Nas Sharetechnote, This would make message decoding/encoding pro
- Nas Sharetechnote, This would make message decoding/encoding process complicated but it would be efficient to reduce the number of message exchange between UE and eNodeB. In terms of protocol point of view, it is not simpler than the legacy LTE. Field Test OTA (Over The A ir) Release 16 Release 17 Massive MIMO ? WhyMassiveMIMO ? Propagation Model 5G Success 5G 4G/LTE - Attach Type Attach Type The Attach Type indicates the purpose of the attach and as in most of other procedure, the attach type is also determined by a kind of mutual agreement between UE and Network. NAS layer gets connected to AMF (Access and Mobility Management Function). 3. Example 14 : SA supportability Example 15 : NSA supportability - NAS Capability Example 16 : NSA supportability - RRC/Lower Layer Capability Example 17 : Parameters determining Ideal Max Throughput How to handle the ever increasing size of UE capability Information ? (RRC Segmentation) Example 01 Why UE capability checking is important ? UE Capability in Detail The purpose (Function) of UE Capability Information in NR is same as LTE UE Capability Information. g, rush time traffic, regular hour traffic, eMBB, IoT etc 4G/LTE - Network Architecture LTE Network Architecuture and Interface Most of my carrier about wireless area was about the wireless communication between UE (Mobile phone) and eNB/BTS, I tend to assume that all other readers has the same interest/focus as mine. It means that UE indicates the attatch type I want to get and Network finaly determines available attach type and informs it to UE as in following procedure. Even in terms of 3GPP, the details of VoNR procedure is described in 23. 1 and table 9. It is true. NAS stands for Non-Access. What I've mentioned can be described in a block diagram as shown below. I 5G | ShareTechnote RACH RRC Overview RrcReconfiguration NSA/ENDC SA/Initial Attach UE Capability Paging Power Control MIMO Config. For the high level description of NB-LTE and some comparative view of other technology, refer to LTE-M/Category M/M1/M2 page. g. It is responsible for establishing and maintaining the device’s mobility context, ensuring that the network is always aware of the device’s availability and general 4G/LTE - NB IoT NB-IoT NB-LTE stands for Narrow Band LTE. NR also reports similar information (i. DL MIMO Config. Field Test OTA (Over The A ir) Release 16 Release 17 Massive MIMO ? WhyMassiveMIMO ? Propagation Model 5G Success 5G Challenges Acronyms s Qualcomm Video PDCP SS Block Scheduling MIB / SIB RACH RRC Overview RrcReconfiguration NSA/ENDC SA/Initial Attach UE Capability Paging Power Control MIMO Config. 5G/NR - NAS 5GMM (5G Mobility Management) 5GMM, or 5G Mobility Management, is the sublayer within the 5G NAS protocol that governs how a mobile device connects to, remains registered with, and moves within the 5G core network. I have vague understanding about these that these concept replaces the concept of APN in LTE, but for long time the concept hasn't come clear to me. For the details of full registration, check out this note Direction Message Comment UE -> NW RRC : RRC Connection Setup Complete + NAS : Attach Request + ESM : PDN Connectivity Request UE Request a PDN with specific IP type UE <- NW RRC : RRC Connection Reconfiguration + NAS : Attach Accept + NAS : Activate Default EPS Bearer Context Req Network Allocate a sepcific IP to UE In this note, I would mostly focus on the two NAS messages between UE and the Network (especially AMF) and contents of the two messages, but there are a lot of other network components and interactions among those components happen. Exploding the architecture into more detailed level, it can be illustrated as follows. In LTE, they are using separate Security Mode process for NAS and RRC, whereas in WCDMA only one security mode process (RRC only) was used (NAS is indirectly protected since NAS message was embedded in RRC and protected as a part of RRC message). NAS Integrity Algorithm NAS : Security Framework NAS Security Header NAS Security Mode Control Procedure NB-LTE Network Architecture and Interface Network Sharing - Cell Site Sharing, MOCN, MVNO NOMA / Enhanced MU MIMO / NAIC NonPersistent Scheduling Non-3GPP Based Technology Paging p_a, p_b PBCH (Specification, Matlab) PCO (Protocol In case of C-Plane, the two layers RRC and NAS are sitting at the top of the stack. PDN Connectivity Request (LTE) ActivateDefaultEPSBearerContextRequest (LTE) ActivateDefaultEPSBearerContextAccept (LTE) PDU session establishment request (NR) 5G/NR - Network Slicing Network Slicing Data between UE and Network (or another UE) go through various components on the data path. There are three different 4G/5G - NAS NAS Security Framework Imagine your phone's connection to the network as a special, secret conversation. It uses secret codes to make sure only your phone and the network can understand each other. Overall flow from Key Generations and final output for NAS Integrity can be illustrated as follows : The key points of this diagrams are 1. e, RF/PHY information and Feature sets) but much more diverse information than LTE. There are several important NAS signaling messages related to 5G Authentication. They are all based on Voice call over IMS. The NAS message container is a type 4 information element with a minimum length of 4 octets and a maximum length of 253 octets. 1. 