WO2014006803A1 - サーバ及び通信端末 - Google Patents
サーバ及び通信端末 Download PDFInfo
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- WO2014006803A1 WO2014006803A1 PCT/JP2013/002741 JP2013002741W WO2014006803A1 WO 2014006803 A1 WO2014006803 A1 WO 2014006803A1 JP 2013002741 W JP2013002741 W JP 2013002741W WO 2014006803 A1 WO2014006803 A1 WO 2014006803A1
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- trigger
- address
- communication terminal
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- data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
- H04L63/126—Applying verification of the received information the source of the received data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
Definitions
- the disclosed technology relates to a communication technology using a cellular communication function, and in particular, uses a technology of machine-to-machine communication (referred to as Machine to Machine Communication or Machine Type Communication, hereinafter referred to as M2M communication (or MTC)).
- M2M communication Machine Type Communication
- the present invention relates to a communication server and a communication terminal.
- the cellular communication function is used not only for voice calls and data communication such as mobile phones and smartphones, but also widely used in devices for M2M communication (also called MTC devices).
- M2M communication also called MTC devices.
- Cellular communication terminals including MTC devices ( Hereinafter, the number of UEs (referred to as “User Equipment” or communication terminals) continues to increase.
- application data hereinafter also referred to as application PDU, application payload, or data
- SCS Service Capability Server, or MTC server, or simply called a server
- the SCS that has received the data from the AS transmits the data to the UE using an appropriate transmission means.
- the transmission means for example, a method of creating an IP packet addressed to the IP address of the UE and transmitting it as an application data packet to the UE, or a method of transmitting data in a control message transmitted to an entity in the cellular network and so on.
- the SCS transmits a control message including data to an IWF (Interworking Function) that is a gateway to the cellular network.
- IWF Interworking Function
- This message is called a device trigger request (Device Trigger Request, hereinafter also referred to as a trigger request), and the MTC-IWF that has received the device trigger request selects a means for notifying the UE of trigger information such as data.
- the transmission process is started.
- a message (device trigger, also referred to as trigger hereinafter) for notifying trigger information to the UE a method of transmitting as an SMS (Short Message Service) message via SMS-SC, or a CBS (Cell Broadcast Service) message via CBC , A method of transmitting as an MBMS (Multicast Broadcast Message Service) message, a method of transmitting as a control message transmitted via an entity in the core network, and the like.
- SMS Short Message Service
- CBS Cell Broadcast Service
- MBMS Multicast Broadcast Message Service
- the IWF sends a control message (T5 interface) including trigger information to the MME / SGSN / MSC, and the MME / SGSN / MSC that receives the control message. Transmits a NAS (Network Access Stratum) message including trigger information to the UE.
- the UE that has received the trigger transmits a trigger response to the MME / SGSN / MSC.
- the trigger response may include UE application data as required.
- connection for the UE to perform data communication with the SCS (referred to as a user plane, PDP context, PDN connection, etc.) is not yet available, after the processing related to the device trigger is completed, the UE The procedure (connection, connection establishment, connection validation, bearer establishment, bearer validation, bearer change) is executed. These procedures are started by transmitting a control message such as a connection establishment request, a service request, or a bearer establishment request.
- the UE that has received the trigger can acquire an IP address by establishing a connection, and can transmit an IP packet including application data to be passed to the AS to the SCS.
- the SCS needs to pass data included in the IP packet received from the UE to an appropriate AS.
- the SCS Since the SCS does not hold the IP address of the UE, it sends a control message instead of sending an IP packet. Therefore, since the SCS that has received the IP packet including application data from the UE after transmitting the control message does not have information on the IP address set in the source address of the IP header, the source UE is specified. I can't. Even if the UE identifier is included in the application data in the IP packet, the application data is created in a format that is interpreted by the AS, so the SCS cannot interpret the format of the application data. . For this reason, since the SCS cannot authenticate the source UE when receiving the IP packet, the data is passed to the AS without specifying the UE that is the source of the IP packet, resulting in a security risk. .
- the disclosed technique discloses a technique capable of notifying an SCS of an IP address using a control message before starting transmission of an IP packet.
- one aspect of the disclosed technology is a communication terminal that communicates with a predetermined communication device via a network, and is requested to transmit a control message transmitted from the predetermined communication device to the communication terminal.
- a control message receiving unit that receives the control message generated based on the trigger request message to be transmitted from the network, a determination unit that determines whether to perform the communication with the predetermined communication device using an IP packet, When it is determined that the communication is performed using an IP packet when the control message is received by the control message receiving unit, an IP address assigned to the IP connection used for the communication with the predetermined communication device is A connection management unit to acquire, and a response message to the control message, the connection message A response message including the IP address of emissions management unit obtains including the communication terminal and a response message transmitting unit that transmits to the network.
