Data transmission method, device and system

Abstract

The invention discloses a data transmission method, device and system. The method comprises the steps that a terminal sends a wireless connection reestablishment request to a network side device; the terminal sends a wireless connection reestablishment accomplishment message to the network side device according to a wireless connection reestablishment message received from the network side device, wherein the wireless connection reestablishment accomplishment message, the wireless connection reestablishment request message and the wireless connection reestablishment message satisfy at least one of the conditions that the wireless connection reestablishment accomplishment message carries uplink data, the wireless connection reestablishment request message carries first security information and the wireless connection reestablishment message carries second security information and / or indication information for indicating that the second security information is invalid. According to the data transmission method, device and system provided by the invention, data transmission can be rapidly recovered through wireless connection reestablishment.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method, device and system. Background technique [0002] Machine-to-machine (M2M, Machine to Machine) communication is an important topic in the current research of the fifth generation mobile communication technology (5G), and it is also an important application field of future wireless communication. In the M2M communication topic, aiming at the characteristics of low-cost and low-throughput terminals, a research sub-topic of narrowband Internet of Things (NB-IoT, Narrow Band-Internet of Things) is proposed: that is, NB-IoT in the 200khz frequency band Low-cost terminals provide low-throughput wireless communication services. [0003] The NB-IoT system mainly considers scenarios that support ultra-low bandwidth, small data packets, deep coverage, delay tolerance, and ultra-long standby time; currently, the NB-IoT system is built based on Long Term Evolutio...

AI Technical Summary

Problems solved by technology

[0007] In the existing process, since the wireless connection re-establishment operation needs to be performed after the access layer security is activated, but for the control plane data transmission scheme (for details, please refer to 3GPP TS36.331, the data is transmitted through the control plane, and the data plane is not established. For example, the air interface only establishes wireless signaling bearer SRB but does not establish wireless data bearer DRB), only supports the use of non-access layer security operations, and does not support the use of access layer security operations, so in 3GPP R13 version, for the use of control plane data The Internet of Things system of the transmission scheme cannot support wireless connection re-establishment operations

However, considering the mobility scenario of the terminal, the terminal using the control plane data transmission scheme of the 3GPP R13 version will cause some data loss and take longer to resume data transmission when moving to the adjacent cell, resulting in increased power consumption of the terminal and user experience decline

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