CN112189349B

CN112189349B - Wireless access network

Info

Publication number: CN112189349B
Application number: CN201880093708.2A
Authority: CN
Inventors: 安川真平; 工藤理一; 丸小伦己
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2023-06-27
Anticipated expiration: 2038-05-31
Also published as: CN112189349A; WO2019229940A1

Abstract

The radio access network (200) receives an uplink signal from the UE (100). A radio access network (200) acquires a UE identifier from the association of the transmission parameter of an uplink signal with the UE identifier, and determines cell information of a cell (203) that has received the uplink signal. The radio access network (200) transmits the UE device identifier and the cell information acquired by the radio access network (200) to the core network (300).

Description

Wireless access network

Technical Field

The present invention relates to a radio access network in an information distribution system for distributing information by using a mobile communication network.

Background

As a system for providing traffic information to vehicles, a vehicle information and communication system (Vehicle Information and Communication System) (VICS: registered trademark of the national institutes of road traffic information communication system center) is known. In VICS, traffic information is provided to a VICS-compliant terminal mounted on a vehicle by using a beacon (beacon) or FM multiplex broadcasting (FM multiplex broadcast).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2005-117398

Disclosure of Invention

On the other hand, the following system was studied: traffic information is distributed to a user device to be distributed, which is mounted on a vehicle, in a certain area (hereinafter referred to as a distribution area) by using a mobile communication network.

However, in the case where the user device is in an IDLE state (IDLE state), the mobile communication network can grasp the location of the user device only in units of location registration areas. Since the location registration area is set to a size of a plurality of cells in units of counties, the distribution area of traffic information is generally smaller than the location registration area.

Therefore, the mobile communication network cannot recognize whether the user device residing in the IDLE state (IDLE state) of the location registration area is in the distribution area of traffic information. In order to identify the location of the user equipment in more detail, the mobile communication network needs to set the user equipment in an IDLE state (IDLE state) residing in the location registration area to a CONNECTED state (CONNECTED state) to grasp the cell to which the user equipment belongs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a radio access network configured to grasp a location of a user device in units of a smaller area than a location registration area even when the user device is in an IDLE state (IDLE state), and to transmit a distribution message such as traffic information to a user device to be distributed, which resides in a distribution area.

A radio access network (200) according to an embodiment of the present invention includes: a receiving unit (211) that receives an uplink signal from a user device (100); a control unit (215) that acquires a user device identifier and cell information specifying a cell that has received the uplink signal, based on the association between the transmission parameter of the uplink signal and the user device identifier; and a transmitting unit (213) that transmits the user device identifier and the cell information acquired by the control unit (215) to a core network (300).

Effects of the invention

Even if the user device is in an IDLE state (IDLE state), the mobile communication network can grasp the location of the user device in units of a smaller area than the location registration area and transmit a distribution message such as traffic information to the user device as a distribution target residing in the distribution area.

Drawings

Fig. 1 is a schematic overall configuration diagram of an information distribution system 10.

Fig. 2 is a functional block diagram of a radio access network 200.

Fig. 3 is a diagram showing association of a UE identifier with transmission parameters.

Fig. 4 is a diagram showing association of region information, a UE identifier, and transmission parameters.

Fig. 5 is a diagram illustrating an uplink signal including a UE identifier.

Fig. 6 is a functional block configuration diagram of the core network 300.

Fig. 7 is a diagram showing a flow of information acquisition processing performed by the radio access network 200.

Fig. 8 is a diagram showing a position determination processing sequence of the UE100 (operation example 1).

Fig. 9 is a diagram showing a position determination processing sequence of the UE100 (operation example 2).

Fig. 10 is a diagram showing a position determination processing sequence of the UE100 (operation example 3).

Fig. 11 is a diagram showing a position determination processing sequence of the UE100 (operation example 4).

Fig. 12 is a diagram showing a modification of the position determination processing sequence of the UE100 (operation example 1).

Fig. 13 is a diagram showing a modification of the position determination processing sequence of the UE100 (operation example 2).

Fig. 14 is a diagram showing a modification of the position determination processing sequence of the UE100 (operation example 3).

Fig. 15 is a diagram showing a modification of the position determination processing sequence of the UE100 (operation example 4).

Fig. 16 is a diagram showing information distribution processing timing.

Fig. 17 is a diagram showing the association of the distribution area with the cell.

Fig. 18 is a diagram showing a modification of the information distribution processing sequence.

Fig. 19 is a diagram showing an example of a hardware configuration of the radio access network 200 and the core network 300.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. The same or similar functions and structures are denoted by the same reference numerals, and description thereof is omitted as appropriate.

(1) Overall outline structure of information distribution system

Fig. 1 is a schematic overall configuration of an information distribution system 10 according to the embodiment. The information distribution system 10 includes a wireless communication system 20, an external network 30, and a distribution server 40.

The Radio communication system 20 is a mobile communication system according to a New Radio (NR: new air interface) defined as 5G, and includes a user equipment 100 (hereinafter referred to as UE 100), a Radio access network 200, and a core network 300. The wireless communication system 20 may be a mobile communication system according to long term evolution (Long Term Evolution (LTE)). The wireless communication system 20 is connected to the distribution server 40 via the external network 30.

The distribution server 40 is a traffic information distribution server that distributes traffic information such as congestion information, accident information, and safe operation auxiliary information. The distribution server 40 transmits a distribution message to the UE100 as a distribution object residing in the distribution area by using the wireless communication system 20. The distribution server 40 may be directly connected to the core network 300.

The UE100 is a UE mounted on a vehicle or a UE of a user who sits on the vehicle. Wireless communication according to NR specified as 5G is performed between the UE100 and the radio access network 200 and the core network 300. In addition, in the case where the wireless communication system 20 is a mobile communication system according to LTE, wireless communication according to LTE is performed between the UE100 and the radio access network 200 and the core network 300. The UE100 resides in a distribution area and receives a distribution message from the distribution server 40 by accessing the radio access network 200.

The radio access network 200 is an NG-RAN specified as 5G, and is configured by a radio access network device 201 (for example, a gNB) that performs radio communication with the UE100, and the like. In addition, in the case where the wireless communication system 20 is a mobile communication system according to LTE, the radio access network 200 is an evolved universal radio access network (Evolved Universal Terrestrial Radio Access Network (E-UTRAN)) defined in 3 GPP. In this case, the radio access network 200 is constituted by a radio access network device (e.g., eNodeB) or the like that performs radio communication with the UE 100. The radio access network device 201 forms 1 or more cells 203. In fig. 1, only a radio access network device 201 is shown, but a radio access network 200 includes a plurality of radio access network devices, each of which forms 1 or more cells. The radio access network 200 is connected to the core network 300.

The core network 300 is connected to the distribution server 40 via the external network 30. The core network 300 is a core network defined as 5G, and is constituted by a core network device 301 and the like. The core network device 301 is separated into a U-plane function group and a C-plane function group, for example, and is composed of a plurality of nodes. The U-plane functionality has user plane functionality (User Plane Function (UPF)) providing functionality dedicated to U-plane processing. The C-plane function group is separated into access and mobility management functions (Access and Mobility management Function (AMF)), session management functions (Session Management Function (SMF)). AMF carries out mobility management, SMF carries out session management. Further, the C-plane function group has unified data management (Unified Data Management (UDM)), an authentication server function (Authentication Sever Function (AUSF)), a policy control function (Policy Control Function (PCF)), and the like. The UDM holds subscriber information and manages subscription information, authentication information, and belonging information of a user. The AUSF performs authentication processing. The PCF performs quality of service (Quality of Service (QoS)) and charging control for user data forwarding.

