Standard RLC Default RLC mode Supports both acknowledged (AM) and unacknowledged (UM) modes Has limited configuration options Provides basic reliability and throughputOptional RLC Advanced RLC mode Supports enhanced features such as: Segmentation and concatenation (SDU)

Divides large data into smaller fragments and concatenates them at the receiver

Dynamic window adaptation

Adjusts the transmission window size based on network conditions

Reordering and duplicate detection

Ensures data is delivered in the correct order and eliminates duplicate packets Requires more configuration than Standard RLC Provides improved reliability, throughput, and flexibility

Key Differences

| Feature | Standard RLC | Optional RLC

---|---|---

Acknowledgment | AM/UM | AM

SDU support | No | Yes

Window adaptation | No | Yes

Reordering detection | No | Yes

Duplicate detection | No | Yes

Configuration | Limited | Extensive

Reliability | Basic | Enhanced

Throughput | Lower | Higher

Flexibility | Limited | Improved |

When to use: Use Standard RLC for simple applications with low reliability and throughput requirements.* Use Optional RLC for applications that require enhanced reliability, throughput, and flexibility, such as voice, video, and enterprise data transmissions. Flag for review