TW201811090A - Apparatuses and methods for providing assistance information for calls under isolated E-UTRAN operation for public safety (IOPS) - Google Patents

Abstract

A mobile communication device including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller determines whether the service network is an IOPS network, and in response to the service network being an IOPS network, transmits a first Attach Request message with an IOPS flag to the service network via the wireless transceiver. Also, the controller receives a first Attach Accept message with an encrypted mapping information from the service network via the wireless transceiver, and transmits a first Attach Complete message to the service network via the wireless transceiver.

Description

Method and device for providing call assistance information for public safety isolated network operation

This application is mainly related to the technology for retrieving call information, and in particular, it relates to a method and device for providing call assistance information for public safety isolated network operations.

In recent years, as the public ’s demand for ubiquitous computing and network communications has increased significantly, various wireless technologies have emerged, including: Global System for Mobile communications (GSM) technology, universal packet wireless services ( General Packet Radio Service (GPRS) technology, Enhanced Data rates for Global Evolution (EDGE) technology, Wideband Code Division Multiple Access (WCDMA) technology, and Code Division Multiple Access -2000 (Code Division Multiple Access 2000, CDMA-2000) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) technology, Worldwide Interoperability for Microwave Access, WiMAX) technology, long-term Long Term Evolution (LTE) technology, LTE-Advanced (LTE-A) technology, and Time-Division LTE (TD-LTE) technology.

Taking long-term evolution technology as an example, the 3rd Generation Partnership Project (3GPP) organization proposed the Isolated E-UTRAN Operation for Public Safety in the 13th edition of the standard specification book. In order to simplify the description, hereafter referred to as IOPS). When natural disasters occur, base stations in some areas may not be able to connect to the core network. However, if these base stations themselves are not damaged, it is hoped that these base stations can still independently serve their signal coverage. Mobile users within.

However, the problem that needs to be solved is that, because the base station under the IOPS structure cannot connect with the core network, the base station cannot obtain the information necessary to establish a call. Therefore, the base station will not be able to properly handle its signal coverage. Call request within.

A first embodiment of the present application provides a mobile communication device having a wireless transceiver and a controller. The wireless transceiver is used to perform wireless transmission and reception with a service network. The controller is used to determine whether the service network is an IOPS network. If so, the wireless transceiver sends a ATTACH REQUEST message including one of the IOPS indicators to the service network through the wireless transceiver. The wireless transceiver receives a first network acceptance (ATTACH ACCEPT) message including an encrypted mapping information from the service network, and passes the wireless transceiver through the wireless transceiver. Send a ATTACH COMPLETE message to the service network.

The second embodiment of the present application provides a method for providing call assistance information for public safety isolated network operations, which is applicable to a mobile communication device. The above method for providing call assistance information for public safety isolated network operations includes: determining Whether a service network is an IOPS network; if so, sending a first network request message including one of the IOPS indicators to the above service network; and receiving a first network including an encrypted mapping information from the above service network The network accepts the message; and sends a first connection completion message to the service network.

The third embodiment of the present application provides an action management entity coupled to a wireless base station. The mobile management entity includes a controller and a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium is used to store a computer program. When the computer program is executed, the controller executes a method for providing call assistance information for an isolated network operation for public safety. The above is for public safety. A method for providing call assistance information in an isolated network operation includes: receiving a first network request message from a mobile communication device through the wireless base station; and transmitting the information including the IOPS indicator when the first network request message includes an IOPS indicator One of the authentication information request messages to a home subscriber server (HSS); receiving one of the authentication information response messages including an encrypted mapping information from the above-mentioned home server; and transmitting the encrypted mapping including the encrypted mapping through the wireless base station One of the information is a first network receiving message to the mobile communication device; and a first network completion message is received from the mobile communication device through the wireless base station.

The fourth embodiment of the present application provides a method for public safety The method for providing call assistance information in isolated network operations is applicable to a mobile management entity coupled to a wireless base station. The method for providing call assistance information in isolated network operations for public safety includes: communicating from a mobile station through the wireless base station The device receives a first connection request message. When the first connection request message includes an IOPS indicator, the device sends a verification information request message including one of the IOPS indicators to a home server; receiving from the home user server includes A verification information response message of one of the encrypted mapping information; transmitting a first network acceptance message including one of the encrypted mapping information to the mobile communication device through the wireless base station; and receiving a first communication message from the mobile communication device through the wireless base station One net completed message.