In addition, in the case where the wireless communication system 20 is a mobile communication system according to LTE, the core network 300 is an evolved packet core (Evolved Packet Core (EPC)) defined in 3 GPP. In this case, the core network device 301 is configured by a plurality of nodes such as a mobility management entity (Mobility Management Entity (MME)), a Serving Gateway (S-GW), a packet data network Gateway (Packet Data Network Gateway (P-GW)), a home subscriber server (Home Subscriber Server (HSS)), and a policy and charging rule function (Policy and Charging Rules Function (PCRF)). The MME performs mobility management and session management. And the S-GW forwards the user data. The P-GW allocates an IP address, forwards packets to the S-GW, and the like. The HSS holds subscriber information and manages subscription information, authentication information, and belonging information of the user. The PCRF performs QoS and charging control for user data forwarding.

(2) Functional block structure of information release system

Next, a functional block configuration of the information distribution system 10 will be described. Specifically, the functional block structure of the radio access network 200 and the functional block structure of the core network 300 are described. The hardware structure of the radio access network 200 and the core network 300 will be described later.

In addition, each function of the radio access network 200 is realized by a device or a combination of a plurality of devices within the radio access network 200. Likewise, the functions of the core network 300 are performed by devices or a combination of devices within the core network 300.

In the following, only the portions related to the features in the present embodiment will be described. Thus, the network has of course other functional blocks not directly associated with the features in this embodiment.

(2.1) radio access network 200

Fig. 2 is a functional block diagram of a radio access network 200. As shown in fig. 2, the radio access network 200 includes a receiving unit 211, a transmitting unit 213, and a control unit 215. The reception unit 211 receives an uplink signal from the UE 100. The control unit 215 acquires the UE identifier and cell information specifying the cell 203 that received the uplink signal, based on the association between the transmission parameter of the uplink signal and the UE identifier. The transmitting unit 213 transmits the UE identifier acquired by the control unit 215 and the cell information to the core network 300.

Here, the uplink signal is a random access preamble, and the transmission parameter includes at least any one of time and frequency resources allocated to transmission of the random access preamble and a random access preamble sequence for transmission of the random access preamble.

The receiving unit 211, the transmitting unit 213, and the control unit 215 operate as follows: that is, (1) the control unit 215 detects the reception level of the uplink signal received by the reception unit 211, and the transmission unit 213 transmits the reception level detected by the control unit 215 to the core network 300; (2) The reception unit 211 receives the uplink signal to be monitored from the core network 300, and the control unit 215 receives the uplink signal to be monitored from the UE100 through the reception unit 211 according to the configuration; (3) The reception unit 211 receives, from the core network 300, the association between the UE identifier and the transmission parameter set for each predetermined area, and the control unit 215 acquires the UE identifier based on the association from the area where the cell 203 that has received the uplink signal is located.

As shown in fig. 2, the receiving unit 211 and the transmitting unit 213 are configured by a wireless communication unit 220. The control unit 215 is configured by a storage unit 230, a signal processing unit 240, a cell processing unit 250, and an information processing unit 260.

The wireless communication unit 220 performs wireless communication according to NR specified as 5G. Specifically, the radio communication unit 220 transmits or receives radio signals according to NR to or from the UE100 and the core network 300. In addition, in the case where the wireless communication system 20 is a mobile communication system according to LTE, the wireless communication unit 220 performs wireless communication according to LTE. The storage section 230 stores various information.

When the association between the UE identifier and the transmission parameter, which will be described later, is shared between the radio access network 200 and the UE100, the storage unit 230 stores the association. Fig. 3 shows the association of a UE identifier with a transmission parameter.

The UE identifier is generated based on an international mobile subscriber identity (International Mobile Subscriber Identity (IMSI)) which is a unique number assigned to the UE 100. The IMSI is stored in a SIM card or the like of the UE100 at the time of shipment of the UE. Since the UE identifier is generated based on the IMSI, it is an identifier inherent to the UE 100. The transmission parameters are radio resources (time and frequency resources) and signal sequences for transmitting an uplink signal capable of identifying a UE identifier, which ensure the UE100 in an IDLE state (IDLE state). The transmission parameter is any one of radio resources and signal sequences.

For example, when the uplink signal capable of recognizing the UE identifier is a random access preamble, the radio resource is a physical random access channel (Physical Random Access Channel (PRACH)) resource, and the signal sequence is a random access preamble sequence. The uplink signal that can identify the UE identifier may be a reference signal such as a demodulation reference signal (Demodulation Reference Signal (DM-RS)). In fig. 3, for the UE identifier 001, there are associated time and frequency resources (t ₀₀₁ ,f ₀₀₁ ) Signal sequence S ₀₀₁ . Similarly, for the UE identifier 002, a time and frequency resource (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ For the UE identifier 003, there are associated time and frequency resources (t ₀₀₃ ,f ₀₀₃ ) Signal sequence S ₀₀₃ 。

In addition, when a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is shared between the radio access network 200 and the UE100, the storage section 230 may store the function or the generation rule as an association of the UE identifier with the transmission parameter, instead of the list form shown in fig. 3.

When the uplink signal capable of identifying the UE identifier is a random access preamble, the transmission of the conventional random access preamble is prioritized when the transmission timing of the random access preamble capable of identifying the UE identifier overlaps with the transmission timing of the conventional random access preamble. Instead, the random access preamble capable of identifying the UE identifier may be transmitted by a process (process) separate from the conventional random access channel. Specifically, the radio access network 200 sets dedicated radio resources to distinguish a random access channel for transmitting a random access preamble capable of identifying a UE identifier from a conventional random access channel.

The UE100 may not monitor a random access response (response) after transmitting the random access preamble capable of identifying the UE identifier. On the other hand, when the UE100 monitors the random access response, the radio access network 200 includes the acquired UE identifier in a reservation bit (reserved bit of the MAC header) or the like of the random access response. When the UE100 receives the random access response from the radio access network 200, it is determined whether or not the UE identifier included in the random access response coincides with the UE identifier of the UE 100. When the UE identifier included in the random access response coincides with the UE identifier of the UE100, the UE100 determines that the random access response is detected. On the other hand, when the UE identifier included in the random access response does not coincide with the UE identifier of the UE100 or when the random access response is not detected within a predetermined period, a random access preamble capable of identifying the UE identifier is transmitted to the radio access network 200 through the next transmission opportunity.

When the radio access network 200 receives a structure to be monitored, which will be described later, from the core network 300, the storage unit 230 stores the structure. The structure to be monitored indicates a structure of an uplink signal that the radio access network 200 should monitor and that can identify the UE identifier. Specifically, the structure to be monitored indicates a structure of radio resources (time and frequency resources) to be actually monitored by the radio access network 200 among radio resources (time and frequency resources) for transmitting an uplink signal for which a UE identifier can be identified in the UE100 in an IDLE state (IDLE state). The core network 300 can designate a configuration of radio resources to be actually monitored to the radio access network 200 in advance using the configuration to be monitored.

When the radio access network 200 and the UE100 share the area setting information described later, the storage unit 230 stores the area setting information. Fig. 4 shows association of the region information and the UE identifier in the region setting information, and transmission parameters. The area setting information shows, for example, association of a UE identifier and a transmission parameter, which is set in units of cells, in units of a cell group constituted by a plurality of cells, in units of a location registration area, or in units of a predetermined area defined in terms of longitude and latitude. In the region setting information, transmission parameters associated with the UE identifier within the same region are different between UE identifiers. In addition, between different regions, the transmission parameters associated with the UE identifier of one region may be associated with the UE identifier of another region.

