JP2009290546A - Internet telephone system, management server and terminal management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to refer to characteristics of an active time and values of transmission quality in a communication line used for Internet telephone whenever the user desires to do so, and to permit the user to select a price plan on the basis of a time slot having high usage frequency and transmission quality values. <P>SOLUTION: A management server 140 accumulates and statistically processes communication information including an establishment time, a communication duration time and a transmission quality value in the communication duration time for each terminal 130 when a communication terminal 130a has established a communication link with the other communication terminal 130b, and then the server correctively stores the results of the statistical process so that they can be referenced by the communication terminal 130. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an Internet telephone system, a management server, and a terminal management method for performing voice communication between communication terminals via the Internet.

  The Internet telephone is a service that performs two-way voice communication with a partner communication terminal using the Internet protocol (IP). Such voice communication data may include not only voice data but also image data captured through a videophone. In an IP phone, an IP address is assigned to each communication terminal, and a partner communication terminal is specified by an IP phone number associated with the IP address. In Internet telephones, voice is transmitted via the Internet in compressed and encoded packets, so even long-distance and long-distance calls can be made cheaper than ordinary landline telephones. I can enjoy it.

  However, while there is an advantage that a telephone call can be made at a low cost, in the case of an Internet telephone, the sound quality may be deteriorated or the telephone call may be interrupted depending on the transmission quality. This is affected by packet loss due to traffic congestion, packet transmission delay, and arrival time interval (jitter) between packets.

  Therefore, as a technique for evaluating the transmission quality of a communication line, for example, Patent Document 1 measures delay time and sound quality from a received signal, and calculates an interaction amount between the obtained delay time and sound quality. A method for evaluating transmission quality with high accuracy is disclosed.

Also, the transmission quality value is obtained by exchanging dedicated packets for measuring the transmission quality with the other party, and the encoding method of the audio signal and the multiplicity of the audio packet are changed according to the transmission quality value. Accordingly, a technology for realizing efficient telephone calls by effectively utilizing network resources while maintaining communication quality is also disclosed (for example, Patent Document 2).
Japanese Patent No. 3809164 JP-A-2005-184201

  The time when traffic concentrates on the Internet is difficult to predict. If an Internet phone is used carelessly, the transmission quality may deteriorate immediately and the call may become impossible. However, in the technique such as Patent Document 1 described above, in order to evaluate the transmission quality, a complicated calculation process is required, so that a calculation load is applied and it takes a long time to obtain a result. Therefore, it is difficult to acquire transmission quality that changes every moment according to the usage status of the communication line of the transmission path.

  In the technique of Patent Document 2, the transmission quality value can be acquired if the communication line in the Internet telephone is continued, that is, during a call, but the transmission quality value cannot be obtained before the call. Couldn't figure out when to avoid Internet phone calls.

  Furthermore, in the conventional technology described above, there is no relationship between the server that manages the usage fee for using the communication line of the Internet telephone and the server that acquires the transmission quality value. However, it was difficult to consider the transmission quality, and the Internet telephone could not be used effectively.

  In view of such a problem, the present invention can refer to the usage time characteristic and transmission quality value of a communication line by Internet telephone when a user desires, and charges based on a frequently used time zone and transmission quality value. It is an object to provide a new and improved Internet telephone system, management server, and terminal management method capable of selecting a plan.

  In order to solve the above problems, a typical configuration of the present invention includes a call control server that is connected to a communication terminal via the Internet and controls voice communication between the communication terminal and another communication terminal, and a communication terminal. In an Internet telephone system comprising a management server for managing, a call control server, when a communication terminal establishes a communication line with another communication terminal, a quality deriving unit for deriving a transmission quality value of the communication line, and a communication A quality transmitting unit that transmits to the management server communication information including an establishment time at which the line is established, a communication duration, and a transmission quality value at the communication duration. The management server receives the communication information from the call control server. A quality receiving unit that stores the received communication information for each communication terminal and performs statistical processing on each item in the communication information, And the processing result reference storage unit for storing the visible to, characterized in that it comprises a.

