Emergency short message transmission method, registration method, equipment and storage medium

Abstract

The embodiment of the invention provides an emergency short message transmission method, a registration method, communication equipment and a computer readable storage medium. The method comprises the following steps: acquiring an emergency short message service center address of a service network; and constructing a first emergency short message according to the emergency short message service center address, and sending the first emergency short message.

Description

Emergency SMS transmission methods, registration methods, devices and storage media Technical Field

[0001] This application relates to the field of communication technology, and in particular to an emergency SMS transmission method, registration method, device, and computer-readable storage medium. Background Technology

[0002] In emergency SMS services, the service is jointly handled by the Short Message Service Center (SMSC) and the Public Safety Answering Point (PSAP). The SMSC used for emergency SMS services can be called the Emergency SMSC (E-SMSC). In roaming situations, due to regulatory requirements, the terminal's emergency SMS service must be handled by the Visited PLMN (VPLMN)'s Emergency SMSC and PSAP. However, based on current technology, emergency SMS services are difficult to support in visited networks. Summary of the Invention

[0003] This application provides an emergency SMS transmission method, a registration method, a device, and a computer-readable storage medium.

[0004] In a first aspect, embodiments of this application provide an emergency SMS transmission method, applied to a first communication node, comprising:

[0005] Obtain the address of the emergency SMS service center of the service network;

[0006] Based on the address of the emergency SMS service center, a first emergency SMS message is constructed and sent.

[0007] Secondly, embodiments of this application provide an emergency SMS transmission method, applied to a third communication node, comprising:

[0008] Receive a first emergency text message sent by a first communication node; wherein the first emergency text message includes the address of the emergency text message service center of the service network;

[0009] The first emergency SMS message is sent to the emergency SMS service center in the service network according to the address of the emergency SMS service center.

[0010] Thirdly, embodiments of this application provide a registration method applied to a second communication node, comprising:

[0011] Receive the network access request message from the first communication node;

[0012] Send a network access response message to the first communication node; wherein the network access response message includes emergency SMS service center information of the serving network.

[0013] Fourthly, embodiments of this application provide a communication device, including: a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the emergency SMS transmission method provided in the first or second aspect, or to implement the registration method provided in the third aspect.

[0014] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the emergency SMS transmission method provided in the first or second aspect, or implements the registration method provided in the third aspect.

[0015] Further details regarding the above embodiments and other aspects of this application, as well as their implementations, are provided in the accompanying drawings, detailed description, and claims. Attached Figure Description

[0016] Figure 1 is a network diagram of a traditional SMS system;

[0017] Figure 2 is a network diagram of a text messaging system provided in an embodiment of this application;

[0018] Figure 3 is a flowchart illustrating an emergency SMS transmission method provided in an embodiment of this application.

[0019] Figure 4 is another flowchart illustrating the emergency SMS transmission method provided in this application embodiment;

[0020] Figure 5 is a schematic flowchart of another emergency SMS transmission method provided in the embodiments of this application;

[0021] Figure 6 is a schematic diagram of an emergency call initiation SMS transmission process provided in an embodiment of this application;

[0022] Figure 7 is a schematic diagram of an emergency termination call SMS transmission process provided in an embodiment of this application;

[0023] Figure 8 is a flowchart illustrating a registration method provided in an embodiment of this application;

[0024] Figure 9 is a schematic diagram of a registration process in a 4G network provided in an embodiment of this application;

[0025] Figure 10 is a schematic diagram of a registration process in a 5G network provided in an embodiment of this application;

[0026] Figure 11 is a schematic diagram of an emergency SMS transmission device provided in an embodiment of this application;

[0027] Figure 12 is a schematic diagram of another structure of the emergency SMS transmission device provided in the embodiment of this application;

[0028] Figure 13 is a schematic diagram of a registration device provided in an embodiment of this application;

[0029] Figure 14 is a schematic diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] Current SMS services can be implemented based on various communication systems, such as 5G, 3GPP-related communication systems, 6G, and future evolution communication systems or systems integrating multiple systems. This application does not limit this.

[0032] For example, taking a non-access stratum (NAS) based SMS system in a 4G / 5G network as an example, as shown in Figure 1, the SMS system may include: User Equipment (UE), core network, and emergency SMS service domain. The UE interacts with the emergency SMS service domain via the core network. The relevant components of the 4G core network include the Mobility Management Entity (MME) and the Home Subscriber Server (HSS). The MME processes the UE's NAS signaling, and the HSS stores user subscription data (such as SMS permissions). The S1-AP interface is the control plane interface between the UE and the MME, the S6a interface is the interface between the MME and the HSS for exchanging user subscription and authentication data, and the SGd interface is the interface between the MME and the SMSC. The relevant components involved in the 5G core network include the Access and Mobility Management Function (AMF), which handles NAS signaling for the UE; the Unified Data Management (UDM), which stores user data; and the SMS Function (SMSF), a new network element in the 5G core network that directly interfaces with the Emergency SMS Service Domain to optimize SMS routing. The N1 interface is the signaling plane interface between the UE and the AMF. The Emergency SMS Service Domain can include a SMS gateway, SMSC, and PSAP. The SMS gateway is responsible for SMS routing and forwarding. The SMS gateway can be a Short Message Service Gateway Mobile Switching Center (SMS-GMSC), an Interworking Mobile Switching Center (IWMSC), or a Short Message Service Router (SMS Router). The SMSC used to handle emergency SMS services can also be called an Emergency SMSC. The Emergency SMSC and PSAP jointly handle emergency SMS services.

