公开(公告)号：DE60301620T2

公开(公告)日：2006-06-14

申请号：DE60301620

申请日：2003-03-10

Applicant: IBM

Inventor： ELEFTHERIOU S ,  OELCER SEDAT ,  ABDELILAH YOUSSEF ,  DAVIS TAYLOR ,  DERBY H ,  HWANG DONGMING ,  WARE MALCOLM ,  YE HUA

IPC: H04L29/06 ,  H04Q11/00 ,  H04M11/06

Abstract: A method and systems for optimizing Asymmetric Digital Subscriber Line (ADSL) connections in DSL Access Multiplexor (DSLAM) that marries benefits of G.dmt and G.lite standards, using a flexible method implemented on a programmable Digital Signal Processor (DSP) and a Network Processor (NP) is disclosed. It provides a means to support full G.dmt rates for any of the attached users as long as less than half the users are actively moving data through the DSLAM, but by only using half the digital signal processing hardware and half the power consumption for the line drivers. The invention allows doubling the number of,ADSL ports available over a conventional scheme given about 20% more power is under 50% with only half the respective connections, all those G.dmt rates possible on their exceeds 50%, gradually active G.lite rates based on either based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates. budget. When the utilization subscribers active on their users experience the maximum wire. However, when utilization subscribers start to experience a fixed policy or one that is based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates.

公开(公告)号：DE60015186T2

公开(公告)日：2006-02-02

申请号：DE60015186

申请日：2000-12-21

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  DAVIS TAYLOR ,  GALLO MATTEO ,  HEDDES MARCO ,  JENKINS KENNETH ,  LEAVENS BOYD ,  SIEGEL STEVEN ,  VERPLANKEN JEAN

IPC: G06F9/46 ,  H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L45/60

Abstract: A system and method of frame protocol classification and processing in a system for data processing (e.g., switching or routing data packets or frames). The present invention includes analyzing a portion of the frame according to predetermined tests, then storing key characteristics of the packet for use in subsequent processing of the frame. The key characteristics for the frame (or input information unit) include the type of layer 3 protocol used in the frame, the layer 2 encapsulation technique, the starting instruction address, flags indicating whether the frame uses a virtual local area network, and the identity of the data flow to which the frame belongs. Much of the analysis is preferably done using hardware so that it can be completed quickly and in a uniform time period. The stored characteristics of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address and the location of the beginning of the layer 3 header as well as flags for the type of frame. That is, the instruction address or code entry point is used by the processor to start processing for a frame at the right place, based on the type of frame. Additional instruction addresses can be stacked and used sequentially at branches to avoid additional tests and branching instructions. Additionally, frames comprising a data flow can be processed and forwarded in the same order in which they are received.

公开(公告)号：DE60015186D1

公开(公告)日：2004-11-25

申请号：DE60015186

申请日：2000-12-21

Applicant: IBM

Inventor： BASS MITCHELL ,  CALVIGNAC LOUIS ,  DAVIS TAYLOR ,  GALLO MATTEO ,  HEDDES MARCO ,  JENKINS KENNETH ,  LEAVENS BOYD ,  SIEGEL STEVEN ,  VERPLANKEN JEAN

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L45/60 ,  G06F9/46 ,  H04L29/06

Abstract: A system and method of frame protocol classification and processing in a system for data processing (e.g., switching or routing data packets or frames). The present invention includes analyzing a portion of the frame according to predetermined tests, then storing key characteristics of the packet for use in subsequent processing of the frame. The key characteristics for the frame (or input information unit) include the type of layer 3 protocol used in the frame, the layer 2 encapsulation technique, the starting instruction address, flags indicating whether the frame uses a virtual local area network, and the identity of the data flow to which the frame belongs. Much of the analysis is preferably done using hardware so that it can be completed quickly and in a uniform time period. The stored characteristics of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address and the location of the beginning of the layer 3 header as well as flags for the type of frame. That is, the instruction address or code entry point is used by the processor to start processing for a frame at the right place, based on the type of frame. Additional instruction addresses can be stacked and used sequentially at branches to avoid additional tests and branching instructions. Additionally, frames comprising a data flow can be processed and forwarded in the same order in which they are received.

公开(公告)号：DE60301620D1

公开(公告)日：2005-10-20

申请号：DE60301620

申请日：2003-03-10

Applicant: IBM

Inventor： ELEFTHERIOU S ,  OELCER SEDAT ,  ABDELILAH YOUSSEF ,  DAVIS TAYLOR ,  DERBY H ,  HWANG DONGMING ,  WARE MALCOLM ,  YE HUA

IPC: H04L29/06 ,  H04M11/06 ,  H04Q11/00

Abstract: A method and systems for optimizing Asymmetric Digital Subscriber Line (ADSL) connections in DSL Access Multiplexor (DSLAM) that marries benefits of G.dmt and G.lite standards, using a flexible method implemented on a programmable Digital Signal Processor (DSP) and a Network Processor (NP) is disclosed. It provides a means to support full G.dmt rates for any of the attached users as long as less than half the users are actively moving data through the DSLAM, but by only using half the digital signal processing hardware and half the power consumption for the line drivers. The invention allows doubling the number of,ADSL ports available over a conventional scheme given about 20% more power is under 50% with only half the respective connections, all those G.dmt rates possible on their exceeds 50%, gradually active G.lite rates based on either based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates. budget. When the utilization subscribers active on their users experience the maximum wire. However, when utilization subscribers start to experience a fixed policy or one that is based on a tiered tariff structure, until ultimately, when the utilization reaches 100%, all subscribers will be forced back to a maximum rate afforded by G.lite. Only as utilization drops back off, will active subscribers be brought back up to G.dmt's maximum transmission rates. Once the utilization drops below 50% again, then all active subscribers will be able to utilize G.dmt's maximum transmission rates.