WO2006106921A1

WO2006106921A1 - Service level management system for mobile communication

Info

Publication number: WO2006106921A1
Application number: PCT/JP2006/306839
Authority: WO
Inventors: Yasuhiko Matsunaga
Original assignee: Nec Corporation
Priority date: 2005-03-31
Filing date: 2006-03-31
Publication date: 2006-10-12
Also published as: JP4941296B2; JPWO2006106921A1

Abstract

A service level management system in which the availability of a communication service and the service quality are measured for each subscriber even if there is a blind zone in a service area and control for comparing them with the guaranteed service level and maintaining them is made. A mobile terminal (10) has means for measuring the availability, failure history, and service quality of a communication service according to, e.g., the pilot signal quality of the nearest radio base station and transmitting the measurement results to a management server (100) over a mobile communication network. If the guarantee area is limited, the mobile terminal measures its position and measures the availability and communication service quality only when the mobile station is present in the guarantee area.

Description

Specification

Service level management system for mobile communications

Technical field

TECHNICAL FIELD [0001] The present invention relates to service level management of communication services in a mobile communication system, and more particularly to a method of analysis in which a mobile terminal measures the availability and quality of communication services and reports them to a management server.

Background art

Conventionally, in mobile communication systems, areas that provide communication services are generally designed by collecting and analyzing radio wave propagation information offline. This collection of radio wave propagation information is performed by specialized personnel traveling in the area using a vehicle equipped with a radio wave condition analysis device and positioning means such as GPS (Global Positioning System). Since the number of observation points during travel is limited, the communication service quality of the entire service area is estimated separately using a radio wave propagation simulator, and the operation parameters of the network equipment are changed according to the result.

[0003] For example, offline radio wave propagation information collection 'analysis method described in “Patent Document 1”, and communication service quality estimation using the radio wave propagation simulator described in Section 3.3 of “Non-Patent Document 1”. There are methods.

[0004] In addition, regarding the quality of services actually provided to mobile terminals by mobile communication carriers, quality information in units of radio cells is transmitted to network servers such as radio base station control devices and switching stations from the management server. Monitoring by periodically transmitting. For example, in a mobile communication system based on the specifications of 3GPP (3rd Generation Partnership Project), statistical information to be acquired by a radio base station control device or an exchange is defined! (See Non-Patent Document 2).

[0005] Further, apart from the collection of quality information by the devices in the general mobile communication network described above, there is also known a method of collecting communication service quality complementarily using a general mobile terminal (for example, Patent Document 2, Patent Document 3 and Patent Document 4).

[0006] In “Patent Document 2”, a plurality of observation points in a service area of a mobile communication system are generally used. A method of transmitting signal strength measurement results via a mobile communication network is shown. In Patent Document 3, when the radio wave measurement system determines that measurement of radio wave conditions is necessary, it designates the measurement time and measurement area and instructs the mobile communication network to perform measurement. A method of obtaining the situation measurement results is shown. In addition, “Patent Document 4” discloses a method of transmitting a radio wave condition measured at a general mobile terminal to a management server together with position information measured using a positioning device such as GPS.

[0007] Thus, in mobile communication systems, techniques for measuring radio wave propagation status and communication service quality of mobile terminals in the service area within the service area are established offline or online.

Patent Document 1: Japanese Patent Laid-Open No. 08-172403

Patent Document 2: JP 2001-298398 A

Patent Document 3: Japanese Patent Laid-Open No. 2004-214875

Patent Document 4: Japanese Patent Laid-Open No. 2003-204296

Non-patent literature 1: Jaana Laiho, Achim Wacker, Tomas Novosad, Radio Network Planning and Optimization for UMTS ", John Wiley & Sons, 2002.

Non-Patent Document 2: 3GPP TS 32.403, "Telecommunication management; Performance Management (PM); Performance measurements-UMTS and combined UMTS / GSM (Re lease 5)", 2004.

Non-Patent Document 3: 3GPP TS 25.413 V 4.0.0, "UTRAN Iu interface RANAP signaling (Rel ease 4)", 2001.

Disclosure of the invention

Problems to be solved by the invention

[0008] However, in the conventional service level management system, if the communication service cannot be used within the service area! /, And there is a dead zone, the mobile terminal moves to the dead zone and the communication service cannot be used. There was a problem that it was impossible to know the frequency and duration.

