WO2022208915A1 - 無線通信システム、無線通信方法、無線通信プログラム - Google Patents
無線通信システム、無線通信方法、無線通信プログラム Download PDFInfo
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- WO2022208915A1 WO2022208915A1 PCT/JP2021/023558 JP2021023558W WO2022208915A1 WO 2022208915 A1 WO2022208915 A1 WO 2022208915A1 JP 2021023558 W JP2021023558 W JP 2021023558W WO 2022208915 A1 WO2022208915 A1 WO 2022208915A1
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- 238000004891 communication Methods 0.000 title claims abstract description 393
- 238000000034 method Methods 0.000 title claims description 7
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000010295 mobile communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/50—Connection management for emergency connections
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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
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
- H04W76/34—Selective release of ongoing connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/14—Backbone network devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to wireless communication technology.
- the present invention has been made in view of this situation, and its object is to provide a wireless communication system that can facilitate connection to other wireless communication networks during priority communication.
- a wireless communication system provides a priority communication detection unit that detects priority communication from a communication device that performs wireless communication, and a communication device that detects priority communication.
- a connection unit connecting to a second wireless communication network different from the first wireless communication network, and notifying the first wireless communication network that the connection of the communicator to the second wireless communication network results from the detected priority communication. and a notification unit.
- the first wireless communication network is notified that the communication device has been connected to the second wireless communication network (another wireless communication network) due to the priority communication. Misrecognition of errors can be prevented.
- Another aspect of the present invention is a wireless communication method.
- This method includes a priority communication detection step of detecting priority communication from a communication device that performs wireless communication, and connecting the communication device in which the priority communication is detected to a second wireless communication network different from the first wireless communication network being connected. and a notification step of notifying the first wireless communication network that the connection of the communicator to the second wireless communication network results from the detected priority communication.
- FIG. 1 schematically shows an overview of a wireless communication system
- 3 is a functional block diagram of a priority communication processing device
- FIG. A first processing example of the priority communication processing device is shown.
- a first processing example of the priority communication processing device is shown.
- FIG. 1 schematically shows an overview of a radio communication system 1 according to an embodiment of the present invention.
- Radio communication system 1 uses NR (New Radio) or 5G NR (Fifth Generation New Radio) as a radio access technology (RAT: Radio Access Technology), and uses 5GC (Fifth Generation Core) as a core network.
- 5G wireless communication network 11 that conforms to the 5th generation mobile communication system (5G), LTE (Long Term Evolution) and LTE-Advanced as radio access technology, and EPC (Evolved Packet Core) as the core network.
- 5G wireless communication network 11 that conforms to the 5th generation mobile communication system (5G), LTE (Long Term Evolution) and LTE-Advanced as radio access technology, and EPC (Evolved Packet Core) as the core network.
- 5G wireless communication network 11 that conforms to the 5th generation mobile communication system (5G), LTE (Long Term Evolution) and LTE-Advanced as radio access technology, and EPC (Evolved Pack
- the 5G wireless communication network 11 includes a plurality of 5G base stations 111A capable of communicating with communication devices 2A, 2B, and 2C (hereinafter collectively referred to as communication devices 2) such as smartphones, also called UE (User Equipment), by 5G NR. , 111B, and 111C (hereinafter sometimes collectively referred to as 5G base stations 111).
- a base station 111 in 5G is also called a gNodeB (gNB).
- the coverage or support area of each 5G base station 111A, 111B, 111C is referred to as a cell and is illustrated as 112A, 112B, 112C, respectively (hereinafter collectively referred to as cell 112).
- the size of the cell 112 of each 5G base station 111 is arbitrary, but typically ranges from several meters to tens of kilometers in radius. Although there is no established definition, cells with radii of a few meters to tens of meters are called femtocells, cells with radii of tens of meters to tens of meters are called picocells, and cells with radii of tens of meters to hundreds of meters are called microcells. A cell with a radius exceeding several hundred meters is sometimes called a macrocell. In 5G, high-frequency radio waves such as millimeter waves are often used, and because of their high linearity, radio waves are blocked by obstacles, shortening the communication range. For this reason, 5G tends to use smaller cells more often than 4G and earlier generations.
