D2D Receiver Spare Chain Switching for Discovery Signal Reception
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving Device-to-Device (D2D) signals, particularly in managing radio resource allocation and synchronization signals, which affects the performance and efficiency of D2D communication.
Innovation Solution
The method involves configuring a D2D user equipment with multiple radio frequency chains to receive a pool configuration indicating resources for D2D discovery and switching a D2D receiver spare chain On-Off, with the interruption timing determined by a window size associated with the resource for performing D2D discovery, optimizing the switching of the D2D receiver spare chain before and after specific resource sections or synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a D2D receiver spare chain is continuously kept On to ensure uninterrupted D2D discovery signal reception, then reception reliability is improved, but energy consumption increases
Solution Approach 1:
The D2D receiver spare chain is switched On and Off periodically based on pre-configured window sizes associated with D2D discovery resources. The receiver activates only during specific time windows when discovery signals are expected to occur, rather than remaining continuously active, thereby reducing energy consumption while maintaining reliable signal reception during critical periods.
Solution Approach 2:
The system pre-configures window size parameters that define when the D2D receiver spare chain should be activated. This preliminary configuration allows the receiver to anticipate discovery signal occurrences and activate in advance, ensuring reliable reception without requiring continuous monitoring, thus optimizing the trade-off between reliability and energy consumption.
2Productivity
If the D2D receiver spare chain switching timing is not optimized, then implementation simplicity is maintained, but D2D discovery performance deteriorates due to missed signals
Solution Approach 1:
The system utilizes configurable window size parameters that define the activation timing and duration of the D2D receiver spare chain. By adjusting these parameters, the system optimizes the balance between discovery performance and operational complexity, allowing the receiver to activate at precise moments when discovery signals are likely to occur without requiring complex real-time decision-making logic.
3Reliability
If multiple radio frequency chains are allocated for D2D reception to improve signal reception capability, then reception quality is improved, but device complexity and cost increase
Solution Approach 1:
The system dynamically switches the D2D receiver spare chain between On and Off states based on configured timing parameters rather than maintaining a fixed configuration. This dynamic approach allows the system to utilize multiple RF chains only when necessary for discovery signal reception, improving reception quality during critical periods while reducing overall device complexity and resource requirements during non-critical periods.
Data Source
AI summary
The method for a D2D terminal for receiving a D2D discovery signal including a plurality of radio frequency chains in a wireless communication system. Specifically, the method includes the steps of: configuring discontinuous reception (DRX) cycle based on a higher layer signal, receiving physical downlink control channel (PDCCH) in a duration based on the configured DRX cycle from a base station using a first carrier, wherein a timer for the duration is counted based on consecutive PDCCH subframes, and the PDCCH is monitored in the consecutive PDCCH subframes, communicating with the base station using the first carrier based on the configured DRX cycle, and communicating with a second D2D UE using a second carrier, wherein the first UE includes a D2D dedicated radio frequency chain.