The fifth embodiment of the present application provides a home user server coupled to a mobile management entity. The local user server includes a controller and a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium is used to store a computer program. When the computer program is executed, the controller executes a method for providing call assistance information for an isolated network operation for public safety. The above is for public safety. A method for providing call assistance information in an isolated network operation includes: receiving a verification information request message from the mobile management entity; and when the verification information request message includes an IOPS indicator, determining one of the mobile communication devices according to the verification information request message An international mobile subscriber ID and a mobile subscriber number; encrypting the international mobile subscriber ID and the mobile subscriber number to generate an encrypted mapping information; and transmitting a response message including verification information including one of the encrypted mapping information to the above operation Management entity.

The sixth embodiment of the present application provides a method for public safety The method for providing call assistance information in an isolated network operation is applicable to a local user server coupled to a mobile management entity. The method for providing call assistance information in an isolated network operation for public safety includes receiving from the above mobile management entity. A verification information request message; when the verification information request message includes an IOPS indicator, determining an international mobile user identifier and a mobile user number of a mobile communication device according to the verification information request message; The mobile subscriber number is encrypted to generate encrypted mapping information; and a response message including verification information including one of the encrypted mapping information is transmitted to the mobile management entity.

Regarding other additional features and advantages of the present invention, those skilled in the art can, without departing from the spirit and scope of this application, control the data communication congestion of the mobile communication device and specific application services disclosed in the implementation method of this case. Method, and non-transitory computer can read the storage medium to make a few changes and retouching.

100‧‧‧Wireless communication environment

110, 120‧‧‧ mobile communication devices

130‧‧‧Service Network

131‧‧‧ access network

131-A, 131-B‧‧‧Sub access network

132‧‧‧ Core Network

10‧‧‧Wireless Transceiver

11‧‧‧ RF Device

12‧‧‧ fundamental frequency processing device

13‧‧‧ Antenna

20, 70‧‧‧ Controller

30, 80‧‧‧ storage device

40‧‧‧ display device

50‧‧‧ input device

60‧‧‧Communication device

S410 ~ S460, S510 ~ S550‧‧‧step

FIG. 1 is a schematic diagram of a wireless communication environment according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a mobile communication device according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a network node according to an embodiment of the present application.

FIG. 4 is a message sequence diagram for providing call assistance information for public safety isolated network operations according to an embodiment of the present application.

Figure 5 shows the isolation for public safety according to another embodiment of the present application. Message sequence diagram of call assistance information for network operations.

This section describes the best way to implement this application. The purpose is to explain the spirit of this application and not to limit the protection scope of this application. It should be understood that the following embodiments can be implemented by software, hardware, firmware, or any of the above. To achieve. It is mentioned that the specification standards developed by the third-generation partner program organization are only used to help express the spirit of this application, not to limit the scope of protection of this application.

FIG. 1 is a schematic diagram of a wireless communication environment according to an embodiment of the present application. The wireless communication environment 100 includes mobile communication devices 110, 120, and a service network 130. The mobile communication devices 110, 120 are wirelessly connected to the service network 130 to obtain mobile services. The mobile communication devices 110 and 120 may be a functional mobile phone, a smart phone, a tablet computer, a notebook computer, or any electronic computing device, as long as it can support the wireless technology used by the service network 130. The service network 130 may be a long-term evolution network, a long-term evolution enhanced network, or a time-sharing long-term evolution network. Specifically, the service network 130 includes an access network 131 and a core network 132. The access network 131 is used to process radio signals, support terminal radio protocols, and connect machine type communication devices 110, 120 to the core network. 132, and regional mobile management; and the core network 132 is used to perform overall mobile management, network-side authentication, and interfacing with public networks (eg, the Internet). The access network 131 and the core network 132 may each include one or more network nodes for performing the above functions. For example, the access network 131 may include an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or mobile management An entity (Mobility Management Entity, MME) and the evolved universal terrestrial radio access network may include at least one evolved base station (evolve Node B, eNB), for example, a home evolved base station, a wide area (macro) base station And pico base stations; the core network 132 may be an Evolved Packet Core (EPC), which includes: Home Subscriber Server (HSS), mobile management entity, and service gateway (Serving Gateway, S-GW), and Packet Data Network Gateway (PDN-GW / P-GW).

