WO2013108819A1 - 無線通信システム、無線局、無線端末、ネットワーク運用管理装置、及び、通信品質確認方法 - Google Patents
無線通信システム、無線局、無線端末、ネットワーク運用管理装置、及び、通信品質確認方法 Download PDFInfo
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- WO2013108819A1 WO2013108819A1 PCT/JP2013/050760 JP2013050760W WO2013108819A1 WO 2013108819 A1 WO2013108819 A1 WO 2013108819A1 JP 2013050760 W JP2013050760 W JP 2013050760W WO 2013108819 A1 WO2013108819 A1 WO 2013108819A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0888—Throughput
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
- H04L41/5061—Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the interaction between service providers and their network customers, e.g. customer relationship management
- H04L41/5067—Customer-centric QoS measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
Definitions
- the present invention relates to a wireless communication system having a function that a wireless station causes a wireless terminal to acquire and collect measurement information.
- MDT Minimization of Drive Test
- UMTS Universal Mobile Telecommunication System
- LTE Long Term Evolution
- Non-Patent Document 1 defines the following two methods for acquiring and reporting measurement information by a wireless terminal.
- Immediate MDT Get and report measurement information while the wireless terminal is active. Sometimes abbreviated as IMM MDT.
- Logged MDT The wireless terminal acquires idle measurement information, and reports the acquired measurement information during the active state. Sometimes abbreviated as LOG MDT.
- the network side decides which radio terminal should acquire and report measurement information, that is, control of measurement information acquisition and report by a network-led radio terminal is a basic policy, and non-patent literature The following two methods are defined in 2.
- A. Management based MDT First, an area to be collected of measurement information of MDT is specified, and an arbitrary wireless terminal is selected from wireless terminals staying in the area. Also called Area based MDT.
- a specific wireless terminal is selected based on the unique identifier (Identity: ID) of the wireless terminal.
- FIG. 15 An example of MDT defined in 3GPP.
- the LTE system assumed here is a wireless terminal (User Equipment: UE), a wireless base station (evolved NodeB: eNB), a wireless terminal mobility management apparatus (Mobility Management Entity: MME) / home subscriber management server (Home Subscriber) Server: HSS), network operation management device (Element Manager: EM), and information collection server (Trace Collection Entity: TCE).
- UE User Equipment
- eNB wireless base station
- MME Mobility Management Entity
- Home Subscriber Home Subscriber
- EM Home Subscriber
- TCE Transmission Collection Entity
- Step 1) EM is setting information (MDT measurement configuration) of wireless terminal (UE) measurement of MDT, target position information (Area scope) of MDT, basic trace information as information necessary to execute Management based Immediate MDT.
- the eNB is notified of an MDT Activation message including (TR: Trace Reference, TRSR: Trace Recording Session Reference) and the like.
- Step 2) The eNB confirms, in Evolved Packet Core (EPC) (particularly, HSS), a user consent regarding a position information report of the UE belonging to itself (User consent information retrieval).
- EPC Evolved Packet Core
- HSS HSS
- confirmation of User consent is performed via each interface from eNB to MME, and MME to HSS
- FIG. 15 instead of sequentially showing the interface (or message) of eNB and MME, MME and HSS, eNB To EPC (MME / HSS) as an interface (or message).
- MME / HSS eNB To EPC
- Step 3 The eNB starts a trace session for collecting MDT UE measurement information (Starting Trace Session), and transmits UE configuration information for Immediate MDT to the UE (Measurement configuration (IMM MDT)).
- the setting information includes, for example, a measurement target and a measurement cycle, and an instruction for reporting position information.
- Step 4) The UE performs measurement in a designated cycle, and reports measurement results and location information to the eNB.
- Step 5 After collecting (or during) the UE measurement information of a predetermined MDT, the eNB notifies the EPC (MME) of the identifier (that is, TR or TRSR) of the trace session.
- MME EPC
- Step 6 The EPC (MME) reports the corresponding UE type information (TAC: Type Allocation Code) and an identifier (that is, TR or TRSR) to the TCE.
- TAC Type Allocation Code
- Step 7) The eNB reports a trace record (Trace Record) in which the collected MDT UE measurement information is recorded to the TCE.
- the cell ID of the cell in which the wireless terminal is staying and the adjacent cell (Physical Cell Identity: PCI or E-UTRAN Cell Global Identity: ECGI), and transmission in each cell
- RSRP received power
- Reference Signal: RS Reference Signal
- Information consisting of a cell ID and received power may be called RF Fingerprint.
- time information (a relative time from an absolute time notified when the configuration of Logged MDT is received) is also stored.
- the wireless terminal acquires detailed location information regardless of the MDT while acquiring measurement information
- the detailed location information is also stored together and reported to the wireless base station.
- detailed location information for example, location information acquired by GNSS (Global Navigation Satellite System) represented by GPS (Global Positioning System), location information acquired by network location information service (Location Service: LCS), etc. There is.
- GNSS Global Navigation Satellite System
- GPS Global Positioning System
- LCS network location information service
- coverage mapping indicating the reception quality of the target area is performed on the network side without performing the manual driving test (or reducing the execution of the driving test) Can.
- coverage mapping can be performed more accurately if there are many reports with detailed location information.
- realization of coverage self-optimization as discussed in SON (Self-Organizing Network) can be expected.
- 3GPP TS 37.320 v 10. 3.0 Internet ⁇ URL> http: www.3 gpp. Org / ftp / Specs / html-info / 37320.htm
- 3GPP TS32.422v10.5.0 Internet ⁇ URL> http: www.3gpp.org/ftp/Specs/html-info/32422.htm
- 3GPP TS 36.331 v10.3.0 Internet ⁇ URL> http: www.3 gpp. Org / ftp / Specs / html-info / 36331.htm
- the measurement result of the wireless terminal and the position information at which the measurement is performed are associated one-to-one. That is, on the network side (for example, TCE), which measurement result is at which point can be easily grasped.
- TCE network side
- a case will be considered in which quality measurement related to communication quality between a radio station called QoS (Quality of Service) (for example, radio base station eNB or base station control station RNC) and a radio terminal is performed.
- QoS Quality of Service
- a wireless station or a wireless terminal may be considered as the entity that performs the quality measurement, but a case where the wireless station performs the quality measurement will be described as an example.
- the position of the wireless terminal may be information at the cell level, that is, which cell it is staying in, or may be information at a finer level, that is, where in the cell it is staying. is there.
- MDT generally has the purpose of utilizing it as a substitute for driving tests, and it is necessary to collect location information at a level finer than cells. Therefore, even when performing quality measurement related to QoS in the MDT, it is necessary to collect location information at a level finer than that of the cell.
- the wireless station instructs the wireless terminal to perform an Immediate MDT instruction, for example, to perform periodic measurement of reception quality (for example, RSRP or RSRQ) and obtain position information, and to report the measurement result of the reception quality and the position information.
- the wireless terminal periodically reports the measurement result of the reception quality and the acquired position information to the wireless station according to the instruction.
- the wireless station measures the quality of communication with the wireless terminal in parallel with the Immediate MDT.
- quality measurement for example, throughput measurement can be considered.
- the wireless station independently transmits the UE measurement information (that is, the reception quality measurement result and the position information) collected by Immediate MDT and the quality measurement result (for example, throughput) to the MDT information collection server (TCE).
- TCE MDT information collection server
- a quality measurement result for example, throughput
- the position information of the wireless terminal collected near the time when the quality measurement result was obtained the value at which time it was staying was determined It is conceivable to guess. For example, on the basis of the collected throughput and position information, a distribution map (mapping) is generated which indicates what degree of throughput can be obtained around what in the cell.
- the result of the quality measurement can not be effectively used only by the position information at the time when the wireless terminal moves during the quality measurement period and the measurement result is output (for example, predetermined calculation is completed). It occurs.
- the accuracy of the mapping is inferior to that expected.
- Such problems become more serious as the quality measurement period is longer and the moving speed of the wireless terminal is faster.
- the distance the wireless terminal moves in the throughput measurement period is about 240 m.
- the moving distance is approximately 550 m.
- the accuracy of the GPS position information is several meters to several tens of meters, it can not be considered that the wireless terminal has stayed at substantially the same position in the throughput mapping.
- this problem is particularly significant in a multi-vendor environment where radio stations of different vendors are mixed in the same radio communication system. That is, when the wireless stations of each vendor collect quality measurement and position information at any point in a unique manner, it is difficult for TCE to perform aggregation in consideration of each difference.
- the problem to be solved is that, when performing quality measurement related to quality of service (for example, QoS) in MDT, a method is required to associate the result of the quality measurement with the location information of the wireless terminal to be subjected to quality measurement. That is.
- QoS quality of service
- the present invention relates to a quality measuring means for performing quality measurement related to service quality in communication between a wireless terminal and a wireless station, and an information collecting means for collecting information on the position of the wireless terminal to be subjected to the quality measurement.
- the present invention is a wireless terminal in a wireless communication system which performs quality measurement related to quality of service in communication between a wireless terminal and a wireless station, and in a period when the quality measurement is performed, a predetermined condition is satisfied.
- Wireless terminal having position information reporting means for acquiring information on the position of and reporting the information on the acquired position to the radio station.
- the present invention is a wireless station in a wireless communication system which performs quality measurement related to service quality in communication between a wireless terminal and a wireless station, wherein the wireless terminal to be subjected to the quality measurement satisfies a predetermined condition.
- the wireless station includes means for instructing to acquire one or more pieces of information regarding the position at a given time, and means for associating the information regarding the position of the wireless terminal with the result of the quality measurement.
- the present invention is a network operation management apparatus in a wireless communication system that performs quality measurement related to quality of service in communication between a wireless terminal and a wireless station, including an instruction to perform the quality measurement and an execution period of the quality measurement. And an instruction to cause the wireless terminal to be subjected to the quality measurement to acquire one or more pieces of information on the position at the time when the predetermined condition is satisfied, the information on the position of the wireless terminal, and the result of the quality measurement It is a network operation management apparatus which has a means to perform the instruction
- the present invention performs quality measurement related to quality of service in communication between a wireless terminal and a wireless station, and acquires information on the position of the wireless terminal at the time when a predetermined condition is satisfied in the quality measurement execution period.
- the present invention in a network apparatus such as TCE, it is possible to easily grasp the result of quality measurement related to QoS collected by MDT as to the result of when the wireless terminal stays. Thus, it is possible to efficiently realize whether or not the desired QoS has been achieved.
- FIG. 5 is a sequence diagram showing operations of a wireless station and a wireless terminal in the first embodiment of the present invention.
- FIG. 5 is a sequence diagram showing operations of a wireless station and a wireless terminal in the first embodiment of the present invention. It is a sequence diagram which shows operation
- FIG. 1 is a configuration diagram of a first wireless communication system to which the present invention is applied.
- FIG. 2 is a block diagram of a radio terminal (UE) and a radio base station (eNB) in a first radio communication system.
- UE radio terminal
- eNB radio base station
- FIG. 2 is a block diagram of an information gathering server (TCE) in a first wireless communication system. It is a sequence diagram which shows operation
- TCE information gathering server
- a wireless communication system including a wireless station (for example, a wireless base station or a base station control station) and a wireless terminal as components.
- the wireless station or the wireless terminal has a function of performing quality measurement related to the quality of service in communication between the wireless station and the wireless terminal, and the wireless station is the wireless terminal.
- the wireless terminal has a function of instructing acquisition and report of information on the position of the wireless terminal, and has a function of acquiring information on the position of the wireless terminal and reporting to the wireless station.
- Quality of service is also called QoS (Quality of Service).
- the wireless station determines information on the position of the wireless terminal at the time of satisfying a predetermined condition and the result of the quality measurement in a quality measurement execution period related to quality of service (for example, QoS). Make an association.
- the wireless station relates to the position of the wireless terminal to be subjected to the quality measurement related to the quality of service (for example, QoS) when the predetermined condition is satisfied in the quality measurement execution period.
- the quality measurement related to the quality of service (for example, QoS) when the predetermined condition is satisfied in the quality measurement execution period.
- One or more pieces of information are acquired, an instruction to report information on the position is issued, and the information on the position collected from the wireless terminal is associated with the result of the quality measurement.
- the information on the position collected from the wireless terminal and the result of the quality measurement may be used as one set of information, and the identification information on the wireless terminal may be information on the position collected from the wireless terminal
- the information on the position collected from the wireless terminal may be associated with the result of the quality measurement by respectively associating the result of the quality measurement with the result of the quality measurement.
- the "information about position” for example, -Detailed location information acquired by GNSS (Global Navigation Satellite System) represented by GPS (Global Positioning System), -Detailed position information obtained based on differences in arrival timing of signals from a plurality of wireless stations in one wireless terminal known as OTDOA (Observed Time Difference Of Arrival), etc.
- the wireless terminal reports the accuracy of the detailed position information (that is, the positioning accuracy) together with the detailed position information.
- quality measurement related to quality of service can be considered both when the radio station performs and when the radio terminal performs.
- the execution period of quality measurement is, for example, ⁇ From the start to the end of quality measurement, ⁇ From the preparation period before the start of quality measurement to the end, ⁇ From the start of quality measurement to the post-processing period after the end, ⁇ From the preparation period before the start of quality measurement to the post-processing period after the end, Etc., but are not limited thereto.
- the post-processing period after the end of the quality measurement means, for example, the period required for the wireless terminal to acquire information on the position after the end of the quality measurement when the end of the quality measurement is a predetermined condition, for example.
- call connection delay means that when a certain wireless terminal establishes a wireless link connection with a wireless station or establishes a network connection, each connection establishment occurs after the initial access confirmation (or after the initial access process is completed). The time to completion, etc. can be considered.
- the handover delay may be, for example, the time from when the measurement report by the wireless terminal for handover is performed to when the handover is completed. The handover completion can be considered until the radio terminal completes handover or until the source radio station is notified of information from the target radio station indicating that the radio terminal has been handed over.
- “information on the position of the wireless terminal when the predetermined condition is satisfied” is, for example, ⁇
- an instruction is issued to the wireless terminal, and information regarding the position held by the wireless terminal when the instruction is received from the wireless station, ⁇
- an instruction is issued to the wireless terminal, and information on the position acquired (or acquired) by the wireless terminal when the instruction is received from the wireless station ⁇
- predetermined condition is, for example, Start or end (at least one) of quality measurements related to quality of service (eg QoS) Initiation and termination of quality measurements related to quality of service (eg QoS) ⁇ Predetermined cycle, ⁇ Acquisition (or update) of detailed location information by GPS or OTDOA, etc. ⁇ The handover has been triggered, ⁇ The occurrence of a call disconnection (also called Radio Link Failure: RLF) The reception quality of the serving cell (ie, the cell in which it is staying) has changed by a predetermined amount, Etc., but are not limited thereto.