- the aspect of the disclosed technique may be realized by a communication system, a computer program, or a combination thereof in addition to the communication terminal.
- an effect that the IP address of the UE can be included in a trigger response that is a control message and notified to the SCS is realized.
- the figure which shows an example of the network structure in 1st Embodiment of this indication technique The sequence diagram which shows the 1st example of operation
- the sequence diagram which shows an example of the process which UE100 which received the device trigger in 1st Embodiment of this indication technique performs
- the sequence diagram which shows an example of the process which SCS300 which received the trigger report in 1st Embodiment of this indication technique performs
- the flowchart which shows an example of the process which UE100 which received the device trigger in 1st Embodiment of this indication technique performs
- the block diagram which shows an example of a structure of SCS300 in 1st Embodiment of this indication technique The sequence diagram which shows the example of operation
- the flowchart which shows the 1st example of the process which UE100 which received the device trigger performs
- the flowchart which shows the 2nd example of the process which UE100 which received the device trigger performs
- FIG. 1 is a diagram illustrating an example of a network configuration according to the first embodiment of the disclosed technique.
- a UE 100 that is a cellular communication terminal, a cellular network (also referred to as a core network or a 3GPP network, hereinafter also referred to as a network) 200 to which the UE 100 is connected, and a trigger request addressed to the UE 100 are transmitted.
- An SCS 300 to perform and an application server 400 to perform data communication with the UE 100 are illustrated.
- IWF 210 that connects the cellular network 200 and the SCS 300, management of location information (location) of the UE 100, communication control of the UE 100 (circuit switching control or packet switching control), and the like are performed.
- MME / SGSN / MSC Mobility Management Entity / Serving GPRS Support Node / Mobile Switching Center
- P-GW / GGSN that performs connection management for data communication of the UE 100, data transfer to an external network, user authentication, QoS control, etc.
- EPDG Packet Data Network Gateway / Gateway GPRS Support Node / evolved Packet Data Gateway
- connection management between the base station to which the UE 100 is connected (attached) and an entity in the cellular network 200 (for example, P-GW) and user data S-GW (Serving Gateway) 240 that performs data transfer
- eNB / NB / BS250 evolved Node B / Node B / Base Station
- eNB / NB / BS250 evolved Node B / Node B / Base Station
- HSS / HLR Home Subscriber Server / Home Location Register
- SMS-SC Short Message Service-Service Center
- GMSC Short Message Service-Service Center
- IWF IWF 210 having a role of transmitting SMS to the UE 100 DNS 280 that holds the correspondence between IDs and IP addresses is shown.
- FIG. 1 illustrates an example of a network configuration for realizing the functions defined in 3GPP.
- the network configuration to which the disclosed technology is applied is limited to that illustrated in FIG. Is not to be done.
- the MME / SGSN / MSC 220 illustrated in FIG. 1 is referred to as an MME 220 in order to clarify the technical idea according to the disclosed technology
- the P-GW / illustrated in FIG. GGSN / ePDG230 may be described as P-GW230.
- the SCS 300 If the SCS 300 does not hold the IP address of the UE 100 when acquiring the application data from the AS 400, the SCS 300 transmits a device trigger (control message) transmission request addressed to the UE 100 to the IWF 210.
- the IWF 210 transmits trigger information including data to the UE 100 via the network 200.
- There are a plurality of means for transmitting the trigger information such as a method using a control message (C-plane (control plane)) such as an SMS message, a CBS message, and a message addressed to the MME 220.
- One of the means is selected based on the congestion situation.
- the MME 220 and the SMS-SC 270 receive a request from the IWF 210 and send a device trigger, which is an SMS message including trigger information, to the UE 100. It has a role to send to.
- the IWF 210 requests the SMS-SC 270 to transmit a device trigger
- the SMS-SC 270 requests the MME 220 to transmit the SMS.
- the MME 220 transmits the SMS received from the SMS-SC 270 to the UE 100.
- the MME 220 transmits SMS to the UE 100 including SMS in the NAS message container of the Downlink NAS Transport.
- a message dedicated to SMS is transmitted to the UE 100.
- the IWF 210 can also transmit a trigger request using an interface connected to the MME 220.
- the MME 220 may transmit the trigger information included in the trigger request as a device trigger by including it in the NAS-message-container of the Downlink-> NAS-Transport, or include it in another NAS message. It may be transmitted as a device trigger.
- the trigger information When the trigger information is put in the NAS message container, the trigger information converted into the SMS format may be inserted.
- the P-GW 230 can be requested to transmit an IP packet including trigger information to the UE 100.
- the IWF 210 of the disclosed technique does not use this method.
- the SCS 300 transmits a device trigger transmission request (trigger request) to the IWF 210, and the IWF 210 that has received the trigger request triggers using an interface connected to the MME 220 as a trigger information transmission unit.
