Short TTI Resource Allocation for Ultra-Low Latency Wireless
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Solution Overview
Problem
Current wireless communication technologies, such as 3GPP LTE, face inefficiencies in scalability, deployment, and protocols for communication between user equipment (UE) and eNodeB, leading to high data transmission latency, particularly affecting small data packet transmissions and limiting the performance of TCP connections.
Innovation Solution
Implementing reduced transmission time intervals (TTIs) of less than 1 millisecond, allowing for faster TCP acknowledgement rates and reducing air interface latency, thereby improving data throughput and enabling ultra-low latency services by processing control and data information within short TTI resource blocks on the physical uplink and downlink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If reduced transmission time intervals (TTIs) of less than 1 millisecond are implemented, then data transmission latency is significantly reduced and throughput is improved, but device complexity and protocol processing requirements increase
Solution Approach 1:
The patent segments the transmission time interval into shorter durations (less than 1 millisecond), dividing the traditional TTI into multiple smaller time slots. This segmentation enables faster transmission cycles and reduces overall latency by allowing more frequent transmission opportunities and quicker acknowledgment cycles.
Solution Approach 2:
The patent changes the temporal parameter of the transmission time interval from the traditional 1 millisecond duration to shorter intervals. This parameter modification directly reduces the time required for transmission cycles, thereby decreasing latency and improving throughput while maintaining the same communication framework.
2Speed
If shorter transmission time intervals are used to reduce latency, then TCP acknowledgement rates increase, but the impact of TCP slow-start congestion control becomes more significant
Solution Approach 1:
The patent implements enhanced feedback mechanisms that work in conjunction with the shorter TTI intervals. By combining frequent transmissions with improved acknowledgment and congestion control feedback, the system optimizes the TCP slow-start phase to achieve higher throughput despite the increased acknowledgment rate requirement.
3Loss of time
If reduced TTI resource blocks are allocated for control and data information, then air interface latency is reduced, but scalability and deployment flexibility are constrained
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms that adapt to different deployment scenarios and traffic conditions. The system can dynamically adjust the allocation of reduced TTI resource blocks based on network conditions, traffic type, and service requirements, thereby maintaining deployment flexibility while achieving low latency performance.
Data Source
AI summary
Technology for a user equipment (UE) to perform reduced transmission time interval (TTI) data transmission within a wireless communication network is disclosed. The UE can process a process, for transmission to an eNodeB, control information within a short transmission time interval (TTI) over a short TTI resource block (RB) set within a short physical uplink control channel (S-PUCCH), wherein the short TTI is shorter in time than a TTI that has a duration of at least one (1) millisecond, and wherein the S-PUCCH is a subset of resources available for a short physical uplink shared channel (S-PUSCH) and the S-PUSCH is a subset of resources available for a legacy PUSCH transmission; and process, for transmission to the eNodeB, data within the short TTI over the short TTI RB set within the S-PUSCH.