In particular, the access network 131 can be further divided into sub-access networks 131-A, 131-B according to the region of its signal coverage, and the mobile communication devices 110, 120 are located in the sub-access network 131-A. Signal coverage. In one embodiment, when a natural disaster (such as an earthquake or tsunami) occurs, the sub-access network 131-A may be disconnected from the sub-access network 131-B, and the connection with the core network 132 may be lost. Therefore, the sub-access network 131-A becomes the IOPS network. In this case, the mobile communication devices 110 and 120 must obtain regional mobile services through the sub-access network 131-A.

FIG. 2 is a schematic diagram of a mobile communication device according to an embodiment of the present application. The mobile communication device may include a wireless transceiver 10, a controller 20, a storage device 30, a display device 40, and an input device 50. The wireless transceiver 10 is used to provide wireless transmission and reception functions with the service network 130. Specifically, the wireless transceiver 10 includes a radio frequency (RF) device 11, a base frequency processing device 12, and an antenna 13. The baseband processing device 12 is configured to perform baseband signal processing and control communication between a subscriber number card (not shown) and the radio frequency device 11. The baseband processing device 12 may include multiple hardware devices to perform Line fundamental frequency signal processing, including analog-to-digital conversion (ADC) / digital-to-analog conversion (DAC), gain adjustment, modulation and demodulation, and encoding / Decoding etc. The radio frequency device 11 may receive a radio frequency wireless signal from the antenna 13 and convert the radio frequency wireless signal into a fundamental frequency signal for further processing by the fundamental frequency processing device 12 or receive the fundamental frequency signal from the fundamental frequency processing device 12 and convert the fundamental frequency signal It is converted into a radio frequency wireless signal for transmission through the antenna 13. The radio frequency device 11 may also include multiple hardware devices to perform the above-mentioned radio frequency conversion. For example, the radio frequency device 11 may include a mixer to multiply the fundamental frequency signal by one of the radio frequencies used by the wireless technology. Carrier, where the radio frequency may be 900 MHz, 2100 MHz, or 2.6 GHz used by long-term evolution technology, long-term evolution enhanced technology, or time-sharing long-term evolution technology, or other radio frequency, depending on the wireless technology used.

The controller 20 may be a general-purpose processor, a microprocessor (Micro-Control Unit, MCU), an application processor, or a digital signal processor (DSP). The controller 20 includes various circuit logics for controlling wireless communication. The transceiver 10 performs wireless transmission and reception with the service network 130, reads or writes data from the storage device 30, transmits screen (including text, image, and image) data to the display device 40, and from The input device 50 receives an input signal and the like. In particular, the controller 20 is used to coordinately control the wireless transceiver 10, the storage device 30, the display device 40, and the input device 50 to perform the method for providing call assistance information for the public safety isolated network operation of the present application.

Those skilled in the art should understand that The circuit logic of the method can usually include multiple transistors to control the operation of the circuit logic to provide the required functions and operations. Furthermore, the specific structure of the transistor and the connection relationship between them are usually determined by the compiler. For example: the Register Transfer Language (RTL) compiler can be operated by the processor, and it will be similar to a combined language. The code's script is compiled into a form suitable for designing or manufacturing the circuit logic.

In another embodiment, the controller 20 may be integrated in the baseband processing device 12 as a baseband processor.

The storage device 30 is a non-transitory computer-readable storage medium, such as: Flash memory, or Non-Volatile Random Access Memory (NVRAM), etc. , Magnetic storage devices (such as magnetic tapes or hard disks), optical storage devices (such as: Compact Disc Read-Only Memory (CD-ROM)), or any combination of the above, used to store mobile communication devices 110, Encrypted mapping information between International Mobile Subscriber Identification (IMSI) and Mobile Subscriber International ISDN number (MSISDN) of 120, as well as communication protocols, applications, and methods of this application Instruction set or code.

The display device 40 may be a liquid crystal display (LCD), a light-emitting diode (LED) display, or an electronic paper display (EPD), etc., for providing a display function. Alternatively, the display device 40 may further include one or more touch sensors for detecting the proximity of an object (such as a finger or a stylus) / contact.

The input device 50 may include one or more buttons, a keyboard, a mouse, a touchpad, a video lens, a microphone, and / or a speaker, etc., for interacting with the user as a human-machine interface.

It can be understood that the components shown in FIG. 2 are only used to provide an illustrative example, and are not intended to limit the protection scope of the present application.

