Mobile Terminal RF Chain Switching for D2D Communication
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Solution Overview
Problem
The existing mobile communication systems supporting Device to Device (D2D) communication require multiple Radio Frequency (RF) chains for both mobile and D2D communication, increasing implementation complexity and cost.
Innovation Solution
A mobile terminal with a reduced number of RF chains, utilizing a switching unit with switches to establish transmission and reception paths by combining parts of the first and second RF chains for D2D communication, allowing for efficient allocation of frequency bands between mobile and D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RF chains are used for both mobile and D2D communication, then communication capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling a single RF chain to perform both mobile communication and D2D communication functions. The base station configures the UE to use the same RF chain for different communication types by adjusting frequency band allocation and switching parameters, thereby eliminating the need for separate RF chains for each communication mode.
Solution Approach 2:
The patent implements dynamics through configurable frequency band switching and RF chain allocation. The base station dynamically adjusts which frequency bands are used for mobile communication versus D2D communication based on traffic conditions, allowing the system to adapt between different communication modes without requiring fixed hardware configurations for each mode.
2Adaptability or versatility
If multiple RF chains are used for both mobile and D2D communication, then communication capability is improved, but implementation cost increases
Solution Approach 1:
The patent reduces implementation cost by designing a universal RF chain that can serve dual purposes for both mobile and D2D communication. This approach eliminates the need for manufacturers to produce expensive devices with separate dedicated RF chains for each communication type, thereby reducing production costs while maintaining full communication capability.
Solution Approach 2:
The patent combines the functions of mobile communication and D2D communication into a single RF chain infrastructure. By merging these previously separate functions into one shared resource, the system reduces the total number of components that need to be manufactured and assembled, directly lowering implementation costs.
3Adaptability or versatility
If frequency bands are allocated for D2D communication, then D2D communication is enabled, but mobile communication performance may be affected
Solution Approach 1:
The patent employs dynamic frequency band allocation where the base station continuously monitors communication conditions and adjusts the allocation of frequency bands between mobile and D2D communication in real-time. When mobile communication performance is prioritized, more frequency bands are allocated to mobile communication; when D2D communication needs are higher, appropriate bands are allocated to D2D while maintaining mobile communication quality.
Solution Approach 2:
The system implements feedback mechanisms where the base station receives quality metrics from both mobile and D2D communication channels and uses this information to make informed decisions about frequency band allocation. This feedback loop ensures that mobile communication performance is maintained at acceptable levels while enabling D2D communication functionality.
Data Source
AI summary
A mobile terminal in a mobile communication system supporting device to device (D2D) communication, and a method for operating the mobile terminal are provided. The terminal includes a first radio frequency (RF) chain configured to transmit a mobile communication signal and a second RF chain configured to receive a mobile communication signal, for mobile communication with a base station, a switching unit including a plurality of switches configured to establish transmission and reception paths in the first and second RF chains, and a controller configured to control switching of the switching unit to establish transmission and reception paths of a D2D communication signal for D2D communication by combining a part of the first RF chain with a part of the second RF chain. The combination of the parts of the first and second RF chains is different according to a D2D communication frequency band.