Specifically, as shown in FIG. 4, in the Area ₁ In which time and frequency resources (t ₀₀₁ ,f ₀₀₁ ) Signal sequence S ₀₀₁ . Similarly, in the Area ₁ In which time and frequency resources (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ For the UE identifier 003, there are associated time and frequency resources (t ₀₀₃ ,f ₀₀₃ ) Signal sequence S ₀₀₃ . In addition, in the Area ₂ In the above, for the UE identifier 011, time and frequency resources (t ₀₀₁ ,f ₀₀₁ ) Signal sequence S ₀₀₁ . Similarly, in the Area ₂ In this, a time and frequency resource (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ For UE identifier 013, there are associated time and frequency resources (t ₀₀₃ ,f ₀₀₃ ) Signal sequence S ₀₀₃ . Thereby, in the Area ₁ Or Area ₂ In, the transmission parameters associated with the UE identifiers differ between UE identifiers. On the other hand, with region Area ₁ Time and frequency resources (t ₀₀₁ ,f ₀₀₁ ) Signal sequence S ₀₀₁ Also with the Area ₂ Is associated with the UE identifier 011.

In addition, when a function or a generation rule associating a UE identifier with a transmission parameter in a one-to-one relationship is shared between the radio access network 200 and the UE100, the storage section 230 may store the function or the generation rule as an association of the UE identifier with the transmission parameter per each set area, instead of the table form shown in fig. 4.

As described below, the signal processing unit 240 secures one of radio resources (time and frequency resources) for transmitting an uplink signal capable of identifying a UE identifier in the cell 203, and receives the uplink signal via the radio communication unit 220. When the storage unit 230 stores the monitoring target structure, the signal processing unit 240 refers to the monitoring target structure, determines a radio resource to be actually monitored among radio resources (time and frequency resources) for transmitting an uplink signal for which the UE identifier can be identified, and monitors reception of the uplink signal.

Upon receiving the uplink signal, the signal processing unit 240 obtains a transmission parameter of the uplink signal from a radio resource for transmission of the uplink signal. When the signal processing unit 240 acquires the transmission parameter, it refers to the association stored in the storage unit 230 and acquires the UE identifier associated with the transmission parameter. When the storage unit 230 stores a function or a generation rule that associates the UE identifier with the transmission parameter in a one-to-one relationship, the signal processing unit 240 applies the function or the generation rule to the acquired transmission parameter, and acquires the UE identifier.

For example, when the association of fig. 3 is stored in the storage unit 230, the signal processing unit 240 obtains the time and frequency resources (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ When the transmission parameter is set, the correlation with the time and frequency resource (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ An associated UE identifier 002.

When the storage unit 230 stores the area setting information, the signal processing unit 240 specifies an area in which the cell 203 is located, out of the areas set by the area setting information, using the cell ID of the cell 203, the cell group ID including the cell group of the cell 203, or the location registration area ID including the location registration area of the cell 203, and refers to the association between the UE identifier and the transmission parameter in the specified area. When the area setting information indicates association of the UE identifier with the transmission parameter in units of a predetermined area defined by longitude and latitude, the signal processing section 240 determines an area in which the cell 203 is located, of the areas set by the area setting information, using longitude and latitude of a place in which the cell 203 is located, which receives the uplink signal, and refers to association of the UE identifier in the determined area with the transmission parameter.

For example, when the association of fig. 4 is stored in the storage unit 230, the signal processing unit 240 obtains the time and frequency resources (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ As a transmission parameter, and as an Area where the cell 203 is located, an Area is determined ₁ Referring to the association of FIG. 4, in the Area ₁ In the association between the UE identifier and the transmission parameter, the time and frequency resources (t ₀₀₂ ,f ₀₀₂ ) Signal sequence S ₀₀₂ An associated UE identifier 002.

When the UE identifier is acquired, the signal processing unit 240 transmits the acquired UE identifier to the information processing unit 260. In addition, when the association between the UE identifier and the transmission parameter is not stored in the storage unit 230, the signal processing unit 240 transmits the acquired transmission parameter to the information processing unit 260.

As shown in fig. 5, when the uplink signal capable of identifying the UE identifier includes a UE identifier field (field) F2 in addition to the signal sequence field F1, the signal processing unit 240 may directly acquire the UE identifier set in the UE identifier field F2 from the uplink signal. In this case, the signal processing unit 240 may not acquire the UE identifier from the uplink signal, but may directly transmit the content of the UE identifier field F2 in the uplink signal to the information processing unit 260.

When the signal processing unit 240 receives an uplink signal capable of identifying the UE identifier, it can acquire the reception level of the uplink signal and transmit the acquired reception level to the information processing unit 260.

As described below, when the cell processing unit 250 is notified of "in the cell 203, by securing one of radio resources (time and frequency resources) for transmitting an uplink signal capable of identifying a UE identifier, and receiving an uplink signal via the radio communication unit 220", the cell processing unit 240 acquires cell information of the cell 203 which determines to receive the uplink signal. When acquiring the cell information, the cell processing unit 250 transmits the acquired cell information to the information processing unit 260.

When the information processing section 260 receives the UE identifier from the signal processing section 240 and the cell information from the cell processing section 250, the UE identifier is associated with the cell information and transmitted to the core network 300. When the information processing section 260 receives the transmission parameter from the signal processing section 240 in place of the UE identifier, the transmission parameter is associated with the cell information and transmitted to the core network 300. When the information processing section 260 receives the content of the UE identifier field F2 from the signal processing section 240 in place of the UE identifier, the content of the UE identifier field F2 is associated with the cell information and transmitted to the core network 300. When the information processing section 260 receives the UE identifier and the reception level from the signal processing section 240 and the cell information from the cell processing section 250, the UE identifier, the reception level, and the cell information are associated and transmitted to the core network 300.

(2.2) core network 300

Fig. 6 is a functional block configuration diagram of the core network device 301. As shown in fig. 6, the core network device 301 includes a receiving unit 311, a transmitting unit 313, and a control unit 315. Specifically, the receiving unit 311 and the transmitting unit 313 are configured by the session communication unit 320 and the network communication unit 330. The control unit 315 includes a storage unit 340, a setting unit 350, a signal processing unit 360, and an information processing unit 370.

The session communication unit 320 performs wireless communication according to NR specified as 5G. Specifically, the session communication unit 320 transmits or receives a radio signal according to NR between the UE100 and the radio access network 200. The session communication section 320 establishes a session required for communication with the UE100 via the wireless access network 200, and performs communication via the session. In addition, in the case where the wireless communication system 20 is a mobile communication system according to LTE, the session communication unit 320 performs wireless communication according to LTE.

The network communication unit 330 performs wireless communication according to NR specified as 5G. Specifically, the network communication unit 330 transmits or receives a wireless signal according to NR to the external network 30. In addition, when the wireless communication system 20 is a mobile communication system according to LTE, the network communication unit 330 performs wireless communication according to LTE.

The storage unit 340 stores various information. The storage unit 340 stores the UE100 that has a possibility of issuing traffic information in advance as order information. When the association of the UE identifier and the transmission parameter is shared between the core network 300 and the UE100, the storage 340 stores the association. In addition, when a function or a generation rule associating a UE identifier with a transmission parameter in a one-to-one relationship is shared between the core network 300 and the UE100, the storage section 340 may store the function or the generation rule as an association of the UE identifier with the transmission parameter instead of the list form shown in fig. 3.

When the core network 300 sets the UE identifier, the setting unit 350 refers to the subscription information stored in the storage unit 340, recognizes the IMSI of the UE100, and sets the UE identifier based on the IMSI. The setting unit 350 notifies the UE100 of the set UE identifier in advance via the session communication unit 320. In addition, instead of setting the UE identifier based on the IMSI, the setting unit 350 may temporarily set the UE identifier having the unique value to the UE100 and notify the UE100 of the set UE identifier in advance.

