Wireless Time Unit Structure for Downlink Scheduling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in the transmission and reception of wireless signals, particularly in managing downlink data, acknowledgement/negative acknowledgement information, and scheduling information, which affects overall communication efficiency.
Innovation Solution
A method and apparatus that involve a user equipment in a wireless communication system receiving downlink data, transmitting acknowledgement/negative acknowledgement information, and receiving scheduling information in specific time units, utilizing a processor and RF module to manage these operations efficiently, with each time unit including control, guard, and data durations, and supporting OFDMA symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink data, acknowledgement information, and scheduling information are transmitted using traditional time division methods, then system compatibility is maintained, but communication efficiency and resource utilization are insufficient
Solution Approach 1:
The time unit is segmented into distinct durations: DL control duration, DL data duration, GP (guard period), and UL control duration. This segmentation allows independent optimization of each segment's function and timing, enabling efficient resource allocation while maintaining clear separation between downlink and uplink operations, thus improving communication efficiency without excessive complexity
Solution Approach 2:
The patent implements dynamic TDD (Time Division Duplexing) where the direction of time resources (downlink or uplink) can be dynamically switched based on traffic conditions. The time unit structure allows flexible configuration of DL and UL durations, enabling the system to adapt to varying communication demands in real-time, thereby significantly improving resource utilization and communication efficiency
2Loss of time
If acknowledgement information is transmitted immediately after downlink data reception, then latency is reduced, but timing coordination and resource allocation become more complex
Solution Approach 1:
The patent allocates UL control duration within the same time unit structure that contains DL data duration. This preliminary structuring allows the UE to prepare and transmit ACK/NACK information in the pre-defined UL control duration immediately following DL data reception, minimizing latency while maintaining systematic timing coordination through the structured time unit design
Solution Approach 2:
The time unit structure ensures continuous useful action by seamlessly transitioning from DL data duration to UL control duration within the same time unit. This continuous structure eliminates idle gaps between downlink and uplink operations, allowing immediate ACK/NACK transmission while maintaining efficient resource utilization through the integrated time unit framework
3Reliability
If guard period is extended to ensure proper switching between downlink and uplink, then signal interference is reduced, but available transmission time is decreased
Solution Approach 1:
The patent dynamically adjusts the duration of the guard period (GP) parameter based on actual system conditions and traffic patterns. By making the GP duration a variable parameter rather than a fixed value, the system can minimize interference protection time when conditions allow, thereby maximizing available transmission duration while maintaining sufficient interference protection when needed, achieving optimal balance through parameter optimization
Data Source
AI summary
The present invention relates to a wireless communication system, and particularly, to a method and an apparatus for same, the method comprising the steps of: receiving DL data from a DL data zone of time unit # n; transmitting ACK/NACK information for the DL data from a UL control zone of time unit # n+1; and receiving DL scheduling information indicating retransmission of the DL data from a DL control zone of time unit # n+2, wherein each of the time units comprises, in time order, the DL control zone, a GP, the UL control zone, and the DL data zone.