Bluetooth Low Energy Service Oriented Architecture   best wireless earbuds for android phone calls

A further abstraction on top of the client-server architecture is the service-oriented paradigm. This is a model for organizing information in a server into services. The service can be discovered, interacted with, or used with known semantics. This means that the service has deterministic behavior. When given the same conditions, the same result will always be produced. www.bjbjaudio.com

This paradigm is the basis for the most successful Internet systems, SOAPRESTCOBRARPC web services etc. To better illustrate this. One way is to combine it with real world examples. Assuming there is a package that needs to be delivered to another company as soon as possible, the first thing you might do is call the courier company to arrange a pickup. Then pay the service fee. The point is, you always know what's coming next, and couriers always follow a default set of behaviors; no matter what day you give them a package, they do exactly the same thing - deliver it to its destination in a timely manner. This service has predetermined behavior and known semantics and produces predictable results. www.bjbjaudio.com 

An interesting aspect of the above example is that you are dealing with two different people at the courier company: the person who answers the phone and accepts business requests, and the courier driver who picks up the package. Also, you may not realize that there is actually a person who handles financial accounts. The sub-services provided by the three people are combined with each other to form the main service of the express company. These subservices are also generic, and they can be used by many different types of companies. For example, financial transaction processing can be applied to companies in almost the same way. Similarly, the service of picking up goods in one place and unloading them in another place by telephone can also be applied to taxi companies. It's all going to work. Each session must follow a set of rules and conventions. www.bjbjaudio.com

formal contract
A service is considered a service because it provides a formal description of what it does and how it works. For example, the driver of a courier company drives a company vehicle in company uniform and greets customers happily. He will drive the vehicle between locations quickly and safely, delivering packages intact. Any breach of these rules will be considered a breach of the contract between the customer and the courier company. Therefore, most courier companies also require customers to agree to this formal contract before going to pick up the package. www.bjbjaudio.com

One of the benefits of formal contracts is that instances of one service can easily be replaced by instances of another service. This is possible as long as the two instances of the service have the same functionality and behavior. For example, a financial person leaves the company. It should be easy for companies to find a replacement who knows the same accounting rules. In Bluetooth Low Energy, these formal contracts are in the service specification and adopted by the Bluetooth SIG. These specifications also have corresponding test specifications to ensure the effectiveness of the implementation behavior. www.bjbjaudio.com