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Method to determine a scheduled rate value to be used in a policing algorithm, and related policing device

  • US 6,072,989 A
  • Filed: 10/23/1997
  • Issued: 06/06/2000
  • Est. Priority Date: 10/23/1996
  • Status: Expired due to Term
First Claim
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1. A method to determine in a policing device (POL) a scheduled rate value (R-- first, R-- last) to be used at an associated scheduled time (T-- first, T-- last) on said policing device (POL) to police cell traffic in a connection between an origin node (S, VS1) and a destination node (D, VD2) of a cell switching network, wherein a cell transmission rate of said origin node (S, VS1) is controlled by said origin node (S, VS1) upon receipt and interpretation of rate control information (CI, NI, ER) contained in a backward resource management cell (BRM) that is backward routed via said policing device (POL) towards said origin node (S, VS1), said method comprising the step of calculating said scheduled rate value (R-- first, R-- last) from said rate control information (CI, NI, ER) in said backward resource management cell (BRM), and from information deduced from a forward resource management cell (FRM), said forward resource management cell (FRM) being generated by said origin node (S, VS1) and routed forward towards said destination node (D, VD2) via said policing device (POL),characterized in that said information deduced from said forward resource management cell (FRM) indicates that said cell transmission rate has to decrease to an initial cell rate (ICR) if a certain time period has elapsed between receipt of said forward resource management cell (FRM) and a previous forward resource management cell.

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