- RLF Radio Link Failure
- the condition “start or end of quality measurement” it is decided to collect information on the position of the wireless terminal at least at the start or the end, thereby obtaining information on the position of the wireless terminal. And the quality measurement result can be clarified. In addition to clarifying the correspondence between the information on the position of the wireless terminal and the quality measurement result when using the condition “start and end of quality measurement”, how much the wireless terminal has moved, or Can obtain information such as how much the reception quality has changed during the quality measurement period.
- “at the start of quality measurement” is, for example, ⁇ At the start of the session targeted for quality measurement, ⁇ At the time of the first data transmission of the session targeted for quality measurement, ⁇
- ⁇ At the time of the first data transmission of the session targeted for quality measurement, ⁇
- QCI QoS Class Indicator
- the wireless terminal when using the “predetermined cycle” as the condition, for example, it is conceivable that the wireless terminal periodically acquires information on the position from the start of the quality measurement. As a result, when the wireless terminal moves largely during the quality measurement period, or when the reception quality greatly fluctuates, it is possible to grasp even a detailed movement path or a fluctuation state of the reception quality.
- the trigger of the handover has been triggered means, for example, that the condition regarding measurement report of reception quality specified in advance is satisfied, that the instruction of handover is transmitted or received, and the like.
- the quality measurement is interrupted because the wireless terminal performs handover during the quality measurement period, that is, in the middle of the quality measurement, the quality measurement results up to the handover point (that is, the intermediate results)
- Information on the location at the time of the handover can be collected.
- the predetermined condition determined in the wireless station may be used in combination with another predetermined condition determined in the wireless terminal, or a plurality of predetermined conditions may be used in combination in the wireless station or the wireless terminal.
- the points of stay of the wireless terminal are estimated by linear interpolation.
- a method may be considered in which the associated quality measurement result is mapped to the staying point of the wireless terminal at that point in time.
- the usage method of the information regarding a position is not limited to this, Various usage forms are possible.
- FIG. 1 to 4 are sequence diagrams showing an example of the basic operation of the wireless station and the wireless terminal in the wireless communication system of the present invention.
- FIG. 1 and FIG. 2 show an example in which the wireless station performs quality measurement related to service quality (for example, QoS)
- FIG. 3 and FIG. 4 show an example in which the wireless terminal performs the quality measurement.
- the wireless station 1 collects information on the position from the wireless terminal 2 when performing quality measurement related to quality of service (for example, QoS).
- the wireless station 1 starts quality measurement related to quality of service (for example, QoS) for the wireless terminal 2 (Step 101).
- the radio station 1 determines whether or not the predetermined condition is satisfied, and when it is determined that the predetermined condition is satisfied at a certain time (Step 102), instructs the wireless terminal 2 to report information on the position (Step 103).
- the wireless terminal 2 receives the instruction, the wireless terminal 2 obtains information on the position (Step 104), and reports information on the position obtained at a predetermined timing to the wireless station 1 (Step 105).
- the predetermined timing may be notified from the wireless station 1 at the time of a report instruction of information on the position, or may be notified to the wireless terminal 2 in advance. Then, the wireless station 1 ends the quality measurement related to the service quality (Step 106). The wireless station 1 associates the information on the position of the wireless terminal at the time when the predetermined condition is satisfied in the quality measurement execution period related to the service quality, with the result of the quality measurement (Step 107).
- the wireless station 1 collects information on the location from the wireless terminal when performing quality measurement related to quality of service (for example, QoS).
- the difference from FIG. 1 is that the wireless terminal 2 determines whether a predetermined condition is satisfied.
- the wireless station 1 starts quality measurement related to the quality of service (for example, QoS) for the wireless terminal 2 (Step 111).
- the wireless station 1 instructs the wireless terminal 2 to report information on the position (Step 112).
- the predetermined condition may be notified, or the predetermined condition may be notified to the wireless terminal 2 in advance.
- the predetermined condition may be defined in advance in the specification.
- the wireless terminal 2 determines whether or not the predetermined condition is satisfied, and when it is determined that the predetermined condition is satisfied at a certain time (Step 113), acquires information on the position (Step 114). Then, at a predetermined timing, information on the position is reported to the wireless station 1 (Step 115).
- the predetermined timing may be notified from the wireless station at the time of a report instruction of information on the position, or may be notified to the wireless terminal 2 in advance.
- the radio station 1 ends the quality measurement related to the service quality (Step 116).
- the wireless station 1 associates the information on the position of the wireless terminal at the time of satisfying the predetermined condition in the quality measurement execution period related to the service quality with the result of the quality measurement (Step 117).
- the wireless station 1 associates the result of the quality measurement with the information on the position collected from the wireless terminal 2.
- association refers to, for example, calling the information on the result of quality measurement and the location as one information element (eg, QoS Information Element) or QoS container (QoS container). Can be generated and stored, or the result of the quality measurement and the information on the position can be associated with a predetermined identifier and stored.
- the wireless station 1 may also transmit the information element, the linked quality measurement result, and the information on the position to the information collecting server or the upper network node.
- the association may be performed before the quality measurement ends, that is, while the quality measurement is performed.
- the wireless station when the wireless station performs quality measurement related to the quality of service (for example, QoS), it efficiently collects information on the position of the wireless terminal to be the target of the quality measurement, and the result of the quality measurement And information on the location of the wireless terminal can be clearly associated. Furthermore, the information collection server which collected the result of the quality measurement and the information on the position of the wireless terminal from the wireless station by this, the result of which quality measurement was the wireless terminal staying in which area (that is, which position) It is possible to understand if it is the result of time, and it is possible to use these information effectively.
- QoS quality measurement related to the quality of service
- the wireless station 1 collects, from the wireless terminal 2, the result of the quality measurement related to the quality of service (for example, QoS) and information on the position.
- the wireless station 1 instructs the wireless terminal 2 to execute quality measurement related to the quality of service (for example, QoS), report the result of the quality measurement, and obtain information on location and report (Step 201).
- indication of execution of quality measurement contains information, such as what, how, at what timing, in which period, perform the said quality measurement.
- the wireless terminal 2 starts quality measurement related to the quality of service (Step 202).
- the timing for starting quality measurement is specified by the wireless station 1 in the quality measurement instruction (Step 201), or has been notified to the wireless terminal 2 in advance, or is targeted (that is, executed).
- the measurement may be determined by something, etc.
- the radio terminal 2 determines whether or not a predetermined condition is satisfied during the quality measurement, and when the predetermined condition is satisfied (Step 203), acquires information on the position (Step 204).
- the wireless terminal 2 reports information on the acquired position to the wireless station 1 at a predetermined timing (Setp 205).
- the predetermined timing may be notified from the wireless station 1 at the time of a report instruction (Step 201) of information on position, or may be notified to the wireless terminal 2 in advance.
- the wireless terminal 2 reports the result of the quality measurement to the wireless station (Step 207).
- the wireless station 1 associates the information on the position of the wireless terminal at the time when the predetermined condition is satisfied in the quality measurement execution period related to the service quality with the result of the quality measurement (Step 208).
- the wireless station 1 collects, from the wireless terminal 2, the result of quality measurement related to the quality of service (for example, QoS) and information on the position.
- the wireless terminal 2 reports the information on the position together with the result of the quality measurement. That is, when the information on the position is acquired (Step 214), the information on the position is held, and after the quality measurement related to the service quality is finished (Step 215), the result is reported to the radio station 1 together with the result of the quality measurement. (Step 216).
- the wireless station 1 associates the information on the position of the wireless terminal at the time when the predetermined condition is satisfied in the quality measurement execution period related to the service quality with the result of the quality measurement (Step 217).
- the wireless station 1 associates the result of the quality measurement with the information on the position collected from the wireless terminal 2.
- association means, for example, generating and storing information on the result of quality measurement and information on location as one information element (for example, this can also be called a QoS information element), or This means that information about the result and the position is linked with a predetermined identifier and stored.
- the wireless station 1 may also transmit the information element, the linked quality measurement result, and the information on the position to the information collecting server or the upper network node.
- the association may be performed before the quality measurement ends, that is, while the quality measurement is performed.
- the wireless station 1 causes the wireless terminal 2 to perform quality measurement related to the quality of service (for example, QoS) and reports the result of the quality measurement
- the wireless terminal to be the target of the quality measurement Information on the location of 2 can be efficiently collected, and the result of the quality measurement can be clearly associated with the information on the location of the wireless terminal.
- the information collecting server that collects the result of the quality measurement and the information on the position of the wireless terminal 2 from the wireless station 1 thereby stays in the vicinity (that is, which position) of the result of the quality measurement. It is possible to grasp whether it is the result of the event and to use these information effectively.
- the advantage of allowing the wireless terminal 2 to determine whether or not the predetermined condition is satisfied is, for example, the reduction of the message instructing the wireless terminal 2 to acquire the information on the position from the wireless station 1 or the predetermined condition is satisfied. It is possible to reduce the gap (that is, the time difference) between the time point and the timing of acquiring information on the position.
- the following may be considered as another example regarding acquisition and reporting of information on the position of the wireless terminal 2 during quality measurement related to quality of service (for example, QoS).
- QoS quality of service
- the wireless terminal periodically acquires information on location and reports periodically
- the wireless terminal periodically obtains information on location and reports that a predetermined report trigger is applied
- the wireless terminal periodically acquires information on the position, and reports when it has moved for a predetermined distance or more since the previous acquisition, or from the previous report.
- the wireless terminal periodically acquires information on the position, and reports when it has acquired a predetermined number (or a predetermined amount) of packets (or data) since the previous acquisition or from the previous report.
- the wireless terminal acquires information on the position when a predetermined acquisition trigger is issued, and reports periodically.
- the wireless terminal acquires information on the location when the predetermined acquisition trigger is received, and reports that the predetermined report trigger is applied.
- the acquisition period and the reporting period of the information on the position may be the same or different.
- the predetermined report trigger may be notified in advance from the wireless station 1 to the wireless terminal 2 or may be received when the wireless terminal 2 receives a report instruction of information related to the position from the wireless station 1.
- the predetermined acquisition trigger may be notified in advance from the wireless station 1 to the wireless terminal 2 or may be received when the wireless terminal 2 receives an instruction from the wireless station 1 to obtain information on the position.
- the information on the position is acquired last time or compared with the time of previous report (for example, the movement distance, the number of packets, etc.), it is only after receiving the instruction to acquire the information on the position and reporting. Information on the acquired position may be reported. In addition, these are examples and do not necessarily need to be one of these.
- the result of quality measurement related to the quality of service (for example, QoS) can be easily grasped as the result of when the wireless terminal stays at. It is possible to efficiently realize whether the desired QoS is achieved or not.
- a wireless station e.g., a wireless base station eNB for LTE, a base station controller RNC or base station NB for UMTS
- a wireless terminal communicates between the wireless station and the wireless terminal
- the wireless station has a function to instruct the wireless terminal to acquire and report information on the position of the wireless terminal, and the wireless terminal acquires information on the position of the wireless terminal. And have a function to report to the radio station.
- Quality of service is also called QoS (Quality of Service).
- the wireless station determines information on the position of the wireless terminal at the time of satisfying a predetermined condition and the result of the quality measurement in a quality measurement execution period related to quality of service (for example, QoS). Make an association.
- the wireless station relates to the position of the wireless terminal to be subjected to the quality measurement related to the quality of service (for example, QoS) when the predetermined condition is satisfied in the quality measurement execution period.
- the quality measurement related to the quality of service for example, QoS
- One or more pieces of information are acquired, an instruction to report information on the position is issued, the information on the position collected from the wireless terminal is associated with the result of the quality measurement, and the information is transmitted to the information collection server.
- the information on the position collected from the wireless terminal and the result of the quality measurement may be transmitted to the information collecting server as one set of information, or the identification information of the wireless terminal may be wireless Information on the position collected from the wireless terminal is associated with the result of the quality measurement by respectively associating information on the position collected from the terminal with the result of the quality measurement, and information on the location collected from the wireless terminal and the result of the quality measurement It may be sent separately to the information collection server.
- the wireless terminal further has a function of acquiring measurement information specified by the wireless station and a function of reporting the acquired measurement information to the wireless station.
- acquisition method of measurement information and information related to position by the wireless terminal “acquisition and report on measurement information and position related information by the wireless terminal in Ministization of Drive Test (MDT)” defined in 3GPP is described. Assume. However, the present invention is not limited to this.
- MDT measurement MDT measurement
- MDT measurement report MDT measurement reporting
- MDT measurement logging recording (holding) of measurement information and information on position obtained by MDT measurement and MDT measurement
- ⁇ Detailed location information acquired by GNSS Global Navigation Satellite System represented by GPS
- ⁇ Detailed location information obtained by location information service (Location Service: LCS) such as OTDOA
- LCS Location Information service
- Received power (for example, RSRP or reception quality) of the downlink signal for example, pilot signal or reference signal
- ID of the cell for example, PCI or PSC
- Information on the reception power (or reception quality) of the downlink signal and the position according to the cell ID is also called RF Fingerprint.
- the wireless terminal reports the accuracy of the detailed position information (that is, the positioning accuracy) together with the detailed position information.
- the invention also contemplates also taking into account information on the state of the wireless network during the quality measurement when making quality measurements related to quality of service (e.g. QoS).
- QoS quality of service
- the core network load information is the load level of EPC (for example, MME, S-GW) or Core Network (CN) (for example, SGSN, GGSN) or the level of overload. It is information such as whether or not.
- the radio access network load information is the load of the RAN (for example, eNB, NB, RNC) (for example, radio resource usage rate (Physical Resource Block Usage), hardware load (Hardware Load)), network load (Transport Network Layer Load) (Composite Available Capacity), what level is it, whether it is overloaded (Overload), access restriction (Access Barring: AB, Access Class Barring: ACB) Whether the number of wireless terminals in active state (Number of Active UE) per cell, random received for a predetermined period per cell Access of the number of preamble (Number of Received Random Access Preambles), which is information such as.
- the radio bearer related information is, for example, how many radio bearers (RB) are used per cell, or how many radio access bearers (RAB) are placed per cell, etc. It is information.
- the radio bearer (RB) and the radio access bearer (RAB) may be information by type such as GBR (Guaranteed Bit Rate) or Non-GBR.
