Communication control method, storage medium, electronic device and computer program product

Abstract

Provided in the embodiments of the present disclosure are a communication control method, a storage medium, an electronic device and a computer program product. The method comprises: sending a system message carrying emergency communication mode information. In the embodiments of the present disclosure, a user can be notified, by means of emergency communication mode information, that the current mode is an emergency communication mode, thereby enabling specific users to access a communication system.

Description

Communication control methods, storage media, electronic devices and computer program products

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese patent application CN202411052127.8, filed on August 1, 2024, entitled “Communication Control Method, Storage Medium, Electronic Device and Computer Program Product”, and incorporates the entire contents of that patent application by reference. Technical Field

[0003] This disclosure relates to the field of communications, and more specifically, to a communication control method, storage medium, electronic device, and computer program product. Background Technology

[0004] Satellite communication has the advantages of wide coverage and strong disaster resistance. It is not limited by terrain and can cover areas that cannot be covered by terrestrial communication networks. It is also not affected by terrestrial infrastructure. It can effectively respond to natural disasters such as earthquakes, floods, and typhoons, make up for the defects of damaged or interrupted terrestrial communication networks, and provide timely and effective communication support for rescuers and people in disaster areas, including voice, data, and video. Therefore, satellite communication is a very effective emergency communication method.

[0005] However, satellite communication has limited capacity, and its wide coverage is also a disadvantage. A single satellite or beam is essentially equivalent to a ground base station, typically covering hundreds of square kilometers—equivalent to the service area of ​​nearly a thousand ground base stations. In the event of a loss of terrestrial communication, the satellite needs to provide service to users within its coverage area, far exceeding its capacity. In disaster areas, even if only one percent of users connect to satellite, it can cause system collapse, preventing specific groups such as emergency firefighters from timely accessing the system and communicating with the outside world. Insufficient system capacity can generally be addressed through expansion, but this is virtually impossible for satellite communication.

[0006] A solution is urgently needed to address the above problems. Summary of the Invention

[0007] This disclosure provides a communication control method, storage medium, electronic device, and computer program product to at least solve the technical problem of system crashes caused by a large number of users simultaneously accessing a satellite in emergency communication scenarios in the related art.

[0008] According to one embodiment of this disclosure, a communication control method is provided, the method comprising: sending a system message carrying emergency communication mode information.

[0009] According to another embodiment of this disclosure, a communication control method is also provided, the method comprising: receiving a system message carrying emergency communication mode information; parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information.

[0010] According to yet another embodiment of this disclosure, a computer-readable storage medium is also provided, which stores a computer program, wherein the computer program is executed by a processor to perform the steps in any of the above method embodiments.

[0011] According to yet another embodiment of this disclosure, an electronic device is also provided, including a memory and a processor, the memory storing a computer program, the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0012] According to yet another embodiment of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments. Attached Figure Description

[0013] Figure 1 is a hardware structure block diagram of a mobile terminal for a communication control method according to an embodiment of the present disclosure;

[0014] Figure 2 is a flowchart of a communication control method for a base station according to an embodiment of the present disclosure;

[0015] Figure 3 is a flowchart of a communication control method for a terminal according to an embodiment of the present disclosure;

[0016] Figure 4 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (I);

[0017] Figure 5 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (II);

[0018] Figure 6 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (III);

[0019] Figure 7 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (IV);

[0020] Figure 8 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (V);

[0021] Figure 9 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (VI). Detailed Implementation

[0022] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and examples.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] The methods and embodiments provided in this disclosure can be applied to non-terrestrial networks (NTNs), including but not limited to satellite communication networks. For example, a satellite communication network consists of base stations and user terminals. The base stations can be deployed on communication satellites, including but not limited to low-Earth orbit satellites, medium-Earth orbit satellites, and geostationary satellites. User terminals include, but are not limited to, mobile terminals and computer terminals.

[0025] Non-terrestrial networks (such as satellite communications) can be used to supplement the coverage of terrestrial wireless communication networks (such as cellular networks). They provide communication services to user terminals in remote areas, at sea, or in the air where terrestrial networks cannot reach.

[0026] In wireless communication systems, the user access process typically includes cell search, cell selection, and random access procedures. After powering on, the user first performs a cell search, searching for synchronization signals to achieve downlink time and frequency synchronization. This allows the user to decode cell-specific reference signals, perform channel estimation, and decode the Physical Broadcast Channel (PBCH) carrying the Master Information Block (MIB). The user then continues to receive system messages from the base station. These messages contain essential information for network access and are broadcast, making them accessible to all users. Based on this information, the user can then initiate a random access procedure to achieve uplink synchronization and network access.

