IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-12-0075-02-srho Title: Missing Gaps and Solutions for MGW Date Submitted: Presented at IEEE 802.21c TG Authors or Source(s): Hyunho Park (ETRI), Hyeong-Ho Lee (ETRI), Anthony Chan (Huawei) Abstract: This contribution shows missing gaps of the current MGW and solution for the missing gaps 21-12-0075-02-srho

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Reference model for single radio handover 21-12-0075-02-srho

Missing Gap 1 How does the target network MGW know what to do with it? The header field of IEEE 802.21c may indicate to the target network MGW how to handle the content Source network Target network MGW Target POA MN ? Case 1.The L2 frame for pre-registration may be transmitted to the Target PoA Case 2. Control message such as MIH messages can be processed in the target network MGW 21-12-0075-02-srho

Missing Gap 2 How does the source network MGW know what to do with it? The header field of IEEE 802.21c may indicate to the source network MGW how to handle the content Source network Target network ? Target POA MN MGW MGW Case 1. The source network MGW may forward to L2 frame for pre-registration the target PoA Case 2. Control message such as MIH messages can be processed in the source network MGW 21-12-0075-02-srho

Solution MTI (Message Type Indicator) to distinguish between L2 message for pre-registration and control messages for MGW is needed Interworking protocol types is needed to distinguish delivery of interworking protocols (IEEE 802.21c single radio handover content, ANQP of IEEE 802.11u, WiMAX interworking protocols (Rx, Ry, R9), ANDSF messages of 3GPP) Control messages for MGW are needed 21-12-0075-02-srho

Control Messages for Each Step for Handover Single Radio handover Control Function (SRCF) of a multiple interface mobile node as a Media Independent Control Function (MICF) in the media independent control plane. Overall Single Radio Handover Procedures 21-12-0075-02-srho

Step 1. Network discovery 1. Listening to the target link 2. Using location information 3. With user schedule information 21-12-0075-02-srho

1. Listening to the target link MICF SRCF Candidate IF Source IF (2) Link_Detected.indication : Detect a new link (0) Link_IF_RxTurnOn.request :Turn on the receiver of the candidate IF (1) Network Detection Related Message (e.g. Beacon in WLAN) Candidate PoA MN Side 21-12-0075-02-srho

2. Using location information (1) MIH_Get_Information request : Send the location information (IE_MN_LOCATION) of the MN MN SRCF IR SRCF (2) MIH_Get_Information response : Respond with network access information (IE_NETWORK_TYPE, IE_NET_FREQUENCY_BANDS, etc.) 21-12-0075-02-srho

3. Using user schedule information (1) MIH_Get_Information request : Send the time information (IE_MN_TIME) of the MN MN SRCF IR SRCF (2) MIH_Get_Information response : Respond with network access information (IE_NETWORK_TYPE, IE_NET_FREQUENCY_BANDS, etc.) 21-12-0075-02-srho

Network Discovery Messages MICLSAP MICSAP Primitives Service category Description Link_IF_RxTurnOn Command Turn on the receiver of the network interface Primitives Service category Description MIH_IF_RxTurnOn Command Turn on the receiver of the network interface 21-12-0075-02-srho

Information Elements Name of information element or container Description IE_MN_LOCATION Geographical location of the mobile node. Multiple location types are supported including coordinate-based location information, civic address, and cell ID. IE_MN_TIME Scheduled event time of the mobile node. Location and access network information can be coupled with time information. 21-12-0075-02-srho

Step 2. HO Decision 1. SINR of the Source Link 2. QoS and/or Cost Check by the MN 3. Power Consumption Check by the MN 21-12-0075-02-srho

1. SINR of the Source Link MN Side MN SRCF Target IF Source IF (1) Link_Going_Down.indication : Weak SINR is reported (2) Link_IF_PreReg_Ready.request :Prepare pre-registration (3) Link_IF_PreReg_Ready.confirm : Respond to preparation of pre-registration MN Side 21-12-0075-02-srho