- wireless terminal information of each wireless terminal for example, Terminal specific information, ⁇ Moving speed related information ⁇ Radio link information, Etc., but are not limited thereto.
- the terminal-specific information includes radio terminal capability (UE Capability), radio terminal category (UE Category), access class (Access Class), and terminal type (for example, International Mobile Equipment Identifier as a terminal identifier: Type Allocation Code included in IMEI: TAC) and so on.
- the moving speed related information includes the moving speed measured by the radio terminal (UE) by itself, the moving speed of the UE estimated by the radio base station (eNB), the mobility state (Mobility state) of the own determined by the UE, and the eNB determines It is information such as mobility state of the UE being Mobility state is information defined at multiple levels such as Normal, Low, Medium, and High, for example, how many times the radio terminal (UE) has performed handover within a predetermined time, or how many times cell reselection is performed It is judged based on what you did.
- the radio link information may be the number of radio bearers used simultaneously (Number of RB), the number of cells used simultaneously (Number of Serving Cell), the number of component carriers used simultaneously (Number of Component Carrier), or , Whether or not a plurality of radio bearers are used, whether or not a plurality of cells or component carriers are used, or a channel quality indicator (CQI), or a radio station (for example, an eNB) , NB, RNC) (for example, Proportional Fairness: PF, Round Robin: RR), and the like.
- a technology using a plurality of cells and a plurality of component carriers is called carrier aggregation, and is a technology expected to have an effect of throughput improvement (that is, increase).
- HSDPA High Speed Downlink Packet Access
- HSUPA High Speed Uplink Packet Access
- the wireless station causes the wireless terminal to forcibly acquire the detailed position information using GPS, LCS or the like and report the detailed position information.
- detailed position information can be efficiently collected, and it can be expected that the accuracy of mapping with the result of quality measurement will be increased.
- information indicating whether or not the user who holds the wireless terminal is permitted to acquire detailed position information according to the instruction of the wireless station (for example, the user consent “Report of position information”
- the wireless station can forcibly instruct the wireless terminal to acquire and report detailed location information.
- the wireless terminal when the wireless terminal receives an instruction of forced acquisition of detailed location information and reporting by the wireless station, the instruction may be rejected. Possible reasons for refusal include, but are not limited to, the fact that the user has refused and the battery capacity of the wireless terminal is small.
- FIG. 5 is a diagram showing an example of a schematic configuration of a first wireless communication system according to an embodiment of the present invention.
- This first wireless communication system assumes 3GPP LTE, and a wireless terminal (UE) 10, a wireless base station (eNB) 11, a mobile terminal mobility management device (MME) / home subscriber management server (HSS) 12, a network operation management apparatus (EM) 13, and a collection server of information (Trace Collection Entity: TCE) 14.
- UE wireless terminal
- eNB wireless base station
- MME mobile terminal mobility management device
- HSS home subscriber management server
- EM network operation management apparatus
- TCE Collection Entity
- 6 to 8 are functional block diagrams of the radio terminal (UE) and each radio network node in the first radio communication system.
- FIG. 6 is a functional block diagram of the radio terminal (UE) 10 and the radio base station (eNB) 11.
- the radio terminal (UE) 10 executes measurement based on the radio signal receiver 101 that receives a radio signal from the radio base station (eNB) 11, a demodulator 102 that demodulates the received radio signal, and the demodulated information.
- the control unit 103 that controls the operation of the UE, a measurement unit 104 that performs measurement based on an instruction from the control unit 103 and the received wireless signal, and a signal generation unit 105 that generates a transmission signal from measurement results and information data.
- a wireless signal transmitter 106 that wirelessly transmits a transmission signal.
- the radio base station (eNB) 11 includes a radio signal receiver 111 that receives a radio signal from the radio terminal (UE) 10, a demodulator 112 that demodulates the received radio signal, and measurement information that stores the demodulated measurement information.
- a transmission unit 114 that transmits uplink data and measurement information received from the UE 10 to a higher station (for example, MME, EM and TCE), a reception unit 115 to receive a signal from the higher station, and the UE 10
- Control unit 116 controls transmission of measurement information to the upper station and signal generation unit 117 that generates a transmission signal to UE 10; radio signal transmitter 118 that transmits a radio signal to UE 10; Etc.
- FIG. 7 is a functional block diagram of mobility management device (MME) of wireless terminal / home subscriber management server (HSS) 12 and EM 13.
- the MME / HSS 12 includes a reception unit 121 that receives a signal from a radio base station (eNB), a transmission unit 122 that transmits a signal to the eNB, a control unit 123 that controls various functions, and a radio terminal (UE) 10.
- Terminal authentication unit 124 that authenticates the mobile terminal
- the wireless terminal movement management unit 125 that manages the movement of the UE 10
- EM network operation management apparatus
- EM network operation management apparatus
- the network operation management apparatus (EM) 13 includes a receiver 131 that receives a signal from the radio base station (eNB) 11 and the MME / HSS 12, a transmitter 132 that transmits a signal to the eNB 11 and the MME / HSS 12, and control related to MDT. And the like.
- MME / HSS 12 is described in the same block diagram for convenience in FIG. 7, it can also be shown as a block diagram as an independent node, and the implementation of the present invention is possible in either case.
- FIG. 8 is a functional block diagram of the trace information collection device (TCE) 14.
- the TCE 14 includes a receiving unit 141 that receives a signal from the radio base station (eNB) 11 and an upper network node (MME / HSS 12 and EM 13), a transmitting unit 142 that transmits a signal to the eNB 11 and an upper network node, and a wireless terminal (UE)
- wireless terminal trace control part 143 which performs tracing (tracking management) of 10
- MDT measurement information collection part 144 which collects MDT measurement result, etc. are comprised.
- FIG. 9 is a sequence diagram showing operations of the radio base station (eNB) 11 and the radio terminal (UE) 10 in the third embodiment of the present invention.
- a quality measurement related to quality of service for example, QoS
- QoS quality measurement related to quality of service
- throughput for each user is simply referred to as throughput unless otherwise noted
- throughput for each user of downlink data
- eNB11 makes UE10 acquire the information regarding a position at the time of the measurement start of a throughput, and completion
- the eNB 11 receives an instruction to perform throughput measurement by the MDT from the upper network (for example, the EM 13 or the EPC 14).
- the eNB 11 recognizes that the UE 10 under the control of itself has received downlink data (Step 301: DL data arrival). Here, it is assumed that the UE 10 is already in the active state (that is, in the RRC_Connected state). Next, the eNB 11 starts measuring the downlink data throughput of the UE 10, and starts a trace session (Trace Session) for information collection by the MDT (Step 302: Start QoS measurement and Trace Session).
- Step 301 DL data arrival
- the eNB 11 starts measuring the downlink data throughput of the UE 10, and starts a trace session (Trace Session) for information collection by the MDT (Step 302: Start QoS measurement and Trace Session).
- the eNB 11 starts transmission of downlink data (that is, packets) to the UE 10 (Step 303: DL data (first piece of data), execution of MDT measurement report (that is, measurement of reception quality and acquisition of information on location, and (Step 304: Measurement configuration (Immediate MDT))
- Step 303: DL data (first piece of data) execution of MDT measurement report (that is, measurement of reception quality and acquisition of information on location
- Step 304 Measurement configuration (Immediate MDT)
- an instruction to execute the MDT measurement report once is issued, and the UE 10 performs MDT measurement according to the instruction (Step 305: MDT).
- Step 306 MDT measurement report
- eNB 11 saves the result of MDT measurement reported from UE 10 (Step307: Store reported MDT measurement results)
- the eNB appropriately transmits the remaining downlink data to the UE (Step 308: DL data), and when the last downlink data transmission is completed (Step 309: DL data (last piece of data), the eNB 11 instructs the UE 10 to execute MDT measurement again (Step 310: Measurement configuration (Immediate MDT))
- the UE 10 performs MDT measurement according to the instruction (Step 311: MDT measurement), and the result of the MDT measurement is It reports to eNB11 (Step 312: MDT measurement report) eNB11 is UE. 0 to save the results of the reported MDT measurement from (Step313: Store reported MDT measurement results) .eNB ends the throughput measurement, save the results (Step314: Finish QoS measurement).
- the eNB 11 adds a common identifier (for example, Trace Reference ID) to associate information on the position of the UE 10 with the measurement result of the throughput, or generates one information element including information on the measurement result of the throughput and the position of the UE 10 And / or both to transmit the throughput measurement result and information on the position of the UE 10 to the TCE (not shown). Further, the eNB further measures information on QoS (for example, QoS Class Indicator: QCI) targeted for quality measurement, reception quality of a serving cell or an adjacent cell measured by UE 14 targeted for quality measurement, and the reception quality concerned. It is also conceivable to transmit information on the time of day to TCE.
- QoS for example, QoS Class Indicator: QCI
- the radio base station (eNB) 11 performs quality measurement (for example, throughput measurement) related to the quality of service (for example, QoS)
- the radio terminal (UE) 10 that is the target of the quality measurement Information on the location of the wireless terminal (UE) 10 can be collected efficiently, and the result of the quality measurement can be clearly associated with the information on the location of the wireless terminal (UE) 10.
- the information collection server (TCE) 14 that has collected information on the result of quality measurement and the position of the radio terminal (UE) 10 from the radio base station (eNB) 11 determines which quality measurement result is the radio terminal ( UE) It is possible to grasp which area (that is, at which position) the result is obtained when 10 was staying, and it is possible to effectively use these pieces of information.
- a UE in the RRC_Connected state may perform Logged MDT.
- the UE may acquire and hold information on the positions at both the start and end times of the throughput measurement and collectively report the information to the eNB 11 later.
- the throughput up to the handover execution point may be measured.
- the handover point is the point in time when the UE 10 transmits a handover instruction (RRC Connection Reconfiguration or Handover command) that satisfies the condition of the measurement report (Measurement report) for handover, the UE 10 performs the handover instruction.
- RRC Connection Reconfiguration or Handover command a handover instruction that satisfies the condition of the measurement report (Measurement report) for handover
- the UE 10 performs the handover instruction. When received, etc. can be considered.
- the result of the throughput measurement may be set to an invalid value and transmitted to the TCE 14 instead of the throughput measurement result up to the handover execution time point.
- the throughput measurement result may be set as an invalid value and transmitted to the TCE.
- a possible method is to estimate the staying point of the wireless terminal and map the quality measurement result (that is, the throughput value) to the staying point.
- the received power (or received quality) of each cell is averaged for each predetermined period during quality measurement, and the averaged received power (or received quality) is calculated. It is conceivable to map quality measurement results (that is, throughput values) to the coverage map based. However, there is no limitation to this, and various usage forms are possible.
- ⁇ Modified Example 1 of Third Embodiment> throughput measurement is assumed as quality measurement related to quality of service (for example, QoS), and the radio terminal (UE) 10 acquires and reports information on the position at the start and end of the throughput measurement.
- QoS quality measurement related to quality of service
- UE 10 acquires and reports information on the position at the start and end of the throughput measurement.
- the other operations are basically the same as those of the third embodiment, and the description thereof will be omitted as appropriate.
- the radio base station (eNB) 11 first, upon receiving downlink data to be transmitted to the subordinate radio terminal (UE) 10, the radio base station (eNB) 11 starts throughput measurement for the UE 10, and the UE 10 To get and report information on location. Furthermore, the eNB 11 instructs the UE 10 to report the detailed position information when the detailed position information is acquired by GPS or LCS. The instruction may be issued as an instruction to execute the MDT measurement report of Immediate MDT, or may be issued using another new message. The UE 10, when acquiring detailed location information during throughput measurement in the eNB 11, reports to the eNB 11. It is not necessary to recognize that the UE 10 is measuring the throughput, and the eNB 11 may release (or cancel) the corresponding instruction after the end of the throughput measurement.
- maintains the acquired detailed positional information and reports to eNB11 with a predetermined
- throughput measurement is assumed as quality measurement related to quality of service (for example, QoS), and information on the position of the radio terminal (UE) 10 at the start and end of the throughput measurement is collected.
- quality measurement related to quality of service for example, QoS
- information on the position of the radio terminal (UE) 10 at the start and end of the throughput measurement is collected.
- the radio terminal (UE) 10 acquires detailed position information by GPS or LCS during the throughput measurement period
- the radio base station (eNB) 11 reports them. If the UE did not acquire detailed location information during the throughput measurement period, the UE is caused to obtain and report information on the location at the end of the throughput measurement.
- the other operations are basically the same as those of the third embodiment, and the description thereof will be omitted as appropriate.
- the radio base station (eNB) 11 first, upon receiving downlink data to be transmitted to the subordinate radio terminal (UE) 10, the radio base station (eNB) 11 starts throughput measurement for the UE 10, and the UE Also, when detailed position information is acquired by GPS or LCS, an instruction is given to report the detailed position information.
- the instruction may be issued as an instruction to execute the MDT measurement report of Immediate MDT, or may be issued using another new message.
- the UE 10 when acquiring detailed location information during throughput measurement in the eNB 11, reports to the eNB 11. The UE does not necessarily have to recognize that the throughput is being measured, and the eNB 11 may release (or cancel) the corresponding instruction after the throughput measurement is completed.
- maintains the acquired detailed positional information and reports to eNB11 with a predetermined
- the eNB 11 instructs acquisition of information on the position if the detailed report of the position information is not received from the UE 10 during the throughput measurement period, and the UE 10 acquires the information on the position acquired according to the instruction.
- the eNB 11 when the eNB 11 does not acquire the detailed position information in advance for the predetermined period, the eNB 11 instructs the UE 10 to acquire and report the information on the position after the end of the predetermined period. Also good.
- the information on the position instead of having the radio terminal (UE) 10 acquire and report information on the position at the end of throughput measurement, the information on the position may be reported to the UE at the start of throughput measurement in advance.
- the (downlink) throughput is used as an example as the quality measurement related to the quality of service (for example, QoS), but the same applies to other quality measurements. Needless to say, it can be done.
- QoS quality of service
- FIG. 10 is a sequence diagram showing operations of the radio base station (eNB) 11 and the radio terminal (UE) 10 in the fourth example of the present invention.
- the measurement of the packet loss rate of downlink data and the measurement of the packet discard rate of downlink data are performed as quality measurement related to the quality of service (for example, QoS).
- QoS quality measurement related to the quality of service
- the eNB 11 causes the UE 10 to periodically acquire and report information on the position during the quality measurement period, that is, during the measurement period of the packet loss rate and the packet loss rate.