When the core network 300 sets the structure to be monitored, the setting unit 350 sets the structure of the uplink signal that the radio access network 200 should monitor and that can identify the UE identifier. Specifically, the configuration of the radio resources (time and frequency resources) for ensuring transmission of the uplink signal capable of identifying the UE identifier in the UE100 in the IDLE state (IDLE state) is set as the configuration of the radio resources to be actually monitored by the radio access network 200. The setting unit 350 transmits the set monitoring target configuration to the radio access network 200 via the session communication unit 320.

When the core network 300 sets the region setting information, the setting unit 350 associates the region information, the UE identifier, and the transmission parameter, and sets the region setting information. Specifically, the association between the UE identifier and the transmission parameter is set in the area setting information, for example, in units of cells, in units of cell groups composed of a plurality of cells, in units of location registration areas, or in units of predetermined areas defined by longitude and latitude. The setting unit 350 transmits the set area setting information to the UE100 and the radio access network 200 or to the UE100 via the session communication unit 320. In addition, when a function or a generation rule associating a UE identifier with a transmission parameter in a one-to-one relationship is shared between the core network 300 and the UE100, the setting section 350 sets the function or the generation rule as an association of the UE identifier with the transmission parameter per set area, instead of the list form shown in fig. 4.

When the signal processing unit 360 receives the association between the transmission parameter of the uplink signal capable of identifying the UE identifier and the cell information from the radio access network 200 via the session communication unit 320, the association stored in the storage unit 340 is referred to, and the UE identifier associated with the transmission parameter is acquired. In addition, when a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is stored in the storage unit 340, the signal processing unit 360 applies the function or the generation rule to the acquired transmission parameter, and acquires the UE identifier.

When the storage 340 stores the area setting information, the signal processing unit 360 determines an area in which the cell 203 is located, out of the areas set by the area setting information, using the cell ID of the cell 203, the cell group ID of the cell group including the cell 203, or the location registration area ID including the location registration area of the cell 203 included in the cell information received from the radio access network 200, and refers to the association of the UE identifier and the transmission parameter in the determined area. In the case where the area setting information indicates association of the UE identifier and the transmission parameter in units of a predetermined area defined by longitude and latitude, the signal processing section 360 uses the longitude and latitude of the location where the uplink signal cell 203 is received to determine an area where the cell 203 is located among the areas set by the area setting information, and refers to association of the UE identifier and the transmission parameter in the determined area.

When the signal processing unit 360 receives the association between the content of the UE identifier field F2 and the cell information from the radio access network 200 via the session communication unit 320, it acquires the UE identifier from the UE identifier field F2. When the signal processing unit 360 acquires the UE identifier, the information processing unit 370 is sent the association between the acquired UE identifier and the cell information.

When the information processing unit 370 receives the association between the UE identifier and the cell information from the radio access network 200 via the session communication unit 320, the location of the UE100 in the IDLE state (IDLE state) in units of cells is determined based on the association. That is, the information processing unit 370 recognizes that the UE100 in the IDLE state (IDLE state) is camping on the cell 203. When the information processing unit 370 receives the association between the UE identifier and the cell information from the signal processing unit 360, the position of the UE100 in the IDLE state (IDLE state) in units of cells is determined based on the association similarly. The information processing unit 370 stores the determined position of the UE100 in the IDLE state (IDLE state) in the storage unit 340.

When the information processing unit 370 receives the association of the UE identifier, the reception level, and the cell information from the radio access network 200 via the session communication unit 320, the location of the UE100 in the IDLE state (IDLE state) in units of cells is determined based on the association. That is, the information processing unit 370 grasps that the UE100 in the IDLE state (IDLE state) is camping on the cell 203. The information processing unit 370 stores the determined position of the UE100 in the IDLE state (IDLE state) in the storage unit 340. Further, when the information processing unit 370 recognizes that the same UE identifier is associated with a plurality of cell information based on the association, it determines the reception level in each cell. This enables the location of the UE100 in the IDLE state (IDLE state) to be grasped in more detail.

For example, when the information processing unit 370 recognizes that the same UE identifier is acquired in 2 cells, if the reception levels in the 2 cells are substantially the same, it can be estimated that the UE100 in the IDLE state (IDLE state) is located at the center of the area where the 2 cells overlap. When the information processing unit 370 recognizes that the same UE identifier is acquired in 2 cells, if the reception level in one cell is higher than the reception level in the other cell, it can be estimated that the UE100 in the IDLE state (IDLE state) is located on the one cell side in the area where 2 cells overlap. In addition, if the information processing unit 370 can recognize that the same UE identifier is acquired in a plurality of cells, the position of the UE100 in the IDLE state (IDLE state) can be estimated by the three-point measurement.

(3) Action of information distribution system

Next, the operation of the information distribution system 10 will be described. The processing of the radio access network 200 is performed by a device or a combination of a plurality of devices in the radio access network 200. Likewise, the processing of the core network 300 is performed by a device or a combination of devices within the core network 300.

(3.1) information acquisition processing

Fig. 7 shows a flow of information acquisition processing performed by the radio access network 200. As shown in fig. 7, the radio access network 200 secures one resource (time and frequency resource) of radio resources (time and frequency resources) for transmitting an uplink signal of a UE identifier in the cell 203, and receives the uplink signal via the radio communication unit 220 (S10). When the radio access network 200 stores the structure to be monitored, the radio access network refers to the structure to be monitored, identifies the radio resource to be actually monitored among the radio resources (time and frequency resources) for transmitting the uplink signal for which the UE identifier can be identified, and receives the uplink signal.

When the radio access network 200 receives the uplink signal, a transmission parameter of the uplink signal is acquired based on a radio resource for transmission of the uplink signal (S20). When the radio access network 200 acquires the transmission parameter, the UE identifier associated with the transmission parameter is acquired with reference to the association between the UE identifier and the transmission parameter (S30).

When a function or a generation rule is stored in which the UE identifier and the transmission parameter are associated in a one-to-one relationship, the radio access network 200 applies the function or the generation rule to the acquired transmission parameter, and acquires the UE identifier. When the area setting information is stored, the radio access network 200 specifies an area in which the cell 203 is located in the area set by the area setting information using the cell ID of the cell 203, the cell group ID of the cell group including the cell 203, the location registration area ID of the location registration area including the cell 203, or the longitude and latitude of the location where the cell 203 is located, and obtains the UE identifier associated with the transmission parameter by referring to the association between the UE identifier in the specified area and the transmission parameter.

The radio access network 200 acquires cell information specifying the cell 203 that received the uplink signal (S40). The processing in S40 is not limited to the processing in S20 and S30, and may be performed before the processing in S20 and S30 or simultaneously with the processing in S20 and S30.

The radio access network 200 associates the acquired UE identifier with the cell information and reports the UE identifier as acquired information to the core network 300 (S50). When the radio access network 200 receives the uplink signal in S20, it may acquire the reception level of the uplink signal, and in S50, the acquired UE identifier, reception level, and cell information may be associated with each other and reported to the core network 300 as acquisition information.

(3.1.1) working example 1

Fig. 8 shows a position determination processing sequence of the UE100 according to operation example 1. In this operation example, the association between the UE identifier and the transmission parameter is shared in advance between the radio access network 200 and the UE 100. In addition, the radio access network 200 may share a function or a generation rule for associating the UE identifier with the transmission parameter in a one-to-one relationship with the UE100 in advance.

The UE100 generates a UE identifier based on the IMSI, which is an inherent number inherently allocated to the UE100 (S100). Instead of generating the UE identifier by itself, the UE100 may also receive a UE identifier set according to the IMSI of the UE100 or a UE identifier having a fixed value in the UE100 from the core network 300.

