Mobility Reference Signal Coordination for Handover Optimization
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Solution Overview
Problem
Current wireless communication networks face challenges in reducing energy consumption and network load, and minimizing handover delays due to the continuous transmission of reference signals for mobility, which can lead to increased processing power consumption and potential dropped connections during handover procedures.
Innovation Solution
Implementing a dynamic usage of Mobility Reference Signals (MRS) by coordinating their transmission between access nodes, where each access node determines the identity of relevant MRS and transmits them only when needed, reducing unnecessary signaling and optimizing beam selection for improved handover efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals for mobility are continuously transmitted to support handover, then service continuity and handover reliability are improved, but energy consumption and network load increase
Solution Approach 1:
The patent implements periodic transmission of reference signals for mobility instead of continuous transmission. The access nodes transmit reference signals at specific intervals or occasions, which reduces energy consumption and network load while still providing sufficient information for handover decisions to maintain service continuity.
Solution Approach 2:
The patent extracts and transmits only the necessary reference signals for mobility at specific occasions rather than continuously transmitting all reference signals. This selective transmission approach reduces the overall signaling load and energy consumption while maintaining handover reliability.
2Measurement precision
If reference signals for mobility are continuously transmitted, then measurement accuracy for handover is improved, but processing power consumption increases
Solution Approach 1:
The patent applies periodic transmission of reference signals, where measurements are performed at specific intervals rather than continuously. This reduces the processing power consumption at both the access nodes and the wireless communication device while maintaining adequate measurement accuracy for handover decisions.
Solution Approach 2:
The patent uses partial action by transmitting reference signals only when necessary for handover evaluation rather than continuously. This provides sufficient measurement data for accurate handover decisions without the excessive processing burden of continuous transmission and measurement.
3Measurement precision
If reference signals for mobility are transmitted on all beams, then beam selection accuracy is improved, but network load increases
Solution Approach 1:
The patent extracts and transmits reference signals only on specific beams that are relevant for handover at given occasions, rather than transmitting on all beams continuously. This reduces network load while maintaining beam selection accuracy for the most relevant candidate beams.
Solution Approach 2:
The patent applies local quality by concentrating reference signal transmission on specific beams in specific directions rather than uniformly across all beams. This targeted approach reduces overall network load while ensuring accurate measurement for the most relevant beam candidates for handover.
Data Source
AI summary
A first access node obtains (601) an identity of a plurality of MRSs associated with the first access node, determines (602) an identity of a second mobility beam associated with a second access node, which second mobility beam is a neighbour mobility beam to a first mobility beam associated with the first access node, wherein the identity of the second mobility beam is determined based on a neighbour relation between the second mobility beam and the first mobility beam, and controls the transmission of MRSs by transmitting (605), to the second access node, a request to transmit a reference signal for mobility comprised in the plurality of MRSs, on the second mobility beam, and wherein the request comprises: a respective identity of one or more MRSs comprised in the plurality of MRSs, which respective identity is based on the identity of the plurality of MRSs, and the identity of the second mobility beam.