Base Station Scheduler (4G/5G)

Base Station Scheduler (4G/5G)

Downlink scheduler in 4G/5G is responsible for dynamically controlling the device(s) and ensuring that fair number of resources in the base station are allocated across all the users in the vicinity of the base station and guarantee that all UEs getting a proportionally level of service.

Choice of the scheduler has a significant impact on network performance such as throughput, delay and fairness index.

Each of the scheduled devices is provided with a scheduling assignment including information on the set of time–frequency resources upon which the device’s DL-SCH is transmitted.

Scheduler depends on the specific scheduling strategy -
• Channel conditions at the device, including spatial domain properties.
• Buffer status of the different data flows.
• Priorities of the different data flows, including the amount of data pending retransmission.

Base station uses CSI reports to measure the channel quality in the time, frequency, and spatial domains.

To learn about 4G/5G RAN Engineering, refer to the course - https://www.itelcotech.com/learningpath/ran-engineer-4g-and-5g