Target Node Selection Using Power-Saving Mode Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently selecting a target node during handover procedures in over-deployed integrated access and backhaul (IAB) networks, particularly when neighbor nodes have different operating modes, leading to suboptimal performance due to factors like power-saving modes and battery life, which traditional selection methods fail to consider.
Innovation Solution
Implement techniques that account for the operating modes of neighbor nodes, such as power-saving modes and battery status, during handover and cell selection procedures in IAB networks, using reference signal measurements and reports to identify optimal target nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover selection methods are used that only consider signal strength, then the selection process is simple, but the network performance and energy efficiency deteriorate due to ignoring power-saving modes and battery status
Solution Approach 1:
The system performs preliminary classification of neighbor nodes into different operating mode groups (power-saving mode vs. active mode) before the actual handover decision. This preliminary action allows the UE to organize measurement results in a way that facilitates energy-efficient selection without complicating the final decision process, as the grouping structure is prepared in advance based on reference signal measurements
Solution Approach 2:
The neighbor nodes are segmented into distinct groups based on their operating modes (power-saving mode and active mode). This segmentation allows the system to apply different selection criteria to different groups, enabling energy-efficient handover decisions by preferentially selecting nodes in power-saving mode when appropriate, while maintaining simple selection logic within each segment
2Use of energy by moving object
If nodes in power-saving mode are selected as target nodes, then energy consumption is reduced, but the risk of service interruption increases due to potential node dormancy
Solution Approach 1:
The system implements feedback mechanisms where UEs report measurement results including reference signal received power (RSRP) and reference signal received quality (RSRQ) for nodes in different operating modes. This feedback enables the network to monitor the status of power-saving mode nodes and dynamically adjust handover decisions based on actual signal quality, ensuring service continuity while maintaining energy efficiency
Solution Approach 2:
The system changes the selection parameters by considering both signal strength metrics (RSRP, RSRQ) and operating mode status together. By introducing operating mode as an additional parameter in the selection criteria, the system can balance energy consumption and service reliability, selecting power-saving mode nodes when signal quality is sufficient while maintaining the ability to switch to active mode nodes when needed
3Use of energy by moving object
If multiple operating modes are considered during handover, then energy efficiency improves, but the measurement and reporting complexity increases
Solution Approach 1:
The system uses universal measurement procedures that work for both power-saving mode and active mode nodes. The same reference signal measurement mechanisms (RSRP, RSRQ) are used for all neighbor nodes regardless of their operating mode, eliminating the need for separate measurement procedures. This multi-functional approach enables energy-efficient selection without increasing measurement complexity, as the existing measurement infrastructure is leveraged for both node types
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless node may receive an indication of a plurality of sets of reference signal identifiers, wherein each set of reference signal identifiers of the plurality of sets of reference signal identifiers identifies reference signals of candidate neighbor nodes associated with the set, and wherein each candidate neighbor node associated with the set is in a same operating mode, and transmit a measurement report based at least in part on measuring one or more reference signals identified in the plurality of sets of reference signal identifiers. Numerous other aspects are provided.