Virtual STBC Relay Cooperation for Single-Antenna Reliability
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Solution Overview
Problem
Many existing wireless network hardware, including base stations and relay stations, lack multiple transmission antennas, limiting the application of MIMO techniques such as Space-Time Block Coding (STBC) that require multiple antennas for enhanced data reliability.
Innovation Solution
Configuring multiple spatially separated transmission stations to cooperate as virtual STBCs, allowing them to transmit data correlated in an Alamouti fashion, even if individual stations have only a single antenna, thereby mimicking a multiple-antenna transmission to increase communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO techniques with multiple antennas are used, then data transmission reliability is improved, but hardware complexity and cost increase due to requiring multiple transmission antennas at each station
Solution Approach 1:
The patent segments the multiple-antenna transmission function across multiple spatially separated relay stations, where each relay station with a single antenna transmits a portion of the STBC-correlated data. This divides the complex multi-antenna system into simpler single-antenna nodes that cooperate to achieve the same reliability benefits
Solution Approach 2:
The patent introduces virtual STBC as an intermediary technique that enables single-antenna relay stations to cooperate and emulate multi-antenna transmission. The virtual STBC framework allows these simple relay stations to achieve MIMO-like reliability without requiring physical multiple antennas at each node
2Reliability
If virtual STBC cooperation among relay stations is implemented, then MIMO performance is achieved with existing single-antenna hardware, but coordination complexity and signaling overhead increase
Solution Approach 1:
The patent enables relay stations to self-organize into virtual STBC groups where stations automatically coordinate their transmissions based on pre-configured STBC codes. Each relay station independently applies the appropriate correlation pattern to its data stream, reducing the need for complex real-time coordination while maintaining MIMO performance
Data Source
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AI summary
A method for transmitting data in a wireless network includes wirelessly transmitting data from a base station to a plurality of spatially separated relay stations. The data is correlated according to space-time block coding (STBC) for transmission over multiple antennas. The STBC correlated data are wirelessly transmitted from the plurality of spatially separated relay stations to a mobile station. The plurality of spatially separated relay stations cooperate to provide a single multiple antenna transmission