- the eNB 11 reports, to the information collecting server (TCE) 14 of the MDT, the measurement results of the packet loss rate and the packet discard rate and the information on the position reported from the UE during the measurement period.
- TCE information collecting server
- the eNB 11 receives an instruction from the upper network (for example, EM or EPC) to measure the packet loss rate and measure the packet discard rate by the MDT.
- the eNB 11 recognizes that the UE 10 under the control of itself has received downlink data (Step 401: DL data arrival). Here, it is assumed that the UE 10 is already in the active state (that is, in the RRC_Connected state). Next, the eNB 11 starts measurement of the packet loss rate and packet discard rate of the downlink data of the UE 10, and starts a trace session (Trace Session) for information collection by MDT (Step 402: Start QoS measurement and Trace Session) .
- Step 401 DL data arrival
- the eNB 11 starts measurement of the packet loss rate and packet discard rate of the downlink data of the UE 10, and starts a trace session (Trace Session) for information collection by MDT (Step 402: Start QoS measurement and Trace Session) .
- the eNB starts transmission of downlink data (that is, packets) to the UE (Step 403: DL data (first piece of data), execution of MDT measurement report (that is, measurement of reception quality and acquisition of information on location, and ) (Step 404: Measurement configuration (Immediate MDT)).
- the UE 10 executes the MDT measurement in a predetermined cycle designated in Step 404, reports the measurement result of the reception quality and the information on the position to the eNB 11, and the eNB 11 stores the reported MDT measurement result (Step 405: MDT measurement) , Report (UE) and Store (eNB11)).
- the eNB 11 continues to transmit downlink data (Step 406: DL data), and the UE 10 executes MDT measurement report at a predetermined cycle (Step 407: MDT measurement, report (UE) and Store (eNB)).
- Step 408 DL data (last piece of data)
- the eNB 11 ends the measurement of the packet loss rate and the packet discard rate, and stores the result (Step 409: Finish QoS measurement).
- Step 409 Finish QoS measurement
- the information of the MDT measurement report from the UE immediately after the end of the quality measurement is stored (Step 410: MDT measurement, report (UE) and Store (eNB)).
- the eNB 11 adds a common identifier (for example, Trace Reference ID) that associates the measurement result of the packet loss rate and the packet discard rate with the information on the position of the UE 10 or measures the packet loss rate and the packet discard rate And one or more information elements including information on the location of the UE and the UE, and transmit information on the measurement results of the packet loss rate and the packet discard rate and the location of the UE 10 to the TCE 14 (not shown) ).
- a common identifier for example, Trace Reference ID
- the MDT measurement report collected immediately before the end of the quality measurement may be reported to the TCE 14 immediately after the end of the quality measurement.
- the radio base station (eNB) 11 performs quality measurement (for example, measurement of packet loss rate and packet discard rate) related to quality of service (for example, QoS)
- quality measurement for example, measurement of packet loss rate and packet discard rate
- QoS quality of service
- the information on the position of the wireless terminal (UE) 10 can be efficiently collected, and the result of the quality measurement can be clearly associated with the information on the position of the wireless terminal (UE) 10.
- the information collection server (TCE) 14 that has collected information on the result of quality measurement and the position of the radio terminal (UE) 10 from the radio base station (eNB) 11 determines which quality measurement result is the radio terminal ( UE) It is possible to grasp which area (that is, at which position) the result is obtained when 10 was staying, and it is possible to effectively use these pieces of information.
- a UE in the RRC_Connected state may perform Logged MDT.
- the eNB instructs Logged MDT at the start (or before the start) of the measurement of the packet loss rate and the packet discard rate, and at the end (or at a predetermined timing before the end) You may make it report to.
- the packet loss rate and packet discard up to the handover execution time point The rate may be measured.
- the handover point is the point in time when the UE 10 transmits a handover instruction (RRC Connection Reconfiguration or Handover command) that satisfies the condition of the measurement report (Measurement report) for handover, the UE 10 performs the handover instruction. When received, etc. can be considered.
- the measurement results of the packet loss rate and the packet discard rate may be invalidated and transmitted to the TCE 14 instead of the measurement results up to the handover execution time point.
- the measurement result may be set as an invalid value and transmitted to the TCE 14.
- wireless network information and “wireless terminal information” are collected from measured values of packet loss rate and packet discard rate, and UE. By reporting to TCE 14 in addition to information on location etc., it can be expected that the quality measurement will be more meaningful.
- linear interpolation is performed on the detailed position information collected during the quality measurement period, and during the quality measurement (in the fourth embodiment, the packet loss rate and the packet loss rate). It is conceivable to estimate the staying point of the wireless terminal during the measurement period of (1) and map the quality measurement result (that is, the packet loss rate and the packet discarding rate) to the staying point. However, there is no limitation to this, and various usage forms are possible.
- measurement of packet loss rate and packet discard rate is assumed as quality measurement related to quality of service (for example, QoS), and it is periodically related to the position of the radio terminal (UE) 10 during the measurement period.
- the information is acquired and reported, and the radio base station (eNB) 11 transmits them to the information collection server (TCE) 14.
- the UE 10 reports the eNB 11 to the TCE 14.
- the information on the location of is selected from among those periodically collected.
- an operation performed by the radio base station (eNB) 11 from the start to the end of the measurement of the packet loss rate and the packet discard rate, and the radio terminal (UE) 10 in the relevant period The operation to be performed is basically the same as that of the fourth embodiment. Then, among the MDT measurement reports collected during the measurement period of the packet loss rate and the packet discard rate, the eNB 11 performs MDT of a predetermined cycle different (for example, longer) from the cycle instructed by the Immediate MDT to the UE 10 The information included in the measurement report is selected and sent to the TCE 14 together with the packet loss rate and packet loss rate measurement results.
- the method of selecting information by the eNB 11 is not limited to periodic selection, and may be performed based on how much the UE 10 has moved, how much data (that is, packets) has been transmitted, etc. .
- the selection is made each time the UE 10 moves a predetermined distance or more or every time the reception quality of the serving cell changes by a predetermined value or more. I can think of a method.
- the method of selecting every time it transmits data of predetermined amount to UE10 except the information regarding the position collected at the first time can be considered.
- the packet loss rate and the packet discard rate are measured as quality measurement related to the quality of service (for example, QoS), and the period from the radio terminal (UE) 10 during the measurement period.
- the radio base station (eNB) 11 performs selection based on the information related to the collected positions and transmits them to the information collection server (TCE) 14.
- the selection is performed.
- UE10 performs. For example, a method may be considered in which the eNB 11 notifies the UE 10 of information serving as a selection criterion, and reports information related to the location only when the selection criterion is met.
- (downlink) packet loss rate and packet discard rate are used as an example of quality measurement related to quality of service (for example, QoS), but other quality measurements may be used. It goes without saying that the same can be applied to the case.
- QoS quality measurement related to quality of service
- FIG. 11 is a sequence diagram showing operations of the radio base station (eNB) 11 and the radio terminal (UE) 10 in the fifth example of the present invention.
- the measurement of throughput of uplink data is performed as a quality measurement related to the quality of service (for example, QoS).
- QoS quality measurement related to the quality of service
- various definitions of throughput can be considered, the scope of the present invention is not limited by the definition and can be applied to all.
- eNB11 makes UE10 acquire the information regarding a position at the time of the measurement start of the throughput by UE10, and completion
- the quality measurement at the start of measurement, at the start of a session to be subjected to the quality measurement (at Bearer setup), or at the first data transmission / reception of the session (that is, transmission or reception by eNB11, transmission by UE10 or transmission by UE10) Reception) or when data belonging to a predetermined QoS (or QoS group, QCI) occurs, or when data belonging to a predetermined QoS (or QoS group, QCI) is transmitted, or It can be considered when data is generated in a logical channel group (LCG) (that is, data is available), or when data of a predetermined LCG is transmitted.
- LCG logical channel group
- the upper network for example, the EM 13 or EPC 14
- the UE 10 recognizes that uplink data is generated (Step 501: UL data arrival), and sends a scheduling request for uplink radio resources to the eNB 11 (Step 502: Scheduling request (Buffer status report)).
- Step 501 UL data arrival
- Step 502 Scheduling request (Buffer status report)
- BSR buffer status report
- the eNB 11 starts a trace session (Trace Session) for information collection by the MDT in order to cause the UE 10 to start the throughput measurement of uplink data of the UE 10 (Step 503: Start Trace Session), and executes the MDT measurement report (That is, measurement of reception quality and acquisition of information on location, and reports thereof) (Step 504: Measurement configuration (Immediate MDT)).
- Step 505 Start QoS measurement.
- the eNB 11 notifies the UE 10 of uplink radio resource allocation (Step 506: UL scheduling grant), and the UE 10 starts transmission of uplink data accordingly (Step 507: UL data (first piece of data)).
- the UE 10 performs MDT measurement immediately after the first uplink data transmission, reports the measurement result of the reception quality and the acquisition result of the information on the position to the eNB 11, and the eNB 11 stores the reported information (Step 508: MDT measurement, report (UE) and Store (eNB)).
- Step 508 MDT measurement, report (UE) and Store (eNB)
- the execution of the MDT measurement may be performed immediately before or at the time of transmission, not immediately after the first uplink data transmission.
- the UE 10 continues transmitting uplink data (Step 509: UL data).
- Step 510 UL data (last piece of data)
- the UE 10 measures the throughput of the uplink data (Step 511: Finish QoS measurement).
- the MDT measurement is performed, the measurement result of the reception quality, the acquisition result of the information on the position, and the measurement result of the throughput are reported to the eNB 11, and the eNB 11 stores the reported information (Step 512: MDT measurement, report w / QoS measurement result (UE) and Store (eNB)).
- the UE 10 may be executed immediately before or at the time of transmission, not immediately after the last uplink data transmission is completed.
- the eNB 11 adds a common identifier (for example, Trace Reference ID) to associate information on the position of the UE 10 with the measurement result of the throughput, or generates one information element including information on the measurement result of the throughput and the position of the UE 10 And / or both to transmit the throughput measurement result and information on the position of the UE 10 to the TCE 14 (not shown). Further, the eNB further measures information on QoS (for example, QoS Class Indicator: QCI) targeted for quality measurement, reception quality of a serving cell or an adjacent cell measured by a UE targeted for quality measurement, and the reception quality. It is also conceivable to transmit to the TCE 14 information relating to the time of day when it occurred.
- a common identifier for example, Trace Reference ID
- QCI QoS Class Indicator
- the radio base station (eNB) 11 causes the radio terminal (UE) 10 to perform quality measurement (for example, uplink throughput measurement) related to the quality of service (for example, QoS), the quality measurement It is possible to efficiently collect information on the position of the wireless terminal (UE) 10 that performs the above, and to clearly associate the information on the position of the wireless terminal (UE) 10 with the result of the quality measurement.
- quality measurement for example, uplink throughput measurement
- QoS quality measurement
- the information collection server (TCE) 14 that has collected information on the result of quality measurement and the position of the radio terminal (UE) 10 from the radio base station (eNB) 11 determines which quality measurement result is the radio terminal ( UE) It is possible to grasp which area (that is, at which position) the result is obtained when 10 was staying, and it is possible to effectively use these pieces of information.
- wireless network information and “wireless terminal information” are added to the measured values of throughput, information on the position collected from the UE 10, etc., and reported to the TCE 14. It can be expected that the quality measurement will be more meaningful.
- a UE in the RRC_Connected state may perform Logged MDT.
- the UE 10 may acquire and hold information on positions at both the start time and the end time of the throughput measurement and collectively report to the eNB 11 later.
- the throughput up to the handover execution point may be measured.
- the handover point is the point in time when the UE 10 transmits a handover instruction (RRC Connection Reconfiguration or Handover command) that satisfies the condition of the measurement report (Measurement report) for handover, the UE 10 performs the handover instruction.
- RRC Connection Reconfiguration or Handover command a handover instruction that satisfies the condition of the measurement report (Measurement report) for handover
- the UE 10 performs the handover instruction. When received, etc. can be considered.
- the result of the throughput measurement may be set to an invalid value and transmitted to the TCE 14 instead of the throughput measurement result up to the handover execution time point.
- the throughput measurement result may be set as an invalid value and transmitted to the TCE.
- a possible method is to estimate the staying point of the wireless terminal and map the quality measurement result (that is, the throughput value) to the staying point.
- the quality measurement result that is, the throughput value
- FIG. 12 is a sequence diagram showing the operation of each node in the embodiment of the present invention, including other network nodes.
- the radio base station (eNB) 11 performs quality measurement related to service quality (for example, QoS).
- QoS quality measurement related to service quality
- Management based MDT also called Area based MDT
- MDT control method of MDT.
- the network operation management apparatus (EM) 13 sets configuration information (MDT measurement configuration) of radio terminal (UE) measurement of MDT and target position information of MDT with respect to the radio base station (eNB) 11 under control.
- MDT measurement configuration radio terminal
- eNB radio base station
- MDT Activation including setting information (QoS measurement configuration) of quality measurement related to quality of service (for example, QoS).
- Send a message (Step 601: MDT Activation (QoS measurement configur) tion)).
- This setting information of quality measurement collects information on the position from the UE 10 and how and when to measure what and how Indicates, etc.
- the eNB 11 confirms the user consent (User consent) related to the location information report of the UE 10 to the EPC (HSS) (Step 603: User consent information) retrieval).
- User consent user consent
- HSS EPC
- Step 603 User consent information
- eNB11 To EPC (MME / HSS) 12 as an interface (or message).
- MME / HSS eNB11 To EPC
- FIG. 12 it is assumed that the user has agreed (Consent) and selects the UE 10 of the user as the UE that executes the MDT measurement report.
- the eNB 11 starts a trace session (Step 604: Start Trace Session), prepares for the MDT, and then starts quality measurement related to quality of service (for example, QoS) (Step 605: Start QoS measurement).
- QoS quality measurement related to quality of service
- the eNB 11 collects information on the location of the target UE 10 during the quality measurement period (Step 606: Location information collection).
- the method of collecting information on the position of the UE 10 may be the method shown in the third to fifth embodiments, or may be a method realized by the present invention other than them.
- the quality measurement period does not necessarily have to be strictly required, and it may be possible to collect the quality measurement before, after, or the like.
- the eNB 11 stores the quality measurement result, the collected information on the position of the UE 10, and the like (Step 608: Store to Trace Record).
