WO2017094636A1 - Dispositif de gestion de communication, système de communication et programme de gestion - Google Patents

Dispositif de gestion de communication, système de communication et programme de gestion Download PDF

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Publication number
WO2017094636A1
WO2017094636A1 PCT/JP2016/085090 JP2016085090W WO2017094636A1 WO 2017094636 A1 WO2017094636 A1 WO 2017094636A1 JP 2016085090 W JP2016085090 W JP 2016085090W WO 2017094636 A1 WO2017094636 A1 WO 2017094636A1
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information
base station
radio
wireless
communication
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PCT/JP2016/085090
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English (en)
Japanese (ja)
Inventor
知紘 松田
雄介 正村
倫太郎 片山
亮一 田中
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株式会社日立製作所
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Priority to JP2017553828A priority Critical patent/JP6527595B2/ja
Publication of WO2017094636A1 publication Critical patent/WO2017094636A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • 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

Definitions

  • the present invention relates to a communication management device, a communication system, and a management program.
  • a communication management server (TMS server) is provided to monitor traffic in the wireless communication system.
  • the communication management server collects data on the congestion degree of the base station.
  • a terminal with low radio wave reception quality (CQI: Channel Quality Indicator) is assigned a low-efficiency encoding method and modulation method from the base station, and when a certain amount of communication is actually performed, This causes a reduction in station bandwidth utilization efficiency.
  • CQI Channel Quality Indicator
  • Patent Document 1 describes detecting a terminal that has poor communication quality in a wireless area and controls traffic in a wired section (see summary).
  • the communication history is collected, and the communication history includes, for example, information on communication in the wireless section between the wireless communication terminal and the base station, and includes the throughput of the wireless section (see paragraph 0015).
  • Patent Document 1 If the technique described in Patent Document 1 is used, it is possible to collect information on the communication quality of the wireless section from the wireless communication terminal and manage the wireless communication system. However, since the wireless base station collects information from the wireless communication terminal, traffic in the wireless section increases. Further, since the radio base station accommodates many radio communication terminals, processing related to the communication quality of each radio communication terminal causes an increase in processing load.
  • an object of the present invention is to obtain quality for determining the utilization efficiency of the base station bandwidth without increasing the processing load and traffic.
  • a representative communication management apparatus is a communication management apparatus that manages a communication system, and that communicates with a plurality of wireless terminals including a first wireless terminal, and communicates with the wireless base station.
  • Managing the communication system and acquiring first information regarding congestion of the plurality of radio terminals in the radio base station, and the first radio between the gateway apparatus and the radio base station.
  • the quality for determining the utilization efficiency of the base station bandwidth can be obtained without increasing the processing load and traffic.
  • FIG. 1 is a diagram illustrating an example of a configuration of a wireless communication system according to a first embodiment. It is a figure which shows the example of a structure of a DPI apparatus. It is a figure which shows the example of a structure of a base station information management table. It is a figure which shows the example of a structure of a user traffic information management table. It is a flowchart which shows the example of a traffic analysis process. It is a figure which shows the example of a RTT measurement opportunity. It is a figure which shows the example of a throughput measurement opportunity. It is a figure which shows the example of a structure of the traffic management server of Example 1. FIG. It is a figure which shows the example of a structure of a base station congestion information management table.
  • FIG. 6 is a diagram illustrating an example of a configuration of a wireless communication system according to a second embodiment. It is a figure which shows the example of a structure of a position management server. It is a figure which shows the example of a structure of a positional infomation management table. It is a flowchart which shows the example of a positional information acquisition process. It is a figure which shows the example of a structure of the traffic management server of Example 2.
  • FIG. 6 is a diagram illustrating an example of a configuration of a wireless communication system according to a second embodiment. It is a figure which shows the example of a structure of a position management server. It is a figure which shows the example of a structure of a positional infomation management table. It is a flowchart which shows the example of a positional information acquisition process. It is a figure which shows the example of a structure of the traffic management server of Example 2.
  • FIG. 6 is a diagram illustrating an example of a configuration of a wireless communication system according to
  • an example of a cellular communication system using LTE standardized by 3GPP is shown as an example of a wireless communication system.
  • FIG. 1 is a diagram illustrating an example of the configuration of the wireless communication system according to the first embodiment.
  • the wireless communication system according to the first embodiment includes an eNodeB (E-UTRAN NodeB) 102 as a base station device, an S-GW (Serving Gateway) 103 and a P-GW (Packet Data Network Gateway) 104 as a gateway device, and a management device. It has a certain MME (Mobility Management Entity) 105, a DPI (Deep Packet Inspection) device 108 which is a packet detailed analysis device, and a traffic management server 109.
  • the eNodeB 102 is connected to a user equipment UE (User Equipment) 101 and a RAN (Radio Access Network) 106 is configured.
  • UE User Equipment
  • RAN Radio Access Network
  • the S-GW 103 has a user plane traffic transfer function.
  • the P-GW 104 has an interface with a PDN (Packet Data Network) 111 which is a packet data network that provides services to users.
  • the P-GW 104 may have PCEF (Policy and Charging and Enforcement and Function).
  • the PCEF performs policy control according to a predetermined policy.
  • the MME has a control plane transfer function, and performs management of the movement of the UE 101, signaling control, and the like.
  • the MME 105 and the S-GW 103 are connected to each other, and the S-GW 103 and the P-GW 104 are connected to each other to configure an EPC (Evolved Packet Core: core network) 107.
  • EPC Evolved Packet Core: core network
  • the DPI device 108 is a device that acquires a packet transferred on the network, and acquires traffic or signaling transmitted / received between the eNodeB 102 and the S-GW 103 and between the eNodeB 102 and the MME 105.
  • the DPI device 108 transmits traffic or signaling information including the acquired communication quality for each UE 101 to the traffic management server 109.
  • the communication quality is the communication quality for each UE 101, and is an index that indicates the reception quality in the downlink direction between the mobile network, that is, the P-GW 104 and the UE 101.
  • the traffic management server 109 estimates the radio quality (for example, CQI) between the eNodeB 102 and the UE 101 and the base station resource amount allocated to the UE 101 by the eNodeB 102 using the information acquired from the DPI device 108.