- a means for transmitting information is selected will be described as an example.
- the MME 220 transmits a control message (NAS message) including the trigger information received from the IWF 210 to the UE 100 as a device trigger.
- the application server 400 that performs application layer communication with the UE 100 may operate on the SCS 300 or may operate on another node connected to the SCS 300. Further, the SCS 300 may be disposed in the cellular network 200.
- control messages transmitted at this time include a connection request (ATTACH REQUEST), a disconnection request (DETACH REQUEST), a service request (SERVICE REQUEST), a PDN connection establishment request (PDN CONNECTIVITY REQUEST), and a dedicated bearer establishment request (ACTIVATE DEDICATED
- EPS BEARER CONTEXT REQUEST bearer resource allocation request
- BEARER RESOURCE ALLOCATION ⁇ ⁇ REQUEST bearer resource change request
- BEARER RESOURCE ⁇ ⁇ MODIFICATION REQUEST etc.
- a connection (PDN connection, default bearer, dedicated bearer) necessary for an application that has received a device trigger to perform data communication with the SCS 300 is not established (cannot be used)
- the necessary connection is established. Therefore, a control message (PDN connection establishment request, dedicated bearer establishment request (bearer establishment request, bearer change request)) is transmitted.
- a dedicated bearer instead of newly establishing a dedicated bearer, an existing bearer may be updated and changed to a bearer that satisfies the application request.
- the UE 100 can acquire an IP address, and can transmit a data packet (application message) to the SCS 300 via the established connection.
- the PDN connection is a data communication connection established between the UE 100 and the PGW 230, and is assigned a single IP address used by the UE 100.
- a bearer also referred to as an EPS bearer
- GBR Guard BitRate
- a PDN connection is established for a specific APN (Access Point Name, PDN (Packet Data Network) identifier)
- a default bearer is also established at the same time.
- the UE 100 After the PDN connection and the default bearer are established, the UE 100 establishes an arbitrary dedicated bearer in response to a request such as an application.
- a bearer in EPS Evolved Packet System
- PDP Packet Data Protocol
- UMTS Universal Mobile Telecommunications System
- the application server 400 is assumed as a communication partner of the UE 100.
- the communication partner of the UE 100 is not limited to the application server 400, and is another UE.
- the cellular network 200 shown in FIG. 1 includes LTE / SAE / EPS (Long Term Evolution / System Architecture Evolution / Evolved Packet System), UMTS, GPRS (General Packet Radio Service), and GSM (Global System Mobile Communications).
- LTE / SAE / EPS Long Term Evolution / System Architecture Evolution / Evolved Packet System
- UMTS Universal Mobile Term Evolution / Evolved Packet System
- GPRS General Packet Radio Service
- GSM Global System Mobile Communications
- WiMAX Worldwide Interoperability for Microwave Access
- WLAN Wireless Local Access Network
- FIG. 2 is a sequence diagram illustrating a first example of operations of the SCS 300 and the UE 100 according to the first embodiment of the disclosed technology.
- the SCS 300 transmits a trigger request to the IWF 210 in order to transmit the data acquired from the AS 400 to the UE 100.
- the SCS 300 may inquire the DNS 280 about the IP address of the IWF 210 that is the transmission destination of the trigger request. If the IP address of the IWF 210 is already held, the inquiry to the DNS 280 is omitted.
- the SCS 300 transmits a trigger request including the ID of the UE 100 (External Identifier or MSISDN (Mobile Subscriber ISDN Number)) and the ID of the SCS 300 to the IWF 210 (step S2002).
- MSISDN Mobile Subscriber ISDN Number
- the SCS 300 includes information notified to the application of the UE 100 in a payload field (hereinafter referred to as a trigger payload) in the trigger request.
- the information notified to the application of the UE 100 is data acquired from the AS 400 or data generated by the SCS 300. If the size of the data acquired from the AS 400 is smaller than the size of the trigger payload, the SCS 300 may include all the data in the trigger payload. On the other hand, when the size of the data acquired from the AS 400 is larger than the size of the trigger payload, a part of the data may be included in the trigger payload and the rest may be transmitted as an IP packet, or all data may be transmitted as an IP packet. You may send it.
- the data in the trigger payload is transparent to entities in the core network (IWF 210, MME 220, etc.), and is notified to the UE 100 with the information inserted by the SCS 300.
- the ID of the UE 100 included in the trigger request indicates the transmission destination (target) of the control message transmitted by the IWF 210 and the MME 220.
- the IWF 210 Upon receiving the trigger request, the IWF 210 performs confirmation of the SCS 300 that is the trigger request transmission source, confirmation of registration information (subscription information) of the UE 100 that is the trigger transmission destination, and load control of the trigger request.
