Patent ID: 9282522
Filing Date: 2016-03-08
CPC Classification: H04L,H04W

Claim Text:
1. A communication apparatus comprising: a wireless interface unit that performs transmission and reception of a message with outside of the communication apparatus; an operation-mode storing unit that stores an information related to operation mode of the communication apparatus, the operation mode including publisher mode and subscriber mode; an identification-information storing unit that stores a first identifier indicating that the communication apparatus belongs to a first group; a message processing unit that generates a message that is transmitted by the wireless interface unit, and analyzes a message that is received by the wireless interface unit; a transmission-power decision unit that decides transmission power when the wireless interface unit transmits a message; and a nonvolatile memory, wherein when the communication apparatus is determined to be a publisher based on a mode stored in the operation-mode storing unit, the message processing unit generates a transmission message including the first identifier to be output by the wireless interface unit to outside of the communication apparatus using first transmission power, when the communication apparatus is determined to be a subscriber based on a mode stored in the operation-mode storing unit, the message processing unit analyzes whether the reception message received by the wireless interface unit includes the first identifier, and stores data included in the reception message when the first identifier is included in the reception message, and does not store data included in the message when it is determined that the first identifier is not included in the reception message, and when the communication apparatus is a subscriber and when at least a part of the reception message cannot be received, a repair message for requesting retransmission of at least a part of the reception message is output from the wireless interface unit to outside of the communication apparatus using second transmission power, and when there is no response from outside of the communication apparatus to the repair message, the repair message is output from the wireless interface unit to outside of the communication apparatus using third transmission power that is larger than the second transmission power.