  • the radio quality is an index indicating the reception quality of radio waves and signals between the UE 101 and the eNodeB 102.
  • the base station resource is an index (for example, frequency bandwidth, time unit, RB: Resource Block) indicating the radio resource that the eNodeB 102 allocates to the UE 101.
  • the traffic management server 109 outputs the estimated wireless quality and base station resource amount to the external device.
  • External devices are all devices including network devices such as the P-GW 104 and S-GW 103 and other commonly used servers.
  • FIG. 1 shows an example of the P-GW 104.
  • the DPI device 108 is installed for each S-GW 103 and MME 105, and is transferred at the reference point S1-U between the eNodeB 102 and the S-GW 103, and traffic transferred at the reference point S11 between the eNodeB 102 and the MME 105. To get.
  • One DPI device 108 may accommodate a plurality of S-GWs 103 and MMEs 105, or a plurality of DPI devices 108 may accommodate one S-GW 103 and one MME 105. Further, the DPI device 108 and the traffic management server 109 may be accommodated in one computer.
  • FIG. 2 is a diagram illustrating an example of the configuration of the DPI device 108.
  • the processing content of the DPI device 108 is stored in the form of a program (software) in the auxiliary storage device 302 of a general computer, and the program read from the auxiliary storage device 302 by the CPU (Central Processing Unit) 304 is stored in the memory 301. Expand and run.
  • the DPI device 108 communicates information related to communication quality with the traffic management server 109 via a network I / F (interface) 305.
  • the DPI device 108 is connected to the reference points S-1U and S11 via the monitoring I / F 306, and receives packets included in the traffic.
  • the DPI device may have a plurality of monitoring I / Fs 306. For example, depending on a plurality of eNodeBs 102, S-GWs 103, and MMEs 105 to be monitored, the DPI device has the monitoring I / Fs 306 corresponding to the number of reference points S-1U and S11. May be.
  • the I / O (input / output interface) 303 is a user interface for the user to input an instruction to the DPI device 108 and present the execution result of the program to the user.
  • Input / output devices for example, a keyboard, a mouse, a touch panel, a display, a printer, etc.
  • the I / O 303 may be connected to a user interface provided by a management terminal connected via a network.
  • the memory 301 of the DPI device 108 stores a traffic analysis program 312.
  • the traffic analysis program 312 is a program for executing traffic analysis processing (see FIG. 5).
  • the memory 301 stores a base station information management table 321 (see FIG. 3) and a user traffic information management table 322 (see FIG. 4).
  • the program executed by the CPU 304 is provided to the DPI device 108 via a removable medium (CD-ROM, flash memory, etc.) or a network, and is stored in the auxiliary storage device 302 that is a non-temporary storage medium. For this reason, the DPI device 108 may have an interface for reading data from a removable medium.
  • the DPI device 108 is a computer system that is physically configured on a single computer, or logically or physically on a plurality of computers, and programs stored in the memory 301 are separately stored on the same computer. May operate on a virtual machine constructed on a plurality of physical computer resources.
  • FIG. 3 is a diagram showing an example of the configuration of the base station information management table 321.
  • the base station information management table 321 stores congestion information regarding the eNodeB 102.
  • the base station information management table 321 includes an ECGI 3211 in which ECGI (E-UTRAN Cell Global ID) for uniquely identifying the cell of the eNodeB 102 is stored, and a measurement period in which the time at which the congestion information is acquired is stored. 3212.
  • ECGI E-UTRAN Cell Global ID
  • the base station information management table 321 includes the number of connected UEs 3214 in which the number of UEs 101 connected to the identified cell is stored, and the identified cell. It includes a transfer byte count up 3215 in which the amount of uplink data transferred (number of bytes) is stored, and a transfer byte count down 3216 in which the amount of downlink data transferred in the identified cell (number of bytes) is stored.
  • the base station information management table 321 shown in FIG. One line constitutes one unit of information, which is called a record. Similarly, in other tables described below, one row of the table on the drawing is referred to as a record.
  • FIG. 4 is a diagram illustrating a configuration example of the user traffic information management table 322.
  • the user traffic information management table 322 statistical information about the UE 101 connected to the wireless communication system is measured by the DPI device 108 and stored.
  • the user traffic information management table 322 uniquely identifies the cell of the eNodeB 102 to which the IMSI 3221 storing the IMSI (International Mobile Subscriber Identity) for uniquely identifying the UE 101 and the UE 101 identified by the IMSI 3221 are connected. It includes an ECGI 3222 for identification and a time 3223 at which the time when the statistical information is measured is stored.
  • IMSI International Mobile Subscriber Identity
  • the user traffic information management table 322 is identified as the number of transfer bytes 3225 in which the amount of data (number of bytes) transferred by the identified UE 101 is stored. It includes a transfer packet number 3226 in which the number of packets transferred by the UE 101 is stored, and communication quality information 3227 in which information on the communication quality of the identified UE 101 is stored.
  • the communication quality information 3227 includes a throughput (see FIG. 7) such as a data transfer rate, a delay (see FIG. 6) such as an RTT (Round TripTime), and a packet loss rate, but may include only a part of the index shown in the figure. Often, other indicators (such as jitter) indicating the communication quality may be included.
  • FIG. 5 is a flowchart showing an example of traffic analysis processing.
  • the traffic analysis process is a process performed when the traffic analysis program 312 is executed by the CPU 304 of the DPI device 108.
  • the traffic analysis program 312 executes traffic analysis processing and updates the base station information management table 321 and the user traffic information management table 322.
  • the DPI device 108 that executes the traffic analysis program 312 acquires messages at the reference points S1-U and S11 (step 3121), and updates the basic statistical information 3213 of the base station information management table 321 with the acquired messages (step 3121). Step 3122). For example, when the DPI device 108 extracts a TEID (Tunnel Endpoint Identifier) from the user traffic at the reference point S1-U and detects the connection of a new UE 101, the number of connected UEs 3214 is increased. Further, when the release of the connection of the UE 101 is detected, the number of connected UEs 3214 is decreased.
  • TEID Transmission Service Identifier
  • the DPI device 108 measures the communication quality using the S1-U interface (step 3123). Then, based on the measured communication quality, the user traffic information management table 322 is updated (step 3124), and the information updated in the base station information management table 321 and the user traffic information management table 322 is transmitted to the traffic management server 109. (Step 3125).