[0009] When a failure occurs in a radio base station, a communication service can be provided to a mobile terminal by another adjacent radio base station or the communication service cannot be used continuously. There was a problem that it was not possible to know if a long time had occurred. For this reason, even if, for example, a mobile carrier has concluded a service level agreement (SLA) for the coverage and availability of communication services provided to subscribers, the SLA is actually protected. There was no means of verifying whether or not the subscribers are being used.

[0010] In addition, a mobile communication carrier communicates only in a part of its service area, for example, in a limited area such as the inside of a building owned by a corporation or a range that can be covered by a specific radio base station. When guaranteeing service quality, even if the mobile terminal detects the deterioration of communication service quality and notifies the management server, there is a means for determining whether or not the power is the quality deterioration in the area where the service level is guaranteed. I helped. Therefore, the management server was unable to detect SLA violation events with limited areas or to detect a decrease in quality margin.

[0011] Furthermore, if the management capability of the communication service in the conventional mobile communication system is only uniform quality control for each radio cell (see Non-Patent Document 2), service level monitoring according to the SLA contract of the subscriber is performed. In order to do so, it was necessary to reconfigure the database so that the quality of communication services could be recorded on a per-subscriber basis even if the percentage of subscribers requiring an SLA contract was limited.

[0012] Therefore, the present invention provides a method for measuring the availability of a communication service on the mobile terminal side and automatically managing the management server even when there is a dead zone within the service area or when a failure occurs in the radio base station. The purpose is to provide a service level management system that checks compliance with the SLA by reporting.

[0013] In addition, another object of the present invention is to detect an SLA violation event or a decrease in quality margin when a limited area for guaranteeing communication services is provided, and presents a measure for improvement. Is to provide functionality.

[0014] Still another object of the present invention is to provide a function for performing service level monitoring according to a subscriber's SLA contract without changing the database of an existing network management device.

Means for solving the problem

[0015] In order to solve the above-described problem, the present invention provides a mobile terminal of a service level management system. If the communication service becomes unavailable, the means for measuring the availability of communication services based on the reception quality of the pilot channel of the nearest radio base station, the means for measuring self-location, and the communication service become unavailable. It has means for recording communication failure information, which is the time, self-location, and immediately preceding radio wave status, and means for transmitting the measured availability and recorded communication failure information to the management server via the mobile communication network. And

[0016] Further, in the mobile terminal, the availability of the communication service is measured and the communication failure information is recorded only when the self-position of the mobile terminal is within a predetermined area.

[0017] Further, only when the mobile terminal of the service level management system is within a predetermined area, the communication service used by the mobile terminal during the predetermined measurement period Call connection request count, call connection success count, average call setup time, communication normal completion count, communication abnormal completion count, average transfer rate, average transfer delay amount, or average transfer delay Means for measuring communication service quality including one or more of jitter or average frame loss rate.

[0018] Further, in the management server of the service level management system, the means for receiving the measurement result of the communication service availability from the mobile terminal is compared with each received measurement result and the guaranteed availability. Means, a means for detecting and displaying a service level violation warning for the mobile terminal when the measurement result falls below the availability to be guaranteed or the margin of the availability is reduced, and radio resource allocation for the mobile terminal Means for notifying the mobile communication network so as to increase the priority.

[0019] Further, in the management server of the service level management system, means for receiving the measurement result of the quality of communication service from the mobile terminal, and means for comparing each received measurement result with the communication service quality to be guaranteed And means for detecting and displaying a service level violation warning for the mobile terminal when the measurement result is lower than the communication service quality to be guaranteed or when the quality margin is lowered, and radio resource allocation for the mobile terminal Means for notifying the mobile communication network so as to increase the priority. The invention's effect

[0020] According to the present invention, even when there is a dead zone within the service area or when a failure occurs in the radio base station, the mobile terminal side measures the availability of communication service and the service quality. And automatic reporting to the management server enables efficient understanding and maintenance of service levels.

[0021] Further, by using the positioning means in the mobile terminal, it is possible to operate effectively even when the area for guaranteeing the availability and quality of the communication service is limited.

Brief Description of Drawings

FIG. 1 is a configuration diagram of a mobile communication system in a first embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of a mobile terminal 10 in the first embodiment.

FIG. 3 is a diagram showing the contents of service availability record information 400 of the mobile terminal 10 in the first embodiment.

FIG. 4 is a diagram showing an internal configuration of a service level management server 100 in the first embodiment.

