Packet transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-2021227492-A1
Application number	US-202117224339-A
Country	US
Kind code	A1
Filing date	Apr 7, 2021
Priority date	Oct 9, 2018
Publication date	Jul 22, 2021
Grant date	—

Abstract

This application provides a packet transmission method includes: receiving from a first session management network element, a first message including an address of a first terminal device and an identifier of a first user plane network element servicing for the first terminal device; receiving from a second session management network element, a second message including an address of a second terminal device and an identifier of a second user plane network element servicing for the second terminal device; determining, that the first terminal device and the second terminal device belong to a same local area network group; sending to the first session management network element,the identifier of the second user plane network element and the address of the second terminal device; and sending to the second session management network element, the identifier of the first user plane network element and the address of the first terminal device.

First claim

What is claimed is:

1 . A packet transmission apparatus, comprising:
a non-transitory memory and at least one processor coupled to the memory, wherein the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to: receive a first message sent by a first session management network element, wherein the first message comprises an address of a first terminal device and an identifier of a first user plane network element that provides a local area network LAN service for the first terminal device; and receive a second message sent by a second session management network element, wherein the second message comprises an address of a second terminal device and an identifier of a second user plane network element that provides the LAN service for the second terminal device; determine that the first terminal device and the second terminal device belong to a same local area network group; and send a first notification message to the first session management network element, wherein the first notification message comprises the identifier of the second user plane network element and the address of the second terminal device; and send a second notification message to the second session management network element, wherein the second notification message comprises the identifier of the first user plane network element and the address of the first terminal device.

2 . The apparatus according to claim 1 , wherein the first notification message further comprises an identifier of the second session management network element, and the second notification message further comprises an identifier of the first session management network element.

3 . The apparatus according to claim 1 , wherein the first message comprises an identifier of the first terminal device, and the second message comprises an identifier of the second terminal device; and the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to determine, based on the identifier of the first terminal device and the identifier of the second terminal device, that the first terminal device and the second terminal device belong to the same local area network group.

4 . A packet transmission apparatus, comprising:
a non-transitory memory and at least one processor coupled to the memory, wherein the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to: receive a first forwarding policy from a first session management network element, wherein the first forwarding policy is used to indicate a forwarding policy of a local area network LAN service-related packet of a first terminal device; the first forwarding policy is that when receiving a packet from the first terminal device and a destination address of the packet is an address of a second terminal device, the first user plane network element forwards the packet to a second user plane network element; and the first user plane network element provides a LAN service for the first terminal device,receive a packet from the first terminal device; and when a destination address of the packet is the address of the second terminal device, forward the packet to the second user plane network element according to the first forwarding policy.

5 . The apparatus according to claim 4 , wherein the first forwarding policy comprises the address of the second terminal device and information about the second user plane network element.

6 . The apparatus according to claim 5 , wherein the information about the second user plane network element comprises an address of the second user plane network element, and the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:
forward the packet to the second user plane network element indicated by the address of the second user plane network element.

7 . The apparatus according to claim 5 , wherein the information about the second user plane network element comprises a forwarding tunnel identifier of the second user plane network element, and the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:
forward the packet to the second user plane network element through a forwarding tunnel identified by the forwarding tunnel identifier of the second user plane network element.

8 . The apparatus according to claim 5 , wherein the information about the second user plane network element comprises an IP address of the second user plane network element, and the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:
encapsulate the packet into an IP packet and send the IP packet to an external network, wherein a destination address of the IP packet is the IP address of the second user plane network element; and route, through the external network, the IP packet to the second user plane network element indicated by the IP address of the second user plane network element.

9 . A packet transmission apparatus, comprising:
a non-transitory memory and at least one processor coupled to the memory, wherein the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to: send a first message to a group management network element, wherein the first message comprises an identifier of a first terminal device, an address of the first terminal device, and an identifier of a first user plane network element that provides a local area network LAN service for the first terminal device; receive a first notification message sent by the group management network element, wherein the first notification message comprises an identifier of a second user plane network element and an address of a second terminal device, the second terminal device and the first terminal device belong to a same local area network group, and the second user plane network element provides the LAN service for the second terminal device; and generate a first forwarding policy based on the first notification message, wherein send the first forwarding policy to the first user plane network element, wherein the first forwarding policy is that when receiving a packet from the first terminal device and a destination address of the packet is the address of the second terminal device, the first user plane network element forwards the packet to the second user plane network element.

10 . The apparatus according to claim 9 , wherein the first forwarding policy comprises the address of the second terminal device and information about the second user plane network element.

11 . The apparatus according to claim 10 , wherein the information about the second user plane network element comprises a forwarding tunnel identifier of the second user plane network element, the first notification message further comprises an identifier of a second session management network element, and the at least one processor is configured to execute instructions stored in the memory to cause the apparatus to:
before generating the first forwarding policy based on the first notification message, establish a forwarding tunnel between the first user plane network element and the second user plane network element, and obtain the forwarding tunnel identifier of the second user plane network element, wherein the first forwarding policy is that when receiving a packet from the first terminal device and a destination address of the packet is the address of the second terminal device, the first user plane network element forwards the packet to the second user plane network element through a forwarding tunnel i

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Yuan
• Chen Zhongping

Classifications

• H04W8/26

  Network addressing or numbering for mobility support · CPC title

• H04L45/74 Primary

  Address processing for routing · CPC title

• H04L45/42

  Centralised routing · CPC title

• H04W76/40

  for selective distribution or broadcast · CPC title

• H04W76/11

  Allocation or use of connection identifiers · CPC title