D2D Relay Selection in LTE Networks
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Solution Overview
Problem
Current communication systems face challenges in efficiently establishing device-to-device (D2D) relay links in LTE networks, particularly in selecting suitable relay nodes that do not impact existing access links and maximize end-to-end rate without degrading preexisting connections.
Innovation Solution
The proposed solution involves a method where idle user equipment (UE) can act as relays for nearby active UEs, determining the impact of preexisting access links and UL links on relay candidates, and selecting a relay that improves end-to-end rate without affecting existing access links, using broadcast information to assess interference and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If idle UEs are selected as relay nodes to improve end-to-end rate, then communication efficiency is improved, but interference to preexisting access links may occur
Solution Approach 1:
The system performs preliminary evaluation of relay candidates by assessing their impact on preexisting access links before selecting them as relays. The UE determines whether candidate relays can be selected by evaluating interference effects in advance, ensuring that relay selection does not degrade existing connections while maximizing end-to-end rate.
2Measurement precision
If more relay candidates are evaluated to find the optimal relay, then relay selection accuracy is improved, but system complexity increases
Solution Approach 1:
The relay selection process is segmented into distinct evaluation steps: identifying relay candidates, assessing their impact on preexisting links, and making selection decisions. The UE evaluates candidates systematically by breaking down the complex selection task into manageable assessment components, reducing overall system complexity while maintaining selection accuracy.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided in connection with D2D relay link selection in a LTE based access network. In one example, a communications device is equipped to determine that the communications device (e.g., a UE) is able to establish a relay link with a candidate UE based on at least one of information associated with any preexisting access links with the candidate UE, information associated with any preexisting accessing links within a threshold vicinity of the UE or the candidate UE, or any other UE UL interference, determine that the candidate UE is able to support the relay link based on information associated with preexisting access links for the candidate UE, and perform a link establishment process for the relay link with the candidate UE based on the determinations.