FIG. 5 is a diagram showing the contents of availability statistics information 500 of the service level management server 100 in the first embodiment.

FIG. 6 is a diagram showing the contents of availability guarantee level information 540 of the service level management server 100 in the first embodiment.

FIG. 7 is a state transition diagram relating to availability measurement of the mobile terminal 10 in the first embodiment.

FIG. 8 is a diagram showing an operational flow of availability rate statistical information update processing of the service level management server 100 in the first embodiment.

FIG. 9 is a diagram showing an operational flow of availability ratio comparison processing of the service level management server 100 in the first embodiment.

FIG. 10 is a diagram showing an internal configuration of a mobile terminal 10 in a second embodiment.

FIG. 11 is a diagram showing the contents of service guarantee area record information 450 of the mobile terminal 10 in the second embodiment.

FIG. 12 is a state transition diagram relating to availability measurement of the mobile terminal 10 in the second embodiment.

FIG. 13 is a diagram showing the contents of availability record information 420 of the mobile terminal 10 in the third embodiment.

FIG. 14 is a diagram showing an internal configuration of a mobile terminal 10 in a fourth embodiment. FIG. 15 is a diagram showing the contents of service quality record information 470 of the mobile terminal 10 in the fourth embodiment.

FIG. 16 is a diagram showing an internal configuration of a service level management server 100 in the fourth embodiment.

FIG. 17 is a diagram showing the contents of communication service quality statistics information 600 of the service level management server 100 in the fourth embodiment.

FIG. 18 is a diagram showing the contents of communication service quality assurance level information 700 of the service level management server 100 in the fourth embodiment.

FIG. 19 is a state transition diagram related to communication service quality measurement of the mobile terminal 10 in the fourth embodiment.

FIG. 20 is a diagram showing an operation flow of communication service quality statistics information update processing of the service level management server 100 in the fourth embodiment.

FIG. 21 is a diagram showing an operation flow of communication service quality comparison processing of the service level management server 100 in the fourth embodiment.

Explanation of symbols

1 Trajectory of movement

10-14 mobile terminals

20-24 wireless link

30, 31, 32 Radio base stations

40-47 wired link

50 Radio base station controller

60 Mobile communication core network

70 External network

80 Wireless base station 30 service area

81 Service area of radio base station 31

82 Service area of radio base station 32

83-86 service dead zone

90 Network management device 100 Service level management server

200, 300 transceiver

201 Pilot signal quality measurement means

202 Service availability measurement means

203 Measurement record information transmission means

204 Clock means

205 Service availability recording means

206 Error control measures

207 Communication control means

208 Application execution means

209 Service assurance area recording means

210 Positioning means

211 Service quality measurement means

212 Service quality record means

301 Data transfer means

302 Means to input availability measurement result

303 Means for updating availability statistics

304 Means for storing availability statistics

305 Availability comparison means

306 Usability guarantee level storage means

307 Service level violation warning display means

308 Communication service quality measurement result input means

309 Communication service quality statistical information update means

310 Communication service quality statistical information holding means

311 Communication service quality comparison method

312 Communication service quality assurance level storage means

313 Network management device notification means BEST MODE FOR CARRYING OUT THE INVENTION Next, the best mode of the present invention will be described with reference to the drawings.

Example 1

FIG. 1 shows a configuration of a mobile communication system as a first embodiment of the present invention. Subscriber terminals 10 and 11 are connected to radio base station 30 via radio links 20 and 21, and subscriber terminal 12 is connected to radio base station 31 via radio link 22 and subscriber terminals 13 and 14 are connected. Is connected to the radio base station 32 via radio links 23 and 24.

[0026] The measurement of the availability rate of the communication service is performed at the mobile terminal when passing through the service insensitive zone 84 when the mobile terminal 10 moves inside the service area 80 of the radio base station 30 along the trajectory 1, for example. It is. The availability rate is also updated when communication is not possible due to a failure of the radio base station.

[0027] The radio base station controller 50 is connected to the mobile communication core network 60 via a wired link 43, and from the subordinate radio base stations 30, 31, 32 to the communication traffic and control traffic via the wired links 40, 41, 42. Send and receive.

[0028] The network management device 90 is connected to the radio base station control device 50 and the mobile communication core network 60 internal switching stations and server devices via wired links 44 and 45, and if network failure monitoring is performed at the cell level, Monitor communication service quality. Furthermore, a service level management server 100 is connected to the external network 70 via a wired link 47, and monitors the availability of communication services and the quality of communication services at the mobile terminal.

