A bitmap-based variable-length block sketch method and system
The variable-length block Sketch method guided by bitmaps solves the problems of storage space waste and adaptability of Sketch structure in sparse traffic scenarios, and achieves efficient traffic statistics and accurate frequency estimation, which is suitable for large-scale network measurement and traffic analysis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAMEN UNIV
- Filing Date
- 2026-04-17
- Publication Date
- 2026-07-17
AI Technical Summary
The existing Sketch architecture wastes storage space and lacks adaptability in network traffic statistics. It is difficult to balance measurement accuracy and space efficiency under different load and traffic distribution conditions. In particular, it consumes too much memory in sparse traffic scenarios. Furthermore, traditional methods are inefficient or have large errors when expanding the counting bit width.
The algorithm employs a bitmap-based variable-length block Sketch method, which uses bitmap-guided on-demand physical space allocation and hierarchical variable bit-width counters, combined with a composite state flag in-situ update mechanism, to achieve flexible management and on-demand allocation of the counting bit width, thereby reducing memory usage and storage redundancy in sparse flow scenarios.
It significantly reduces memory usage in sparse traffic scenarios, improves storage space utilization, supports flexible management of counting bit width, meets the real-time requirements of large-scale network measurement and traffic analysis, and has the ability to adapt to complex traffic environments.
Smart Images
Figure CN122420153A_ABST