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Flowshark is a tool designed to analyze raw signaling in PCAP format, specifically tailored for diagnosing the causes of VoLTE/VoNR call failures. Launched in 2016, the same year that China Mobile commercialized its VoLTE service, Flowshark achieved over 13,000 annual downloads. Its user base includes engineers from the three major carriers, the five major equipment vendors, provincial research institutes and design institutes, as well as hundreds of third-party optimization service companies. In 2021, Flowshark was rebranded as CloudFlowshark and transformed into a SaaS version. CloudFlowshark ceased operations and was taken offline in January 2025.
DeepOcean is a signaling monitoring system that was initially developed and commercialized by Motorola in 2005. It was later taken over by Nokia in 2011 for continued operation. At its peak, the project generated annual revenues of several hundred million. It was widely used in Nokia's original factory technical service projects across various provinces in China.
This project is a signaling analysis agent based on large models and a knowledge base. It uses large models to call the MCP tool to analyze raw signaling in PCAP format, obtaining the call process. It then compares this with the local case knowledge base to find the most similar reference case and ultimately outputs the reason for call failure.
This project involves fine-tuning the Qwen3-8B-Instruct large model from Qianwen through a fine-tuning training process. The result is a large model that can provide the reason for call failure based on the signaling call process through a conversational interface.
经过十余天的不懈努力，终于完成了针对信令诊断的模型微调训练。此次微调使用了 Qwen3-8B-Instruct 模型，训练数据集源自云流鲨案例库
阅读全文『深海 · 流鲨智能体』的实现、优化与总结
阅读全文完整介绍了方案实现，包括运行环境、使用的各组件版本、系统提示词、实际运行效果等。
阅读全文使用 IMA 加入流鲨案例库（加入方法戳这里），就可以通过提问来分析信令，进而判断呼叫失败的原因。由于 IMA 无法直接查看真实的 pcap 信令，其回答是基于案例库匹配得出的。这种语义匹配方式正是大语言模型的专长，但前提是案例描述和提问内容都足够准确、完整。
阅读全文使用腾讯 IMA 制作的 3GPP-R18 知识库，有了它，任何人都可以随时随地跟规范直接对话提问了。
阅读全文前文总结了六种原因导致单通，本期聊聊系统间互操作时出现的"单通"。
阅读全文听到 "您拨打的电话正在通话中"时，大家都能判断是真占线、还是对方现在不方便或不愿意接。当看信令时遇到 "486 User Busy"，情况要复杂得多，这时候被叫除了可能正在通话中，还可能正在自动屏蔽中、手工置忙中、摘机后悔中、正在起呼中、正在注销中、甚至是自己占了自己的线！今天咱就针对这几种情况拿真实码流做个展示。
阅读全文本文内容来自《VoNR 端到端分析》技术培训资料，PPT文档全文包括16个话题，共计256页，拆分为五篇分享，另有两篇番外。
阅读全文码流标注项目是我们在2017年完成的一个众筹项目，是基于真实码流，邀请专家为信令流程中的关键信令提供详细讲解的项目，特邀专家是著名的璇璇老师。最初的码流标注采用了流鲨 FCAP 文件格式，这次我们把内容从 FCAP 文件中提取出来，整理成了 PDF 文档。
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