# Link capacity estimation (smart data link)

Source: [https://docs.qualcomm.com/doc/80-PK177-134/topic/latency_capacity_estimation.html](https://docs.qualcomm.com/doc/80-PK177-134/topic/latency_capacity_estimation.html)

Link capacity esitmation (LCE) provides uplink and downlink capacity estimations. It
    provides estimated capacity that can be available based on the current used data rate. These
    APIs are part of smart data link.

## Overview 

The LCE subsystem provides access to the following two types of reporting:

- Threshold-based reporting: Reports are sent for uplink and downlink capacity estimation reaches a threshold and after the hysteresis timer expires. In the special case of a single threshold value, for either uplink or downlink, reports are sent at periodic intervals.
- Period-based reporting: Reports are sent at a set time interval.

## Notes

- Only one type of reporting can be set for a single session.
- LCE callbacks stop when the screen is off.
- It is most suitable for non-buffered use cases.

- **[LCE subsystem APIs](https://docs.qualcomm.com/doc/80-PK177-134/topic/lce_functions.html)**
- **[LCE subsystem callback interfaces](https://docs.qualcomm.com/doc/80-PK177-134/topic/lce_callback_interfaces.html)**
- **[LCE enumerations](https://docs.qualcomm.com/doc/80-PK177-134/topic/lce_enums.html)**
- **[Example code](https://docs.qualcomm.com/doc/80-PK177-134/topic/lce_example_code.html)**

**Parent Topic:** [Modem API](https://docs.qualcomm.com/doc/80-PK177-134/topic/modem.html)

Last Published: Nov 14, 2024

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