Uplink Timing Advance Adjustment for Synchronization
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Solution Overview
Problem
Current communication technologies experience long delays and low efficiency when sending uplink data or performing uplink HARQ feedback due to the complex uplink synchronization process, which requires a random access process for re-establishing synchronization.
Innovation Solution
A method and apparatus that determine and adjust timing advance information to enable user equipment to send uplink information without the need for a random access process, allowing for synchronization without interacting with the network side device directly, thereby reducing delays and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs a random access process to implement uplink synchronization before sending uplink data or HARQ feedback, then uplink synchronization is achieved, but the delay increases and efficiency decreases
Solution Approach 1:
The network side device sends timing advance information to the UE in advance through MAC CE or physical layer signaling, enabling the UE to perform uplink synchronization before actually needing to send uplink data or HARQ feedback. This preliminary provision of synchronization information eliminates the need for time-consuming random access procedures when uplink data arrives or HARQ feedback needs to be sent.
2Reliability
If the UE performs a random access process to implement uplink synchronization before sending uplink data or HARQ feedback, then uplink synchronization is achieved, but the process complexity increases
Solution Approach 1:
The invention extracts the timing advance information provision from the random access process and implements it as a separate, independent mechanism through MAC CE or physical layer signaling. This separation allows the UE to obtain synchronization information without undergoing the complex multi-step random access procedure, thereby reducing process complexity while maintaining synchronization reliability.
3Productivity
If the UE sends uplink information without performing random access by using timing advance information, then the delay is reduced and efficiency is improved, but resource conflicts may occur
Solution Approach 1:
The network side device sends timing advance information to the UE through MAC CE or physical layer signaling, providing feedback that enables the UE to adjust its uplink transmission timing. This feedback mechanism allows the network to coordinate resource allocation and timing advance values for multiple UEs, preventing uplink resource conflicts while enabling efficient direct uplink transmission without random access.
Data Source
AI summary
An uplink information sending methods and apparatus are provided. A communication device includes a processor coupled to a non-transitory memory, where the non-transitory memory stores an execution instruction to be executed in the processor. The execution instruction when executed enables the communication device to determine scheduling information and timing advance information. The scheduling information is used to instruct user equipment to send uplink information, and the timing advance information is used to adjust a timing advance used when the user equipment sends the uplink information. The execution instruction when executed further enables the communication device to adjust the timing advance according to the timing advance information, and send the uplink information according to the scheduling information by using an adjusted timing advance.