Energy-Saving Route Calculation Using Speed Profile Segmentation
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Solution Overview
Problem
Existing methods for determining energy-saving routes rely on simplified consumption models, leading to rough predictions and high computational requirements, failing to account for traffic network characteristics, driver habits, and real-time traffic situations effectively.
Innovation Solution
A method that subdivides route segments into portions with predefined speed profiles, assigns energy consumption values based on these profiles, and calculates weights for route segments to determine energy-saving routes, using pre-calculated values stored in an assignment table, allowing for efficient and realistic energy consumption modeling without excessive computational burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed consumption models are implemented to account for traffic-route network characteristics, driver habits, and traffic situations, then energy-saving route accuracy is improved, but computing capacity requirements increase significantly
Solution Approach 1:
The patent divides route segments into multiple portions based on speed profile changes, allowing detailed energy consumption analysis only where speed variations occur. This segmentation enables accurate energy modeling without processing every segment uniformly, reducing overall computational load while maintaining precision where needed.
Solution Approach 2:
The patent pre-calculates and stores energy consumption values for different speed profiles in lookup tables before route determination. By performing this computation in advance rather than during real-time route calculation, the system achieves accurate energy-based routing without burdening the computing resources during actual navigation operations.
2Measurement precision
If route segments are subdivided into portions with predefined speed profiles and energy consumption values are assigned, then energy consumption modeling accuracy is improved, but data processing complexity increases
Solution Approach 1:
The patent transforms continuous speed variations into discrete predefined speed profiles with associated energy consumption values. By parameterizing speed changes into standardized profiles stored in lookup tables, the system achieves accurate energy modeling through manageable discrete states rather than continuous complex calculations.
Solution Approach 2:
The patent introduces predefined speed profiles as an intermediary layer between raw route geometry and energy consumption calculation. These profiles act as a mediator that translates physical route characteristics into standardized energy values, simplifying the overall data processing architecture while maintaining modeling accuracy.
3Reliability
If weights are calculated for route segments based on energy consumption values, then energy-saving route determination is improved, but calculation time increases
Solution Approach 1:
The patent pre-calculates energy consumption values and stores them in lookup tables before route determination. By having these values ready in advance, the system can quickly retrieve and apply them during route calculation without performing complex energy computations in real-time, thus maintaining reliability while minimizing calculation time.
Solution Approach 2:
The patent uses predefined speed profiles as templates that can be copied and applied to multiple route segments with similar characteristics. Instead of calculating energy consumption independently for each segment, the system copies proven energy values from matching profiles, significantly reducing calculation time while maintaining determination reliability.
Data Source
AI summary
A technique is described for determining an energy-saving route between two geographic positions on the basis of predefined cartographic data, the cartographic data describing a real traffic route network in the form of route segments and route nodes. A method aspect comprises the steps of subdividing the route segments provided for a route calculation into route segment portions that each have a predefined speed profile, providing an energy consumption value to be expected for each of the route segment portions, on the basis of the respectively assigned speed profile, and calculating weights for the respective route segments on the basis of the energy consumption values provided for the route segment portions, wherein the weights can be used to determine the energy-saving route in the context of the route calculation.