Downlink Power Control Using Anchor-Cell Offsets for Sleeping Cells
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Solution Overview
Problem
Current wireless communication systems face challenges in balancing network energy savings with network functionality, as deactivating cells to reduce energy consumption compromises the ability to monitor channel state and quickly activate cells for data transmission.
Innovation Solution
Implementing reference signal configurations that allow user equipment to determine transmission power levels for inactive cells based on transmission power offsets from an active 'anchor' cell, enabling power control without actual reference signal transmission from the inactive cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cells are deactivated to reduce energy consumption, then energy savings are improved, but the ability to monitor channel state and quickly activate cells for data transmission deteriorates
Solution Approach 1:
The patent extracts the essential power control information from the inactive cell by using reference signal configurations that carry power control offsets. This allows the network to deactivate cells for energy savings while maintaining the ability to quickly reactivate them, as the power control parameters are pre-configured and stored in the reference signal configuration rather than requiring continuous transmission from the inactive cell.
Solution Approach 2:
The patent applies preliminary action by pre-configuring reference signal configurations with power control offsets for inactive cells before deactivation. This allows the user equipment to have all necessary power control information ready in advance, enabling rapid cell activation and data transmission without delay when the cell needs to be reactivated, thus resolving the contradiction between energy savings and quick activation capability.
2Reliability
If reference signals are transmitted from inactive cells to maintain channel state monitoring, then network functionality is preserved, but energy consumption increases
Solution Approach 1:
The patent extracts the necessary network functionality from continuous reference signal transmission by using pre-configured reference signal configurations. The power control offsets are extracted and stored in the configuration, allowing the network to maintain functionality through configuration data rather than continuous signal transmission, thereby reducing energy consumption while preserving network capabilities.
Solution Approach 2:
The patent uses copying by creating reference signal configurations that replicate the essential power control information of active cells for inactive cells. These configurations serve as copies of the necessary control parameters, enabling the network to maintain functionality without the energy cost of continuous reference signal transmission from inactive cells.
3Manufacturing precision
If transmission power control offsets are configured for multiple cells, then downlink power control accuracy is improved, but configuration complexity increases
Solution Approach 1:
The patent applies universality by designing a reference signal configuration structure that serves multiple cells simultaneously. The same configuration framework used for active cells is extended to inactive cells, allowing power control offsets to be configured for multiple cells using a unified approach. This reduces the incremental complexity of adding multi-cell support while maintaining accurate downlink power control across all cells.
Data Source
AI summary
Certain aspects of the present disclosure provide reference signal configurations including transmission power control offsets for multiple cells. In one example, a network entity obtains a reference signal configuration that comprises one or more transmission power control offsets for a first cell and one or more transmission power control offsets for a second cell.