D2D Terminal Coverage Status Signaling for Interference Control
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Solution Overview
Problem
Existing device-to-device (D2D) communication systems face challenges in maintaining continuous operation and signaling when terminals move beyond network coverage, leading to interference and loss of D2D operations between groups using different resource pools.
Innovation Solution
A method where a terminal determines its network coverage status and transmits this information to other terminals, allowing them to switch between D2D configurations within and outside network coverage, ensuring seamless D2D operations by coordinating resource information and preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals use different D2D resource pools inside and outside network coverage, then D2D operation can be maintained in both scenarios, but interference occurs between terminals in different groups using different resource pools
Solution Approach 1:
The patent applies local quality by configuring different D2D resource pools for different locations (inside vs. outside network coverage). Terminals receive location-specific resource configurations from the base station, allowing each terminal to use appropriate resources based on its coverage status, thereby maintaining reliable D2D operations while managing interference through spatial differentiation of resource allocation.
Solution Approach 2:
The patent implements dynamics by enabling terminals to dynamically switch between different D2D resource pools based on their network coverage status. When a terminal moves between covered and uncovered areas, it can transition between corresponding resource pools, ensuring continuous D2D operation adaptability while the system dynamically adjusts resource usage patterns.
2Adaptability or versatility
If a terminal moves beyond network coverage, then direct communication can continue, but loss of D2D operation occurs without proper signaling mechanisms
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple D2D resource pools and their corresponding parameters before terminals move to different coverage areas. The base station provides terminals with advance information about available resource pools for both inside and outside coverage scenarios, enabling terminals to seamlessly transition without operational loss when moving beyond network coverage.
Solution Approach 2:
The patent implements feedback mechanisms where terminals report their coverage status and resource usage to the base station, and the base station provides signaling information about appropriate resource pool configurations. This feedback loop ensures that terminals maintain reliable D2D operations beyond coverage by receiving updated configuration information based on their current status.
3Device complexity
If D2D configuration is provided only within network coverage, then resource management is simplified, but terminals cannot perform D2D operation when moved beyond coverage
Solution Approach 1:
The patent applies segmentation by dividing D2D resource pools into distinct groups corresponding to different coverage scenarios (inside coverage vs. outside coverage). Each segment is independently configured and managed, allowing the system to maintain simplified resource management within each segment while providing comprehensive coverage across both segments through the use of multiple segmented resource pools.
Data Source
AI summary
Provided are a device-to-device (D2D) operation method performed by a terminal in a wireless communication system and a terminal using the method. The method comprises: determining whether the terminal is located within network coverage; and transmitting information notifying a result of the determination to another terminal. Using this information, said another terminal can know whether the terminal is located within the network coverage and perform the D2D operation on the basis thereof.