Uplink Cancellation Signaling for Dynamic TDD Resource Control
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently managing uplink transmission resources, leading to unnecessary energy consumption and interference due to insufficient resource allocation and cancellation mechanisms.
Innovation Solution
A method and apparatus for user equipment to receive configuration information and downlink control signals to indicate time-frequency resources for cancelling uplink transmission, utilizing subcarrier spacing and specific symbols for efficient resource allocation and cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If uplink transmission resources are allocated without cancellation mechanism, then resource allocation is simple, but energy consumption increases and interference occurs due to unnecessary transmissions
Solution Approach 1:
The patent applies preliminary action by introducing a cancellation indication mechanism that proactively identifies and cancels unnecessary uplink transmissions before they occur. The base station sends cancellation indications to user equipment to prevent wasteful transmissions, thereby reducing energy consumption while maintaining a relatively simple resource allocation framework.
Solution Approach 2:
The patent extracts the cancellation function from the traditional resource allocation mechanism. By separating the cancellation indication process from the initial resource allocation, the system can maintain simple allocation procedures while adding a targeted cancellation mechanism to eliminate unnecessary transmissions and reduce energy waste.
2Productivity
If dynamic TDD is used to vary OFDM symbols for uplink and downlink, then spectral efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies dynamics by enabling flexible and dynamic adjustment of slot configurations in dynamic TDD systems. The cancellation indication mechanism works in conjunction with dynamic slot formatting, allowing the system to adaptively vary the number of OFDM symbols for uplink and downlink based on traffic conditions, thereby maximizing spectral efficiency while managing complexity through standardized procedures.
3Length of stationary object
If beamforming and massive MIMO are used in mmWave band, then transmission distance increases, but device complexity and processing requirements increase
Solution Approach 1:
The patent applies preliminary action by canceling unnecessary uplink transmissions before they occur in complex mmWave systems using beamforming and massive MIMO. This prevents wasteful processing and energy consumption in already complex antenna systems, thereby improving overall system efficiency without requiring additional hardware complexity.
4Object-generated harmful factors
If uplink transmission is performed without cancellation, then resource allocation is straightforward, but interference with other users increases
Solution Approach 1:
The patent extracts the interference mitigation function into a separate cancellation indication mechanism. By separating this function from the basic resource allocation process, the system can maintain straightforward allocation procedures while adding a targeted cancellation mechanism to eliminate interfering transmissions, thereby reducing harmful effects without significantly increasing overall system complexity.
Data Source
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AI summary
Disclosed is a method in which a user equipment receives downlink control information in a wireless communication system. The user equipment may receive configuration information for reception of a physical downlink control channel (PDCCH) from a base station, and may receive a PDCCH including downlink control information (DCI) on the basis of the configuration information.