multi channel - t @ wiki

NS-2によるマルチチャネルの実装

• 参考ページ
  • NS-2.29
  • http://www.cse.msu.edu/~wangbo1/ns2/nshowto8.html
  • NS-2.26
  • http://greenw.blogspot.com/2006/06/extend-ns2-to-support-multi-channle.html
  • やること
    • tcl/lib/ns-lib.tclの修正
    • tcl/lib/ns-mobilenode.tclの修正
  • AODVで使ってみる
  • IEEE 802.11 DCF MACを使うならば

ここを編集

---

AODVで使ってみる

• aodv.hの修正

以下の変数を追加する．たぶん，class AODVかと．

   NsObject *downtarget1_;
   NsObject *downtarget2_;
   NsObject *downtarget3_;
   NsObject *downtarget4_;
   NsObject *downtarget5_;

• aodv.ccの修正

int AODV::command(int argc, const char*const* argv)に以下の変更

   else if (strcasecmp (argv[1], "down-target-1") == 0) {
   downtarget1_ = (NsObject *) TclObject::lookup(argv[2]);
   return TCL_OK;
   }
  else if (strcasecmp (argv[1], "down-target-2") == 0) {
   downtarget2_ = (NsObject *) TclObject::lookup(argv[2]);
   return TCL_OK;
   }
   else if (strcasecmp (argv[1], "down-target-3") == 0) {
   downtarget3_ = (NsObject *) TclObject::lookup(argv[2]);
   return TCL_OK;
   }
   else if (strcasecmp (argv[1], "down-target-4") == 0) {
   downtarget4_ = (NsObject *) TclObject::lookup(argv[2]);
   return TCL_OK;
   }
   else if (strcasecmp (argv[1], "down-target-5") == 0) {
   downtarget5_ = (NsObject *) TclObject::lookup(argv[2]);
   return TCL_OK;
   }

---

IEEE 802.11 DCF MACを使うならば

エラーを避けるために必要らしい．

• mac/mac-802_11.ccの修正

   #include "arp.h"
   #include "ll.h"
   #include "mac.h"
   #include "mac-timers.h"
   #include "mac-802_11.h"
   #include "cmu-trace.h"
   /*
   multi-interface support
   */
   #define NUM_NICS 5
   ...
   int
   Mac802_11::command(int argc, const char*const* argv)
   {
   if (argc == 3) {
   if (strcmp(argv[1], "log-target") == 0) {
   logtarget_ = (NsObject*) TclObject::lookup(argv[2]);
   if(logtarget_ == 0)
   return TCL_ERROR;
   return TCL_OK;
   } else if(strcmp(argv[1], "nodes") == 0) {
   if(cache_) return TCL_ERROR;
   /* multiple interface support
   cache_node_count_ = atoi(argv[2]);
   */
   cache_node_count_ = atoi(argv[2]) * NUM_NICS;
   cache_ = new Host[cache_node_count_ + 1];
   assert(cache_);
   ...
   void
   Mac802_11::recv_timer()
   {
   ...
   /* multiple interface support
   */
   // if(dst != (u_int32_t)index_) {
   if((dst/NUM_NICS) != (u_int32_t)(index_/NUM_NICS)) {
   set_nav(mh->dh_duration);
   }
   ...