[Ns-developers] Extending WifiHelper object

[Mirko Banchi]

Hi Mathieu,

As you told me, i'm extending WifiHelper class in order to make easy
setting of Msdu aggregators and also Edca parameters (minCw, maxCW ...)
for each Qos station's queue. The discussed solution is the following:


class WifiMacHelper
{
public:
  virtual Ptr<WifiMac> Create (void) const = 0;
};

class NqosWifiMacHelper : public WifiMacHelper
{
  virtual Ptr<WifiMac> Create (void) const;
  void SetType (std::string,
                std::string n0, const AttributeValue &v0,
                ...);
  void SetDcaParameter (?);
};

class QosWifiMacHelper : public WifiMacHelper
{
  virtual Ptr<WifiMac> Create (void) const;
  void SetType (std::string,
                std::string n0, const AttributeValue &v0,
                ...);
  void SetMsduAggregatorForAc (AccessClass ac, std::string type,
                               std::string n0, const AttributeValue &v0
                               ,...);
  void SetEdcaParameterForAc (?);
};

class WifiHelper
{
  ...
  NetDeviceContainer Install (const WifiPhyHelper &phy,
                              const WifiMacHelper &mac,
                              NodeContainer c) const;
};

As you can see the main problems are with parameter list of

NqosWifiMacHelper::SetDcaParameter
QosWifiMacHelper::SetEdcaParameter

Which kind of parameter we should use?

Even if ns3::EdcaTxopN has attributes like "MinCw", "MaxCw" etc, when
SetEdcaParameter is called i haven't in hand the pointer to the specific
queue yet.

The problem is how to map a value to a specific attribute

Thank you

Mirko

-- 
Mirko Banchi

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