[0027] In an exemplary embodiment, after receiving system information, a user in an idle state can use contention-based random access. Based on the contention access parameters indicated by the system message, the user determines the preamble and Physical Random Access Channel (PRACH) resources, and sends the preamble (Msg1) to the base station on the indicated time-frequency resources, thus initiating the first step of the random access process. Upon receiving the preamble, the base station responds with a random access response (Msg2). The user initially determines whether the response is intended for them based on the information carried in the random access response. If the initial determination is that it is intended for them, the base station then sends a new message (Msg3). After receiving Msg3, the base station generates a new message, Msg4, based on Msg3 and sends it to the user to complete the random access process. In this process, the number of random access preambles is limited. In emergency communication scenarios, if tens of thousands of users access the network simultaneously, dozens or even hundreds of users might choose the same preamble in the first step. Even if the base station can identify the preamble in the second step and send a Msg2 matching it, in the third step, after receiving Msg2, these dozens or hundreds of users might mistakenly believe it's for themselves and send their own Msg3s to the base station. At this point, the base station will be unable to detect Msg3, causing system crashes. Therefore, this embodiment of the present disclosure designs a communication control method that, when the communication network is in emergency communication mode, only specific users with special emergency communication capabilities are allowed to access the network. For specific users, after receiving a system message, they can determine the random access parameters and resources according to the system message instructions and initiate a random access procedure. For non-specific users, after receiving a system message, they can correctly parse the system message but cannot initiate a random access procedure, or they cannot parse the system message and therefore cannot initiate a random access procedure. This solves the problem of system crashes caused by a large number of users simultaneously accessing the satellite in emergency communication scenarios in related technologies.

[0028] The method embodiments provided in this disclosure can be executed in a mobile terminal, computer terminal, or similar computing device. Taking a mobile terminal as an example, FIG1 is a hardware structure block diagram of a mobile terminal for the communication control method of this disclosure. As shown in FIG1, the hardware board may include one or more (only one is shown in FIG1) processors 12 (processors 12 may include, but are not limited to, microprocessors MCUs or programmable logic devices FPGAs, etc.) and a memory 14 for storing data. The mobile terminal may also include a transmission device 16 for communication functions and an input / output device 18. It will be understood by those skilled in the art that the structure shown in FIG1 is only illustrative and does not limit the structure of the mobile terminal. For example, the mobile terminal may include more or fewer components than shown in FIG1, or have a different configuration than shown in FIG1.

[0029] The memory 14 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the communication control method in this embodiment. The processor 12 executes various functional applications and communication control methods by running the computer programs stored in the memory 14, thus implementing the aforementioned methods. The memory 14 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 14 may further include memory remotely located relative to the processor 12, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0030] The transmission device 16 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by a communications provider. In one example, the transmission device 16 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 16 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0031] One embodiment of this disclosure provides a communication control method, which is applied to the base station side, especially to a satellite base station in a satellite communication network, but this disclosure is not limited thereto.

[0032] Figure 2 is a flowchart of a communication control method for a base station according to an embodiment of the present disclosure. As shown in Figure 2, the process includes the following steps:

[0033] Step S202: Send a system message carrying emergency communication mode information.

[0034] In this embodiment, the system message is sent via broadcast, and all user terminals within the coverage area can receive the system message. Furthermore, if the system message is broadcast by a satellite base station, then all user terminals with satellite communication capabilities within the satellite base station's range can receive the system message.

[0035] In this embodiment of the disclosure, by using the above step S202, emergency communication mode information can be included in the system message to notify the user that the current mode is emergency communication mode, so that specific users with special emergency communication capabilities can access the communication system. This can solve the problem of system crash caused by a large number of users accessing the satellite at the same time in emergency communication scenarios in related technologies, avoid a large number of users accessing the system indiscriminately at the same time, and achieve the technical effect of ensuring the communication quality of specific users in emergency communication scenarios.

[0036] In some embodiments, emergency communication mode information may include indication information and / or configuration information. For example, the indication information may indicate whether the current network communication mode is emergency communication mode, and the configuration information may configure communication resources for the user, such as communication resources for ordinary users or emergency communication users under emergency communication mode.