  • FIG. 6 is a diagram illustrating an example of an RTT measurement opportunity.
  • the DPI device 108 acquires packets transmitted and received between the server provided in the PDN 111 and the UE 101 at packet monitoring points (reference points S-1U and S11) on the network, and measures the RTT.
  • packet monitoring points reference points S-1U and S11
  • RAN RTT measurement 1081 related to SYN packet Measures the time difference between a SYN + Ack packet and an Ack packet with a corresponding sequence number.
  • (2) RAN RTT measurement 1082 for Data packet Measures the time difference between the Data packet and the Ack packet with the corresponding sequence number.
  • a plurality of measurements and an average of a plurality of measurement results may be used, or any one of the measurement results may be used.
  • FIG. 7 is a diagram showing an example of a throughput measurement opportunity.
  • the DPI device 108 acquires the packets transmitted / received between the server provided in the PDN 111 and the UE 101 at the packet monitoring points (reference points S-1U, S11) on the network, and measures the throughput. To do.
  • the throughput is calculated by dividing the total number of transferred bytes of the Data packet transmitted during the throughput measurement period by the time of the throughput measurement period.
  • a throughput obtained by averaging the throughputs measured in a plurality of throughput measurement periods may be used, or a throughput measured in any one of the throughput measurement periods may be used.
  • TCP session throughput measurement 1086 Period from SYN packet to Fin packet.
  • the throughput for each predetermined data transfer amount (for example, 100 Kbytes) may be measured.
  • FIG. 8 is a diagram illustrating an example of the configuration of the traffic management server 109 according to the first embodiment.
  • the traffic management server 109 is configured by a general computer and includes a CPU 204, a memory 201, an auxiliary storage device 202, an I / O 203, a network I / F 205, and a DPI device I / F 206.
  • the I / O 203 is a user interface for the user to input an instruction to the traffic management server 109 and present the execution result of the program to the user.
  • Input / output devices for example, a keyboard, a mouse, a touch panel, a display, a printer, etc.
  • the I / O 203 may be connected to a user interface provided by a management terminal connected via a network.
  • the CPU 204 is a processor that executes a program stored in the memory 201.
  • the memory 201 includes a ROM (Read Only Memory) which is a nonvolatile storage element and a RAM (Random Access Memory) which is a volatile storage element.
  • the ROM stores an invariant program (for example, BIOS: Basic Input Output System).
  • BIOS Basic Input Output System
  • the RAM is a high-speed and volatile storage element such as a DRAM (Dynamic Random Access Memory), and temporarily stores a program stored in the auxiliary storage device 202 and data used when the program is executed.
  • the memory 201 includes a user information notification program 211, a terminal movement determination program 212, a radio quality estimation program 213, a used base station resource estimation program 214, a user information notification determination program 215, and a radio quality estimation formula parameter generation program 216. Is stored.
  • the user information notification program 211 is a program for executing user information notification processing (see FIG. 14).
  • the terminal movement determination program 212 is a program for executing a terminal movement determination process (see FIG. 15).
  • the radio quality estimation program 213 is a program for executing radio quality estimation processing (see FIG. 16).
  • the used base station resource estimation program 214 is a program for executing a used base station resource estimation process (see FIG. 17).
  • the user information notification determination program 215 is a program for executing user information notification determination processing (see FIG. 18).
  • the radio quality estimation formula parameter generation program 216 is a program for executing radio quality estimation processing (see FIG. 19).
  • the memory 201 includes a base station congestion information management table 221 (see FIG. 9), a user information management table 222 (see FIG. 10), a handover information management table 223 (see FIG. 11), and an estimation formula information management table 224 (FIG. 12). And a notification information management table 225 (see FIG. 13) are stored.
  • the auxiliary storage device 202 is a large-capacity and nonvolatile storage device such as a magnetic storage device (HDD: Hard Disk Drive) or a flash memory (SSD: Solid State Drive).
  • the auxiliary storage device 202 stores a program executed by the CPU 204 and data used when the program is executed. That is, the program is read from the auxiliary storage device 202, loaded into the memory 201, and executed by the CPU 204.
  • the network I / F 205 is an interface device that controls communication with other devices (for example, the P-GW 104) via the network.
  • the DPI device I / F 206 is an interface device that controls communication with the DPI device 108. There may be a plurality of DPI device I / Fs 206 depending on the number of DPI devices 108, or they may be shared with the network I / F 205.
  • the program executed by the CPU 204 is provided to the traffic management server 109 via a removable medium (CD-ROM, flash memory, etc.) or a network, and stored in the auxiliary storage device 202 which is a non-temporary storage medium. For this reason, the traffic management server 109 may have an interface for reading data from a removable medium.
  • the traffic management server 109 is a computer system configured on a single physical computer or a plurality of logical or physical computers, and the program stored in the memory 201 is stored on the same computer. It may operate on a separate thread, or may operate on a virtual machine constructed on a plurality of physical computer resources. Further, the traffic management server 109 and other devices may be accommodated in one physical or logical computer. Note that all or part of the processing realized by executing the program may be realized by hardware (for example, Field-Programmable Gate Array).
  • FIG. 9 is a diagram showing an example of the configuration of the base station congestion information management table 221.
  • the base station congestion information management table 221 stores congestion information regarding the eNodeB 102.
  • the base station congestion information management table 221 includes an ECGI 2211 in which ECGI for uniquely identifying the cell of the eNodeB 102 is stored, and a measurement period 2212 in which the time when the congestion information is acquired is stored.
  • the base station congestion information management table 221 includes the number of connected UEs 2214 in which the number of UEs 101 connected to the identified cell is stored, and the identified cell.
  • Each value of the base station congestion information management table 221 is obtained by acquiring each value of the base station information management table 321 of the DPI device 108 from the DPI device 108.
  • FIG. 10 is a diagram showing an example of the configuration of the user information management table 222.
  • the user information management table 222 is obtained by the DPI device 108 measuring statistical information regarding the UE 101 connected to the wireless communication system, and is acquired from the DPI device 108 and stored.
