Efficient AAL5-based mechanism for handling voice ATM cells to significantly reduce CPU load
US7545828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2003 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5671
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mechanism for implementing a single-interrupt-based voice playout buffer transfer operation. The contents of each respective channel of a multi-channel voice playout buffer are encapsulated so as to prepend a four byte ATM header, a HEC byte, and a four byte AAL2 header to a forty-four byte voice channel field to realize a standard fifty-three byte ATM cell. Within the AAL2 header, a channel identification byte (CID) provides selective mapping to timeslots of a TDM frame, to accommodate variations among different vendor equipments. The next to last bit of the last byte of the ATM header is used as an interrupt to the network processor. Only the highest voice channel asserts this next to last bit as an interrupt bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.