The UE100 refers to the association of the UE identifier with the transmission parameter to determine the transmission parameter associated with the UE identifier of the UE100 (S110). In addition, when a function or a generation rule for associating the UE identifier with the transmission parameter in a one-to-one relationship is shared in advance between the radio access network and 200UE100, the function or the generation rule is applied to the UE identifier of the UE100 to generate the transmission parameter associated with the UE identifier in a one-to-one relationship.

The UE100 determines a transmission condition at a predetermined timing (S120). Specifically, the UE100 that has transitioned to the IDLE state (IDLE state) determines whether or not there is a transmission opportunity based on the time resource for transmitting the uplink signal that ensures that the UE identifier can be identified, among the determined transmission parameters. As the transmission conditions, the following conditions may be added. The UE100 or the distribution server 40 requests a transmission permission of an uplink signal capable of identifying the UE identifier to the core network 300, and the UE100 acquires the transmission permission from the core network 300 in advance. Then, in the process of S120, the UE100 determines whether or not a transmission permission of an uplink signal capable of identifying the UE identifier is acquired.

Here, synchronization between the UE100 in an IDLE state (IDLE state) and the radio access network 200 when transmitting an uplink signal capable of identifying the UE identifier is established using a global navigation satellite system (Global Navigation Satellite System, hereinafter, referred to as GNSS) time. For example, when the uplink signal capable of recognizing the UE identifier is a random access preamble, the UE100 in an IDLE state (IDLE state) transmits the random access preamble at a time after shifting the timing of transmitting the random access preamble from a predetermined time by a predetermined time using the GNSS time.

Instead of GNSS time, synchronization between the UE100 in an IDLE state (IDLE state) and the radio access network 200 may also be established using the reception timing of the downlink signal transmitted from the radio access network 200. Specifically, the UE100 in the IDLE state (IDLE state) establishes synchronization with the radio access network 200 in match with the time when the system frame number (System Frame Number (SFN)) broadcasted from the radio access network 200 is received. That is, when the UE100 in the IDLE state (IDLE state) receives a synchronization signal from the radio access network 200 and satisfies a transmission condition, an uplink signal capable of recognizing a UE identifier is transmitted to the radio access network 200.

When the transmission condition is satisfied, the UE100 transmits an uplink signal capable of identifying a UE identifier to the radio access network 200 (S130).

When the radio access network 200 receives an uplink signal capable of identifying the UE identifier from the UE100, it acquires transmission parameters of the uplink signal from radio resources for transmission of the uplink signal (S140). When the radio access network 200 acquires the transmission parameter, the UE identifier associated with the transmission parameter is acquired with reference to the association between the UE identifier and the transmission parameter (S150). In addition, when a function or a generation rule is stored in which the UE identifier and the transmission parameter are associated in a one-to-one relationship, the radio access network 200 applies the function or the generation rule to the acquired transmission parameter, and acquires the UE identifier.

The radio access network 200 acquires cell information specifying the cell 203 that received the uplink signal capable of identifying the UE identifier (S160). The processing in S160 is not limited to being performed after the processing in S140 and S150, and may be performed before the processing in S140 and S150 or simultaneously with the processing in S140 and S150. The radio access network 200 associates the acquired UE identifier with the cell information and reports the UE identifier to the core network 300 as acquired information (S170).

When the core network 300 acquires acquisition information from the radio access network 200, the location of the UE100 in an IDLE state (IDLE state) in units of cells is determined based on the acquisition information (S180). That is, the core network 300 recognizes that the UE100 in an IDLE state (IDLE state) camps on the cell 203. The core network 300 stores the determined location of the UE100 in the IDLE state (IDLE state).

(3.1.2) working example 2

Fig. 9 shows a position determination processing sequence of the UE100 according to the operation example 2. In this operation example, the radio access network 200 obtains a reception level of an uplink signal capable of identifying a UE identifier in addition to operation example 1. The processing of S200 to S250 in fig. 9 is the same as the processing of S100 to S150 in fig. 8, and therefore, the description thereof is omitted.

The radio access network 200 acquires a reception level of an uplink signal capable of identifying a UE identifier (S260). The processing in S260 is not limited to the processing in S240 and S250, and may be performed before the processing in S240 and S250 or simultaneously with the processing in S240 and S250.

The radio access network 200 acquires cell information specifying the cell 203 that received the uplink signal capable of identifying the UE identifier (S270). The processing in S270 is not limited to being performed after the processing in S240 and S250 and the processing in S260, and may be performed before the processing in S240 and S250 and the processing in S260, between the processing in S240 and S250 and the processing in S260, or simultaneously with the processing in S240 and S250 and the processing in S260. The radio access network 200 associates the acquired UE identifier, reception level, and cell information, and reports the same to the core network 300 as acquired information (S280).

When the core network 300 acquires acquisition information from the radio access network 200, the location of the UE100 in an IDLE state (IDLE state) in units of cells is determined based on the acquisition information (S290). That is, the core network 300 recognizes that the UE100 in an IDLE state (IDLE state) camps on the cell 203. When the core network 300 recognizes that the same UE identifier is associated with a plurality of pieces of cell information from the acquired information, it determines the reception level in each cell. This enables the location of the UE100 in the IDLE state (IDLE state) to be grasped in more detail. The core network 300 stores the determined location of the UE100 in the IDLE state (IDLE state).

(3.1.3) working example 3

Fig. 10 shows a position determination processing sequence of the UE100 according to operation example 3. In this operation example, the core network 300 sets a monitoring target configuration and notifies the radio access network 200 of the monitoring target configuration in addition to operation example 1. The processing of S320 to S350 in fig. 10 is the same as the processing of S100 to S130 in fig. 8, and the processing of S370 to S400 in fig. 10 is the same as the processing of S150 to S180 in fig. 8, and therefore, the description thereof is omitted.

The core network 300 sets the structure of an uplink signal that can identify the UE identifier to be monitored by the radio access network 200 as a monitored structure (S300). Specifically, the core network 300 sets the configuration of radio resources (time and frequency resources) for ensuring transmission of an uplink signal capable of identifying a UE identifier, among radio resources (time and frequency resources) for the UE100 in an IDLE state (IDLE state), which the radio access network 200 is to actually monitor, as a monitoring target configuration. The core network 300 transmits the monitoring target structure to the radio access network 200 (S310).

The radio access network 200 refers to the structure to be monitored, identifies the radio resource to be actually monitored among the radio resources (time and frequency resources) for transmitting the uplink signal for which the UE identifier can be identified, and monitors the reception of the uplink signal. When the radio access network 200 receives an uplink signal reception capable of identifying the UE identifier from the UE100, it acquires the transmission parameter of the uplink signal from the radio resource for transmission of the uplink signal (S360).

(3.1.4) working example 4

Fig. 11 shows a position determination processing sequence of the UE100 according to operation example 4. In this operation example, the core network 300 sets area setting information in addition to operation example 1, and notifies the UE100 and the radio access network 200 of the area setting information. The processing of S530, S550 to S570, and S590 to S610 in fig. 11 is the same as the processing of S100, S120 to S140, and S160 to S180 in fig. 8, and therefore, the description thereof is omitted.

The core network 300 associates the area information, the UE identifier, and the transmission parameter to set the area setting information (S500). Specifically, the core network 300 sets the area setting information by associating the UE identifier with the transmission parameter, for example, in units of cells, in units of cell groups composed of a plurality of cells, in units of location registration areas, or in units of predetermined areas defined by longitude and latitude. In addition, the core network 300 may set a function or a generation rule for associating the UE identifier with the transmission parameter in a one-to-one relationship for each region as the association of the UE identifier with the transmission parameter. The core network 300 transmits area setting information to the radio access network 200 and the UE100 (S510, S520).