The service level management server 100 may be in an external network as shown in FIG. 1, or may be in a mobile communication network owned by a mobile communication carrier. In addition, the service level management server in the present invention mainly manages whether the service level complies with the contract value. However, if the service level management server can be linked with the network management device 90, the service level management server Various feedback controls can be performed at the time of contract violation. Such cooperation with the network management device 90 is further facilitated when the service level management server 100 is inside the mobile communication network owned by the mobile communication carrier.

FIG. 2 shows the internal configuration of the mobile terminal 10 in the first embodiment of the present invention. The mobile terminal 10 is a mobile terminal of the digital mobile communication system, and functions as the following execution means by a control program stored in the memory. [0031] When the mobile terminal 10 executes an application such as a voice call, a videophone, or data transfer, the application execution unit 208 instructs the communication control unit 207 to set up a communication channel, and uses the transceiver 200. Send and receive communication traffic.

[0032] Correction and retransmission control of errors occurring in the radio link are performed by error control means 206. The transceiver 200 outputs to the pilot signal quality measuring means 201 the pilot channel signal that also received the nearest radio base station (group) power. The signal quality of this pilot signal is used for connection / disconnection to / from the radio base station and for selection control of the radio base station during movement.

[0033] Based on the quality information of the pilot signal and the state of synchronization establishment with respect to the radio base station, the service availability measurement unit 202 determines whether or not the communication service is available at the mobile terminal. It records in the availability rate recording means 205.

[0034] The measurement record information transmitting unit 203 obtains a predetermined transmission cycle timing from the clock unit 204, and sends the availability measurement result stored in the service availability recording unit 205 to the service level management server 100. Send to.

FIG. 3 shows the contents of the service availability record information 400 of the mobile terminal 10 in the first embodiment of the present invention. Measurement start date and time (Ts) 401 and measurement end date and time (Te) 402 indicate the date and time when the measurement of the communication service availability was started and ended. The normal communication period (Tn) 403 represents the time during which the communication service was available during the time the mobile terminal was powered on during the measurement period. Also, the communication abnormal period (Ta) 404 represents the time during which the communication service is unavailable during the measurement period during which the mobile terminal is powered on.

FIG. 4 shows the internal configuration of the service level management server 100 in the first embodiment of the present invention. The service level management server 100 is a management server for the digital mobile communication system, and functions as the following execution means by a control program stored in a memory.

When the service level management server 100 receives the availability measurement result from the mobile terminal via the transceiver 300, the data transfer means 301 and the availability measurement result input means 302, the availability statistics information update means 303 makes the availability for the subscriber concerned. Update rate statistics It is stored in availability rate statistical information holding means 304.

[0037] Further, the availability comparison means 305 compares the availability guarantee level for each service class, which is stored in advance in the availability guarantee level storage means, with the availability statistics measured for each subscriber, and compares them. As a result, if the availability rate to be guaranteed is not met or the margin of availability rate is reduced, the service level violation warning display means is instructed to display the service level violation warning.

[0038] Further, when the availability ratio comparison means 305 detects a mobile terminal that does not satisfy the availability ratio or whose margin has decreased, the network management device notification means 313 provides radio resources for the mobile terminal in order to improve the availability ratio. Notify the network management device 90 to increase the priority of allocation. For example, in the case of a mobile communication system based on the specifications of 3GPP (Third Generation Partnership Project), the priority of radio resource allocation is input from the mobile communication core network to the radio base station controller when a mobile terminal makes an incoming / outgoing call Allocation / Retention Priority information included in the RAB Parameters information element of the RAB Assignment Request message. Details of the Allocation / Retention Priority parameter are detailed in Section 9.2.1.

FIG. 5 shows the contents of the availability rate statistics information 500 of the service level management server 100 in the first embodiment of the present invention. For each subscriber ID that identifies a subscriber, service class 510, availability measurement information 511, and availability history information 512 that the subscriber has contracted are stored. The availability history information 512 holds the content every time the availability measurement result is received from the mobile terminal, and the content is a summary of the service availability record information 400 received by multiple mobile terminals. is there. Based on the availability measurement information, the availability measurement value 511 is calculated.