[0033] Typically, emergency SMS services are handled jointly by the Emergency SMSC and PSAP. In the emergency originating SMS process, the Emergency SMSC needs to forward the emergency originating SMS to the PSAP. In roaming situations, due to regulatory requirements, the UE's emergency SMS service must be handled by the VPLMN's Emergency SMSC and PSAP. However, according to current technologies, emergency SMS services are difficult to support in VPLMNs. Therefore, as shown in Figure 2, this embodiment adds an Emergency SMS Interworking (ESIWF) function to the existing SMS system to assist the UE in sending Emergency Originating SMS (Emergency MO SMS) to the VPLMN's Emergency SMSC in roaming situations, and to assist the Emergency SMSC in sending Emergency Terminating SMS (Emergency MT SMS) to the UE. The ESIWF can be deployed as an independent function or integrated with core network elements; this embodiment does not limit this. For example, when deploying ESIWF in a 4G network, ESIWF can be deployed as a standalone function, or it can be deployed in conjunction with an SMS gateway (such as SMS-GMSC / SMS-IWMSC / SMS Router), or it can be deployed in conjunction with an MME. When deploying ESIWF in a 5G network, ESIWF can be deployed as a standalone function, or it can be deployed in conjunction with a specific SMSF, or it can be deployed in conjunction with an SMS gateway (such as SMS-GMSC / SMS-IWMSC / SMS Router), or it can be deployed in conjunction with an AMF.

[0034] Figure 3 is a flowchart illustrating an emergency SMS transmission method provided in an embodiment of this application. The method is applied to a first communication node, which, exemplarily, can be a UE (User Equipment). The second communication node can be an MME or an AMF (where the serving network is a 4G network, the second communication node is an MME; where the serving network is a 5G network, the second communication node is an AMF). The third communication node can be an ESIWF (Environmentally Secure Wire Service). As shown in Figure 3, the method may include:

[0035] S301. Obtain the address of the emergency SMS service center of the service network.

[0036] S302. Based on the address of the emergency SMS service center, construct the first emergency SMS and send the first emergency SMS.

[0037] Specifically, the serving network refers to the network currently accessed by the first communication node. In roaming mode, the serving network is the visited network of the first communication node; in non-roaming mode, the serving network is the home network of the first communication node. The emergency SMS service center address points to the emergency SMS service center of the serving network. Optionally, the emergency SMS service center address can be the Mobile Station International Subscriber Directory Number (MSISDN) of the emergency SMS service center, and may include a country code. For example, the emergency SMS service center address can be the country code + the MSISDN of the emergency SMS service center. Optionally, the emergency SMS service center address can also be the international code + emergency call short number (e.g., +86110).

[0038] In some implementations, the first communication node can obtain the emergency SMS service center address of the service network during interaction with the service network, and store the obtained emergency SMS service center address in a Subscriber Identity Module (SIM) or Universal Subscriber Identity Module (USIM) card. When a first emergency SMS message needs to be sent, the first communication node can obtain the emergency SMS service center address of the service network from the SIM card or USIM card, construct the first emergency SMS message based on the emergency SMS service center address, encapsulate the first emergency SMS message as a NAS message, and send the first emergency SMS message to the second communication node through the control plane. The second communication node determines the sending method of the first emergency SMS message based on the state of the first communication node. For the first communication node in roaming mode (where the serving network is the visited network), the second communication node forwards the first emergency SMS to the third communication node. The third communication node parses the first emergency SMS, obtains the address of the emergency SMS service center of the visited network, and routes the first emergency SMS to the emergency SMS service center of the visited network based on the address. This route then routes the first emergency SMS to the PSAP of the visited network, enabling processing of the first emergency SMS within the visited network and preventing it from being incorrectly routed to the home network. For the first communication node in non-roaming mode (where the serving network is the home network), the second communication node sends the first emergency SMS to the SMS routing gateway, which then forwards it to the home network.

[0039] Optionally, the first emergency SMS message can be an Emergency MOSMS sent by the first communication node. In some examples, the Emergency MOSMS may also be called an Emergency SMS (MO Emergency SMS), which is not limited in this embodiment.

[0040] In this embodiment, in roaming mode, the first communication node can construct and send a first emergency SMS based on the address of the emergency SMS service center of the visited network, so that the first emergency SMS can be routed to the emergency service center of the visited network, avoiding the first emergency SMS being incorrectly routed to the home network, thereby improving the response efficiency of emergency SMS in roaming mode.

[0041] Optionally, constructing the first emergency SMS message based on the emergency SMS service center address includes: the emergency SMS service center address is filled into the relay protocol target address field of the first emergency SMS message. That is, the first communication node fills the obtained emergency SMS service center address into the relay protocol target address field of the first emergency SMS message. Then, after receiving the first emergency SMS message, the third communication node reads the content of the relay protocol target address field of the first emergency SMS message to obtain the emergency SMS service center address, and thus correctly routes the first emergency SMS message to the emergency SMS service center of the serving network based on the emergency SMS service center address. For example, in roaming mode, when it is necessary to send the first emergency SMS message, the first communication node can fill the emergency SMS service center address of the visited network into the relay protocol target address field of the first emergency SMS message to construct the first emergency SMS message and send it. After receiving the first emergency SMS message, the third communication node can read the emergency SMS service center address from the relay protocol target address field of the first emergency SMS message and correctly route the first emergency SMS message to the emergency SMS service center of the visited network based on the emergency SMS service center address, thereby improving the response speed of emergency SMS messages in roaming mode.

[0042] Optionally, obtaining the emergency SMS service center address of the service network includes: receiving emergency SMS service center information of the service network during the registration process; and determining the emergency SMS service center address of the service network based on the emergency SMS service center information.

[0043] The first communication node can initiate a registration process with the second communication node within the serving network. During the registration process, the second communication node can determine, based on its local policy, whether it needs to send the emergency SMS service center information of the serving network to the first communication node. For example, in roaming mode, the second communication node can send the emergency SMS service center information of the serving network (which is the visited network in roaming mode) to the first communication node. In non-roaming mode, the second communication node may choose not to send the emergency SMS service center information of the serving network, or it may send the emergency SMS service center information of the first communication node's home network (which is the home network in non-roaming mode) to the first communication node. Based on the received emergency SMS service center information of the serving network, the first communication node generates an emergency SMS service center address and stores it.

