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5G NR Connection Management States

5G NR Connection Management States

Connection Management is used to establish and release the signalling connection between UE and AMF. CM mainly deals with establishing and releasing a NAS signalling connection between UE and AMF over N1. There are 2 CM states to reflect NAS signalling connection of the UE with …
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5G NR Registration Management States

5G NR Registration Management States

Registration Management is used to register or deregister UE to the network and create a user context in the network. We know that UE needs to register to the network to get the services from the network. There are 2 RM states used in UE and …
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5G SA Core Network Procedure: 5G Core Network PDU Session Release Signaling Process

5G SA Core Network Procedure: 5G Core Network PDU Session Release Signaling Process

If the image is not visible clearly, open the image in new tab and zoom in the image. PDU Session Release procedure is used to release all the resources associated with a PDU Session. 1a. PDU Session Release Request -> (UE requested) The UE initiates the …
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5G SA Core Network Procedure: 5G PDU Session establishment request

5G SA Core Network Procedure: 5G PDU Session establishment request

If the image is not visible clearly, open the image in new tab and zoom in the image. 1. PDU Session Establishment Request UE->AMF NAS Message ( S-NSSAI(s), UE Requested DNN, PDU Session ID, Request type, Old PDU Session ID, N1 SM container ( PDU Session …
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5G SA Core Network Procedure: Network Triggered Service Request

5G SA Core Network Procedure: Network Triggered Service Request

If the image is not visible clearly, open the image in new tab and zoom in the image. This procedure is used when the network needs signalling connection with a UE. Step 1: -> When a UPF receives downlink data for a PDU session and there …
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5G SA Core Network Procedure: UE Triggered Service Request

5G SA Core Network Procedure: UE Triggered Service Request

If the image is not visible clearly, open the image in new tab and zoom in the image. UE in CM-IDLE mode will request service request procedure to establish a secure connection to AMF. UE in CM-IDLE and in CM-CONNECTED mode will initiate service request procedure …
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5G SA Core Network Procedure: Network-initiated De-registration Call Flow

5G SA Core Network Procedure: Network-initiated De-registration Call Flow

If the image is not visible clearly, open the image in new tab and zoom in the image. 1: UDM -> AMF -> If the UDM wants to request the immediate deletion of a subscriber’s RM contexts and PDU Sessions, the UDM shall send a Nudm_UECM_DeregistrationNotification …
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5G SA Core Network Procedure: UE-initiated De-registration Call Flow

5G SA Core Network Procedure: UE-initiated De-registration Call Flow

If the image is not visible clearly, open the image in new tab and zoom in the image. There are 2 types of deregistration requests: 1. UE to NW, if UE does not want to access the 5GS any longer. 2. NW to UE, to inform …
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5G SA Core Network Procedure: Registration Call Flow with AMF re-allocation

5G SA Core Network Procedure: Registration Call Flow with AMF re-allocation

If the image is not visible clearly, open the image in new tab and zoom in the image.   Step 1: Registration Request UE –> RAN Step 2: AMF selection If 5G-S-TMSI or GUAMI is not included or it does not indicate a valid AMF, then …
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5G SA Core Network Procedure: Registration Call Flow without AMF re-allocation

5G SA Core Network Procedure: Registration Call Flow without AMF re-allocation

If the image is not visible clearly, open the image in new tab and zoom in the image.   UE needs to register to the network to get the services from the network. Below are the different registration types: 1. Initial Registration 2. Mobility registration update …
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