Base Station D2D Discovery Resource Allocation
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Solution Overview
Problem
Current device-to-device (D2D) communication technologies are limited by the need for user equipments to belong to the same mobile communication provider and use the same carrier frequency band, preventing cross-provider and cross-frequency band communication.
Innovation Solution
A communication system where a base station groups user equipments by location and allocates a discovery resource pool within a predefined carrier frequency band, allowing user equipments to transmit discovery messages and enabling D2D communication across different mobile communication providers and frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipments use different carrier frequency bands for communication with their respective base stations, then each mobile communication provider can operate independently without interference, but user equipments are unable to conduct D2D communication across different frequency bands and mobile communication providers
Solution Approach 1:
The base station acts as an intermediary that collects D2D communication requests from user equipments on different frequency bands, groups them by location, and allocates a common discovery resource pool on a predefined frequency band. This mediator enables cross-frequency-band D2D communication without direct interference between different mobile communication providers' frequency bands.
Solution Approach 2:
The patent introduces a new dimension of communication by allocating discovery resource pools on a predefined frequency band that is separate from the individual carrier frequency bands used by different mobile communication providers. This dimensional separation allows D2D discovery messages to be transmitted across frequency band boundaries while maintaining the independence of original communication channels.
2Device complexity
If user equipments are restricted to D2D communication within the same mobile communication provider and frequency band, then network management and interference avoidance are simplified, but the service coverage and user accessibility are limited
Solution Approach 1:
The patent segments the D2D communication process into distinct phases: request submission to base station, base station grouping by location, resource pool allocation on predefined frequency band, and discovery message transmission. This segmentation allows complex cross-provider D2D communication to be managed through standardized, manageable steps while maintaining simplicity in network control.
3Adaptability or versatility
If a common discovery resource pool is allocated on a predefined frequency band for user equipments from different mobile communication providers, then cross-provider D2D communication is enabled, but frequency band coordination and resource allocation complexity increases
Solution Approach 1:
The base station is designed with multi-functionality to handle both traditional carrier frequency band communication and the additional task of managing the predefined frequency band discovery resource pool. This universal base station can simultaneously serve multiple mobile communication providers while coordinating cross-provider D2D discovery, reducing the need for separate specialized infrastructure.
Data Source
AI summary
Embodiments of a communication system, a base station (BS), a user equipment (UE), and a discovery method for device-to-device (D2D) communication are provided. The communication system includes a base station and multiple UEs. Each of the UEs uses one of multiple carrier frequency bands for communication. The BS obtains D2D communication requests of the UEs by the carrier frequency bands, and groups the UEs into multiple groups according to locations of the UEs. The BS allocates a discovery resource pool of a predefined carrier frequency band to the UEs in the same group and enables each of the UEs to transmit a discovery message corresponding to each of the UEs' own in the discovery resource pool.