- communication device 2B in cells 112A and 112B can communicate with both 5G base stations 111A and 111B by 5G NR.
- the communication device 2C in the cell 112C can communicate with the 5G base station 111C by 5G NR. Since the communication device 2A is outside all of the 5G cells 112A, 112B, and 112C, it is in a state where it cannot communicate by 5G NR.
- 5G communication by 5G NR between each communication device 2 and each 5G base station 111 is managed by 5GC, which is a core network.
- the 5GC exchanges data with each 5G base station 111, exchanges data with external networks such as the EPC and the Internet, manages movement of the communication device 2, and the like.
- the 4G wireless communication network 12 includes a plurality of 4G base stations 121 (only one is shown in FIG. 1) capable of communicating with the communication device 2 by LTE or LTE-Advanced.
- the base station 121 in 4G is also called eNodeB (eNB). Similar to each 5G base station 111 , the coverage or support area of each 4G base station 121 is also referred to as a cell and illustrated as 122 .
- the communication devices 2A and 2B in the cell 122 can communicate with the 4G base station 121 by LTE or LTE-Advanced. Since the communication device 2C is outside the cell 122, it is in a state where communication by LTE or LTE-Advanced cannot be performed.
- 4G communication by LTE or LTE-Advanced between each communication device 2 and each 4G base station 121 is managed by EPC, which is a core network.
- EPC exchanges data with each 4G base station 121, exchanges data with external networks such as 5GC and the Internet, manages movement of the communication device 2, and the like.
- the communication device 2A is in a state capable of 4G communication with the 4G base station 121
- the communication device 2B is in a state of 5G communication with the 5G base stations 111A and 111B. and 4G communication with the 4G base station 121 is possible
- the communication device 2C is in a state where 5G communication with the 5G base station 111C is possible. If there are multiple base stations (111A, 111B, 121) that can communicate like the communication device 2B, the one that is determined to be optimal from the viewpoint of communication quality, etc. under the management of the core network 5GC and/or EPC One base station is selected to communicate with the communication device 2B.
- FIG. 2 is a functional block diagram of the priority communication processing device 3 implemented in the wireless communication system 1.
- the priority communication processing device 3 includes a priority communication detection unit 31 , a comparison unit 32 , a connection unit 33 , a notification unit 34 and a disconnection unit 35 .
- These functional blocks are realized through cooperation between hardware resources such as the computer's central processing unit, memory, input device, output device, and peripheral devices connected to the computer, and software executed using them. .
- hardware resources such as the computer's central processing unit, memory, input device, output device, and peripheral devices connected to the computer, and software executed using them.
- each of the above functional blocks may be implemented using the hardware resources of a single computer, or may be implemented by combining hardware resources distributed among multiple computers. .
- some or all of the above functional blocks are the communication device 2, the base station 111 and core network (5GC) in the 5G wireless communication network 11, the base station 121 and core network (5GC) in the 4G wireless communication network 12 EPC), other components in the operation system of the wireless communication system 1, and any communication device capable of communicating with the wireless communication system 1 are implemented by at least one of hardware resources.
- the communication device 2 the base station 111 and core network (5GC) in the 5G wireless communication network 11
- the base station 121 and core network (5GC) in the 4G wireless communication network 12 EPC other components in the operation system of the wireless communication system 1
- any communication device capable of communicating with the wireless communication system 1 are implemented by at least one of hardware resources.
- the communication device 2 in FIG. 2 is in a state capable of 5G communication with the 5G base station 111 and 4G communication with the 4G base station 121. It is assumed that the communicator 2 is initially connected to the 5G wireless communication network 11 as the first wireless communication network. When the communication device 2 starts priority communication in this state, the communication device 2 is connected to the 4G wireless communication network 12 as the second wireless communication network, which is judged to have better communication quality than the 5G wireless communication network 11 in the following example. and disconnected from the 5G wireless communication network 11.
- the communication device 2 that started priority communication is disconnected from the connected 4G wireless communication network 12 (first wireless communication network), and it is determined that the communication quality is better. may be connected to the 5G wireless communication network 11 (second wireless communication network).
- the priority communication detection unit 31 detects priority communication from the wireless communication device 2.