[0037] In some embodiments, the system message includes at least one of the following: a Master Information Block (MIB) message and a System Information Block Type 1 (SIB1) message.

[0038] In this embodiment, MIB messages are transmitted via the Physical Broadcast Channel (PBCH), and SIB1 messages are transmitted via the Physical Downlink Shared Channel (PDSCH). Furthermore, MIB messages can indicate scheduling information for SIB1 messages, such as time-domain resources and frequency-domain resources. SIB1 messages can indicate scheduling information for other SIB messages.

[0039] In some embodiments, the MIB message includes a reserved information bit field, wherein the value of the reserved information bit field is used to indicate whether the current communication network is in emergency communication mode.

[0040] In an exemplary embodiment, the reserved information bit field can be represented as Spare, where Spare = 1 indicates that the current communication network is in emergency communication mode, and Spare = 0 indicates that the current communication network is in non-emergency communication mode, and vice versa. This disclosure does not limit the specific value of the reserved information bit field.

[0041] In some embodiments, the MIB message also carries configuration information of the current communication network in emergency communication mode, wherein the configuration information is jointly indicated by a first information field and a second information field, the first information field being an information field indicating whether the terminal is allowed to camp in the current cell, and the second information field being an information field configuring the time-frequency resources of the downlink physical control channel, the downlink physical control channel being used to schedule the SIB1 message, the first information field being set to prohibit camping in the current cell, and some or all of the bits in the second information field being inverted according to a preset inversion mode.

[0042] In an exemplary embodiment, the first information field can be represented as cellBarred, used to indicate whether the terminal is allowed to camp on the cell. The second information field can be represented as pdcch-ConfigSIB1, used to indicate the control resource set (CORESET) and search space of the Physical Downlink Control Channel (PDCCH). Further, the second information field is an information field that configures the control resource set and listening timing of the common search space of the PDCCH for Type 0, and CORESET 0 is used to schedule SIB1 messages.

[0043] In some embodiments, the SIB1 message includes a newly added third information field, wherein the value of the third information field is used to indicate whether the current communication network is in emergency communication mode.

[0044] In this embodiment, the MIB message can be implemented according to existing standards, and only the SIB1 message contains emergency communication mode information. For example, a value of 1 in the third information field indicates that the current communication network is in emergency communication mode, and a value of 0 in the third information field indicates that the current communication network is in non-emergency communication mode, and vice versa. This disclosure does not limit the specific value of the third information field.

[0045] In some embodiments, the SIB1 message further includes a non-terrestrial network cell prohibition domain, wherein, when the current communication network is in the emergency communication mode, the non-terrestrial network cell prohibition domain is set to prohibit access to the current communication network.

[0046] In one exemplary embodiment, the non-terrestrial network cell prohibition field is represented as cellBarredNTN, which indicates whether the current terminal is allowed to access the current non-terrestrial network (such as a satellite communication network). In emergency communication scenarios, cellBarredNTN is set to prohibit access by default, thus preventing all ordinary users from accessing the current network. Only specific users with special emergency communication capabilities can ignore this indication and access the current network.

[0047] In some embodiments, the SIB1 message includes a Public Land Mobile Network Identifier field, wherein, when the current communication network is in emergency communication mode, the Public Land Mobile Network Identifier field is set to a preset emergency communication network identifier.

[0048] In one exemplary embodiment, the Public Land Mobile Network (PLMN) identification field is represented as the PLMN ID. The PLMN ID is a set of numbers used to uniquely identify a mobile communication network, enabling the identification and differentiation of different mobile networks. In this embodiment of the disclosure, a dedicated PLMN ID (i.e., a preset emergency communication network identifier) ​​can be set for the emergency communication network, allowing users to identify the current communication network as an emergency communication network based on the PLMN ID.

[0049] In some embodiments, the emergency communication mode information is used to instruct a first terminal with special emergency communication capabilities to initiate a random access procedure. Furthermore, a second terminal without special emergency communication capabilities, upon receiving the emergency communication mode information, can determine that it is not allowed to access the satellite communication network and will not subsequently initiate a random access procedure. Alternatively, the second terminal may be unable to properly parse system messages (e.g., when the second information field is inverted), thus preventing it from initiating a random access procedure.

