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Jonathan Hui 5bd05a573b [nexus] dynamically sync radio range circles with simulator parameters (#12987)
This commit exposes radio model parameters (path loss constant,
exponent, and sensitivity) and the minimum link request margin from
the Nexus simulator backend to the frontend.

Changes in backend:
- Expose constants in `RadioModel` and `Radio`.
- Add `GetRadioParameters` RPC to `simulation.proto` and implement it
  in gRPC and WASM bindings.
- Expose `OPENTHREAD_CONFIG_MLE_LINK_REQUEST_MARGIN_MIN` and
  `OPENTHREAD_CONFIG_MLE_PARTITION_MERGE_MARGIN_MIN` via the new RPC.

Changes in config:
- Set `OPENTHREAD_CONFIG_MLE_LINK_REQUEST_MARGIN_MIN` and
  `OPENTHREAD_CONFIG_MLE_PARTITION_MERGE_MARGIN_MIN` to 5 dB in
  `openthread-core-nexus-config.h`.

This allows the frontend to calculate and render circles dynamically.
2026-04-27 22:27:36 -07:00

76 lines
2.7 KiB
C++

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#ifndef OT_NEXUS_PLATFORM_NEXUS_RADIO_MODEL_HPP_
#define OT_NEXUS_PLATFORM_NEXUS_RADIO_MODEL_HPP_
#include <stdint.h>
namespace ot {
namespace Nexus {
class Node;
/**
* This class implements a radio model for RSSI calculation.
*
*/
class RadioModel
{
public:
static constexpr double kPathLossConstant = 40.0;
static constexpr double kPathLossExponent = 20.0;
RadioModel(void) = delete;
/**
* This static method calculates the RSSI between two nodes based on their distance.
*
* @param[in] aTxNode The transmitter node.
* @param[in] aRxNode The receiver node.
*
* @returns The calculated RSSI in dBm.
*/
static int16_t CalculateRssi(const Node &aTxNode, const Node &aRxNode);
/**
* This static method determines if a packet should be dropped based on its RSSI.
*
* @param[in] aRssi The RSSI of the packet.
*
* @retval true if the packet should be dropped.
* @retval false if the packet should not be dropped.
*/
static bool ShouldDropPacket(int16_t aRssi);
};
} // namespace Nexus
} // namespace ot
#endif // OT_NEXUS_PLATFORM_NEXUS_RADIO_MODEL_HPP_