本文详细讲述了如何在NS中添加一个新的MAC协议，包含NS扩展一个新协议的全过程，简单实用，对于其他协议的添加也有很好的借鉴作用。-This article describes how to add a new NS MAC protocol, including the whole process of the NS extension of a new agreement, simple and practical, is also a good reference for other protocols add.