[0044] Optionally, the emergency text messaging service center information includes at least one of the following: emergency text messaging service center address, Public Land Mobile Network Identifier (PLMN ID) of the service network, list of emergency call numbers, and emergency text messaging service center construction instructions.

[0045] The emergency SMS service center address can be an MSISDN and may include a country code. For example, the emergency SMS service center address received by the first communication node can be: country code + emergency SMS service center MSISDN, or: international code + emergency call short number (e.g., +86110).

[0046] The PLMN ID of the service network is used to indicate the PLMN to which the emergency SMS service center belongs.

[0047] The emergency call number list can contain multiple records, and each record can include an emergency service type and the emergency call number corresponding to that emergency service type.

[0048] The Emergency SMS Service Center Construction Instruction is used to indicate how the Emergency SMS Service Center address is constructed.

[0049] Optionally, the address of the emergency SMS service center for the service network can be determined based on the emergency SMS service center information in one of the following ways:

[0050] Method 1: If the emergency SMS service center information includes an emergency SMS service center address, the received emergency SMS service center address will be identified as the emergency SMS service center address of the service network.

[0051] Method 2: If the emergency SMS service center information includes a list of emergency call numbers and an emergency SMS service center construction instruction, determine the emergency SMS service center address of the service network based on the emergency SMS service center construction instruction and the list of emergency call numbers.

[0052] The first communication node constructs the emergency SMS service center address of the service network based on the emergency SMS service center construction instruction and the emergency call numbers in the emergency call number list. For example, the first communication node can determine the emergency call number as the emergency SMS service center address based on the emergency SMS service center construction instruction. For instance, if the emergency call number received by the first communication node is +86110, then that emergency call number can be determined as the emergency SMS service center address. If the emergency call number list contains multiple emergency call numbers, the first communication node can randomly select one emergency call number to generate the emergency SMS service center address, or it can construct a corresponding emergency SMS service center address for each emergency call number based on the emergency SMS service center construction instruction. The multiple emergency SMS service center addresses obtained are equivalent and can all point to the emergency SMS service center of the service network.

[0053] Method 3: If the emergency SMS service center information includes a list of emergency call numbers, determine the address of the emergency SMS service center of the service network based on the list of emergency call numbers.

[0054] In this scenario, the first communication node constructs the emergency SMS service center address of the service network based on the emergency call numbers in the emergency call number list, according to its local policy. Optionally, the first communication node can determine the emergency call number in the emergency call number list as the emergency SMS service center address of the service network. For example, if the emergency call number received by the first communication node is +86110, it can determine that emergency call number as the emergency SMS service center address. If the emergency call number list contains multiple emergency call numbers, the first communication node can randomly select one emergency call number to generate the emergency SMS service center address, or it can construct a corresponding emergency SMS service center address for each emergency call number. The multiple emergency SMS service center addresses obtained are equivalent and can all point to the emergency SMS service center of the service network.

[0055] After obtaining the address of the emergency SMS service center of the service network, the first communication node can associate and store the address of the emergency SMS service center of the service network with the PLMD ID.

[0056] Specifically, the first communication node associates the emergency SMS service center address and PLMD ID as Short Message Service Parameters (SMSPs) and stores them in the local SIM / USIM card. If the first communication node constructs multiple emergency service center addresses based on emergency call numbers in the emergency call number list, it can store multiple emergency SMS service center addresses in the SMSSP parameters. When the first emergency SMS needs to be sent, the first communication node can randomly select an emergency SMS service center address from the SMSSP parameters to construct the first emergency SMS, ensuring that the first emergency SMS is correctly routed to the emergency SMS service center in the service network.

[0057] In this embodiment, the first communication node can obtain the emergency SMS service center information of the serving network during the registration process. For example, in roaming mode, the first communication node can obtain the emergency SMS service center information of the visited network through the registration process. In this way, if the first communication node needs to send the first emergency SMS while roaming, it can construct the first emergency SMS based on the emergency SMS service center address of the visited network, so that the first emergency SMS can be correctly routed to the emergency SMS service center of the visited network, avoiding being incorrectly routed to the home network, thus improving the response efficiency of emergency SMS. In addition, based on the emergency SMS service center information issued by the network, the emergency SMS service center address can be constructed in multiple ways, which improves the flexibility of emergency SMS service center address construction.

[0058] Optionally, receiving emergency SMS service center information from the service network during the registration process may include: sending a network access request message to the second communication node; receiving a network access response message sent by the second communication node; wherein the network access response message includes emergency SMS service center information from the service network.

[0059] Specifically, the first communication node can obtain the emergency SMS service center information of the service network from the service network through the registration process. That is, after the first communication node is authenticated, the second communication node can send the emergency SMS service center information of the service network to the first communication node. In the absence of a SIM / USIM card, the first communication node can also obtain the emergency SMS service center information of the service network from the service network through the emergency registration process.

[0060] Optionally, when the serving network is a 4G network, the aforementioned network access request message is an attach request message, and the network access response message is an attach response message. When the serving network is a 5G network, the network access request message is a registration request message, and the network access response message is a registration response message. When the serving network is a communication network of other standards, the network access request message and the network access response message may also have other names, and this embodiment does not limit them.

[0061] Figure 4 is a schematic diagram of another emergency SMS transmission method provided in an embodiment of this application. This method is applied to a third communication node. For example, the first communication node can be a UE, the second communication node can be an MME or an AMF (in the case of a 4G network, the second communication node is an MME; in the case of a 5G network, the second communication node is an AMF), and the third communication node can be an ESIWF. As shown in Figure 4, the method may include:

[0062] S401, Receive the first emergency text message sent by the first communication node.

