Granted Patent B2

US 12,726,867 · App. 18/262,531 · Granted Sep 1, 2026

Inventors: Chuting Yao (Beijing, CN); Ao Guo (Shanghai, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04W36/023H04L69/04H04W36/0016H04W36/08

Abstract

Claims (56)

1 . A method applied to a terminal device or chip for the terminal device, and comprising:

obtaining M compressed data packets by compressing M data packets based on a first buffer, wherein M is a positive integer;

sending the M compressed data packets;

receiving a first indication information and a second indication information, wherein the first indication information indicates to reestablish a packet data convergence protocol layer, and wherein the second indication information indicates to continue to use the first buffer;

reestablishing the packet data convergence protocol layer without resetting the first buffer; and

sending N compressed data packets,

wherein the N compressed data packets are at least a portion of the M compressed data packets, and

wherein N is a positive integer less than or equal to M.

2 . The method of claim 1 , wherein a first data packet with a smallest sequence number in the N compressed data packets is the same as a second data packet with a smallest sequence number in data packets that are not successfully received by a network device.

3 . The method of claim 1 , further comprising sending capability information indicating that continuing to use the first buffer is supported.

4 . The method of claim 1 , wherein receiving the first indication information and the second indication information comprises

receiving a handover command, wherein the handover command includes the first indication information and the second indication information.

5 . The method of claim 1 , wherein sending the M compressed data packets comprises sending the M compressed data packets to a first network device, and wherein sending the N compressed data packets comprises sending the N compressed data packets to the first network device.

6 . The method of claim 4 , wherein sending the M compressed data packets comprises sending the M compressed data packets to a first network device, wherein the method further comprises:

accessing the first network device before the terminal device performs a cell handover based on the handover command; and

accessing a second network device after the terminal device performs the cell handover,

wherein sending the N compressed data packets comprises sending the N compressed data packets to the second network device.

7 . A method applied to a first network device or a chip for the first network device, and comprising:

receiving K compressed data packets from a terminal device, wherein the K compressed data packets are based on compression of K data packets and based on a first buffer, and wherein K is a positive integer;

sending a first indication information and a second indication information, wherein the first indication information indicates the terminal device to reestablish a packet data convergence protocol layer, and wherein the second indication information indicates the terminal device to continue to use the first buffer;

reestablishing the packet data convergence protocol layer without resetting a second buffer; and

decompressing, using the second buffer, one of the K compressed data packets.

8 . The method of claim 7 , further comprising:

sending the K compressed data packets to a second network device; and

receiving, from the terminal device, an access request before the terminal device performs a cell handover.

9 . The method of claim 8 , further comprising:

sending indication information to the second network device, wherein the indication information indicates content of the second buffer, wherein the content of the second buffer updates a third buffer; and

receiving, from the terminal device, the access request before the terminal device performs the cell handover.

10 . The method of claim 8 , further comprising:

sending, to the second network device, a first message querying whether the terminal device is supported in continuing to use the first buffer;

receiving, from the terminal device, the access request before the terminal device performs the cell handover; and

receiving, from the second network device, a second message indicating that the terminal device is supported in continuing to use the first buffer.

11 . The method of claim 7 , further comprising sending, to the terminal device, a status report indicating that the first network device has received the K compressed data packets.

12 . The method of claim 11 , further comprising receiving N compressed data packets from the terminal device, wherein the N compressed data packets are a part or all of M compressed data packets, wherein the K compressed data packets are a part or all of the M compressed data packets, wherein sequence numbers of the M compressed data packets are consecutive, wherein the M compressed data packets are based on compression of M data packets and based on the first buffer, wherein M is a positive integer, wherein N is a positive integer less than or equal to M, and wherein K is a positive integer less than or equal to M.

13 . The method of claim 12 , wherein a first data packet with a smallest sequence number in the N compressed data packets is the same as a second data packet with a smallest sequence number in data packets that are not successfully received by the first network device.

14 . The method of claim 7 , further comprising receiving, from the terminal device, capability information indicating that the terminal device supports continuing to use the first buffer.

15 . A communication apparatus comprising:

at least one processor; and

at least one memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:

obtain M compressed data packets by compressing M data packets based on a first buffer, wherein M is a positive integer;

send the M compressed data packets;

receive a first indication information and a second indication information, wherein the first indication information indicates to reestablish a packet data convergence protocol layer, and wherein the second indication information indicates to continue to use the first buffer;

reestablish the packet data convergence protocol layer without resetting the first buffer; and

send N compressed data packets,

wherein the N compressed data packets are at least a portion of the M compressed data packets, and

wherein N is a positive integer less than or equal to M.

16 . The communication apparatus of claim 15 , wherein a first data packet with a smallest sequence number in the N compressed data packets is the same as a second data packet with a smallest sequence number in data packets that are not successfully received by a network device.

17 . The communication apparatus of claim 15 , wherein the at least one processor is further configured to execute the programming instructions to send capability information indicating that continuing to use the first buffer is supported.

18 . The communication apparatus of claim 15 , wherein the at least one processor is further configured to execute the programming instructions to receive the first indication information and the second indication information by receiving a handover command, wherein the handover command includes the first indication information and the second indication information.

19 . The communication apparatus of claim 18 , wherein the at least one processor is further configured to execute the programming instructions to send the M compressed data packets to a first network device by:

accessing the first network device before the communication apparatus performs a cell handover based on the handover command; and

accessing a second network device after the communication apparatus performs the cell handover, and

wherein the at least one processor to is further configured to execute the programming instructions to send the N compressed data packets by sending the N compressed data packets to the second network device.

20 . The communication apparatus of claim 15 , wherein the at least one processor is further configured to execute the programming instructions to:

send the M compressed data packets by sending the M compressed data packets to a first network device; and

send the N compressed data packets by sending the N compressed data packets to the first network device.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (29)