Analysis of WebSockets as the New Age Protocol for Remote Robot Tele-operation

A Brief Review of Messaging Protocol Standards for Internet of Things (IoT)

“…It is full-duplex communication between a client and a remote server that provides security just like the security model used in a web browser. WebSocket works in TCP, and the applications that use browsers with that do not need to interact and communicate with a remote host [11].…”

“…The client requests to upgrade the connection to WebSocket protocol. An example of a request to establish a WebSocket connection is illustrated by Wang et al (2013) as [11]:…”

“…As shown in Figure 6, when the connection is made, both sides can share messages anytime with any requests or responses. When the server accepts and agrees to advance the connection, it sends a response like the one below which is taken from Wang et al (2013) [5,11]. HTTP/1.1 101 Switching Protocols Upgrade: websocket Connection: Upgrade Sec-WebSocket-Accept: fYoqiH14DgI+5 ylEMw M2sOLzOi0 Date: Wed, 12 Jun 2013 01:33:37 GMT Server: Kaazing Gateway When the server does not match with WebSocket, they still can understand the handshake because of the HTTP header and reply to it with a negative response.…”

“…WebSocket connection can be coded or Decoded using Transport Layer Security (TLS) precisely in the same way as HTTP connections. They answer to the uniform resource identifier (URL), address the same ports of http/https (80/443), and make the firewalls and the proxies easy to handle [11].…”

“…• on open: connection opened • on message: message received • on error: error occurred • on close: connection closed API is simple to use, and it can hold and support full functionality. Whereas API protocol supports extra functions such as sending and handling frames separately, it is an optional in the standardized WebSocket API [4,11].…”