# Usage Data — Platform 1.0 → 2.0

> For the complete documentation index, see [llms.txt](https://help.1nce.com/llms.txt).

# Usage Data: Platform 1.0 → 2.0

A **usage record** represents a single data-consumption session or SMS activity for a SIM.

## Summary of changes

The upgrade from the 1NCE Platform 1.0 usage stream to Data Streamer 2.0 is **minimal**. Both use the same structure and identical data types. The only changes are:

- One field is **renamed** (`session_id` → `ipcan_session_id`).
- Two fields are **new** (`quota_id`, `rat_type`).
- One field is **retired** (`currency_id` — the currency is fixed to EUR for 1NCE).

## What stays the same

The following fields are identical in name, type, and meaning:

| Group | Fields |
| --- | --- |
| Identifiers | `id`, `ingestion_timestamp` |
| Session window | `start_timestamp`, `end_timestamp` |
| Device | `endpoint_id`, `endpoint_imei`, `endpoint_ip_address`, `endpoint_name`, `endpoint_tags` |
| SIM | `sim_id`, `imsi_id` |
| Operator | `operator_id`, `operator_country_id`, `operator_mnc` |
| Organization | `organisation_id` |
| Tariff | `tariff_id`, `tariff_ratezone_id` |
| Traffic | `traffic_type_id` (5 = Data, 6 = SMS) |
| Volumes | `volume_rx`, `volume_tx`, `volume_total` |
| Cost | `cost` |

## Fields that are renamed

| 1NCE Platform 1.0 field | Data Streamer 2.0 field | What it contains |
| --- | --- | --- |
| `session_id` | `ipcan_session_id` | Session identifier (UUID) correlating usage with event records |

The data content is identical — only the field name changes. "IP-CAN" (IP Connectivity Access Network) is the standard telecom term for this session concept.

## Fields that are new

| New field | What it contains |
| --- | --- |
| `quota_id` | Quota plan identifier active at time of consumption |
| `rat_type` | Radio Access Technology ID (resolve via `GET /rat_types`) |

### RAT type values

| ID | Technology |
| --- | --- |
| 1 | 3G |
| 2 | 2G |
| 3 | WLAN |
| 4 | GAN |
| 5 | HSPA+ |
| 6 | 4G |
| 8 | NB-IoT |
| 9 | LTE-M |
| 10 | 5G |

## Fields that are retired

| Retired field | What it contains | Notes |
| --- | --- | --- |
| `currency_id` | Currency identifier | Not exposed in Data Streamer 2.0 — the currency is fixed to EUR for 1NCE |

## Practical impact

- **Field rename:** update any code or query referencing `session_id` to use `ipcan_session_id`. The format and content are identical.
- **New capabilities:** `rat_type` enables filtering and reporting by network technology; `quota_id` links usage to specific quota allocations.
- **Currency:** if you read `currency_id`, remove the dependency — all 1NCE costs are in EUR.
- Resolve IDs to names via the [Reference Data (v2 API)](/platform-migration/data-streamer/reference-data-api/) endpoints.