Communication method, device, and system

Patent metadata

Field	Value
Publication number	US-2020280873-A1
Application number	US-202016828680-A
Country	US
Kind code	A1
Filing date	Mar 24, 2020
Priority date	Oct 31, 2017
Publication date	Sep 3, 2020
Grant date	—

Abstract

Embodiments of this application provide a communication method, a device, and a system, to resolve an out-of-order problem caused by per-packet traffic splitting. The method includes: determining, by a sending device, a sequence identifier of a to-be-transmitted data packet and an identifier of a first link for transmitting the data packet; and sending, by the sending device, the data packet to a receiving device, where a header of the data packet includes the identifier of the first link and the sequence identifier, the identifier of the first link is used to identify the first link, and the sequence identifier is used to identify a sending order of the data packet over the first link or in a link group to which the first link belongs.

First claim

What is claimed is:

1 . A communication method, comprising:
determining, by a sending device, a sequence identifier of a data packet to-be-transmitted and an identifier of a first link for transmitting the data packet; and sending, by the sending device, the data packet to a receiving device, wherein a header of the data packet comprises the identifier of the first link and the sequence identifier, the identifier of the first link is used to identify the first link, and the sequence identifier is used to identify a sending order of the data packet over the first link or in a link group to which the first link belongs.

2 . The method according to claim 1 , wherein determining, by a sending device, an identifier of a first link for transmitting the data packet comprises:
determining, by the sending device based on a correspondence between the identifier of the first link and a service flow identifier, the identifier of the first link for transmitting the data packet, wherein the service flow identifier is used to identify a service flow to which the data packet belongs.

3 . The method according to claim 2 , wherein the service flow identifier comprises a 5-tuple, a quality of service flow identifier (QFI), or a service flow identifier at a session granularity.

4 . The method according to claim 3 , wherein determining, by the sending device based on a correspondence between the identifier of the first link and a service flow identifier, the identifier of the first link for transmitting the data packet comprises:
determining, by the sending device based on a 5-tuple of the data packet and a correspondence between the identifier of the first link and the 5-tuple, the identifier of the first link for transmitting the data packet.

5 . The method according to claim 3 , wherein determining, by the sending device based on a correspondence between the identifier of the first link and a service flow identifier, the identifier of the first link for transmitting the data packet comprises:
determining, by the sending device, the service flow identifier based on a 5-tuple of the data packet; and determining, by the sending device based on the service flow identifier and the correspondence between the identifier of the first link and the service flow identifier, the identifier of the first link for transmitting the data packet.

6 . The method according to claim 2 , wherein the method further comprises:
receiving, by the sending device from a session management entity, the correspondence between the identifier of the first link and the service flow identifier, wherein the identifier of the first link is allocated by the session management entity.

7 . The method according to claim 2 , wherein when the sending device is a user plane function entity, the identifier of the first link is allocated by a terminal; or when the sending device is a terminal, the identifier of the first link is allocated by a session management entity.

8 . The method according to claim 2 , wherein the first link corresponds to a first access device and a second access device, the first access device is an access device corresponding to a first access technology, and the second access device is an access device corresponding to a second access technology.

9 . The method according to claim 8 , further comprising:
establishing, by the sending device, a correspondence between the identifier of the first link, information of the first access device, and information of the second access device.

10 . The method according to claim 1 , wherein determining, by a sending device, an identifier of a first link for transmitting the data packet comprises:
determining, by the sending device based on a correspondence between a service flow identifier and identifiers of a plurality of links in the link group, the identifier of the first link for transmitting the data packet, wherein the service flow identifier is used to identify a service flow to which the data packet belongs.

11 . The method according to claim 10 , wherein the service flow identifier comprises a 5-tuple, a QFI, or a service flow identifier at a session granularity.

12 . The method according to claim 11 , wherein determining, by the sending device based on a correspondence between a service flow identifier and identifiers of a plurality of links in the link group, the identifier of the first link for transmitting the data packet comprises:
determining, by the sending device based on a 5-tuple of the data packet and a correspondence between the 5-tuple and the identifiers of the plurality of links in the link group, the identifier of the first link for transmitting the data packet.

13 . The method according to claim 11 , wherein determining, by the sending device based on a correspondence between a service flow identifier and identifiers of a plurality of links in the link group, the identifier of the first link for transmitting the data packet comprises:
determining, by the sending device, the service flow identifier based on a 5-tuple of the data packet; and determining, by the sending device based on the service flow identifier and the correspondence between the service flow identifier and the identifiers of the plurality of links in the link group, the identifier of the first link for transmitting the data packet.

14 . The method according to claim 10 , wherein the sending device is a terminal, the link group comprises the first link and a second link, and the method further comprises:
sending, by the sending device, the identifier of the first link to a session management entity during establishment of the second link, wherein the first link is an established link; receiving, by the sending device from the session management entity, a correspondence between the identifier of the first link and an identifier of the second link, wherein the identifier of the first link is allocated by the session management entity; and establishing, by the sending device, a correspondence between the service flow identifier, the identifier of the first link, and the identifier of the second link.

15 . The method according to claim 10 , wherein the sending device is a user plane function entity, the link group comprises the first link and a second link, and the method further comprises:
receiving, by the sending device from a session management entity, a correspondence between the identifier of the first link and an identifier of the second link during establishment of the second link, wherein the identifier of the first link is allocated by the terminal or the identifier of the first link is allocated by the session management entity, and the first link is an established link; and establishing, by the sending device, a correspondence between the service flow identifier, the identifier of the first link, and the identifier of the second link.

16 . The method according to claim 10 , wherein the first link corresponds to a first access device or a second access device, the first access device is an access device corresponding to a first access technology, and the second access device is an access device corresponding to a second access technology.

17 . The method according to claim 16 , further comprising:
establishing, by the sending device, a correspondence between the identifier of the first link and information of the first access device, and a correspondence between the identifier of the second link and information of the second access device.

18 . The method according to claim 1 , wherein links in the link gr

Assignees

• Huawei Tech Co Ltd

Inventors

• Yan Chunxiang
• Yu Youyang
• Wu Wenfu

Classifications

• H04L45/38

  Flow based routing · CPC title

• H04W76/11

  Allocation or use of connection identifiers · CPC title

• H04W28/0268 Primary

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title

• H04L45/74

  Address processing for routing · CPC title

• H04W76/12

  Setup of transport tunnels · CPC title