Relay Station Antenna Segmentation for Full Duplex MIMO
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Solution Overview
Problem
The current multi-hop TDD mobile communication system operates in a half-duplex mode, limiting data rate and failing to utilize the MIMO scheme for efficient high-speed data transmission due to interference and information loss from factors like multi-path interference and fading.
Innovation Solution
Implementing a full duplex mode with multiple antennas at relay stations, allowing simultaneous signal transmission and reception, and using an active antenna set decision algorithm to select optimal antennas for communication with mobile stations, thereby enabling MIMO diversity gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If half-duplex mode is used in multi-hop TDD mobile communication system, then interference between transmission and reception is avoided, but data rate is limited and cannot achieve high-speed data transmission
Solution Approach 1:
The relay station divides its antenna resources into separate first antenna sets for communication with the base station and second antenna sets for communication with mobile stations. This segmentation allows independent optimization of transmission and reception paths, enabling full-duplex operation without interference between uplink and downlink signals.
Solution Approach 2:
The patent transitions from half-duplex time-division operation to full-duplex spatial-division operation by utilizing multiple antenna dimensions. The relay station simultaneously transmits and receives signals on different antenna sets, effectively adding a spatial dimension to resolve the interference problem while achieving high data rates.
2Productivity
If multiple antennas are used at relay stations for full duplex mode, then data rate and communication capacity are enhanced, but device complexity increases
Solution Approach 1:
The relay station's antenna system is segmented into distinct first antenna sets connected to a transmit chain for base station communication and second antenna sets connected to a receive chain for mobile station communication. This segmentation simplifies the overall system architecture by separating transmission and reception functions into independent chains, reducing the complexity of full-duplex operation.
3Productivity
If MIMO scheme is implemented, then efficient high-speed data transmission is achieved, but information loss from multi-path interference and fading increases
Solution Approach 1:
The patent employs adaptive modulation and coding schemes that dynamically adjust transmission parameters based on channel conditions. By changing modulation order and coding rate according to real-time channel quality feedback, the system optimizes data transmission efficiency while maintaining acceptable signal quality despite multi-path interference and fading effects.
Data Source
AI summary
In a mobile communication system, a relay station (RS) is used for signal exchange with a base station (BS), and includes a first antenna set including at least one antenna, used for signal exchange with the BS, and a second antenna set including at least one antenna, used for signal exchange with a mobile station (MS). The RS selects at least one antenna from the second antenna set for each of the at least one MS, and exchanges a signal with the MS using the selected at least one antenna.