Sequence allocation method in mobile communication system

H - Electricity – 04 – W

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H04W 28/20 (2009.01)

Patent

CA 2664913

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method divides R x M sequences specified by a ZC sequence number r(r = 1 to R) and a cyclic shift sequence number m (m = 1 to M) into a plurality of sequence groups X (X = 1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R = 9 and M = 6, the number of sequence is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

L'invention concerne un procédé d'allocation de séquence pouvant réduire l'interférence inter cellules d'un signal de référence lorsqu'une séquence ZC est utilisée comme signal de référence dans un système de communication mobile. Dans l'allocation de séquence, le procédé divise R x M séquences spécifiées par un nombre de séquences ZC r (r = 1 à R) et un nombre de séquences de décalage cyclique m (m = 1 à M) en une pluralité de groupes de séquences X (X = 1 à R) conformément à la largeur de bande de transmission du signal de référence, de telle sorte que la séquence ZC est allouée à chaque cellule dans chaque unité de groupe de séquences. Lorsqu'il est supposé que R = 9 et M = 6, le nombre de séquences est 54. Chacun des groupes de séquences est formé par deux séquences. En conséquence, le nombre de groupes de séquences est 27. Les 27 types de groupes de séquences sont alloués à chaque cellule.

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