Beam Handover Control for Network Energy Saving
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing network energy consumption during beam handovers, particularly in varying QoS classes like URLLC and eMBB, leading to resource load variations and inefficiencies.
Innovation Solution
Implementing a network energy saving handover configuration that includes beam-specific resource indications and criteria, allowing user equipment to determine optimal handover based on signal strength, and facilitating communication context transfer between nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional handover procedures are used in wireless communication systems, then handover operations can be performed, but network energy consumption increases and resource load variations occur
Solution Approach 1:
The system performs preliminary actions by configuring user equipment with handover parameters and resource indications before actual handover is needed. The network provides beam-specific resource configurations and handover criteria in advance, allowing UE to autonomously determine handover timing based on signal strength measurements, thereby avoiding energy-intensive network-controlled handover procedures.
Solution Approach 2:
User equipment is empowered to autonomously perform handover decisions based on pre-configured criteria and beam-specific resource indications. The UE monitors serving beam signal strength against thresholds and autonomously initiates handover when conditions are met, eliminating the need for continuous network control signaling and reducing overall network energy consumption.
2Measurement precision
If beam-specific resource indications are provided for handover configuration, then handover precision and energy efficiency improve, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by providing beam-specific resource indications and handover parameters tailored to each serving beam rather than using generic configurations. Each beam has its own resource indications and threshold criteria, allowing precise handover decisions based on local beam conditions while maintaining manageable complexity through structured configuration.
3Loss of energy
If network energy saving handover configuration is implemented, then unnecessary resource usage is reduced, but signaling overhead increases
Solution Approach 1:
The system merges handover configuration information with existing beam management signaling. Beam-specific resource indications are integrated into beam indication messages, and handover parameters are combined with downlink beam configurations, thereby reducing overall signaling overhead while still providing comprehensive handover guidance to user equipment.
Data Source
AI summary
A source radio access network node may determine to implement a network energy saving mode with respect to one or more user equipment being served by a beam. The node may configure the user equipment with a handover control channel resource usable by the user equipment to determine scheduling information usable by the user equipment to retrieve a handover information message. The handover information message may comprise a list of potential target nodes and a list of user equipment to be handed over to a target node. A user equipment may determine whether to monitor the handover control channel resource based on whether a handover criterion is satisfied. The user equipment may initiate handover to a target node if the user equipment is indicated in the handover information message or if the handover criterion is violated. The user equipment may transmit, to the source node, a handover success message.