Network access method, network-side device, and terminal in disaster condition

A terminal, comprising a processor, a memory, and programs or instructions stored in the memory and executable on the processor, the programs or instructions, when executed by the processor, causes the terminal to perform:

• obtaining, by the terminal, first information, and transmitting a registration request to a first network in a case that the first information meets a first predetermined condition,
• wherein the first predetermined condition comprises:
• the first information comprises third indication information for indicating that the terminal is capable of obtaining the DC service;
• and
• receiving, by the terminal, a registration accept message transmitted by the first network for indicating that the first network is allowed to be accessed in a case that a first condition is met,
• the first condition comprising any one of following that:
• the terminal accesses the first network in a first access mode, a second network is in a disaster condition (DC) or the first network is notified that the second network is in a DC, and an authentication result of the terminal is that the terminal is capable of obtaining a DC service, the first access mode comprising initial registration, or mobile and periodic update registration;
• or
• the terminal accesses the first network in a DC dedicated registration mode, a second network is in a DC or the first network is notified that the second network is in a DC, and an authentication result of the terminal is that the terminal is capable of obtaining a DC service,
• wherein the first network is a network capable of providing a first service, and the first service comprises a DC roaming service;
• and
• the second network comprises at least one of following:
• a network accessed by the terminal currently;
• a home network of the terminal;
• or
• a network in a DC;
• and
• further comprises the steps of:
• obtaining, by the terminal, the first information, and stopping transmitting the registration request to the first network in a case that the first information meets a second predetermined condition,
• wherein the second predetermined condition comprises any one of following that:
• the first information comprises first indication information for indicating that the terminal is incapable of obtaining the DC service;
• or
• the first information comprises second indication information for indicating a list of networks incapable of providing the terminal with the DC service, the list of networks comprising information of the first network.

A non-transitory computer-readable storage medium, storing programs or instructions, wherein the programs or instructions, when executed by a processor of a terminal, causes the terminal to perform:

• obtaining, by the terminal, first information, and transmitting a registration request to a first network in a case that the first information meets a first predetermined condition,
• wherein the first predetermined condition comprises:
• the first information comprises third indication information for indicating that the terminal is capable of obtaining the DC service;
• and
• receiving, by the terminal, a registration accept message transmitted by the first network for indicating that the first network is allowed to be accessed in a case that a first condition is met,
• the first condition comprising any one of following that:
• the terminal accesses the first network in a first access mode, a second network is in a disaster condition (DC) or the first network is notified that the second network is in a DC, and an authentication result of the terminal is that the terminal is capable of obtaining a DC service, the first access mode comprising initial registration, or mobile and periodic update registration;
• or
• the terminal accesses the first network in a DC dedicated registration mode, a second network is in a DC or the first network is notified that the second network is in a DC, and an authentication result of the terminal is that the terminal is capable of obtaining a DC service,
• wherein the first network is a network capable of providing a first service, and the first service comprises a DC roaming service;
• and
• the second network comprises at least one of following:
• a network accessed by the terminal currently;
• a home network of the terminal;
• or
• a network in a DC;
• and
• further comprises the steps of:
• obtaining, by the terminal, the first information, and stopping transmitting the registration request to the first network in a case that the first information meets a second predetermined condition,
• wherein the second predetermined condition comprises any one of following that:
• the first information comprises first indication information for indicating that the terminal is incapable of obtaining the DC service;
• or
• the first information comprises second indication information for indicating a list of networks incapable of providing the terminal with the DC service, the list of networks comprising information of the first network.