  With the configuration of the present invention including the management server, the communication information including the establishment time, the communication continuation time, and the transmission quality value at the communication continuation time established by the call control server is stored for each communication terminal. Statistical processing can be performed for each item. Here, the statistical processing is a predetermined time period such as a time period with a high usage frequency for each communication terminal, an average value of transmission quality values in the time period, and a value obtained by dividing the minimum value of the transmission quality value in the time period by the maximum value. Is to calculate a transmission quality value or the like at the time of

  Therefore, the management server can collectively manage the usage time characteristic and the transmission quality value characteristic for each communication terminal, and the communication terminal can refer to the result of statistical processing. It is possible to grasp its own usage time characteristic and transmission quality value characteristic only by accessing such a management server once.

  The management server further applies a price plan holding unit that holds a plurality of price plans, and applies a plurality of price plans in a single or a combination to the results of statistical processing, calculates the difference from the current price, and is inexpensive The order extracting unit that extracts a predetermined number of rate plans and the processing result reference storage unit may be able to refer to the difference between the predetermined number of rate plans and the current rate.

  With this configuration, it is possible for the user using the communication terminal to refer to the difference (difference) between the predetermined number of charge plans and the current charge. Therefore, the user can know an inexpensive charge plan together with the transmission quality value without performing complicated calculations, and can compare the transmission quality value with the charge. As a result, the user can select a rate plan in consideration of the transmission quality value, and can effectively use the Internet telephone.

  The transmission quality value is the ITU-T recommendation G.264. An R value that is an evaluation value of the total transmission quality between communication terminals defined in 107 may be used.

  By using the R value as a transmission quality evaluation criterion, it is possible to easily grasp the transmission quality using standard numerical values without separately using a troublesome new index.

  In order to solve the above problems, another typical configuration of the present invention is a management server that manages a communication terminal that performs voice communication via the Internet, and the communication terminal establishes a communication line with another communication terminal. A quality receiving unit that receives communication information including the established time, communication duration, and transmission quality value at the communication duration, and stores the received communication information for each communication terminal and performs statistical processing on each item in the communication information A statistical processing unit, and a processing result reference storage unit that stores the result of the statistical processing so that the communication terminal can refer to the statistical processing result are provided.

  In order to solve the above-described problems, another typical configuration of the present invention includes a call control server that is connected to a communication terminal via the Internet and controls voice communication between the communication terminal and another communication terminal, and a communication. A terminal management method for managing a terminal, wherein the call control server derives a transmission quality value of the communication line when the communication terminal establishes a communication line with another communication terminal, and performs communication The communication information including the establishment time at which the line is established, the communication duration, and the transmission quality value at the communication duration is transmitted to the management server. The management server receives the communication information from the call control server, and receives the received communication information. It accumulates for each communication terminal, performs statistical processing on each item in the communication information, and stores the result of statistical processing so that it can be referred to from the communication terminal.

  The components corresponding to the technical idea in the Internet telephone system described above and the description thereof can be applied to the management server and the terminal management method.

  As described above, in the Internet telephone system of the present invention, the use time characteristic and transmission quality value of the communication line by the Internet telephone can be referred to when the user desires, and based on the frequently used time zone and the transmission quality value. You can select a price plan.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Specific numerical values and the like shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Internet telephone system)
FIG. 1 is a block diagram showing a schematic configuration of an Internet telephone (IP telephone) system according to an embodiment. The Internet telephone system 100 includes a call control server 110, a communication network 120 such as the Internet or a dedicated line, communication terminals 130 (130a and 130b), and a management server 140.

  In the Internet telephone system 100, when a user attempts to make a call to another communication terminal 130b, which is a partner, using the communication terminal 130a, the user operates his / her communication terminal 130 via the communication network 120. The IP telephone number of the other communication terminal 130b is transmitted to the call control server 110. The call control server 110 authenticates the communication terminal 130, derives an IP address associated with the IP telephone number of the other communication terminal 130b, and transmits the IP address to the communication terminal 130a.

