Method and apparatus for a cdma random access communication...

H - Electricity – 04 – W

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H04W 74/08 (2009.01)

Patent

CA 2341561

In a system in which multiple remote units compete (104) for limited communication resources, a remote unit (104A) accesses the system by randomly selecting a first sequence from a set of predetermined sequences. The remote unit (140A) transmits a data bit stream modulated with the first sequence beginning at one of a set of recurring admission boundaries. If the remote unit (104A) determines that the data bit stream has not been successfully received at a hub station (100), the remote unit (104A) randomly selects a second sequence from the set of predetermined sequences. The remote unit (104A) transmits the data bit stream modulated with the second sequence beginning at one of the set of recurring admission boundaries.

Dans un système dans lequel des unités distantes multiples entrent en concurrence (104) du fait que les ressources de communication sont limitées, une unité distante (104A) accède au système par une sélection aléatoire d'une première séquence dans un ensemble de séquences prédéterminées. L'unité distante (140A) transmet un train binaire modulé avec la première séquence commençant à une limite d'un ensemble de limites d'admission périodique. Si l'unité distante (104A) détermine que le train binaire n'a pas été reçu pleinement au niveau d'une station pivot (100), l'unité distante (104A) sélectionne de façon aléatoire une seconde séquence dans l'ensemble de séquences prédéterminées. L'unité distante (104A) transmet le train binaire modulé avec la seconde séquence commençant à une limite de l'ensemble de limites d'admission périodique.

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