The UE100 determines an area in which the UE100 is located using a cell ID of the cell 203, a cell group ID of a cell group including the cell 203, a location registration area ID of a location registration area including the cell 203, or a longitude and latitude of a place in which the cell 203 is located. The UE100 refers to the association of the UE identifier in the determined region with the transmission parameter to determine the transmission parameter associated with the UE identifier of the UE100 (S540). In addition, when a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is set for each region in the region setting information, the UE100 applies the function or the generation rule in the determined region to the UE identifier of the UE100 and generates the transmission parameter associated with the UE identifier in a one-to-one relationship.

In addition, the UE100 may determine an area in which the UE100 is located using a cell ID of a cell of a previously set frequency. Further, the core network device 301 may notify the UE100 of the cell ID of the cell 203, the cell group ID including the cell group of the cell 203, the location registration area ID including the location registration area of the cell 203, or the longitude and latitude of the place where the cell 203 is located, by broadcasting information.

When the radio access network 200 acquires the transmission parameters of the uplink signal capable of identifying the UE identifier, the area in which the radio access network 200 is located is determined using the cell ID of the cell 203, the cell group ID of the cell group including the cell 203, the location registration area ID of the location registration area including the cell 203, or the longitude and latitude of the place in which the cell 203 is located, which has received the uplink signal. The radio access network 200 refers to the association between the UE identifier in the determined region and the transmission parameter in the region setting information, and acquires the UE identifier associated with the transmission parameter (S580). In addition, when a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is set for each region in the region setting information, the radio access network 200 applies the function or the generation rule in the determined region to the acquired transmission parameter to acquire the UE identifier.

(3.2) modification of the information acquisition processing

Next, a modification of the operation related to the information acquisition process performed by the radio access network 200 will be described. In this modification, when the association between the UE identifier and the transmission parameter is stored in the core network 300 instead of the radio access network 200, or when the UE identifier is set in the UE identifier field F2 of the uplink signal capable of identifying the UE identifier shown in fig. 5, the processing of S30 in fig. 7 is omitted, and in S50, the radio access network 200 associates the transmission parameter with the cell information, or associates the content of the UE identifier field F2 with the cell information, and transmits the result to the core network 300.

(3.2.1) working example 1

Fig. 12 shows a modification of the location determination processing sequence of the UE100 according to operation example 1. In this operation example, the association between the UE identifier and the transmission parameter is shared in advance between the core network 300 and the UE 100. In addition, the core network 300 may share a function or a generation rule for associating the UE identifier with the transmission parameter in a one-to-one relationship with the UE100 in advance. The processing of S1000 to S1050 in fig. 12 is the same as the processing of S100 to S140 and the processing of S160 in fig. 8, and therefore, the description thereof is omitted.

The radio access network 200 associates the acquired transmission parameters with the cell information and reports the same to the core network 300 as acquired information (S1060). When the core network 300 acquires the acquisition information from the radio access network 200, the UE identifier associated with the acquired transmission parameter is acquired with reference to the association between the UE identifier and the transmission parameter (S1070). If a function or a generation rule is stored in which UE identifiers and transmission parameters are associated in a one-to-one relationship, the core network 300 applies the function or the generation rule to the acquired transmission parameters to acquire the UE identifiers.

When the UE identifier is set in the UE identifier field F2 of the uplink signal capable of identifying the UE identifier shown in fig. 5, the radio access network 200 associates the content of the acquired UE identification field F2 with the cell information and reports the content as acquisition information to the core network 300 (S1060). When acquiring the acquisition information from the radio access network 200, the core network 300 directly acquires the UE identifier from the content of the UE identification field F2 (S1070).

The core network 300 determines the location of the UE100 in the IDLE state (IDLE state) in units of cells based on the acquired UE identifier and cell information (S1080). That is, the core network 300 recognizes that the UE100 in an IDLE state (IDLE state) camps on the cell 203. The core network 300 stores the determined location of the UE100 in the IDLE state (IDLE state).

(3.2.2) working example 2

Fig. 13 shows a modification of the location determination processing sequence of the UE100 according to operation example 2. In this operation example, the radio access network 200 obtains a reception level of an uplink signal capable of identifying a UE identifier in addition to operation example 1. The processing of S1100 to S1140 of fig. 13 is the same as the processing of S1000 to S1040 of fig. 12, and therefore, the description thereof is omitted.

The radio access network 200 acquires a reception level of an uplink signal capable of identifying a UE identifier (S1150). The process of S1150 is not limited to being performed after the process of S1140, and may be performed before the process of S1140 or concurrently with the process of S1140.

The radio access network 200 acquires cell information specifying the cell 203 that received the uplink signal capable of identifying the UE identifier (S1160). The process of S1160 is not limited to being performed after the process of S1140 and the process of S1150, and may be performed before the process of S1140 and the process of S1150, between the process of S1140 and the process of S1150, or simultaneously with the process of S1140 and the process of S1150. The radio access network 200 associates the acquired transmission parameter, reception level, and cell information, and reports the same to the core network 300 as acquisition information (S1170).

When the core network 300 acquires the acquisition information from the radio access network 200, the UE identifier associated with the acquired transmission parameter is acquired with reference to the association between the UE identifier and the transmission parameter (S1180). If a function or a generation rule is stored in which UE identifiers and transmission parameters are associated in a one-to-one relationship, the core network 300 applies the function or the generation rule to the acquired transmission parameters to acquire the UE identifiers. The core network 300 determines the location of the UE100 in the IDLE state (IDLE state) in units of cells based on the acquired UE identifier and cell information (S1190). That is, the core network 300 recognizes that the UE100 in an IDLE state (IDLE state) camps on the cell 203. When the core network 300 recognizes that the same UE identifier is associated with a plurality of pieces of cell information from the acquired information, it determines the reception level in each cell. This enables the location of the UE100 in the IDLE state (IDLE state) to be grasped in more detail. The core network 300 stores the determined location of the UE100 in the IDLE state (IDLE state).

(3.2.3) working example 3

Fig. 14 shows a modification of the location determination processing sequence of the UE100 according to operation example 3. In this operation example, the core network 300 sets a monitoring target configuration and notifies the radio access network 200 of the monitoring target configuration in addition to operation example 1. The processing of S1220 to S1250 in fig. 14 is the same as the processing of S1000 to S1030 in fig. 12, and the processing of S1270 to S1300 in fig. 14 is the same as the processing of S1050 to S1080 in fig. 12, and therefore, the description thereof is omitted.

The core network 300 sets the structure of the uplink signal that can identify the UE identifier to be monitored by the radio access network 200 as a monitored structure (S1200). Specifically, the core network 300 sets the configuration of radio resources (time and frequency resources) for ensuring transmission of an uplink signal capable of identifying a UE identifier, among radio resources (time and frequency resources) for the UE100 in an IDLE state (IDLE state), which the radio access network 200 is to actually monitor, as a monitoring target configuration. The core network 300 transmits the monitoring target structure to the radio access network 200 (S1210).

The radio access network 200 refers to the structure to be monitored, identifies the radio resource to be actually monitored among the radio resources (time and frequency resources) for transmitting the uplink signal for which the UE identifier can be identified, and monitors the reception of the uplink signal. When the radio access network 200 receives an uplink signal from the UE100, which can identify the UE identifier, the transmission parameter of the uplink signal is acquired from the radio resource for transmission of the uplink signal (S1260).

(3.2.4) working example 4

Fig. 15 shows a modification of the location determination processing sequence of the UE100 according to operation example 4. In this operation example, the core network 300 sets region setting information and notifies the UE100 in addition to operation example 1. The processing of S1420, S1440 to S1480 in fig. 15 is the same as the processing of S1000, S1020 to S1060 in fig. 12, and therefore, the description thereof is omitted.