[0063] The first emergency text message includes the address of the emergency text message service center of the service network.

[0064] S402. Send the first emergency SMS to the emergency SMS service center in the service network according to the address of the emergency SMS service center.

[0065] Specifically, the serving network refers to the network currently accessed by the first communication node. In roaming mode, the serving network is the visited network of the first communication node; in non-roaming mode, the serving network is the home network of the first communication node. The emergency SMS service center address points to the emergency SMS service center of the serving network. Optionally, the emergency SMS service center address can be the MSISDN of the emergency SMS service center, and may include a country code. For example, the emergency SMS service center address can be the country code + the MSISDN of the emergency SMS service center. Optionally, the emergency SMS service center address can also be an international number + an emergency call short number (e.g., +86110).

[0066] In some implementations, the first communication node can obtain the emergency SMS service center address of the serving network during interaction with the serving network and store the obtained emergency SMS service center address in the SIM / USIM card. When it is necessary to send a first emergency SMS, the first communication node can obtain the emergency SMS service center address of the serving network from the SIM / USIM card, construct the first emergency SMS based on the emergency SMS service center address, encapsulate the first emergency SMS as a NAS message, and send the first emergency SMS to the second communication node through the control plane. The second communication node determines the sending method of the first emergency SMS based on the state of the first communication node. For the first communication node in roaming mode, in this case, the serving network is the visited network. The second communication node forwards the first emergency SMS to the third communication node. The third communication node parses the first emergency SMS, obtains the emergency SMS service center address of the visited network, and routes the first emergency SMS to the emergency SMS service center of the visited network based on the emergency SMS service center address, and then routes it to the PSAP of the visited network, so as to realize the processing of the first emergency SMS in the visited network and avoid the first emergency SMS being incorrectly routed to the home network.

[0067] Optionally, the first emergency SMS can be an Emergency MO SMS sent by the first communication node.

[0068] In this embodiment, the third communication node receives the first emergency SMS message from the first communication node. Based on the emergency SMS service center address in the first emergency SMS message, the third communication node correctly routes the first emergency SMS message to the emergency SMS service center of the serving network. That is, in roaming mode, this method enables the first emergency SMS message of the first communication node to be routed to the emergency service center of the visited network, avoiding the first emergency SMS message being incorrectly routed to the home network, thereby improving the response efficiency of emergency SMS messages.

[0069] Optionally, as shown in Figure 5, the method may further include:

[0070] S501: Receive the second emergency SMS sent by the emergency SMS service center to the first communication node.

[0071] S502, Determine the second communication node that is currently serving the first communication node.

[0072] S503. Send a second emergency text message to the first communication node through the determined second communication node.

[0073] Optionally, the second emergency SMS can be an Emergency MT SMS sent by the Emergency SMS Service Center, which depends on the communication context established by the Emergency Originating SMS. In some examples, the Emergency MT SMS may also be called an Emergency MT SMS, which is not limited in this embodiment. After receiving the second emergency SMS sent to the first communication node, the third communication node can determine the second communication node currently serving the first communication node by combining the location information of the first communication node, and send the second emergency SMS to the determined second communication node. Thus, the second emergency SMS is correctly delivered to the first communication node through the second communication node, improving the success rate of sending the second emergency SMS.

[0074] In some implementations, the third communication node may also store the identifier of the first communication node and the identifier of the second communication node serving the first communication node during interactions with other communication nodes. Optionally, upon receiving the second emergency SMS message, the third communication node may determine the second communication node currently serving the first communication node based on the stored information of the first and second communication node identifiers. For example, the third communication node may determine the second communication node currently serving the first communication node from the stored information of the first and second communication node identifiers based on the identifier of the first communication node carried in the second emergency SMS message.

[0075] Optionally, the third communication node obtains the identifier of the first communication node and the identifier of the second communication node serving the first communication node through at least one of the following methods:

[0076] Method 1: During the registration process of the first communication node, receive the identifiers of the first and second communication nodes sent by the second communication node.

[0077] The first communication node registers in the service network. After successful registration, the second communication node can send the identifiers of the first and second communication nodes to the third communication node. The third communication node receives and stores the identifiers of the first and second communication nodes. If the third communication node has stored the identifiers of the first and second communication nodes, it can update the previously stored identifiers of the first and second communication nodes based on the newly received identifiers, thus supporting the subsequent sending of a second emergency SMS message.

[0078] Method 2: During the first emergency SMS transmission process, learn the identifiers of the first and second communication nodes.

[0079] In this process, the third communication node receives the first emergency SMS message sent by the first communication node through the second communication node. Therefore, during the transmission of the first emergency SMS message, the third communication node can learn the identifier of the second communication node serving the first communication node. That is, the third communication node learns / acquires the identifier of the first communication node and the identifier of the second communication node serving the first communication node through the transmission process of the first emergency SMS message, and stores the identifiers of the first and second communication nodes. If the third communication node has stored the identifiers of the first and second communication nodes, it can update the previously stored identifiers of the first and second communication nodes based on the identifiers of the first and second communication nodes learned / acquired this time, thus supporting the subsequent sending of the second emergency SMS message.

[0080] The emergency SMS transmission method provided in the above embodiments of this application is described below with reference to some exemplary implementation methods. In the following exemplary implementation methods, the first communication node is referred to as UE, the second communication node is referred to as MME or AMF, and the third communication node is referred to as ESIWF.

[0081] In the first exemplary embodiment, the transmission process of the emergency initiation SMS (i.e., the first emergency SMS in the above embodiment) in a roaming scenario is described, as shown in Figure 6. This process may include:

[0082] S601, the UE sends a NAS Transport Request to the MME / AMF, which includes an Originating Call SMS in the NAS data packet.