FIG. 6 shows the contents of the availability guarantee level information 540 of the service level management server 100 in the first embodiment of the present invention. The availability of communication services is defined for each service class. Here, the value of guaranteed availability 560 corresponding to three types of service classes A, B, and C is shown. For example, service class A is a premium service with the highest guaranteed availability rate, service class B is a basic service for corporations with limited guarantee items than service class A, and service class C is a general service that does not guarantee the availability rate. Corresponding to A relationship is set.

[0041] The configuration of the first exemplary embodiment of the present invention has been described in detail above, but the radio base stations 30 to 32 in FIG.

Since the network management server 90 is well known to those skilled in the art and is not directly related to the present invention, its detailed configuration is omitted.

Next, details of the mobile terminal availability measurement processing in the first exemplary embodiment of the present invention will be described with reference to the state transition diagram of FIG. When the mobile terminal is turned on, the initial state is the power-off state 800.

When the mobile terminal is powered on, the measurement start time Ts is recorded, and a transition to the measurement start state 801 is made. The measurement start state 801 is an intermediate state that passes temporarily, and transitions to a communication normal state 802 when the radio wave condition is good and to a communication abnormal state 803 when the radio wave condition is bad.

When transitioning to the communication normal state 802, the timer T1 is started, and when transitioning to the communication abnormal state 803, the timer T2 is started. Timers T1 and T2 are timers for counting the normal communication period and abnormal communication period, respectively.

[0045] When the mobile terminal moves to the dead zone in the normal communication state 802 and the reception quality of the pilot signal falls below the threshold or the synchronization with the radio base station is lost, the timer T1 is stopped and the timer is stopped. Start T2, add the value of T1 to the normal communication period Tn, and transition to the abnormal communication state 803.

[0046] On the other hand, when the mobile terminal moves into the service area in the communication abnormal state 803 and the reception quality of the pilot signal exceeds the threshold, the timer Τ2 is stopped and the timer T1 is started, and the communication abnormality period Ta is reached. Add the value of Τ2 and transition to the normal communication state 802.

[0047] When the measurement result transmission timing arrives in the communication normal state 802, the measurement end time Te is recorded, T1 is added to the communication normal period Tn, and the timer T1 is set after transmitting the availability measurement result. Resume and record the measurement start time Ts at the end.

[0048] When the measurement result transmission timing comes in the communication abnormal state 803, the transmission timing is rescheduled to wait until the next transmission timing. When the mobile terminal detects a power-off event in the communication normal state 802 and the communication abnormal state 803, it transits to the power-off state 800. When transition from normal communication status 802 stops timer T1 Then, add the value of Tl to the normal communication period Tn, stop the timer T2 when transitioning from the abnormal communication state 803, and add the value of the timer T2 to the abnormal communication period Ta.

FIG. 8 shows an operational flow of availability rate statistics information update processing of the service level management server 100 in the first exemplary embodiment of the present invention. When the service level management server 100 receives the availability measurement result from the mobile terminal (step 901), the service level management server 100 acquires the subscriber ID of the subscriber who uses the mobile terminal (step 902) and measures it from the availability statistical information holding means. Acquired utilization rate history information is acquired (step 903). Next, the availability measurement

Available rate measurement = (sum of normal communication periods) / [(sum of normal communication periods) + (sum of abnormal communication periods)]

(Step 904), the updated availability measurement value and the measured availability history information are output to the availability statistics information holding means (Step 905), and the process is terminated (Step 906). .

FIG. 9 shows an operation flow of the availability ratio comparison process of the service level management server 100 in the first example of the present invention. First, subscriber information is sequentially selected from the top row of the availability rate statistical information holding means (step 921), and the service class to which the subscriber belongs is obtained (step 922). Assuming that the service class obtained here is the service class j's guaranteed availability rate from the availability guarantee level storage means (step 923), the communication service availability rate during the subscriber's monitoring period is the service class. Compare with the guaranteed availability of j (step 924).

[0051] If the available rate to be guaranteed is satisfied with a margin (step 925), the process returns to step 921 to process the next subscriber. On the other hand, if the guaranteed availability is not met or the margin of availability is reduced (step 925), the service level violation warning of the subscriber is output to the service level violation warning display means (step 926), and further Output to the network management device notification means so as to increase the subscriber's radio resource allocation priority (step 927).

When the comparison processing for all the subscribers is completed, the processing is terminated (step 928). As described above, by using the service level management system based on the present invention, even if there is a dead zone in the service area or when a failure occurs in the radio base station, the mobile terminal side can perform communication service. Measure availability and automatically report to management server By doing so, it becomes possible to efficiently check the availability rate of communication services on a subscriber basis and perform an avoidance operation.

