According to the embodiments of the present invention, in a system to which the E UTRA is applied, a base station apparatus, a user apparatus, and a method of allocating a reference signal sequence are provided that make it possible to reduce {HEAD ~ sequence collision} among {TAIL ~ cells} without increasing signaling reported by the base station apparatus 
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According to the embodiments of the present invention , in a system to which the E UTRA is applied , a base station apparatus , a user apparatus , and a method of allocating a reference signal sequence are provided that make it possible to reduce { HEAD ~ sequence collision } among { TAIL ~ cells } without increasing signaling reported by the base station apparatus
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