Discovery Reference Signal Occasion Configuration for Small Cell Interference
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Solution Overview
Problem
In wireless communication systems, the concurrent transmission of discovery reference signals from multiple small cells and transmission points within the same subframe causes significant interference, degrading signal reception and measurement accuracy for user equipment.
Innovation Solution
Configuring separate subframes for activated and deactivated small cells within the discovery reference signal occasion, allowing user equipment to distinguish and accurately measure signals from small cells and transmission points by using different subframes and specific reference signals like CSI-RS for transmission points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If discovery reference signals are transmitted concurrently from multiple small cells in the same subframe, then system coverage and capacity are improved, but signal interference increases and measurement accuracy degrades
Solution Approach 1:
The patent segments the discovery reference signal transmission by dividing small cells into two groups: activated small cells transmit in first subframes while deactivated small cells transmit in second subframes. This temporal segmentation eliminates concurrent transmissions from multiple small cells, resolving the interference problem while maintaining the ability to discover both activated and deactivated cells.
2Measurement precision
If separate subframes are configured for activated and deactivated small cells, then signal interference is reduced and measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements periodic action by establishing regular transmission patterns where activated small cells transmit discovery reference signals in first subframes and deactivated small cells transmit in second subframes. This periodic structure simplifies the configuration management compared to arbitrary scheduling, as the pattern repeats consistently across time periods.
Data Source
AI summary
This disclosure generally relates to a discovery reference signal occasion configuration. In one embodiment, a time period for transmission of a discovery reference signal may be obtained, which comprises a plurality of consecutive subframes. Furthermore, at least one first subframe of the time period may be configured for transmission of discovery reference signals from activated small cells, and at least one second subframe of the time period may be configured for transmission of discovery reference signals from deactivated small cells, wherein the at least one second subframe is different from the at least one first subframe. In this way, the activated small cells and the deactivated small cells may transmit discovery reference signals in different subframes within the discovery reference signal occasion such that the interferences of transmission of discovery reference signals may be significantly reduced.