Method and arrangement for upstream timeslot assignment, and...

H - Electricity – 04 – J

Patent

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Details

H04J 3/16 (2006.01) H04L 5/22 (2006.01) H04L 12/403 (2006.01) H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2249735

To assign upstream timeslots to network terminals (ANT1, ANT2, ANT3, ANT4) in a communication network wherein a common link (L) is shared in a time multiplexed way in the upstream direction from the network terminals (ANT1, ANT2, ANT3, ANT4) towards the main station (LIM), the main station (LIM) keeps track of at least one grant table (T1, T2) and at least one exceptional grant queue (Q1, Q2). The grant table (T1, T2) is scanned cyclically and the main station (LIM) downstream broadcasts a grant message for each entry of this grant table (T1, T2). This grant message assigns an upstream timeslot to the network terminal (ANT1) whose identifier (ID1) is memorised in the scanned tableentry. If the scanned entry is empty, the main station (LIM) assigns an upstreamtimeslot to the network terminal (ANT2) whose identifier (ID2) is read from a non-empty exceptional grant queue (Q1, Q2).

Afin d'affecter des créneaux temporels d'amont à des terminaux (ANT1, ANT2, ANT3, ANT4) d'un réseau de communication dans lequel une liaison commune (L) est partagée en mode de multiplexage temporel vers l'amont à partir des terminaux de réseau (ANT1, ANT2, ANT3, ANT4) en direction de la station principale (LIM), cette dernière (LIM) effectue un suivi des données d'au moins un tableau d'attribution (T1, T2) et d'au moins une file d'attribution exceptionnelle (Q1, Q2). Le tableau d'attribution (T1, T2) est balayé de façon cyclique et la station principale (LIM) diffuse en aval un message d'attribution pour chaque entrée de ce tableau d'attribution (T1, T2). Ce message affecte un créneau temporel d'amont au terminal de réseau (ANT1) dont l'identificateur (ID1) est mémorisé dans l'entrée de tableau balayée. Si l'entrée balayée est vide, la station principale (LIM) affecte un créneau temporel d'amont au terminal de réseau (ANT2) dont l'identificateur (ID2) est extrait d'une file d'attribution exceptionnelle non vide (Q1, Q2).

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