[0083] The originating SMS can include regular originating SMS and emergency originating SMS. When the UE needs to send an Emergency MO SMS, the UE can fill in the address of the emergency SMS service center of the serving network in the Relay Protocol Destination field of the SMS data packet (RP-DATA).

[0084] S602 and MME / AMF determine the routing method for MO SMS.

[0085] Optionally, the MME / AMF can determine the routing method for the MO SMS based on the UE's status. For example, for a roaming UE, the MME / AMF sends the MO SMS to the ESIWF. For a non-roaming UE, the MME / AMF can send the MO SMS to a short message routing gateway (e.g., an SMS router) using a normal SMS routing method, which in turn sends the MO SMS to the Short Message Service Center (SMSC) of the UE's home network.

[0086] S603, MME / AMF sends SMS delivery request to ESIWF.

[0087] The SMS delivery request carries the UE's MO SMS, which means that the roaming UE's MO SMS is delivered to the ESIWF.

[0088] S604 and ESIWF determine the routing method for MO SMS.

[0089] The ESIWF checks whether the MO SMS is an Emergency MO SMS to determine its routing method. Specifically, the ESIWF reads the Relay Protocol Destination (RP-Destination) field in the MO SMS header. If it points to an emergency SMS service center address (such as 110 or +86110), it indicates that the MO SMS is an emergency MO SMS, and the ESIWF decides to deliver it to the corresponding emergency SMS service center within the network. Otherwise, the ESIWF processes the MO SMS as a regular SMS, delivering it to the SMS routing gateway, which then further delivers the MO SMS to the SMS service center of the UE's home network.

[0090] S605. If the UE is in roaming mode and the UE sends an emergency call start SMS, the ESIWF sends an SMS delivery request to the Emergency SMS Service Center (E-SMSC) of this network (i.e., the network visited by the UE). The SMS delivery request carries the UE's emergency call start SMS, thereby delivering the UE's emergency call start SMS to the E-SMSC.

[0091] If the visited network is a 4G network, the ESIWF can deliver the UE's emergency call initiation SMS to the E-SMSC.

[0092] If the visited network is a 5G network, the ESIWF can deliver the UE's emergency call origination SMS to the SMSF, and then the SMSF will deliver the UE's emergency call origination SMS to the E-SMSC.

[0093] S606, E-SMSC sends an SMS Delivery Request to PSAP, which carries the UE's emergency call originating SMS, thereby sending the emergency call originating SMS to PSAP.

[0094] S607. PSAP returns an SMS delivery response to E-SMSC, which includes an SMS delivery report.

[0095] The SMS delivery report is used to indicate the transmission status of emergency call SMS messages, i.e., whether the emergency call SMS message sent by the UE has been successfully received.

[0096] S608, E-SMSC returns a text message delivery response to ESIWF, which includes a text message delivery report.

[0097] S609, ESIWF returns a text message delivery response to MME / AMF, which includes a text message delivery report.

[0098] S610 and MME / AMF return a NAS Transport Response to the UE, which includes a text message delivery report.

[0099] S611 and ESIWF can learn the pairing relationship between UE ID and MME ID (or AMF ID) during the initial call SMS transmission. That is, when the serving network is a 4G network, it learns and stores the UE ID and the MME ID serving the UE, and when the serving network is a 5G network, it learns and stores the UE ID and the AMF ID serving the UE.

[0100] In the second exemplary embodiment, the transmission process of the emergency final call SMS (i.e., the second emergency SMS in the above embodiment) in a roaming scenario is described, as shown in Figure 7. This process may include:

[0101] S701, PSAP sends an SMS Delivery Request to the E-SMSC, which includes an Emergency MT SMS to be sent to the UE.

[0102] S702, E-SMSC sends a text message delivery request to ESIWF, which includes an emergency termination call text message.

[0103] S703 and ESIWF determine the routing method for emergency termination call SMS messages.

[0104] ESIWF determines the MME / AMF currently serving the UE based on the UE ID stored during the UE's registration process or emergency call SMS transmission process and the MMEID (or AMF ID) serving the UE.

[0105] S704 and ESIWF send a text message delivery request to the designated MME / AMF, which includes an emergency termination call text message.

[0106] S705 and MME / AMF send a NAS Transport Request to the UE, which includes an emergency termination call SMS.

[0107] S706, the UE sends a NAS transport response to the MME / AMF, which includes an SMS delivery report in the NAS data packet.

[0108] In this example, the SMS delivery report is used to indicate the transmission status of the emergency termination SMS, i.e., whether the emergency termination SMS sent by PSAP was successfully received.

[0109] S707 and MME / AMF send SMS delivery response to ESIWF, which includes an SMS delivery report.

[0110] S708 and ESIWF send SMS delivery response to E-SMSC, which includes an SMS delivery report.

[0111] If the visited network is a 4G network, the ESIWF can deliver the SMS delivery response to the E-SMSC.

[0112] If the visited network is a 5G network, the ESIWF can deliver the SMS delivery response to the SMSF, which in turn delivers the SMS delivery response to the E-SMSC.

[0113] S709, E-SMSC sends a text message delivery response to PSAP, which includes a text message delivery report.

[0114] Figure 8 is a schematic flowchart of a registration method provided in an embodiment of this application. This method is applied to a second communication node. Exemplarily, the first communication node can be a UE, and the second communication node can be an MME or an AMF. When the serving network is a 4G network, the second communication node is an MME; when the serving network is a 5G network, the second communication node is an AMF. As shown in Figure 8, the method may include:

[0115] S801, Receive the network access request message from the first communication node.

[0116] S802, Send a network access response message to the first communication node; wherein the network access response message includes the emergency SMS service center information of the serving network.

[0117] Specifically, the serving network refers to the network that the first communication node is currently connected to. In roaming mode, the serving network is the visited network of the first communication node, and in non-roaming mode, the serving network is the home network of the first communication node.

