he-ru.h

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/*
 * Copyright (c) 2018
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Stefano Avallone <stavallo@unina.it>
 */
 
#ifndef HE_RU_H
#define HE_RU_H
 
#include <cstdint>
#include <map>
#include <ostream>
#include <vector>
 
namespace ns3
{
 
class HeRu
{
  public:
    enum RuType
    {
        RU_26_TONE = 0,
        RU_52_TONE,
        RU_106_TONE,
        RU_242_TONE,
        RU_484_TONE,
        RU_996_TONE,
        RU_2x996_TONE
    };
 
    typedef std::pair<int16_t, int16_t> SubcarrierRange;
 
    typedef std::vector<SubcarrierRange> SubcarrierGroup;
 
    class RuSpec
    {
      public:
        RuSpec();
        RuSpec(RuType ruType, std::size_t index, bool primary80MHz);
 
        RuType GetRuType() const;
        std::size_t GetIndex() const;
        bool GetPrimary80MHz() const;
        std::size_t GetPhyIndex(uint16_t bw, uint8_t p20Index) const;
 
        bool operator==(const RuSpec& other) const;
        bool operator!=(const RuSpec& other) const;
        bool operator<(const RuSpec& other) const;
 
      private:
        RuType m_ruType;     
        std::size_t m_index; 
        bool m_primary80MHz; 
    };
 
    struct RuSpecCompare
    {
        RuSpecCompare(uint16_t channelWidth, uint8_t p20Index);
        bool operator()(const RuSpec& lhs, const RuSpec& rhs) const;
 
      private:
        uint16_t m_channelWidth; 
        uint8_t m_p20Index;      
    };
 
    static std::size_t GetNRus(uint16_t bw, RuType ruType);
 
    static std::vector<HeRu::RuSpec> GetRusOfType(uint16_t bw, HeRu::RuType ruType);
 
    static std::vector<HeRu::RuSpec> GetCentral26TonesRus(uint16_t bw, HeRu::RuType ruType);
 
    static SubcarrierGroup GetSubcarrierGroup(uint16_t bw, RuType ruType, std::size_t phyIndex);
 
    static bool DoesOverlap(uint16_t bw, RuSpec ru, const std::vector<RuSpec>& v);
 
    static bool DoesOverlap(uint16_t bw,
                            RuSpec ru,
                            const SubcarrierGroup& toneRanges,
                            uint8_t p20Index);
 
    static RuSpec FindOverlappingRu(uint16_t bw, RuSpec referenceRu, RuType searchedRuType);
 
    static uint16_t GetBandwidth(RuType ruType);
 
    static RuType GetRuType(uint16_t bandwidth);
 
    static RuType GetEqualSizedRusForStations(uint16_t bandwidth,
                                              std::size_t& nStations,
                                              std::size_t& nCentral26TonesRus);
 
    typedef std::pair<uint8_t, RuType> BwTonesPair;
 
    typedef std::map<BwTonesPair, std::vector<SubcarrierGroup>> SubcarrierGroups;
 
    static const SubcarrierGroups m_heRuSubcarrierGroups;
 
    using RuAllocationMap = std::map<uint8_t, std::vector<RuSpec>>;
 
    static const RuAllocationMap m_heRuAllocations;
 
    static std::vector<RuSpec> GetRuSpecs(uint8_t ruAllocation);
 
    static uint8_t GetEqualizedRuAllocation(RuType ruType, bool isOdd);
 
    static constexpr uint8_t EMPTY_242_TONE_RU = 113;
};
 
std::ostream& operator<<(std::ostream& os, const HeRu::RuType& ruType);
 
std::ostream& operator<<(std::ostream& os, const HeRu::RuSpec& ru);
 
} // namespace ns3
 
#endif /* HE_RU_H */