Dynamic Uplink Transmission Time Interval Adjustment
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Solution Overview
Problem
Conventional communication systems do not dynamically adjust transmission time intervals (TTIs) during established communication sessions, leading to suboptimal performance and efficiency, as they apply a static TTI to all users in a cell regardless of individual link conditions, which can result in poor communication quality and dropped calls.
Innovation Solution
The system dynamically assigns TTIs to each user equipment (UE) based on specific link conditions, allowing for adjustments between 2ms and 10ms TTIs within an ongoing communication session to optimize performance according to changing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static TTI is applied to all users in a cell, then device complexity is reduced and ease of operation is improved, but communication quality and system performance deteriorate due to inability to adapt to varying link conditions
Solution Approach 1:
The patent implements dynamic TTI adjustment where the transmission time interval is no longer fixed but adapts in real-time based on channel conditions. The system continuously monitors link quality metrics and dynamically selects between different TTI values (e.g., 2ms, 10ms) to optimize performance while maintaining operational simplicity through automated control algorithms.
Solution Approach 2:
The invention changes the TTI parameter dynamically based on communication link conditions. By adjusting this critical timing parameter according to measured channel quality, the system achieves adaptive optimization without requiring complex manual configuration, resolving the contradiction between ease of operation and communication quality.
2Reliability
If a longer TTI (10ms) is used for robust transmissions in poor conditions, then reliability is improved, but transmission throughput and efficiency worsen
Solution Approach 1:
The system dynamically adjusts TTI duration based on real-time channel conditions. When conditions are good, shorter TTIs (2ms) are used to maximize throughput; when conditions deteriorate, longer TTIs (10ms) are selected to ensure reliable transmission. This dynamic adaptation resolves the contradiction by allowing the system to achieve both high throughput and reliability at different times as needed.
Solution Approach 2:
The invention changes the TTI parameter based on measured link quality metrics. By adjusting this parameter dynamically, the system optimizes the trade-off between transmission robustness and throughput efficiency, achieving reliable communication when needed while maximizing data rate when channel conditions permit.
3Productivity
If a shorter TTI (2ms) is used for lower transmission delays and higher throughput, then productivity is improved, but reliability worsens in regions with poor communication linking conditions
Solution Approach 1:
The patent implements dynamic TTI selection that adapts to channel conditions. The system monitors link quality and automatically switches between short TTIs (for high throughput in good conditions) and long TTIs (for reliability in poor conditions), resolving the contradiction by making the TTI duration a dynamic rather than static parameter.
Solution Approach 2:
The invention dynamically changes the TTI parameter based on measured communication link quality. When channel conditions are favorable, the system selects shorter TTIs to maximize throughput; when conditions deteriorate, it switches to longer TTIs to ensure reliable transmission, thus achieving both high productivity and reliability as needed.
4Ease of manufacture
If conventional systems use a common TTI for all transmissions within a NodeB, then device complexity is reduced and ease of manufacture is improved, but adaptability and system performance deteriorate due to inability to individually optimize for multiple users
Solution Approach 1:
The patent segments the cell into multiple user-specific transmission channels, each with its own optimized TTI. Instead of applying a single common TTI to all users, the system independently determines and applies appropriate TTI values for each UE based on their individual link conditions, achieving user-specific optimization while maintaining system-wide coordination.
Solution Approach 2:
The invention applies different TTI parameters to different users within the same cell based on their local channel conditions. Each user receives a customized TTI configuration optimized for their specific communication environment, achieving local optimization without requiring complete system redesign, thus balancing ease of manufacture with adaptability.
Data Source
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AI summary
Systems and methods for dynamically adjusting the transmission time interval (TTI) for a communications system are presented. The described aspects provide for dynamically adjusting the TTI in a communication session between a base station or nodeB and a wireless device or user equipment between a shorter TTI, which can provide increased data throughput and lower power consumption, and a longer TTI, which can provide more rugged communication link connections. By dynamically adjusting the TTI, the communications link can be optimized for the given communication channel conditions. Determinations, based on indicia related to the communications system conditions, can be employed in dynamic TTI adjustment. These determinations can be formed centrally at the Radio Network Controller (RNC), at the RNC supplemented with user equipment (UE) available information, or formed in a distributed manner between the RNC and UE across a communications system.