Dynamic Handover Parameter Adjustment for Dual-Connectivity Packet Drop Mitigation
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Solution Overview
Problem
Existing techniques for managing handovers in dual-connectivity wireless networks fail to account for packet drops at shared routers, leading to sub-par network performance and exacerbated congestion, as they do not consider the inter-node communication and data flow between paired access nodes.
Innovation Solution
Implementing a method to monitor packet drops at shared network devices and dynamically adjust handover parameters to inhibit handovers to node-pairs experiencing high packet drops, thereby preventing further connections that could worsen congestion and improving wireless device experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If handover parameters are adjusted to allow more handovers to dual-connectivity node-pairs, then network throughput and connectivity are improved, but packet drops increase and congestion is exacerbated
Solution Approach 1:
The handover parameters are made dynamic rather than static, allowing the system to adapt to changing network conditions. The access node continuously monitors packet drop rates and adjusts handover parameters in real-time, transitioning between allowing handovers when conditions are good and inhibiting them when congestion is detected, thus resolving the contradiction between maintaining high throughput and preventing packet drops
Solution Approach 2:
The system implements a feedback mechanism where the access node monitors packet drop rates at the shared router and uses this information to adjust handover parameters. When packet drops exceed a threshold, the system feedbacks this condition and adjusts parameters to inhibit handovers, thereby preventing further congestion while maintaining network throughput during normal operation
2Reliability
If handover parameters are adjusted to inhibit handovers to node-pairs with high packet drops, then packet drop rate is reduced, but network throughput and connectivity deteriorate
Solution Approach 1:
The system dynamically adjusts handover parameters based on real-time packet drop rate monitoring, allowing the network to switch between two operational states: permitting handovers when packet drops are low (maintaining throughput) and inhibiting handovers when packet drops are high (reducing congestion). This dynamic adaptation resolves the contradiction by making the system responsive to actual network conditions rather than using fixed parameters
Solution Approach 2:
The system changes handover parameters (such as handover thresholds, hysteresis values, or timing parameters) based on the monitored packet drop rate. When packet drops exceed a threshold, parameters are adjusted to make handovers less likely; when packet drops are low, parameters are adjusted to facilitate handovers. This parameter adaptation allows the system to balance reliability and productivity based on current network state
3Device complexity
If existing handover techniques are used in dual-connectivity networks, then implementation complexity is low, but they fail to account for inter-node communication and packet drops at shared routers
Solution Approach 1:
The access node acts as an intermediary that monitors packet drop rates at the shared router and mediates handover decisions. By positioning the monitoring and parameter adjustment functionality at the access node (which has visibility into both wireless conditions and router performance), the system accounts for inter-node communication effects without requiring complex coordination between multiple nodes, thus maintaining relatively low implementation complexity while improving handover performance
Data Source
AI summary
A system may include an access node to deploy a radio air interface to provide wireless services to one or more wireless devices. The access node may include processing circuitry. The processing circuitry of the access node may monitor an amount of packet drops at a shared network device of a dual connectivity access-node-pair. The processing circuitry of the access node may dynamically adjust one or more handover parameters based on the amount of packet drops at the shared network device. The handover parameters may be adjusted to inhibit handovers to the dual connectivity access-node-pair.