- the eNB 11 notifies the EPC (MME) 12 of trace basic information (for example, TR, TRSR) for which collection of measurement information has been completed (Step 609: Cell Traffic Trace with TR, TRSR).
- the EPC (MME) 12 reports information on the target UE 10 to the TCE 14 based on the notified trace basic information (Step 610: Sending TAC, TR, TRSR).
- the eNB 11 reports the measurement information collected by the MDT to the TCE (Step 611: Trace Record Reporting (QoS measurement results)).
- the radio base station (eNB) 11 performs the quality measurement related to the quality of service (for example, QoS)
- the information on the position of the radio terminal (UE) 10 to be the target of the quality measurement is made efficient Can be collected and the information about the location of the radio terminal (UE) 10 can be clearly associated with the result of the quality measurement.
- the information collection server (TCE) 14 that has collected information on the result of quality measurement and the position of the radio terminal (UE) 10 from the radio base station (eNB) 11 determines which quality measurement result is the radio terminal ( UE) It is possible to grasp which area (that is, at which position) the result is obtained when 10 was staying, and it is possible to effectively use these pieces of information.
- the radio base station (eNB) 11 measures or collects the above-mentioned "radio network information” or “radio terminal information” during the quality measurement period, and the information together with the quality measurement result It may be reported to the collection server (TCE) 14. This can be expected to make the quality measurement more meaningful.
- Management based MDT is used as an example of MDT method, but it goes without saying that Signaling based MDT can also be used.
- FIG. 13 is a diagram showing an example of a schematic configuration of a wireless communication system according to another embodiment of the present invention.
- This second wireless communication system assumes 3GPP UMTS, and a wireless terminal (UE) 20, a wireless base station (NB), a base station controller (RNC) (hereinafter NB / RNC 21), a serving GPRS support node (SGSN) (also referred to as SGSN server), mobile (communications) switching center (MSC) (also referred to as MSC server), home subscriber management server (HSS) (hereinafter referred to as SGSN / MSC / HSS 22), network operation management apparatus (EM) And 23) an information collection server (TCE) 24.
- UE wireless terminal
- NB base station controller
- RNC 21 base station controller
- SGSN serving GPRS support node
- MSC mobile (communications) switching center
- HSS home subscriber management server
- EM network operation management apparatus
- TCE information collection server
- the functional block diagrams of the radio terminal (UE) 20 and each radio network node in the second radio communication system of the present invention are similar in configuration to those in the first radio communication system and are therefore not shown.
- the configuration of the NB / RNC 21 is similar to the configuration of the eNB 11 of the first wireless communication system
- the configuration of the SGSN / MSC / HSS 22 is similar to the configuration of the MME / HSS 12 of the first wireless communication system. Since NB and RNC are basically separate nodes, there are differences in details such as the physical interface existing between NB and RNC, but there are significant functional differences in applying the present invention Absent.
- FIG. 14 is a sequence diagram showing the operation of each node of UMTS in the seventh embodiment of the present invention.
- the base station controller (RNC) 21 performs quality measurement related to quality of service (for example, QoS)
- QoS quality measurement related to quality of service
- UE radio terminal
- FIG. 14 is a sequence diagram showing the operation of each node of UMTS in the seventh embodiment of the present invention.
- the base station controller (RNC) 21 performs quality measurement related to quality of service (for example, QoS)
- QoS quality measurement related to quality of service
- UE radio terminal
- Management based MDT also called Area based MDT
- the network operation management apparatus (EM) 23 sets configuration information (MDT measurement configuration) of radio terminal (UE) measurement of MDT and target position information of MDT to a subordinate base station control station (RNC).
- MDT measurement configuration radio terminal
- RNC subordinate base station control station
- MDT Activation including setting information (QoS measurement configuration) of quality measurement related to quality of service (for example, QoS).
- Step 701 MDT Activation (QoS measurement configura) ion)).
- the setting information of the quality measurement indicates that the downlink throughput measurement is performed by the RNC 21 and that the UE 20 is made to acquire and collect information on the position at the start and end of the throughput measurement.
- the RNC 21 confirms the user consent (User consent) regarding location information report of the UE 20 to the CN (SGSN / MSC / HSS 22) (Step 703).
- User consent information retrieval In addition, although confirmation of User consent is performed via each interface from RNC 21 to SGSN or MSC, SGSN or MSC to HSS, in FIG.
- interface (or message of RNC 21 and SGSN or MSC, SGSN or MSC and HSS) ) are described as an interface (or message) from the RNC 21 to the CN 22 (HSS / SGSN / MSC). Further, in FIG. 14, it is assumed that the user has consented (Consent), and the UE 20 of the user is selected as the UE that executes the MDT measurement report.
- the RNC 21 starts a trace session (Step 704: Start Trace Session), and after preparing for the MDT, starts downlink throughput measurement (Step 705: Start QoS measurement).
- the CN 22 (SGSN) appropriately transmits downlink data to the RNC 21 (Step 706: DL data), and the RN 21 C transmits the downlink data to the UE 20.
- the RNC 21 starts transmitting the first data of the generated downlink data (that is, received from the CN 22) to the UE 20 (Step 707: DL data (first piece of data))
- MDT measurement is performed on the UE 20
- Step 708 Measurement configuration (Immediate MDT)).
- the UE 20 executes the MDT measurement report according to the instruction, and the RNC 21 stores MDT measurement information including information on the reported position (Step 709: MDT measurement, report (UE) and Store (RNC)). After that, the RNC 21 continues transmission of downlink data to the UE 20 (Step 710: DL data), and when transmission of the last data is completed (Step 711: DL data (last piece of data)), calculates the throughput value and quality The measurement process is finished (Step 712: Finish QoS measurement), the UE 20 is caused to execute MDT measurement, information on the position is acquired, and an instruction to report is sent (Step 713: Measurement configuration (Immediate MDT)).
- the UE 20 executes the MDT measurement report according to the instruction, and the RNC 21 stores the MDT measurement information including the information on the reported position (Step 714: MDT measurement, report (UE) and Store (RNC)). Then, the RNC 21 reports the measurement information collected by the MDT to the TCE 24 (Step 715: Trace Record Reporting (QoS measurement results)).
- the base station controller (RNC) 21 performs the quality measurement related to the quality of service (for example, QoS)
- the information on the position of the radio terminal (UE) 20 which is the target of the quality measurement is It can be efficiently collected and the results of the quality measurement can be clearly correlated with the information on the location of the wireless terminal (UE) 20.
- the information collection server (TCE) 24 that has collected information on the result of quality measurement and the position of the radio terminal (UE) 20 from the base station controller (RNC) 21 determines which quality measurement result is the radio terminal It is possible to grasp which area (that is, which position) the (UE) 20 is staying in, and the information can be used effectively.
- the base station controller (RNC) 21 measures or collects the above-mentioned "radio network information” or “radio terminal information” during the quality measurement period, and together with the quality measurement result, It may be reported to the information collection server (TCE) 24. This can be expected to make the quality measurement more meaningful.
- Management based MDT is used as an example of MDT method, but it goes without saying that Signaling based MDT can also be used.
- Signaling based MDT can also be used.
- a UE in the RRC_Connected state may perform Logged MDT.
- the subject matter of the present invention is not limited to them and may be GSM (Global System for Mobile communications), WiMAX (Worldwide)
- GSM Global System for Mobile communications
- WiMAX Worldwide Interoperability for Microwave Access and the like.
- each part can be configured by hardware, but can also be realized by a computer program.
- the processor operating with the program stored in the program memory realizes the same function and operation as the above-described embodiments.
- Quality measurement means for performing quality measurement related to service quality in communication between a wireless terminal and a wireless station, and information collection means for collecting information on the position of the wireless terminal to be subjected to the quality measurement
- a wireless communication system comprising: means for correlating, with a result of the quality measurement, information on the position of the wireless terminal at a time when a predetermined condition is satisfied in the execution period of the quality measurement.
- the start time of the quality measurement is At the start of the session targeted for the quality measurement, At the first data transmission of the session targeted for the quality measurement, At the first data reception of the session targeted for the quality measurement, When data belonging to a predetermined QoS (Qualit of Service) of the session targeted for the quality measurement is generated, At the time of transmission of data belonging to a predetermined QoS of a session to be subjected to the quality measurement, When data is generated in a predetermined LCG (Logical Channel Group) of the session to be subjected to the quality measurement, When transmitting data of a predetermined LCG of a session to be subjected to the quality measurement, The wireless communication system according to any one of supplementary notes 2 to 4, which is any one of the above.
- the end of the quality measurement is At the end of the session targeted for the quality measurement, At the end determination of the session targeted for the quality measurement, At the time of final data transmission of the session targeted for the quality measurement, When the final data of the session targeted for the quality measurement is received, When the final data transmission of the session targeted for the quality measurement is completed, When the final data reception of the session targeted for the quality measurement is completed, When there is no data belonging to a predetermined QoS of the session to be subjected to the quality measurement, When the data of the predetermined LCG of the session to be subjected to the quality measurement is lost,
- the wireless communication system according to any one of Supplementary Notes 2 to 5 that is any of.
- the predetermined condition is a predetermined cycle from the time when the predetermined condition is received, information on the position is acquired in the predetermined cycle, and the information is reported to the wireless station.
- Wireless communication system as described.
- the predetermined condition is a predetermined cycle from the time of receiving the predetermined condition, information on the position is acquired in the predetermined cycle, and the information on the acquired position is reported to the wireless station at a predetermined timing.
- the wireless communication system according to any one of supplementary notes 1 to 6.
- the predetermined timing is At the start of the quality measurement, At the end of the quality measurement, At the beginning of the session targeted for the quality measurement, At the start of data transmission and reception targeted for the quality measurement, At the end of the session targeted for the quality measurement, At the end of data transmission and reception targeted for the quality measurement, When instructed by the wireless station to report information on the location,
- the wireless station When the wireless terminal to be subjected to the quality measurement performs handover, the result of the quality measurement up to the handover start time or an invalid value is reported to the information collection server together with the information indicating the interruption due to the handover.
- the wireless communication system according to any one of appendices 1 to 13.
- the wireless station When a call disconnection occurs in the wireless terminal to be subjected to the quality measurement, the result of the quality measurement up to the time of the call disconnection (RLF), or an invalid value, together with information indicating an interruption due to the call disconnection,
- the wireless communication system according to any one of appendices 1 to 14, which reports to the information collection server.
- the wireless station The wireless communication system according to any one of appendices 1 to 15, wherein the information on the position collected from the wireless terminal and the result of the quality measurement are reported to an information collecting server as one QoS information element.
- the QoS information element is Terminal specific information, Core network load information, Radio access network load information, Travel speed related information of the wireless terminal; Radio bearer related information of the radio terminal, 24.
- the wireless communication system according to any of clauses 16 comprising at least one of wireless link information.
- the wireless station The wireless communication system according to any one of Appendices 1 to 17, which receives an instruction from an upper network node, performs quality measurement related to service quality, and collects information on the position of the wireless terminal to be the target of the quality measurement. .
- the wireless terminal The wireless communication system according to any one of appendices 1 to 17, which receives an instruction from the wireless station and performs quality measurement related to service quality.
- the wireless station The wireless communication system according to any one of appendices 1 to 19, which determines whether the predetermined condition is satisfied and instructs the wireless terminal to be subjected to the quality measurement to acquire one or more pieces of information related to the position. .
- the wireless terminal is The wireless communication system according to any one of appendices 1 to 19, wherein it is determined whether the predetermined condition is satisfied and information on the position is acquired.
- a wireless terminal in a wireless communication system that performs quality measurement related to service quality in communication between the wireless terminal and the wireless station,
- a wireless terminal comprising position information reporting means for acquiring information on its own position at a time when a predetermined condition is satisfied in an execution period of the quality measurement, and reporting information on the acquired position to the radio station.
- the positional information reporting unit receives an instruction to acquire information on one or more positions from the wireless station, and acquires information on one or more positions according to any of Supplementary notes 22 to 24. Wireless terminal.
- the start time of the quality measurement is At the start of the session targeted for the quality measurement, At the first data transmission of the session targeted for the quality measurement, At the first data reception of the session targeted for the quality measurement, When data belonging to a predetermined QoS (Quality of Service) of the session to be subjected to the quality measurement is generated, At the time of transmission of data belonging to a predetermined QoS of a session to be subjected to the quality measurement, When data is generated in a predetermined LCG (Logical Channel Group) of the session to be subjected to the quality measurement, When transmitting data of a predetermined LCG of a session to be subjected to the quality measurement, 24.
- the wireless terminal according to any one of appendices 23 to 25 which is any one of the above.
- the end of the quality measurement is At the end of the session targeted for the quality measurement, At the end determination of the session targeted for the quality measurement, At the time of final data transmission of the session targeted for the quality measurement, When the final data of the session targeted for the quality measurement is received, When the final data transmission of the session targeted for the quality measurement is completed, When the final data reception of the session targeted for the quality measurement is completed, When there is no data belonging to a predetermined QoS of the session to be subjected to the quality measurement, When the data of the predetermined LCG of the session to be subjected to the quality measurement is lost, 24.
- the wireless terminal according to any one of appendices 23 to 26, which is any one of the above.
- the predetermined condition is a predetermined cycle from the time of receiving the predetermined condition,
- the wireless terminal according to any one of appendices 22 to 27, wherein the position information reporting means acquires information on the location in the predetermined cycle and reports the information to the wireless station.
- the predetermined condition is a predetermined cycle from the time of receiving the predetermined condition, 24.
- the wireless terminal according to any one of Supplementary note 22 to Supplementary note 27, wherein the position information reporting means acquires information on the position in the predetermined cycle, and reports the acquired information on the position to the wireless station at a predetermined timing.
- the position information reporting means When the distance the wireless terminal has moved since the previous report of the information on the position is a predetermined value or more, or when the wireless terminal transmits and receives a predetermined number or more of packets, Clause 28.
- the predetermined timing is At the start of the quality measurement, At the end of the quality measurement, At the beginning of the session targeted for the quality measurement, At the start of data transmission and reception targeted for the quality measurement, At the end of the session targeted for the quality measurement, At the end of data transmission and reception targeted for the quality measurement, When instructed by the wireless station to report information on the location, 24.
- the wireless terminal according to appendix 29 or appendix 30, which is at least one of the above.
- Supplementary Note 33 The wireless terminal according to any one of Supplementary note 22 to Supplementary note 32, which receives an instruction to acquire detailed position information from the wireless station.