  • the user information management table 222 includes an IMSI 2221 in which an IMSI for uniquely identifying the UE 101 is stored, an ECGI 2222 for uniquely identifying a cell of the eNodeB 102 to which the UE 101 identified by the IMSI 2221 is connected, And a time 2223 at which the time when the statistical information is measured is stored.
  • the user information management table 222 has a transfer byte number 2225 in which the amount of data (number of bytes) transferred by the identified UE 101 is stored, and is transferred by the identified UE 101.
  • the number of transmitted packets 2226 in which the number of packets to be stored can be stored, and communication quality information 2227 in which information on the communication quality of the identified UE 101 is stored are included.
  • the communication quality information 2227 includes a delay such as throughput and RTT and a packet loss rate, but may include only a part of the illustrated index or may include another index (such as jitter) indicating the communication quality.
  • the user information management table 222 includes a movement determination result 2228 in which a result of determining whether or not the UE 101 is moving by the traffic management server 109 is stored.
  • FIG. 11 is a diagram showing an example of the configuration of the handover information management table 223.
  • the handover information management table 223 information of the eNodeB 102 to which the UE 101 is connected before and after the handover is measured by the DPI device 108, acquired from the DPI device 108, and stored.
  • the handover information management table 223 includes an IMSI 2231 in which an IMSI for uniquely identifying the UE 101 is stored, and a time 2232 in which the time at which the UE 101 identified by the IMSI 2231 is handed over is stored.
  • the handover information management table 223 stores the handover source ECGI 2234 storing the handover source ECGI connected before the handover and the handover destination ECGI connected after the handover. And a handover destination ECGI 2235 to be performed.
  • the information stored in the handover information management table 223 is stored by appending and is not overwritten or deleted for a preset time. For this reason, when the UE 101 identified by the same IMSI is handed over a plurality of times in a short time, information for the number of times of handover is stored together with the time of handover, and the handover information management table 223 becomes log information.
  • the estimation formula information management table 224 stores parameters in mathematical formulas used to estimate radio quality (CQI) and parameters in mathematical formulas used to estimate base station resources.
  • the estimation formula information management table 224 in the example illustrated in FIG. 12A includes an ECGI 2241 in which ECGI for uniquely identifying the cell of the eNodeB 102 to which the parameter is applied, and the radio of the cell identified by the ECGI 2241. And radio quality estimation parameters ( ⁇ 0, ⁇ 1, ⁇ 2) 2242 in which parameters for estimating quality (CQI) by RTT are stored.
  • the estimation formula information management table 224 is a value determined by the modulation scheme and coding rate set for each radio quality (CQI) value (CQI1, CQI2,... CQI15) for the cell identified by ECGI2241. As base station resource estimation efficiency 2243.
  • CQI radio quality
  • the estimation formula information management table 224 of the example shown in FIG. 12B has different parameters in the mathematical formula used for estimating the radio quality (CQI), and the radio quality (CQI) of the cell identified by the ECGI 2241 is the throughput.
  • the wireless quality estimation parameters ( ⁇ 0, ⁇ 1, ⁇ 2) 2242 are stored.
  • the radio quality estimation parameter 2242 is a parameter set by the radio quality estimation formula parameter generation program 216 (see FIG. 19). Whether the radio quality estimation formula parameter generation program 216 measures ⁇ or ⁇ is measured by the radio quality estimation formula parameter generation program 216. It depends on whether the parameter is set based on the result or the parameter set based on the measurement result of the throughput.
  • either ⁇ or ⁇ may be set based on the measurement result of either RTT or throughput, or both ⁇ and ⁇ may be set based on the measurement results of both RTT and throughput. It may be set.
  • the base station resource estimation efficiency 2243 is acquired from information input by the user to the input / output device connected to the I / O 203.
  • FIG. 13 is a diagram showing a configuration example of the notification information management table 225.
  • the notification information management table 225 stores information that the traffic management server 109 notifies the external device.
  • the notification information management table 225 includes an IMSI 2251 in which an IMSI for uniquely identifying the UE 101 is stored, an ECGI 2252 for uniquely identifying a cell of the eNodeB 102 to which the UE 101 identified by the IMSI 2251 is connected, A time 2253 at which the time at which the information to be notified is stored is stored, a radio quality estimate 2254 and a use base station resource estimate at which the radio quality estimated value and the used base station resource estimated value estimated by the traffic management server 109 are stored, respectively. 2255.
  • FIG. 14 is a flowchart showing an example of user information notification processing.
  • the user information notification process is a process performed when the user information notification program 211 is executed by the CPU 204 of the traffic management server 109.
  • the traffic management server 109 starts the terminal movement determination program 212 by the user information notification program 211, executes the terminal movement determination process (see FIG. 15), performs the movement determination of the UE 101, and is not moving.
  • the IMSI of the determined UE 101 is acquired (step 2111).
  • the traffic management server 109 sequentially sets the IMSI acquired in Step 2111 as the target IMSI by the user information notification program 211, and repeatedly executes the processing from Step 2112 to Step 2114.
  • the radio quality estimation program 213 is activated, radio quality estimation processing (see FIG. 16) is executed, and CQI is estimated.
  • the CQI is an index indicating the reception quality of the downlink channel between the eNodeB 102 and the UE 101, and the possible value is predetermined in the radio communication system. For example, 16 levels of CQI values from 0 to 15 are defined, and the modulation scheme and transmission rate are defined corresponding to each CQI value.
  • CQI is used as the radio quality, but RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), RSSI (ReceivedSignalSignalNR), which is a value representing the quality of the radio section other than CQI. (Signal-to-Interference plus Noise power Ratio) or the like may be used.
  • step 2113 the use base station resource estimation program 214 is activated, a use base station resource estimation process (see FIG. 17) is executed, and the amount of base station resources allocated to the UE 101 by the eNodeB 102 is estimated.
  • step 2114 the user information notification determination program 215 is activated, user information notification determination processing (see FIG. 18) is executed, and it is determined whether or not to notify the external device for each UE 101, and is registered in the notification information management table 225. Is done.
  • step 2115 the traffic management server 109 sends the information registered in the notification information management table 225 to the external device. Send.
  • FIG. 15 is a flowchart illustrating an example of the terminal movement determination process.
  • the terminal movement determination process is a process performed when the terminal movement determination program 212 is executed by the CPU 204 of the traffic management server 109.
