D2D Terminal Gap Configuration for Single Receiver
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Solution Overview
Problem
In wireless communication systems, especially for public safety networks, there is a need for device-to-device (D2D) operation to function effectively even when a UE has only one reception function unit, requiring a method to configure a gap in downlink signal reception to enable D2D communication without disrupting network communication.
Innovation Solution
A method where a terminal receives information about a D2D resource pool and configures a gap in which it does not receive the downlink signal from the serving cell, allowing for D2D operation by using the D2D resource, which can include subframes and their surrounding periods, enabling D2D signal transmission or discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE with one reception function unit performs D2D operation on a different frequency band, then D2D communication is enabled, but downlink signal reception from the network must be stopped during part of the time period
Solution Approach 1:
The patent segments the time period into specific subframes for D2D operation and other subframes for network communication. The UE configures a gap consisting of specific subframes for D2D activities, allowing separation of D2D and network communication in the time domain, thus enabling both functions with a single reception unit.
Solution Approach 2:
The patent implements dynamic gap configuration where the UE can autonomously determine and adjust the gap structure based on D2D requirements. The gap configuration includes flexibility in selecting subframes, allowing the system to adapt to varying D2D traffic patterns while maintaining network communication during non-gap subframes.
2Adaptability or versatility
If a gap is configured for D2D operation, then D2D communication can be performed, but network communication may be interrupted during the gap period
Solution Approach 1:
The patent applies local quality by configuring the gap to affect only specific subframes while leaving other subframes dedicated to network communication. This localized time-domain separation ensures that D2D operation is enabled without broadly impacting network communication efficiency, as network data can be transmitted during non-gap subframes.
Solution Approach 2:
The patent implements periodic gap configuration where D2D operations are scheduled in periodic intervals rather than continuously. This allows network communication to occur during non-gap periods, maintaining overall network productivity while providing regular opportunities for D2D communication.
3Adaptability or versatility
If the UE stops downlink signal reception for D2D operation, then D2D communication is enabled, but control signals from the serving cell are missed
Solution Approach 1:
The patent applies preliminary action by configuring the gap in advance based on D2D resource requirements. The UE determines the gap configuration before D2D operations begin, allowing proper scheduling of both network and D2D activities. This advance planning ensures that control signals are received during non-gap subframes before D2D operations start.
Solution Approach 2:
The patent introduces the gap configuration as an intermediary mechanism that mediates between network communication and D2D operations. The gap acts as a scheduled transition period that allows the UE to switch between network mode and D2D mode, ensuring that control signals are received during network subframes while enabling D2D during gap subframes.
Data Source
AI summary
A method for device-to-device (D2D) operation performed by a terminal in a wireless communication system and a terminal using the method are provided. The method comprises: receiving information related to a D2D resource pool; and performing D2D operation with another terminal from a D2D resource indicated by the information related to the D2D resource pool, wherein the terminal establishes a gap which does not receive a downlink signal transmitted from a serving cell, based on the D2D resource.