TY - JOUR
T1 - VoIP protection and performance improvement
AU - Karol, Mark
AU - Krishnan, P.
AU - Li, J. Jenny
PY - 2005/3
Y1 - 2005/3
N2 - A lot of ongoing work is geared towards improving the reliability, performance and QoS characteristics of service provider IP networks. In contrast, we propose novel enterprise-based techniques that exploit the fact that many enterprises are multi/dual-homed. In a form of "service-aware routing", certain (e.g., VoIP) packets are duplicated (e.g., at one edge router) and sent over multiple service providers. After traversing the service provider networks, only the first-to-arrive packets are kept and the later-arriving copies are discarded. In so doing, the result is not only better protection against node and link failures, and packet losses and errors, but also better QoS performance under normal (fault-free) operation. The packet-duplication process can be policy-based and take into account costs, bandwidth, and priority issues, permitting the system to behave like a simple "smart router" that automatically and continually makes use of the best (lowest-delay) service provider. In this paper, we present the main ideas behind the proposal, along with some initial analytical and experimental/ simulation results and insights from a Linux-based implementation.
AB - A lot of ongoing work is geared towards improving the reliability, performance and QoS characteristics of service provider IP networks. In contrast, we propose novel enterprise-based techniques that exploit the fact that many enterprises are multi/dual-homed. In a form of "service-aware routing", certain (e.g., VoIP) packets are duplicated (e.g., at one edge router) and sent over multiple service providers. After traversing the service provider networks, only the first-to-arrive packets are kept and the later-arriving copies are discarded. In so doing, the result is not only better protection against node and link failures, and packet losses and errors, but also better QoS performance under normal (fault-free) operation. The packet-duplication process can be policy-based and take into account costs, bandwidth, and priority issues, permitting the system to behave like a simple "smart router" that automatically and continually makes use of the best (lowest-delay) service provider. In this paper, we present the main ideas behind the proposal, along with some initial analytical and experimental/ simulation results and insights from a Linux-based implementation.
KW - IP quality-of-service
KW - Voice over IP
UR - http://www.scopus.com/inward/record.url?scp=17444387104&partnerID=8YFLogxK
U2 - 10.1007/s11235-004-5577-9
DO - 10.1007/s11235-004-5577-9
M3 - Article
AN - SCOPUS:17444387104
SN - 1018-4864
VL - 28
SP - 351
EP - 367
JO - Telecommunication Systems
JF - Telecommunication Systems
IS - 3-4
ER -