LTE Radio Frame Configuration for Flexible TTI Allocation
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Solution Overview
Problem
In LTE communication systems, the fixed 1 millisecond transmission time interval (TTI) limits data transmission efficiency, particularly when multiple physical resources are consecutively allocated, leading to deteriorated overall system transmission efficiency.
Innovation Solution
The introduction of a wireless communication system with a radio frame configuration of 10 milliseconds, comprising two half-frames, each with 5 sub-frames, allows for flexible allocation of downlink and uplink sub-frames, including a special sub-frame for pilot transmission, enhancing data transmission efficiency by optimizing the timing and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed 1 millisecond transmission time interval (TTI) is used in LTE communication systems, then the system maintains simplicity and compatibility with existing standards, but data transmission efficiency deteriorates when multiple physical resources are consecutively allocated
Solution Approach 1:
The patent implements dynamic TTI configuration by allowing the base station to flexibly adjust TTI length based on channel conditions and traffic requirements. The system transitions from a fixed 1ms TTI to variable TTI lengths, enabling adaptive optimization of transmission efficiency while maintaining system compatibility through standardized interfaces.
Solution Approach 2:
The invention changes the TTI parameter from a fixed value to a variable parameter that can be dynamically configured. By modifying the TTI length parameter according to channel quality and service requirements, the system achieves improved transmission efficiency without fundamentally altering the LTE architecture.
2Speed
If multiple physical resources are consecutively allocated to reduce transmission time, then data transmission speed improves, but overall system transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the base station adjusts both the number of consecutively allocated physical resources and the TTI length based on real-time channel conditions and service requirements. This dynamic approach ensures that transmission speed is optimized without sacrificing overall system efficiency, as resources are allocated adaptively rather than continuously.
Solution Approach 2:
The system employs periodic resource allocation patterns where transmission resources are allocated in controlled intervals rather than continuously. This periodic action allows the system to maintain high transmission speeds when needed while providing opportunities for resource reconfiguration and optimization, thereby preserving overall system efficiency.
3Adaptability or versatility
If a fixed TTI configuration is used, then the system maintains stability and ease of operation, but adaptability to different transmission scenarios deteriorates
Solution Approach 1:
The patent introduces dynamic TTI configuration that adapts to different transmission scenarios while maintaining operational simplicity through automated base station control. The system dynamically adjusts TTI parameters based on channel conditions, service types, and traffic patterns, providing high adaptability without requiring complex manual configuration.
Solution Approach 2:
The base station automatically configures TTI parameters based on measured channel conditions and service requirements, enabling the system to adapt to different scenarios without external intervention. This self-service mechanism maintains ease of operation while achieving high adaptability through intelligent, automated parameter adjustment.
Data Source
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AI summary
A communication device for communicating with a base station device, comprising a higher layer processing unit configured to set bitmap information indicating a resource to which a channel can be mapped on a predetermined time duration and resource block information of a frequency direction in which the channel can be mapped through signaling of a higher layer from the base station device and a control unit configured to set a first mode in which the predetermined time duration is received as a unit or a second mode in which a symbol is received as a unit through signaling of a physical layer from the base station device. The channel is mapped to any of one or more channel candidates within a resource decided on a basis of at least the bitmap information and the resource block information, and the bitmap information indicates whether or not the channel candidates are included in a resource of a time duration corresponding to each bit