Advertising interdomain QoS routing information

To enable end-to-end quality-of-service (QoS) guarantees in the Internet, based on the border gateway protocol (BGP), interdomain QoS information advertising, and routing are important. However, little research has been done in this area so far. Two major challenges, scalability and heterogeneity, make the QoS extension to BGP difficult. In the existing routing schemes, static and instantaneous QoS metrics, such as link capacity and available bandwidth, are used to represent QoS routing information, but neither of them can solve the two challenges well. In this paper, BGP is extended to advertise available bandwidth and delay information of routes, but, instead of using the traditional deterministic metrics, a series of statistical metrics, available bandwidth index (ABI), delay index (DI), available bandwidth histogram (ABH), and delay histogram (DH), are defined and applied to QoS information advertising and routing. Two major contributions of the proposed statistical metrics are: 1) QoS information is abstracted into one or several probability intervals and, thus, the heterogeneous and dynamic QoS information can be represented more flexibly and precisely and 2) by capturing the statistical property of the detailed distribution of QoS information, these new metrics are efficient and they can highly decrease the message overhead in routing, thereby making the QoS advertising and routing scalable. Our extensive simulations confirm both contributions of the QoS extension to BGP very well. Moreover, besides BGP, these statistical metrics can be applied to other networks and protocols to represent QoS information in a more scalable and precise way.

[1]  Klara Nahrstedt,et al.  Distributed QoS routing with imprecise state information , 1998, Proceedings 7th International Conference on Computer Communications and Networks (Cat. No.98EX226).

[2]  Ariel Orda,et al.  QoS routing in networks with uncertain parameters , 1998, Proceedings. IEEE INFOCOM '98, the Conference on Computer Communications. Seventeenth Annual Joint Conference of the IEEE Computer and Communications Societies. Gateway to the 21st Century (Cat. No.98.

[3]  A. Orda,et al.  QoS routing mechanisms and OSPF extensions , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[4]  Yakov Rekhter,et al.  A Border Gateway Protocol 4 (BGP-4) , 1994, RFC.

[5]  Jennifer Rexford,et al.  Inherently safe backup routing with BGP , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[6]  Ariel Orda,et al.  QoS Routing Mechanisms and OSPF Extensions , 1999, RFC.

[7]  Henning Schulzrinne,et al.  BGRP: A Tree-Based Aggregation Protocol for Inter-domain Reservations , 1999 .

[8]  Susan Hares,et al.  A Border Gateway Protocol 4 (BGP-4) , 1994, RFC.

[9]  Ariel Orda,et al.  QoS routing in networks with inaccurate information: theory and algorithms , 1999, TNET.

[10]  Manish Jain,et al.  End-to-end available bandwidth: measurement methodology, dynamics, and relation with TCP throughput , 2003, TNET.

[11]  William H. Press,et al.  Numerical recipes in C. The art of scientific computing , 1987 .

[12]  C. Jacquenet,et al.  Providing quality of service indication by the BGP-4 protocol : the QoS NLRI attribute , 2001 .

[13]  Nick Feamster,et al.  Controlling the impact of bgp policy changes on ip traffic , 2001 .

[14]  F. A. Seiler,et al.  Numerical Recipes in C: The Art of Scientific Computing , 1989 .

[15]  R. Larsen.  An introduction to mathematical statistics and its applications / Richard J. Larsen, Morris L. Marx , 1986 .

[16]  Henning Schulzrinne,et al.  BGRP: Sink-tree-based aggregation for inter-domain reservations , 2000, Journal of Communications and Networks.

[17]  Gordon T. Wilfong,et al.  The stable paths problem and interdomain routing , 2002, TNET.

[18]  Manish Jain,et al.  End-to-end available bandwidth: measurement methodology, dynamics, and relation with TCP throughput , 2003, IEEE/ACM Trans. Netw..

[19]  Mario Gerla,et al.  Extending BGMP for Shared-Tree Inter-Domain QoS Multicast , 2001, IWQoS.

[20]  João L. Sobrinho,et al.  Network routing with path vector protocols: theory and applications , 2003, SIGCOMM '03.

[21]  Walter Willinger,et al.  On the self-similar nature of Ethernet traffic , 1993, SIGCOMM '93.