Asymmetric bandwidth allocation
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsSilvia Restivo, Patrizia Testa
Life of this patent
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Abstract
A method of determining the position of the split between uplink and downlink bandwidth, in a point of multipoint radio access system with time division duplex scheme comprising a certain number of user terminals and a base station has been disclosed, wherein there are at least two quality of service classes, a first class for guaranteed services (RT) and a second class for not-guaranteed/best effort services (BE). The MAC layer evaluates and controls a further movement of the split—as that initially determined by a Call Admission Control (CAC)—according to the behavior of uplink and downlink not-guaranteed/best effort queues observed during a certain observation period.
Claims6
A method of determining and effectuating split positions between uplink and downlink bandwidth in a point to multipoint radio access system, wherein the system utilizes a time division duplex scheme on a frame by frame basis and with at least two quality of service classes, a first class for guaranteed services (RT) and a second class of best effort services (BE);
- wherein, within every frame a portion of bandwidth is devoted to uplink traffic and another portion to downlink traffic, and wherein a split between uplink and downlink bandwidth is controlled by a call admission controller (CAC), and wherein scheduling of traffic is performed according to a scheduling policy carried out by a medium access control (MAC) layer, said method comprising the steps of:
- said medium access control (MAC) layer monitoring the status of best effort (BE) uplink and downlink queues and averaging them during an observation period;
- for every observation period, said medium access control (MAC) layer evaluating a further movement of the split;
- and
- according to the evaluated split position, said medium access control (MAC) layer allocating resources frame by frame to user terminals and to a base station using its scheduling policy.
Dependencies are inferred from the claim text.