作为一种新型传输技术，选择协作技术应用于无线传感网（WSN），能够有效发挥多用户分集的优势。但多数选择协作方法，并未针对WSN的特征进行专门设计。为了满足WSN对协作传输的低复杂度、低能耗等需求，本项目将对选择协作技术在WSN中的适配优化方法进行深入研究，主要内容包括：1）针对WSN的低复杂度需求，提出基于反馈的轻量级选择协作方法，设计均衡型中继选择策略；2）针对WSN的“事件驱动”特点，提出支持节点休眠的基于事件关联的低能耗选择协作方法与中继选择方案；3）针对以小数据包传输为主的WSN网络，提出基于包聚合的选择协作方法，研究和分析中继转发和包聚合策略，设计高效协作聚合调度方法；4）针对协作通信实验平台匮乏的问题，构建基于WSN的选择协作实验平台，并验证所提方法。本项目把协作通信与WSN密切结合起来，将完善选择协作技术的基本方法，有助于该技术在WSN中的应用和发展。

As a novel transmission technology, selection cooperation is suitable for applying in wireless sensor networks (WSNs) for its advantage of multi-user diversity. However, most selection cooperation schemes were not designed for WSN. Thus, with the purpose of meeting the cooperative transmission requirements of WSN, such as low complexity, energy efficiency, and so on, this project focuses on the selection cooperation schemes optimized for WSN. It consists of the following four parts: 1) The lightweight selection cooperation protocol with feedback and best relay selection methods for relay balance by considering the requirement of low complexity; 2) The low power selection cooperation scheme and best relay election method supporting sleep nodes based on event-driven characteristic and sensor relationship of WSN; 3) The energy-efficient selection cooperation scheme and relaying retransmission strategy using packet aggregation for WSN with small packets and high-efficient cooperative aggregation scheduling methods; 4) The selection cooperation experimental platform based on WSN to address the issue of test bed shortage for cooperative communication and verify the performances of the proposed cooperative schemes. The work in this project combines the cooperative communications and the WSN. It enhances the basic schemes and contributes to the application and development of selection cooperation in WSN.