FIG. 3 is a schematic diagram of a network node according to an embodiment of the present application. In this embodiment, the network node may refer to a mobile management entity or a home user server. The network node includes a communication device 60, a controller 70, and a storage device 80.

The communication device 60 is used to provide wired connections to other network nodes in the service network 130 (for example, a wireless base station, a mobile management entity, a home user server, a service gateway, and a packet data network gateway, etc.). The communication device 60 may include a cable modem, an Asymmetric Digital Subscriber Line (ADSL) modem, a fiber-optic modem (FOM), an Ethernet interface, or other wired Web interface.

The controller 70 may be a general-purpose processor, a microprocessor, an application processor, or a digital signal processor. It includes various circuit logics to provide data processing and calculation functions, and controls the communication device 60 to communicate with other networks. The nodes communicate and read or write data from the storage device 80. In particular, the controller 70 is used to coordinately control the communication device 60 and the storage device 80 to execute the method for providing call assistance information for the public network-based isolated network operation of the present application.

Storage device 80 is a non-transitory computer-readable storage medium, for example For example: flash memory, or non-volatile random access memory, magnetic storage devices (such as magnetic tapes or hard disks), optical storage devices (such as read-only optical disks), or any combination of the above, for storage The (encrypted) mapping information between the international mobile subscriber identification numbers and mobile subscriber numbers of the mobile communication devices 110, 120, and the communication protocol, application, and instruction set or code of the method of this application.

Although not shown, the network node shown in FIG. 3 may further include other functional elements, such as an input / output device, a display device, and the like, and the protection scope of this application is not limited thereto.

FIG. 4 is a message sequence diagram for providing call assistance information for public safety isolated network operations according to an embodiment of the present application. In this embodiment, the method for providing call assistance information for public safety isolated network operations is applicable to the cooperative operation of the mobile communication device 110/120 and the service network 130, and is performed on the sub-access network 131-A and Before the core network 132 is disconnected. First, the mobile communication device 110/120 initiates registration with the service network 130. Specifically, the mobile communication device 110/120 sends an ATTACH REQUEST message to the mobile management entity in the sub-access network 131-A ( Step S410). In particular, the network request message includes an IOPS indicator, which is used to represent that the mobile communication device 110/120 supports IOPS.

Then, the mobile management entity uses the DIAMETER protocol to send an Authentication Information Request message including an IOPS indicator to the home user server in the core network 132 (step S420).

The local user server determines the international mobile user ID and mobile user number of the mobile communication device 110/120, and sets the international mobile user ID The mapping information with the mobile subscriber number is encrypted (step S430), and then an Authentication Information Response message including the encrypted mapping information is transmitted to the mobile management entity (step S440).

After that, the mobile management entity sends an ATTACH ACCEPT message including encrypted mapping information to the mobile communication device 110/120 (step S450), and the mobile communication device 110/120 responds to the ATTACH COMPLETE message to the mobile The management entity (step S460), and ends the registration process.

FIG. 5 is a message sequence diagram for providing call assistance information for public safety isolated network operations according to another embodiment of the present application. In this embodiment, the method for providing call assistance information for public safety isolated network operations is applicable to the cooperative operation of the mobile communication device 110/120 and the service network 130, and is performed on the sub-access network 131-A and After the core network 132 is disconnected. First, when the sub-access network 131-A detects disconnection from the core network 132, the sub-access network 131-A switches to IOPS mode operation and broadcasts system information through a wireless base station, where the system information In particular, it includes a Public Land Mobile Network (PLMN) identification code dedicated to IOPS (step S510). For example, the system information broadcasted by the wireless base station may be: System Information Block-1 (System Information Block-1, SIB1).

After receiving the system information broadcasted by the wireless base station, the mobile communication device 110/120 initiates registration with the sub-access network 131-A. Specifically, the mobile communication device 110/120 sends an ATTACH REQUEST message to The mobile management entity in the sub-access network 131-A (step S520). In particular, the connection request message includes the sub-access network 131-A and the core network 132. Encrypted mapping information obtained through the registration process before the disconnection occurs.

Then, the mobile management entity stores the encrypted mapping information of the mobile communication device 110/120 (step S530), and transmits the network acceptance message to the mobile communication device 110/120 through the wireless base station (step S540). Then, the mobile communication device 110/120 replies with the network completion message to the mobile management entity (step S550), and ends the registration process.

