Control Node Handover via Uplink Beacon Measurement
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Solution Overview
Problem
In wireless communication networks, especially in dense and ultra-dense scenarios, the existing handover processes between User Equipment (UE) and network entities are time-consuming and prone to failures due to the UE's involvement in signaling, leading to increased latency and potential handover failures, particularly in 5G networks with stringent latency requirements.
Innovation Solution
A mechanism where a first Control Node (CNd) selects a serving CNd for a User Node (UNd) by communicating with a second CNd, using uplink beacon measurement reports to preliminarily select and confirm the serving CNd without involving the UNd in the process, thereby reducing latency and energy consumption at the UNd.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE initiates mobility management procedures by reporting measurements back to the network, then the handover process can be completed with network coordination, but the procedure becomes time-consuming and prone to link failures in dense small cell scenarios
Solution Approach 1:
The invention extracts the measurement reporting function from the UE and relocates it to the network side (ANd/CNd). The UE no longer needs to perform measurements or send measurement reports, eliminating the time-consuming signaling chain involving the UE. Instead, the network autonomously performs measurements and triggers handovers, directly resolving the contradiction between reliability and latency.
Solution Approach 2:
The invention introduces the ANd/CNd as an intermediary that performs measurements on uplink beacons and autonomously makes handover decisions. This intermediary eliminates the need for UE involvement in measurement reporting, reducing signaling latency and preventing link failures while maintaining network-coordinated handover reliability.
2Reliability
If the UE performs measurements and sends measurement reports, then the network can make informed handover decisions, but the UE consumes excessive energy and the process increases overall latency
Solution Approach 1:
The invention extracts the measurement function from the UE and assigns it to the network side (ANd/CNd). The UE simply transmits uplink beacons without performing measurements or sending reports, dramatically reducing UE energy consumption while maintaining accurate handover decisions through network-side measurements.
Solution Approach 2:
The network (ANd/CNd) performs measurements on uplink beacons autonomously without requiring UE participation. The network serves itself by making handover decisions based on its own measurements, eliminating the energy-consuming measurement and reporting tasks from the UE while preserving decision accuracy.
3Reliability
If the UE is involved in signaling for handover, then the network can maintain control over the process, but the signaling complexity increases and handover failures occur due to poor link conditions
Solution Approach 1:
The invention extracts the measurement reporting signaling from the UE and relocates it to the network side. The UE only transmits uplink beacons, eliminating complex measurement report signaling and reducing overall signaling complexity while maintaining network control through autonomous network-side decision-making.
Solution Approach 2:
Instead of the UE measuring and reporting to the network, the invention inverts the process by having the network measure the UE's uplink beacons and make decisions. This inversion eliminates the need for UE-to-network measurement signaling, reducing complexity and preventing failures associated with poor uplink conditions during measurement reporting.
Data Source
AI summary
A first Control Node (CNd) and a method therein, for selecting a serving CNd for a User Node (UNd) by communication with at least a second CNd. The first CNd is configured to receive an uplink beacon measurement report comprising at least one measurement of an UNd uplink beacon, from at least one Access Node (ANd) controlled by the first CNd. The first CNd is further configured to preliminarily select a serving CNd for the UNd, based on the received uplink beacon measurement report concerning the UNd; confirm the preliminarily selected serving CNd by communication with the second CNd; and, select serving CNd for the UNd when the preliminarily selected serving CNd is confirmed by the second CNd.