Network Address Translation (NAT) Overview
43 Matching Annotations
- Dec 2023
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www.netmanias.com www.netmanias.com
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NAT Behavioral Requirements
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www.netmanias.com www.netmanias.com
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stackoverflow.com stackoverflow.com
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HTTP URL max length
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- Nov 2023
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www.tech-invite.com www.tech-invite.com
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for the whole set of UEs
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zero
what zero means?
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- May 2023
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www.tech-invite.com www.tech-invite.com
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PSI
Policy Section ID
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This procedure is used to update UE policy and/or UE policy triggers.
PCF triggers URSP
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when a UE Policy Container is received from the UE
UE send policy container to AMF
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the AKMA architecture becomes entirely different compared to GBA
AKMA
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www.tech-invite.com www.tech-invite.com
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each S-NSSAI may contain a Subscribed DNN
Subscription for one S-NSSAI: 1. a list of Subscribed DNN 1. one default DNN
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PDU Session types are defined: IPv4, IPv6, IPv4v6, Ethernet, Unstructured.
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The expectation is that the URSP in the UE is always up to date
Use URSP to sync DNN to UE.
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www.tech-invite.com www.tech-invite.com
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Network Slice Simultaneous Registration Group (NSSRG)
restrictions to the simultaneous registration of network slices
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For any S-NSSAI, the network may at any one time serve the UE with only one Network Slice instance associated with this S-NSSAI until cases occur
For the same S-NSSAI, network only have unique network slice instance serving for the UE.
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a Network Slice instance can be associated with one or more S-NSSAIs, and an S-NSSAI can be associated with one or more Network Slice instances
S-NSSAI and Network Slice instance doesn't have a one-to-one relationship.
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eight S-NSSAIs
Max 8 S-NSSAIs in Allowed and Requested NSSAI.
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such S-NSSAI is comprised of either both an SST and an SD or only an SST without a standardised SST value and no SD
non-standard values,
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Network Slice Simultaneous Registration Group (NSSRG)
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Network Slice Admission Control (NSAC)
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Network Slice-Specific Authentication and Authorization (NSSAA)
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Number of simultaneous connection of Network Slice instances per UE is limited
up to 8?
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The AMF instance serving the UE logically belongs to each of the Network Slice instances serving the UE,
The AMF serving for the UE will also serve for all slices of the UE.
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www.tech-invite.com www.tech-invite.com
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UE Configuration Update procedure for transparent UE Policy delivery
PCF tiggered
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NSSAI information (e.g. Allowed NSSAI),
need acknowledgement
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trigger UE to perform
- Mobility Registration Update procedure while the UE is in CM-CONNECTED state
- Mobility Registration Update procedure while the UE is in CM-IDLE state
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Access Type (i.e. 3GPP access or non-3GPP access)
Access Type : {3GPP, non-3GPP}
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UE Configuration Update
UE Configuration Update -> UCU
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www.techplayon.com www.techplayon.com
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concealed SUPI is known as SUCI (Subscription Concealed Identifier )
SUCI -> concealed SUPI
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Subscription Permanent Identifier
SUPI
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www.techplayon.com www.techplayon.com
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5G Global Unique Temporary Identifier
- temporary ID
- allocated by AMF
- 80 bits
- PLMN + AMF ID + TMSI
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A UE in CM-CONNECTED state can be in RRC Inactive state
Possible case
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www.techplayon.com www.techplayon.com
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When UE is in CM-Idle
When the UE has registered but still in CM-IDLE
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Registration Request
When the UE is first powered on.
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Registration Request and Service Request
Note: "and"
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once an RRC connection has been established
prerequisites
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CM-Connected
has signaling connection
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CM-Idle
No signaling connection
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N1 logical interface and it is combination of following
N1 logical interface
UE <==RRC ==>gNB<==N2-AP==>AMF -
Connection Management (CM) is used to establish and release the control plane signaling connection between UE and AMF.
connection = connection between UE and AMF
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5G System Connection Management
CM -> Connection Management
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blog.3g4g.co.uk blog.3g4g.co.uk
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User Equipment Route Selection Policy, or URSP
User Equipment Route Selection Policy
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www.sharetechnote.com www.sharetechnote.com
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Basically APN is controlling network parameters (or configurations) by switching the traffic to various different gateway on the core network.
APN
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