Title:
【発明の名称】パケット交換通信ネットワークのためのアクセス制御機構
Document Type and Number:
Japanese Patent JP2002532037
Kind Code:
A
Abstract:
In a point-to-multipoint link traffic is transmitted in packets across the shared medium. Access to the medium is controlled by permits sent by a central node to multipoint nodes in response to a queue record of the number of packets awaiting transmission at the multipoint nodes. When circuit emulated traffic, or traffic with tight delay and delay variation requirements, is to be sent across the link, permits are sent by the central node unsolicited at regular intervals in accordance with information stored in a scheduler. The scheduler may be a single or several circular memories comprising cells representing time slots on the link. The cells contain scheduling information corresponding to one or more multipoint nodes. The central node consults the scheduler to determine if a permit is scheduled. If no permit is scheduled the time slot may be allocated to an unscheduled service on the basis of a queue record.
Inventors:
Randberg, Christel
Orgs, Lars
Orgs, Lars
Application Number:
JP2000586129A
Publication Date:
September 24, 2002
Filing Date:
December 01, 1999
Export Citation:
Assignee:
Telefon Acty Boraget Elm Ericson (Pubble)
International Classes:
H04J3/17; H04L47/56; H04L47/80; (IPC1-7): H04L12/56; H04J3/17
Attorney, Agent or Firm:
Akira Asamura (3 outside)