Apparatus and method for adaptive channel quality feedback...

H - Electricity – 04 – L

Patent

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H04L 27/26 (2006.01)

Patent

CA 2614695

A subscriber station for use in a wireless network capable of communicating according to a multicarrier protocol. The subscriber station determines a total average signal level across N subbands, where each of subband comprises a plurality of subcarriers. The subscriber station also determines a first average signal level within a first subband. The subscriber station then transmits a channel quality indicator (CQI) feedback message to the wireless network. The CQI feedback message comprises a first data field indicating the total average signal level and a second data field indicating the first average signal level. The first data field may indicate the total average signal level as an absolute value and the second data field may indicate the first average signal level relative to the total average signal level.

L'invention concerne une station d'abonné utilisée dans un réseau sans fil capable de communiquer en fonction d'un protocole à porteuses multiples. La station d'abonné détermine un niveau de signal moyen total à travers des sous-bandes N, chaque sous-bande comportant plusieurs sous-porteuses. La station d'abonné détermine également un premier niveau de signal moyen dans une première sous-bande. Cette station d'abonné transmet ensuite un message de rétroaction d'indicateur de qualité de canal (CQI) au réseau sans fil. Le message de rétroaction de CQI comprend un premier champ de données indiquant le niveau de signal moyen total et un second champ de données indiquant le premier niveau de signal moyen. Le premier champ de données peut indiquer le niveau de signal moyen total en tant que valeur absolue et le second domaine de données peut indiquer le premier niveau de signal moyen par rapport au niveau de signal moyen total.

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