- the confirmation of the SCS 300 is a check as to whether or not the trigger request received from the SCS 300 may be accepted. For example, whether or not the SCS is authorized to transmit a device trigger (Authorize). This is confirmation of whether the SCS is restricted from being transmitted or whether there is a format error in the received trigger request message.
- Checking trigger request load control is a check on network bandwidth, traffic load, and contract details by sending and receiving trigger requests. For example, the number of trigger requests sent by SCS300 (Submission Quota) exceeds a specified value.
- the load status such as whether the trigger request transmission frequency (Submission Rate) does not exceed the specified value, or whether the IWF processing load is overloaded. For example, if the transmission frequency of the trigger request received from the SCS 300 exceeds a prescribed value (such as an upper limit value determined by the contract), it is determined that there is a problem with the load control and the trigger request is rejected.
- the registration information check of the UE 100 refers to the information of the UE 100 to an HSS (Home Subscription Server) and confirms whether or not a device trigger can be transmitted to the UE. For example, if the UE is not qualified to receive the device trigger as a result of checking the UE information, or if the UE is not ready to receive the device trigger, it is determined that there is a problem with the UE information and the trigger request is rejected. To do. If there is no problem with these checks, the IWF 210 transmits a device trigger request to the MME 220 (step S2003). Receiving this, the MME 220 transmits a control message (device trigger) including trigger information to the UE 100 (step S2004).
- HSS Home Subscription Server
- FIG. 3 is a flowchart showing an example of processing (steps S2004 to S2006 in FIG. 2) performed by the UE 100 that has received the device trigger.
- the UE 100 that has received the device trigger confirms whether there is a connection for data communication with the AS 400 (S3002). If there is no connection, processing for establishing a connection is executed (S3003). In this case, the UE 100 does not transmit a trigger response to the device trigger until a connection is established and an IP address can be acquired. Then, the IP address assigned to the connection is included in a predetermined field (trigger payload) of the trigger response (S3004) and transmitted to the MME 220 (S3005).
- Trigger payload a predetermined field
- the connection for data communication with the AS 400 is a connection connected to a PDN (Packet Data Network) in which the AS 400 exists. That is, it communicates with the SCS 300 on the PDN identified by the APN (Access Point Name) derived from the data included in the trigger payload in the received device trigger or the APN corresponding to the application that is the device trigger target.
- APN Access Point Name
- a header configured in a format that can be interpreted by the SCS 300 (hereinafter referred to as an SC (Service Capability) header) is created, and an IP address is included in the header at a predetermined position (frontmost or last) of the trigger payload. Deploy. If there is data to be notified from the UE 100 to the AS 400, an SC header added to the head of the data is inserted into the trigger payload.
- SC Service Capability
- FIG. 5 is a diagram showing an example of the message structure of the trigger response when the SC header is added.
- the MME 220 that has received the trigger response transmitted from the UE 100 includes the trigger payload included in the trigger response in the trigger report and transmits the trigger report to the IWF 210, and the IWF 210 transmits the trigger report to the SCS 300 (steps S2007 and S2008).
- step S2006 is called a trigger response
- steps S2007 and S2008 are called a trigger report to distinguish them, but a message that can notify the SCS 300 of a trigger payload (SC header and data) inserted by the UE 100 is distinguished. Any message may be used.
- FIG. 4 is a flowchart showing an example of processing performed by the SCS 300 that has received the trigger report (steps S2008 to S2010 in FIG. 2).
- the SCS 300 Upon receiving the trigger report (S4001), the SCS 300 acquires information included in the trigger payload of the trigger report (S4002), and checks whether the trigger payload includes an SC header including an IP address (S4002). S4003). If there is an SC header, the IP address included in the SC header is acquired, and the IP address and UE ID are associated with each other and held (S4004). Then, the remaining part from which the SC header is removed is notified as data to the AS (S4005).
- the SCS 300 Since the message transmitted / received between the IWF 210 and the SCS 300 is a message (control message) that satisfies security requirements such as confidentiality and integrity, the SCS 300 has an IP address included in the trigger report received from the IWF 210 as the UE 100. Can be trusted.
- the UE 100 notifies the SCS 300 of the IP address using the user plane, it is necessary to ensure security using a security mechanism such as IPSec, so that the processing load on the UE 100 and the SCS 300 increases. By notifying the address, the processing load can be reduced.
- step S4003 if there is no SC header including the IP address, all information in the trigger payload is notified to the AS as data (S4005). On the other hand, after acquiring the IP address of the UE 100 from the SC header, the remaining information with the SC header removed is notified to the AS as data (S4005). In S4003, the SC header exists, but when the IP address is not included, similarly, the remaining portion from which the SC header is removed is notified to the AS as data. Returning to FIG. 2, the UE 100 transmits an IP packet including data to the SCS 300 (S2011).
