Base Station Coexistence via Preliminary Spectrum Measurements
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Solution Overview
Problem
In advanced wireless communication systems, the increasing number of antennas and channel paths leads to excessive channel feedback, reducing efficiency and data rate due to increased overhead, making it challenging to correctly estimate channel conditions between user equipment (UE) and eNode B (eNB).
Innovation Solution
Implementing a method where a base station (BS) performs initial and subsequent signal measurements with neighbor BSs before and after receiving a spectrum access grant, generating measurement reports to optimize coexistence operations, and a network entity processes these reports to allocate spectrum access grants, thereby reducing unnecessary feedback and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of antennas and channel paths is increased to improve wireless communication capability, then the channel estimation accuracy is improved, but the feedback overhead increases and data rate decreases
Solution Approach 1:
The base station performs measurements of neighbor base station signals before receiving the spectrum access grant (Phase I measurements). This preliminary measurement allows the network entity to make informed spectrum allocation decisions before the base station begins transmission, reducing the need for extensive post-allocation feedback while maintaining accurate channel estimation.
Solution Approach 2:
The measurement process is divided into two distinct phases: Phase I measurements performed before spectrum access grant receipt, and Phase II measurements performed after grant receipt. This segmentation allows different measurement objectives to be met at appropriate times, reducing overall feedback requirements while maintaining estimation accuracy.
2Measurement precision
If extensive channel feedback is collected to accurately estimate channel conditions, then the channel estimation accuracy is improved, but the feedback overhead increases and communication efficiency decreases
Solution Approach 1:
Channel measurements are performed in advance before the base station receives the spectrum access grant. This preliminary channel state information enables the network entity to make proactive spectrum allocation decisions, eliminating the need for extensive real-time feedback loops and improving communication efficiency.
Solution Approach 2:
The system implements targeted feedback mechanisms where measurement reports are selectively transmitted based on coexistence requirements. The feedback is optimized to provide only the necessary information for spectrum allocation decisions, reducing overall feedback overhead while maintaining estimation accuracy.
3Reliability
If the base station performs measurements before receiving spectrum access grant, then the coexistence performance is improved, but the measurement and processing time increases
Solution Approach 1:
Phase I measurements of neighbor base station signals are performed during the registration phase, before the base station receives the spectrum access grant. This timing allows coexistence assessments to be completed in advance, enabling proactive spectrum allocation decisions without delaying service deployment.
Solution Approach 2:
The measurement process continues across both phases seamlessly. Phase I measurements provide initial coexistence information, and Phase II measurements refine this information after grant receipt. This continuous measurement approach maintains reliable coexistence performance while minimizing total measurement time through efficient phase transition.
Data Source
AI summary
A method of operating a base station (BS) for a coexistence operation in a wireless communication system is provided. The method comprises performing a first measurement of first signals received from neighbor BSs over channels that are shared with the neighbor BSs before receipt of a spectrum access grant from a network entity; generating a registration request comprising a first measurement report based on the first measurement of the first signals; transmitting, to the network entity, the registration request comprising the first measurement report of the first signals; receiving the spectrum access grant from the network entity; and performing a second measurement of second signals received from the neighbor BSs over the channels that are shared with the neighbor BSs after receiving the spectrum access grant from the network entity.