aiqbench analysis
This research addresses instability in Mixture-of-Experts models by introducing a framework that fuses cross-layer semantic signals to ensure consistent expert routing decisions. By mitigating context incompleteness, the approach improves downstream performance on language modeling benchmarks compared to standard baselines. The work underscores the critical need for deeper contextual awareness when scaling Transformer architectures via MoE structures.
Multi-level context Modeling for consistent expert selection in Mixture-of-Experts
arXiv:2607.16427v1 Announce Type: new Abstract: Mixture-of-Experts (MoE) enables efficient scaling of Transformer models by routing tokens to a small subset of experts. However, existing routers typically condition expert selection on shallow or isolated token representations, which often produce unstable and semantically inconsistent routing decisions across layers. In this work, we revisit expert selection from a representation perspective and identify context incompleteness as a key bottleneck limiting effective expert specialization. To address this issue, we propose Multi-level Context Fusion MOE (MCF-MOE), a framework that constructs context-aware representations by integrating complementary signals from cross-layer semantic aggregation and local token-level interactions, enabling more informative and consistent expert selection. Experiments on language modeling and understanding benchmarks demonstrate that MCF-MOE consistently improves routing consistency and downstream performance over strong MoE baselines, highlighting the importance of contextual completeness in expert routing. The code is available at https://anonymous.4open.science/r/MCFMOE.
Abstract:Mixture-of-Experts (MoE) enables efficient scaling of Transformer models by routing tokens to a small subset of experts. However, existing routers typically condition expert selection on shallow or isolated token representations, which often produce unstable and semantically inconsistent routing decisions across layers. In this work, we revisit expert selection from a representation perspective and identify context incompleteness as a key bottleneck limiting effective expert specialization. To address this issue, we propose Multi-level Context Fusion MOE (MCF-MOE), a framework that constructs context-aware representations by integrating complementary signals from cross-layer semantic aggregation and local token-level interactions, enabling more informative and consistent expert selection. Experiments on language modeling and understanding benchmarks demonstrate that MCF-MOE consistently improves routing consistency and downstream performance over strong MoE baselines, highlighting the importance of contextual completeness in expert routing. The code is available at this https URL.
Computation and Language (cs.CL)
arXiv:2607.16427 [cs.CL]
(or arXiv:2607.16427v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2607.16427 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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