Uplink Scheduling After Position Validity Expiry
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Solution Overview
Problem
In scenarios involving uplink synchronization pre-compensation based on timing advance (TA), terminals face delays due to the expiration of location information validity, leading to the need to leave the connected state and re-enter, causing transmission delays.
Innovation Solution
Terminals continue uplink transmissions based on scheduling commands after location information validity expires, remaining in the connected state to avoid delays, and may extend the validity time period based on network device indications or configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal enters idle or inactive state when location information validity expires, then the terminal can maintain proper synchronization, but uplink transmission delay increases
Solution Approach 1:
The terminal dynamically adjusts its state transition behavior based on the expiration of location information validity. Instead of statically entering idle/inactive state, the terminal remains in connected state and dynamically performs uplink transmission using stored timing advance values, adapting the system behavior to the specific condition of location information expiration.
Solution Approach 2:
The terminal performs preliminary actions by storing timing advance values before location information expires. These pre-stored TA values are then used to maintain uplink synchronization after expiration, avoiding the need to re-enter connected state and enabling continuous transmission without delay.
2Productivity
If the terminal remains in connected state after location information validity expires, then uplink transmission continuity is maintained, but timing advance accuracy deteriorates
Solution Approach 1:
The terminal prepares cushioning measures in advance by storing multiple timing advance values corresponding to different locations before location information expires. When expiration occurs, these pre-stored TA values serve as a buffer, allowing the terminal to continue accurate uplink transmission without immediately losing synchronization precision.
Solution Approach 2:
The terminal changes the parameter of timing advance by selecting from multiple pre-stored TA values based on current location conditions. Instead of using a single static TA value, the system dynamically selects the most appropriate TA from stored options, maintaining accuracy despite location information expiration.
Data Source
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AI summary
The present disclosure relates to the technical field of communication, and specifically relates to a communication method, a communication apparatus, a communication device, a communication system, and a storage medium, wherein the communication method comprises: determining that a position information validity period has expired, and based on a scheduling instruction, executing uplink transmission (S201). The present disclosure allows a terminal, after determining that a position information validity period has expired, to continue in a connected state without entering an idle state or inactive state, thereby allowing for continuing to perform uplink transmission on the basis of a network device scheduling instruction, and helping to avoid uplink transmission delay.