Two-Hop Link Establishment in D2D Networks
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Solution Overview
Problem
Current D2D communication networks face limitations in establishing and managing two-hop links, which restricts their communication range and efficiency, especially in scenarios where single-hop radio communication technologies are insufficient for data transmission due to signal interference and limited resource allocation.
Innovation Solution
A method and apparatus for establishing two-hop links in D2D communication networks by identifying neighboring terminals, determining link types, selecting relay terminals, allocating Multi-Hop Connection Identifiers (MCIDs), and using Orthogonal Frequency Division Multiplexing (OFDM) signals for data transmission, allowing for efficient data relay and reception while considering signal interference and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If single-hop radio communication is used, then device complexity is reduced, but communication range is limited
Solution Approach 1:
The patent introduces relay terminals as intermediary nodes to extend communication range. When direct single-hop communication between transmission and recipient terminals is not feasible, relay terminals mediate the communication by establishing two-hop links, thereby extending the effective communication range without requiring complex multi-hop routing protocols at each node.
Solution Approach 2:
The patent segments the communication path into multiple hops with defined roles (transmission terminal, relay terminal, recipient terminal). Each segment operates with simplified protocols appropriate to its function, reducing overall system complexity while enabling extended range communication through coordinated multi-segment operation.
2Extent of automation
If distributed link scheduling is implemented, then network autonomy is improved, but signal interference increases
Solution Approach 1:
The patent implements feedback mechanisms where terminals report channel conditions, link quality, and interference levels to the network. This feedback enables autonomous distributed scheduling decisions while coordinating transmissions to minimize interference, as terminals can adjust their transmission parameters based on received feedback from neighboring nodes.
Solution Approach 2:
The patent employs dynamic link scheduling where transmission parameters, resource allocation, and relay selections are continuously adjusted based on current network conditions. This dynamic adaptation allows the autonomous network to optimize performance and reduce interference while maintaining decentralized control.
3Reliability
If relay terminals are introduced, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent enables relay terminals to autonomously select appropriate relay candidates based on predefined criteria such as signal strength, available resources, and current load. This self-service capability reduces the need for complex centralized relay management while improving communication reliability through automatic relay selection and failover mechanisms.
Data Source
AI summary
A two-hop link transmission method and apparatus are provided. The method includes establishing a two-hop link and scheduling transmission on the two-hop link in a Device-To-Device (D2D) communication network. The two-hop link transmission method includes identifying neighbor terminals available for communication with the transmission terminal, selecting one of the neighboring terminals as a recipient terminal, determining a type of a link to be established with the selected neighboring terminal between a single-hop link and two-hop link types, selecting, when the two-hop link type is determined, a relay terminal among the neighboring terminals, establishing the two-hop link with the recipient terminal via the relay terminal, allocating a Multi-Hop Connection Identifier (MCID) for the two-hop link, and transmitting data to the recipient terminal through the two hop link.