Example 2

Next, as a second embodiment of the present invention, the basic configuration is as described above, but a measurement method when the availability rate is guaranteed only in a certain limited area will be described.

FIG. 10 shows the internal configuration of the mobile terminal 10 in the second embodiment of the present invention. The difference from the first embodiment is that the mobile terminal 10 includes service guarantee area recording means 209 and positioning means 210. The mobile terminal 10 stores area information for which the availability rate is guaranteed in advance in the guaranteed area recording means 209.

[0055] When the mobile terminal 10 detects that the communication service has become unavailable due to movement to a service-insensitive zone, a failure of the radio base station, or the like, the self-position is detected using the positioning means 210. If the self-position cannot be measured, the self-position obtained last when the communication service was available is used instead. Here, the service availability rate is recorded only when the self-location is within the guaranteed area stored in the guaranteed area recording means 209.

FIG. 11 shows the contents of the service guarantee area record information 450 of the mobile terminal 10 in the second embodiment of the present invention. In this example, when the range for guaranteeing the availability of communication service is limited by the mobile communication carrier, the guarantee area is defined by the combination of the latitude range 460 and the longitude range 461. A mobile terminal can only be guaranteed availability if it is within area definition 1, 2, or 3.

Such area definition based on latitude and longitude is suitable when the positioning means 210 provided in the mobile terminal is based on GPS (Global Positioning System). The definition of the area may not be a method based on latitude and longitude, and may be a method using a cell identifier of a radio base station or an identifier of a radio base station control device that guarantees availability.

FIG. 12 shows a state transition diagram related to the availability measurement of the mobile terminal 10 in the second embodiment of the present invention. The difference from the state transition diagram in the first embodiment is that a new state called the out-of-area state 824 has been created. The difference from the state transition diagram of the other first embodiment is that both the normal communication state and abnormal communication state are in the availability guarantee area. Only the normal communication within the area 822 and the abnormal communication within the area 823 are changed. When the mobile terminal moves outside the availability guarantee area, the mobile terminal transits to the out-of-area state 824, and stops measuring the normal communication period and the abnormal communication engine. Other operations are the same as those in the state transition related to the availability measurement of the mobile terminal 10 in the first embodiment shown in FIG.

[0059] Thus, in the second embodiment of the present invention, by measuring the availability rate in the mobile terminal only when the mobile terminal is located in a certain limited area, the mobile communication carrier Even when availability is guaranteed only in a limited area, measurement and inspection of availability is possible.

Example 3

Next, FIG. 13 shows the contents of the availability record information 420 of the mobile terminal 10 in the third embodiment of the present invention. In the third embodiment, as in the second embodiment, it is assumed that the mobile terminal has a function of measuring its own position.

Referring to FIG. 13, in the third embodiment, in addition to the contents of the availability record information 400 in the first embodiment shown in FIG. 3, a history of communication failures is also reported. Husband. When a communication failure occurs, the mobile terminal records the occurrence date and time 430, the occurrence position 431, and the radio wave condition immediately before the failure occurs as communication failure histories 421 to 423, and transmits them to the service level management server. In this way, the mobile terminal transmits the communication failure history to the service level management server in addition to the availability measurement information, so that the service level management server can easily identify the point where the mobile communication system has a problem in coverage. Therefore, it can be used to improve the service level.

Example 4

FIG. 14 shows the internal configuration of the mobile terminal 10 in the fourth embodiment of the present invention. The difference from the second embodiment is that the mobile terminal 10 includes a service quality measuring means 211 and a service quality recording means 212. The mobile terminal 10 stores area information in which the quality of the communication service is guaranteed in advance in the guaranteed area recording means 209. Here, only when the mobile terminal's own position is within the guaranteed area stored in the guaranteed area recording means 209, the service quality measuring means 211 is used to measure the communication service quality and the result is serviced. Stored in the quality recording means 212. The stored measurement information is transmitted to the service level management server at a predetermined transmission timing.

FIG. 15 shows the contents of the service quality record information 470 of the mobile terminal 10 in the fourth embodiment of the present invention. Each row is a statistical item to be acquired. In this example, four types of call connection request count 481, call connection success count 482, communication normal completion count 484, and communication error completion count 485 are used. Each column is a service available to subscribers, and four types are defined: circuit-switched voice call, circuit-switched videophone, circuit-switched data transfer, and packet-switched data transfer. Each statistical item is collected for each of these services.