  The communication terminal 130a directly accesses the other communication terminal 130b based on the IP address received from the call control server 110. In another communication terminal 130b, in order to start voice communication with the communication terminal 130a, authentication with the call control server 110 is performed, and when a connection permission is received, a communication line between the communication terminal 130a and the other communication terminal 130b is established. After that, voice communication is performed only between the communication terminal 130a and the other communication terminal 130b without going through the call control server 110. In the configuration based on such a hybrid network topology, since the call itself is performed independently at each communication terminal, the burden on the call control server 110 can be reduced.

  FIG. 2 is a block diagram showing another configuration of the Internet telephone system. The Internet telephone system 500 includes a call control server 110, a communication network 120 such as the Internet or a dedicated line, an access point 150, communication terminals 130 (130c and 130d), and a management server 140. .

  The access point 150 is connected to the communication terminal 130 by wireless communication, and can execute high-speed data communication with the communication terminal 130. The communication terminal 130 connected to the access point 150 includes a PHS terminal, a mobile phone, a notebook personal computer, a PDA (Personal Digital Assistant), a digital camera, a music player, a car navigation system, a portable TV, a game device, a DVD player, a remote Various electronic devices capable of wireless communication such as a controller can be used as the communication terminal 130.

  In addition, as the above-described wireless communication, various technologies are employed to improve the communication speed and communication quality between the communication terminal 130 and the access point 150. For example, Bluetooth (registered trademark), WLAN, or the like is used. Can do.

  Hereinafter, specific configurations and operations of the call control server 110, the communication terminal 130, and the management server 140 in the Internet telephone systems 100 and 500 will be described.

(Call control server 110)
FIG. 3 is a block diagram showing a schematic configuration of the call control server. A call control (SIP: Session Initiation Protocol) server 110, also called a gatekeeper, works in conjunction with a VoIP (Voice over Internet Protocol) adapter or a DNS (Domain Name System) server, depending on the IP telephone number issued by the communication terminal 130, Control connection or disconnection between communication terminals. SIP refers to an IETF (Internet Engineering Task Force) standard communication protocol for establishing a session between two or more communication terminals.

  Here, in order to facilitate understanding, the transmission quality evaluation in the present embodiment has been described, but it goes without saying that other components related to voice communication are included.

  As shown in FIG. 3, the call control server 110 constituting the Internet telephone system includes a server control unit 200, a server memory 210, and a server communication unit 220.

  The server control unit 200 manages and controls the entire call control server 110 by a semiconductor integrated circuit including a central processing unit (CPU). The server control unit 200 also executes management of personal information such as a user identifier in the Internet telephone system 100 and conversion of an IP telephone number and an IP address. The server memory 210 is composed of ROM, RAM, EEPROM, nonvolatile RAM, flash memory, HDD, and the like, and stores programs processed by the server control unit 200, time information, and the like.

  In this embodiment, the server control unit 200 also functions as a communication establishment unit 202 and a quality derivation unit 204.

  The communication establishment unit 202 establishes a communication line from the communication terminal 130a to another communication terminal 130b in response to a request from the communication terminal 130a.

  The quality deriving unit 204 derives a transmission quality value of the communication line when the communication terminal 130a establishes a communication line with the other communication terminal 130b. In this embodiment, the transmission quality value is ITU-T recommendation G.264. The R value is an evaluation value of the total transmission quality between communication terminals defined in 107. By using the R value as a transmission quality evaluation criterion, it is possible to easily grasp the transmission quality from standard numerical values without separately accepting a troublesome new index. The specific contents of the R value will be described in detail later.

  The server communication unit 220 can be connected to various other servers including the management server 140 via the communication network 120. In the present embodiment, the server communication unit 220 also functions as the quality transmission unit 222.

  The quality transmitting unit 222 stores communication information including the establishment time when the communication terminal 130a establishes a communication line with the other communication terminal 130b, the communication duration, and the R value at the communication duration derived by the quality deriving unit 204. Send to.

