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Engineering LaCAM$^\ast$: Towards Real-Time, Large-Scale, and Near-Optimal Multi-Agent Pathfinding

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arxiv 2308.04292 v2 pith:WEUIGL3H submitted 2023-08-08 cs.AI cs.MAcs.RO

classification cs.AIcs.MAcs.RO
keywords lacammapfalgorithmlarge-scalemethodsmulti-agentnear-optimaloptimal
verification ladder T0 review T1 audit T2 compute T3 formal
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This paper addresses the challenges of real-time, large-scale, and near-optimal multi-agent pathfinding (MAPF) through enhancements to the recently proposed LaCAM* algorithm. LaCAM* is a scalable search-based algorithm that guarantees the eventual finding of optimal solutions for cumulative transition costs. While it has demonstrated remarkable planning success rates, surpassing various state-of-the-art MAPF methods, its initial solution quality is far from optimal, and its convergence speed to the optimum is slow. To overcome these limitations, this paper introduces several improvement techniques, partly drawing inspiration from other MAPF methods. We provide empirical evidence that the fusion of these techniques significantly improves the solution quality of LaCAM*, thus further pushing the boundaries of MAPF algorithms.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Search-Aided Joint Agent-Environment Reinforcement Learning for Robust Lifelong Multi-Agent Path Finding with Rotations

    cs.RO 2026-08 conditional novelty 7.0 of 10

    A joint reinforcement learning framework that co-trains robot movement policy and global edge-cost guidance to beat strong baselines in lifelong multi-agent path finding with rotation and safety constraints.

  2. PRIMAL3: Pathfinding via Reinforcement and Imitation Multi-Agent Learning - Leveraging LaCAM3

    cs.RO 2026-08 conditional novelty 6.0 of 10

    A dual-graph, reinforcement-and-imitation learning framework for MAPF that scales to 100,000 agents, with results close to search-based solvers on random maps.

  3. Adaptive-Horizon Conflict-Based Search for Closed-Loop Multi-Agent Path Finding

    cs.RO 2026-02 conditional novelty 6.0 of 10

    ACCBS is a closed-loop CBS variant whose planning horizon grows with the available computation budget while reusing a single constraint tree, giving anytime behavior and conditional asymptotic optimality.

  4. CADENCE: Predicting Realized MAPF Execution Time Beyond Sum of Costs

    cs.RO 2026-06 unverdicted novelty 4.0 of 10

    On a seven-robot hardware testbed, plan-level motion burden (turns, stop-starts, makespan) predicts realized execution time far better than sum-of-costs alone, while interaction-aware features add only modest, less ce...

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