Terminal Device Data Transmission After Power Saving Mode
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Solution Overview
Problem
After a terminal device emerges from a power saving mode (PSM), there is a risk that the network-side device may not be in a receiving state when the terminal device sends data, due to potential changes in their relative locations.
Innovation Solution
A data transmission method where a terminal device receives indication information from a network-side device to determine a receiving time period after the PSM, and then obtains a timing advance (TA) value within that period to ensure the network-side device is in a receiving state before sending data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal device uses the TA value before PSM to send data after PSM, then the terminal device can directly access the network, but the network-side device may not be in a receiving state causing data loss
Solution Approach 1:
The terminal device performs preliminary actions by obtaining the current TA value before sending data after PSM. The network-side device sends indication information to indicate a receiving time period, and the terminal device obtains the current TA value within this period, ensuring the network is ready to receive data before the actual transmission occurs.
2Reliability
If the terminal device obtains current TA value after PSM, then data reception reliability is ensured, but additional time and resources are consumed
Solution Approach 1:
The network-side device sends indication information indicating a receiving time period before the actual data transmission. The terminal device obtains the current TA value within this pre-indicated period, performing the timing adjustment in advance to ensure reliability while minimizing time consumption.
Solution Approach 2:
The network-side device provides feedback through indication information that tells the terminal device when the network will be ready to receive data. This feedback mechanism allows the terminal to efficiently obtain the current TA value at the appropriate time, balancing reliability with time efficiency.
Data Source
AI summary
This application provides an example data transmission method, a related example device, and an example system. One example method may include receiving, by a terminal device, indication information sent by a network-side device, where the indication information is used to indicate a receiving time period, and the receiving time period is after a power saving mode (PSM) period. The method also includes obtaining, by the terminal device, a timing advance (TA) value in the receiving time period. The method also includes sending, by the terminal device, data to the network-side device based on the TA value.