Patent ID: 9106608
Filing Date: 2015-08-11
Classification: H04L

Abstract:
1. A communication device comprising: an input and output unit configured to receive a first instruction relating to activation of service; a communication unit configured to communicate with a plurality of client devices; and a controller configured to, when the input and output unit receives the first instruction, control the communication unit to transmit to the plurality of client devices, first data indicating the activation of service, the controller being configured to, in a first case that the first instruction includes no identifiers of the plurality of client devices, control the communication unit to transmit to every one of the plurality of client devices which transmits a connection request to the communication device in response to the first data, a negative response indicating non-acknowledgment of the connection request, wherein when a communication connection established state is defined as a state that the connection request is sent and a positive response corresponding to the connection request is received; a server device is defined as a device which provides service to the client devices; the client device is defined as a device which utilize the service provided by the server device; and a communication protocol is defined as a protocol which is defined that only the client device is capable of sending the connection request, the communication protocol being in a layer higher than that of TCP protocol and lower than application layer according to OSI reference model, the communication device operates according to the communication protocol.