  • the traffic management server 109 acquires the IMSI registered in the IMSI 2221 of the user information management table 222 by the terminal movement determination program 212 (step 2121), sequentially sets the acquired IMSI as a target, and from step 2122 to step 2122.
  • the processing of 2117 is repeatedly executed.
  • Step 2122 a record including the IMSI 2231 set as the target in the IMSI 2231 is acquired from the handover information management table 223. That is, the handover information related to the UE 101 identified by the target IMSI is acquired.
  • step 2123 it is determined whether a plurality of records are acquired, thereby determining whether the acquired handover information includes a plurality of ECGIs. If it is determined that there are a plurality of ECGIs in the handover information, it is registered in the movement determination result 2228 of the user information management table 222 as a non-mobile terminal (step 2127), and the process ends.
  • the handover information management table 223 stores the time of handover at time 2232 as log information, it is the time of handover information of only the target IMSI acquired in step 2122, and step 2124 has been executed. The number of times included in the time before the period P from the time is acquired.
  • the number of ECGI (handover) acquired in step 2124 is compared with a predetermined threshold A (step 2125). If it is determined that the number of ECGIs is equal to or greater than the predetermined threshold A, it is registered in the movement determination result 2228 of the user information management table 222 as a mobile terminal (step 2126), and the number of ECGIs is smaller than the predetermined threshold A. If it is determined that there is, it is registered in the movement determination result 2228 of the user information management table 222 as a non-mobile terminal (step 2127).
  • the threshold A is acquired from information input by the user to the input / output device connected to the I / O 203.
  • FIG. 16 is a flowchart showing an example of the wireless quality estimation process.
  • the wireless quality estimation process is a process of estimating the wireless quality using the estimation formula derived by the multiple regression analysis, and is a process performed by executing the wireless quality estimation program 213 by the CPU 204 of the traffic management server 109. .
  • the traffic management server 109 acquires RTT or throughput communication quality information from the communication quality information 2227 of the UE 101 that estimates the radio quality in the user information management table 222 by the radio quality estimation program 213 (step 2131).
  • the target UE 101 whose radio quality is to be estimated is the UE 101 identified by the target IMSI that is sequentially set in the loop shown in FIG.
  • Step 2132 the ECGI corresponding to the acquired communication quality information is acquired from the ECGI 2222, and the number of connected UEs 2214 of the basic statistical information 2213 is acquired as congestion information from the base station congestion information management table 221 using the acquired ECGI. . Further, in step 2133, using the ECGI corresponding to the acquired congestion information, the values of ⁇ 0, ⁇ 1, and ⁇ 2 or ⁇ 0, ⁇ 1, and ⁇ 2 of the wireless quality estimation parameter 2242 are acquired from the estimation formula information management table 224. .
  • step 2134 from the communication quality information (RTT or throughput) acquired in step 2131 and the congestion information (number of connected UEs: UE in the equation) acquired in step 2132, using equation (1) or equation (2) Calculate an estimate of radio quality (CQI).
  • RTT communication quality information
  • CQI radio quality
  • step 2135 the calculated estimated CQI value is output (stored) in the memory 201 in association with the target IMSI.
  • FIG. 17 is a flowchart illustrating an example of a use base station resource estimation process.
  • the used base station resource estimation process is a process for estimating the amount of base station resources allocated to the UE 101 by the eNodeB 102, and is a process performed when the used base station resource estimation program 214 is executed by the CPU 204 of the traffic management server 109. .
  • the traffic management server 109 acquires the radio quality estimate (CQI) of the target IMSI estimated using the radio quality estimation program 213 by the use base station resource estimation program 214 (step 2141).
  • the target IMSI is the IMSI that is sequentially set in the loop shown in FIG.
  • the radio quality (step 2141) obtained in step 2141 from the base station resource estimation efficiency 2243 of the estimation formula information management table 224 using the ECGI of the cell of the eNodeB 102 connected to the UE 101 identified by the target IMSI. Efficiency corresponding to CQI) is acquired.
  • the user information management table 222 obtains the downlink transfer byte number from the transfer byte number 2225 of the record in which the target IMSI is included in the IMSI 2221.
  • the base station resource amount allocated to the UE 101 by the eNodeB 102 using the formula (3) from the efficiency acquired in step 2142 and the downlink transfer byte count acquired in step 2143 (transmit_byte in the formula). Calculate the estimate of.
  • step 2145 the calculated estimated value of the used base station resource amount is output (stored) in the memory 201 in association with the target IMSI.
  • FIG. 18 is a flowchart illustrating an example of user information notification determination processing.
  • the user information notification determination process is a process of selecting user information to be notified based on a specific condition and registering it in the notification information management table 225.
  • the user information notification determination program 215 is executed by the CPU 204 of the traffic management server 109. It is a process performed by doing.
  • the user information notification determination program 215 causes the traffic management server 109 to acquire the CQI and the used base station resource amount related to the target IMSI estimated by the radio quality estimation program 213 and the used base station resource estimation program 214, respectively (step 2151). ).
  • the target IMSI is the IMSI that is sequentially set in the loop shown in FIG.
  • step 2152 the base station resource total value obtained by acquiring and summing the used base station resource estimation values of all UEs 101 connected to the eNodeB 102 to which the UE 101 identified by the target IMSI is connected, and in step 2151
  • the base station resource occupation rate of the UE 101 identified by the target IMSI is calculated from the acquired use base station resource estimation value.
  • the base station resource occupation ratio is obtained by dividing the use base station resource estimated value acquired in step 2151 by the base station resource total value.
  • the base station resource total value is obtained even if the information of the base station resource total value of the eNodeB 102 to which the UE 101 identified by the target IMSI is connected is obtained from information input by the user to the input / output device connected to the I / O 203. Good.
  • the base station stored in the memory 201 based on the memory 201 or the notification information management table 225 as a result of completing the processing for all the IMSIs acquired in step 2121 by the user information notification program 211 executed previously.
  • the estimated value of the resource amount may be summed, or the estimated value of the used base station resource amount registered in the used base station resource estimated value 2255 of the notification information management table 225 may be summed.
  • step 2153 the calculated base station resource occupancy is compared with a predetermined threshold B, and if it is determined that the base station resource occupancy is smaller than the predetermined threshold B, the process ends.
