公开(公告)号：EP0962117A1

公开(公告)日：1999-12-08

申请号：EP98905521.0

申请日：1998-02-19

Applicant: NORTEL NETWORKS CORPORATION

Inventor： BRUECKHEIMER, Simon, Daniel ,  STACEY, David, John

IPC: H04Q11 ,  H04L12

CPC classification number: H04Q11/0478 ,  H04L2012/5638 ,  H04L2012/5656 ,  H04L2012/5672 ,  H04L2012/5681

Abstract: In an adaptation layer switching network, functional partitioning is provided by providing a separation between service specific sublayers (SSCS), common part sublayers (CPS) and transport convergence. This enables the support of a range of SSCS functions via a common set of CPS blocks.

公开(公告)号：EP0953273A1

公开(公告)日：1999-11-03

申请号：EP98900620.0

申请日：1998-01-16

Applicant: NORTEL NETWORKS CORPORATION

Inventor： STACEY, David, John ,  BRUECKHEIMER, Simon, Daniel ,  HUMPHREY, Leslie, Derek

IPC: H04Q11 ,  H04L12

CPC classification number: H04Q11/0478 ,  H04L2012/5605 ,  H04L2012/5606 ,  H04L2012/561 ,  H04L2012/5656 ,  H04L2012/5675

Abstract: Communicative services are transported over a TDMA or TDM access network by packetising the services into minicells which minicells are transported within minislots created by subdivision of the TDM time slots. For low bit rate communicative services only, minislots are allocated periodically rather than in the blocks that are allocated to high bit rate services. The packetisation delay inherent within the transport layer can be significantly reduced for these low bit rate services.

公开(公告)号：EP0954944A1

公开(公告)日：1999-11-10

申请号：EP98900933.0

申请日：1998-01-21

Applicant: NORTEL NETWORKS CORPORATION

Inventor： STACEY, David, John ,  BRUECKHEIMER, Simon, Daniel ,  CAVES, Keith

IPC: H04J3 ,  H04Q11 ,  H04L12

CPC classification number: H04Q11/0478 ,  H04L2012/5616 ,  H04L2012/5656 ,  H04L2012/5671

Abstract: There is disclosed a method and system for multiplexing data from a plurality of user data sources across an ATM adaptation layer type-2 connection, in which a multiplexed trunk group extends across a plurality of common part sub-layer protocol data unit (CPS-PDU) mini-cells, and across a plurality of ATM cells. Large trunk groups are assembled by use of a single bit continuation indicator in the service specific convergence sub-layer header (SSCS) of successive CPS-PDU mini-cells. A packet payload type field (PPT) of the common part sub-layer (CPS)/service specific convergence sub-layer (SSCS) is used to indicate timing of changes in number of user data sources in a trunk group and provides for robust error recovery on loss of a single CPS-PDU mini-cell.