Bugzilla – Bug 866
WiMAX mobility models not aggregated to Node
Last modified: 2010-04-11 15:39:33 EDT
Mobility models in WiMAX are added to the Phy, not to the node, and they are not aggregated. in wimax-phy.h, there is: /** * \return the mobility model of the device */ virtual Ptr<Object> GetMobility (void); /** * \brief set the mobility model of the device * \param mobility the mobility model to set */ virtual void SetMobility (Ptr<Object> mobility); and the examples/wimax/wimax-multicast.cc adds mobility this way. Unfortunately, this does not work since Object::DoStart() is never called and so the nodes do not move.
Created attachment 817 [details] patch to fix wimax-multicast example This patch will fix wimax-multicast.cc example. However, there is more to this because the channel needs to find these new aggregated mobility models.
Created attachment 818 [details] patch to try to fix simple-ofdm-wimax-channel This patch tries to use the aggregated mobility models. However, this patch leads to a problem. There is a runtime assertion in the buffer deserialization (maybe a packet without a proper header was received?). assert failed. file=../src/common/buffer.h, line=707, cond="m_current >= m_dataStart && m_current <= m_dataEnd" (gdb) bt #0 0x00007ffff72d9960 in ns3::Buffer::Iterator::ReadU8 (this=0x7ffffffe6af0) at ../src/common/buffer.h:706 #1 0x00007ffff79a07cf in ns3::GenericMacHeader::Deserialize (this= 0x7ffffffe6f00, start=...) at ../src/devices/wimax/wimax-mac-header.cc:271 #2 0x00007ffff72fcd15 in ns3::Packet::RemoveHeader (this=0x820e10, header=...) at ../src/common/packet.cc:264 #3 0x00007ffff7995d60 in ns3::SubscriberStationNetDevice::DoReceive (this= 0x7b4120, packet=...) at ../src/devices/wimax/ss-net-device.cc:742 #4 0x00007ffff796dffe in ns3::WimaxNetDevice::Receive (this=0x7b4120, burst= ...) at ../src/devices/wimax/wimax-net-device.cc:528 #5 0x00007ffff7975f55 in ns3::MemPtrCallbackImpl<ns3::WimaxNetDevice*, void (ns3::WimaxNetDevice::*)(ns3::Ptr<ns3::PacketBurst const>), void, ns3::Ptr<ns3::PacketBurst const>, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty>::operator() (this=0x7b4d40, a1=...) at debug/ns3/callback.h:223 #6 0x00007ffff79bd16c in ns3::Callback<void, ns3::Ptr<ns3::PacketBurst const>, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty>::operator() (this=0x7ffffffe76c0, a1=...) at debug/ns3/callback.h:410 #7 0x00007ffff79b85e8 in ns3::SimpleOfdmWimaxPhy::EndReceive (this=0x7960d0, burst=...) at ../src/devices/wimax/simple-ofdm-wimax-phy.cc:464 To reproduce this, you should be able to apply these two patches in the tracker and try to run wimax-multicast
Created attachment 824 [details] This patch fixes the bug. It includes the two previous patches. This patch fixes the bug. It includes the two previous patches.
The patch is not yet pushed to ns-3-dev.