  • the CQI estimated value is compared with the predetermined threshold C and threshold D under the following conditions (step 2154).
  • Condition 1 CQI estimated value ⁇ threshold value
  • Condition 2 CQI estimated value ⁇ threshold value D
  • threshold C and threshold D are thresholds for defining the CQI range for notifying the radio quality estimation value and the like
  • threshold B is a threshold for determining the base station resource occupancy range. These threshold values may be arbitrarily set by the user by an input / output device connected to the I / O 203. If it is determined that either condition 1 or condition 2 is satisfied, in step 2155, the wireless quality estimated value 2254 and the used base station resource estimated value 2255 of the notification information management table 225 are registered.
  • the estimated value of the radio quality of the UE 101 is calculated only by monitoring the normal communication without directly acquiring the radio quality information from the UE 101. For this reason, even if the radio quality is necessary in the normal use state of the user, the estimated value of the radio quality can be obtained without increasing traffic. Moreover, since a dedicated program for transmitting radio quality to the UE 101 is not required, the introduction cost can be suppressed. And it can be used for the bandwidth utilization rate improvement of eNodeB102 by the band control to UE101 with bad radio quality.
  • FIG. 19 is a flowchart illustrating an example of an estimation formula parameter generation process.
  • the estimation formula parameter generation processing is processing for generating the radio quality estimation parameter 2242 of the estimation formula information management table 224, and is performed by executing the radio quality estimation formula parameter generation program 216 by the CPU 204 of the traffic management server 109. It is processing.
  • the traffic management server 109 acquires the period T used for parameter calculation (step 2161) and the ECGI list (step 2162) by the wireless quality estimation formula parameter generation program 216.
  • the period T and the ECGI list are acquired from information input by the user to the input / output device connected to the I / O 203.
  • the period T is, for example, a test period.
  • radio quality (CQI) is acquired from the UE 101 and recorded together with the acquired time.
  • information is acquired from the DPI device 108 measured in the period T and stored in each of the base station congestion information management table 221 and the user information management table 222.
  • the period T may be a period in which the radio quality acquisition count and the DPI device 108 measurement count are sufficient for statistical processing.
  • the traffic management server 109 sequentially sets the ECGI included in the ECGI list acquired in step 2162 as the target ECGI by the wireless quality estimation formula parameter generation program 216, and repeatedly executes the processing from step 2163 to step 2167.
  • Step 2163 in the loop in the base station congestion information management table 221, the number of connected UEs 2214 of the record including the target ECGI in the ECGI 2211 and the time of the measurement period 2212 included in the period T is acquired as the base station congestion information.
  • the communication quality information 2227 of the record in which the ECGI 2222 includes the target ECGI and the time 2223 is included in the period T is acquired.
  • the base station congestion information and communication quality information acquired in step 2153 are filtered.
  • the estimation equation parameter may be calculated using only significant data as statistical information. Therefore, from the acquired base station congestion information and communication quality information, for example, the influence of noise An abnormal value generated by such as may be removed. Moreover, you may remove the data of the high-order and low-order predetermined ratio (for example, 10%) of each acquired base station congestion information and communication quality information. Moreover, you may filter by radio
  • step 2165 the base station congestion information filtered in step 2164 and the communication quality information are merged in association with time based on the measurement period 2212 and time 2223. Furthermore, the radio quality recorded with the time is also merged in association with the time. Based on a plurality of times included in the period T, there are a plurality of sets of radio quality, base station congestion information, and communication quality information.
  • radio quality is set as an objective variable
  • base station congestion information and communication quality information associated in step 2165 are set as explanatory variables
  • an estimation formula parameter is calculated by maximum likelihood estimation.
  • an estimation formula is obtained by maximum likelihood estimation.
  • the values of parameters ⁇ 0, ⁇ 1, and ⁇ 2 are calculated.
  • estimation is performed by maximum likelihood estimation using a plurality of sets of radio quality (CQI), communication quality information (throughput), and base station congestion information (number of connected UEs) associated with each other in step 2165, and equation (2). Calculate the values of the expression parameters ⁇ 0, ⁇ 1, and ⁇ 2.
  • step 2167 the estimation formula parameter calculated in step 2166 is stored in the radio quality estimation parameter 2242 of the record in which the ECGI 2241 of the estimation formula information management table 224 includes the target ECGI.
  • FIG. 20 is a diagram illustrating an example of the configuration of the wireless communication system according to the second embodiment.
  • the wireless communication system according to the second embodiment includes the UE 101 and the eNodeB 102 included in the RAN 106, the S-GW 103, the P-GW 104, the MME 105, the DPI device 108, and the PDN 111 included in the EPC 107, which are the same as those described in the first embodiment. Since it is the same, explanation is omitted.
  • the location management server 110 acquires location information from the UE 101 via the EPC 107 based on the UE 101 information received from the traffic management server 109, and transmits the location information to the traffic management server 109.
  • the traffic management server 109 uses the information acquired from the DPI device 108 to determine the radio quality (for example, received power, CQI) of the radio section between the eNodeB 102 and the UE 101 and the amount of base station resources allocated to the UE 101 by the eNodeB 102.
  • the location information of the UE 101 is acquired from the location management server 110, and information on the radio quality according to the location is provided.
  • FIG. 21 is a diagram showing an example of the configuration of the location management server 110.
  • the processing contents of the location management server 110 are stored in the form of a program (software) in the auxiliary storage device 402 of a general computer, and the CPU 404 expands the program read from the auxiliary storage device 402 on the memory 401 and executes it. To do.
  • the location management server 110 communicates with the traffic management server 109 and the UE 101 via the network I / F 405.
  • Input / output devices for example, a keyboard, a mouse, a touch panel, a display, a printer, etc.
  • the memory 401 of the location management server 110 stores a location information acquisition program 411 for executing location information acquisition processing (see FIG. 23), and stores a location information management table 421 (see FIG. 22).
  • the program executed by the CPU 404 is provided to the location management server 110 via a removable medium (CD-ROM, flash memory, etc.) or a network, and stored in the auxiliary storage device 402 that is a non-temporary storage medium. For this reason, the location management server 110 may have an interface for reading data from a removable medium.
