Seamless Handover Framework for SDRANs

This framework showcases the architecture, reference model, SAP relationships, and signaling flows for seamless handover in Software-Defined Radio Access Networks (SDRANs). It details the stages involved in handover initiation, preparation, decision-making, execution, and reporting, emphasizing the crucial role of various network entities and interfaces. The visual illustrations provide a comprehensive view of the network components, control mechanisms, and efficient handover procedures.

• SDRANs
• Handover Framework
• Network Architecture
• SDN Control
• Signal Flows

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Uploaded on Sep 29, 2024 | 0 Views

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1. Figure 9MIS framework architecture for SDRANs PoAcontroller (MIS PoS) SDN Information Server Controller MISF OpenFlow SDN switch Correspondent node MISF MISF Core MISF Radio access network (Backhaul) SDN control interface BBU PoS 2 (PoA) PoS 1 (PoA) PoS 3 (PoA) MISF MISF MISF Physical path (Data/Control) Radio access network (Fronthaul) MIS control path BBU Baseband unit MN MISF 1

2. Figure 10 MIS reference model for SDRAN Information Server MIS PoS (PoAController) SDN control Entity RP5 RP4 RP4 PoS (Switch) PoS (Switch) Internet PoS (PoA) PoS (PoA) Physical path RP3 RP1 RP2 MIS control interface MISF(MN) SDN control interface 2

3. Figure 11 Relationship between different MIS SAPs Information server MIS_Protocol MIS_Protocol PoS-A (PoA) PoAController (PoS) SDN Controller MIS User MIS_SAP MIS_Protocol MIS_NET_SAP MIS Function PoS-B (PoA) MIS_LINK_SAP MIS_NET_SAP Link Layer (WiFI, 3G, LTE) MIS_SAP MN-A MIS_LINK_SAP MIS User MIS_NET_SAP MIS_SAP MIS_Protocol MIS Function SDN control interface MIS_LINK_SAP MIS_NET_SAP 3G, LTE WiFI 3

4. Figure 12Stages 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

5. Figure 13Singaling flows for handover initiation procedure PoS 2 PoS 1 PoA SDN Switch PoS MISF Information Server MIIS Server Mobile node Candidate PoA Serving PoA PoS MISF Controller PoS MISF MIS user MIS user PoS MISF MIS user MIS user MIS userMISF 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 ControllerPoS MIS user MISF

6. Figure 14Singaling flows for handover initiation procedure PoS 2 PoS 1 PoA Information Server MIIS Server SDN Switch PoS MISF Mobile node Candidate PoA Serving PoA PoS MISF Controller PoS MISF MIS user MIS user PoS MISF MIS user MIS user MIS userMISF MAC a. Link_Detected.indication 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_N2N_HO_Query_Resources.request g. MIS_N2N_HO_Query_Resources request MIS_LINK_SAP h. MIS_N2N_HO_Query_Resources.indication MIS_SAP i. MIS_N2N_HO_Query_Resources.response MIS protocol j. MIS_N2N_HO_Query_Resources response k. MIS_N2N_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

7. Figure 15Signaling flows for handover preparation procedure PoS 2 Information Server MIIS Server PoS 1 PoA SDN Switch PoS MISF Mobile node Candidate PoA Serving PoA PoS MISF Controller PoS MISF MIS user MIS user PoS MISF MIS user MIS user MIS userMISF a. MIS_MN_HO_Commit.request b. MIS_MN_HO_Commit request c. MIS_MN_HO_Commit.indication d. MIS_N2N_HO_Commit.request e. MIS_N2N_HO_Commit request f. MIS_N2N_HO_Commit.indication g. MIS_N2N_HO_Commit_response h. MIS_N2N_HO_Commit response i. MIS_MN_HO_Commit.confirm j. MIS_N2N_HO_Commit.response k. MIS_MN_HO_Commit response l. MIS_MN_HO_Commit.confirm MIS_LINK_SAP m. MIS_Link_Actions.request n. Link_Actions.request o. Link_Actions.confirm MIS_SAP MAC MIS protocol p. MIS_Link_Actions.confirm

8. MIS_SDN_HO_Completet_request MIS_SDN_HO_Completet_response Figure 16 Signaling flows for handover decision procedure PoS 2 Information Server MIIS Server PoS 1 PoA SDN Switch PoS MISF Mobile node Candidate PoA Serving PoA PoS MISF Controller PoS MISF MIS user MIS user PoS MISF MIS user MIS user MIS userMISF MAC a. Link_Up.indication MIS-LINK_SAP b. MIS_Link_Up.indication MIS_SAP MIS protocol c. MIS_MN_HO_Complete.request d. MIS_MN_HO_Complete request e. MIS_MN_HO_Complete.indication f. MIS_N2N_HO_Complete.request g. MIS_N2N_HO_Complete request h. MIS_N2N_HO_Complete.indication i. MIS_N2N_HO_Completet.response j. MIS_N2N_HO_Complete response k. MIS_N2N_HO_Complete.confirm l. MIS_MN_HO_Complete.response m. MIS_MN_HO_Complete response n. MIS_MN_HO_Complete.confirm