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25. Nasif Ekiz, Tara Salih, Sibel Küçüköner and Kermal Fidanboylu (2005), “An Overview of Handoff Techniques In Cellular Networks”, Proceedings of World Academy of Science, Engineering and Technology, volume 6.

26. Gregory P. Pollioni (1996), “Trends in Handover Design”, IEEE Communications Magazine, volume 34, pp. 82-90.

Về một phương pháp mới điều khiển mượn, khóa kênh tần số mạng di động tế bào - 16

27. Nishint D. Tripathi, Jeffrey H Reed and Hugh F. VanLandinoham (1998), “Handoff in Cellular Systems”, IEEE Personal Communications, volume 5, pp. 26-37.

28. Alexe E. Leu and Brian L. Mark (2002), “Modeling and Analysis of Fast Handoff Algorithms for Microcellular Networks”, Proceeding of the 10th IEEE MASCOTS’2002, pp. 321-328.

29. Ozan K. Tonguz, Member, Evsen Yanmaz (2008), “The Mathematical Theory of Dynamic Load Balancing in Cellular Networks”, IEEE Transactions on Mobile Computing, Volume 7(12).

30. Sajal K.Das, Sanjoy K.Sen, Rajeev Jayaram, “A Dynamic Load Balancing Strategy for Channel Assignment Using Selective Borrowing in Cellular Mobile Environment”, Wireless Networks, volume 3, pp. 333-347.

31. Johan Karlsson, Berth Eklundh (1989), “A Cellular Mobile Telephone System with Load Sharing-an enhancement of directory retry”, IEEE Transactions on Communications, volume 37(5), pp. 530-535.

32. Yuhong Zhang, Ezzatollah Salari (2009), “A hybrid channel allocation algorithm with priority to handoff calls in mobile cellular networks”, Computer Communications, pp. 880–887 .


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35. Hua Jiang, Stephen S. Rappaport (1994), “Channel borrowing Without Locking for Sectorized Cellular Communications”, IEEE Transactions on vehicular technology, volume 43(4).

36. L. Ortigoza-Guerrero and D. Lara-Rodriguez (1996), “Dynamic channel assignment strategy for mobile cellular networks based on compact...”, Electronics Letters Online No: 19960938.

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39. Dong-Jun Lee, Dong-Ho Cho (2000), ”Performance Analysis of Channel- Borrowing Handoff Scheme Based on User Mobility in CDMA Cellular Systems”, IEEE Transactions on Vehicular Technology, volume 49(6).

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42. H. Jiang, S.S. Rappaport (1998), “Channel Borrowing Without Locking for Asynchronous Hybrid FDMA/TDMA Cellular Communications”, Wireless Personal Communications, pp. 233–254, Kluwer Academic Publishers.

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Polish Scientific Publishers PWN.


PHỤ LỤC

1. Các modul chương trình bộ điều khiển NFS


function depck = depc3(nuyc,nuysig,ck,sigk) gam1=(nuysig*ck-sigk*nuyc)/(nuysig-sigk); gam2=(nuysig*ck+sigk*nuyc)/(nuysig+sigk); depck1=0;

if nuyc==ck

depck1=0;

end

if nuyc>ck

if nuysig==sigk

depck1=2*sqrt(3.14)*exp(-2*((gam2-ck)/sigk)^2)*sqrt(2)/... (nuysig*(1/2-erf(sqrt(2)*(gam2-nuyc)/nuysig))+... sigk*(1/2+erf(sqrt(2)*(gam2-ck)/sigk)))+...

2*(nuysig*(erf(sqrt(2)*(gam2-nuyc)/nuysig)+1/2)+... sigk*(1/2-erf(sqrt(2)*(gam2-ck)/sigk)))/... (nuysig*(1/2-erf(sqrt(2)*(gam2-nuyc)/nuysig))+...

sigk*(1/2+erf(sqrt(2)*(gam2-ck)/sigk)))^2/sqrt(3.14)*... exp(-2*((gam2-ck)/sigk)^2*sqrt(2));

end;

if nuysig>sigk

depck1=sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/... pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk)/nuysig/(1-... erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+... sigk*(erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*(gam1-ck)/sigk)))-... (nuysig*(erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/... nuysig))+sigk*(1+erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*(gam2-ck)/... sigk)))/nuysig/(1-erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*... (gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*... (gam1-ck)/sigk)))^2*sigk*(-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*...