- Supplementary note 34 In any one of Supplementary note 22 to Supplementary note 33, wherein the predetermined condition is either that the condition regarding measurement report of reception quality specified in advance is satisfied, or that the instruction for handover is transmitted or received. Wireless terminal.
- the position information reporting means 24 The wireless terminal according to any one of Supplementary note 22 to P34, wherein information related to the position is acquired based on an instruction from the wireless station, which is transmitted when the wireless station determines that the predetermined condition is satisfied.
- the position information reporting means 24 The wireless terminal according to any one of appendixes 22 to 34, which judges whether or not the predetermined condition is satisfied, and acquires information on the position.
- Supplementary note 37 The wireless terminal according to any one of Supplementary note 22 to Supplementary note 36, further comprising means for receiving a command from the wireless station and performing quality measurement related to service quality.
- a wireless station in a wireless communication system that performs quality measurement related to quality of service in communication between a wireless terminal and a wireless station, Means for instructing the wireless terminal to be subjected to the quality measurement to acquire one or more pieces of information related to the position at the time when the predetermined condition is satisfied;
- a wireless station comprising: information on the position of the wireless terminal; and means for associating the result of the quality measurement.
- a network operation management apparatus in a wireless communication system that performs quality measurement related to service quality in communication between a wireless terminal and a wireless station, An instruction to perform the quality measurement; In the execution period of the quality measurement, an instruction to cause the wireless terminal to be subjected to the quality measurement to acquire one or more pieces of information related to the position at the time when the predetermined condition is satisfied;
- a network operation management apparatus comprising: means for instructing the wireless station to transmit information on the position of the wireless terminal and the result of the quality measurement in association with each other.
- (Supplementary note 40) Perform quality measurement related to service quality in communication between a wireless terminal and a wireless station, Acquiring information on a position of the wireless terminal at a time when a predetermined condition is satisfied in the execution period of the quality measurement;
- the communication quality confirmation method which associates the information regarding the position of the wireless terminal at the time of satisfying the predetermined condition, and the result of the quality measurement.
- Radio station 2 radio terminal 10 radio terminal (UE) 11 Radio Base Station (eNB) 12 Mobility Management Device (MME) / Home Subscriber Management Server (HSS) 13 Network Operation Management Device (EM) 14 Information Collection Server (Trace Collection Entity: TCE) 20 wireless terminals (UE) 21 base station controller (RNC) 22 Home Subscriber Management Server (HSS) 23 Network Operation Management Device (EM) 24 Information Collection Server (TCE) 24
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Description
本発明の実施形態について、無線局(例えば、無線基地局や基地局制御局)と無線端末を構成要素として含む、無線通信システムを例に用い、図面を参照して詳細に説明する。
・GPS(Global Positioning System)に代表されるGNSS(Global Navigation Satellite System)で取得した詳細な位置情報、
・OTDOA(Observed Time Difference Of Arrival)などで知られる1つの無線端末における複数の無線局からの信号の到着タイミングの差を基に取得した詳細な位置情報、
・無線端末の滞在エリア(例えば、セル)と隣接エリア(例えば、セル)の下り信号(例えば、パイロット信号や参照信号)の受信電力(又は、受信品質)と当該エリアの識別子、
などが考えられるが、これらに限定はされない。尚、無線端末が詳細な位置情報の精度(つまり、測位精度)も当該詳細な位置情報と一緒に報告することも考えられる。一方、サービス品質に関連する品質測定は、無線局が行う場合と、無線端末が行う場合の両方が考えられる。
・品質測定の開始から終了まで、
・品質測定の開始前の準備期間から終了まで、
・品質測定の開始から終了後の後処理期間まで、
・品質測定の開始前の準備期間から終了後の後処理期間まで、
などが考えられるが、これらに限定はされない。尚、品質測定の終了後の後処理期間とは、例えば、当該品質測定が終了したことを所定条件とした場合などに、品質測定の終了後に無線端末が位置に関する情報を取得するまでに要する期間を示す。ここで、サービス品質(例えば、QoS)に関連する品質測定の例としては、例えば、
・スループット測定、
・パケットロス率、
・パケット廃棄率、
・パケット(又は、トランスポートブロック)誤り率、
・パケット(又は、トランスポートブロック)再送率、
・呼接続遅延、
・ハンドオーバ遅延、
などが考えられるが、これらに限定はされない。ここで、呼接続遅延とは、ある無線端末が、無線局と無線リンク接続確立、或は、ネットワーク接続確立を行う際に、初期アクセス確認後(又は初期アクセスプロセス完了後)から各接続確立が完了するまでの時間、などが考えられる。また、ハンドオーバ遅延とは、ハンドオーバの為の無線端末による測定報告が行われた時点から、ハンドオーバが完了するまでの時間、などが考えられる。尚、ハンドオーバ完了は、無線端末がハンドオーバ完了するまで、或は、ソース無線局がターゲット無線局から無線端末のハンドオーバが完了したことを示す情報を通知されるまで、などが考えられる。
・無線局が所定条件を満たしたと判定した時に無線端末に指示を出し、無線局から当該指示を受けた時点で無線端末が保有している位置に関する情報、
・無線局が所定条件を満たしたと判定した時に無線端末に指示を出し、無線局から当該指示を受けた時点で無線端末が取得する(或は取得中であった)位置に関する情報、
・無線端末が所定条件を満たしたと判定した時に、保有している位置に関する情報、
・無線端末が所定条件を満たしたと判定した時に、取得した(或は取得中であった)位置に関する情報、
などが考えられるが、これらに限定はされない。
・サービス品質(例えば、QoS)に関連する品質測定の開始、又は、終了(の少なくとも一方)、
・サービス品質(例えば、QoS)に関連する品質測定の開始、及び、終了、
・所定の周期、
・GPSやOTDOAなどによる詳細な位置情報を取得(又は更新)したこと、
・ハンドオーバのトリガがかかったこと、
・呼切断(Radio Link Failure:RLFとも呼ぶ)が発生したこと、
・サービングセル(つまり、滞在中のセル)の受信品質が所定量変化したこと、
などが考えられるが、これらに限定はされない。
・品質測定の対象とするセッションの開始時、
・品質測定の対象とするセッションの初回データ送信時、
・品質測定の対象とするセッションの初回データ受信時、
・品質測定の対象とするセッションの所定のQoS(又は、QoSグループ、QCI:QoS Class Indicator)に属するデータが発生した時点、
・前記品質測定の対象とするセッションの所定のQoS(又は、QoSグループ、QCI)に属するデータの送信時、
などが考えられるが、これらに限定はされない。
・品質測定の対象とするセッションの終了時、
・品質測定の対象とするセッションの終了判定時、
・品質測定の対象とするセッションの最終データ送信時、
・品質測定の対象とするセッションの最終データ受信時、
・品質測定の対象とするセッションの最終データ送信完了時、
・品質測定の対象とするセッションの最終データ受信完了時、
・品質測定の対象とするセッションの所定のQoS(又は、QoSグループ、QCI)に属するデータが無くなった時点、
などが考えられるが、これらに限定はされない。
図1において、以下のステップを実行することにより、無線局1は、サービス品質(例えば、QoS)に関連する品質測定を行う際に、当該無線端末2から位置に関する情報を収集する。まず、無線局1は、無線端末2に対してサービス品質(例えば、QoS)に関連する品質測定を開始する(Step101)。無線局1は、所定条件を満たすか否かを判定し、ある時点で所定条件を満たすと判定した場合(Step102)、無線端末2に、位置に関する情報の報告の指示を行う(Step103)。無線端末2は、当該指示を受信すると、位置に関する情報の取得を行い(Step104)、所定のタイミングで取得した位置に関する情報を無線局1に報告する(Step105)。ここで、所定のタイミングは、位置に関する情報の報告指示の際に無線局1から通知しても良いし、予め無線端末2に通知されていても良い。そして、無線局1は、サービス品質に関連する品質測定を終了する(Step106)。無線局1は、サービス品質に関連する品質測定の実行期間において所定条件を満たした時点の無線端末の位置に関する情報と、品質測定の結果との関連付けを行う(Step107)。
次に、図2を用いて、無線端末が当該品質測定を行う例を示す。
・無線端末が、周期的に位置に関する情報を取得し、所定報告トリガがかかると報告する、
・無線端末が、周期的に位置に関する情報を取得し、前回取得時、或は、前回報告時から所定距離以上移動していた場合に報告する、
・無線端末が、周期的に位置に関する情報を取得し、前回取得時、或は、前回報告時から所定数(又は所定量)のパケット(又はデータ)を送信した場合に報告する、
・無線端末が、所定取得トリガがかかると位置に関する情報を取得し、周期的に報告する、
・無線端末が、所定取得トリガがかかると位置に関する情報を取得し、所定報告トリガがかかると報告する。
以下では、本発明の実施形態について、3GPP(3rd Generation Partnership Project)の無線通信システムであるLTE(Long Term Evolution)やUMTS(Universal Mobile Telecommunications System)を例に用い、図面を参照して詳細に説明する。
・GPSに代表されるGNSS(Global Navigation Satellite System)で取得した詳細な位置情報、
・OTDOAなどの位置情報サービス(Location Service: LCS)で取得した詳細な位置情報、
・無線端末のサービングセルと隣接セルの下り信号(例えば、パイロット信号や参照信号)の受信電力(例えば、RSRP、又は、受信品質。)と当該セルのID(例えば、PCIやPSC)、
などが考えられる。下り信号の受信電力(又は、受信品質)とセルIDによる位置に関する情報は、RF Fingerprintとも呼ばれる。尚、無線端末が詳細な位置情報の精度(つまり、測位精度)も当該詳細な位置情報と一緒に報告することも考えられる。
・コアネットワーク負荷情報、
・無線アクセスネットワーク負荷情報、
・無線ベアラ関連情報、
などが考えられるが、これらに限定はされない。コアネットワーク負荷情報は、EPC(例えば、MME、S-GW)やCore Network(CN)(例えば、SGSN、GGSN)の負荷がどのようなレベルか、又は、過負荷状態(Overload)になっているか否か、などの情報である。無線アクセスネットワーク負荷情報は、RAN(例えば、eNB、NB、RNC)の負荷(例えば、無線リソース使用率(Physical Resource Block Usage)、ハードウェア負荷(Hardware Load))、ネットワーク負荷(Transport Network Layer Load)、利用可能な容量(Composite Available Capacity))がどのようなレベルか、過負荷状態(Overload)になっているか否か、アクセス制限(Access Barring:ABや、Access Class Barring:ACB)がされているか否か、セル辺りのアクティブ状態の無線端末数(Number of Active UE)、セル辺りの所定期間に受信したランダムアクセスのプリアンブル数(Number of Received Random Access Preambles)、などの情報である。無線ベアラ関連情報は、セル当りにいくつの無線ベアラ(Radio Bearer:RB)が使用されているか、又は、セル当りにいくつの無線アクセスベアラ(Radio Access Bearer:RAB)が張られているか、などの情報である。尚、無線ベアラ(RB)や無線アクセスベアラ(RAB)は、GBR(Guaranteed Bit Rate)、Non-GBR、などの種類別の情報でも良い。
・端末固有情報、
・移動速度関連情報
・無線リンク情報、
