---
# System prepended metadata

title: O-RAN.WG7.DSC.0-v02.00
tags: [Spec]

---

# O-RAN.WG7.DSC.0-v02.00
###### tags: `Spec`

## Deployment Scenarios and Base Station Classes

* Deploy Scenarios
```txt
eMBB
URLLC
```
* Base Station Architecture: Background
    * Split Architecture
    * Integrated architecture

## Split Architecture

![Split Architecture](https://i.imgur.com/Fli9kUj.png)
 
    * Note that the term optional is used to indicate there may be a deployment case where a switch or FHGW may not be needed 
    * O-CU shall be located at the data center and O-DU can be placed either at the data center or at the cell site
    
* following three criteria
```txt
* O-RAN WG4 (open fronthaul interface group) released interfaces
* O-RAN approved publicly (e.g., small cell forum or etc.) available external interfaces
* Fronthaul interfaces made available and published as part of an O-RAN approved WG7 reference design
```
* associated terminologies will be used throughout all WG7 specifications
    * O-DU~7-2~ &harr; FHGW~7-2→8~ &harr; O-RU~8~
* where the fronthaul gateway does not perform a protocol translation
    * O-DU~6~ &harr; FHGW~6~ &harr; O-RU~6~
    * O-DU~7-2~ &harr; FHGW~7-2~ &harr; O-RU~7-2~
    * O-DU~8~ &harr; FHGW~8~ &harr; O-RU~8~
(split finction is in wg4)
* split function
    * Split option 6 
        * All PHY functions will reside in O-RU~x~ while MAC functions will be performed in O-DU~x~. In other words, only un-coded user data is on FH. In this case the terminology O-DU~6~ and O-RU~6~ is used.
    * Split option 7-2
        *  the PHY is split into High and Low PHY functions where High PHY functions (coding, rate matching, scrambling, modulations and layer mapping) are performed in O-DU~x~ while O-RU~x~ performs the Low PHY functions (precoding, remapping, digital beamforming, IFFT and CP insertion). All I/Q samples are in frequency domain. In this case the terminology O-DU~7-2~ and O-RU~7-2` is used
    * split option 8
        * All PHY functions are performed in O-DUx. This means that O-RU~x~ function is limited to RF to baseband conversion and vice versa. The I/Q samples on FH interface are in time domain. In this case the terminology O-DU~8~ and O-RU8 is used.
        
![integrated Architecture](https://i.imgur.com/E5ThO28.png)

## Deployment Scenarios

### Indoor Picocell

![Indoor Picocell](https://i.imgur.com/7xW96pF.png)

### Outdoor Picocell

![Outdoor Picocell](https://i.imgur.com/AUXMuxp.png)

![Outdoor Picocell](https://i.imgur.com/OXT9FTZ.png)

### Outdoor Microcell

![](https://i.imgur.com/ieZrKIR.png)

![](https://i.imgur.com/0MAmhgL.png)

### Integrated access and backhaul (IAB)

![](https://i.imgur.com/NELlR3b.png)

![](https://i.imgur.com/ttrm5t2.png)

### Outdoor Macrocell

![](https://i.imgur.com/we0HoIL.png)

## Base Station Type Classification

![](https://i.imgur.com/Rh85KDD.png)

### Indoor
#### split function
![](https://i.imgur.com/SXfIIKg.png)
#### The integrated architecture
![](https://i.imgur.com/smq0XRd.png)

### Outdoor
#### Picocell
![](https://i.imgur.com/ahiWgOO.png)
#### Microcell
![](https://i.imgur.com/05cNaAZ.png)
![](https://i.imgur.com/mtueYBk.png)

### Integrated access and backhaul (IAB)
![](https://i.imgur.com/eBcF3gj.png)
#### Macrocell
![](https://i.imgur.com/LBO0D47.png)


### Key performance indicators
#### peak data rate
![](https://i.imgur.com/NrAP9nu.png)
#### Peak spectral efficiency
* Peak spectral efficiency (bps/Hz) = Peak data rate (bps)/ bandwidth (Hz).
![](https://i.imgur.com/ERLxv9r.png)
#### Bandwidth
![](https://i.imgur.com/jiDUFNg.png)
#### Control plane latency
![](https://i.imgur.com/rpzUGWO.png)
#### User plane latency
![](https://i.imgur.com/9ZIGfT8.png)
#### Mobility
![](https://i.imgur.com/zGUZq84.png)