(Management server 140)
FIG. 4 is a block diagram showing a schematic configuration of the management server. As shown in FIG. 4, the management server 140 includes a management control unit 300, a management memory 310, and a management communication unit 320.

  The management control unit 300 manages and controls the entire management server 140 by a semiconductor integrated circuit including a central processing unit (CPU). The management memory 310 includes a ROM, a RAM, an EEPROM, a nonvolatile RAM, a flash memory, an HDD, and the like, and stores programs processed by the management control unit 300, time information, and the like. The management communication unit 320 can be connected to various other servers including the call control server 110 via the communication network 120.

  In the present embodiment, the management control unit 300 also functions as the statistical processing unit 302 and the order extraction unit 304. The management memory 310 includes a processing result reference storage unit 312 and a rate plan holding unit 314 that holds a plurality of rate plans in advance. The management communication unit 320 also functions as the quality receiving unit 322.

  The statistical processing unit 302 accumulates the communication information received by the quality receiving unit 322 for each communication terminal 130 and performs statistical processing on each item in the communication information.

  Here, the statistical processing is a predetermined time period such as a time zone with a high usage frequency for each communication terminal 130 and an average value of R values in the time zone, a value obtained by dividing the lowest value of the R value in the time zone by the highest value, or the like. R value etc. in time is calculated. For example, an average value of R values for one minute, one hour, one day, one week, and one month is calculated.

  The order extraction unit 304 applies a plurality of rate plans held by the rate plan holding unit 314 alone or in combination to the result of the statistical processing performed by the statistical processing unit 302, and the difference (difference) from the current rate plan And a predetermined number of rate plans are extracted in ascending order.

  The processing result reference storage unit 312 enables the communication terminal 130 to refer to the difference between the result of the statistical processing performed by the statistical processing unit 302 and the predetermined number of rate plans extracted by the order extraction unit 304 and the current fee. Store. Here, “to be referred to” may be referred to when the communication terminal 130 accesses the management server 140, or the communication terminal 130 includes a display unit configured by a liquid crystal display, EL (Electro Luminescence), or the like. In some cases, the management server 140 may transmit to the communication terminal 130 via the management communication unit 320 to display on the display unit. Further, it can also be transmitted via the management communication unit 320 to a device (for example, a personal computer) provided with another display unit held by a user who uses the communication terminal 130.

  The quality receiving unit 322 includes the R value at the communication continuation time derived from the establishment time, the communication continuation time, and the quality derivation unit 204 when the communication terminal 130a from the call control server 110 establishes a communication line with the other communication terminal 130b. Receive communication information.

  FIG. 5 is an explanatory diagram for explaining the result of statistical processing stored in the processing result reference storage unit, and the difference between a predetermined number of charge plans and the current charge. In particular, FIG. FIG. 5B is a diagram for explaining a difference between the statistical processing result of the arbitrary communication terminal 130a and the predetermined number of charge plans of the arbitrary communication terminal 130a and the current charge.

  As shown in FIG. 5A, in the present embodiment, the result of statistical processing is the average usage time for one month in each time zone, the average value of the R value in each time zone, and the maximum for each communication terminal 130. A list of usage time zones is stored. Therefore, when the communication terminal 130 tries to refer to it, the table shown in FIG. 5A is displayed on the display unit of the communication terminal 130.

  Accordingly, the user of the communication terminal 130 can directly check the result of the statistical processing stored in the processing result reference storage unit 312 whenever the user desires, so that self-management can be easily performed. It becomes.

  Also, if the R value is within the allowable range of the call but not so good in a certain time zone, a fixed phone is selected when calling an important party (communication quality is given priority), or a certain time zone is Since the R value is good, it is possible to select using the communication terminal 130 at low cost (prioritize low charges). Thereby, the communication terminal 130 as an Internet telephone (IP telephone) can be used effectively.

  Further, as shown in FIG. 5B, in this embodiment, the difference between the predetermined number of rate plans and the current rate is that the order of recommendation of the rate plan and the provider providing the rate plan are different for each communication terminal 130. Then, the details of the rate plan and the difference from the current rate are listed and stored. Therefore, when the communication terminal 130 tries to refer to it, the table shown in FIG. 5B is displayed on the display unit of the communication terminal 130.

