Interference Measurement Accuracy in Wireless Networks
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Solution Overview
Problem
Existing wireless communication networks face inaccuracies in signal interference measurements due to intermittent activity of neighboring base stations, which can lead to inaccurate Channel Quality Indicator (CQI) reports, as these measurements are averaged over time and may not reflect real-time interference conditions.
Innovation Solution
The solution involves requesting neighboring base stations to emulate either a typical interference signal or non-interference signal during scheduled transmission periods when they are inactive, allowing user equipment (UE) to perform accurate interference measurements and report back to the serving base station, thereby capturing expected interference or non-interference conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If interference measurements are averaged over time, then measurement stability is improved, but measurement precision deteriorates because intermittent base station activity causes the average not to reflect real-time interference conditions
Solution Approach 1:
The system performs preliminary actions by having the interfering base station transmit typical interference signals during scheduled transmission periods before actual data transmission occurs. This allows the UE to pre-measure and report CQI values that accurately reflect expected interference conditions, resolving the contradiction between measurement stability and precision by establishing accurate baseline measurements in advance.
Solution Approach 2:
The patent uses copying by having the interfering base station transmit typical interference signals that replicate real interference conditions during scheduled periods when the station would normally be active. These copied interference patterns allow the UE to measure and report accurate CQI values without requiring continuous actual interference presence, thus maintaining both measurement stability and precision.
2Measurement precision
If neighboring base stations transmit typical interference signals during scheduled periods, then measurement precision is improved, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent applies universality by designing a multi-functional coordination mechanism where the serving base station simultaneously performs interference measurement coordination, resource allocation, and CQI reporting management. The interfering base station's transmission function serves dual purposes: normal data transmission and interference signal transmission for measurement purposes. This consolidation reduces overall system complexity while maintaining measurement precision.
Data Source
AI summary
Embodiments of the present disclosure describe techniques and configurations for handling interference measurements in a wireless communication network. An apparatus may include computer-readable media having instructions and processors coupled with the computer-readable media and configured to execute the instructions to identify, for a serving eNB, a neighboring eNB for which signal interference measurements are to be performed by one or more wireless devices served by the serving eNB, and request that the neighboring eNB transmit typical interference signals within data units which are configured for, and may or may not have, a scheduled physical downlink shared channel transmission. The wireless devices may be configured to perform the signal interference measurements based at least in part on the typical interference signals, which may include non-zero-power signals or zero-power signals. Other embodiments may be described and claimed.