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draft-xiong-dmm-ip-reachability-00

draft-xiong-dmm-ip-reachability-00. Chunshan Xiong, Jianning Liu Huawei Technologies. MN IP Reachability Problem. If Mobile host has multiple IP address, the CN3 wants to initiates a new IP session with the MN, which/How the MN’s IP address is selected? Why ?. CN1. CN2. CN3. To MN1. MR1.

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draft-xiong-dmm-ip-reachability-00

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  1. draft-xiong-dmm-ip-reachability-00 Chunshan Xiong, Jianning Liu Huawei Technologies IETF 88, Vancouver

  2. MN IP Reachability Problem If Mobile host has multiple IP address, the CN3 wants to initiates a new IP session with the MN, which/How the MN’s IP address is selected? Why ? CN1 CN2 CN3 To MN1 MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  3. DDNS Method DDNS Server • The MN1 has a global unique ID, e.g. FQDN • When the MN1 gets a new IP address, it can register its new IP address to the DDNS Server with its ID. • The CN3 wants to setup a new IP session with the MN1, CN3 gets he MN1 IP address from the DDNS Server. • The CN3 uses the IP address provided by the DDNS Server to setup the IP Session. • . 3. DNS Request (MN1 ID) 4. DNS Response(Ipx) CN1 CN2 CN3 1.Register with MN1 ID & IP1 2. Register with MN1 ID & IP2 5. Setup IP Session To IPx MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  4. Server Registration Method 3. Register with CN3 Service ID & CN3 IP address Server • The MN1 and CN3 register to the same Server for a special service (e.g. MSN Messenger) using its IP address. • When the MN1 gets a new IP address, it can register its new IP address to the Server. • If CN3 wants to initiate a service to the MN1, there are 3 modes to setup the IP session: • P2P mode: After the server provides MN1 IP address and Port information to the CN3, the CN3 directly setup the IP Session with the MN1 without the server involved. • Server Central mode: For the CN3, the server proxies the MN1 , at the same time for the MN1,the server proxies the CN3, the Servers is in the CP/UP path of the IP session between CN3 and MN1; • Combined mode: The server is only in the path of the signaling path of the IP session between the CN3 and MN1, and the user plane is directly setup between CN3 and MN1. CN1 CN2 CN3 Register with MN1 Service ID & IP1 2. Register with MN1 Service ID & IP2 To IPx MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  5. Server Registration MethodP2P Mode 3. Register with CN3 Service ID & CN3 IP address Server • The MN1 and CN3 register to the same Server for a special service (e.g. MSN Messenger) using its IP address. • When the MN1 gets a new IP address, it can register its new IP address to the Server. • If CN3 wants to initiate a service to the MN1, it sends the “Service Request to MN1”message to the server • The server then provides MN1 IP address and Port information to the CN3, the CN3 directly setup the IP Session with the MN1 without the server involved. 4.Service Request to MN1 5. MN1 IP & Port CN1 CN2 CN3 Register with MN1 Service ID & IP1 2. Register with MN1 Service ID & IP2 5.Setup IP Session with MN1 To IPx MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  6. Server Registration MethodServer Central Mode 3. Register with CN3 Service ID & CN3 IP address Server • The MN1 and CN3 register to the same Server for a special service (e.g. MSN Messenger) using its IP address. • When the MN1 gets a new IP address, it can register its new IP address to the Server. • If CN3 wants to initiate a service to the MN1, it sends the “Service Request to MN1”message to the server • The Server provide its IP address and port information to the CN3 as the MN1 contact information. • At the same time, the server proxies the CN3 to setup an IP Session to MN1. • After that, the IP session between CN3 and MN1 is combined two parts: CN3-Server part and Server-MN1 part. i.e. the Servers is in the CP/UP path of the IP session between CN3 and MN1; 4.Service Request to MN1 5. Server IP & Port CN1 CN2 CN3 Register with MN1 Service ID & IP1 2. Register with MN1 Service ID & IP2 5.Setup IP Session with MN1 4b.Service Request to MN1 MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  7. Server Registration MethodCombined Mode 3. Register with CN3 Service ID & CN3 IP address Server • The MN1 and CN3 register to the same Server for a special service (e.g. MSN Messenger) using its IP address. • When the MN1 gets a new IP address, it can register its new IP address to the Server. • If CN3 wants to initiate a service to the MN1, it sends the “Service Request to MN1”message to the server • Similar as Service Central mode, the CP for the IP session pass through the Server, but the UP for the IP session is directly established between the CN3 and MN1. If there is no CP and UP for the IP session, then combined mode is server central mode. 4.Service Request to MN1 5. Server IP & Port CN1 CN2 CN3 Register with MN1 Service ID & IP1 2. Register with MN1 Service ID & IP2 5.Setup IP Session with MN1 4b.Service Request to MN1 MR1 MR2 path 2 IP1 IP2 IP1 MN1 MN1 IETF 88, Vancouver

  8. Issues to be investigated • The paper shows there are no big potential issues with the MN IP reachability for the DMM, but the following issues still needs to be investigated: • When does the MN update its new IP address to the DNS/APP Server and to keep the previous IP session’s continuity? • If the MN’s old and new IP address are used for the CP and UP separately, then when to update the IP address registration in the APP server ? IETF 88, Vancouver

  9. How to Forward • Collect MN IP reachability issues and provide detailed IP address updating in the DNS/APP server during/after the DMM procedure. • Possible or Necessary to continue to update the draft ? IETF 88, Vancouver

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