- the SCS 300 that has received the IP packet checks the source address of the IP packet (S2012), and if it holds the IP address of the source, notifies the AS 400 of the data contained in the IP payload (S2013). ). On the other hand, when the IP address corresponding to the transmission source address is not held, the transmission source UE cannot be specified, and the IP packet is discarded.
- the case where the IP address of the transmission source is held is a case where the IP address of the transmission source matches the IP address notified in the trigger report in step S2009, and the UE corresponding to the IP address can be specified. is there. If a header to be processed by the SCS 300 is added to the data in the IP payload, the remaining part of the data from which the header has been removed is notified to the AS 400.
- FIG. 6 is a sequence diagram illustrating a second example of the operations of the SCS 300 and the UE 100 according to the first embodiment of the disclosed technology.
- the difference from the first example described with reference to FIG. 2 is that the UE 100 that has received the trigger confirms the application data to be transmitted to the AS 400 in step S6005 before confirming the presence or absence of the connection in step S6006. .
- the other steps are the same as those in FIG.
- FIG. 7 is a flowchart illustrating an example of processing (steps S6004 to S6007) performed by the UE 100 that has received the device trigger.
- the difference from the operation of the UE 100 in the first example described with reference to FIG. 3 is that in step S7002, it is confirmed whether or not the data notified from the application of the UE 100 to the AS 400 needs to be transmitted as an IP packet. .
- the UE 100 that has received the device trigger (S7001) notifies the application of the trigger payload included in the device trigger (S7002). If the application is not activated, data is notified after the application that is the target of the device trigger is activated.
- the NAS layer of the UE 100 receives the device trigger, and notifies the trigger payload to an appropriate application or a layer that controls the application (hereinafter referred to as an SC (Service Capability) layer).
- the SC layer has a role of processing the trigger payload and notifying data contained in the trigger payload to an appropriate application as necessary.
- the target application is specified (started up) from the application ID included in the SC header, and the remaining information with the SC header removed is notified to the application as data. That is, the NAS layer of the UE 100 stands by until the trigger payload and the data processing result are notified by the SC layer and the application before transmitting the trigger response to the received device trigger.
- the functions of these SC layers may be provided by a layer positioned between the NAS layer and the application layer, may be provided as one application that operates in the application layer, or provided by the NAS layer. May be.
- the NAS layer needs to transmit data using IP packets. You may judge that there is. Note that the determination as to whether or not data needs to be transmitted using an IP packet may be performed only in the NAS layer of the UE 100. For example, based on the identification information of the SCS 300 included in the device trigger and the identification information of the AS 400 that generated the data, it is confirmed whether or not data communication using an IP packet is necessary.
- step S7004 When it is necessary to transmit data by IP packet, it is confirmed whether or not there is a connection for data communication with the AS 400 (S7004).
- the operation after step S7004 is the same as the operation after step S3002 in FIG.
- a trigger response in which a trigger payload including only data is inserted is transmitted (S7007).
- the UE 100 may insert a data obtained by adding an SC header that does not include an IP address into the trigger payload, and transmit a trigger response including the trigger payload.
- FIG. 8 is a block diagram illustrating an example of a configuration of the UE 100 according to the first embodiment of the disclosed technology.
- the UE 100 illustrated in FIG. 8 includes an interface 101, a device trigger processing unit 102, a connection management unit 103, an application unit 104, a trigger response transmission unit 105, and an IP packet transmission unit 106.
- the interface 101 has a function for the UE 100 to connect to the network and transmit / receive control messages and IP packets.
- the interface 101 also includes hardware that modulates and demodulates information into an electrical signal in order to communicate with other communication devices (for example, a network node or other UE 100 arranged on the network).
- the device trigger receiving unit 102 receives the device trigger and passes the trigger payload included in the device trigger to the application unit 104. Further, it instructs the connection management unit 103 to establish a connection.
- the connection management unit 103 receives an instruction from the device trigger reception unit 102 or the trigger response transmission unit 105 and establishes a connection. If there is already a connection that can be used for communication with the AS 400, the trigger response transmission unit 105 is notified of the IP address assigned to the connection. Note that the processing performed by the connection management unit 103 is not limited to establishing a new connection, but includes changing an established connection.
- the application unit 104 checks the trigger payload notified from the device trigger receiving unit 102, generates data to be transmitted to the AS 400, and notifies the trigger response transmitting unit 105 of the data.
- the trigger response transmission unit 105 acquires an IP address from the connection management unit 103 and transmits a trigger response including the IP address. Further, after transmitting the trigger response, the IP packet transmission unit is instructed to transmit the data in the IP packet.
- the IP packet transmission unit 106 transmits an IP packet including data notified to the AS 400 received from the trigger response transmission unit 105 to the SCS 300.
