Patent ID: 7903622

Claim:
A network system comprising a first communication device, a second communication device communicating with the first communication device, and a protocol group used for the communication, wherein: the protocol group further comprises a first direction integrated circuit (IC) operation information transfer means for transferring IC operation information related to an operation of a first information processing IC of the first communication device from the first communication device to the second communication device, and a second direction IC operation information transfer means for transferring the IC operation information from the second communication device to the first communication device, wherein the IC operation information is quality information related to a communication quality required for the communication; the first communication device is configured to create and transfer the IC operation information to the second communication device using the first direction IC operation information transfer means; the second communication device is configured acknowledge a whole or a part of the transferred IC operation information, and to transfer the acknowledged IC operation information to the first communication device using the second direction IC operation information transfer means; and the first communication device further configured to adjust a driving frequency and/or a supply voltage of the first information processing IC according to the acknowledged IC operation information.