US 2023/0422121 A1 · HANDOVER METHOD AND DEVICE

Abstract

A method includes: sending, by a first network device, a first configuration message to a terminal device, where the first configuration message is used to instruct the terminal device to configure a second ciphering/deciphering function associated with a second network device and share a first data packet numbering/reordering function, and the terminal device is configured with the first data packet numbering/reordering function and a first ciphering/deciphering function associated with the first network device; and receiving, by the first network device, a first configuration complete message sent by the terminal device. In this embodiment, the first configuration message is used so that the terminal device may configure the function associated with the second network device. Therefore, during handover, the terminal device may simultaneously perform data transmission with the second network device and the first network device, to reduce or avoid a service interruption time caused by handover.

Claims20

Dependent claims

A method applied in a communication device, comprising:

receiving a first message, wherein the first message is from a first network device, wherein the communication device is configured with a first data packet numbering/reordering function and a first ciphering/deciphering function, the first data packet numbering/reordering function is used to process data transmitted between the first network device and the communication device;
configuring in response to the first message, a second ciphering/deciphering function and using the first data packet numbering/reordering function to process data transmitted between a second network device and the communication device, wherein the second ciphering/deciphering function is associated with the second network device;
and
sending a second message to the second network device.

1 more element

A method applied in a first network device, comprising:

sending a third message indicating a request to hand over a communication device to a second network device;
receiving a fourth message indicating that the request from the first network device is accepted;
sending a first message, wherein the first message indicates the communication device to configure a second ciphering/deciphering function and use a first data packet numbering/reordering function, wherein the first data packet numbering/reordering function is common for processing data between the second network device and the communication device and data between the first network device and the communication device, and the second ciphering/deciphering function is associated with the second network device.

An apparatus applied in a communication device, comprising at least one circuitry configured to:

receive a first message, wherein the first message is from a first network device, wherein the communication device is configured with a first data packet numbering/reordering function and a first ciphering/deciphering function, the first data packet numbering/reordering function is used to process data transmitted between the first network device and the communication device;
in response to the first message, configure a second ciphering/deciphering function and use the first data packet numbering/reordering function to process data transmitted between a second network device and the communication device, wherein the second ciphering/deciphering function is associated with the second network device;
and
send a second message to the second network device.

1 more element

An apparatus in a first network device, comprising at least one circuitry configured to:

send a third message indicating a request to hand over a communication device to a second network device;
receive a fourth message indicating that the request is accepted;
send a first message, wherein the first message indicates the communication device to configure a second ciphering/deciphering function and use a first data packet numbering/reordering function, wherein the first data packet numbering/reordering function is common for processing data between the second network device and the communication device and data between the first network device and the communication device, and the second ciphering/deciphering function is associated with the second network device.

Dependencies are inferred from the claim text.

Handover method and device

Life of this patent

Handover method and device

Life of this patent

Abstract

Claims20