- FIG. 9 is a block diagram illustrating an example of the configuration of the SCS 300 according to the first embodiment of the disclosed technology.
- 9 includes an interface 400, a trigger request transmission unit 302, a transmission means determination unit 303, an IP packet reception unit 304, an application unit 305, a UE information holding unit 306, and a trigger response reception unit 307. Yes.
- the interface 101 has a function for the UE 100 to connect to the network and transmit / receive control messages and IP packets.
- the interface 101 also includes hardware that modulates and demodulates information into an electrical signal in order to communicate with other communication devices (for example, a network node or other UE 100 arranged on the network).
- the trigger request transmission unit 302 Upon receiving an instruction from the transmission means determination unit 303, the trigger request transmission unit 302 transmits a trigger request for requesting the UE 100 to transmit a device trigger to the IWF 210.
- the data notified from the application unit 305 is included in the trigger payload of the trigger request.
- the transmission means determination unit 303 selects a means for transmitting the data notified from the application unit 305 to the UE 100.
- the trigger request transmission unit 302 is instructed to transmit the trigger request.
- the IP packet receiving unit 304 refers to the correspondence between the UE ID and the IP address held in the UE information holding unit 306, and identifies the UE having the source address of the received IP packet.
- the application unit 305 is notified of the data included in the IP packet.
- the application unit 305 receives data from the AS 400 and instructs the transmission means determination unit 303 to transmit it to the UE 100.
- the data received from the IP packet receiving unit 304 and the trigger response receiving unit 307 is notified to the AS 400.
- the application unit 305 may include the function of the AS 400.
- the UE information holding unit 306 holds the correspondence between the UE ID and the IP address.
- the trigger report receiving unit 307 receives the trigger report, acquires the IP address set in the SC header in the trigger payload included in the trigger report, and instructs the UE information holding unit 306 to hold it. Further, the remaining trigger payload from which the SC header is removed is notified to the application unit 305.
- the UE 100 establishes a connection for communication with the AS 400 and returns the response before returning a response to the received device trigger. Since the IP address can be included in the trigger response in a format that can be interpreted by the SCS 300, the SCS 300 can hold the IP address of the UE 100 included in the reliable trigger report message received from the core network 200. Since the IP address of the UE 100 can be known before receiving the IP packet from the UE 100, the data is notified to the AS 400 when the transmission source address of the received IP packet can be confirmed. As a result, the IP address of the UE 100 is notified to the SCS 300 with a reliable message, so the SCS 300 receives only the IP packet sent from the reliable IP address and notifies the AS 400 of the data included in the IP packet. Can do.
- FIG. 10 is a sequence diagram illustrating a first example of operations of the SCS 300 and the UE 100 according to the second embodiment of the disclosed technology.
- the difference from the first example of the first embodiment of the disclosed technology described with reference to FIG. 2 is that the UE 100 that has received the trigger confirms the application data received in step S10005.
- the other steps are the same as those in FIG.
- FIG. 11 is a flowchart showing a first example of processing (steps S10004 to S10007) performed by the UE 100 that has received a device trigger.
- the difference from the operation of the UE 100 in the first example of the first embodiment of the disclosed technology described with reference to FIG. 3 is whether or not data is included in the trigger payload in step S11003. I'm about to do it.
- the UE100 which received the device trigger acquires the trigger payload contained in the device trigger (S11002). It is confirmed whether or not data is included in the trigger payload (S11003). If not included, the SCS 300 is notified of the IP address from the UE 100 in order to transmit the data notified from the AS 400 in an IP packet. It is interpreted as waiting. Therefore, after passing through the processing of step S11004 and step S11005, the UE 100 finally inserts and transmits the SC header including the IP address in the trigger response in the trigger payload (S11006, S11007). Since the process after step S11004 is the same as that of FIG. 2, description is abbreviate
- the SCS 300 interprets that the data notified from the AS 400 is included in the trigger payload, and the SCS 300 does not need to transmit the data notified from the AS 400 in an IP packet. Interpret that it may be. Therefore, the UE 100 transmits a trigger response that does not include an IP address (S11007). Note that the UE 100 may transmit a trigger response in which a trigger payload including only data is inserted, or may transmit a trigger response in which a trigger payload including data with an SC header not including an IP address is added. . In step S11003, when the SC header is included in the trigger payload, it is confirmed whether or not data is included in the remaining part after removing the SC header. , The process proceeds to step S11007, and if not included, the process proceeds to step S11004. A method for determining whether to notify the IP address based on the SC header will be described later.
- the UE 100 transmits an IP packet including data to the SCS 300 (S10012).
- the SCS 300 that has received the IP packet checks the source address of the IP packet (S10013), and if the source UE can be identified, notifies the AS 400 of the data (S10014). On the other hand, when the UE corresponding to the transmission source address cannot be specified, the IP packet is discarded without notifying the AS 400 of the data.