- the communication device 2 is connected to the 5G wireless communication network 11 when priority communication is started.
- Priority communication refers to communication or telephone calls to which priority, importance, urgency, etc., are set or assigned higher than those of normal communications, and includes, for example, calls to emergency telephone numbers.
- the number 110 is assigned to emergency calls to the police
- the number 119 is assigned to emergency calls to the fire department
- the number 118 is assigned to emergency calls to the Japan Coast Guard.
- Emergency calls by eCall which is an emergency call system for car accidents in Europe, are also an example of priority communication. It corresponds to machine 2.
- reporting by Emergency Services Fallback (ES-FB) and EPS Fallback (Evolved Packet System Fallback) specified in the 5th generation mobile communication system is an example of priority communication.
- the comparison unit 32 compares the communication quality of the 5G wireless communication network 11 (first wireless communication network) and the 4G wireless communication network 12 (second wireless communication network) with which the communication device 2 can communicate.
- An index for comparing communication quality is arbitrary, but the communication quality of each wireless communication network can be evaluated based on, for example, signal strength, throughput, delay time, packet loss rate, packet error rate, and the like. In the illustrated example, it is assumed that the comparison unit 32 has obtained a comparison result that the communication quality of the 4G wireless communication network 12 is superior to that of the 5G wireless communication network 11 to which the communication device 2 is currently connected.
- connection unit 33 the priority communication is detected by the priority communication detection unit 31 according to the comparison result of the comparison unit 32 that the communication quality of the 4G wireless communication network 12 is superior to the communication quality of the 5G wireless communication network 11.
- the communicator 2 connects to a 4G wireless communication network 12 different from the 5G wireless communication network 11 to which it is connected.
- the notification unit 34 notifies the 5G wireless communication network 11 that the connection of the communication device 2 to the 4G wireless communication network 12 by the connection unit 33 is due to the priority communication detected by the priority communication detection unit 31 .
- the disconnecting unit 35 disconnects the communication device 2 from the 5G wireless communication network 11 after the notification unit 34 has notified the 5G wireless communication network 11 .
- the 5G wireless communication network 11 can recognize in advance from the notification from the notification unit 34 that the disconnection of the communication device 2 by the disconnection unit 35 is caused by the priority communication.
- Unnecessary exception processing can be omitted or avoided without erroneously recognizing errors such as movement of the device 2 out of the cell 112, radio link failure (RLF: Radio Link Failure), and power failure of the communication device 2.
- connection unit 33 may connect the communication device 2 to the 4G wireless communication network 12 after the communication device 2 is disconnected from the 5G wireless communication network 11, or may connect the communication device 2 to the 4G wireless communication network 12. may connect the communicator 2 to the 4G wireless communication network 12 before the is disconnected from the 5G wireless communication network 11 .
- FIG. 3 shows a first processing example of the priority communication processing device 3.
- the notification unit 34 is provided in the communication device 2 .
- “S” means step or process.
- the communication device 2 UE
- the 5G wireless communication network 11 NW#1
- the communication device 2 starts priority communication
- the priority communication detection unit 31 realized by the communication device 2 and the 5G wireless communication network 11 detects priority communication.
- the comparison unit 32 implemented by the communication device 2, the 5G wireless communication network 11, the 4G wireless communication network 12, etc. compares the communication quality of the 5G wireless communication network 11 and the 4G wireless communication network 12 (NW#2). .
- the priority communication detected in S12 causes the communication device 2 to switch to 5G.
- the notification unit 34 realized by the communication device 2 performs 5G wireless communication.
- the network 11 is notified.
- This notification from the communication device 2 is on the access stratum (AS: Access Stratum) and the non-access stratum (NAS: Non-Access Stratum), which are functional layers in the Universal Mobile Telecommunications System (UMTS) protocol stack. message to the 5G wireless communication network 11 .
- AS Access Stratum
- NAS Non-Access Stratum
- the disconnecting unit 35 disconnects the communication device 2 from the 5G wireless communication network 11 after the notification in S14.
- the operation system (OPS) of the 5G wireless communication network 11 or the wireless communication system 1 that received the notification from the communication device 2 in S14 recognizes in advance that the disconnection of the communication device 2 in S15 is caused by the priority communication detected in S12. Therefore, unnecessary exception processing can be omitted without erroneously recognizing the disconnection of the communication device 2 in S15 as an error.
