×

Multiple-access communication system capable of measuring and guaranteeing a service quality supplied for each service permitted to subscriber stations

  • US 6,434,164 B1
  • Filed: 05/07/1999
  • Issued: 08/13/2002
  • Est. Priority Date: 05/08/1998
  • Status: Active Grant
First Claim
Patent Images

1. A multiple-access communication system comprising;

  • a center station;

    a subscriber station;

    a broadcasting downstream channel; and

    a multiple-access type upstream channel from the subscriber station to the center station, in which the center station permits the subscriber station to use guaranteed services of different qualities and assigns identifiers for each service to the subscriber station, and the subscriber station having an upstream data to send transmits reservation information made up of the identifier and an upstream bandwidth to request in a bandwidth permitted by the center station, and the center station allocates upstream bandwidth to the subscriber based on the reservation information received from the subscriber station, wherein said center station, upon receiving said reservation information from said subscriber station, measures a service quality being supplied with regard to said identifier contained in said reservation information and compares a measured value with a guaranteed value of a previously assigned service quality, and if the measured value is below the guaranteed value, the center station immediately accepts said reservation information and allocates upstream bandwidth, and if the measured value is above the guaranteed value, the center station accepts a reservation information of other subscriber stations prior to accepting said reservation information, so as to prevent degradation of service quality to the other subscriber stations and reassure each quality of service to all said subscribers.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×