Cell Reselection Priority in Network Energy Saving Cells
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Solution Overview
Problem
Existing network energy saving techniques in wireless communication increase latency and impact radio resource management and quality of service for user equipment, especially for legacy UEs, due to techniques like reduced synchronization signal block transmissions and cell discontinuous reception.
Innovation Solution
Implementing methods for network energy-saving (NES) capable user equipment (UE) to prioritize non-NES cells for initial access and reselection by using relaxed RRM requirements, identifying NES cells through various criteria, and applying priority scaling factors to enhance cell selection and reselection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If network energy saving techniques are implemented (reduced synchronization signal block transmissions, cell discontinuous reception), then energy consumption is reduced, but access latency increases and radio resource management performance deteriorates
Solution Approach 1:
The patent applies local quality by differentiating cell types (NES vs non-NES) and applying different selection criteria to different user equipment based on their capabilities. NES-capable UEs are directed to non-NES cells for initial access to avoid latency, while legacy UEs are steered away from NES cells. This localized differentiation resolves the contradiction by allowing energy saving in specific cells without impacting overall access latency for all users.
Solution Approach 2:
The patent implements preliminary action by pre-configuring cell priority information and capability indicators in system broadcast messages before UEs need to access the network. NES-capable UEs receive advance information about which cells are non-NES cells with better access characteristics, allowing them to proactively select optimal cells for initial access, thereby avoiding latency issues before they occur.
2Use of energy by moving object
If network energy saving techniques are implemented, then base station transmission energy is reduced, but radio resource management performance deteriorates
Solution Approach 1:
The patent differentiates between NES and non-NES cells, applying different RRM strategies to each. Non-NES cells maintain full RRM performance for NES-capable UEs, while NES cells operate with energy-saving configurations. This localized quality differentiation allows the network to achieve energy savings without compromising overall RRM reliability, as critical functions are maintained in non-NES cells.
Solution Approach 2:
The patent introduces capability indicators and cell priority information as intermediary elements that mediate between energy saving requirements and RRM performance. These intermediaries carry information about UE capabilities and cell characteristics, enabling intelligent routing of UEs to appropriate cell types, thus maintaining RRM reliability while achieving energy savings.
3Use of energy by moving object
If network energy saving techniques are implemented, then reception energy is reduced, but quality of service deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct service zones through different cell types. Non-NES cells provide high-quality service with full reception capabilities for NES-capable UEs, while NES cells provide energy-saving service. This spatial differentiation of service quality allows the network to reduce overall reception energy while maintaining QoS for users who require it.
Solution Approach 2:
The patent implements preliminary action by broadcasting cell priority information and capability indicators before UEs attempt access. This allows UEs to pre-select cells that match their QoS requirements, avoiding situations where energy-saving modes would degrade service. By acting in advance, the system prevents QoS deterioration rather than reacting to it.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for cell selection and reselection in network energy saving networks.