Block Error Rate (BLER) in 5G, also known as Block Error Ratio, is a metric used to quantify the reliability and quality of communication between the transmitter and receiver in a wireless network. It measures the ratio of erroneous blocks to the total number of blocks transmitted.
The calculation of BLER involves comparing the received blocks with the originally transmitted blocks. A block in this context refers to a set of bits transmitted as a single entity. Here’s a step-by-step explanation of how BLER is calculated in 5G:
- Transmission of Blocks: The transmitter sends a series of data blocks over the 5G channel to the receiver. Each block contains a predefined number of bits.
- Reception at the Receiver: The receiver receives these blocks, and its task is to correctly decode and interpret the information. However, due to various factors such as signal attenuation, noise, or interference, errors may occur during transmission.
- Error Detection: The receiver employs error detection mechanisms, such as cyclic redundancy check (CRC) or forward error correction (FEC), to identify blocks that have been received with errors.
- Counting Errors: Blocks with errors are counted, and this count is denoted as the number of erroneous blocks.
- Calculation of BLER: BLER is then calculated by dividing the number of erroneous blocks by the total number of blocks transmitted. The formula for BLER is expressed as a percentage:
����(%)=(Number of Erroneous BlocksTotal Number of Blocks)×100BLER(%)=(Total Number of BlocksNumber of Erroneous Blocks)×100
A lower BLER percentage indicates a higher level of reliability, meaning that a smaller proportion of transmitted blocks experienced errors. Conversely, a higher BLER percentage suggests a higher error rate and lower reliability in the communication link.
In summary, BLER is a crucial metric in 5G networks as it provides insights into the reliability of data transmission, helping network operators assess and optimize the performance of their systems.