SW
4×
① LTE-SW5001 — Multi-PLMN Support MANDATORY
Tells the eNB to broadcast multiple operator PLMN IDs (up to 6) in SIB1 and route each UE's signaling to the right MME by the UE-selected PLMN. Without it, LTE MOCN does not work.
UE reads SIB1 → selects PLMN → eNB routes S1 to that MMES1-flex
selected PLMN drives S1 routing
Parameters
| MO | Parameter | Range | Meaning |
|---|---|---|---|
| [ENB] enb-plmn-info | plmn-index | 0..5 | PLMN slot (index 0 = anchor) |
| [ENB] enb-plmn-info | mcc / mnc | 3 / 2–3 digits | Operator identity |
| [ENB] cell-plmn-info | plmn-index | 0..5 | Which PLMN, per cell |
| [ENB] cell-plmn-info | plmn-usage | use / no_use | Does this cell serve that PLMN |
Counters
Samsung verbatim: "no specific counters or KPIs". Monitor via derived RRC-Setup / registration success filtered by selectedPLMN.
Optimization technique
Set
plmn-index 0 = global eNB-ID PLMN (anchor); list order = priority; in MORAN mark the owner PLMN reserved-for-operator-use in the sharing carrier's cells so it stays visible for ANR but bars foreign UEs. Solutions — SW5001 faults
| Symptom | Cause | Fix |
|---|---|---|
| Op A registration fails | plmn-index 0 ≠ global eNB ID | Make plmn-index 0 match the global eNB-ID PLMN |
| Op B "PLMN not allowed" | cell-plmn-info missing plmn-usage=use (idx 1) | Set plmn-usage = use for index 1 |
| Op B can't register | MME-B unreachable | Verify S1-MME to MME-B |
② LTE-SW5002 — Flexible Radio Resource Configuration PRB SHARING
Splits PRBs between operators per a sharing model (4 models, 1% granularity, up to 6 operators). MinDRR is the guaranteed floor, MaxDRR the cap; the common pool = 100 − Σ(MaxDRR). License-controlled from SLR4.5+.
Scheduler: MinDRR floors → common pool by ratio → MaxDRR capnetwork-share-info
per-PLMN PRB4 models: Full · Strict · Partial · Adaptive
Parameters — [ENB] network-share-info
| Parameter | Meaning | Range |
|---|---|---|
| plmn0-portion … plmn5-portion | MaxDRR per PLMN | 0..100 % |
| plmn0-portion-min … plmn5-portion-min | MinDRR per PLMN | 0..100 % |
| common-sharing-portion | Common pool (100 − Σ MaxDRR) | 0..100 % |
Counters / KPIs
PRB usage per PLMN (Used ÷ Total, target ≤ MaxDRR%) and common pool usage. Sustained 100% on a PLMN → portion-starved.
Optimization technique
Pick the model by traffic (Partial 40/40/20 is the production default); keep ~10% common; Σ(MaxDRR) ≤ 100 (Strict = 100, applied to all at once). Set MaxDRR to SLA, MinDRR to the floor.
Solutions — SW5002 faults
| Symptom | Cause | Fix |
|---|---|---|
| Op A throughput drops when Op B loads | Σ(MaxDRR) too high → no common pool | Reduce MaxDRR ≤ 90 %; leave 10 % common |
| Cannot enable LTE-SW5002 | FGR-RS1201/RS1202 (LTE-NR DSS) ON | Disable LTE-NR spectrum sharing first |
| NB-IoT PRB not in per-PLMN sharing | Documented behaviour | Expected — NB-IoT excluded; eMTC = common |
③ LTE-SW5004 — Frequency Relocation Handover MOBILITY
Supports inter-PLMN handover and frequency relocation when a shared eNB hosts operators with different carrier configs — including Owner-PLMN ⟷ Sharing-PLMN moves in MORAN. Leans on SW5001 for the PLMN framework and ANR for cross-operator neighbour discovery.
Shared cell → inter-PLMN HO → operator's target carrier+ ANR
HO to operator carrier ANR builds the NRT
Parameters (mobility set — configured per PLMN via MC-style report config)
| Parameter | Range | Default | Role |
|---|---|---|---|
| a3-offset | −30…30 | 4 | Neighbour-better trigger for HO |
| a5-threshold1/2-rsrp | 0…127 | 51 | Serving-poor / neighbour-good thresholds |
| sa-frequency-priority | 0…31 | 0 | Per-PLMN target-frequency priority |
| cell-individual-offset / ANR | NRT | — | Cross-operator neighbour relations |
Counters / KPIs
Inter-PLMN HO Success Rate (success ÷ attempts, target ≥ 99 %), per PLMN.
Optimization technique
Give each PLMN its own frequency priority so its UEs relocate to that operator's carrier; ensure the owner PLMN is broadcast in the sharing carrier so ANR can build the cross-operator NRT.
Solutions — SW5004 faults
| Symptom | Cause | Fix |
|---|---|---|
| ANR doesn't find cross-operator neighbours | Owner PLMN not broadcast in sharing carrier | Include owner PLMN for ANR/SON purposes |
| HO to a carrier the operator doesn't run | Wrong per-PLMN frequency priority | Set that PLMN's sa-frequency-priority correctly |
④ LTE-SW5012 — Operator-Specific Feature Activation PER-PLMN CAC
Enables per-operator feature activation, most importantly per-PLMN Call Admission Control — each operator gets its own UE / bearer / PRB caps, scaled by its share. Requires SW5002 enabled first.
Per-PLMN CAC gate — caps scaled by each operator's sharerequires SW5002
admit within capSamsung: 20 MHz @ 40 % → 240 UE / 480 bearer
Parameters — what per-PLMN CAC gates (verbatim, 40% example)
| Resource | Per-PLMN limit | Op A @ 40 % |
|---|---|---|
| PRB | 100 PRB × T × share / cycle | 40 PRB / cycle |
| Active UEs | 600 × share (per cell) | 240 UEs |
| Active Bearers | 1200 × share | 480 bearers |
Counters / KPIs
Active UE / bearer per PLMN (target ≤ cell × MaxDRR). CAC blocking while total usage is low = a per-PLMN cap hit.
Optimization technique
Size each operator's caps to cell capacity × MaxDRR; if a PLMN blocks new UEs while the cell is under-loaded, either raise its MaxDRR or move to Adaptive Sharing so it can borrow the common pool.
Solutions — SW5012 faults
| Symptom | Cause | Fix |
|---|---|---|
| Per-PLMN CAC not working | LTE-SW5002 not enabled | Enable SW5002 first (prerequisite) |
| New UEs blocked despite low total usage | Per-PLMN UE/bearer cap reached | Raise MaxDRR or use Adaptive Sharing |
Four features, one shared LTE cell — identity, PRBs, mobility, admission.
SW5001 broadcasts & routes, SW5002 splits the PRBs, SW5004 moves UEs to the right carrier, SW5012 admits each operator within its share. Configure in that order, verify per-PLMN, trial per Day 6.