FIG. 16 shows the internal configuration of the service level management server 100 in the fourth embodiment of the present invention. The difference from the first embodiment is that the communication service quality measurement result input means 308, the communication service quality statistical information update means 309, the communication service quality statistical information holding means 310, the communication service quality comparison means 311, the communication service quality assurance level The storage means 312 is provided.

When the service level management server 100 receives the communication service quality measurement result of the mobile terminal via the transceiver 300, the data transfer unit 301 and the communication service quality measurement result input unit 308, the communication service quality statistical information update unit 309 updates the availability statistics information for the subscriber and stores it in the communication service quality statistics information holding means 310.

[0066] Further, the communication service quality comparison means 311 obtains the communication service quality level for each service class previously stored in the communication service quality assurance level storage means 312 and the communication service quality statistical information measured for each subscriber. As a result of the comparison, if the communication service quality to be guaranteed is not satisfied or the quality margin is lowered, the service level violation warning display means 307 is instructed to display a service level violation warning. Further, when the communication service quality comparison unit 311 detects a mobile terminal that does not satisfy the required communication quality or has a reduced quality margin, the network management device notification unit 313 performs wireless communication with the mobile terminal in order to improve the communication quality. Notify the network management device 90 to increase the priority of resource allocation.

FIG. 17 shows a communication service of the service level management server 100 in the fourth embodiment of the present invention. The contents of the ibis quality statistics 600 are shown.

[0068] For each subscriber ID for identifying a subscriber, a service class 610, communication service quality measurement value 620, and communication service quality history information 630 contracted by the subscriber are stored. The communication service quality history information 630 holds the contents of communication service quality received from the mobile terminal, and the contents are a summary of communication service quality measurement information received by a plurality of mobile terminals. Based on the communication service quality measurement information, communication service quality measurement result 620 is calculated. For example, if the call setup completion rate 641 and the communication normal completion rate 642, the number of call connection requests 661, the number of successful call connections 662, the number of normal communication completions 663, the number of communication abnormal completions 664

Call setup completion rate = number of successful call connections / number of call connection requests

Communication normal completion rate = Communication normal completion count / (Communication normal completion count + Communication abnormal completion count).

FIG. 18 shows the contents of the communication service quality assurance level information 700 of the service level management server 100 in the fourth embodiment of the present invention. The quality assurance item 720 of the communication service is defined for each service class, like the availability guarantee level information 540 in the first embodiment of the present invention shown in FIG. In this example, there are only two types of guaranteed items: call setup completion rate 721 and normal communication completion rate 723.

FIG. 19 shows a state transition diagram related to communication service quality measurement of the mobile terminal 10 in the fourth embodiment of the present invention. Since communication service quality is basically measured only in a communicable state, it is not necessary to have the communication failure state in the state transition diagram of the second embodiment shown in FIG. When a communication event occurs in in-area state 842, the communication service quality statistics are updated. On the other hand, in the out-of-area state 843, even if a communication event occurs, the communication service quality statistics are not updated. When the measurement result transmission timing arrives, the measurement end time Te is recorded, the measurement result is transmitted to the service level management server, and the measurement start time Ts is recorded to prepare for the next period measurement.

FIG. 20 shows an operation flow of communication service quality statistical information update processing of the service level management server 100 in the fourth exemplary embodiment of the present invention. Service level management server When the mobile terminal power receives the communication service quality measurement result (step 941), it first obtains the subscriber ID of the mobile terminal (step 942) and obtains the measured communication service quality history information from the communication service quality information holding means. (Step 943). Next, based on the received measurement results, the communication service quality measurement value and communication service quality history information are updated (step 944), and the communication service quality measurement value and communication service quality updated in the communication service quality information holding means are updated. The history information is output (step 945) and the process is terminated (step 94 6).

FIG. 21 shows an operation flow of the communication service quality comparison process of the service level management server 100 in the fourth embodiment of the present invention. First, subscriber information is sequentially selected from the top row of the communication service quality statistical information holding means (step 961), and the service class to which the subscriber belongs is acquired (step 962). If the service class obtained here is j, then the communication service quality assurance level storage means and the communication service quality assurance level information for service class j are referred to (step 963), and during the subscriber monitoring period. The communication service quality of the communication service is compared with the guaranteed communication service quality of service class j (step 96 4).