  • the location management server 110 is a computer system that is physically configured on a single computer or logically or physically on a plurality of computers, and the program stored in the memory 401 is stored on the same computer. It may operate on a separate thread, or may operate on a virtual machine constructed on a plurality of physical computer resources.
  • the location management server 110 acquires location information from the identified UE 101 using the IMSI that uniquely identifies the UE 101 acquired from the traffic management server 109, and Output to the traffic management server 109.
  • FIG. 22 is a diagram showing an example of the configuration of the position information management table 421.
  • the location information management table 421 stores location information collected from the UE 101.
  • the location information management table 421 includes an IMSI 4211 in which an IMSI for uniquely identifying the UE 101 is stored, and an ECGI 4212 for uniquely identifying a cell of the eNodeB 102 to which the UE 101 identified by the IMSI 4211 is connected.
  • the time 4213 when the time when the UE 101 measured the position information is stored, and the position 4214 where the latitude and longitude, which are the position information of the UE 101 identified by the IMSI 4211, are stored.
  • FIG. 23 is a flowchart showing an example of position information acquisition processing.
  • the position information acquisition process is a process performed when the position information acquisition program 411 is executed by the CPU 404 of the position management server 110.
  • the location management server 110 acquires the IMSI of the UE 101 that is the location information acquisition target from the traffic management server 109 by the location information acquisition program 411 (step 4111).
  • the UE 101 identified by the acquired IMSI is the target UE 101.
  • Step 4112 a location information acquisition request is transmitted to the target UE 101 and the location information is acquired from the target UE 101.
  • the information acquired from the target UE 101 may include measurement values such as radio quality measured by the UE 101 in addition to the position information.
  • the acquired location information of the UE 101 is registered in the location information management table 421.
  • the acquired location information of the UE 101 is transmitted to the traffic management server 109.
  • a measurement value such as radio quality
  • it may be transmitted to the traffic management server 109.
  • FIG. 24 is a diagram illustrating an example of the configuration of the traffic management server 109 according to the second embodiment.
  • the traffic management server 109 according to the second embodiment is configured by a general computer, and includes a CPU 204, a memory 201, an auxiliary storage device 202, an I / O 203, a network I / F 205, and a DPI device I / F 206, and is stored in the memory 201. Except for a part of the program and the table to be executed, these are the same as those described in the first embodiment, and thus description thereof is omitted.
  • the memory 201 stores a terminal movement determination program 212, a radio quality estimation program 213, a use base station resource estimation program 214, a user information notification determination program 215, and a radio quality estimation formula parameter generation program 216. Further, the memory 201 stores a base station congestion information management table 221, a user information management table 222, a handover information management table 223, and an estimation formula information management table 224. Since these are the same as those described in the first embodiment, description thereof will be omitted.
  • the memory 201 includes a wireless quality map drawing program 217 that executes wireless quality map drawing processing (see FIG. 27) and a wireless quality distribution statistical map drawing program 218 that executes wireless quality distribution statistical map drawing processing (see FIG. 28).
  • the memory 201 stores a radio quality map information management table 226 (see FIG. 25) and a radio quality distribution statistical map information management table 227 (see FIG. 26).
  • FIG. 25 is a diagram showing a configuration example of the wireless quality map information management table 226.
  • the radio quality map information management table 226 stores information regarding the UE 101 that the traffic management server 109 instructs the location management server 110 to acquire location information and the location information of the UE 101 acquired from the location management server 110.
  • the radio quality map information management table 226 includes an IMSI 2261 in which an IMSI for uniquely identifying the UE 101 is stored.
  • the radio quality map information management table 226 includes an ECGI 2262 for uniquely identifying the cell of the eNodeB 102 to which the UE 101 identified by the IMSI 2261 is connected, a time 2263 in which the time when the estimated value is stored, and traffic management.
  • FIG. 26 is a diagram illustrating a configuration example of the wireless quality distribution statistical map information management table 227.
  • the radio quality distribution statistical map information management table 227 stores grid attributes drawn as a map, and one record represents one grid attribute. Specifically, the radio quality distribution statistical map information management table 227 stores ECGI 2271 for uniquely identifying the cell of the eNodeB 102.
  • the radio quality distribution statistical map information management table 227 includes a position 2272 where the latitude and longitude of the grid included in the cell identified by ECGI 2271 are stored as position information, and the length in the latitude direction of the grid specified by the position 2272.
  • the grid size 2273 in which the width in the vertical direction and the longitude direction are stored, the radio quality 2274 in which radio quality information is stored, and the total amount of data transferred to all UEs 101 in the grid specified by the position 2272 are stored.
  • the total number of transferred bytes 2275 is included.
  • FIG. 27 is a flowchart showing an example of the wireless quality map drawing process.
  • the wireless quality map drawing process is a process performed when the wireless quality map drawing program 217 is executed by the CPU 204 of the traffic management server 109.
  • Steps 2171 to 2174 are the same as steps 2111 to 2114 described with reference to FIG. 14 of the first embodiment. However, although it is registered in the notification information management table 225 in step 2114, it is registered in the radio quality map information management table 226 in step 2174.
  • the traffic management server 109 transmits the IMSI registered in the IMSI 2261 of the radio quality map information management table 226 to the location management server 110 in order to acquire the location information of the UE 101 by the radio quality map drawing program 217 (step 2175).
  • the IMSI determined based on the threshold B, the threshold C, and the threshold D is registered in the IMS 2261 of the wireless quality map information management table 226.
  • the location information of the UE 101 is acquired from the location management server 110.
  • the information acquired from the location management server 110 may include not only location information of the UE 101 but also information such as radio quality measured by the UE 101.
  • the location information of the UE 101 acquired in step 2176 is registered in the location 2267 of the radio quality map information management table 226.
  • the acquired wireless quality may be registered in the wireless quality acquisition value 2266 of the wireless quality map information management table 226.
  • the wireless quality is displayed on the map based on the position information registered at the position 2267 of the wireless quality map information management table 226 (see FIG. 29).
  • the wireless quality may be the wireless quality of the wireless quality acquired value 2266 when the wireless quality is registered in the wireless quality acquired value 2266 in step 2177, and may be the wireless quality of the wireless quality estimated value 2264 when not registered.
