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Roaming enables customers to automatically access their wireless services when traveling outside the geographical coverage area of their home network and can occur in many forms. The purpose of this paper is to: describe roaming and the various models used to provide roaming services; and introduce some of the concepts and terminology adopted for WiMAXTM roaming. It should be noted that this paper is not a technical guidelines or a specification. It is stressed that there may be other roaming scenarios not addressed in this paper and that readers are at liberty to choose the approach or approaches which best meet their individual needs whether or not described in this paper.
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