The Rate Control Protocol (RCP) is a congestion control protocol that relies on explicit feedback from routers. RCP estimates the flow rate using two forms of feedback: rate mismatch and queue size. However, it remains an open design question whether queue size feedback in RCP is useful, given the presence of rate mismatch. The model we consider has RCP flows operating over a single bottleneck, with heterogeneous time delays. We first derive a sufficient condition for global stability, and then highlight how this condition favors the design choice of having only rate mismatch in the protocol definition.

中文翻译：

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速率控制协议 (RCP) 的全局稳定性和对协议设计的一些影响

速率控制协议 (RCP) 是一种拥塞控制协议，它依赖于路由器的显式反馈。RCP 使用两种形式的反馈来估计流量：速率不匹配和队列大小。然而，考虑到速率不匹配的存在，RCP 中的队列大小反馈是否有用仍然是一个开放的设计问题。我们考虑的模型使 RCP 流在单个瓶颈上运行，具有异构时间延迟。我们首先推导出全局稳定性的充分条件，然后强调该条件如何有利于在协议定义中仅具有速率不匹配的设计选择。