LTE NR Dual-Connected UE Time-Division Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals using both LTE and NR technologies due to interference and compatibility issues, particularly in dual-connected scenarios where LTE and NR resources are not effectively scheduled, leading to suboptimal performance and increased latency.
Innovation Solution
A method for dual-connected user equipment (UE) to schedule and transmit signals by dividing LTE and NR signals in time, using a combination of bands, and applying relaxation techniques during decoding to mitigate interference, while also managing synchronization and radio resource management measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE and NR signals are transmitted simultaneously without time division scheduling, then communication capacity is increased, but interference between LTE and NR signals increases and signal reception quality deteriorates
Solution Approach 1:
The patent segments the transmission time into distinct time regions, allocating specific time slots for LTE signals and NR signals separately. This time-division approach divides the overlapping transmission problem into non-overlapping time segments, eliminating mutual interference while maintaining high communication capacity through efficient resource utilization.
Solution Approach 2:
The patent implements dynamic scheduling that adapts the time region allocation based on traffic conditions and signal requirements. The scheduling mechanism dynamically adjusts which RAT (LTE or NR) transmits in each time region, optimizing resource utilization while preventing interference. This dynamic approach allows the system to maintain high productivity by actively using available time slots.
2Object-affected harmful factors
If LTE and NR resources are effectively scheduled using time division, then signal interference is reduced, but scheduling complexity and device complexity increase
Solution Approach 1:
The patent creates a universal scheduling framework that handles both LTE and NR signals through a common time-division mechanism. The base station and user equipment implement multi-functional scheduling capabilities that can manage different RATs using the same time region allocation principles, reducing the need for separate complex scheduling systems for each RAT and thereby lowering overall device complexity.
Solution Approach 2:
The patent incorporates feedback mechanisms where the user equipment reports reception status and channel conditions to the base station. This feedback enables the base station to optimize time region allocation and scheduling decisions, reducing trial-and-error adjustments and simplifying the scheduling process by making it data-driven rather than purely algorithmic.
3Object-affected harmful factors
If time division scheduling is implemented for LTE and NR signals, then signal reception quality is improved, but transmission latency increases due to sequential transmission
Solution Approach 1:
The patent establishes periodic time region patterns for LTE and NR transmissions, creating predictable transmission cycles. This periodic structure allows receiving devices to anticipate signal arrivals and prepare reception in advance, reducing processing delays. The regular pattern enables efficient buffer management and timing synchronization, minimizing latency while maintaining interference-free sequential transmission.
Solution Approach 2:
The patent performs preliminary scheduling decisions at the base station, pre-allocation of time regions for different RATs based on predicted traffic patterns. This advance planning allows user equipment to pre-configure reception parameters and buffers before actual signal transmission, reducing on-the-fly processing time and minimizing latency despite the sequential nature of time-division multiplexing.
Data Source
AI summary
The present invention relates to signal transmission and reception method and device by an equipment which is dual-connected to a first radio access technology (RAT) and a second RAT in a wireless communication system. The method comprises the steps of: a first signal in accordance with a first RAT and a second signal in accordance with a second RAT being scheduled separately timewise; and transmitting and receiving the first signal and the second signal. The operation for the second signal is determined on the basis of whether or not the second signal reception is scheduled in a first time domain for transmitting the first signal. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.