Uplink Slot Scheduling After Measurement Gaps Using TA Feedback
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Solution Overview
Problem
Current uplink scheduling methods result in resource waste and signaling inefficiencies due to the inability to determine whether uplink signals can be sent during the first or second slot after a measurement gap in TDD carriers, leading to unsynchronized terminal communications.
Innovation Solution
A method where a terminal obtains and reports a timing advance (TA) duration to a base station, allowing the base station to schedule uplink grants on appropriate slots after a measurement gap, thereby avoiding resource waste and signaling inefficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal performs inter-frequency measurement using two types of RF receivers, then measurement capability is improved, but device cost increases and interference between different frequencies occurs
Solution Approach 1:
The patent combines the measurement gap mechanism with uplink scheduling by determining target uplink slots based on TA duration. The terminal uses a single RF receiver and schedules uplink transmissions in specific slots after the measurement gap, merging measurement functionality with existing uplink resources without adding hardware complexity
Solution Approach 2:
The base station performs preliminary action by measuring and sending TA duration before the measurement gap. The terminal then uses this pre-obtained TA information to determine which uplink slots are suitable for transmissions after the gap, avoiding the need for complex RF receiver configurations
2Ease of manufacture
If the base station schedules uplink grants on slots after measurement gap without considering TA duration, then scheduling simplicity is improved, but resource waste and signaling inefficiency occur
Solution Approach 1:
The terminal feeds back the TA duration information to the base station, which then uses this feedback to determine appropriate target uplink slots. This feedback mechanism enables the base station to schedule uplink grants efficiently without adding complex scheduling algorithms, maintaining simplicity while improving resource utilization
Solution Approach 2:
The patent changes the scheduling parameter from fixed slot allocation to dynamic slot selection based on TA duration. The base station adjusts the target uplink slot selection according to the measured TA value, optimizing resource allocation without complicating the overall scheduling process
3Productivity
If the terminal determines target uplink slots based on TA duration, then uplink scheduling efficiency is improved, but terminal processing complexity increases
Solution Approach 1:
The terminal performs partial processing by only determining the target uplink slots based on TA duration rather than performing complete scheduling calculations. The heavy lifting of TA measurement is done by the base station, and the terminal only needs to interpret the TA value and select appropriate slots, reducing terminal processing complexity while maintaining scheduling efficiency
Data Source
AI summary
An uplink scheduling method, an apparatus, and a storage medium that improves scheduling in a wireless communication network. The scheduling is improved by obtaining a first timing advance (TA) duration for a terminal measured and sent by a base station; determining a number of target uplink slots based on the first TA duration, where the target uplink slots are one or more uplink slots after a measurement gap during which signal transmissions are not able to be conducted; and reporting the number of the target uplink slots to the base station.