tailieunhanh - Problem statement for distributed and dynamic mobility management draft-chan-distributed-mobility-ps-05

The traditional hierarchical structure of cellular networks has led to deployment models which are heavily centralized. Mobility management with centralized mobility anchoring in existing hierarchical mobile networks is quite prone to suboptimal routing and issues related to scalability. Centralized functions present a single point of failure, and inevitably introduce longer delays and higher signaling loads for network operations related to mobility management. To make matters worse, there are numerous variants of Mobile IP in addition to other protocols standardized outside the IETF, making it much more difficult to create economical and interoperable solutions. In this document we examine the problems of centralized mobility management and identify requirements for distributed and dynamic mobility. | Network Working Group Internet-Draft Intended status Informational Expires May 3 2012 H. Chan Ed. Huawei Technologies October 31 2011 Problem statement for distributed and dynamic mobility management draft-chan-distributed-mobility-ps-05 Abstract The traditional hierarchical structure of cellular networks has led to deployment models which are heavily centralized. Mobility management with centralized mobility anchoring in existing hierarchical mobile networks is quite prone to suboptimal routing and issues related to scalability. Centralized functions present a single point of failure and inevitably introduce longer delays and higher signaling loads for network operations related to mobility management. To make matters worse there are numerous variants of Mobile IP in addition to other protocols standardized outside the IETF making it much more difficult to create economical and interoperable solutions. In this document we examine the problems of centralized mobility management and identify requirements for distributed and dynamic mobility management. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force IETF . Note that other groups may also distribute working documents as Internet-Drafts. The list of current InternetDrafts is at http drafts current . Internet-Drafts are draft documents valid for a maximum of six months and may be updated replaced or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as work in progress. This Internet-Draft will expire on May 3 2012. Copyright Notice Copyright c 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust s Legal Chan Ed. Expires May 3 2012 Page 1 Internet-Draft DMM-PS October 2011 Provisions .