[0050] In this embodiment of the disclosure, when the communication network is in emergency communication mode, only specific users with special emergency communication capabilities are allowed to access the network. For specific users, upon receiving a system message, they can determine the random access parameters and resources according to the system message instructions and initiate a random access procedure. For non-specific users, upon receiving a system message, they can correctly parse the system message but do not initiate a random access procedure, or they cannot parse the system message and therefore cannot initiate a random access procedure. Through this embodiment of the disclosure, emergency communication mode information can be included in the system message to notify the user that the current mode is emergency communication mode. This solves the problem of system crashes caused by a large number of users simultaneously accessing the satellite in emergency communication scenarios in related technologies, avoiding indiscriminate simultaneous access by a large number of users, and achieving the technical effect of ensuring the communication quality of specific users in emergency communication scenarios.

[0051] In another embodiment of this disclosure, a communication control method is also provided, which is applied to the terminal side, including but not limited to mobile terminals, computer terminals, etc.

[0052] Figure 3 is a flowchart of a communication control method for a terminal according to an embodiment of the present disclosure. As shown in Figure 3, the process includes the following steps:

[0053] Step S302: Receive a system message carrying emergency communication mode information;

[0054] Step S304: Parse the system message to obtain the emergency communication mode information.

[0055] In some embodiments, step S304 may further include: parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information.

[0056] In this embodiment, the system message is sent by the base station in broadcast mode, and all user terminals within the coverage area can receive the system message. Furthermore, if the system message is broadcast by a satellite base station, then the current terminal is a user terminal with satellite communication capabilities.

[0057] In this embodiment of the disclosure, through the above steps S302 to S304, the user terminal can obtain emergency communication mode information from the system message, thereby determining that the current communication network is in emergency communication mode. This can solve the problem of system crash caused by a large number of users accessing the satellite simultaneously in emergency communication scenarios in related technologies, avoid a large number of users accessing the satellite indiscriminately at the same time, and achieve the technical effect of ensuring the communication quality of specific users in emergency communication scenarios.

[0058] In some embodiments, the method further includes the following steps:

[0059] Step S306: If the current communication network is in the emergency communication mode, determine whether the current terminal has special emergency communication capabilities;

[0060] Step S308A: If the current terminal has the special emergency communication capability, initiate a random access procedure; or, Step S308B: If the current terminal does not have the special emergency communication capability, prohibit the current terminal from initiating the random access procedure.

[0061] In this embodiment, step S306 can be executed after steps S302 and S304, but this disclosure is not limited thereto.

[0062] In some embodiments, the system message includes at least one of the following: a Master Information Block (MIB) message and a First System Information Block (SIB1) message.

[0063] In this embodiment, MIB messages are transmitted via the Physical Broadcast Channel (PBCH), and SIB1 messages are transmitted via the Physical Downlink Shared Channel (PDSCH). Furthermore, MIB messages can indicate scheduling information for SIB1 messages, such as time-domain resources and frequency-domain resources. SIB1 messages can indicate scheduling information for other SIB messages.

[0064] In some embodiments, the MIB message includes a reserved information bit field, wherein the value of the reserved information bit field is used to indicate whether the current communication network is in emergency communication mode.

[0065] In this embodiment, step S304 may include the following steps:

[0066] Step S304A-2: Parse the MIB message to obtain the reserved information bit field;

[0067] Step S304A-4: If the value of the reserved information bit field is a first preset value, determine that the current communication network is the emergency communication mode.

[0068] In one exemplary embodiment, the reserved information bit field can be represented as Spare, with a first preset value of 1, i.e., Spare = 1, indicating that the current communication network is in emergency communication mode. If Spare = 0 or other values, it indicates that the current communication network is in non-emergency communication mode. The first preset value can also be 0, and this disclosure does not limit the specific value of the first preset value.

[0069] In some embodiments, the MIB message also carries configuration information of the current communication network in emergency communication mode.

[0070] Furthermore, the method also includes: step S3052, in the case that the current communication network is in the emergency communication mode, parsing the MIB message to obtain the configuration information of the current communication network in the emergency communication mode.

[0071] In this embodiment, the configuration information is jointly indicated by a first information field and a second information field. The first information field is an information field indicating whether the terminal is allowed to camp in this cell, and the second information field is an information field configuring the time and frequency resources of the downlink physical control channel. The downlink physical control channel is used to schedule the SIB1 message.

[0072] In an exemplary embodiment, the first information field can be represented as cellBarred, used to indicate whether the terminal is allowed to camp on the cell. The second information field can be represented as pdcch-ConfigSIB1, used to indicate the control resource set (CORESET) and search space of the Physical Downlink Control Channel (PDCCH). Further, the second information field is an information field that configures the control resource set and listening timing of the Type 0 PDCCH common search space, and CORESET 0 is used to schedule SIB1 messages.

