TDD Multi-Component Carrier Response Control Allocation
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Solution Overview
Problem
Current Time Division Duplex (TDD) systems using multiple component carriers face inefficiencies in transmitting response control information due to rigid uplink and downlink subframe configurations, leading to suboptimal network performance, especially in asymmetric scenarios where the number of uplink and downlink carriers differs.
Innovation Solution
The method involves configuring different TDD schemes for multiple component carriers, allowing uplink subframes to be positioned variably across cells, enabling response control information to be transmitted through uplink subframes of secondary cells rather than just primary cells, thereby optimizing data traffic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single TDD configuration is used for all component carriers, then system simplicity is maintained, but response control information transmission efficiency deteriorates in asymmetric scenarios
Solution Approach 1:
The patent divides the TDD configuration into separate configurations for different component carriers. Each component carrier can have its own TDD configuration (first TDD configuration or second TDD configuration), allowing independent optimization of uplink and downlink subframe structures for each carrier based on traffic requirements.
Solution Approach 2:
The patent enables dynamic selection of TDD configurations for different component carriers. The system can adaptively choose which TDD configuration to apply to each component carrier based on current traffic conditions, allowing flexible adjustment of uplink and downlink resource allocation without requiring complex reconfiguration of the entire system.
2Reliability
If response control information is transmitted only through primary cell uplink subframes, then system complexity is reduced, but transmission reliability and flexibility worsen when primary cell uplink subframes are unavailable
Solution Approach 1:
The patent makes secondary cells capable of transmitting response control information, which traditionally was only handled by primary cells. This multi-functional approach allows any component carrier with available uplink subframes to serve as a fallback for response control information transmission, ensuring reliability when the primary cell's uplink subframes are unavailable or unsuitable.
Solution Approach 2:
The patent pre-configures multiple component carriers with appropriate TDD configurations that ensure uplink subframe availability. By anticipating potential unavailability of primary cell uplink subframes, the system prepares alternative transmission paths in advance, allowing seamless switching without requiring complex real-time decision-making or reconfiguration.
3Productivity
If uplink and downlink subframes are rigidly configured, then system complexity is minimized, but network performance deteriorates in asymmetric traffic scenarios
Solution Approach 1:
The patent applies different TDD configurations to different component carriers based on their specific traffic requirements. Each component carrier can have customized uplink and downlink subframe allocations tailored to local traffic patterns, allowing optimal performance for each carrier while maintaining overall system manageability through standardized configuration sets.
Data Source
AI summary
The present invention relates to a method and apparatus for controlling data traffic in a time-division duplex (TDD) system that uses multi-component carriers. The method for controlling data traffic in a TDD system that uses multi-component carriers according to one embodiment of the present invention comprises the steps of: a base station transmitting, to a user equipment, a wireless signal including data through one or more component carriers among a component carrier group including a first element carrier which is a primary cell (PCell) and a second element carrier (SCell) which is a secondary cell, wherein the Pcell and the Scell consist of uplink and downlink subframes in a time division duplex system; and the base station receiving, from the user terminal, a wireless signal including response control information for the data through the second component carrier.