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Data transmission method, device and system

A data transmission method and data technology, applied in the field of communication, can solve problems such as inability to complete data packet reordering, inability to complete correct data reception, etc.

Active Publication Date: 2017-04-12
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, when UE2 receives the above PDCP0', PDCP1', PDCP2' and PDCP3', it cannot complete the reordering of the data packets after the handover and the data packets before the handover, so that the correct reception of the data cannot be completed.

Method used

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  • Data transmission method, device and system
  • Data transmission method, device and system
  • Data transmission method, device and system

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Embodiment Construction

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0061] see Figure 4 , a data transmission method provided by an embodiment of the present invention, comprising the following steps:

[0062] S41, switching from the device-to-device D2D communication mode to the cellular (cell for short) communication mode;

[0063] S42. Encapsulate the unsuccessfully delivered data packet in the D2D communication into a cellular communication data packet, the encapsulated data packet includes indication information, and the ind...

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Abstract

A data transmission method is disclosed in the present invention, which includes: switching from a Device to Device (D2D) communication mode to a cell communication mode; packaging a data package failed to be transmitted in the D2D communication to a cell communication package; the packaged data packet includes indication information; said indication information is used to indicate that said packaged data packet is the one failed to be transmitted in the D2D communication, and is the divided data packet of an origin D2D communication data packet, and the sequence of the divided data packet in the origin D2D communication data packet; sending the packaged data packet to a data receiving device, wherein, said indication information is used by said data receiving device to perform identification process for the data packet. A data sending device, a data receiving device and a data transmission system are also disclosed in the present invention. By applying the embodiments of the present invention, the lossless switching from the D2D communication mode to the cell communication mode is enabled, and the correct receiving of data is implemented.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method, device and system. Background technique [0002] The Internet of Things refers to the deployment of various devices with certain perception, calculation, execution and communication capabilities to obtain information in the physical world, and to realize information transmission, collaboration and processing through the network, thereby realizing the interconnection between people and things, and things and things. The internet. In short, the Internet of Things is to realize the interconnection between people and things, things and things. Its applications include various aspects such as smart grid, smart agriculture, smart transportation, and environmental detection. The development of the Internet of Things is known as the third wave of the information industry after computers and the Internet. It has high hopes and is greatly sought...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/06H04W36/14
CPCH04W28/06
Inventor 张向东常俊仁
Owner HUAWEI TECH CO LTD
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