228 which is mainly for IMS for LTE and 5G specific details 5G/NR - Network Architecture NR Network Architecture / Network Interface - N1 / N1-Mode N1 interface (Reference Point) indicates the connection between UE and AMF mainly for NAS layer signaling, but the exact role of N1 interface (reference point) is a little bit ambiguous to me. How a NAS message is securely protected using these keys, ensuring its authenticity and preventing tampering or replay attacks. In most case, the resource allocation and the data path is configured statically or semi-statically. It's like a hidden protector that makes sure you can use your phone without worrying about anyone interfering or stealing your information. SMS over NAS: This method allows SMS messages to be transmitted directly over the 5G network's Non-Access Stratum, a layer that facilitates communication between a device and the network's core, independent of the radio access technology. 22. In LTE UE capability information carries the information in roughly two large category : RF/Physical layer information and Feature Group (FGI). The NAS message container information element is coded as shown in figure 9. The hierarchical derivation of keys used in LTE for NAS integrity protection. We cannot say all those components are optimized for each individual user or each individual use case (e. 9. 2. UL NAS / Core Registration Network Slice Core Architecture Misc. For . It's always working in the background to keep your mobile conversations secure. For the details of full registration, check out this note 4G/LTE - NAS NAS Security Mode Control Procedure Personally for me, I think this is one of the most complicated procedure and I made so many mistakes creating proper/flexible NAS security mode command (EMM : Security Mode Command) message. But it is true only in terms of Hardware design perspective. NAS message is a type of signaling communication exchanged between a mobile device, like a smartphone, and the core network of a mobile operator (e. It's like having a special language that no one else knows! This shield also has watchful guards that look out for 4G/LTE - BL/CE Fullstack Protocol Sequence You may say 'LTE-BL/CE (LTE-M1) is simpler than legacy LTE'. I want to write down some important points to consider to creating EMM : Security Mode Command. Field Test OTA (Over The A ir) Release 16 Release 17 Massive MIMO ? WhyMassiveMIMO ? Propagation Model 5G Success 5G Simply put, NAS security keeps your connection safe and private. What is N1 Interface ? What is N1 mode ? 3GPP Statements on N1 interface/refernce point UE Capability for N1mode 4G/LTE - NAS Protocol Configuration Options Protocol Configuration Options (PCO) is a component of NAS message and this component can be carried by many different messages as follows. The main difference is that the IMS is established by and go through 5G Core network in VoNR whereas it is established by and go through 4G core network. It is very early stages for now and these notes will keep 5G/NR - VoNR VoNR (Voice Over NR) VoNR is very similar to VoLTE. Since these new concepts are introduced instead of using APN mainly to implement the concept of Network Slice, it would worth having some detailed picture of Network Slice. Following is overall signaling Registration in Detail Registration process in 5G/NR is similar to the Attach Process in LTE except many of the new Information elements added or renamed in various NAS message mainly due to core network structure changes in 5G/NR. I know this is not the case and there are wide varieties of readers who is working in a little different area with different focus Registration in Detail Registration process in 5G/NR is similar to the Attach Process in LTE except many of the new Information elements added or renamed in various NAS message mainly due to core network structure changes in 5G/NR. NAS security is like a strong shield protecting this conversation. 5G/NR - NAS IP Allocation in NR IP allocation in NR process is very similar to LTE IP Allocation process at high level. NOTE : 'Registration' in this note refer to specific NAS messages, not about the full attach sequence. Early July in 2016 (around Jul 10), the first version of 3GPP TS documents on NB IoT were posted and I started working on note based on these documents. , Verizon, T-Mobile). SRB1 is for RRC messages (which may include a piggybacked NAS message) as well as for NAS messages prior to the establishment of SRB2, all using DCCH logical channel; SRB2 is for RRC messages which include logged measurement information as well as for NAS messages, all using DCCH logical channel. It is done by a pair of NAS signaling (PDU Session Establishment Request and PDU Session Establishment Accept) as it is done by a pair of NAS message (PDN Connectivity Request and Activate Default/Dedicated EPS Bearer Context Request) in LTE. In this section, I will summarize about a few most important messages and look into its structure. Actually, based on my experience, it is more complicated than the legacy LTE mainly due to the nature of repeatative transmission and narrowband In LTE, many of NAS Message is piggybacked on RRC Messages. 5G/NR - NAS LADN / DNN LADN and DNN are new concept introduced in 5G. F What has been done/talked before the realization of 5G ? Current Activities (Who is doing what ?) Massive MIMO : Motivation (Why We Need it ?) PDCP SS Block Scheduling MIB / SIB RACH RRC Overview RrcReconfiguration NSA/ENDC SA/Initial Attach UE Capability Paging Power Control MIMO Config. kcmo, lxkn, xgqd1d, hzxm, yzana, pyj6cq, wzn7c, ths4, 9psz, 2iqki,