Device-to-Device Beacon Design for Signaling Overhead Reduction
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Solution Overview
Problem
Current device-to-device (D2D) communication systems face inefficiencies in resource allocation and interference management due to high signaling overhead and complexity, particularly when a large number of devices are discovered, leading to latency in link establishment and unnecessary reporting of all UEs, including inactive ones.
Innovation Solution
Implementing a device-to-device beacon design that differentiates between D2D-active and D2D-passive UEs during the discovery process, allowing only active UEs to be reported and using discovery beacons to include information about communication states and resource usage, thereby reducing the number of devices to check and simplifying resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all discovered UEs are reported to the network for resource allocation, then complete information about discovered devices is obtained, but signaling overhead and system complexity increase significantly
Solution Approach 1:
The patent extracts only the essential information needed for resource allocation - specifically, whether a discovered UE is in D2D-active state or not. This selective extraction of information (active state indication) rather than reporting all UE details reduces signaling overhead while maintaining the necessary information for effective resource allocation decisions.
Solution Approach 2:
The patent segments the discovered UEs into two categories: D2D-active UEs and non-active UEs. This segmentation allows the system to focus resource allocation efforts only on active devices, eliminating the need to report and process information about inactive UEs, thereby reducing signaling overhead and complexity.
2Reliability
If all discovered UEs are checked for resource allocation, then interference between D2D pairs is avoided, but the time and complexity of resource allocation increases
Solution Approach 1:
The patent extracts only the critical attribute needed for interference avoidance - the D2D-active state indication from discovered UEs. By checking only this specific information rather than examining all UE parameters, the system maintains reliable interference avoidance while significantly reducing the time and computational complexity of resource allocation.
Solution Approach 2:
The patent applies partial action by checking only the necessary subset of UE information (active state) rather than performing exhaustive checks on all discovered UEs. This partial checking approach is sufficient to avoid interference with active D2D pairs while reducing allocation time and complexity.
3Device complexity
If D2D resource allocation is performed autonomously without network control, then signaling overhead is reduced, but interference management between neighboring D2D pairs becomes more difficult
Solution Approach 1:
The patent enables autonomous D2D resource allocation where UEs independently perform resource selection based on local information about active D2D pairs. This self-service approach reduces signaling overhead by eliminating extensive network control messages, while the inclusion of active state information in discovery beacons provides sufficient data for UEs to make informed resource allocation decisions and avoid interference autonomously.
Data Source
AI summary
Device discovery may be important in a variety of communication systems including, for example, wireless communication systems. Thus, certain embodiments may provide a device to device beacon design that may provide for efficient interference management and resource allocation. For example, a method may include preparing a proximity communication request including information about a device to device communication state of a discovered user equipment or resource usage of the discovered user equipment. The method may also include transmitting the proximity communication request to a base station.