[0118] The first communication node can initiate a registration process with the second communication node in the service network. This registration process can be a normal registration process or an emergency registration process. The normal registration process can be triggered by the first communication node upon initial power-on or network selection, or by network switching, or by entering a new tracking area, or by other reasons. The emergency registration process can be triggered when the first communication node needs to initiate emergency services.

[0119] During the registration process, the second communication node can determine whether to send the emergency SMS service center information of the service network to the first communication node based on local policies. For example, in roaming mode, the second communication node can send the emergency SMS service center information of the service network (which is the visited network in roaming mode) to the first communication node. In non-roaming mode, the second communication node may choose not to send the emergency SMS service center information of the service network, or it may send the emergency SMS service center information of the first communication node's home network (which is the home network in non-roaming mode) to the first communication node. Based on the received emergency SMS service center information of the service network, the first communication node generates an emergency SMS service center address and stores it.

[0120] Optionally, the emergency SMS service center information includes at least one of the following: emergency SMS service center address, PLMN ID of the service network, list of emergency call numbers, and emergency SMS service center construction instructions.

[0121] The emergency SMS service center address can be an MSISDN and may include a country code. For example, the emergency SMS service center address received by the first communication node can be: country code + emergency SMS service center MSISDN, or: international code + emergency call short number (e.g., +86110).

[0122] The PLMN ID of the service network is used to indicate the PLMN to which the emergency SMS service center belongs.

[0123] The emergency call number list can contain multiple records, and each record can include an emergency service type and the emergency call number corresponding to that emergency service type.

[0124] The Emergency SMS Service Center Construction Instruction is used to indicate how the Emergency SMS Service Center address is constructed.

[0125] Optionally, when the serving network is a 4G network, the aforementioned network access request message is an attach request message, and the network access response message is an attach response message. When the serving network is a 5G network, the network access request message is a registration request message, and the network access response message is a registration response message. When the serving network is a communication network of other standards, the network access request message and the network access response message may also have other names, and this embodiment does not limit them.

[0126] Optionally, after the first communication node successfully registers, the second communication node can also send the pairing information between the identifiers of the first and second communication nodes to the third communication node.

[0127] The registration method provided in the above embodiments of this application is described below with reference to some exemplary implementation methods. In one exemplary implementation method, taking a 4G network as the serving network, a UE as the first communication node, an MME as the second communication node, and an ESIWF as the third communication node as an example, as shown in Figure 9, the registration method may include:

[0128] S901, the UE sends an attach request to the MME.

[0129] S902, MME sends a location update request to HSS.

[0130] S903, HSS sends a location update response to MME.

[0131] The location update response carries the UE's subscription data.

[0132] Optionally, in the emergency registration process initiated by the UE, S904 can be executed directly after S901 is completed.

[0133] S904, MME determines whether to send emergency SMS service center information of the serving network to UE.

[0134] The MME can determine whether to send Emergency SMS Service Center information to the UE based on local policies (e.g., network policies or carrier policies). For example, when the UE is roaming, the serving network is the visited network, and the MME can send the visited network's Emergency SMS Service Center information to the UE; when the UE is not roaming, the serving network is the home network, and as an optional implementation, the MME may not send the home network's Emergency SMS Service Center information to the UE. As another optional implementation, the MME may send the home network's Emergency SMS Service Center information to the UE.

[0135] The specific content of the emergency SMS service center information can be referred to the description in the above embodiments, and will not be repeated here.

[0136] S905, MME sends an attach response message to UE.

[0137] The attach response message includes information about the emergency SMS service center of the serving network. Optionally, if the UE attaches successfully, the attach response message can be an attach receive message.

[0138] S906. After receiving the attach response message, the UE generates an emergency SMS service center address based on the emergency SMS service center information and stores the emergency SMS service center address.

[0139] It should be noted that the process by which the UE generates the emergency SMS service center address based on the emergency SMS service center information can be referred to the description in the above embodiments, and will not be repeated in this embodiment.

[0140] S907 and MME send an update request to ESIWF.

[0141] The update request includes the UE ID and the MME ID serving the UE.

[0142] S908 and ESIWF reply with an update response to MME.

[0143] ESIWF stores the UE ID and the MME ID serving the UE. If the UE ID and MME ID were previously stored, they can be updated according to this update request.

[0144] In another exemplary embodiment, taking a 5G network as the serving network, a UE as the first communication node, an AMF as the second communication node, and an ESIWF as the third communication node as an example, as shown in Figure 8, the registration method may include:

[0145] S1001, the UE sends a registration request to the AMF.

[0146] S1002, AMF sends a Subscription Retrieval Request to UDM.

[0147] S1003, UDM returns a Subscription Retrieval Response to AMF.

[0148] The response for obtaining contract data includes the user's contract data.

[0149] Optionally, in the emergency registration process initiated by the UE, S1004 can be executed directly after S1001 is completed.

[0150] S1004, AMF determines whether to send emergency SMS service center information of the serving network to the UE.

[0151] The AMF (Automatic Message Service Center) can determine whether to send Emergency Message Service Center information to the UE based on local policies (e.g., network policies or operator policies). For example, when the UE is roaming, the serving network is the visited network, and the AMF can send the visited network's Emergency Message Service Center information to the UE. When the UE is not roaming, the serving network is the home network. As an optional implementation, the AMF may not send the home network's Emergency Message Service Center information to the UE; as another optional implementation, the AMF may also send the home network's Emergency Message Service Center information to the UE.

[0152] S1005, AMF sends a Registration Accept message to UE. This Registration Accept message carries information about the Emergency SMS Service Center of the serving network.

[0153] S1006. After receiving the registration message, the UE generates an emergency SMS service center address based on the emergency SMS service center information and stores the emergency SMS service center address.

[0154] It should be noted that the process by which the UE generates the emergency SMS service center address based on the emergency SMS service center information can be referred to the description in the above embodiments, and will not be repeated in this embodiment.

