140 is a step of switching to the third mode MODE3. In the third mode MODE 3, the voice-data transmission optimization is performed by performing only voice communication and suspending data transmission as described above with reference to FIG. 4. By switching to the third mode (MODE 3) to achieve voice-data transmission optimization, and monitoring the current network conditions, if the QoS is better, then switch to the second mode (MODE 2) or the first mode (MODE 1). If the QoS becomes worse, it may switch to the fourth mode (MODE 4).

The fifth step (S150) is a step of checking whether the QoS is guaranteed by checking the traffic and the transmission rate for a predetermined time when the current QoS does not reach the minimum QoS. This is described on the premise that data transmission is suspended based on the execution of the third mode (MODE 3). If the QoS is guaranteed when the traffic and the transmission rate are checked for a certain time, a switch to a higher mode may be performed. If QoS is not guaranteed even after checking the traffic and transmission rate for a certain time, the process proceeds to the sixth step S160 to switch to the fourth mode MODE4.

The sixth step S160 is a step of switching to the fourth mode MODE 4. The fourth mode MODE 4 is a step of switching voice communication to a messenger as described above with reference to FIG. 5 and starting retransmission of the suspended data. Therefore, in the sixth step S160, the process changes to the fourth mode MODE 4, and it is determined whether it is a messenger mode or when data retransmission is required.

If it is the messenger mode / data retransmission mode, the flow advances to the seventh step S170 to switch the voice communication to the messenger, and to perform the suspended data retransmission. If not in messenger mode / data retransmission mode, switch to higher mode according to QoS monitoring result.

As described with reference to FIG. 6, in the mobile VoIP communication control method of the present invention, the voice-data transmission / reception mode is appropriately selected according to QoS while monitoring the traffic volume of the network in real time. Accordingly, the automatic transition to the higher level transmission and reception mode is achieved.

Thus, it is possible to optimize the voice-data transmission in real time adaptive to changes in the network environment. Also, when performing voice and data communication using a limited bandwidth network, it guarantees voice transmission and reduces data transmission according to QoS, suspends data transmission and guarantees only voice communication, or converts voice communication to messenger, Voice and data transfer optimization can be achieved in a variety of ways, including resuming a suspended data transfer.

According to the method for controlling mobile VoIP communication of the present invention, when performing data transmission during a VoIP-based call to a mobile terminal, it is possible to optimize voice-data transmission according to network conditions.

Claims (12)

In the mobile terminal for transmitting and receiving voice and data using VoIP based on the wireless network, Monitoring network status; Selecting one of voice and data transmission / reception modes according to the network monitoring result; Transmitting and receiving voice and / or data based on the selected transmission / reception mode; Mobile VoIP communication control method comprising a. The method of claim 1, wherein the monitoring of the network state is based on a set quality of service (QoS). 2. The method of claim 1, wherein the monitoring of the network condition is in accordance with a set first quality of service (QoS) and a second quality of service (QoS), wherein the first quality of transmission is the minimum QoS and the second quality of quality is the optimal QoS Minimum QoS < Optimum QoS). The method of claim 1, wherein the transmission / reception mode is based on bandwidth occupancy allocated to each of a voice packet and a data packet. 2. The method of claim 1, wherein one of the transmission and reception modes is to guarantee voice packet transmission and to reduce data packet transmission. The method of claim 1, wherein one of the transmission / reception modes is to transmit only a voice packet and pause data packet transmission. The method of claim 1, wherein one of the transmission and reception modes is to switch the voice communication to a messenger and perform retransmission of the suspended data. The method of claim 1, wherein the transmission / reception mode is automatically switched between modes according to a monitoring result of a network state. Obtaining a current quality of service (QoS) by monitoring a network state in a VoIP-based communication in a mobile terminal; Comparing the current transmission quality with a set optimal QoS and a minimum QoS (where minimum QoS < optimal QoS); Performing communication by optimizing and distributing a relative share of each of the voice packet and the data packet to the QoS according to the comparison result; Mobile VoIP communication control method comprising a. 10. The method of claim 9, wherein the data packet transmission is reduced compared to a voice packet when the current transmission quality is equal to or higher than the optimum QoS. 10. The method of claim 9, wherein if the current transmission quality is equal to or greater than the minimum QoS and less than the optimal QoS, data transmission is paused and only voice communication is performed. 10. The method of claim 9, wherein when the current transmission quality is equal to or lower than the minimum QoS, the voice communication is switched to a messenger and data retransmission is suspended.

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