- FIG. 12 is a flowchart showing a second example of processing (steps S10004 to S10007) performed by the UE 100 that has received the device trigger.
- the difference from the operation of the UE 100 in the first example of the second embodiment of the disclosed technology described with reference to FIG. 11 is that when there is no connection in step S12002, a trigger payload is acquired (S12003).
- the SCS 300 interprets that the IP address is notified from the UE 100 in order to transmit the data notified from the AS 400 as an IP packet. Therefore, the UE 100 executes connection establishment processing (S12007), inserts an SC header including an IP address into the trigger payload, and transmits a trigger response including the trigger payload (S12008, S12009).
- the delay notification information of the IP address is included in the SC header, the SC header is inserted into the trigger payload (S12005), and a trigger response including the trigger payload is transmitted (S12006). . Then, a connection establishment process is executed in parallel (S12007), an SC header including the IP address assigned to the established connection is inserted into the trigger payload (S12008), and a trigger response including the trigger payload is transmitted again. (S12009).
- the SCS 300 receives a trigger report including an IP address delay notification, the SCS 300 holds the delay notification in association with the UE 100 ID.
- the SCS 300 includes an SC header in the trigger payload of the trigger request transmitted to the IWF 210.
- the SCS 300 inserts the data received from the AS 400 with the SC header added to the beginning of the data into the trigger payload.
- the field containing the IP address of the SC header may contain the IP address of the SCS 300.
- the field including the application ID of the SC header may include an identifier of the AS 400 or an identifier of an application operating in the AS 400.
- the SCS 300 may include an SC header in the trigger payload in order to request the UE 100 to notify the IP address.
- the SCS 300 may insert a part of the data notified from the AS 400 with the SC header added thereto, or may insert only the SC header into the trigger payload.
- the SCS 300 holds the data that has not been put in the trigger payload until the IP address notification is received from the UE 100, acquires the IP address of the UE 100, and transmits it to the UE 100 as an IP packet.
- the SCS 300 may explicitly include in the SC header information indicating that the notification of the IP address of the UE 100 is requested.
- the IP address of the UE 100 is set by setting a flag indicating that the notification of the IP address is requested in the SC header, or by making the field including the IP address of the UE 100 empty (zero value) or an arbitrary value. May indicate that the notification is requested.
- information indicating that notification of the IP address of the UE 100 is unnecessary may be explicitly included in the SC header.
- the NAS layer of the UE 100 that has received the device trigger passes the trigger payload included in the device trigger to the SC layer.
- the SC layer determines that it is necessary to notify the SCS 300 of the IP address when the trigger payload includes the SC header or when the SC header includes information requesting notification of the IP address.
- the trigger payload including the SC header in which the IP address is set is inserted into the trigger response and transmitted.
- the SC layer specifies (starts) the target application from the application ID included in the SC header, and notifies the application of the remaining information from which the SC header is removed as data.
- the SC layer acquires the IP address and uses it as a destination address when transmitting an IP packet to the SCS 300.
- the UE 100 determines whether there is an SC header in the trigger payload of the received device trigger, or confirms the contents of the SC header and determines whether it is necessary to notify the SCS 300 of the IP address. .
- the UE 100 should notify the SCS 300 of the IP address by confirming the received trigger trigger of the device trigger. Can be judged. Further, although it is not necessary to immediately notify the SCS 300 of the IP address, by notifying the IP address in advance after establishing the connection, the SCS 300 uses the IP packet to the UE 100. Even if there is data to be transmitted, it can be determined that the device trigger request should not be transmitted immediately but the notification of the IP address from the UE 100 should be waited. Thereby, unnecessary transmission of a device trigger request can be eliminated.
- the IP connection when the connection management unit acquires the IP address, the IP connection may be newly established when the IP connection is not established.
- the response message transmission unit may insert the IP address into a field for entering application information in the response message.
- the response message transmission unit may determine that the communication is performed using an IP packet when application data is not included in the control message. Good.
- the communication terminal when the response message transmission unit has the application data to be transmitted to the predetermined communication device, the communication terminal performs the communication using an IP packet. You may judge.
- one aspect of the disclosed technology is a server that mediates communication between a communication terminal and an application server, and a trigger that requests transmission of a control message to the communication terminal when data is acquired from the application server.
- a trigger request transmission unit for transmitting a request to a network node; and a response message for the control message transmitted from the network to the communication terminal based on the trigger request, the response message including an IP address of the communication terminal
- a report receiving unit that receives the report message including the IP address from the received network node and acquires the IP address of the communication terminal included in the report message; and the identification information of the IP address and the communication terminal Communication terminal to hold in association It may include a server having a broadcast holding portion.
- the IP address may be inserted in a field for entering application information of the report message.
