IntRR: A Framework for Integrating SID Redistribution and Length Reduction

• URL: http://arxiv.org/abs/2602.20704v1
• Date: Tue, 24 Feb 2026 09:09:40 GMT
• Title: IntRR: A Framework for Integrating SID Redistribution and Length Reduction
• Authors: Zesheng Wang, Longfei Xu, Weidong Deng, Huimin Yan, Kaikui Liu, Xiangxiang Chu,
• Abstract summary: We propose IntRR, a novel framework that integrates objective-aligned SID Redistribution and structural Length Reduction.<n>IntRR yields substantial improvements over representative generative baselines, achieving superior performance in both recommendation accuracy and efficiency.
• Score: 14.327886721362647
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Generative Recommendation (GR) has emerged as a transformative paradigm that reformulates the traditional cascade ranking system into a sequence-to-item generation task, facilitated by the use of discrete Semantic IDs (SIDs). However, current SIDs are suboptimal as the indexing objectives (Stage 1) are misaligned with the actual recommendation goals (Stage 2). Since these identifiers remain static (Stage 2), the backbone model lacks the flexibility to adapt them to the evolving complexities of user interactions. Furthermore, the prevailing strategy of flattening hierarchical SIDs into token sequences leads to sequence length inflation, resulting in prohibitive computational overhead and inference latency. To address these challenges, we propose IntRR, a novel framework that integrates objective-aligned SID Redistribution and structural Length Reduction. By leveraging item-specific Unique IDs (UIDs) as collaborative anchors, this approach dynamically redistributes semantic weights across hierarchical codebook layers. Concurrently, IntRR handles the SID hierarchy recursively, eliminating the need to flatten sequences. This ensures a fixed cost of one token per item. Extensive experiments on benchmark datasets demonstrate that IntRR yields substantial improvements over representative generative baselines, achieving superior performance in both recommendation accuracy and efficiency.

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