[0073] In some embodiments, in an emergency communication scenario, the first information field is set to prohibit camping in the current cell and some or all of the bits in the second information field are inverted according to a preset inversion mode.

[0074] In some embodiments, after step S3052, the method further includes: step S3054, where, if the first information field prohibits camping in the current cell and the current terminal has special emergency communication capabilities, some or all bits in the second information field are reversed according to a preset reversal mode.

[0075] In some embodiments, after step S3052, the method further includes: step S3056, where the second information domain is parsed normally if the first information domain prohibits camping in the current cell and the current terminal does not have special emergency communication capabilities.

[0076] In this embodiment, through steps S3052 to S3056, all terminals can normally receive the configuration information of the current communication network. However, in emergency communication scenarios, because the second information field is reversed, ordinary users will parse the second information field according to the normal process, resulting in parsing failure or parsing incorrect information, thus failing to initiate the random access procedure. Specific users with special emergency communication capabilities can parse the second information field according to the reversed mode, obtain the correct information, and thus successfully initiate the random access procedure.

[0077] In some embodiments, the SIB1 message includes a newly added third information field, wherein the value of the third information field is used to indicate whether the current communication network is in emergency communication mode.

[0078] In this embodiment, step S304 may include the following steps:

[0079] Step S304B-2: Parse the SIB1 message to obtain the newly added third information field;

[0080] Step S304B-4: If the value of the third information field is the second preset value, determine that the current communication network is the emergency communication mode.

[0081] In this embodiment, the MIB message can be implemented according to existing standards, containing emergency communication mode information only in the SIB1 message. For example, a second preset value of 1, i.e., the third information field equal to 1, indicates that the current communication network is in emergency communication mode; a third information field equal to 0 or other values ​​indicates that the current communication network is in non-emergency communication mode. The second preset value can also be 0; this disclosure does not limit the specific value of the second preset value.

[0082] In some embodiments, in addition to the third information field described above, the SIB1 message also includes a non-terrestrial network cell prohibition field. In emergency communication scenarios, the non-terrestrial network cell prohibition field is set by default to prohibit access to the current communication network, thereby denying all ordinary users access to the current network.

[0083] In this embodiment, step S304 may include the following steps:

[0084] Step S304C-2: Parse the SIB1 message to obtain the newly added third information field and non-terrestrial network cell prohibition field;

[0085] Step S304C-4: If the value of the third information field is the second preset value, determine that the current communication network is the emergency communication mode.

[0086] In some embodiments, after step S304C-4, the method further includes:

[0087] Step S304C-6: If the non-terrestrial network cell prohibition domain prohibits access to the current communication network and the current terminal does not have special emergency communication capabilities, the current terminal is prohibited from initiating a random access procedure.

[0088] Step S304C-8: If the non-terrestrial network cell prohibition domain prohibits access to the current communication network and the current terminal has the special emergency communication capability, the current terminal is allowed to initiate the random access procedure.

[0089] In one exemplary embodiment, the non-terrestrial network cell prohibition field is represented as cellBarredNTN, which indicates whether the current terminal is allowed to access the current non-terrestrial network (such as a satellite communication network). In emergency communication scenarios, cellBarredNTN is set to prohibit access by default, thus preventing all ordinary users from accessing the current network. Only specific users with special emergency communication capabilities can ignore this indication and access the current network.

[0090] In some embodiments, the SIB1 message includes a Public Land Mobile Network Identifier field.

[0091] In this embodiment, step S304 may include the following steps:

[0092] Step S304D-2: Parse the SIB1 message to obtain the Public Land Mobile Network Identifier field;

[0093] Step S304D-4: If the public land mobile network identifier field is a preset emergency communication network identifier, determine that the current communication network is the emergency communication mode.

[0094] In one exemplary embodiment, the Public Land Mobile Network (PLMN) identification field is represented as the PLMN ID. The PLMN ID is a set of numbers used to uniquely identify a mobile communication network, enabling the identification and differentiation of different mobile networks. In this embodiment of the disclosure, a dedicated PLMN ID (i.e., a preset emergency communication network identifier) ​​can be set for the emergency communication network, allowing users to identify the current communication network as an emergency communication network based on the PLMN ID.

