1. 1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-12-0097-00-srho Title: Consideration for MGW discovery Date Submitted: July 18, 2012 Presented at IEEE 802.21 Authors or Source(s): Hyunho Park (ETRI), Hyeong-Ho Lee (ETRI), Anthony Chan (Huawei) Abstract: This presentation provides an example of MGW discovery based on anycast for single radio handover 21-12-0097-00-srho

2. 2 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21. The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3 http://standards.ieee.org/board/pat/guide.html IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21. The contributor is familiar with IEEE patent policy, as stated in Section 6 of the IEEE-SA Standards Board bylaws and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf> Section 6 of the IEEE-SA Standards Board bylawshttp://standards.ieee.org/guides/bylaws/sect6-7.html#6 http://standards.ieee.org/board/pat/faq.pdf 21-12-0097-00-srho

3. Missing Gap of MGW Discovery Although a mobile node (MN) needs to discover the mobility gateway (MGW), MGW discovery is not considered, yet. We consider MGW discovery using anycast 3 21-12-0097-00-srho

4. Anycast 4 A network addressing and routing methodology in which datagrams from a single sender are routed to the topologically nearest node in a group of potential receivers all identified by the same destination address http://www.netlinxi nc.com/netlinx- blog/45-dns/118- introduction-to- anycast-dns.html http://www.netlinxi nc.com/netlinx- blog/45-dns/118- introduction-to- anycast-dns.html 21-12-0097-00-srho

5. Anycast based MGW Discovery Through information repository (IR), MNs can access the nearest MGW IR supports anycast IP address mapped with wireless access network types Reduces load of both wireless network and system 5 Wireless Access Network TypesAnycast IP Address 0: WiFiAnycast IP Address of WiFi MGW 1: WiMAXAnycast IP Address of WiMAX MGW 2: UMTSAnycast IP Address of UMTS MGW 3: LTEAnycast IP Address of LTE MGW 4~7: Reserved Table 1. anycast IP address mapped with wireless access network types 21-12-0097-00-srho

6. Anycast based MGW Discovery Multi-radio MN Information Repository ( IR) MGW AS_Info_Query (Wireless Access Network Types) AS_Info_Response (anycast addr) AS_Info_Push (anycast addr) Access to MGW (anycast addr) (a) (b) 21-12-0097-00-srho

7. Procedure Anycast address discovery (a) Push-Pull mechanism MN request the anycast address of MGW IR response the anycast address of MGW (b) Push mechanism IR pushes anycast address of MGW without any request of MN 7 21-12-0097-00-srho