Wireless Handover Based on Power Headroom and Packet Drops
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Solution Overview
Problem
In wireless networks, congestion at cell site routers leads to packet drops, which require wireless devices to re-transmit data, consuming additional resources and power, resulting in a sub-optimal user experience, especially for devices with low power headroom.
Innovation Solution
Implementing a system that identifies wireless devices with low power headroom and initiates handover from access nodes or frequency bands with higher packet drop incidence to those with lower incidence, optimizing data transmission by switching to access nodes or frequency bands with fewer packet drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission continues on the first frequency band despite congestion, then the wireless device maintains connection stability, but packet drops increase and power headroom decreases
Solution Approach 1:
The system performs preliminary detection of packet drops and power headroom status before critical failures occur. By monitoring these parameters in advance and triggering handover proactively, the system prevents severe packet loss and maintains connection reliability without waiting for complete buffer exhaustion or service interruption.
Solution Approach 2:
The system implements continuous feedback loops by monitoring packet drop rates and power headroom levels at the wireless device, and using this information to dynamically adjust handover decisions. The feedback mechanism enables the system to adapt to changing network conditions and optimize the balance between connection stability and packet loss prevention.
2Reliability
If re-transmission of dropped packets is performed, then data integrity is maintained, but additional network resources and device power are consumed
Solution Approach 1:
The system performs preliminary handover to a less congested frequency band before packet drops occur or before the device exhausts its power headroom. This proactive approach prevents packet loss at the source, eliminating the need for energy-consuming re-transmissions and preserving both data integrity and device power.
Solution Approach 2:
The system converts the potentially harmful situation of low power headroom and congestion into a beneficial outcome by using these conditions as triggers for handover. Rather than allowing packet drops and subsequent energy-intensive re-transmissions, the system uses the congestion indicators to initiate timely frequency band switching, thereby preventing the harmful cycle of drops and re-transmissions.
3Reliability
If handover is initiated based on packet drops and power headroom, then quality of service improves, but handover timing and frequency selection complexity increases
Solution Approach 1:
The wireless device autonomously monitors its own power headroom status and packet drop rates, making handover decisions based on locally available measurements. This self-service approach reduces the need for complex centralized control and simplifies the handover management architecture while maintaining high quality of service through device-driven optimization.
Solution Approach 2:
The system changes operational parameters (frequency band) based on measured conditions (packet drop rate, power headroom). By dynamically adjusting the frequency band parameter in response to changing network conditions, the system improves quality of service without requiring complex algorithmic control, relying instead on parameter-based decision thresholds.
Data Source
AI summary
A method for initiating handover of a wireless device includes identifying a wireless device exhibiting a low power headroom, the wireless device being attached to an access node on a first frequency band, determining a first incidence of packet drops associated with a data transmission from the wireless device on the first frequency band at a cell site router, and determining a second incidence of packet drops associated with another data transmission on a second frequency band of the access node at the cell site router. Based at least in part on the first incidence of packet drops being greater than the second incidence of packet drops, handover of the wireless device from the first frequency band to the second frequency band is initiated. Systems and devices relate to initiating handover of a wireless device.