After the mobile communication devices 110 and 120 have registered with the sub-access network 131-A, the mobile management entity will know the encrypted mapping information of the mobile communication devices 110 and 120. Afterwards, when the mobile communication devices 110 and 120 are to communicate with each other, it is assumed that the mobile communication device 110 wants to send a call to the mobile communication device 120, and the mobile communication device 110 will bring the mobile user number of the called party in the call request. The entity can decrypt the recorded encrypted mapping information to query the international mobile user identification code corresponding to the mobile user number, that is, the international mobile user identification code of the mobile communication device 120. Then, the mobile communication device 120 is paged through the wireless base station according to the queried international mobile user identification code to notify the incoming call.

It should be noted that, regarding the registration process described in the embodiment of Figs. 4 and 5, for other detailed descriptions that are not within the scope of this application, please refer to the specification standard TS 24.008 made by the third-generation partner program organization. In addition, for other operation details of IOPS, please refer to TS 22.346.

According to the embodiments of FIG. 4 and FIG. 5 above, it can be understood that the present application provides a method for providing call assistance information for IOPS, which can provide enough information for an isolated network to realize the call requirements in the IOPS architecture. In other words, an isolated network can be obtained without communicating with the core network. Mobile user identification information necessary to establish a call.

Although the present application is disclosed in various embodiments as above, it is only for reference and is not intended to limit the scope of the application. Any person skilled in the art can make some changes without departing from the spirit and scope of the application. With retouch. Therefore, the above embodiments are not used to limit the scope of the present application, and the protection scope of the present application shall be determined by the scope of the attached patent application.

10‧‧‧Wireless Transceiver

11‧‧‧ RF Device

12‧‧‧ fundamental frequency processing device

13‧‧‧ Antenna

20‧‧‧ Controller

30‧‧‧Storage device

40‧‧‧ display device

50‧‧‧ input device

Claims (16)

