171 lines
4.5 KiB
C++
171 lines
4.5 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Junling Bu <linlinjavaer@gmail.com>
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*/
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#include "channel-scheduler.h"
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#include "ns3/log.h"
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namespace ns3 {
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NS_LOG_COMPONENT_DEFINE ("ChannelScheduler");
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NS_OBJECT_ENSURE_REGISTERED (ChannelScheduler);
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/**
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* \brief Get the type ID.
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* \return the object TypeId
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*/
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TypeId
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ChannelScheduler::GetTypeId ()
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{
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static TypeId tid = TypeId ("ns3::ChannelScheduler")
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.SetParent<Object> ()
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.SetGroupName ("Wave")
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;
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return tid;
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}
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ChannelScheduler::ChannelScheduler ()
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{
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NS_LOG_FUNCTION (this);
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}
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ChannelScheduler::~ChannelScheduler ()
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{
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NS_LOG_FUNCTION (this);
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}
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void
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ChannelScheduler::DoInitialize ()
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{
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// assign default CCH access when the device is initialized
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AssignDefaultCchAccess ();
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}
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void
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ChannelScheduler::SetWaveNetDevice (Ptr<WaveNetDevice> device)
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{
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NS_LOG_FUNCTION (this << device);
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m_device = device;
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}
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bool
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ChannelScheduler::IsChannelAccessAssigned (uint32_t channelNumber) const
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{
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NS_LOG_FUNCTION (this << channelNumber);
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return (GetAssignedAccessType (channelNumber) != NoAccess);
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}
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bool
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ChannelScheduler::IsCchAccessAssigned () const
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{
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NS_LOG_FUNCTION (this);
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return (GetAssignedAccessType (CCH) != NoAccess);
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}
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bool
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ChannelScheduler::IsSchAccessAssigned () const
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{
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NS_LOG_FUNCTION (this);
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return (GetAssignedAccessType (SCH1) != NoAccess) || (GetAssignedAccessType (SCH2) != NoAccess)
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|| (GetAssignedAccessType (SCH3) != NoAccess) || (GetAssignedAccessType (SCH4) != NoAccess)
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|| (GetAssignedAccessType (SCH5) != NoAccess) || (GetAssignedAccessType (SCH6) != NoAccess);
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}
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bool
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ChannelScheduler::IsContinuousAccessAssigned (uint32_t channelNumber) const
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{
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NS_LOG_FUNCTION (this << channelNumber);
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return (GetAssignedAccessType (channelNumber) == ContinuousAccess);
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}
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bool
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ChannelScheduler::IsAlternatingAccessAssigned (uint32_t channelNumber) const
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{
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NS_LOG_FUNCTION (this << channelNumber);
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return (GetAssignedAccessType (channelNumber) == AlternatingAccess);
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}
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bool
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ChannelScheduler::IsExtendedAccessAssigned (uint32_t channelNumber) const
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{
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NS_LOG_FUNCTION (this << channelNumber);
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return (GetAssignedAccessType (channelNumber) == ExtendedAccess);
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}
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bool
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ChannelScheduler::IsDefaultCchAccessAssigned () const
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{
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NS_LOG_FUNCTION (this);
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return (GetAssignedAccessType (CCH) == DefaultCchAccess);
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}
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bool
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ChannelScheduler::StartSch (const SchInfo & schInfo)
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{
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NS_LOG_FUNCTION (this << &schInfo);
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uint32_t cn = schInfo.channelNumber;
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if (ChannelManager::IsCch (schInfo.channelNumber))
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{
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NS_LOG_DEBUG ("the channel access requirement for CCH is not allowed.");
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return false;
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}
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uint32_t extends = schInfo.extendedAccess;
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bool immediate = schInfo.immediateAccess;
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Ptr<OcbWifiMac> mac = m_device->GetMac (cn);
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for (EdcaParametersI i = schInfo.edcaParameters.begin (); i != schInfo.edcaParameters.end (); ++i)
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{
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EdcaParameter edca = i->second;
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mac->ConfigureEdca (edca.cwmin, edca.cwmax, edca.aifsn, i->first);
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}
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if (extends == EXTENDED_CONTINUOUS)
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{
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return AssignContinuousAccess (cn, immediate);
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}
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else if (extends == EXTENDED_ALTERNATING)
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{
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return AssignAlternatingAccess (cn, immediate);
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}
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else
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{
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return AssignExtendedAccess (cn, extends, immediate);
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}
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}
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bool
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ChannelScheduler::StopSch (uint32_t channelNumber)
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{
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NS_LOG_FUNCTION (this << channelNumber);
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if (ChannelManager::IsCch (channelNumber))
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{
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NS_LOG_DEBUG ("the channel access for CCH is not allowed to be released.");
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return false;
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}
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if (!IsChannelAccessAssigned (channelNumber))
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{
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NS_LOG_DEBUG ("the channel access for channel " << channelNumber << " has already been released.");
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return true;
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}
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return ReleaseAccess (channelNumber);
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}
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void
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ChannelScheduler::DoDispose ()
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{
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NS_LOG_FUNCTION (this);
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m_device = nullptr;
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}
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} // namespace ns3
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