Traffic shaping circuit, terminal device and network node

Details Traffic shaping circuit, terminal device and network node Traffic shaping circuit, terminal device and network node

2008-02-04

2011-12-06

Ngo, Ricky (Department: 2464)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

08072885

ABSTRACT:
In order to allow priority transfer (fluctuation) over VLL packets while keeping each contracted bandwidth constantly, a leaky bucket model is expanded to have a threshold1509for permitting transmission of a packet (e.g. a WFQ packet) other than an LLQ packet and a threshold1501(larger than the threshold1509) for permitting transmission of the LLQ packet (two-threshold leaky bucket model). In this manner, even when a WFQ cannot be transmitted, an LLQ can be transmitted with priority. In addition, while the total bandwidth of the WFQ and LLQ, i.e. the bandwidth of the VLL contains fluctuation, the contracted bandwidth can be complied with. The circuit of the model is provided in LLQ and WFQ transmission appointed time calculating circuits so as to calculate respective transmission appointed times so that an LLQ/WFQ is selected and a packet is selected based on the times considering priority.

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“Traffic Management Specification”, version 4.0, The ATM Forum, Technical Committee, Apr. 1996.

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