- the radio access technology (RAT) and the public land mobile network (PLMN: Public Land Mobile Network) are transferred from those of the 5G wireless communication network 11 to 4G. Change to that of the wireless communication network 12 .
- the radio access technology will change from NR or 5G NR in 5G to LTE or LTE-Advanced in 4G.
- a PLMN or PLMN number is an identification number for a wireless communication network, and consists of a combination of MCC (Mobile Country Code) representing a country or region and MNC (Mobile Network Code) representing a carrier.
- MCC Mobile Country Code
- MNC Mobile Network Code
- connection of the communication device 2 to the 4G wireless communication network 12 by the connecting unit 33 in S17 is the same as the connection of the communication device 2 from the 5G wireless communication network 11 by the disconnecting unit 35 in S15. Done after cutting.
- FIG. 4 shows a second processing example of the priority communication processing device 3.
- the notification unit 34 is provided in the 4G wireless communication network 12 (NW#2) as the second wireless communication network.
- the communication device 2 (UE) is connected to the 5G wireless communication network 11 (NW#1).
- the communication device 2 starts priority communication, and the priority communication detection unit 31 realized by the communication device 2 and the 5G wireless communication network 11 detects priority communication.
- the comparison unit 32 implemented by the communication device 2, the 5G wireless communication network 11, the 4G wireless communication network 12, etc. compares the communication quality of the 5G wireless communication network 11 and the 4G wireless communication network 12.
- the connection unit 33 connects the communication device 2 to the 4G wireless communication network 12 . In this way, priority communication with high priority can be executed in the 4G wireless communication network 12 with high communication quality.
- the communication device 2 is disconnected from the 5G wireless communication network 11 due to the priority communication detected in S22 (S27) and/or the communication device 2 is connected to the 4G wireless communication network 12.
- the notification unit 34 implemented in the 4G wireless communication network 12 notifies the 5G wireless communication network 11 of (S25).
- the disconnecting unit 35 disconnects the communication device 2 from the 5G wireless communication network 11 after the notification in S26.
- the operation system (OPS) of the 5G wireless communication network 11 or the wireless communication system 1 that has received the notification from the 4G wireless communication network 12 in S26 determines that the disconnection of the communication device 2 in S27 is caused by the priority communication detected in S22.
- connection of the communication device 2 to the 4G wireless communication network 12 by the connection unit 33 in S25 is the same as the connection of the communication device 2 from the 5G wireless communication network 11 by the disconnection unit 35 in S27. Done after cutting.
- the connection destination of the communication device 2 is determined according to the comparison result of the communication quality of the first wireless communication network (5G wireless communication network 11) and the second wireless communication network (4G wireless communication network 12) by the comparison unit 32.
- the first wireless communication network has been switched to the second wireless communication network
- the connection destination of the communication device 2 is changed to the first wireless communication network according to the detection of priority communication by the priority communication detection unit 31 without comparing the communication quality.
- a switch may be made from the communication network to the second wireless communication network. For example, when the communication device 2 connected to the 5G wireless communication network 11 starts priority communication, the connection destination may be switched immediately to perform priority communication on the 4G wireless communication network 12 .
- each device described in the embodiments can be realized by hardware resources or software resources, or by cooperation between hardware resources and software resources.
- Processors, ROMs, RAMs, and other LSIs can be used as hardware resources.
- Programs such as operating systems and applications can be used as software resources.
- the present invention relates to wireless communication technology.
- 1 wireless communication system 2 communication device, 3 priority communication processing device, 11 5G wireless communication network, 12 4G wireless communication network, 31 priority communication detection unit, 32 comparison unit, 33 connection unit, 34 notification unit, 35 disconnection unit, 111 5G base station, 112 5G cells, 121 4G base station, 122 4G cells.
