Wireless Control Apparatus Managing Spatial Multiplexing Interference
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Solution Overview
Problem
In wireless networks performing spatial multiplexing, existing techniques fail to effectively manage interference between communication links, leading to decreased frequency utilization efficiency due to differences in communication period lengths and signal quality between node pairs.
Innovation Solution
A control apparatus that obtains and determines the radio quality of signals in each communication period, extending the communication period length of the signal with a smaller period to ensure it meets the required quality levels, thereby allowing parallel transmission without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial multiplexing is performed with different communication period lengths, then frequency utilization efficiency is improved, but interference between communication links increases
Solution Approach 1:
The control apparatus preliminarily determines radio qualities and extends communication period lengths before actual parallel transmission occurs. By obtaining radio qualities for both signals and extending the shorter period to match the longer one, the system pre-establishes conditions that prevent interference during spatial multiplexing operation.
Solution Approach 2:
The invention changes the communication period length parameter dynamically. When radio quality determination shows that a signal's period is shorter than another's, the control apparatus extends the shorter period to match the longer one, ensuring both signals have equal period lengths before parallel transmission to prevent interference.
2Reliability
If communication period length is extended to equalize periods, then spatial multiplexing reliability is improved, but time resource utilization decreases
Solution Approach 1:
The control apparatus uses feedback from radio quality measurements to determine whether period extension is necessary. By obtaining radio qualities and comparing them against predetermined levels, the system only extends periods when interference would occur, avoiding unnecessary time extension and optimizing resource utilization.
Solution Approach 2:
The communication period length is changed dynamically based on actual radio quality conditions. The apparatus extends periods only when necessary to prevent interference, rather than uniformly extending all periods, thus minimizing time resource loss while maintaining spatial multiplexing reliability.
3Reliability
If radio quality is strictly enforced for all signals, then communication quality is improved, but frequency utilization efficiency decreases
Solution Approach 1:
The control apparatus performs preliminary radio quality determination before allowing spatial multiplexing. By obtaining and evaluating radio qualities in advance, the system identifies which signals need period extension to meet quality requirements, enabling strict quality enforcement without unnecessarily reducing frequency utilization efficiency.
Solution Approach 2:
The communication period length parameter is adjusted based on radio quality assessment. When a signal's radio quality would be insufficient for strict enforcement, the apparatus extends its period to meet the required quality level, allowing strict quality control while maintaining efficient frequency utilization through selective rather than universal period extension.
Data Source
AI summary
A control apparatus that controls the communication period length of a signal transmitted by radio obtains the first radio quality regarding the first signal and the second radio quality regarding the second signal when spatially separating and transmitting the first signal and the second signal in parallel. The apparatus determines whether the first radio quality satisfies the first level for transmitting the first signal in the first communication period length and whether the second radio quality satisfies the second level for transmitting the second signal in the second communication period length. In a case where the first radio quality does not satisfy the first level or the second radio quality does not satisfy the second level, the apparatus extends the communication period length of a signal having a smaller communication period length.