Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Patent
1997-03-20
2000-06-27
Pham, Chi H.
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
370252, 370418, H04L 1256, H04L 1254
Patent
active
060815051
ABSTRACT:
A system and method for managing elements of information at a network node received from a user access node. An access node includes a user
etwork interface (UNI), and a core network node includes a cell filtering unit. The UNI includes a measuring unit, which measures the actual momentary bit rate of a connection between the UNI and the core node, and a priority level computing unit, which computes the priority level of each cell using the measured bit rate and an established nominal bit rate (NBR). NBR represents an expected, but not guaranteed, bit rate associated with a particular user or connection. The connection may be a real-time or a non-real-time connection. A scheduling unit of a node accepts or discards an arriving cell based on the occupancy of a real-time buffer and a non-real-time buffer provided at the node. Cells accepted by the scheduling unit are transferred to either the real-time buffer or the non-real-time buffer depending on cell type, and read out of the buffers with preference given to cells in the real-time buffer. A UNI may include two measuring units for measuring a short-term and a long-term bit rate of the connection, respectively. Packets of cells may be processed by the scheduling unit, such that if the first cell of the packet is discarded by the node, then all subsequent cells of the packet are discarded. If the first cell of a packet is accepted, then the priority of other cells of the packet may be increased.
REFERENCES:
patent: 5359593 (1994-10-01), Derby et al.
patent: 5463620 (1995-10-01), Sriram
patent: 5557608 (1996-09-01), Calvignac et al.
patent: 5600641 (1997-02-01), Duault et al.
patent: 5790522 (1998-08-01), Fichou et al.
patent: 5818499 (1996-07-01), Unekanwa
patent: 5818818 (1998-10-01), Soumiya et al.
patent: 5828653 (1998-10-01), Goss
patent: 5838922 (1998-11-01), Galand et al.
Technical Committee, Traffic Management Specification Version 4.0, af-tm-00561.000, Apr. 1996, pp. 1-59.
Integrated Services Digital Network (ISDN) Overall Network Aspects and Functions, Traffic Control and Congestion Control in B-ISDN, ITU-T Recommendation 1.371, Mar. 1993, pp. 1-27.
What are the meaning of CBR, VBR, ABR, UBR?, Maintained by Carl Symborski, Last Changed Aug. 20, 1996, Pp. 1-2 and 1-5.
ATM Service Categories: The Benefits to the User, Editor: Libio Lambaarelli, CSELT' Torino, Italy, Pp. 1-10.
An Overview of ATM Technology, Gary Kessler, Jan. 1995, Pp. 1-10.
ATM--The New Technology for Tomorrow's B-ISDN, Engui Yao, Dec. 1994, Pp. 1-23.
Nguyen Steven
Nokia Telecommunications OY
Pham Chi H.
LandOfFree
Cell scheduling system and method for networks nodes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cell scheduling system and method for networks nodes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cell scheduling system and method for networks nodes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1789991