  • FIG. 28 is a flowchart showing an example of a wireless quality distribution statistical map drawing process.
  • the wireless quality distribution statistical map drawing process is a process performed when the wireless quality distribution statistical map drawing program 218 is executed by the CPU 204 of the traffic management server 109.
  • the traffic management server 109 divides the drawing area map into lattices by the radio quality distribution statistical map drawing program 218 (step 2181).
  • the traffic management server 109 sets the divided and unprocessed grids sequentially as the target grids by the wireless quality distribution statistical map drawing program 218, and repeatedly executes the processing from step 2182 to step 2189.
  • step 2182 in the loop information about the UE 101 located in the target lattice is acquired from the radio quality map information management table 226. Specifically, information is acquired from IMSI 2261, ECGI 2262, time 2263, radio quality estimated value 2264, and position 2267 based on the position information of position 2267.
  • step 2183 noise processing is performed on the acquired information regarding the UE 101. For example, by removing abnormal values, GPS measurement errors and CQI outliers are removed. Further, for example, an abnormal value generated due to the influence of noise or the like may be removed, and upper and lower predetermined ratio data (for example, 10%) may be removed.
  • upper and lower predetermined ratio data for example, 10%
  • step 2184 the variance of the estimated value of the noise-processed CQI is calculated, and in step 2185, the calculated variation is compared with a predetermined threshold E set in advance. As a result, if it is determined that the calculated variation is greater than or equal to the predetermined threshold E, the target grid is too large, so in step 2186, the target grid is further divided, and the grid generated by the division is not processed.
  • the lattice is
  • step 2187 a representative value of the estimated value of CQI subjected to noise processing is determined in step 2187, and the wireless quality 2274 of the wireless quality distribution statistical map information management table 227 is determined.
  • step 2188 the number of transfer bytes of the UE 101 located in the target lattice is acquired from the number of transfer bytes 2225 of the user information management table 222.
  • step 2189 the acquired number of transfer bytes is totaled to obtain a wireless quality distribution.
  • the total number of transfer bytes 2275 of the statistical map information management table 227 is registered.
  • step 2189 the total number of transfer bytes is registered in the radio quality distribution statistical map information management table 227.
  • the number of UEs 101 located in the target grid and the transfer of UE 101 located in the target grid are described. You may register the total number of transfer packets which totaled the number of packets, and the total throughput which totaled the throughput of UE101 located in the object grid
  • the total number of transfer bytes may be displayed on the map based on the position 2272, the size of the grid 2273, and the total number of transfer bytes 2275 in the radio quality distribution statistical map information management table 227 (see FIG. 30).
  • FIG. 29 is a diagram showing an example of a wireless quality map.
  • the radio quality map shown in FIG. 29 is displayed on the map on the basis of the position information by dividing the radio quality for each UE 101 into multiple ranks.
  • one symbol represents the CQI rank of one UE 101, and the CQI value is divided into three ranks of 1 to 5, 6 to 10, and 11 to 15.
  • any number of ranks may be used. .
  • an example in which only the information related to the UE 101 registered in the radio quality map information management table 226 is displayed on the map is limited to the UE 101 having a low CQI value due to the threshold D.
  • the UE 101 with the CQI value of 11 to 15 is not registered in the radio quality map information management table 226, and the UE 101 with the CQI values of 1 to 5 and 6 to 10 is displayed on the map.
  • FIG. 30 is a diagram showing an example of a radio quality distribution statistical map.
  • the wireless quality distribution statistical map shown in FIG. 30 shows the total number of transfer bytes registered in the wireless quality distribution statistical map information management table 227 in the wireless quality distribution statistical map drawing process in an area divided into grids of a predetermined size. This is a visual representation of each grid divided into multiple stages.
  • the total number of transfer bytes is 0 to 100000 bytes Low, 100001 to 200000 bytes Middle, and 200001 bytes or more High.
  • the rank of the total number of transferred bytes is three, but the number of ranks of the total number of transferred bytes may be any number.
  • the map may be a three-dimensional map having an x-axis, y-axis, and z-axis, and the total number of transfer bytes may be expressed by a z-axis graph in the height direction. Also, instead of the total number of transfer bytes, the number of UEs 101 located in each grid, the total number of transfer packets obtained by summing the number of transfer packets of UE 101 located in each grid, and the total throughput of UE 101 located in each grid The total throughput may be displayed on the map.
  • the above-described processing by the program or the like may be realized by hardware, for example, by designing a part or all of the processing with an integrated circuit, or the processing by the hardware and the processing by the program may be combined.
  • Information such as programs and tables can be stored in a storage device such as a memory, an HDD (Hard Disk Drive), or an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
  • the control lines and information lines indicate those necessary for explanation, and there may be control lines and information lines other than those shown.

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  • Engineering & Computer Science (AREA)
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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif de gestion de communication pour gérer un système de communication, lequel dispositif gère le système de communication comprenant une station de base radio qui communique par radio avec une pluralité de terminaux radio comprenant un premier terminal radio, et un dispositif de passerelle qui communique avec la station de base radio. Le dispositif de gestion de communication acquiert des premières informations concernant la congestion de la pluralité de terminaux radio au niveau de la station de base radio, acquiert des secondes informations concernant une communication pour le premier terminal radio entre le dispositif de passerelle et la station de base radio, et utilise les premières informations et les secondes informations acquises pour calculer une valeur estimée de la qualité associée à la radio à partir de la station de base radio au niveau du premier terminal radio.
PCT/JP2016/085090 2015-12-04 2016-11-28 Dispositif de gestion de communication, système de communication et programme de gestion WO2017094636A1 (fr)

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WO2020209471A1 (fr) * 2019-04-09 2020-10-15 애니파이 주식회사 Dispositif de fourniture d'informations de prédiction de qualité destiné à fournir un accès variable de réseau sans fil dynamique basé sur une prédiction de qualité et procédé d'utilisation associé, et dispositif terminal sans fil et procédé d'utilisation associé
JP2021150896A (ja) * 2020-03-23 2021-09-27 株式会社日立製作所 通信システム、及び通信管理方法
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JP2018019368A (ja) * 2016-07-29 2018-02-01 日本電信電話株式会社 通信品質推定装置、通信品質推定方法及びプログラム
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