などが考えられるが、これらに限定はされない。端末固有情報は、無線端末能力(UE Capability)や無線端末カテゴリ(UE Category)、アクセスクラス(Access Class)、端末タイプ(例えば、端末識別子であるInternational Mobile Equipment Identifier:IMEIに含まれるType Allocation Code:TAC)、などの情報である。移動速度関連情報は、無線端末(UE)が自身で測定した移動速度、無線基地局(eNB)が推定したUEの移動速度、UEが判定した自身の移動性状態(Mobility state)、eNBが判定したUEのMobility state、などの情報である。尚、Mobility stateは、Normal、Low、Medium、Highなどの複数レベルで規定される情報で、例えば、所定時間内に無線端末(UE)が何回ハンドオーバを行ったか、又は、何回セル再選択を行ったかに基づいて判定される。無線リンク情報は、同時に使用している無線ベアラ数(Number of RB)、同時に使用しているセル数(Number of Serving Cell)、同時に使用しているコンポーネントキャリア数(Number of Component Carrier)、或は、複数の無線ベアラを使用しているか否か、複数のセルやコンポーネントキャリアを使用しているか否か、或は、通信路品質(Channel Quality Indicator:CQI)、或は、無線局(例えば、eNB、NB、RNC)のスケジューラにおけるポリシー(例えば、Proportional Fairness:PF、Round Robin:RR)、などの情報である。尚、複数のセルや複数のコンポーネントキャリアを使用する技術は、LTEでは、キャリアアグリゲーション(Carrier Aggregation)と呼ばれ、スループット改善(つまり増加)の効果が期待される技術である。同様に、UMTSでは、複数のセルを使用する技術は、HSDPA(High Speed Downlink Packet Access)やHSUPA(High Speed Uplink Packet Access)の使用と組み合わせて用いられ、例えば2つのセルを同時に使用する場合、デュアルセル(Dual cell)HSDPA、デュアルセルHSUPA、などと呼ばれる。
図5は、本発明の一実施形態の第1の無線通信システムの概略構成の例を示す図である。この第1の無線通信システムは、3GPP LTEを想定しており、無線端末(UE)10、無線基地局(eNB)11、無線端末の移動管理装置(MME)/ホーム加入者管理サーバ(HSS)12、ネットワーク運用管理装置(EM)13、情報集数サーバ(Trace Collection Entity: TCE)14、から構成される。
図9は、本発明の第3の実施例における無線基地局(eNB)11と無線端末(UE)10の動作を示すシーケンス図である。本実施例では、サービス品質(例えば、QoS)に関連する品質測定として、下りデータのユーザ毎のスループット(以下、特に断りが無い場合、ユーザ毎のスループットを単にスループットと示す)の測定を行うことを想定する。尚、スループットの定義は様々考えられるが、本発明の適用範囲は、定義には左右されず、すべてに適用可能である。また、eNB11は、スループットの測定開始時、及び、終了時に、UE10に位置に関する情報を取得させ、取得した当該位置に関する情報を報告させる。さらに、図9では、eNB11が上位ネットワーク(例えば、EM13やEPC14)からMDTでスループット測定を行う指示を受けているものとする。
第3の実施例では、サービス品質(例えば、QoS)に関連する品質測定としてスループット測定を想定し、スループット測定開始時と測定終了時に、無線端末(UE)10が位置に関する情報を取得し、報告していたが、第3の実施例の変形例1では、さらに、GPSやLCSで詳細な位置情報を取得した場合に、これらを報告する。その他の動作は、基本的に第3の実施例と同様であり、以下では適宜説明を省略する。
第3の実施例では、サービス品質(例えば、QoS)に関連する品質測定としてスループット測定を想定し、スループット測定開始時と測定終了時の無線端末(UE)10の位置に関する情報を収集し、第3の実施例の変形例1では、さらに、GPSやLCSで詳細な位置情報を取得した場合に、それらも収集していた。第3の実施例の変形例2では、無線基地局(eNB)11がスループット測定期間中に無線端末(UE)10がGPSやLCSで詳細な位置情報を取得した場合に、それらを報告させ、スループット測定期間中にUEが詳細な位置情報を取得しなかった場合、スループット測定終了時に、UEに位置に関する情報を取得及び報告させる。その他の動作は、基本的に第3の実施例と同様であり、以下では適宜説明を省略する。
図10は、本発明の第4の実施例における無線基地局(eNB)11と無線端末(UE)10の動作を示すシーケンス図である。本実施例では、サービス品質(例えば、QoS)に関連する品質測定として、下りデータのパケットロス率の測定と、下りデータのパケット廃棄率の測定を行うことを想定する。尚、パケットロス率の定義やパケット廃棄率の定義は様々考えられるが、本発明の適用範囲は、定義には左右されず、すべてに適用可能である。また、eNB11は、品質測定期間中、つまりパケットロス率とパケット廃棄率の測定期間中、UE10に周期的に位置に関する情報の取得、及び、報告を行わせる。そして、eNB11は、パケットロス率とパケット廃棄率の測定結果と、それらの測定期間中にUEから報告された位置に関する情報を、MDTの情報収集サーバ(TCE)14へ報告する。尚、品質測定期間中とは、品質測定の開始から終了までに限らず、品質測定の開始直前、終了直後を含むようにしても良い。さらに、図10では、eNB11が上位ネットワーク(例えば、EMやEPC)からMDTでパケットロス率の測定とパケット廃棄率の測定を行う指示を受けているものとする。
第4の実施例では、サービス品質(例えば、QoS)に関連する品質測定としてパケットロス率とパケット廃棄率の測定を想定し、測定期間中に、無線端末(UE)10に周期的に位置に関する情報を取得及び報告させ、無線基地局(eNB)11が、それらを情報収集サーバ(TCE)14へ送信していたが、第4の実施例の変形例1では、eNB11がTCE14へ報告するUE10の位置に関する情報を、周期的に収集したものの中から必要なものを選択する。
第4の実施例の変形例1では、サービス品質(例えば、QoS)に関連する品質測定としてパケットロス率とパケット廃棄率の測定を想定し、測定期間中に、無線端末(UE)10から周期的に収集した位置に関する情報から、無線基地局(eNB)11が選択を行い、それらを情報収集サーバ(TCE)14へ送信していたが、第4の実施例の変形例2では、当該選択をUE10が行う。例えば、eNB11がUE10に、選択の基準となる情報を通知し、当該選択の基準に合致する場合のみ、位置に関する情報を報告する方法が考えられる。
図11は、本発明の第5の実施例における無線基地局(eNB)11と無線端末(UE)10の動作を示すシーケンス図である。本実施例では、サービス品質(例えば、QoS)に関連する品質測定として、上りデータのスループットの測定を行うことを想定する。尚、スループットの定義は様々考えられるが、本発明の適用範囲は、定義には左右されず、すべてに適用可能である。また、eNB11は、UE10によるスループットの測定開始時、及び、終了時に、UE10に位置に関する情報を取得させ、取得した当該位置に関する情報を報告させる。ここで、測定開始時は、当該品質測定の対象とするセッション開始時(Bearer setup時)、又は、当該セッションの初回データ送受信時(つまり、eNB11による送信或は受信、又は、UE10による送信或は受信)、又は、所定のQoS(或は、QoSグループ、QCI)に属するデータが発生した時点、又は、所定のQoS(或は、QoSグループ、QCI)に属するデータの送信時、又は、所定の論理チャネルグループ(Logical Channel Group:LCG)にデータが発生した(つまり、データがavailableになった)時点、又は、所定のLCGのデータの送信時、などが考えられる。また、測定終了時は、当該品質測定の対象とするセッションの終了時又は終了判定時、又は、当該セッションの最終データ送信時(或は、受信時)、又は、最終データ送信完了時(或は、受信完了時)、又は、所定のQoS(或は、QoSグループ、QCI)に属するデータが無くなった時点、又は、所定のLCGのデータが無くなった(つまり、emptyになった)時点、などが考えられる。さらに、図11では、eNB11が上位ネットワーク(例えば、EM13やEPC14)からMDTでスループット測定を行う(第5の実施例では、UE10に測定させる)指示を受けているものとする。
第3から第5の実施例では、LTEのシステムを想定した場合の、無線基地局(eNB)11と無線端末(UE)10の動作に注目し、本発明の実施例を説明した。図12では、その他のネットワークノードも含めた、本発明の実施例における各ノードの動作を示すシーケンス図である。尚、第6の実施例では、無線基地局(eNB)11がサービス品質(例えば、QoS)に関連する品質測定を行う場合を想定する。また、MDTの制御方式としては、Management based MDT(Area based MDTとも呼ぶ)を想定する。
図13は、本発明の別の一実施形態の無線通信システムの概略構成の例を示す図である。この第2の無線通信システムは、3GPP UMTSを想定しており、無線端末(UE)20、無線基地局(NB)、基地局制御局(RNC)(以下、NB/RNC21)、サービングGPRSサポートノード(SGSN)(SGSNサーバとも呼ぶ)、移動(通信)交換局(MSC)(MSCサーバとも呼ぶ)、ホーム加入者管理サーバ(HSS)(以下、SGSN/MSC/HSS22)、ネットワーク運用管理装置(EM)23、情報収集サーバ(TCE)24、から構成される。
図14に、本発明の第7の実施例におけるUMTSの各ノードの動作を示すシーケンス図である。第7の実施例では、基地局制御局(RNC)21がサービス品質(例えば、QoS)に関連する品質測定を行う場合を想定し、品質測定の例として、下りスループットの測定を行うものとする。また、無線端末(UE)20の位置に関する情報の収集は、品質測定の開始時と終了時に行うものとする。尚、MDTの制御方式としては、Management based MDT(Area based MDTとも呼ぶ)を想定する。
前記品質測定の実行期間において、所定条件を満たした時点における前記無線端末の前記位置に関する情報と、前記品質測定の結果とを関連付ける手段を
有する無線通信システム。
付記1に記載の無線通信システム。
付記1又は付記2のいずれかに記載の無線通信システム。
を有する付記1から付記3のいずれかに記載の無線通信システム。
前記品質測定の対象とするセッションの開始時、
前記品質測定の対象とするセッションの初回データ送信時、
前記品質測定の対象とするセッションの初回データ受信時、
前記品質測定の対象とするセッションの所定のQoS(Qualit of Service)に属するデータが発生した時点、
前記品質測定の対象とするセッションの所定のQoSに属するデータの送信時、
前記品質測定の対象とするセッションの所定のLCG(Logical Channel Group)にデータが発生した時点、
前記品質測定の対象とするセッションの所定のLCGのデータの送信時、
のいずれかである
付記2から付記4のいずれかに記載の無線通信システム。
前記品質測定の対象とするセッションの終了時、
前記品質測定の対象とするセッションの終了判定時、
前記品質測定の対象とするセッションの最終データ送信時、
前記品質測定の対象とするセッションの最終データ受信時、
前記品質測定の対象とするセッションの最終データ送信完了時、
前記品質測定の対象とするセッションの最終データ受信完了時、
前記品質測定の対象とするセッションの所定のQoSに属するデータが無くなった時点、
前記品質測定の対象とするセッションの所定のLCGのデータが無くなった時点、
のいずれかである
付記2から付記5のいずれかに記載の無線通信システム。
付記1から付記6のいずれかに記載の無線通信システム。
付記1から付記6のいずれかに記載の無線通信システム。
当該無線端末が前回の前記位置に関する情報の報告時から移動した距離が所定値以上である場合、又は、当該無線端末が所定数以上のパケットを送受信した場合に、
前記位置に関する情報を報告する
付記8に記載の無線通信システム。
前記品質測定の開始時、
前記品質測定の終了時、
前記品質測定の対象とするセッション開始時、
前記品質測定の対象とするデータ送受信開始時、
前記品質測定の対象とするセッション終了時、
前記品質測定の対象とするデータ送受信終了時、
前記無線局からの前記位置に関する情報の報告の指示を受けた時点、
の少なくともいずれかである
付記8又は付記9に記載の無線通信システム。
付記1から付記10のいずれかに記載の無線通信システム。
付記1から付記11のいずれかに記載の無線通信システム。
付記1から付記12のいずれかに記載の無線通信システム。
前記品質測定の対象とする前記無線端末がハンドオーバを行う場合、当該ハンドオーバ開始時点までの前記品質測定の結果、又は無効値を、ハンドオーバによる中断を示す情報と一緒に、情報収集サーバに報告する
付記1から付記13のいずれかに記載の無線通信システム。
前記品質測定の対象とする前記無線端末に呼切断が生じた場合、当該呼切断(RLF)発生時点までの前記品質測定の結果、又は無効値を、呼切断による中断を示す情報と一緒に、情報収集サーバに報告する
付記1から付記14のいずれかに記載の無線通信システム。
前記無線端末から収集した前記位置に関する情報と、前記品質測定の結果とを、1つのQoS情報要素として情報収集サーバに報告する
付記1から付記15のいずれかに記載の無線通信システム。
端末固有情報、
コアネットワーク負荷情報、
無線アクセスネットワーク負荷情報、
前記無線端末の移動速度関連情報、
前記無線端末の無線ベアラ関連情報、
無線リンク情報
の少なくとも一つを含む
付記16のいずれかに記載の無線通信システム。
上位のネットワークノードから指示を受け、サービス品質に関連する品質測定を行い、前記品質測定の対象となる前記無線端末の位置に関する情報を収集する
付記1から付記17のいずれかに記載の無線通信システム。
前記無線局から指示を受け、サービス品質に関連する品質測定を行う
付記1から付記17のいずれかに記載の無線通信システム。
前記所定条件を満たすか否かを判定し、前記品質測定の対象とする前記無線端末に前記位置に関する情報を1つ以上取得する指示を行う
付記1から付記19のいずれかに記載の無線通信システム。
前記所定条件を満たすか否かを判定し、前記位置に関する情報を取得する
付記1から付記19のいずれかに記載の無線通信システム。
前記品質測定の実行期間において、所定条件を満たした時点における自身の位置に関する情報を取得し、前記取得した位置に関する情報を前記無線局に報告する位置情報報告手段
を有する無線端末。
付記22に記載の無線端末。
付記22又は付記23のいずれかに記載の無線端末。
付記22から付記24のいずれかに記載の無線端末。
前記品質測定の対象とするセッションの開始時、
前記品質測定の対象とするセッションの初回データ送信時、
前記品質測定の対象とするセッションの初回データ受信時、
前記品質測定の対象とするセッションの所定のQoS(Quality of Service)に属するデータが発生した時点、
前記品質測定の対象とするセッションの所定のQoSに属するデータの送信時、
前記品質測定の対象とするセッションの所定のLCG(Logical Channel Group)にデータが発生した時点、
前記品質測定の対象とするセッションの所定のLCGのデータの送信時、
のいずれかである
付記23から付記25のいずれかに記載の無線端末。
前記品質測定の対象とするセッションの終了時、
前記品質測定の対象とするセッションの終了判定時、
前記品質測定の対象とするセッションの最終データ送信時、
前記品質測定の対象とするセッションの最終データ受信時、
前記品質測定の対象とするセッションの最終データ送信完了時、
前記品質測定の対象とするセッションの最終データ受信完了時、
前記品質測定の対象とするセッションの所定のQoSに属するデータが無くなった時点、
前記品質測定の対象とするセッションの所定のLCGのデータが無くなった時点、
のいずれかである
付記23から付記26のいずれかに記載の無線端末。
前記位置情報報告手段は、当該所定周期で前記位置に関する情報を取得し、前記無線局に報告する
付記22から付記27のいずれかに記載の無線端末。
前記位置情報報告手段は、当該所定周期で前記位置に関する情報を取得し、取得した前記位置に関する情報を所定タイミングで前記無線局に報告する
付記22から付記27のいずれかに記載の無線端末。
当該無線端末が前回の前記位置に関する情報の報告時から移動した距離が所定値以上である場合、又は、当該無線端末が所定数以上のパケットを送受信した場合に、
前記位置に関する情報を報告する
付記29に記載の無線端末。
前記品質測定の開始時、
前記品質測定の終了時、
前記品質測定の対象とするセッション開始時、
前記品質測定の対象とするデータ送受信開始時、
前記品質測定の対象とするセッション終了時、
前記品質測定の対象とするデータ送受信終了時、
前記無線局からの前記位置に関する情報の報告の指示を受けた時点、
の少なくともいずれかである
付記29又は付記30に記載の無線端末。
付記22から付記31のいずれかに記載の無線端末。
付記22から付記32のいずれかに記載の無線端末。
付記22から付記33のいずれかに記載の無線端末。
前記無線局が前記所定条件を満たすと判定した場合に送信される、前記無線局からの指示に基づいて、前記位置に関する情報を取得する
付記22から付記34のいずれかに記載の無線端末。
前記所定条件を満たすか否かを判定し、前記位置に関する情報を取得する
付記22から付記34のいずれかに記載の無線端末。
を有する付記22から付記36のいずれかに記載の無線端末。
前記品質測定の対象とする前記無線端末に、所定条件を満たした時点における位置に関する情報を1つ以上取得させる指示を行う手段と、
前記無線端末の位置に関する情報と、前記品質測定の結果との関連付けを行う手段とを
有する無線局。
前記品質測定を行う指示と、
前記品質測定の実行期間において、前記品質測定の対象とする前記無線端末に、所定条件を満たした時点における位置に関する情報を1つ以上取得させる指示と、
前記無線端末の位置に関する情報と前記品質測定の結果とを関連付けて送信させる指示と
を前記無線局に行う手段
を有するネットワーク運用管理装置。
前記品質測定の実行期間において、所定条件を満たした時点における前記無線端末の位置に関する情報を取得し、
前記所定条件を満たした時点における前記無線端末の前記位置に関する情報と、前記品質測定の結果とを関連付ける
