Wireless communications method and device

A terminal device, comprising:

• a memory storing code;
• and
• a processor connected to the memory and, when the code is executed, configured to:
• cause the terminal device to access a first cell in a first system;
• generate first information indicative of whether the terminal device supports sending an attach request message with a handover indication to a network device;
• cause the terminal device to send the first information to the network device in the first system;
• and
• perform a procedure determined by the network device in the first system to cause the terminal device to establish an access to a second cell in a second system,
• wherein in response to a registration mode of the terminal device being an SR mode, the determined procedure is a handover procedure or a redirection procedure,
• wherein in response to the terminal device keeping a connected state with the first cell, and the first system not supporting interworking with an N26 interface, the determined procedure is the redirection procedure,
• wherein the network device is an access network device, and
• wherein the processor is configured to determine at least one of the support for interworking with an N26 interface by the first system or the support for interworking without an N26 interface by the first system based on preset information.

A method for wireless communication, comprising:

• determining, by a first network device in a first system, at least one of a registration mode of a terminal device, a supported registration mode of the terminal device, a support for interworking with an N26 interface by a first system, or a support for interworking without an N26 interface by the first system, wherein the registration mode is a single registration (SR) mode of registration with a single system or a dual registration (DR) mode of registration with dual systems, and a first cell in the first system is accessed by the terminal device;
• determining, by the first network device, according to the determined at least one of the registration mode of the terminal device, the supported registration mode of the terminal device, the support for interworking with an N26 interface by the first system, or the support for interworking without an N26 interface by the first system, an allowed procedure for the terminal device to access a second cell in a second system;
• and
• making, by the first network device, the terminal device to perform the allowed procedure to establish an access to the second cell,
• wherein in response to the registration mode of the terminal device being an SR mode, the determined procedure is a handover procedure or a redirection procedure,
• wherein in response to the terminal device keeping a connected state with the first cell, and the first system not supporting interworking with an N26 interface, the determined procedure is the redirection procedure,
• wherein the network device is an access network device, and
• wherein the processor is configured to determine at least one of the support for interworking with an N26 interface by the first system or the support for interworking without an N26 interface by the first system based on preset information.

A method for wireless communication, comprising:

• accessing, by a terminal device, a first cell in a first system;
• generating, by the terminal device, first information indicative of whether the terminal device supports sending an attach request message with a handover indication to a network device;
• sending, by the terminal device, the first information to the network device in the first system;
• and
• performing, by the terminal device, a procedure determined by the network device in the first system to establish an access to a second cell in a second system,
• wherein in response to a registration mode of the terminal device being an SR mode, the determined procedure is a handover procedure or a redirection procedure,
• wherein in response to the terminal device keeping a connected state with the first cell, and the first system not supporting interworking with an N26 interface, the determined procedure is the redirection procedure,
• wherein the network device is an access network device, and
• wherein the processor is configured to determine at least one of the support for interworking with an N26 interface by the first system or the support for interworking without an N26 interface by the first system based on preset information.