Data transmission method and device

Abstract

An embodiment of the present application provides a data transmission method and device, the method including: acquiring uplink resources when the first logical channel triggers a pending SR, wherein the first logical channel is not matched to any scheduling request configuration and send the buffer status information of the first logical channel on the uplink resource; then cancel the pending SR triggered on the first logical channel, so that the physical uplink indicated by the uplink authorization obtained through non-random access The buffer state information of the first logical channel is sent by using the PUSCH resource of the road shared channel, which prevents the terminal device from performing random access, thereby improving service continuity on the logical channel.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a data transmission method and device. Background technique [0002] With the rapid development of wireless communication technology, the fifth generation (5th Generation, 5G) wireless communication technology has become a hot spot in the industry at present. 5G wireless communication technology is an extension of the fourth generation (4th Generation, 4G) wireless communication technology. Therefore, the 5G communication system is called "super 4G network", or "post-long term evolution (Long Term Evolution, LTE) system", or new air interface (New Radio, NR). [0003] During the data transmission process, the network device can configure multiple logical channels (LogicalChannel, logical channel) for the terminal equipment. Channel, PUSCH) resource, the terminal device may be triggered to send an SR message on the Physical Uplink Control Channel (Physical U...

AI Technical Summary

Problems solved by technology

If the currently activated Active UL bandwidth part (Bandwidth Part, BWP) is not configured with a Physical Random Access Channel (Physical Random Access Channel, PRACH) PRACH resource, the terminal device will switch to the initial Initial UplinkBWP for random access, and It will switch the Active downlink (Downlink DL) BWP to Initial DownlinkBWP, causing the DL BWP on the terminal device side to change; if the current Active UL BWP is configured with PRACH resources, the terminal device will switch the Active DL BWP to the same as the Active UL BWP On the DL BWP with the same BWP ID, in a Frequency Division Duplex (FDD) system, since the Active DL BWP ID is not necessarily the same as the Active UL BWP ID, the Active DL BWP of the terminal device may change

[0004] Therefore, if the terminal device switches the current Active DLBWP after sending the random access preamble Preamble, when the service corresponding to a logical channel generates downlink data, the network device will continue to send the downlink on the Active DL BWP before the terminal device switches At this time, because the Active DL BWP of the terminal device has changed, the terminal device cannot receive the downlink data, resulting in a freeze or interruption of the service on the logical channel

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