Method and apparatus for scheduling in a wireless network

Details Method and apparatus for scheduling in a wireless network Method and apparatus for scheduling in a wireless network

H - Electricity

04

W

H04W 72/12 (2009.01)

Patent

CA 2569414

Techniques for scheduling flows and links for transmission are described. Each link is an oriented source-destination pair and carries one or more flows. Each flow may be associated with throughput, delay, feedback (e.g., acknowledgments (ACKs)) and/or other requirements. A serving interval is determined for each flow based on the requirements for the flow. A serving interval is determined for each link based on the serving intervals for all of the flows sent on the link. Each link is scheduled for transmission at least once in each serving interval, if system resources are available, to ensure that the requirements for all flows sent on the link are met. The links are also scheduled in a manner to facilitate closed loop rate control. The links are further scheduled such that ACKs for one or more layers in a protocol stack are sent at sufficiently fast rates.

L'invention porte sur des techniques de programmation de flux et de liaisons à transmettre. Chaque liaison est une paire orientée source-destination et transporte un ou plusieurs flux. Chaque flux peut être associé à un débit, un retard, une rétroaction (par exemple des accusés de réception) et/ou d'autres exigences. Un intervalle de protection est déterminé pour chaque flux en fonction des exigences du flux. Un intervalle de protection est déterminé pour chaque liaison en fonction des intervalles de protection pour tous les flux envoyés sur la liaison. Chaque liaison est programmée en vue de la transmission au moins une fois dans chaque intervalle de protection, si les ressources du système sont disponibles, afin de s'assurer que les exigences de tous les flux envoyés sur la liaison sont remplies. Les liaisons sont également programmées de manière que les AR d'une ou plusieurs couches dans une pile de protocole soient envoyées à des vitesses suffisamment rapides.

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