  Thereby, the user using the communication terminal 130 can refer to the difference (difference) between the predetermined number of charge plans and the current charge.

  Therefore, the user of the communication terminal 130 can refer to an inexpensive charge plan together with the transmission quality value (R value), and can compare the transmission quality value with the charge. Thereby, the user of the communication terminal 130 can select a useful rate plan based on the frequently used time zone and the R value, and can effectively use the communication terminal 130 as an Internet telephone.

  As described above, according to the management server 140 according to the present embodiment, the usage time characteristic and the transmission quality value characteristic can be collectively managed for each communication terminal 130, and the communication terminal 130 can obtain the result of statistical processing. Since it can be referred to, the user of the communication terminal 130 can grasp its own usage time characteristic and transmission quality value characteristic by accessing the management server 140 only once.

  In addition, since it is possible for the user using the communication terminal 130 to refer to the difference (difference) between a predetermined number of charge plans and the current charge, an inexpensive charge plan with an R value without performing complicated calculations. And the R value and the charge can be compared.

  As a result, the user can select a price plan while referring to the R value, and can effectively utilize the communication terminal 130 as an Internet telephone.

(R value)
The R value, which is an example of the transmission quality value used in this embodiment, will be described in detail below. The R value (Rating Factor) is an index that can evaluate the transmission quality in the communication line between the communication terminals 130, and considers not only the call quality but also the propagation delay of the communication terminal 130 and the call control server between them. .

  The R value is specifically obtained from the parameters “Ro”, “Is”, “Id”, “Ie”, and “A”, and the calculation formula is R value = Ro−Is−Id−Ie + A. Here, Ro is the magnitude of the signal taking into account the influence of noise, Is is the degradation due to loudness and side sounds (sound transmitted from the mouthpiece to the earpiece through the telephone), and Id is the degradation due to delay and echo. , Ie represents deterioration in sound quality. Furthermore, a positive factor A is defined as a complementary value that takes into account convenience and the like when the communication terminal is a mobile phone.

  In derivation of the above-described elements, a total of 20 parameters such as loudness, room noise, delay, echo, and noise level affect the R value. In particular, calculation of Ro, Is, and Id has to substitute each parameter into a complicated expression. The maximum R value is 100, and the higher the R value, the better the call quality. In addition, although the R value includes many parameters, it may be difficult to measure all of them. Therefore, ITU-T Recommendation G. Reference numeral 107 defines standard values for parameters that are difficult to measure. Hereinafter, each parameter “Ro”, “Is”, “Id”, “Ie”, “A” of the R value will be described in detail.

  “Ro (Basic signa 1-to-noise ratio)” expresses subjective quality deterioration related to noise due to line noise, transmitting / receiving room noise, and subscriber line noise. Such parameters are items resulting from terminal characteristics and usage environments, and do not directly affect network quality. The range of values that Ro can take is 0-80.

  “Is (Simultaneous impairment factor)” expresses subjective quality deterioration related to volume feeling due to OLR (volume), sidetone, and quantization distortion. Such parameters are items resulting from encoding and terminal characteristics, and network quality does not directly affect the parameters. The range of values that Is can take is 0-20.

  “Id (Delay impairment factor)” expresses subjective quality deterioration related to echo / delay caused by a transmitter echo, a receiver echo, and an absolute delay. Further, an IP packet transfer delay and an IP packet loss rate are also used for deriving Id. Also, the value of Id varies depending on the codec (encoding) method in voice communication. The range of values that Id can take is 0-20.

  FIG. 6 is an explanatory diagram showing the relationship between the codec and the delay degradation (Id). As shown in FIG. 6, depending on the codec, processing for channel failure and error mitigation capability differ, so that delay degradation also differs. Referring to FIG. From 723.1 729A has less degradation of the R value, and G. It can be confirmed that 711 is less deteriorated. Even if the delay time (standard value) required for the codec is simply compared, the G.G. 729A 25.0 msec is shorter, G. 711's 1.0 msec is shorter.

