This specification describes two levels of interfaces: • A lower DCPS (Data-Centric Publish-Subscribe) level that is targeted towards the efficient delivery of the proper information to the proper recipients. • An optional higher DLRL (Data Local Re
Preface xiii List of abbreviations xv A guide to the book xxiii 1 Introduction 1 1.1 The vision of Ambient Intelligence 1 1.2 Application examples 3 1.3 Types of applications 6 1.4 Challenges for WSNs 7 1.4.1 Characteristic requirements 7 1.4.2 Requ
The miniaturization of hardware components has lead to the development of Wireless Sensor Networks (WSN) and networked-applications over them. Meanwhile, middleware systems have also been proposed in order to both facilitating the development of the
MQ Telemetry Transport (MQTT) is a lightweight broker-based publish/subscribe messaging protocol designed to be open, simple, lightweight and easy to implement.
转载请注明出处，此系列的例子都是本人想了很久认为适合教学容易理解的，若有更好的例子也请发邮件给我一起研究，nj.lg#163.com Observer (观察者模式) 又叫做发布/订阅（Publish/Subscribe）模式。 当一个对象的改变同时会影响其他对象的行为的时候，可以使用此设计模式。 l 主题对象 ：一个需要被关注的主题对象，这个主题对象改变会影响其他对象的行为 l 订阅对象：当主题对象发生改变，订阅对象需要相应处理。 l 观察者对象：抽象出观察者对象，负责管理需要被通知的订阅对
