移动自组织网络路由协议多是基于双向链路提出，而单向链路在战场环境下普遍存在，严重影响着网络性能。

Mobile AD hoc routing protocols are designed based on bidirectional links, but there are many unidirectional links in battlefield environment, and they have bad effect on the routing protocols.

youdao

如果找到的路由不是纯双向链路，则源节点还需要将RACK报文沿找到的回路路由循环一次，通过RACK的传播来通知中间节点建立起相应的路由。

If it is not a pure two-way path which includes some asymmetric links, the source needs to spread the RACK along the route and inform the route-related nodes to establish the corresponding route.

youdao

[据防务系统网站2011年3月28日报道]美国陆军将于今年春天在MQ-1C格雷伊格尔无人机上测试一种新型多传感器系统Triclops，其中包括双向数据链软件。

The Army will test a new multisensor system, containing bidirectional data link software, on the MQ-1C Gray Eagle unmanned aerial vehicle this spring.

youdao