D2D Resource Allocation for Fluctuating Data Sizes
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Solution Overview
Problem
Conventional LTE systems face challenges in resource allocation for periodic D2D traffic where data sizes fluctuate, as existing methods assume constant data sizes, making it difficult to apply semi-static resource allocation effectively in V2X and D2D communications.
Innovation Solution
A user apparatus and base station are equipped with resource allocation units that transmit resource reservation information for D2D control and data, allowing for dynamic allocation and reservation of resources at predetermined timings, enabling flexible adaptation to fluctuating data sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If semi-static resource allocation is used for periodic D2D traffic, then resource allocation overhead is reduced, but it cannot adapt to fluctuating data sizes
Solution Approach 1:
The patent applies preliminary action by having the transmitting terminal pre-notify the receiving terminal of future resource locations through resource reservation information. This allows the receiving terminal to prepare for upcoming transmissions in advance, enabling efficient resource allocation for periodic traffic with fluctuating data sizes without requiring continuous signaling overhead.
2Adaptability or versatility
If resource allocation is dynamically adjusted for each transmission, then adaptability to data size fluctuation is improved, but resource allocation overhead increases
Solution Approach 1:
The patent applies periodic action by establishing a periodic resource allocation pattern where resources are allocated at regular intervals for D2D transmissions. The transmitting terminal sends resource reservation information periodically, allowing the system to adapt to data size fluctuations while maintaining predictable, low-overhead resource management through periodic rather than continuous adjustment.
3Productivity
If resource reservation information is transmitted for future transmissions, then resource allocation efficiency is improved, but transmission complexity increases
Solution Approach 1:
The patent applies segmentation by dividing resource allocation into separate components: resource reservation information for future transmissions and actual data transmissions. This segmentation allows the system to efficiently reserve resources in advance without requiring the full transmission complexity to be resolved immediately, improving resource allocation efficiency while managing complexity through modular information structure.
Data Source
AI summary
A user apparatus according to an embodiment is provided in a wireless communication system in which D2D communications are supported. The user apparatus includes a resource allocation unit configured to allocate a resource for D2D control information to be transmitted at a transmission timing subsequent to a predetermined transmission timing; and a transmission unit configured to transmit resource reservation information including information indicating the resource for D2D control information.