Patent ID: 8134986

Claim:
A communication apparatus, comprising: a storage unit configured to store one or more sets of communication parameters, which comprises at least one of authentication method, encryption method and encryption key, and one or more configuration processing identifiers for identifying each of the one or more sets of communication parameters; an acquisition unit configured to acquire one or more configuration processing identifiers which identifies each of the one or more sets of communication parameters stored in another apparatus, from the another communication apparatus; and a determination unit configured to determine whether any one of the one or more configuration processing identifiers acquired by the acquisition unit agrees with any one of the one or more configuration processing identifiers stored in the storage unit; and a wireless communication unit configured to wirelessly communicate with the another apparatus, the wireless communication being performed by: 1) in a case where any one of the acquired one or more configuration processing identifiers is determined to agree with any one of the one or more configuration processing identifiers stored in the storage unit, designating the agreed configuration processing identifier to the another apparatus and using the set of communication parameters corresponding to the agreed configuration processing identifier, and 2) in a case where the acquired one or more configuration processing identifiers are determined not to agree with the one or more configuration processing identifiers stored in the storage unit, acquiring a set of communication parameters from the another apparatus and using the acquired set of the communication parameters.