[0095] In this embodiment, the user terminal can obtain emergency communication mode information from system messages and parse the system messages according to its own capabilities and the indication information. For specific users with special emergency communication capabilities, after receiving the system message, they can determine the random access parameters and resources according to the system message indication and initiate a random access procedure. For non-specific users, after receiving the system message, they can correctly parse the system message but do not initiate a random access procedure, or they cannot parse the system message and cannot initiate a random access procedure. Through this embodiment, the problem of system crashes caused by a large number of users simultaneously accessing the satellite in emergency communication scenarios can be solved, avoiding the indiscriminate simultaneous access of a large number of users and achieving the technical effect of ensuring the communication quality of specific users in emergency communication scenarios.

[0096] The various implementation methods of emergency communication mode information in system messages will be described in detail in the following embodiments.

[0097] Figure 4 is a schematic diagram of a terminal accessing the network in one embodiment of this disclosure (I). As shown in Figure 4, the process includes the following steps:

[0098] Step S401: The satellite communication network activates emergency communication mode;

[0099] In step S402, the satellite base station sends a MIB message in broadcast mode, and the MIB message will carry emergency communication mode information.

[0100] In step S403, a terminal with satellite communication capability receives a MIB message sent by a satellite base station and determines whether it is allowed to access the satellite communication network based on its own capability information.

[0101] In step S404, the satellite base station will continue to send other system messages, such as SIB1 messages, via broadcast mode;

[0102] Step S405: The first terminal accessing the satellite communication network is allowed to initiate a random access procedure.

[0103] In this embodiment, terminals can be categorized into a first terminal with special emergency communication capabilities and a second terminal without such capabilities, based on whether they possess them. If the satellite communication network is in emergency communication mode, only the first terminal is allowed to access the satellite communication network, while the second terminal is not.

[0104] In this embodiment, the first terminal allowed to access the satellite communication network can normally receive other system messages following the MIB message and initiate a random access procedure based on the received system messages. The second terminal not allowed to access the satellite communication network can terminate receiving information sent by the satellite base station after receiving the MIB message, or the second terminal can also normally receive other system messages following the MIB message but will not initiate a random access procedure.

[0105] Figure 5 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (II). As shown in Figure 5, the process includes the following steps:

[0106] In step S501, the satellite base station sends a MIB message in broadcast mode. The MIB message will carry emergency communication mode information, which is carried through the Spare field of the reserved information bit field in the MIB.

[0107] In step S502, after receiving the MIB information, the terminal that is about to access the satellite network detects the Spare domain to determine whether the current satellite network should enable the emergency communication mode.

[0108] In this embodiment, if the current satellite network is determined to be in emergency communication mode, the terminal continues to determine whether it is allowed to access the satellite communication network based on its own capabilities. Only the first terminal with special emergency communication capabilities can be allowed to access the satellite communication network and can initiate a random access procedure. If the current satellite network is determined to be in non-emergency communication mode, all terminals with satellite communication capabilities can initiate a random access procedure to access the satellite communication network.

[0109] Figure 6 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (III). As shown in Figure 6, the process includes the following steps:

[0110] In step S601, the satellite base station sends a system message MIB in broadcast mode. The MIB message will carry emergency communication mode information. The emergency communication mode information is completed by the cellBarred and pdcch-ConfigSIB1 fields in the MIB. The cellBarred field is set to prohibit camping in this cell, and the pdcch-ConfigSIB1 field indicates that part or all of the information bits are reversed.

[0111] In step S602, after receiving the MIB information, the terminal (second terminal) that is preparing to access the satellite network, if it ignores the detection of the cellBarred field, or if the cellBarred field indicates that it is prohibited from camping in this cell and, based on its own capability information, determines that it is not allowed to access the satellite network, then it parses the pdcch-ConfigSIB1 field according to the normal procedure, resulting in an incorrect parsing result. Since the pdcch-ConfigSIB1 field is used to indicate the time-frequency position of subsequent system messages (such as SIB1), a parsing error will result in the inability to receive other subsequent system messages.

[0112] In step S603, after receiving the MIB information, if the terminal (first terminal) that is about to access the satellite network detects that the cellBarred field is prohibited from camping in this cell, and determines that access to the satellite network is allowed based on its own capability information, the terminal will parse the pdcch-ConfigSIB1 field in a bit-reversed manner.

