Method for processing radio link failure, and terminal device and network device

A method for processing a Radio Link Failure (RLF), comprising:

• receiving, by a network device, same Packet Data Convergence Protocol (PDCP) layer data which is sent by a terminal device using a primary carrier and a secondary carrier;
• receiving, by the network device, first RLF type indication information sent by the terminal device, wherein the first RLF type indication information is used to indicate that a carrier where an RLF event occurs is the secondary carrier, and a number of transmissions of Acknowledged Mode Protocol Data Unit (AMD PDU) reaches a maximum number of transmissions in a Radio Link Control (RLC) entity corresponding to the secondary carrier where the RLF event occurs;
• and
• determining, by the network device, that the carrier where the RLF event occurs is the secondary carrier according to the first RLF type indication information;
• wherein receiving, by the network device, first RLF type indication information sent by the terminal device, comprises:
• receiving, by the network device, Secondary Cell Group (SCG) failure information sent by the terminal device, wherein the SCG failure information comprises the first RLF type indication information;
• wherein the primary carrier is a primary carrier in a Secondary Cell Group (SCG), and the secondary carrier is a secondary carrier in the SCG.

A terminal device, comprising:

• a processor;
• a non-transitory memory storing instructions executable by the processor;
• a transceiver;
• wherein the transceiver is configured to send same Packet Data Convergence Protocol (PDCP) layer data to a network device using a primary carrier and a secondary carrier;
• wherein the processor is configured to, if a number of transmissions of Acknowledged Mode Protocol Data Unit (AMD PDU) reaches a maximum number of transmissions in a Radio Link Control (RLC) entity corresponding to the secondary carrier, determine that a Radio Link Failure (RLF) event occurs in the secondary carrier;
• and
• wherein the transceiver is configured to send the first RLF type indication information to the network device, wherein the first RLF type indication information is used to indicate that a carrier where the RLF event occurs is the secondary carrier;
• wherein the transceiver is configured to:
• send Secondary Cell Group (SCG) failure information to the network device, wherein the SCG failure information comprises the first RLF type indication information;
• wherein the primary carrier is a primary carrier in a Secondary Cell Group (SCG), and the secondary carrier is a secondary carrier in the SCG.

A network device, comprising:

• a processor;
• a non-transitory memory storing instructions executable by the processor;
• a transceiver;
• wherein the transceiver is configured to receive same Packet Data Convergence Protocol (PDCP) layer data which is sent by a terminal device using a primary carrier and a secondary carrier;
• wherein the transceiver is configured to receive first RLF type indication information sent by the terminal device, wherein the first RLF type indication information is used to indicate that a carrier where a Radio Link Failure (RLF) event occurs is the secondary carrier, and a number of transmissions of Acknowledged Mode Protocol Data Unit (AMD PDU) reaches a maximum number of transmissions in a Radio Link Control (RLC) entity corresponding to the secondary carrier where the RLF event occurs;
• and
• wherein the processor is configured to determine that the carrier where the RLF event occurs is the secondary carrier according to the first RLF type indication information;
• wherein the transceiver is configured to:
• receive Secondary Cell Group (SCG) failure information sent by the terminal device, wherein the SCG failure information comprises the first RLF type indication information;
• wherein the primary carrier is a primary carrier in a Secondary Cell Group (SCG), and the secondary carrier is a secondary carrier in the SCG.