Downlink Transmission Timing for RRC Inactive Data Buffer Relief
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Solution Overview
Problem
When a terminal device is in radio resource control (RRC) inactive mode, the network device faces high storage burden due to the need to store downlink data until a paging occasion, especially with long discontinuous reception cycles.
Innovation Solution
A data transmission method where a first network device determines a time point for sending downlink data to a second network device based on received first information, such as eDRX cycles and paging time windows, to avoid direct storage at the second network device, thereby reducing storage burden and optimizing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal device uses a long discontinuous reception cycle to save energy, then the terminal device can reduce power consumption, but the storage burden of the network device increases
Solution Approach 1:
The network device sends downlink data to the terminal device in advance, before the terminal device wakes up at the paging occasion. By determining the sending time point based on the first information (eDRX cycle, paging time window), the network device proactively delivers data during the terminal's active period, eliminating the need to store data until the paging occasion and thereby reducing storage burden while allowing the terminal to maintain long sleep cycles for energy saving
Solution Approach 2:
The first information (eDRX cycle, paging time window duration) acts as an intermediary parameter that enables the network device to calculate and determine the optimal data sending time point. This intermediary information bridge allows the network device to synchronize data delivery with the terminal's wake-up schedule without requiring the terminal to frequently wake up, thus resolving the contradiction between energy saving and data delivery timing
Data Source
AI summary
This application provides a data transmission method and apparatus. The method includes: receiving downlink data, where the downlink data is used to be sent to a terminal device; receiving first information from a second network device, where the first information is used to determine a time point for sending the downlink data to the second network device; and sending the downlink data to the second network device based on the first information, to avoid directly sending the downlink data to the second network device after receiving the downlink data, thereby relieving storage burden of the second network device.