[0113] Figure 7 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (IV). As shown in Figure 7, the process includes the following steps:

[0114] Step S701: The satellite communication network activates emergency communication mode;

[0115] In step S702, the satellite base station sends system messages MIB and SIB1 in broadcast mode. A new field will be added to the SIB1 message to carry emergency communication mode information.

[0116] In step S703, a terminal with satellite communication mode receives the SIB1 message and determines whether it is allowed to access the satellite communication network based on the terminal's own capability information.

[0117] In step S704, the terminal will continue to receive system messages sent by the base station according to the normal procedure;

[0118] Step S705: If the terminal is allowed to access the satellite communication network, a random access procedure is initiated based on the received system message.

[0119] In this embodiment, terminals can be categorized into a first terminal with special emergency communication capabilities and a second terminal without such capabilities, based on whether they possess them. If the satellite communication network is in emergency communication mode, only the first terminal is allowed to access the satellite communication network, while the second terminal is not.

[0120] Figure 8 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (V). As shown in Figure 8, the process includes the following steps:

[0121] Step S801: The satellite communication network activates emergency communication mode;

[0122] In step S802, the satellite base station sends system messages MIB and SIB1 in broadcast mode. A new field will be added to the SIB1 message to carry emergency communication mode information, and the cellBarredNTN in SIB1 indicates negation, that is, access to the satellite network is not allowed.

[0123] In step S803, the first terminal (with satellite communication mode and special emergency communication capability) receives the SIB1 message. Since it has special emergency communication capability, the first terminal detects that the emergency communication mode is enabled, ignores the cellBarredNTN indication, and determines that it can be allowed to access the satellite communication network.

[0124] In step S804, the second terminal (which has satellite communication mode but no special emergency communication capability) receives the SIB1 message. Since it does not have special emergency communication capability, the second terminal detects that the cellBarredNTN indication is negative, meaning that access to the satellite network is not allowed, and thus determines that it is not allowed to access the satellite communication network.

[0125] In step S805, the first terminal will continue to receive other system messages sent by the base station according to the normal procedure; the second terminal can receive normally or stop receiving.

[0126] In step S806, the first terminal that is allowed to access the satellite communication network initiates a random access procedure based on the received system message; the second terminal that is not allowed to access the satellite communication network will not initiate a random access procedure.

[0127] Figure 9 is a schematic diagram of the terminal accessing the network in one embodiment of this disclosure (six). As shown in Figure 9, the process includes the following steps:

[0128] Step S901: The satellite communication network activates emergency communication mode;

[0129] In step S902, the satellite base station sends system messages MIB and SIB1 in broadcast mode. The SIB1 message will carry a special network ID, which can be called the emergency communication network PLMN ID.

[0130] In step S903, the first terminal (equipped with satellite communication mode and special emergency communication capability) receives the SIB1 message, detects the emergency communication network PLMN ID, and determines that it can be allowed to access the satellite communication network due to its own special emergency communication capability.

[0131] In step S904, the second terminal (which has satellite communication mode but no special emergency communication capability) receives the SIB1 message, detects the emergency communication network PLMN ID, and determines that it is not allowed to access the satellite communication network because it does not have special emergency communication capability.

[0132] In step S905, the first terminal, which is allowed to access the satellite communication network, continues to receive other system messages sent by the base station according to the normal procedure; the second terminal can receive messages normally or terminate receiving.

[0133] In step S906, the first terminal that is allowed to access the satellite communication network initiates a random access procedure based on the received system message; the second terminal does not initiate a random access procedure.

[0134] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0135] Embodiments of this disclosure also provide a computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to perform the steps in any of the above method embodiments.

[0136] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.

[0137] Embodiments of this disclosure also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0138] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0139] Embodiments of this disclosure also provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the methods described in various embodiments of this disclosure.

[0140] Embodiments of this disclosure also provide a base station, including a memory and a processor, the memory storing a computer program, the processor being configured to run the computer program to perform the steps in any of the above-described base station-side method embodiments.

[0141] Embodiments of this disclosure also provide a terminal including a memory and a processor, the memory storing a computer program, the processor being configured to run the computer program to perform the steps in any of the terminal-side method embodiments described above.

[0142] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0143] It is obvious to those skilled in the art that the modules or steps of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this disclosure is not limited to any particular combination of hardware and software.

[0144] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A communication control method, the method comprising: Send a system message carrying emergency communication mode information.

2. The method according to claim 1, wherein, The system messages include at least one of the following: the main information block (MIB) message and the first system information block (SIB1) message.