  “Ie (Equipment impairment factor)” expresses subjective quality degradation related to distortion / discontinuity due to a low bit rate codec, packet loss, and the like. Further, IP packet transfer delay fluctuation is also used for deriving Ie. Further, like the above-mentioned Id, the value of Ie varies depending on the codec method in voice communication. The range of values that Ie can take is 0-40.

  FIG. 7 is an explanatory diagram showing the relationship between the codec and the packet loss (Id). Packet loss (Id) occurs due to random channel errors, bursts or IP network route changes. For example, when two or more packets are lost in succession, the voice quality is fatally deteriorated rather than the loss of one packet. Therefore, it can be understood that the degradation of the R value is different depending on the codec method with respect to the packet loss (Ie).

  “A (Advantage Factor)” interpolates the influence of convenience such as mobile communication on subjective quality (satisfaction). Such parameters are a factor of convenience and do not directly affect network quality. For example, the value of A changes even when the mobile phone is used indoors or during high-speed movement. The range of values that A can take is 0-20.

  Based on the above description, for example, when the R value is derived with Ro = 80, Is = 10, Id = 10, Ie = 10, and A = 5, the R value is 80-10-10-10 + 5 = 55.

  Among “Ro”, “Is”, “Id”, “Ie”, and “A” described above, the absolute delay and packet loss particularly in “Id” and “Ie” have a great influence on the R value. Also, as shown in FIGS. 7 and 8, the codec is also important in evaluating the transmission quality. Therefore, if it is difficult to refer to a plurality of parameters, it is possible to estimate the transmission quality of a certain communication line even if only these three items are evaluated.

(Device management method)
Next, a terminal management method for managing the communication terminal 130 using the management server 140 described above will be described. FIG. 8 is a sequence diagram showing the flow of processing of the terminal management method according to the present embodiment.

  When the user attempts to make a call to another communication terminal 130b that is the other party using the communication terminal 130a, a communication establishment request is transmitted to the call control server 110 according to the user's operation input (S400: communication establishment request). Step). In response to a communication establishment request from the communication terminal 130a, the communication establishment unit 202 of the call control server 110 establishes a communication line from the communication terminal 130a to the other communication terminal 130b (S402: communication establishment step).

  When the communication terminal 130a establishes a communication line with another communication terminal 130b, the quality deriving unit 204 of the call control server 110 derives a transmission quality value (R value) of the communication line (S404: quality deriving step).

  Thereafter, when the continuation of the communication line ends (S406: line disconnection step), the R value at the communication continuation time derived at the establishment time, communication continuation time, and quality derivation step S404 at which the communication line is established at communication establishment step S402. Is transmitted to the management server 140 by the quality transmitting unit 222 (S408: quality transmitting step).

  The management server 140 receives the communication information transmitted in the quality transmission step S408 (S410: quality reception step), accumulates the communication information received by the statistical processing unit 302 for each communication terminal 130, and for each item in the communication information. Statistical processing is performed (S412: statistical processing step).

  The result of the statistical processing processed in the statistical processing step S412 is stored in the processing result reference storage unit 312 so that the communication terminal 130 can refer to it (S414: reference storage step).

  Then, when each of the communication terminals 130a and 130b makes a reference request (S416: reference request step), the management server 140 transmits the result of the statistical processing (S418: result transmission step).

  In the result transmission step S418, the result of the statistical processing transmitted for each communication terminal 130 is received by each of the communication terminals 130a and 130b and displayed on the display unit or the like (S420: result display step). Can be referred to.

  As described above, according to the present embodiment, the management server 140 can collectively manage the usage time characteristic and the transmission quality value characteristic for each communication terminal 130, and the communication terminal 130 refers to the result of the statistical processing. Therefore, it is possible for the user of the communication terminal 130 to grasp its own usage time characteristic and transmission quality value characteristic with only one access. This makes it possible to effectively use the communication terminal 130 as an Internet telephone.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the embodiment described above, only the Internet telephone can be used as the communication terminal 130, but a communication terminal having both an Internet telephone function and a telephone function using a telephone network can also be used.

