Figure 9MIS framework architecture for SDRANs Information Server

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Figure 9—MIS framework architecture for SDRANs Information Server Po. A controller (MIS Po. S)

Figure 9—MIS framework architecture for SDRANs Information Server Po. A controller (MIS Po. S) SDN Controller MISF Open. Flow SDN switch MISF Core MISF SDN control interface Physical path (Data/Control) BBU MISF Po. S 1 (Po. A) MISF Correspondent node Po. S 2 (Po. A) MISF MIS control path BBU Baseband unit Po. S 3 (Po. A) Radio access network (Backhaul) Radio access network (Fronthaul) MN MISF 1

Figure 10— MIS reference model for SDRAN Information Server MIS Po. S (Po. A

Figure 10— MIS reference model for SDRAN Information Server MIS Po. S (Po. A Controller) RP 5 RP 4 Po. S (Switch) Internet Po. S (Po. A) RP 3 SDN control Entity RP 1 RP 2 MISF(MN) Physical path MIS control interface SDN control interface 2

Figure 11— Relationship between different MIS SAPs Information server MIS_Protocol Po. S-A (Po. A)

Figure 11— Relationship between different MIS SAPs Information server MIS_Protocol Po. S-A (Po. A) MIS_Protocol Po. A Controller (Po. S) MIS User MIS_SAP SDN Controller MIS_Protocol MIS_NET_SAP MIS Function Po. S-B (Po. A) MIS_LINK_SAP MIS_NET_SAP Link Layer (Wi. FI, 3 G, LTE) MIS_SAP MN-A MIS_LINK_SAP MIS User MIS_NET_SAP MIS_Protocol MIS Function MIS_LINK_SAP Wi. FI MIS_NET_SAP SDN control interface 3 G, LTE 3

Figure 12—Stages for seamless handover in SDRANs 1. Handover initiation for initiating a new

Figure 12—Stages for seamless handover in SDRANs 1. Handover initiation for initiating a new link 2. Handover preparation for collecting information about neighboring networks 3. Handover decision to decide whether the connection to be switched 4. Handover execution & reporting its allocated radio resources 4

Figure 13—Singaling flows for handover initiation procedure Mobile node Po. S 1 Serving Po.

Figure 13—Singaling flows for handover initiation procedure Mobile node Po. S 1 Serving Po. A Po. S 2 Candidate Po. A Controller SDN Switch MIS MISF user Po. S MISF user a. MIS_Get_Information. request b. MIS_Get_Information request c. MIS_Get_Information response d. MIS_Get_Information. confirm MIS_SAP MIS protocol SDN Controller Po. S MISF user Information Server MIIS Server

Figure 14—Singaling flows for handover initiation procedure Mobile node MISF user Po. S 1

Figure 14—Singaling flows for handover initiation procedure Mobile node MISF user Po. S 1 Serving Po. A Po. S MISF user MAC a. Link_Detected. indication Po. S 2 Candidate Po. A Controller SDN Switch Po. S MIS MISF user Po. S MISF user Information Server MIIS Server b. MIS_Link_Detected. indication c. MIS_MN_HO_Candidate_Query. request d. MIS_MN_HO_Candidate_Query request e. MIS_MN_HO_Candidate_Query. indication f. MIS_N 2 N_HO_Query_Resources. request MIS_LINK_SAP MIS_SAP g. MIS_N 2 N_HO_Query_Resources request h. MIS_N 2 N_HO_Query_Resources. indication i. MIS_N 2 N_HO_Query_Resources. response MIS protocol j. MIS_N 2 N_HO_Query_Resources response k. MIS_N 2 N_HO_Query_Resources. confirm l. MIS_MN_HO_Candidate_Query. response m. MIS_MN_HO_Candidate_Query response n. MIS_MN_HO_Candidate_Query. confirm

Figure 15—Signaling flows for handover preparation procedure Mobile node Po. S 1 Serving Po.

Figure 15—Signaling flows for handover preparation procedure Mobile node Po. S 1 Serving Po. A Po. S 2 Candidate Po. A Controller SDN Switch MIS MISF user Po. S MISF user a. MIS_MN_HO_Commit. request b. MIS_MN_HO_Commit request c. MIS_MN_HO_Commit. indication d. MIS_N 2 N_HO_Commit. request e. MIS_N 2 N_HO_Commit request f. MIS_N 2 N_HO_Commit. indication g. MIS_N 2 N_HO_Commit_response h. MIS_N 2 N_HO_Commit response i. MIS_MN_HO_Commit. confirm k. MIS_MN_HO_Commit response j. MIS_N 2 N_HO_Commit. response l. MIS_MN_HO_Commit. confirm m. MIS_Link_Actions. request MAC n. Link_Actions. request MIS_LINK_SAP MIS_SAP o. Link_Actions. confirm p. MIS_Link_Actions. confirm MIS protocol Information Server MIIS Server

MIS_SDN_HO_Completet_request MIS_SDN_HO_Completet_response Figure 16 —Signaling flows for handover decision procedure Mobile node Po. S

MIS_SDN_HO_Completet_request MIS_SDN_HO_Completet_response Figure 16 —Signaling flows for handover decision procedure Mobile node Po. S 1 Serving Po. A Po. S 2 Candidate Po. A Controller SDN Switch MIS MISF user Po. S MISF user MAC a. Link_Up. indication Information Server MIIS Server MIS-LINK_SAP b. MIS_Link_Up. indication MIS_SAP MIS protocol c. MIS_MN_HO_Complete. request d. MIS_MN_HO_Complete request g. MIS_N 2 N_HO_Complete request e. MIS_MN_HO_Complete. indication f. MIS_N 2 N_HO_Complete. request h. MIS_N 2 N_HO_Complete. indication i. MIS_N 2 N_HO_Completet. response j. MIS_N 2 N_HO_Complete response k. MIS_N 2 N_HO_Complete. confirm l. MIS_MN_HO_Complete. response m. MIS_MN_HO_Complete response n. MIS_MN_HO_Complete. confirm