- the server when the source address of the received IP packet matches the IP address held in the communication terminal information holding unit, the IP packet is included in the IP packet You may further have an IP packet receiving part which notifies a payload to the said application server.
- one aspect of the disclosed technology is realized by a method realized by a communication terminal or the like in addition to a communication terminal and a server, a program for causing a computer to execute the method, a recording medium storing the program, and the like. May be.
- each functional block used in the description of the above embodiment may be realized by hardware, software, or a combination thereof.
- the functional blocks included in each device shown in the block diagram or the like, or each processing unit having an equivalent function is realized by hardware such as various computer CPUs, memories, and various interfaces including communication interfaces. May be.
- each functional block and each processing unit may be realized by causing a computer to execute a program in which operations related to each function are described.
- the flowcharts and sequence charts in the above embodiments may be realized by hardware such as a CPU and a memory.
- each function block used in the description of each of the above-described embodiments, each step in the flowchart, and each process in the sequence chart is typically realized as an LSI that is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the disclosed technique has an effect that the IP address of the UE can be included in a trigger response that is a control message before communication with the SCS can be notified to the SCS, and communication using the cellular communication function It can be applied to technology (particularly, technology of M2M communication).
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Abstract
Description
まず、本開示技術の第1の実施の形態について説明する。図1は、本開示技術の第1の実施の形態におけるネットワーク構成の一例を示す図である。図1には、セルラー通信端末であるUE100と、UE100が接続するセルラーネットワーク(コアネットワーク、3GPPネットワークとも呼ぶ。以下、単にネットワークと記載することもある)200と、UE100宛てのトリガ要求の送信を行うSCS300、及びUE100とデータ通信を行うアプリケーションサーバ400が図示されている。
次に、本開示技術の第2の実施の形態において、デバイストリガの中のアプリケーションペイロードに含まれているアプリケーションデータに基づいて、IPアドレスをSCSへ通知する方法について説明する。
Claims (8)
- ネットワークを介して、所定の通信装置と通信を行う通信端末であって、
前記所定の通信装置から送信され、制御メッセージを前記通信端末へ送信することを要求するトリガ要求メッセージに基づいて生成された前記制御メッセージを前記ネットワークから受信する制御メッセージ受信部と、
前記所定の通信装置とIPパケットを使って前記通信をするか否かを判断する判断部と、
前記制御メッセージ受信部で前記制御メッセージを受信したとき、IPパケットを使って前記通信をすると判断した場合に、前記所定の通信装置との前記通信に使用するIPコネクションに割り当てられているIPアドレスを取得するコネクション管理部と、
前記制御メッセージに対する応答メッセージであって、前記コネクション管理部が取得した前記IPアドレスを含む応答メッセージを前記ネットワークに送信する応答メッセージ送信部とを、
有する通信端末。 - 前記コネクション管理部は、
前記IPアドレスを取得する際、前記IPコネクションが確立されていない場合に新たにIPコネクションを確立する請求項1に記載の通信端末。 - 前記応答メッセージ送信部は、
前記IPアドレスを、前記応答メッセージの中のアプリケーション情報を入れるためのフィールドに挿入する請求項1に記載の通信端末。 - 前記応答メッセージ送信部は、
前記制御メッセージの中にアプリケーションデータが含まれていない場合に、IPパケットを使って前記通信をすると判断する請求項1に記載の通信端末。 - 前記応答メッセージ送信部は、
前記所定の通信装置へ送信すべきアプリケーションデータを前記通信端末が有する場合に、IPパケットを使って前記通信をすると判断する請求項1に記載の通信端末。 - 通信端末とアプリケーションサーバとの通信を仲介するサーバであって、
前記アプリケーションサーバからデータを取得した際、制御メッセージを前記通信端末へ送信することを要求するトリガ要求をネットワークノードへ送信するトリガ要求送信部と、
前記トリガ要求に基づいて前記ネットワークから前記通信端末へ送信された前記制御メッセージに対する応答メッセージであって、前記通信端末のIPアドレスを含む応答メッセージを受信した前記ネットワークノードから前記IPアドレスを含むレポートメッセージを受信し、前記レポートメッセージの中に含まれる前記通信端末のIPアドレスを取得するレポート受信部と、
前記IPアドレスと前記通信端末の識別情報を関連付けて保持する通信端末情報保持部とを、
有するサーバ。 - 前記IPアドレスは、前記レポートメッセージのアプリケーション情報を入れるためのフィールドに挿入されている請求項6に記載のサーバ。
- 受信したIPパケットの送信元アドレスが、前記通信端末情報保持部に保持されているIPアドレスと一致する場合に、前記IPパケットに含まれているペイロードを前記アプリケーションサーバへ通知するIPパケット受信部を更に有する請求項6に記載のサーバ。
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