3. The method according to claim 2, wherein the MIB message includes a reserved information bit field, wherein, The value of the reserved information bit field is used to indicate whether the current communication network is in emergency communication mode.

4. The method according to claim 2, wherein the MIB message carries configuration information of the current communication network in emergency communication mode, wherein, The configuration information is jointly indicated by a first information field and a second information field. The first information field is an information field indicating whether the terminal is allowed to camp in the current cell. The second information field is an information field that configures the time and frequency resources of the downlink physical control channel. The downlink physical control channel is used to schedule the SIB1 message. The first information field is set to prohibit camping in the current cell, and some or all of the bits in the second information field are inverted according to a preset inversion mode.

5. The method according to claim 2, wherein the SIB1 message includes a newly added third information field, wherein, The value of the third information field is used to indicate whether the current communication network is in emergency communication mode.

6. The method according to claim 5, wherein the SIB1 message further includes a non-terrestrial network cell prohibition domain, wherein, When the current communication network is in the emergency communication mode, the non-terrestrial network cell prohibition domain is set to prohibit access to the current communication network.

7. The method according to claim 2, wherein the SIB1 message includes a Public Land Mobile Network Identifier field, wherein, When the current communication network is in emergency communication mode, the public land mobile network identifier field is set to a preset emergency communication network identifier.

8. The method according to claim 1, wherein, The emergency communication mode information is set to instruct the first terminal with emergency communication capabilities to initiate a random access procedure.

9. A communication control method, the method comprising: Receive system messages carrying emergency communication mode information; The emergency communication mode information is obtained by parsing the system messages.

10. The method according to claim 9, further comprising: Determine whether the current communication network is in emergency communication mode based on the emergency communication mode information; If the current communication network is in the emergency communication mode, determine whether the current terminal has emergency communication capabilities; If the current terminal possesses the emergency communication capability, the current terminal initiates a random access procedure; or, If the current terminal does not have the emergency communication capability, the current terminal will not initiate the random access procedure.

11. The method according to claim 9, wherein, The system messages include at least one of the following: the main information block (MIB) message and the first system information block (SIB1) message.

12. The method according to claim 11, wherein, Parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information, including: Parse the MIB message to obtain the reserved information bit field; If the value of the reserved information bit field is a first preset value, the current communication network is determined to be the emergency communication mode.

13. The method according to claim 11, further comprising: When the current communication network is in the emergency communication mode, the MIB message is parsed to obtain the configuration information of the current communication network in the emergency communication mode. The configuration information is jointly indicated by a first information field and a second information field. The first information field is an information field indicating whether the terminal is allowed to camp in this cell. The second information field is an information field that configures the time and frequency resources of the downlink physical control channel. The downlink physical control channel is used to schedule the SIB1 message.

14. The method according to claim 13, further comprising: When the first information domain prohibits camping in the current cell and the current terminal has emergency communication capabilities, some or all bits in the second information domain are reversed according to a preset reversal mode.

15. The method according to claim 11, wherein, Parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information, including: The newly added third information field is obtained by parsing the SIB1 message; If the value of the third information field is a second preset value, the current communication network is determined to be the emergency communication mode.

16. The method according to claim 11, wherein, Parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information, including: Parsing the SIB1 message yields the newly added third information field and the non-terrestrial network cell prohibition field; If the value of the third information field is a second preset value, the current communication network is determined to be the emergency communication mode.

17. The method according to claim 16, further comprising: If the non-terrestrial network cell prohibits access to the current communication network and the current terminal does not have emergency communication capabilities, the current terminal will not initiate a random access procedure. If the non-terrestrial network cell prohibits access to the current communication network and the current terminal has the emergency communication capability, the current terminal initiates the random access procedure.

18. The method according to claim 11, wherein, Parsing the system message to obtain the emergency communication mode information, and determining whether the current communication network is in emergency communication mode based on the emergency communication mode information, including: Parse the SIB1 message to obtain the Public Land Mobile Network Identifier field; If the public land mobile network identifier field is a preset emergency communication network identifier, the current communication network is determined to be the emergency communication mode.

19. A computer-readable storage medium storing a computer program, wherein, The computer program is executed by the processor to perform the method described in any one of claims 1 to 18.

20. An electronic device comprising a memory and a processor, the memory storing a computer program, the processor being configured to run the computer program to perform the method of any one of claims 1 to 18.

21. A computer program product comprising a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1 to 18.

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