Granted Patent B2

US 12,598,523 · App. 18/344,426 · Granted Apr 7, 2026

Inventors: Bin Xu (Beijing, CN); Bingzhao Li (Beijing, CN); Zhenzhen Cao (Boulogne Billancourt, FR); Yan Wang (Beijing, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04W36/026H04W36/0007H04W36/0016

Abstract

Claims (55)

1 . A data transmission method, comprising:

receiving, by a first access network device, local service indication information and a service identifier from a core network device, wherein the local service indication information indicates that a service to which a data packet of a first session belongs is a local service, wherein the local service indication information is received to reduce data packets lost in a handover process of user equipment;

sending, by the first access network device, third indication information to a second access network device, wherein the third indication information indicates that the service is the local service; and

determining, by the first access network device based on the third indication information, whether the second access network device belongs to a same local area of the local service as the first access network device.

2 . The data transmission method according to claim 1 , further comprising:

receiving, by the first access network device, local area information from the core network device, wherein the local area information comprises a cell identifier, a tracking area identifier, or a base station identifier associated with at least one local area corresponding to the local service.

3 . The data transmission method according to claim 1 , wherein

receiving, by the first access network device, indication information from the core network device that indicates a local area to which the first access network device belongs.

4 . The data transmission method according to claim 1 , wherein

the third indication information further indicates a local area to which the first access network device belongs.

5 . The data transmission method according to claim 1 , wherein

the sending, by the first access network device, the third indication information to the second access network device comprises:

sending, by the first access network device, the third indication information to the second access network device in response to a terminal device being handed over from the first access network device to the second access network device.

6 . A data transmission method, comprising:

generating, by a core network device, first indication information indicating a mapping relationship from a quality of service (QoS) flow of a first session to a radio bearer;

sending, by the core network device, local service indication information and a service identifier to a first access network device, wherein the local service indication information indicates that a service to which a data packet of the first session belongs is a local service; and

sending, by the core network device, local area information to the first access network device, wherein the local area information comprises a cell identifier, a tracking area identifier, or a base station identifier associated with at least one local area corresponding to the local service,

wherein when the first access network device and a second access network device belong to a same local area of the local service, the core network device sets general packet radio service tunneling protocol user plane (GTP-U) serial numbers of same data packets sent to the first access network device and the second access network device to be the same.

7 . The data transmission method according to claim 6 , wherein

the core network device sends, to the first access network device, indication information that indicates a local area to which the first access network device belongs.

8 . A data transmission method, comprising:

receiving, by a second access network device, third indication information from a first access network device, wherein the third indication information indicates that a service to which a data packet of a first session belongs is a local service, and indicates a local area to which the first access network device belongs;

determining, by the second access network device based on the third indication information, that the local area to which the first access network device belongs and a local area to which the second access network device belongs are different local areas; and

in response to the local area to which the first access network device belongs and the local area to which the second access network device belongs being different local areas, determining, by the second access network device, to skip performing a data forwarding procedure for the first session.

9 . The data transmission method according to claim 8 , further comprising:

allocating, to the first access network device, forwarding tunnel information used for data forwarding; and

configuring a packet data convergence protocol status report in a handover request acknowledgment message.

10 . An apparatus, comprising:

one or more processors configured to:

receive local service indication information and a service identifier from a core network device, wherein the local service indication information indicates that a service to which a data packet of a first session belongs is a local service, wherein the local service indication information is received to reduce data packets lost in a handover process of user equipment;

send third indication information to a second access network device, wherein the third indication information indicates that the service is the local service; and

determine, based on the third indication information, whether the second access network device belongs to a same local area of the local service as the apparatus.

11 . The apparatus according to claim 10 , wherein the one or more processors are further configured to:

receive local area information from the core network device, wherein the local area information comprises a cell identifier, a tracking area identifier, or a base station identifier associated with at least one local area corresponding to the local service.

12 . The apparatus according to claim 10 , wherein the one or more processors are further configured to:

receive indication information from the core network device that indicates a local area to which the apparatus belongs.

13 . The apparatus according to claim 10 , wherein the third indication information further indicates a local area to which the apparatus belongs.

14 . The apparatus according to claim 10 , wherein the one or more processors send the third indication information to the second access network device by:

sending the third indication information to the second access network device in response to a terminal device being handed over from the apparatus to the second access network device.

15 . An apparatus, comprising:

one or more processors configured to:

generate first indication information indicating a mapping relationship from a quality of service (QoS) flow of a first session to a radio bearer;

send local service indication information and a service identifier to a first access network device, wherein the local service indication information indicates that a service to which a data packet of the first session belongs is a local service; and

send local area information to the first access network device, wherein the local area information comprises a cell identifier, a tracking area identifier, or a base station identifier associated with at least one local area corresponding to the local service,

wherein when the first access network device and a second access network device belong to a same local area of the local service, the apparatus sets general packet radio service tunneling protocol user plane (GTP-U) serial numbers of same data packets sent to the first access network device and the second access network device to be the same.

16 . The apparatus according to claim 15 , wherein the one or more processors are further configured to:

send to the first access network device, indication information that indicates a local area to which the first access network device belongs.

17 . An apparatus, comprising:

one or more processors configured to:

receive third indication information from a first access network device, wherein the third indication information indicates that a service to which a data packet of a first session belongs is a local service, and indicates a local area to which the first access network device belongs;

determine, based on the third indication information, that the local area to which the first access network device belongs and a local area to which the apparatus belongs are different local areas; and

in response to the local area to which the first access network device belongs and the local area to which the apparatus belongs being different local areas, determine to skip performing a data forwarding procedure for the first session.

18 . The apparatus according to claim 17 , wherein the one of more processors are further configured to:

allocate, to the first access network device, forwarding tunnel information used for data forwarding; and

configure a packet data convergence protocol status report in a handover request acknowledgment message.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (30)