A mobile communication device includes: a wireless transceiver for performing wireless transmission and reception with a service network; and a controller for determining whether the service network is a public safety isolated network operation (Isolated E-UTRAN Operation for Public Safety, IOPS) network, if so, send a first network request (ATTACH REQUEST) message including one of the IOPS indicators to the service network through the wireless transceiver, and send and receive through the wireless The receiver receives a ATTACH ACCEPT message including an encrypted mapping information from the service network, and sends a ATTACH COMPLETE message to the service through the wireless transceiver. network. The mobile communication device according to item 1 of the scope of patent application, wherein the encrypted mapping information includes one of the mobile communication devices, an International Mobile Subscriber Identification (IMSI), and a mobile subscriber number (Mobile Subscriber International ISDN) number, MSISDN) encrypted information. The mobile communication device according to item 1 of the scope of patent application, wherein when the controller is more than the service network other than an IOPS network, the controller transmits a second connection request including the encrypted mapping information through the wireless transceiver. To send a message to the service network, receive a second network acceptance message from the service network through the wireless transceiver, and send a second network completion message to the service network through the wireless transceiver. The mobile communication device according to item 1 of the scope of patent application, wherein the above The controller further receives a system information block 1 (System Information Block-1) from the service network through the wireless transceiver, and determines whether the service network is an IOPS network according to the system information block 1. A method for providing call assistance information for public safety in isolated network operations, applicable to a mobile communication device, including: determining whether a service network is an IOPS network; if so, transmitting the first connection including one of the IOPS indicators Receiving a network request message to the service network; receiving a first network acceptance message including an encrypted mapping information from the service network; and sending a first network completion message to the service network. The method for providing call assistance information for public safety in isolated network operations as described in item 5 of the scope of the patent application, wherein the encrypted mapping information includes encryption of an international mobile user identification code and a mobile user number of the mobile communication device Post information. The method for providing call assistance information for public safety in isolated network operations as described in item 5 of the scope of patent application, further includes transmitting the encrypted mapping through the wireless transceiver when the service network is not an IOPS network. One of the information is a second network request message to the service network, a second network acceptance message is received from the service network through the wireless transceiver, and a second network completion message is sent to the above through the wireless transceiver. Service network. The method for providing call assistance information for public safety in isolated network operations as described in item 5 of the scope of patent application, wherein the controller further receives a system information block 1 from the service network through the wireless transceiver, and according to on The system information block 1 is described above to determine whether the service network is an IOPS network. An action management entity, coupled to a wireless base station, includes: a controller; and a non-transitory computer-readable storage medium for storing a computer program that, when executed, causes the controller to execute a kind of A method for providing call assistance information for public safety isolated network operations. The method for providing call assistance information for public safety isolated network operations includes: receiving a first network request message from a mobile communication device through the wireless base station; When the first network connection request message includes an IOPS indicator, sending a verification information request message including one of the IOPS indicators to a home subscriber server (HSS); receiving from the home subscriber server includes an encrypted pair A verification information response message of one of the mapping information; transmitting a first network acceptance message including the encrypted mapping information to the mobile communication device through the wireless base station; and receiving a first network connection from the mobile communication device through the wireless base station Finish message. The mobile management entity described in item 9 of the scope of patent application, wherein the method for providing call assistance information for isolated public network operations for public safety further includes: detecting the disconnection between the mobile management entity and the local user server. At the same time, broadcast a publicly-safe public land mobile network (PLMN) identification code through the above wireless base station; Receiving a second network connection request message from the mobile communication device through the wireless base station; when the second network connection request message includes the encrypted mapping information, no communication with the home user server is needed to transmit a second network connection request through the wireless base station The second network receives a message to the mobile communication device; and receives a second network completion message from the mobile communication device through the wireless base station. The mobile management entity as described in item 10 of the scope of patent application, wherein the non-transitory computer-readable storage medium is also used to store the encrypted mapping information; among which, the above-mentioned isolated network operation for public safety provides call assistance information The method further includes: when receiving a call request to be dialed to one of the mobile communication devices through the wireless base station, decrypting the encrypted mapping information and determining an international mobile user identification corresponding to a mobile subscriber number of the mobile communication device Code; and paging the mobile communication device through the wireless base station according to the international mobile user identification code. A method for providing call assistance information for an isolated network operation for public safety, applicable to a mobile management entity coupled to a wireless base station, including: receiving a first network request message from a mobile communication device through the wireless base station; When the first network connection request message includes an IOPS indicator, a verification information request message including one of the IOPS indicators is transmitted to a home user server; and a check including an encrypted mapping information is received from the home user server. Certificate information response message; transmitting a first network acceptance message including the encrypted mapping information to the mobile communication device through the wireless base station; and receiving a first network completion message from the mobile communication device through the wireless base station. The method for providing call assistance information for an isolated network operation for public safety as described in item 12 of the scope of the patent application, further includes: when detecting the disconnection between the mobile management entity and the local user server, using the wireless The base station broadcasts a public mobile network identification code for a publicly-safe isolated network operation; receives a second connection request message from the mobile communication device through the wireless base station; the second connection request message includes the encrypted mapping information At this time, a second network acceptance message is transmitted to the mobile communication device through the wireless base station without communicating with the home user server; and a second network completion message is received from the mobile communication device through the wireless base station. The method for providing call assistance information for public safety in an isolated network operation as described in item 13 of the scope of patent application, further includes: encrypting the above-mentioned encryption when receiving a call request to be dialed to one of the mobile communication devices through the wireless base station Decrypt the mapping information and determine an international mobile subscriber identity corresponding to a mobile subscriber number of the mobile communication device; and page according to the international mobile subscriber identity and through the wireless base station The above mobile communication device. A local user server coupled to a mobile management entity includes: a controller; and a non-transitory computer-readable storage medium for storing a computer program that, when executed, causes the controller A method for providing call assistance information for public safety isolated network operations. The method for providing call assistance information for public safety isolated network operations includes: receiving a verification information request message from the above-mentioned mobile management entity; When the request message includes an IOPS indicator, an international mobile user ID and a mobile user number of a mobile communication device are determined according to the verification information request message; the international mobile user ID and the mobile user number are encrypted to generate an encryption Mapping information; and sending a response message including verification information of one of the encrypted mapping information to the above mobile management entity. A method for providing call assistance information for public safety in isolated network operations, applicable to a local user server coupled to a mobile management entity, including: receiving a verification information request message from the mobile management entity; and When the request message includes an IOPS indicator, an international mobile user ID and a mobile user number of a mobile communication device are determined according to the verification information request message; the international mobile user ID and the mobile user number are encrypted to generate an encryption Mapping information; and Send a verification response message including one of the encrypted mapping information to the mobile management entity.