  Note that each step in the terminal management method of the present specification does not necessarily have to be processed in time series in the order described as a sequence diagram, and may include processing in parallel or by a subroutine.

  The present invention can be used for an Internet telephone system, a management server, and a terminal management method that perform voice communication between communication terminals via the Internet.

1 is a block diagram showing a schematic configuration of an Internet telephone system. It is the block diagram which showed the other structure of the internet telephone system. It is the block diagram which showed the schematic structure of the call control server. It is the block diagram which showed the schematic structure of the management server. It is explanatory drawing for demonstrating the result of the statistical process stored in a process result reference storage part, and the difference of a predetermined number of charge plans and the existing charge. It is explanatory drawing which showed the relationship between a codec and delay degradation (Id). It is explanatory drawing which showed the relationship between a codec and packet loss (Id). It is the sequence diagram which showed the flow of the process of the terminal management method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100, 500 ... Internet telephone system 110 ... Call control server 120 ... Communication network 130 ... Communication terminal 140 ... Management server 150 ... Access point 200 ... Server control part 202 ... Communication establishment part 204 ... Quality derivation part 210 ... Server memory 220 ... Server Communication unit 222 ... Quality transmission unit 300 ... Management control unit 302 ... Statistical processing unit 304 ... Order extraction unit 310 ... Management memory 312 ... Processing result reference storage unit 314 ... Rate plan holding unit 320 ... Management communication unit 322 ... Quality reception unit

Claims (5)

In an Internet telephone system comprising: a call control server that is connected to a communication terminal via the Internet and controls voice communication between the communication terminal and another communication terminal; and a management server that manages the communication terminal.
The call control server
A quality deriving unit for deriving a transmission quality value of the communication line when the communication terminal establishes a communication line with the other communication terminal;
A quality transmission unit that transmits communication information including an establishment time, a communication duration, and a transmission quality value at the communication duration for establishing the communication line to the management server;
Including
The management server
A quality receiving unit for receiving the communication information from the call control server;
A statistical processing unit that accumulates the received communication information for each communication terminal and performs statistical processing on each item in the communication information;
A processing result reference storage unit that stores the result of the statistical processing so that the communication terminal can refer to it;
Internet telephone system characterized by including. The management server further includes:
A rate plan holding unit that holds multiple rate plans;
Applying the plurality of rate plans alone or in combination to the result of the statistical processing, calculating a difference from the current rate, and extracting a predetermined number of rate plans in ascending order;
The Internet telephone system according to claim 1, wherein the processing result reference storage unit can also refer to a difference between the predetermined number of charge plans and a current charge.   The transmission quality value is ITU-T recommendation G.264. The Internet telephone system according to claim 1, wherein the Internet telephone system is an R value that is an evaluation value of total transmission quality between communication terminals defined in 107. A management server that manages a communication terminal that performs voice communication via the Internet,
A quality receiving unit that receives communication information including an establishment time at which the communication terminal establishes a communication line with another communication terminal, a communication duration, and a transmission quality value at the communication duration;
A statistical processing unit that accumulates the received communication information for each communication terminal and performs statistical processing on each item in the communication information;
A processing result reference storage unit that stores the result of the statistical processing so that the communication terminal can refer to it;
A management server comprising: A terminal management method using a call control server that is connected to a communication terminal via the Internet and controls voice communication between the communication terminal and another communication terminal, and a management server that manages the communication terminal,
The call control server
When the communication terminal establishes a communication line with the other communication terminal, a transmission quality value of the communication line is derived,
Sending communication information including the establishment time at which the communication line is established, the communication duration, and the transmission quality value at the communication duration to the management server,
The management server
Receiving the communication information from the call control server;
Accumulating the received communication information for each communication terminal and performing statistical processing on each item in the communication information,
The terminal management method, wherein the result of the statistical processing is stored so as to be referable from the communication terminal.

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