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Abstract
Description
Claims (15)
- 無線通信する通信機からの優先通信を検知する優先通信検知部と、
優先通信が検知された前記通信機を、接続中の第1無線通信ネットワークと異なる第2無線通信ネットワークに接続する接続部と、
前記通信機の前記第2無線通信ネットワークへの接続が、検知された優先通信に起因することを前記第1無線通信ネットワークに通知する通知部と、
を備える無線通信システム。 - 前記通知部は前記通信機に設けられる、請求項1に記載の無線通信システム。
- 前記通知部は前記第2無線通信ネットワークに設けられる、請求項1に記載の無線通信システム。
- 前記通知部が前記第1無線通信ネットワークへの通知を行った後に、前記通信機を前記第1無線通信ネットワークから切断する切断部を更に備える、請求項1から3のいずれかに記載の無線通信システム。
- 前記第1無線通信ネットワークは、前記切断部による前記通信機の切断に関する例外処理を省略する、請求項4に記載の無線通信システム。
- 前記接続部は、前記通信機が前記第1無線通信ネットワークから切断された後に、前記通信機を前記第2無線通信ネットワークに接続する、請求項4または5に記載の無線通信システム。
- 前記接続部は、前記通信機が前記第1無線通信ネットワークから切断される前に、前記通信機を前記第2無線通信ネットワークに接続する、請求項4または5に記載の無線通信システム。
- 前記第1無線通信ネットワークおよび前記第2無線通信ネットワークの通信品質を比較する比較部を更に備え、
前記接続部は、前記第2無線通信ネットワークの通信品質が前記第1無線通信ネットワークの通信品質より優れている場合、優先通信が検知された前記通信機を前記第2無線通信ネットワークに接続する、
請求項1から7のいずれかに記載の無線通信システム。 - 前記第1無線通信ネットワークおよび前記第2無線通信ネットワークは異なる無線アクセス技術を使用する、請求項1から8のいずれかに記載の無線通信システム。
- 前記無線アクセス技術はNRおよびLTEの少なくともいずれかを含む、請求項9に記載の無線通信システム。
- 前記第1無線通信ネットワークおよび前記第2無線通信ネットワークは異なるコアネットワークを使用する、請求項1から10のいずれかに記載の無線通信システム。
- 前記コアネットワークは5GCおよびEPCの少なくともいずれかを含む、請求項11に記載の無線通信システム。
- 前記優先通信は緊急通報用電話番号への電話を含む、請求項1から12のいずれかに記載の無線通信システム。
- 無線通信する通信機からの優先通信を検知する優先通信検知ステップと、
優先通信が検知された前記通信機を、接続中の第1無線通信ネットワークと異なる第2無線通信ネットワークに接続する接続ステップと、
前記通信機の前記第2無線通信ネットワークへの接続が、検知された優先通信に起因することを前記第1無線通信ネットワークに通知する通知ステップと、
を備える無線通信方法。 - 無線通信する通信機からの優先通信を検知する優先通信検知ステップと、
優先通信が検知された前記通信機を、接続中の第1無線通信ネットワークと異なる第2無線通信ネットワークに接続する接続ステップと、
前記通信機の前記第2無線通信ネットワークへの接続が、検知された優先通信に起因することを前記第1無線通信ネットワークに通知する通知ステップと、
をコンピュータに実行させる無線通信プログラム。
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KR1020237037495A KR20230165299A (ko) | 2021-03-31 | 2021-06-22 | 무선 통신 시스템, 무선 통신 방법, 무선 통신 프로그램 |
JP2023510177A JPWO2022208915A1 (ja) | 2021-03-31 | 2021-06-22 | |
EP21935075.8A EP4319472A1 (en) | 2021-03-31 | 2021-06-22 | Wireless communication terminal, wireless communication method, and wireless communication program |
CN202180096314.4A CN117063604A (zh) | 2021-03-31 | 2021-06-22 | 无线通信系统、无线通信方法、无线通信程序 |
US17/757,562 US20240163780A1 (en) | 2021-03-31 | 2021-06-22 | Connection and notification for priority communication |
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- 2021-06-22 EP EP21935075.8A patent/EP4319472A1/en active Pending
- 2021-06-22 WO PCT/JP2021/023558 patent/WO2022208915A1/ja active Application Filing
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US20240163780A1 (en) | 2024-05-16 |
KR20230165299A (ko) | 2023-12-05 |
CN117063604A (zh) | 2023-11-14 |
JPWO2022208915A1 (ja) | 2022-10-06 |
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