Measuring Radio Node Delay Spread Adaptation
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Solution Overview
Problem
High-frequency wireless communication systems face challenges in handling delay spread and timing issues due to large bandwidths, leading to loss of orthogonality and synchronization, particularly in millimeter wave communication systems operating above 52.6 GHz.
Innovation Solution
A method and system for a measuring radio node that transmits and receives signaling based on delay spread information, using processing and radio circuitry to determine and adapt communication parameters such as scheduling, beam forming, and bandwidth configuration, to maintain orthogonality and synchronization even with short time bases and high bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high frequencies and large bandwidths are used for wireless communication, then communication capacity and speed are improved, but delay spread and timing issues worsen leading to loss of orthogonality and synchronization
Solution Approach 1:
The system performs preliminary delay spread measurements using reference signals before actual data transmission. The measuring radio node determines delay spread information in advance and reports it to the network node, which then uses this information to configure appropriate cyclic prefix lengths and timing parameters before communication begins, preventing synchronization issues rather than correcting them later
Solution Approach 2:
The measuring radio node continuously measures delay spread on received reference signals and provides feedback reports to the network node. The network node uses this feedback to dynamically adjust communication parameters including cyclic prefix configuration, scheduling timing, and beam forming parameters, creating a closed-loop system that maintains synchronization despite varying channel conditions
2Productivity
If high frequencies and large bandwidths are used for wireless communication, then communication capacity is improved, but orthogonality is lost due to delay spread
Solution Approach 1:
The system dynamically changes key parameters including cyclic prefix length, subcarrier spacing, and symbol duration based on measured delay spread values. When delay spread is large, the system increases cyclic prefix length and adjusts numerology parameters to maintain orthogonality among subcarriers, while still allowing operation at high frequencies and large bandwidths for high capacity
3Speed
If short symbol time intervals are used for high bandwidth communication, then communication speed is improved, but timing precision requirements increase making synchronization more difficult
Solution Approach 1:
The system replaces traditional timing synchronization methods with delay spread-based timing adjustment. Instead of relying solely on precise mechanical timing alignment, the system uses measured delay spread information to calculate and apply timing offsets that compensate for propagation delays, making the system more robust to timing variations while maintaining high communication speed
Data Source
AI summary
There is disclosed a method of operating a measuring radio node in a wireless communication network, the method includes transmitting signaling based on delay spread information, the delay spread information being based on and/or representing delay spread associated to received reference signaling. There are also disclosed related devices and method.