68 lines
1.4 KiB
C++
68 lines
1.4 KiB
C++
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#ifndef LIMERIC_BUDGET_HPP_RQYL16AG
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#define LIMERIC_BUDGET_HPP_RQYL16AG
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#include <vanetza/common/clock.hpp>
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namespace vanetza
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{
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// forward declaration
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class Runtime;
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namespace dcc
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{
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// forward declaration
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class DutyCyclePermit;
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/**
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* LimericBudget models Annex B of TS 102 687 v1.2.1, i.e.
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* packet handling to meet the channel occupancy limit
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*/
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class LimericBudget
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{
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public:
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LimericBudget(const DutyCyclePermit&, const Runtime&);
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/**
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* Get delay until next transmission is allowed
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* \return remaining transmission delay
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*/
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Clock::duration delay();
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/**
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* Get current interval between transmissions
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* \return transmission interval
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*/
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Clock::duration interval();
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/**
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* Notify budget about transmission activity
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* \param tx_on over-the-air duration of transmission
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*/
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void notify(Clock::duration tx_on);
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/**
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* Recalculate current transmission interval.
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*
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* Transmission interval is derived from Limeric's current permitted duty cycle.
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* Hence, this method should be called whenever Limeric changes its duty cycle.
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*/
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void update();
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private:
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Clock::duration clamp_interval(Clock::duration) const;
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const DutyCyclePermit& m_duty_cycle_permit;
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const Runtime& m_runtime;
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Clock::duration m_interval;
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Clock::time_point m_tx_start;
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Clock::duration m_tx_on;
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};
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} // namespace dcc
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} // namespace vanetza
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#endif /* LIMERIC_BUDGET_HPP_RQYL16AG */
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