Configurable Subframe Structure for 5G TDD Legacy Coexistence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy and 5G wireless communication networks experience interference due to differences in transmission durations and lack of support for self-contained subframes, leading to increased latency and cochannel interference.
Innovation Solution
A configurable subframe structure is implemented in 5G networks to align downlink and uplink portions with corresponding legacy subframes, allowing for simultaneous transmission and minimizing interference by adjusting transmission times and powers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If 5G networks utilize spontaneous switching of link directions and self-contained subframe configurations to meet low latency demands, then latency is reduced, but interference with legacy networks increases
Solution Approach 1:
The patent implements dynamic TDD configuration where the 5G network can flexibly switch between different uplink-downlink configurations based on traffic demands. This allows the system to adapt transmission directions dynamically while coordinating with legacy networks to minimize interference, resolving the contradiction between low latency requirements and interference avoidance
Solution Approach 2:
The patent changes the time domain parameters of TDD frames by introducing configurable subframe structures with different uplink-downlink patterns. By adjusting these parameters dynamically and coordinating with legacy networks, the system achieves low latency for 5G traffic while preventing interference with legacy transmissions
2Stability of the object's composition
If legacy networks utilize large downlink and uplink transmission durations to minimize link direction switching, then link stability is improved, but latency in 5G networks increases
Solution Approach 1:
The patent segments the TDD frame structure into smaller, more flexible subframes that can be independently configured. This segmentation allows 5G networks to create shorter transmission time intervals for low latency while legacy networks maintain their longer transmission durations, enabling both link stability and low latency requirements to be met simultaneously
Solution Approach 2:
The patent implements dynamic configuration where different subframes can have different uplink-downlink directions based on immediate traffic needs. This dynamic approach allows legacy networks to maintain stable long-duration transmissions when needed while 5G networks can switch rapidly to achieve low latency, resolving the contradiction between link stability and latency
3Loss of time
If 5G networks implement self-contained subframe configurations to reduce retransmission timeline, then retransmission latency is reduced, but coordination complexity with legacy networks increases
Solution Approach 1:
The patent creates a universal TDD configuration framework that can accommodate both legacy and 5G requirements. By defining a set of standardized TDD configurations that work for both network types, the system enables self-contained subframes for low retransmission latency while maintaining manageable coordination complexity through standardized patterns
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects of the disclosure relate to a configurable subframe structure for use in next generation (e.g., fifth generation or 5G) wireless networks utilizing a time division duplex (TDD) carrier that minimizes interference with adjacent legacy wireless networks. The configurable subframe structure may be configured to produce next generation subframes, each including at least one of a downlink portion or an uplink portion, to substantially align downlink portions with corresponding legacy downlink subframes and/or uplink portions with corresponding legacy uplink subframes.