2. QoS and/or Cost Check by the MN (1) MIH_Get_Information request : Request monitored QoS and/or Cost of target network (IE_COST, IE_NETWORK_QOS, etc.) Source MGW SRCF Target MGW SRCF MN SRCF (3) MIH_IF_PreReg_Ready.request : Prepare pre-registration of the target network interface (2) MIH_Get_Information response : Request monitored QoS and/or Cost of target network (IE_COST, IE_NETWORK_QOS, etc.) (4) Link_IF_PreReg_Ready.request : Prepare pre-registration of the target network interface (5) Link_IF_PreReg_Ready.confirm : Respond to preparation of pre-registration Target IF 21-12-0075-02-srho

3. Power Consumption Check by the MN SRCF (1) Link_Power_Query.request :Ask power consumption (1) Link_Power_Query.request :Ask power consumption (2) Link_Power_Query.confirm : Respond to the query (2) Link_Power_Query.confirm : Respond to the query (3) LINK_IF_PreReg_Ready.request (4) LINK_IF_PreReg_Ready.confirm Target IF Source IF MN Side 21-12-0075-02-srho

HO Decision Messages MICLSAP MICSAP Primitives Service category Description Link_IF_PreReg_Ready Command Prepare pre-registration of the target network interface Link_Power_Query Query power consumption of the dedicated link interface Primitives Service category Description MIH_IF_PreReg_Ready Command Prepare pre-registration of the target network interface MIH_Power_Query Query power consumption of the dedicated link interface 21-12-0075-02-srho

Step 3. Proactive authentication, Pre-registration (1) MIH_PreReg_Query Request: Prepare pre-registration MN SRCF Target MGW SRCF (2) MIH_PreReg_Query Response (3) MIH_L3Tunnel_Query Request: Prepare L3tunnel between the MN and the target MGW (4) MIH_L3 Tunnel_Query Response (5) MIH_UPLINK_MSG: Uplink messages for pre-registration (6) MIH_DOWNLINK_MSG: Downlink messages for pre-registration 21-12-0075-02-srho

Pre-registration Messages MICLSAP MICSAP Primitives Service category Description Link_UPLINK_PDU L2frame Transport the target radio L2 uplink frame Link_DOWNLINK_PDU Transport the target radio L2 downlink frame Primitives Service category Description MIH_PreReg_Query Command Query pre-registration for the target network - This primitive helps the MN not exchange unnecessary L2 messages MIH_L3Tunnel_Query Query setting for the tunnel between the MN and the MGW MIH_UPLINK_PDU Transport the target radio L2 uplink frame MIH_DOWNLINK_PDU Transport the target radio L2 downlink frame 21-12-0075-02-srho

Step 4. Target Link Preparation (3) MIH_Push_Information indication (with Target PoA Information) :Push the information of the network access information (IE_NETWORK_TYPE, IE_NET_FREQUENCY_BANDS, etc.) Target MGW SRCF MN SRCF (1) MIH_N2N_HO_Query_Resources request : Prepare resources at the target PoA (2) MIH_N2N_HO_Query_Resources response (with Target PoA Information) : Respond to the preparation of resources at the target PoA Target PoA 21-12-0075-02-srho

Step 5. SRHO Execution Activates the target network interface and handover to the target network Target MGW SRCF MN SRCF (1) MIH_MN_HO _Complete request (2) MIH_MN_HO _Complete response (3) Link_IF_TxTurnOn.request : Enable transmitter of the target interface (3) Link_IF_TurnOff.request : Turn off source network interface Target IF Source IF 21-12-0075-02-srho

SRHO Execution Messages MICLSAP MICSAP Primitives Service category Description Link_IF_TxTurnOn Command Turn on the transmitter of the network interface Link_IF_TurnOff Turn off the network interface Primitives Service category Description MIH_IF_TxTurnOn Command Turn on the transmitter of the network interface MIH_IF_TurnOff Turn off the network interface 21-11-0075-02-srho