[0073] If the communication service quality to be guaranteed is satisfied with a margin (step 965), the process returns to step 961 to process the next subscriber. On the other hand, if the guaranteed communication service quality is not satisfied or the margin of the communication service quality has decreased (step 965), the subscriber's service level violation warning is output to the service level violation warning display means (step 966). Output to the network management device notifying means so as to increase the radio resource allocation priority of the subscriber (step 967).

When the comparison processing for all subscribers is completed, the processing is terminated (step 968). By using the service level management system according to the fourth embodiment of the present invention, even when there is a dead zone in the service area or when a failure occurs in the radio base station, communication of the communication service is performed on the mobile terminal side. By measuring service quality and automatically reporting to the management server, the service level of communication services can be efficiently inspected and maintained on a subscriber-by-subscriber basis.

Claims

The scope of the claims

[1] a means of measuring the availability of communication services with the power on;

Means for transmitting the measured result to a management server via a mobile communication network. A mobile terminal of a service level management system, comprising:

[2] comprises means for measuring self-position,

2. The mobile terminal of the service level management system according to claim 1, wherein the availability of the communication service is measured only when located in a predetermined area.

[3] means for measuring self-position;

When the communication service becomes unavailable while the power is on, the communication failure information including the time when the communication service becomes unavailable, the self-location information at that time, and the previous radio wave condition is displayed. Means for recording;

A mobile terminal of a service level management system, comprising means for transmitting the communication failure information to a management server via a mobile communication network after the communication service becomes available again.

[4] The mobile terminal of the service level management system according to claim 3, wherein the communication failure information is recorded only when located in a predetermined area.

[5] means for measuring self-position;

Only when the mobile terminal is in a predetermined area, for each communication service used by the mobile terminal during the predetermined measurement period,

Number of call connection requests, or

Number of successful call connections, or

Average call setup time, or

Number of successful communication completions, or

Communication error completion count, or

Average transfer rate, or

Average amount of forward delay, or Average forward delay jitter, or

Average frame loss rate,

Means for measuring communication service quality including one or more of:

A mobile terminal of a service level management system, characterized by comprising means for transmitting a measurement result to a management server via a mobile communication network.

[6] A service level management system management server that guarantees the availability of communication services provided by mobile carriers to mobile terminals,

Means for receiving mobile terminal power communication service availability measurement results;

Means for comparing each received measurement result with the available rate to be guaranteed;

Service level management characterized by having a means for detecting and displaying a service level violation warning for the mobile terminal when the measurement result falls below the available rate to be guaranteed or when the margin of availability is reduced server.

[7] A service level management system management server that guarantees the availability of communication services provided by mobile carriers to mobile terminals,

A means for notifying the mobile communication network so as to increase the priority of radio resource allocation to the mobile terminal when the measurement result falls below the available rate to be guaranteed or when the margin of the available rate decreases. A service level management server characterized by that.

[8] A service level management system management server that guarantees the quality of communication services provided to mobile terminals by mobile carriers.

Means for receiving communication service quality measurement results from a mobile terminal;

A means for comparing each received measurement result with the communication service quality to be guaranteed, and when the measurement result is lower than the communication service quality to be guaranteed or when the quality margin decreases, the service level for the mobile terminal concerned And a means for detecting and displaying a violation warning.

[9] A service level management system management server that guarantees the quality of communication services provided to mobile terminals by mobile carriers. Means for receiving measurement results of communication service quality from the mobile terminal, means for comparing each received measurement result with the communication service quality to be guaranteed, and if the measurement result is lower than the communication service quality to be guaranteed, or A service level management server comprising means for notifying a mobile communication network so as to increase the priority of radio resource allocation to the mobile terminal when the quality margin is lowered.

[10] The mobile terminal measures the availability of the communication service or the quality of the communication service,

A service level management system for transmitting a measurement result to a mobile terminal power management server via a mobile communication network,

A mobile terminal according to any one of claims 1 to 5,

A service level management system comprising: the management server according to claim 6.

[11] The mobile terminal according to any one of claims 1 to 5 measures a communication service availability rate or a communication service quality,

A service level management method, comprising: transmitting a measurement result from a mobile terminal to a management server according to any one of claims 6 to 9 via a mobile communication network.

[12] A service level management program for causing a computer to realize each means of the mobile terminal according to any one of claims 1 to 5.

[13] A service level management program for causing a computer to realize each means of the management server according to any one of claims 6 to 9.