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---
title: "BBR"
type: concept
tags: [networking, tcp, performance]
sources: []
last_updated: 2026-04-16
---
## Definition
BBR Bottleneck Bandwidth and Round-trip propagation time是 Google 开发的 TCP 拥塞控制算法,通过实时探测带宽和延迟调整发送速率,提升网络传输性能。
## Core Attributes
- 开发者Google
- 类型TCP 拥塞控制算法
- 启用方式3X-UI 面板选项 23
- 作用:提升跨境网络传输速度
## Mechanism
BBR 通过两个核心指标调整发送行为:
1. Bottleneck Bandwidth瓶颈带宽
2. Round-trip propagation time往返传播时间
相比传统 Cubic 算法BBR 在高延迟高带宽网络中表现更优。
## Connections
- [[BBR]] ← enabled_by ← [[3X-UI]]