Communication Apparatus, Processing Method Thereof, Non-Transitory Computer-Readable Storage Medium, and Communication System

1. A communication apparatus comprising: an input unit configured to input an instruction for a start of a first setting process complying with a predetermined method for setting a wireless communication parameter; a reception unit configured to receive, from another communication apparatus, a certain signal indicating that said another communication apparatus has started a second setting process complying with the predetermined method for setting a wireless communication parameter; and an output unit configured to output identification information to be used in the first setting process if a start of the first setting process is instructed, wherein, if the reception unit receives, from said another communication apparatus, the certain signal before the output unit outputs the identification information, the communication apparatus does not execute the first setting process together with said another communication apparatus, and wherein, if the reception unit receives, from said another communication apparatus, which does not send the certain signal before the output unit outputs the identification information, the certain signal after the output unit outputs the identification information, the communication apparatus executes the first setting process together with said another communication apparatus.

2. The communication apparatus according to claim 1 , wherein the certain signal is included in a probe response or beacon.

3. The apparatus according to claim 2 , wherein the certain signal is included in a beacon signal compliant with IEEE 802.11 standard series.

4. The communication apparatus according to claim 1 , further comprising a generating unit configured to randomly generate the identification information to be output by the output unit.

5. The apparatus according to claim 1 , wherein the output unit outputs the identification information to a displaying unit.

6. The apparatus according to claim 1 , wherein the certain signal is included in a probe response signal compliant with IEEE 802.11 standard series.

7. The apparatus according to claim 1 , wherein the identification information is a Personal Information Number (PIN) code.

8. The apparatus according to claim 1 , wherein the predetermined method is compliant with Wi-Fi Protected Service Setup (WPS).

9. The apparatus according to claim 1 , wherein the wireless communication parameter includes at least one of an encryption method, an encryption key, an authentication method, or an authentication key.

10. The apparatus according to claim 1 , wherein the reception unit starts the receiving in response to inputting of the instruction.

11. The apparatus according to claim 1 , wherein the reception unit executes the receiving before and after the output unit outputs the identification information.

12. A processing method of a communication apparatus, comprising: inputting an instruction for a start of a first setting process complying with a predetermined method for setting a wireless communication parameter; receiving, from another communication apparatus, a certain signal indicating that said another communication apparatus has started a second setting process complying with the predetermined method for setting a wireless communication parameter; and outputting identification information to be used in the first setting process if a start of the first setting process is instructed, wherein, if the certain signal is received from said another communication apparatus before the identification information is output, the communication apparatus does not execute the first setting process together with said another communication apparatus, and wherein, if the certain signal is received from said another communication apparatus, which does not send the certain signal before the identification information is output, after the identification information is output, the communication apparatus executes the first setting process together with said another communication apparatus.

13. A non-transitory computer-readable storage medium storing a computer program for causing a computer, which is incorporated in a communication apparatus, to function as: an input unit configured to input an instruction for a start of a first setting process complying with a predetermined method for setting a wireless communication parameter; a reception unit configured to receive, from another communication apparatus, a certain signal indicating that said another communication apparatus has started a second setting process complying with the predetermined method for setting a wireless communication parameter; and an output unit configured to output identification information to be used in the first setting process if a start of the first setting process is instructed, wherein, if the reception unit receives, from said another communication apparatus, the certain signal before the output unit outputs the identification information, the communication apparatus does not execute the first setting process together with said another communication apparatus, and wherein, if the reception unit receives, from said another communication apparatus which does not send the certain signal before the output unit outputs the identification information, the certain signal after the output unit output the identification information, the communication apparatus executes the first setting process together with said another communication apparatus.