The core network 300 associates the area information, the UE identifier, and the transmission parameter to set the area setting information (S1400). Specifically, the core network 300 sets the area setting information by associating the UE identifier with the transmission parameter, for example, in units of cells, in units of a cell group constituted by a plurality of cells, in units of a location registration area, or in units of a predetermined area defined by longitude and latitude. In addition, the core network 300 may set a function or a generation rule for associating the UE identifier with the transmission parameter in a one-to-one relationship for each region as the association of the UE identifier with the transmission parameter. The core network 300 transmits region setting information to the UE100 (S1410).

The UE100 determines an area in which the UE100 is located using a cell ID of the cell 203, a cell group ID of a cell group including the cell 203, a location registration area ID of a location registration area including the cell 203, or a longitude and latitude of a place in which the cell 203 is located. The UE100 refers to the association of the UE identifier in the determined region with the transmission parameter to determine the transmission parameter associated with the UE identifier of the UE100 (S1430). In addition, when a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is set for each region in the region setting information, the UE100 may apply the function or the generation rule in the determined region to the UE identifier of the UE100 to generate the transmission parameter associated with the UE identifier in a one-to-one relationship.

In addition, the UE100 may determine an area in which the UE100 is located using a cell ID of a cell of a frequency set in advance. Further, the core network device 301 notifies the UE100 of the cell ID of the cell 203, the cell group ID including the cell group of the cell 203, the location registration area ID including the location registration area of the cell 203, or the longitude and latitude of the place where the cell 203 is located, by broadcasting information.

When the core network 300 acquires acquisition information from the radio access network 200, the cell information is used to acquire the cell ID of the cell 203 that has received the uplink signal capable of identifying the UE identifier, the cell group ID of the cell group including the cell 203, the location registration area ID of the location registration area including the cell 203, or the longitude and latitude of the location where the cell 203 is located. The core network 300 determines the area in which the UE100 is located using the acquired cell ID, cell group ID, location registration area ID, or longitude and longitude of the place in which the cell 203 is located.

The core network 300 refers to the association between the UE identifier in the determined region and the transmission parameter in the region setting information, and acquires the UE identifier associated with the transmission parameter (S1490). When a function or a generation rule that associates a UE identifier with a transmission parameter in a one-to-one relationship is set for each region in the region setting information, the core network 300 applies the function or the generation rule in the specified region to the acquired transmission parameter and acquires the UE identifier.

The core network 300 determines the location of the UE100 in an IDLE state (IDLE state) in units of cells based on the acquired UE identifier and cell information (S1500). That is, the core network 300 recognizes that the UE100 in an IDLE state (IDLE state) camps on the cell 203. The core network 300 stores the determined location of the UE100 in the IDLE state (IDLE state).

(3.3) information distribution processing

Fig. 16 shows information distribution timing. The distribution server 40 transmits (distribution registers) a distribution message to the core network 300 via the external network 30 (S2000). When the core network 300 receives the release message, the release area of the release message is acquired, and the UE that is the object of release of the cell that resides in the release area is determined (S2010). When the UE100 in the IDLE state (IDLE state) is included in the UEs as the release target, the core network 300 transmits a paging signal to the UE100 in the IDLE state (IDLE state) and causes the UE100 to transition to the CONNECTED state (CONNECTED state). The core network 300 transmits a release message to the determined UEs as release targets through downlink unicast, respectively (S2020).

(3.4) modification of information distribution processing

In the present modification, the core network 300 does not determine the location of the UE100 in the IDLE state (IDLE state), but selects a cell transmitting a page based on the distribution area information registered together with the distribution message.

Fig. 17 shows the association of the distribution area with the cells. The core network 300 stores in advance the association of the distribution area and the cell as shown in fig. 17. For example, issue Area _A Including Cell ₁ 、Cell ₂ 、Cell ₃ Issue Area _B Including Cell ₄ ,Cell ₅ Issue Area _C Including Cell ₆ 、Cell ₇ 、Cell ₈ . In addition, the plurality of distribution areas may include the same cell.

Fig. 18 shows a modification of the information distribution timing. The distribution server 40 transmits (distribution registers) a distribution message to the core network 300 via the external network 30, and registers distribution area information (S2100). The distribution area information includes a distribution area in which the distribution message is distributed. The core network 300 refers to the association of the distribution area with the cell to determine the cell included in the registered distribution area (S2110). For example, the registered distribution Area is a distribution Area _A In the case of (a), the core network 300 determines the distribution Area _A Cell included in (a) ₁ 、Cell ₂ 、Cell ₃ 。

The core network 300 sequentially transmits paging signals from the determined cells for the UE100 in an IDLE state (IDLE state) in a location registration area including the determined cells (S2120). The paging signal transmission order may be a UE order in which a cell to which a UE in an IDLE state (IDLE state) is last accessed is close to the distribution area. Accordingly, since the UE that is closer to the distribution area is in the CONNECTED state (CONNECTED state) earlier, the influence of the distribution delay due to the transmission of the plurality of paging signals can be reduced.

The UE100 in an IDLE state (IDLE state) that receives the paging signal transmits a service request signal to the core network 300 (S2130). The core network 300 sets a radio bearer between the UE100 in the IDLE state (IDLE state) that has transmitted the service request signal (S2140), and determines the UE100 to be released that is located in the release area. The core network 300 transmits a release message to the determined UEs as release targets through downlink unicast, respectively (S2150).

(4) Action and Effect

According to the above embodiment, even if the UE is in the IDLE state (IDLE state), the core network 300 can grasp the location of the UE in units of cells and transmit a distribution message such as traffic information to the user devices to be distributed, which reside in the distribution area.

In particular, since the core network 300 can grasp the location of the UE in units of cells even when the UE is in an IDLE state (IDLE state), it is not necessary to set all UEs in the IDLE state (IDLE state) in the location registration area to a CONNECTED state (CONNECTED state) in order to identify the UE to be issued that is in the issue area at the time of issuing. Accordingly, the distribution delay of the distribution message can be reduced.

The core network 300 receives a reception level of an uplink signal capable of determining a UE identifier from the radio access network 200, so that the location of the UE in an IDLE state (IDLE state) can be grasped in more detail in the case where the same UE identifier is associated with a plurality of cell information.

The core network 300 can dynamically change the configuration of radio resources that the radio access network 200 is actually supposed to monitor by transmitting the structure to be monitored. Therefore, compared with a case where the radio access network 200 does not receive the monitoring target structure and monitors the uplink signal that can specify the UE identifier, the load of the radio access network 200 can be reduced. The radio access network 200 can perform control such that the radio resources actually to be monitored are not allocated to other signals.

The core network 300 sets the region setting information so that transmission parameters associated with the UE identifier of one region can be associated with the UE identifier of another region between different regions. Therefore, if the uplink signals of the UE identifiers can be identified as being separated into regions of such a degree that interference does not occur, the transmission parameters can be reused, and the radio resources can be effectively utilized.

The core network 300 previously gives the UE100 a transmission permission of an uplink signal capable of identifying the UE identifier, so that the number of UEs capable of transmitting the uplink signal capable of identifying the UE identifier can be limited. Thereby, the overhead of radio resources is reduced.

(5) Other embodiments

While the present invention has been described in terms of embodiments, it will be apparent to those skilled in the art that the present invention is not limited to these descriptions, but various modifications and improvements can be made.

For example, the distribution server 40 is not limited to a traffic information distribution server that distributes traffic information. The distribution server 40 may be any server that distributes a message, such as weather information, that is effective in a certain area.