[0155] S1007. AMF sends an AMF Registration Request to UDM.

[0156] S1008, UDM processes the AMF registration request and returns an AMF registration response to the AMF.

[0157] UDM stores AMF information in the UE context.

[0158] S1009, AMF sends an update request to ESIWF.

[0159] The update request includes the UE ID and the AMF ID serving the UE.

[0160] It should be noted that there is no restriction on the order of S1007 and S1009.

[0161] S1010 and ESIWF reply with an update response to AMF.

[0162] ESIWF stores the UE ID and AMF ID. If the UE ID and AMF ID were previously stored, they can be updated according to this update request.

[0163] Figure 11 is a schematic diagram of an emergency SMS transmission device provided in an embodiment of this application. The device is integrated into a first communication node. As shown in Figure 11, the device may include: an acquisition module 1101, a processing module 1102, and a sending module 1103.

[0164] Specifically, module 1101 is used to obtain the address of the emergency SMS service center of the service network;

[0165] Processing module 1102 is used to construct a first emergency SMS based on the address of the emergency SMS service center;

[0166] The sending module 1103 is used to send the first emergency text message.

[0167] Optionally, based on the above embodiments, the acquisition module 1101 is further configured to receive emergency SMS service center information of the service network during the registration process; and determine the address of the emergency SMS service center of the service network based on the emergency SMS service center information.

[0168] Based on the above embodiments, the emergency SMS service center information may optionally include at least one of the following:

[0169] Address of Emergency SMS Service Center;

[0170] The PLMN ID of the service network;

[0171] List of emergency call numbers;

[0172] Emergency SMS service center setup instructions.

[0173] Based on the above embodiments, optionally, the acquisition module 1101 is further used for at least one of the following:

[0174] If the emergency SMS service center information includes an emergency SMS service center address, the received emergency SMS service center address will be identified as the emergency SMS service center address of the service network.

[0175] When the emergency SMS service center information includes a list of emergency call numbers and an emergency SMS service center construction instruction, the emergency SMS service center address of the service network is determined based on the emergency SMS service center construction instruction and the list of emergency call numbers.

[0176] If the emergency SMS service center information includes a list of emergency call numbers, the address of the emergency SMS service center for the service network is determined based on the list of emergency call numbers.

[0177] Optionally, based on the above embodiments, the acquisition module 1101 is further configured to determine the emergency call numbers in the emergency call number list as the address of the emergency SMS service center of the service network.

[0178] Optionally, based on the above embodiments, the processing module 1102 is further configured to associate and store the emergency SMS service center address and PLMD ID of the service network.

[0179] Optionally, based on the above embodiments, the acquisition module 1101 is further configured to send a network access request message to the second communication node; and receive a network access response message sent by the second communication node; wherein the network access response message includes emergency SMS service center information of the serving network.

[0180] Optionally, when the serving network is a 4G network, the network access request message is an attach request message, and the network access response message is an attach response message.

[0181] Optionally, when the serving network is a 5G network, the network access request message is a registration request message, and the network access response message is a registration response message.

[0182] Optionally, the emergency SMS service center address is populated into the relay protocol target address field of the first emergency SMS.

[0183] Figure 12 is a schematic diagram of another structure of the emergency SMS transmission device provided in an embodiment of this application. The device is integrated into a third communication node. As shown in Figure 12, the device includes a receiving module 1201 and a sending module 1202.

[0184] Specifically, the receiving module 1201 is used to receive a first emergency text message sent by the first communication node; wherein, the first emergency text message includes the address of the emergency text message service center of the service network;

[0185] The sending module 1202 is used to send the first emergency SMS to the emergency SMS service center in the service network according to the address of the emergency SMS service center.

[0186] Optionally, based on the above embodiments, the device further includes a processing module.

[0187] Specifically, the receiving module 1201 is also used to receive a second emergency SMS sent by the emergency SMS service center to the first communication node;

[0188] The processing module is used to determine the second communication node that is currently serving the first communication node;

[0189] The sending module 1202 is also used to send a second emergency text message to the first communication node through the second communication node.

[0190] Based on the above embodiments, optionally, the processing module is further configured to store the identifier of the first communication node and the identifier of the second communication node serving the first communication node;

[0191] Optionally, the above processing module is further configured to determine the second communication node currently serving the first communication node based on the stored information of the identifier of the first communication node and the identifier of the second communication node.

[0192] Optionally, the identifier of the first communication node and the identifier of the second communication node serving the first communication node are obtained by at least one of the following: during the registration process of the first communication node, receiving the identifier of the first communication node and the identifier of the second communication node sent by the second communication node;

[0193] During the first emergency SMS transmission, the identifiers of the first and second communication nodes are learned.

[0194] Figure 13 is a schematic diagram of a registration device provided in an embodiment of this application. The device is integrated into a second communication node. As shown in Figure 13, the device may include a receiving module 1301 and a sending module 1302.

[0195] Specifically, the receiving module 1301 is used to receive the network access request message from the first communication node;

[0196] The sending module 1302 is used to send a network access response message to the first communication node; wherein the network access response message includes emergency SMS service center information of the serving network.

[0197] Based on the above embodiments, the emergency SMS service center information may optionally include at least one of the following:

[0198] Address of Emergency SMS Service Center;

[0199] The PLMN ID of the service network;

[0200] List of emergency call numbers;

[0201] Emergency SMS service center setup instructions.

[0202] Based on the above embodiments, optionally, when the serving network is a 4G network, the network access request message is an attach request message and the network access response message is an attach response message.

[0203] Based on the above embodiments, optionally, when the serving network is a 5G network, the network access request message is a registration request message and the network access response message is a registration response message.

[0204] Based on the above embodiments, optionally, the sending module 1302 is further configured to send the identifier of the first communication node and the identifier of the second communication node to the third communication node.

