added spec changes per open-telemetry#1647

specification/trace/semantic_conventions/span-general.md

@@ -41,7 +41,25 @@ the `net.peer.*` properties of a client are equal to the `net.host.*` properties
 | `net.host.ip` | string | Like `net.peer.ip` but for the host IP. Useful in case of a multi-IP host. | `192.168.0.1` | No |
 | `net.host.port` | int | Like `net.peer.port` but for the host port. | `35555` | No |
 | `net.host.name` | string | Local hostname or similar, see note below. | `localhost` | No |
-
+| `net.host.connection_type` | string | The current network connection type in common terms | `wifi` | No |
+| `net.host.carrier.name` | string | Name of the mobile carrier. | `sprint` | No |
+| `net.host.carrier.mcc` | string | [Mobile country code](https://en.wikipedia.org/wiki/Mobile_country_code) | `310` | No | 
+| `net.host.carrier.mnc` | string | [Mobile network code](https://en.wikipedia.org/wiki/Mobile_country_code) | `001` | No |
+| `net.host.carrier.icc` | string | [ISO country code (two character)](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) | `DE` | No |
+
+`net.host.connection_type` SHOULD be one of the following : 
+
+| Value | Description |
+| --- | --- |
+| `wifi` | connected via wifi | 
+| `1G` |  connected via a first gen cellular technology, such as `AMPS` or equivalent | 
+| `2G` | connected via a second gen cellular technology, such as `GPRS` |
+| `3G` | connected via a third gen cellular technology, such as `UMTS` or `1xEV-DO` | 
+| `4G` | connected via a fourth gen cellular technology, such as `eHRPD` or `LTE` |
+| `5G` | connected via a fifth gen cellular technology, such as `5G NR` | 
+| `unavailable` | network is disconnected or unavailable. | 
+
+
 `net.transport` MUST be one of the following:
 
 | Value  | Description |