Base Station D2D Capability Exchange for Dual Connectivity
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Solution Overview
Problem
Current cellular networks face challenges in utilizing dual connectivity and device-to-device (D2D) technology effectively, especially in densely deployed small cells, leading to limitations in high data rate and proximity services due to frequent handovers and signal attenuation at high-frequency points.
Innovation Solution
A communication method where a first base station receives D2D capability information from a second base station through an X2 interface, determining whether to provide dual-connectivity services based on this information, enabling D2D discovery and communication while maintaining dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency points (such as 3.5 GHz) are used to increase user throughput and enhance mobility, then user throughput and mobility are improved, but signal attenuation becomes severe resulting in small coverage areas and frequent handovers
Solution Approach 1:
The patent segments the network into macro base stations and small base stations with different frequency assignments. Macro base stations use low-frequency signals for wide coverage and stable connection, while small base stations use high-frequency signals for high throughput in specific areas. This segmentation allows the system to simultaneously achieve high speed and reliability by assigning different frequency bands to different network layers.
2Productivity
If new cells are deployed with high-frequency points to increase user throughput, then user throughput is improved, but coverage area becomes small causing frequent handovers and signaling impact on core network
Solution Approach 1:
The patent applies local quality by deploying small base stations with high-frequency points only in specific areas where high throughput is needed, rather than universally. This allows high productivity in localized hotspots while macro base stations maintain stable connections in broader areas, reducing overall handover frequency and signaling overhead.
3Productivity
If D2D communication is implemented in densely deployed small cells, then data rate and proximity service are improved, but there is no reasonable method to make full use of dual connectivity advantages ensuring D2D discovery/communication service under dual connectivity
Solution Approach 1:
The patent introduces the X2 interface as an intermediary between base stations to enable coordination of D2D communication under dual connectivity. Through this intermediary, base stations can exchange capability information and coordinate resources, allowing D2D discovery and communication services to function properly in dual connectivity scenarios without excessive system complexity.
Data Source
AI summary
Provided is a communication method, including: receiving, by a first station, a first communication message from a second base station through an X2 interface, where the first communication message carries first device-to-device (D2D) capability information for representing a D2D capability of the second base station; and determining, by the first base station, whether to add the second base station to provide a dual-connectivity service to user equipment based on the first D2D capability information. A base station is also provided.