Further, the location of the UE is not limited to units of cells. As long as the UE to be distributed included in the distribution area smaller than the location registration area can be grasped, for example, the location of the UE may be grasped in units of a cell group constituted by a plurality of cells.

Further, block diagrams (fig. 2 and 6) used in the description of the above embodiment show functional block diagrams. These functional blocks (structures) are implemented by any combination of hardware and/or software. The implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one device physically and/or logically combined, or may be realized by two or more devices physically and/or logically separated and directly and/or indirectly (for example, by wired and/or wireless) connected, by these multiple devices.

The radio access network 200 and the core network 300 described above may function as a computer that performs the information acquisition process, the location determination process, and the information distribution process of the present invention. Fig. 19 is a diagram showing an example of a hardware configuration of the radio access network 200 and the core network 300. As shown in fig. 19, the radio access network 200 and the core network 300 may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003 (storage), a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

The functional blocks of the radio access network 200 and the core network 300 (see fig. 2 and 6) are realized by any hardware elements of the computer apparatus or a combination of the hardware elements.

The processor 1001, for example, causes an operating system to operate, and controls the entire computer. The processor 1001 may be configured by a central processing unit (CPU: central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.

The Memory 1002 is a computer-readable recording medium, and may be configured by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM: erasable programmable ROM), EEPROM (Electrically Erasable Programmable ROM: electrically erasable programmable ROM), RAM (Random Access Memory: random access Memory), and the like, for example. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The memory 1002 can store programs (program codes), software modules, and the like capable of executing the methods according to the above-described embodiments.

The memory 1003 is a computer-readable recording medium, and may be constituted by at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a Floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a Key drive), a flowpy (registered trademark) disk, a magnetic stripe, and the like), for example.

The communication device 1004 is hardware (transceiver device) for performing communication between computers via a wired and/or wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, or the like, for example.

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a key, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrally formed (for example, a touch panel).

The processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be formed of a single bus or may be formed of different buses between devices.

The information notification is not limited to the above embodiment, and may be performed by other methods. For example, the notification of the information may be implemented by physical layer signaling (e.g., DCI (Downlink Control Information: downlink control information), UCI (Uplink Control Information: uplink control information)), higher layer signaling (e.g., RRC (Radio Resource Control: radio resource control) signaling, MAC (Medium Access Control: medium access control) signaling, broadcast information (MIB (Master Information Block: master information block), SIB (System Information Block: system information block)), other signals, or a combination of these.

The input or output information may be stored in a specific location (for example, a memory), or may be managed in a management table. Information input or output may be rewritten, updated, or tracked, etc. The outputted information may be deleted. The input information and the like may also be transmitted to other devices.

The sequence, flow, and the like in the above-described embodiments can be replaced without contradiction.

In the above-described embodiment, the specific operations performed by the radio access network 200 and the core network 300 may be performed by the radio access network device 201 and the core network device 301, or may be performed by another network node (device). Furthermore, the functionality of the radio access network 200 and the core network 300 may be provided by a combination of a plurality of other network nodes.

The terms described in the present specification and/or terms necessary for understanding the present specification may be replaced with terms having the same or similar meaning. For example, if the corresponding entry is provided, the channel and/or symbol (symbol) may be a signal (signal). Further, the signal may be a message (message). In addition, terms such as "system" and "network" may also be used interchangeably.

The parameter may be represented by an absolute value, a relative value to a predetermined value, or other information. For example, the radio resource may be indicated by an index.

A base station can house 1 or more (e.g., 3) cells (also referred to as sectors). When a base station accommodates a plurality of cells, the coverage area of the base station can be divided into a plurality of smaller areas, and each of the plurality of smaller areas can also provide communication services through a base station subsystem (for example, a small-sized base station RRH: remote Radio Head (remote radio head) for indoor use).

The term "cell" or "sector" refers to a portion or the entirety of the coverage area of a base station, and/or base station subsystem, that is in communication service within that coverage area. In addition, the terms "base station", "cell" and "sector" may be used interchangeably in this specification. For a base station, the following terms are also used: fixed station (fixed station), nodeB, eNodeB (eNB), gndeb (gNB), access point (access point), femto cell, small cell, etc.

With respect to UE100, a subscriber station, mobile unit (mobile unit), subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent (user agent), mobile client, or some other suitable terminology is sometimes referred to as a subscriber station, mobile unit, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, or some other suitable terminology, depending on the person skilled in the art.

The term "according to" as used in the present specification is not intended to mean "according only to" unless explicitly stated otherwise. In other words, the expression "according to" means both "according to" and "according to at least".

Further, as used in the specification or claims, the terms "including", "comprising" and variations thereof are intended to be inclusive in the same sense as the term "having". The term "or" used in the present specification or claims means not exclusive or.

Any reference to elements referred to in the specification as "1 st", "2 nd", etc. is also not intended to limit the amount or order of the elements in their entirety. These designations can be used in this specification as a simple method of distinguishing between 2 or more elements. Thus, references to elements 1 and 2 do not mean that only 2 elements can be employed herein, or that in some forms the 1 st element must precede the 2 nd element.

In the whole of the present disclosure, in the case where an article is appended by translation, such as a, an, and the in english, a plurality of articles may be included if not explicitly indicated from the context.

While the embodiments of the present invention have been described above, the discussion and drawings forming a part of this disclosure should not be construed as limiting the invention. It will be apparent to those skilled in the art from this disclosure that various alternative embodiments, examples, and operational techniques can be made.

Industrial applicability

According to the radio access network described above, even if the user device is in an IDLE state (IDLE state), the mobile communication network can grasp the location of the user device in units of a smaller area than the location registration area, and can transmit a distribution message such as traffic information to the user device as a distribution target belonging to the distribution area, and thus is useful.

Description of the reference numerals:

10. information distribution system

20. Wireless communication system

40. Publishing server

100 UE

200. Wireless access network

201. Wireless access network device

203. Cell

211. Receiving part

213. Transmitting unit

215. Control unit

220. Wireless communication unit

230. Storage unit

240. Signal processing unit

250. Cell processing unit

260. Information processing unit

300. Core network

301. Core network device

340. Storage unit

350. Setting part

360. Signal processing unit

370. Information processing unit

1001. Processor and method for controlling the same

1002. Memory

1003. Memory device

1004. Communication device

1005. Input device

1006. Output device

1007. Bus line

Claims

1. A radio access network, the radio access network comprising:

a receiving unit that receives an uplink signal from a user device;

a control unit that acquires a user equipment identifier and cell information specifying a cell that received the uplink signal, based on an association between a transmission parameter of the uplink signal and the user equipment identifier; and

And a transmitting unit configured to transmit the user equipment identifier and the cell information acquired by the control unit to a core network.

2. The wireless access network of claim 1, wherein the wireless access network comprises a plurality of wireless access networks,

the uplink signal is a random access preamble,

the transmission parameter includes at least one of a time and frequency resource allocated to transmission of the random access preamble and a random access preamble sequence for transmission of the random access preamble.

3. The wireless access network of claim 1, wherein the wireless access network comprises a plurality of wireless access networks,

the control section detects a reception level of the uplink signal received by the reception section,

the transmitting unit transmits the reception level detected by the control unit to the core network.

4. The wireless access network of claim 1, wherein the wireless access network comprises a plurality of wireless access networks,

the receiving unit receives an uplink signal as a monitoring target from the core network,

according to the above configuration, the control unit receives the uplink signal to be monitored from the user device via the receiving unit.

5. The wireless access network of claim 1, wherein the wireless access network comprises a plurality of wireless access networks,

The receiving unit receives, from the core network, an association of the user device identifier and the transmission parameter set for each predetermined area,

the control unit obtains the user equipment identifier based on the association based on an area in which the cell that receives the uplink signal is located.