64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
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#ifndef DCC_MCO_FIELD_HPP_RLZ4PQMF
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#define DCC_MCO_FIELD_HPP_RLZ4PQMF
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#include <vanetza/common/bit_number.hpp>
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#include <vanetza/dcc/channel_load.hpp>
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#include <cstdint>
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namespace vanetza
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{
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namespace geonet
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{
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/**
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* DCC-MCO (Multi Channel Operations) was introduced by TS 102 636-4-2 V1.1.1 and is carried
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* forward unchanged by TS 103 836-4-2 V2.1.1 clause 6.3.3 Table 3 (Release 2): Octet 40
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* CBR_L_0_Hop = floor(CBR_L_0_Hop x 255), Octet 41 CBR_L_1_Hop likewise, Octet 42 bits 0-4 TX
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* power [0;31] dBm, Octet 43 reserved. This field layout was cross-checked bit-for-bit against
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* the current V2.1.1 text; only this docstring's citation was stale.
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* DccMcoField implements the SHB header field extension.
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*/
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class DccMcoField
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{
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public:
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using ChannelLoad = dcc::ChannelLoad;
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DccMcoField();
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// copy operations
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DccMcoField(const DccMcoField&) = default;
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DccMcoField& operator=(const DccMcoField&) = default;
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// conversion from/to 4 bytes (host byte order)
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explicit DccMcoField(uint32_t);
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DccMcoField& operator=(uint32_t);
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explicit operator uint32_t() const;
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void local_cbr(const ChannelLoad&);
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ChannelLoad local_cbr() const;
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void neighbour_cbr(const ChannelLoad&);
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ChannelLoad neighbour_cbr() const;
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/**
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* Output power of packet transmission
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* \return [0; 31] dBm (values are cramped at limits)
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*/
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void output_power(unsigned dbm);
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unsigned output_power() const;
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private:
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using cbr_type = uint8_t;
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using power_type = BitNumber<unsigned, 5>;
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cbr_type m_cbr_l0_hop; /*< local CBR measurement */
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cbr_type m_cbr_l1_hop; /*< maximum CBR measurement from 1-hop neighbours */
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power_type m_output_power; /*< output power of packet transmission */
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};
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} // namespace geonet
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} // namespace vanetza
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#endif /* DCC_MCO_FIELD_HPP_RLZ4PQMF */
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