Heterogeneous Cell Energy-Saving Control via Dynamic Exit Requests
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Solution Overview
Problem
Existing energy-saving control methods for cells in heterogeneous systems are limited, as they cannot smoothly manage service quality when multi-mode user equipment moves between cells with different radio access technologies, leading to service degradation.
Innovation Solution
An energy-saving control method that involves an access control device requesting neighboring cells in a heterogeneous system to exit energy-saving mode when a serving cell cannot satisfy a service request, and an evolved base station determining whether to enter an energy-saving state based on the presence of active user equipment or zero-load periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the serving cell enters energy-saving state to reduce energy consumption, then energy efficiency is improved, but service quality deteriorates when multi-mode UE moves between cells
Solution Approach 1:
The patent implements dynamic energy-saving control where cells can transition between normal state and energy-saving state based on real-time traffic conditions. The access control device dynamically adjusts the operational state of neighboring cells in response to service requests, allowing the system to adapt its energy consumption and service provision according to actual demand patterns.
Solution Approach 2:
The access control device acts as an intermediary that coordinates between the serving cell and heterogeneous-system neighboring cells. When the serving cell cannot satisfy a service request and the neighboring cell is in energy-saving state, the access control device sends an exit energy-saving state request message to the neighboring cell, thereby mediating the transition from energy-saving mode to active service provision.
2Device complexity
If the serving cell monitors only its own traffic load threshold, then control complexity is reduced, but service quality deteriorates due to inability to coordinate with heterogeneous cells
Solution Approach 1:
The access control device performs multiple functions: it monitors traffic load thresholds of the serving cell, evaluates service request satisfaction capability, determines energy-saving state of neighboring cells, and coordinates exit from energy-saving state. This multi-functional approach allows a single device to handle both local and coordinated control tasks without requiring separate specialized systems.
Solution Approach 2:
The system implements feedback mechanisms where the access control device continuously monitors traffic load conditions and service request outcomes. When service requests cannot be satisfied and neighboring cells are in energy-saving state, the device triggers appropriate actions and receives feedback on the results, enabling continuous optimization of both service quality and energy efficiency.
Data Source
AI summary
The present invention provides an energy-saving control method for a cell in a heterogeneous system, including: receiving, by an access control device of a serving cell, a service request of a multi-mode user equipment UE; and when a radio resource of the serving cell cannot satisfy the service request of the multi-mode UE, if the access control device of the serving cell determines that a heterogeneous-system neighboring cell of the serving cell is in an energy-saving state, sending, by the access control device of the serving cell, an exit energy-saving state request message to an access control device of the heterogeneous-system neighboring cell, where the exit energy-saving state request message is used to request the heterogeneous-system neighboring cell to exit the energy-saving state. The technical solution implements energy-saving control for a cell in a heterogeneous system.