通信品質確認方法。
2 無線端末
10 無線端末(UE)
11 無線基地局(eNB)
12 移動管理装置(MME)/ホーム加入者管理サーバ(HSS)
13 ネットワーク運用管理装置(EM)
14 情報集数サーバ(Trace Collection Entity: TCE)
20 無線端末(UE)
21 基地局制御局(RNC)
22 ホーム加入者管理サーバ(HSS)
23 ネットワーク運用管理装置(EM)
24 情報収集サーバ(TCE)24
Claims (40)
- 無線端末と無線局との間の通信におけるサービス品質に関連する品質測定を行う品質測定手段と、前記品質測定の対象となる前記無線端末の位置に関する情報を収集する情報収集手段とを有する無線通信システムにおいて、
前記品質測定の実行期間において、所定条件を満たした時点における前記無線端末の前記位置に関する情報と、前記品質測定の結果とを関連付ける手段を
有する無線通信システム。 - 前記所定条件が、前記品質測定の開始時、終了時の少なくとも一方である
請求項1に記載の無線通信システム。 - 前記所定条件が、前記品質測定の開始時、及び、終了時である
請求項1又は請求項2のいずれかに記載の無線通信システム。 - 前記無線局が、前記品質測定の対象とする前記無線端末に、前記位置に関する情報を1つ以上取得させる指示を行う手段
を有する請求項1から請求項3のいずれかに記載の無線通信システム。 - 前記品質測定の開始時が、
前記品質測定の対象とするセッションの開始時、
前記品質測定の対象とするセッションの初回データ送信時、
前記品質測定の対象とするセッションの初回データ受信時、
前記品質測定の対象とするセッションの所定のQoS(Qualit of Service)に属するデータが発生した時点、
前記品質測定の対象とするセッションの所定のQoSに属するデータの送信時、
前記品質測定の対象とするセッションの所定のLCG(Logical Channel Group)にデータが発生した時点、
前記品質測定の対象とするセッションの所定のLCGのデータの送信時、
のいずれかである
請求項2から請求項4のいずれかに記載の無線通信システム。 - 前記品質測定の終了時が、
前記品質測定の対象とするセッションの終了時、
前記品質測定の対象とするセッションの終了判定時、
前記品質測定の対象とするセッションの最終データ送信時、
前記品質測定の対象とするセッションの最終データ受信時、
前記品質測定の対象とするセッションの最終データ送信完了時、
前記品質測定の対象とするセッションの最終データ受信完了時、
前記品質測定の対象とするセッションの所定のQoSに属するデータが無くなった時点、
前記品質測定の対象とするセッションの所定のLCGのデータが無くなった時点、
のいずれかである
請求項2から請求項5のいずれかに記載の無線通信システム。 - 前記所定条件が、当該所定条件を受信した時点からの所定周期であり、当該所定周期で前記位置に関する情報を取得し、前記無線局に報告する
請求項1から請求項6のいずれかに記載の無線通信システム。 - 前記所定条件が、当該所定条件を受信した時点からの所定周期であり、当該所定周期で前記位置に関する情報を取得し、取得した前記位置に関する情報を所定タイミングで前記無線局に報告する
請求項1から請求項6のいずれかに記載の無線通信システム。 - 前記無線端末が、
当該無線端末が前回の前記位置に関する情報の報告時から移動した距離が所定値以上である場合、又は、当該無線端末が所定数以上のパケットを送受信した場合に、
前記位置に関する情報を報告する
請求項8に記載の無線通信システム。 - 前記所定タイミングが、
前記品質測定の開始時、
前記品質測定の終了時、
前記品質測定の対象とするセッション開始時、
前記品質測定の対象とするデータ送受信開始時、
前記品質測定の対象とするセッション終了時、
前記品質測定の対象とするデータ送受信終了時、
前記無線局からの前記位置に関する情報の報告の指示を受けた時点、
の少なくともいずれかである
請求項8又は請求項9に記載の無線通信システム。 - 前記所定条件が,前記無線端末が詳細な位置情報を取得、又は、更新したことである
請求項1から請求項10のいずれかに記載の無線通信システム。 - 前記無線局が、前記無線端末に、詳細な位置情報を取得させる
請求項1から請求項11のいずれかに記載の無線通信システム。 - 前記所定条件が、予め指定された受信品質の測定報告に関する条件を満たしたこと、ハンドオーバの指示を送信又は受信したこと、のいずれかである
請求項1から請求項12のいずれかに記載の無線通信システム。 - 前記無線局が、
前記品質測定の対象とする前記無線端末がハンドオーバを行う場合、当該ハンドオーバ開始時点までの前記品質測定の結果、又は無効値を、ハンドオーバによる中断を示す情報と一緒に、情報収集サーバに報告する
請求項1から請求項13のいずれかに記載の無線通信システム。 - 前記無線局が、
前記品質測定の対象とする前記無線端末に呼切断が生じた場合、当該呼切断(RLF)発生時点までの前記品質測定の結果、又は無効値を、呼切断による中断を示す情報と一緒に、情報収集サーバに報告する
請求項1から請求項14のいずれかに記載の無線通信システム。 - 前記無線局が、
前記無線端末から収集した前記位置に関する情報と、前記品質測定の結果とを、1つのQoS情報要素として情報収集サーバに報告する
請求項1から請求項15のいずれかに記載の無線通信システム。 - 前記QoS情報要素が、
端末固有情報、
コアネットワーク負荷情報、
無線アクセスネットワーク負荷情報、
前記無線端末の移動速度関連情報、
前記無線端末の無線ベアラ関連情報、
無線リンク情報
の少なくとも一つを含む
請求項16のいずれかに記載の無線通信システム。 - 前記無線局が、
上位のネットワークノードから指示を受け、サービス品質に関連する品質測定を行い、前記品質測定の対象となる前記無線端末の位置に関する情報を収集する
請求項1から請求項17のいずれかに記載の無線通信システム。 - 前記無線端末が、
前記無線局から指示を受け、サービス品質に関連する品質測定を行う
請求項1から請求項17のいずれかに記載の無線通信システム。 - 前記無線局が、
前記所定条件を満たすか否かを判定し、前記品質測定の対象とする前記無線端末に前記位置に関する情報を1つ以上取得する指示を行う
請求項1から請求項19のいずれかに記載の無線通信システム。 - 前記無線端末が、
前記所定条件を満たすか否かを判定し、前記位置に関する情報を取得する
請求項1から請求項19のいずれかに記載の無線通信システム。 - 無線端末と無線局との間の通信におけるサービス品質に関連する品質測定を行う無線通信システムにおける無線端末であって、
前記品質測定の実行期間において、所定条件を満たした時点における自身の位置に関する情報を取得し、前記取得した位置に関する情報を前記無線局に報告する位置情報報告手段
を有する無線端末。 - 前記所定条件が、前記品質測定の開始時、終了時の少なくとも一方である
請求項22に記載の無線端末。 - 前記所定条件が、前記品質測定の開始時、及び、終了時である
請求項22又は請求項23のいずれかに記載の無線端末。 - 前記位置情報報告手段は、前記無線局から、1つ以上の位置に関する情報を取得する指示を受け、1つ以上の位置に関する情報を取得する
請求項22から請求項24のいずれかに記載の無線端末。 - 前記品質測定の開始時が、
前記品質測定の対象とするセッションの開始時、
前記品質測定の対象とするセッションの初回データ送信時、
前記品質測定の対象とするセッションの初回データ受信時、
前記品質測定の対象とするセッションの所定のQoS(Quality of Service)に属するデータが発生した時点、
前記品質測定の対象とするセッションの所定のQoSに属するデータの送信時、
前記品質測定の対象とするセッションの所定のLCG(Logical Channel Group)にデータが発生した時点、
前記品質測定の対象とするセッションの所定のLCGのデータの送信時、
のいずれかである
請求項23から請求項25のいずれかに記載の無線端末。 - 前記品質測定の終了時が、
前記品質測定の対象とするセッションの終了時、
前記品質測定の対象とするセッションの終了判定時、
前記品質測定の対象とするセッションの最終データ送信時、
前記品質測定の対象とするセッションの最終データ受信時、
前記品質測定の対象とするセッションの最終データ送信完了時、
前記品質測定の対象とするセッションの最終データ受信完了時、
前記品質測定の対象とするセッションの所定のQoSに属するデータが無くなった時点、
前記品質測定の対象とするセッションの所定のLCGのデータが無くなった時点、
のいずれかである
請求項23から請求項26のいずれかに記載の無線端末。 - 前記所定条件が、当該所定条件を受信した時点からの所定周期であり、
前記位置情報報告手段は、当該所定周期で前記位置に関する情報を取得し、前記無線局に報告する
請求項22から請求項27のいずれかに記載の無線端末。 - 前記所定条件が、当該所定条件を受信した時点からの所定周期であり、
前記位置情報報告手段は、当該所定周期で前記位置に関する情報を取得し、取得した前記位置に関する情報を所定タイミングで前記無線局に報告する
請求項22から請求項27のいずれかに記載の無線端末。 - 前記位置情報報告手段は、
当該無線端末が前回の前記位置に関する情報の報告時から移動した距離が所定値以上である場合、又は、当該無線端末が所定数以上のパケットを送受信した場合に、
前記位置に関する情報を報告する
請求項29に記載の無線端末。 - 前記所定タイミングが、
前記品質測定の開始時、
前記品質測定の終了時、
前記品質測定の対象とするセッション開始時、
前記品質測定の対象とするデータ送受信開始時、
前記品質測定の対象とするセッション終了時、
前記品質測定の対象とするデータ送受信終了時、
前記無線局からの前記位置に関する情報の報告の指示を受けた時点、
の少なくともいずれかである
請求項29又は請求項30に記載の無線端末。 - 前記所定条件が,前記無線端末が詳細な位置情報を取得、又は、更新したことである
請求項22から請求項31のいずれかに記載の無線端末。 - 前記無線局から、詳細な位置情報の取得の指示を受信する
請求項22から請求項32のいずれかに記載の無線端末。 - 前記所定条件が、予め指定された受信品質の測定報告に関する条件を満たしたこと、ハンドオーバの指示を送信又は受信したこと、のいずれかである
請求項22から請求項33のいずれかに記載の無線端末。 - 前記位置情報報告手段は、
前記無線局が前記所定条件を満たすと判定した場合に送信される、前記無線局からの指示に基づいて、前記位置に関する情報を取得する
請求項22から請求項34のいずれかに記載の無線端末。 - 前記位置情報報告手段は、
前記所定条件を満たすか否かを判定し、前記位置に関する情報を取得する
請求項22から請求項34のいずれかに記載の無線端末。 - 前記無線局から指示を受け、サービス品質に関連する品質測定を行う手段
を有する請求項22から請求項36のいずれかに記載の無線端末。 - 無線端末と無線局との間の通信におけるサービス品質に関連する品質測定を行う無線通信システムにおける無線局であって、
前記品質測定の対象とする前記無線端末に、所定条件を満たした時点における位置に関する情報を1つ以上取得させる指示を行う手段と、
前記無線端末の位置に関する情報と、前記品質測定の結果との関連付けを行う手段とを
有する無線局。 - 無線端末と無線局との間の通信におけるサービス品質に関連する品質測定を行う無線通信システムにおけるネットワーク運用管理装置であって、
前記品質測定を行う指示と、
前記品質測定の実行期間において、前記品質測定の対象とする前記無線端末に、所定条件を満たした時点における位置に関する情報を1つ以上取得させる指示と、
前記無線端末の位置に関する情報と前記品質測定の結果とを関連付けて送信させる指示と
を前記無線局に行う手段
を有するネットワーク運用管理装置。 - 無線端末と無線局との間の通信におけるサービス品質に関連する品質測定を行い、
前記品質測定の実行期間において、所定条件を満たした時点における前記無線端末の位置に関する情報を取得し、
前記所定条件を満たした時点における前記無線端末の前記位置に関する情報と、前記品質測定の結果とを関連付ける
通信品質確認方法。
Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/373,330 US11589251B2 (en) | 2012-01-19 | 2013-01-17 | Radio communication system, radio station, radio terminal, network operation management apparatus, and communication quality confirmation method |
| BR122016000899-1A BR122016000899A2 (pt) | 2012-01-19 | 2013-01-17 | Sistema de comunicação por rádio, estação de rádio, terminal de rádio, aparelho de gerenciamento de operação de rede, e método de confirmação de qualidade de comunicação |
| MX2017001524A MX375621B (es) | 2012-01-19 | 2013-01-17 | Sistema de comunicación inalámbrica, estación inalámbrica, terminal inalámbrica, dispositivo de gestión de operaciones de red y método de comprobación de calidad de comunicación. |
| BR112014015665A BR112014015665A2 (pt) | 2012-01-19 | 2013-01-17 | sistema de comunicação sem fio, estação sem fio, terminal sem fio, dispositivo de gerenciamento de operação de rede, e método de confirmação de qualidade de comunicação |
| EP20197398.9A EP3780705A1 (en) | 2012-01-19 | 2013-01-17 | Radio communication system, radio station, radio terminal, network operation management apparatus, and communication quality confirmation method |
| JP2013554327A JP5679137B2 (ja) | 2012-01-19 | 2013-01-17 | 無線通信システム、無線局、無線端末、ネットワーク運用管理装置、及び、通信品質確認方法 |
| CN201380006168.7A CN104067651A (zh) | 2012-01-19 | 2013-01-17 | 无线通信系统、无线站、无线终端、网络运用管理装置以及通信品质确认方法 |
| MX2014008658A MX2014008658A (es) | 2012-01-19 | 2013-01-17 | Sistema de comunicacion inalambrica, estacion inalambrica, terminal inalambrica, dispositivo de gestion de operaciones de red y metodo de comprobacion de calidad de comunicacion. |
| EP13738774.2A EP2806674B1 (en) | 2012-01-19 | 2013-01-17 | Wireless communication system, wireless station, wireless terminal, network operation management device, and communication quality confirmation method |
| MX2016001206A MX345620B (es) | 2012-01-19 | 2013-01-17 | Sistema de comunicación inalámbrica, estación inalámbrica, terminal inalámbrica, dispositivo de gestión de operaciones de red y método de comprobación de calidad de comunicación. |
| PH12014501586A PH12014501586B1 (en) | 2012-01-19 | 2014-07-10 | Radio communication system, radio station, radio terminal, network operation management apparatus, and communication quality confirmation method |
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| US17/471,915 US11812297B2 (en) | 2012-01-19 | 2021-09-10 | Radio communication system, radio station, radio terminal, network operation management apparatus, and communication quality confirmation method |
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