In mm-wave networks, cell sizes are small due to high path and penetration losses. Mobiles need to frequently switch softly from one cell to another to preserve network connections and context. Each soft handover involves the mobile performing directional neighbor cell search, tracking cell beam, completing cell access request, and finally, context switching. The mobile must independently discover cell beams, derive timing information, and maintain beam alignment throughout the process to avoid packet loss and hard handover. We propose Silent tracker which enables a mobile to reliably manage handover events by maintaining an aligned beam until the successful handover completion. It is entirely in-band beam mechanism that does not need any side information. Experimental evaluations show that Silent Tracker maintains the mobile's receive beam aligned to the potential target base station's transmit beam till the successful conclusion of handover in three mobility scenarios: human walk, device rotation, and 20 mph vehicular speed.

中文翻译：

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Silent Tracker：用于毫米波网络软切换的带内波束管理

在毫米波网络中，由于高路径和穿透损耗，小区尺寸很小。移动设备需要频繁地从一个小区轻柔地切换到另一个小区，以保持网络连接和上下文。每次软切换都涉及移动台执行定向相邻小区搜索、跟踪小区波束、完成小区​​接入请求以及最后的上下文切换。移动台必须独立地发现小区波束，导出定时信息，并在整个过程中保持波束对齐，以避免丢包和硬切换。我们提出了 Silent tracker，它使移动设备能够通过保持对齐的波束直到成功完成切换来可靠地管理切换事件。它完全是带内波束机制，不需要任何辅助信息。实验评估表明 Silent Tracker 保持移动