[0205] In one embodiment, a communication device is also provided. This communication device can be the first communication node, second communication node, or third communication node described in the above embodiments. The internal structure of the communication device is shown in Figure 14. The communication device includes a processor, memory, network interface, and database connected via a system bus. The processor of the communication device provides computing and control capabilities. The memory of the communication device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database of the communication device stores data generated during the emergency SMS transmission or registration process. The network interface of the communication device is used to communicate with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps of the emergency SMS transmission method or registration method provided in any of the above embodiments.

[0206] Those skilled in the art will understand that the structure shown in Figure 14 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the communication device to which the present application is applied. Specific communication devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0207] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the emergency SMS transmission method or registration method provided in any of the above embodiments.

[0208] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. Computer-readable storage media include (a non-exhaustive list): electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), electrically erasable, programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this application, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0209] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, the data signals carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0210] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical fiber, radio frequency (RF), or any suitable combination thereof.

[0211] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination of programming languages, including object-oriented programming languages ​​(such as Java, Smalltalk, C++, Ruby, and Go) and conventional procedural programming languages ​​(such as the "C" language or similar programming languages). The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network (including a Local Area Network (LAN) or a Wide Area Network (WAN)), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0212] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.

[0213] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0214] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0215] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored in memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Multifunction Discs, DVDs, or CDs), etc. Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

Claims

1. A method for transmitting emergency text messages, characterized in that, Applied to a first communication node, the method includes: obtaining the address of the emergency SMS service center of the service network; constructing a first emergency SMS message based on the emergency SMS service center address; and sending the first emergency SMS message.

2. The method according to claim 1, characterized in that, The step of obtaining the emergency SMS service center address of the service network includes: receiving emergency SMS service center information of the service network during the registration process; and determining the emergency SMS service center address of the service network based on the emergency SMS service center information.

3. The method according to claim 2, characterized in that, The emergency SMS service center information includes at least one of the following: emergency SMS service center address; Public Land Mobile Network ID (PLMN ID) of the service network; List of emergency call numbers; instructions for setting up an emergency SMS service center.

4. The method according to claim 3, characterized in that, Determining the emergency SMS service center address of the service network based on the emergency SMS service center information includes at least one of the following: when the emergency SMS service center information includes an emergency SMS service center address, the received emergency SMS service center address is determined as the emergency SMS service center address of the service network; If the emergency SMS service center information includes an emergency call number list and an emergency SMS service center construction instruction, the emergency SMS service center address of the service network is determined according to the emergency SMS service center construction instruction and the emergency call number list; If the emergency SMS service center information includes a list of emergency call numbers, the address of the emergency SMS service center of the service network is determined based on the list of emergency call numbers.

5. The method according to claim 4, characterized in that, Determining the address of the emergency SMS service center of the service network based on the emergency call number list includes: determining the emergency call numbers in the emergency call number list as the address of the emergency SMS service center of the service network.

6. The method according to claim 4, characterized in that, Also includes: The emergency SMS service center address and PLMD ID of the service network are associated and stored.

7. The method according to claim 2, characterized in that, Receiving emergency SMS service center information from the service network during the registration process includes: sending a network access request message to the second communication node; and receiving a network access response message sent by the second communication node; wherein the network access response message includes the emergency SMS service center information from the service network.

8. The method according to claim 7, characterized in that, When the service network is a 4G network, the network access request message is an attach request message, and the network access response message is an attach response message.

9. The method according to claim 7, characterized in that, When the service network is a 5G network, the network access request message is a registration request message, and the network access response message is a registration response message.

10. The method according to any one of claims 1 to 9, characterized in that, The address of the emergency SMS service center is filled into the relay protocol target address field of the first emergency SMS.

11. A method for transmitting emergency text messages, characterized in that, The method is applied to a third communication node and includes: receiving a first emergency text message sent by a first communication node; wherein the first emergency text message includes the address of an emergency text message service center of the service network; and sending the first emergency text message to an emergency text message service center in the service network according to the address of the emergency text message service center.

12. The method according to claim 11, characterized in that, Also includes: Receive the second emergency SMS message sent by the emergency SMS service center to the first communication node; Determine the second communication node currently serving the first communication node; The second emergency text message is sent from the second communication node to the first communication node.

13. The method according to claim 12, characterized in that, Also includes: Store the identifier of the first communication node and the identifier of the second communication node that serves the first communication node; The step of determining the second communication node currently serving the first communication node includes: determining the second communication node currently serving the first communication node based on the stored information of the identifier of the first communication node and the identifier of the second communication node.

14. The method according to claim 13, characterized in that, The identifier of the first communication node and the identifier of the second communication node serving the first communication node are obtained by at least one of the following: receiving the identifier of the first communication node and the identifier of the second communication node sent by the second communication node during the registration process of the first communication node; learning the identifier of the first communication node and the identifier of the second communication node during the transmission of the first emergency SMS message.

15. A registration method, characterized in that, Applied to a second communication node, the method includes: receiving a network access request message from a first communication node; sending a network access response message to the first communication node; wherein the network access response message includes emergency SMS service center information of the serving network.

16. The method according to claim 15, characterized in that, The emergency SMS service center information includes at least one of the following: emergency SMS service center address; Public Land Mobile Network ID (PLMN ID) of the service network; List of emergency call numbers; instructions for setting up an emergency SMS service center.

17. The method according to claim 15, characterized in that, When the service network is a 4G network, the network access request message is an attach request message, and the network access response message is an attach response message.

18. The method according to claim 15, characterized in that, When the service network is a 5G network, the network access request message is a registration request message, and the network access response message is a registration response message.

19. The method according to claim 15, characterized in that, Also includes: Send the identifiers of the first communication node and the second communication node to the third communication node.

20. A communication device, characterized in that, include: A memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the method according to any one of claims 1-19.

21. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-19.

Images