同时，鉴于无线链路上传输的不可靠和高误码率，详细介绍了跨层协议设计的相关内容。
Furthermore, the design of cross-layer protocol is described in detail due to the fallibility of wireless links.
通过对现有协议栈进行改进，加入跨层设计方案则有助于改善下一代无线系统性能。
Therefore the existing protocol stack improved by cross-layer design will be helpful to promote the performances of the next generation wireless system.
理论分析和仿真实验结果均表明，采用跨层设计思想在现有路由协议的基础上实现的服务发现协议是高效和可行的。
Quantitative analysis and simulation result also show that it's feasible and effective to implement service discovery protocol based on existed route protocols using cross-layer design methodology.
联合优化协议栈中各层的跨层设计技术能够显著提高网络的性能。
Cross layer design technique which jointly optimize several layers of protocol stack could improve network performance significantly.
其次，它使加入跨层设计后的网络协议栈每个层仍具有高内聚、低耦合的特征，从而保持了网络协议栈良好的软件架构。
Secondly, it keeps the low coupling and high cohesion virtue of layers in protocol stack after adding cross-layer design, so as to keep the OSI layering architecture.
其次，它使加入跨层设计后的网络协议栈每个层仍具有高内聚、低耦合的特征，从而保持了网络协议栈良好的软件架构。
Secondly, it keeps the low coupling and high cohesion virtue of layers in protocol stack after adding cross-layer design, so as to keep the OSI layering architecture.
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