同时设计了一套中继通讯协议，使终端具有中继功能，扩充了集中器的管理能力，降低了安装和维护费用。
A set of relay protocols are designed to make the system have relay function, which spread the work range of concentrator and reduce the costs of installation and maintenance.
课题重点研究了计费终端、低压电力线载波模块和数据管理中心的设计，并制定了相关的通信协议。
The thesis investigates the design of the data center, the module of low power line carrier and the data administration center, the thesis also constitutes the correlative communication protocols.
课题重点研究了计费终端、低压电力线载波模块和数据管理中心的设计，并制定了相关的通信协议。
The thesis investigates the design of the data center, the module of low power line carrier and the data administration center, the thesis also constitutes the correlative communication protocols.
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