author | Andrey Mazo <mazo@iitp.ru> |
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child 6330 | af9c574246d5 |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2007,2008 INRIA |
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* 2009 TELEMATICS LAB, Politecnico di Bari |
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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: Giuseppe Piro <g.piro@poliba.it> |
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*/ |
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|
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/* BS outbound scheduler as per in Section 6.3.5.1 */ |
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|
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#ifndef BS_SCHEDULER_RTPS_H |
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#define BS_SCHEDULER_RTPS_H |
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#include <list> |
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#include "ns3/packet.h" |
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#include "wimax-phy.h" |
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#include "packet-burst.h" |
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#include "dl-mac-messages.h" |
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#include "bs-scheduler.h" |
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namespace ns3 { |
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class BaseStationNetDevice; |
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class GenericMacHeader; |
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class WimaxConnection; |
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class Cid; |
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/** |
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* \brief This class implements a simple downlink scheduler for rtPS flows. |
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* |
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* The DL-rtPS-Scheduler assigns the available bandwidth the service flows |
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* in the following order: IR Connections, Broadcast Connections, Basic and |
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* Primary Connections, UGS Connections, rtPS Connections, nrtPS Connections, |
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* BE Connections. |
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* The IR, Broadcast and Basic/Primary Connections must transmit |
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* all packet in the queue. The UGS flows can transmit the quota of date equal to |
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* the "Grant Size" (that is one of service flows QoS parameters) according to their |
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* requested MaxLatency (another QoS parameter). |
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* All rtPS flows are able to transmit all packet in the queue according to the available |
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* bandwidth. The bandwidth saturation control has been implemented to redistribute |
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*the effective available bandwidth to all rtPS flows that have at least one packet |
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* to transmit. The remaining bandwidth is allocated to rntPS and BE Connections. |
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*/ |
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class BSSchedulerRtps : public BSScheduler |
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{ |
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public: |
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BSSchedulerRtps (); |
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BSSchedulerRtps (Ptr<BaseStationNetDevice> bs); |
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~BSSchedulerRtps (void); |
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static TypeId GetTypeId (void); |
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/* |
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* \brief This function returns all the downlink bursts scheduled for the next |
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* downlink sub-frame |
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* \returns all the downlink bursts scheduled for the next downlink sub-frame |
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*/ |
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std::list<std::pair<OfdmDlMapIe*, Ptr<PacketBurst> > >* |
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GetDownlinkBursts (void) const; |
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/* |
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* \brief This function adds a downlink burst to the list of downlink bursts |
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* scheduled for the next downlink sub-frame |
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* \param connection a pointer to connection in wich the burst will be sent |
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* \param diuc downlink iuc |
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* \param modulationType the modulation type of the burst |
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* \param burst the downlink burst to add to the downlink sub frame |
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*/ |
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void AddDownlinkBurst (Ptr<const WimaxConnection> connection, uint8_t diuc, |
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WimaxPhy::ModulationType modulationType, Ptr<PacketBurst> burst); |
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/** |
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* \brief Schedule function. |
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*/ |
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void Schedule (void); |
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/** |
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* \brief Check for IR and Broadcast connections that have packets to transmit. |
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* \param connection will point to a initial ranging or broadcast connection |
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* wich have packets to transmit |
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* \returns false if no initial ranging or broadcast connection has packets |
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* to transmit, true otherwise |
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*/ |
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bool SelectIRandBCConnection (Ptr<WimaxConnection> &connection); |
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/** |
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* \brief Check for Basic and Primary connections that have packets to transmit. |
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* \param connection will point to a basic or primary connection |
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* wich have packets to transmit |
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* \returns false if no basic or primary connection has packets |
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* to transmit, true otherwise |
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*/ |
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bool SelectMenagementConnection (Ptr<WimaxConnection> &connection); |
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/** |
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* \brief Check for UGS connections that have packets to transmit. |
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* |
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* The method return the UGS connection that have packets to transmits, |
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* according to the MaxLatency specifications. |
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*/ |
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bool SelectUGSConnection (Ptr<WimaxConnection> &connection); |
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/** |
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* \brief Check for rtPS connections that have packets to transmit. |
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*/ |
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bool SelectRTPSConnection (Ptr<WimaxConnection> &connection); |
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/** |
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* \brief Check for nrtPS connections that have packets to transmit. |
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*/ |
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bool SelectNRTPSConnection (Ptr<WimaxConnection> &connection); |
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/** |
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* \brief Check for BE connections that have packets to transmit. |
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*/ |
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bool SelectBEConnection (Ptr<WimaxConnection> &connection); |
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/* |
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* \brief Selects a connection from the list of connections having packets to be sent . |
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* \param connection will point to a connection that have packets to be sent |
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* \returns false if no connection has packets to be sent, true otherwise |
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*/ |
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bool SelectConnection (Ptr<WimaxConnection> &connection); |
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/* |
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* \brief schedules the broadcast connections |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerBroadcastConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the IR connections |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerInitialRangingConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the basic connections |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerBasicConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the primary connection |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerPrimaryConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the UGS connection |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerUGSConnection (uint32_t &availableSymbols); |
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/** |
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* \brief Downlink Scheduler for rtPS connections. |
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* |
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* \param availableSymbols available symbols for rtPS flows |
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* |
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* This method represent the DL Scheduler for rtPS connections. |
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* The scheduler is designed to serve all rtPS connections that |
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* have at least one packet to transmit, every DL Subframe. |
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* To each rtPS connections are allocated, at the beginning, |
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* the bandwidth to transmit a quota of data equal to the |
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* queue length. |
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* If the sum of all pre-allocated bandwidth exceed the available |
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* symbols for rtPS connections, the Channel Saturation Control function |
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* is called to redistribute the available bandwidth. |
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*/ |
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void BSSchedulerRTPSConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the NRTPS connections |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerNRTPSConnection (uint32_t &availableSymbols); |
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/* |
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* \brief schedules the BE connection |
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* \param availableSymbols the remaining free OFDM symbols in the current subframe |
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*/ |
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void BSSchedulerBEConnection (uint32_t &availableSymbols); |
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/* |
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* \brief Creates a downlink UGS burst |
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* \param serviceFlow the service flow of the burst |
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* \param modulationType the modulation type to be used for the burst |
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* \param availableSymbols maximum number of OFDM symbols to be used by the burst |
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* \returns a Burst (list of packets) |
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*/ |
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Ptr<PacketBurst> CreateUgsBurst (ServiceFlow *serviceFlow, |
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WimaxPhy::ModulationType modulationType, uint32_t availableSymbols); |
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private: |
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std::list<std::pair<OfdmDlMapIe*, Ptr<PacketBurst> > > *m_downlinkBursts; |
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}; |
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} // namespace ns3 |
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#endif /* BS_SCHEDULER_RTPS_H */ |