EPC+ Core Optimization for 5G NSA
Option 3 / 3a / 3x

Verbatim — CloudUSN → Solutions → NSA → NSA Overview.

The three NSA phases

Switch between option 3 / 3a / 3x and watch the S1-U tunnels, the split anchor and the downlink user plane change. Topology, tunnel count and split behaviour are transcribed from Huawei NSA Solution Architecture; the description under the canvas is the verbatim HedEx paragraph for the selected option.

Verbatim — “Table 1 Comparison of option 3/3a/3x”. Data splitting anchor, splitting process, and networking advantages & disadvantages, exactly as Huawei states them.

Verbatim — CloudUSN → Solutions → NSA → Appendix → MR-DC.

Verbatim — “Table 1 CloudUSN features” from the NSA appendix. Feature ID → functions provided.

Feature descriptions — verbatim

Verbatim. “Compared with the LTE attach procedure, the 5G NSA attach procedure for UEs that support DCNR incorporates the NSA IEs in messages and transfer of 5G security parameters.” Each step description below is the exact HedEx paragraph for that step.

Message & IE detail for the selected step

As you step through the procedure above, this panel shows that step's verbatim Huawei message topic — the Message Function, the complete Associated IE table with 3GPP presence requirements, and a click-through to the full description of every IE.

Every mobility procedure Huawei documents for NSA, verbatim, each step opening its real message topic and full Associated-IE table. 48 steps across 5 procedures.

S1 Handover Procedure — 21 steps

Verbatim. “The S1 handover procedure in NSA architecture is similar to the LTE handover procedure. The only difference lies in NSA IEs and 5G security parameters, as well as the messages and IEs for NR data usage reporting. The following figure shows only the key steps in the S1 handover and TAU procedures and the steps closely related to NSA architecture.”

Message & IE detail for the selected S1 handover step

The other four mobility procedures

Mobility counters — verbatim

Mobility KPIs — verbatim formulas

Verbatim. “In the NSA architecture, NSA IEs and extended parameters are added to some existing messages. They vary with service procedures. The following table lists the new IEs and the procedures where these IEs are involved. The existing HSSs/MMEs/eNodeBs on the live network are upgraded to support 5G NSA features.”

The gNodeB carries the NR bytes; the EPC+ writes the CDR. These CloudUGW software parameters govern how that volume is measured, timestamped and reported — descriptions verbatim.

CloudUGW — Interworking Between LTE and 5G

The complete CloudUSN EPC signalling reference, verbatim: every message on every interface (S1-MME, S6a, S13, S10, S11, S5/S8, S2a/S2b, S3, S4, Gn, Gx, Gy, Sx/PFCP, RADIUS) with its Message Function, full Associated-IE table and 3GPP presence requirements — and every IE drillable to its own description.

The complete NSA bring-up as an executable pipeline. Run it, or click any stage. Each stage states what to do, the exact MML commands, the feature it belongs to, and why — quoted verbatim from the CloudUSN documentation.

Deployment Cockpit — “Deploying Basic NSA Services”, live on the topology

Huawei's own deployment task as a mission: press ▶ Deploy and watch each step light up the NE and interface it configures on the network map. Three phases — Configure CloudUSN (6 steps) · Configure CloudUGW/CGW (3 steps) · Verify (3 trace scenarios with animated expected-result checklists). Every task line, script, data-plan parameter and expected result is verbatim.

The activation and deactivation tasks as a live state machine. Flip the rocker, press ▶ Walk, and watch the feature move INACTIVE → ACTIVE step by step — while the five control points on the right flip in real time. Deactivation runs the exact mirror: every SET/ADD …=YES becomes a SET/MOD …=NO rollback. Task text, MML, required data and verification are verbatim from the two CloudUSN feature-operation topics.

Every NSA-relevant command on the CloudUSN, grouped by function: NSA control, S1 interface, gateway characteristics, GTP-C compatibility, DNS/host file, DECOR/DCN, MNO/MVNO and licence. Each carries its verbatim Function, a real MML example, and every parameter with value range, default and configuration notes.

All 103 NSA / DCNR / 5G software parameters across the CloudUSN and CloudUGW, sorted by Huawei's own Impact Level. Each shows Applicable NEs, Description, Value Description (range, recommended and initial value), Application Scenario, Impact on the System and Time to Take Effect — verbatim.

The verbatim task for WSFD-121401 UE Capability-based User Plane Selection, as a runnable 13-step task across CloudUSN and CloudUGW. Press ▶ Run task — each step shows its verbatim text, MML and its own slice of the 39-row data plan. Below, the animated +nc-nr DNS resolution that decides whether a gateway is high-speed at all.

The verbatim task for WSFD-110531 DECOR in Pool — “5G UE redirection to an appropriate MME”. 14 steps: plan the MME group, the UE Usage Type group, and the DCN mapping that steers a DCNR UE onto an NSA-capable MME while the pool is only partly upgraded.

Each KPI is transcribed from the HedEx counter reference — exact formula, exact counter IDs, exact unit and measured object. Filter by category, or search a counter ID to find which KPI consumes it.

The complete CloudUSN counter reference for the EPC: S1 mode MM, S1 mode SM, S1, S6a, GTPC, GTPU, SGs and CDR — 105 measurement units. Every counter carries its verbatim Description, Unit, Measurement Point (exactly when the MME increments it), Measurement Type and formula.

Huawei counts every reject per EMM/ESM cause code. This is the fastest path from “success rate dropped” to “which cause is rising, and where exactly does the MME count it”.

The complete CloudUSN troubleshooting set for LTE service faults and DNS query errors, verbatim. These are Huawei's own documented fault cases — symptom, possible causes and the exact MML procedure to rectify each one.

The complete MME/SGSN KPI library — Mobility management, Authentication, Session management, Traffic mode, CSFB, VoLTE and NB-IoT.

Every claim on this page resolves to a file inside a HedEx library on disk.