2^(1/2)/sigk+2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk);



...

end;

if nuysig>sigk

depck1=sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/... pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk)/nuysig/... (erf(2^(1/2)*(gam1-nuyc)/nuysig)-erf(2^(1/2)*(gam2-nuyc)/... nuysig)+sigk*(1-erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*...

(gam2-ck)/sigk)))-(nuysig*(1+erf(2^(1/2)*(gam2-nuyc)/nuysig)-... erf(2^(1/2)*(gam1-nuyc)/nuysig))+sigk*(erf(2^(1/2)*(gam1-ck)/sigk)-


erf(2^(1/2)*(gam2-ck)/sigk)))/nuysig/(erf(2^(1/2)*(gam1-nuyc)/... nuysig)-erf(2^(1/2)*(gam2-nuyc)/nuysig)+sigk*(1-erf(2^(1/2)*... (gam1-ck)/sigk)-erf(2^(1/2)*(gam2-ck)/sigk)))^2*sigk*(2/pi^(1/2)*... exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/pi^(1/2)*exp(-2*...

(gam2-ck)^2/sigk^2)*2^(1/2)/sigk); end;

end;

if nuyc<ck



if nuysig==sigk

depck1=-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/(nuysig*(1/2+... erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1/2-erf(2^(1/2)*(gam2-ck)/... sigk)))-2*(nuysig*(1/2-erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1/2+... erf(2^(1/2)*(gam2-ck)/sigk)))/(nuysig*(1/2+erf(2^(1/2)*(gam2-nuyc)/... nuysig))+sigk*(1/2-erf(2^(1/2)*(gam2-ck)/sigk)))^2/pi^(1/2)*...

exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2); end;

if nuysig>sigk

depck1=(1+erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*(gam1-ck)/sigk)+... sigk*(-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)*(gam2-ck)/... sigk^2+2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)*(gam1-ck)/... sigk^2))/nuysig/(1+erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*... (gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*... (gam2-ck)/sigk)))-(nuysig*(erf(2^(1/2)*(gam1-nuyc)/nuysig)-... erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1+erf(2^(1/2)*(gam2-ck)/sigk)-... erf(2^(1/2)*(gam1-ck)/sigk)))/nuysig/(1+erf(2^(1/2)*(gam2-nuyc)/... nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam1-ck)/... sigk)-erf(2^(1/2)*(gam2-ck)/sigk)))^2*(erf(2^(1/2)*(gam1-ck)/sigk)-... erf(2^(1/2)*(gam2-ck)/sigk)+sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/... sigk^2)*2^(1/2)*(gam1-ck)/sigk^2+2/pi^(1/2)*exp(-2*(gam2-ck)^2/... sigk^2)*2^(1/2)*(gam2-ck)/sigk^2));

end;

if nuysig<sigk

depck1=sigk*(-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk+2/... pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk)/nuysig/(erf(2^(1/2)*... (gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*... (gam2-ck)/sigk)+erf(2^(1/2)*(gam1-ck)/sigk)))-(nuysig*(1+erf(2^(1/2)*... (gam1-nuyc)/nuysig)-erf(2^(1/2)*(gam2-

nuyc)/nuysig))+sigk*(erf(2^(1/2)*...

(gam2-ck)/sigk)-erf(2^(1/2)*(gam1-ck)/sigk)))/nuysig/(erf(2^(1/2)*... (gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*... (gam2-ck)/sigk)+erf(2^(1/2)*(gam1-ck)/sigk)))^2*sigk*(-2/pi^(1/2)*... exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk-2/pi^(1/2)*exp(-2*(gam1-ck)^2/... sigk^2)*2^(1/2)/sigk);

end; end;

depck=depck1;


function depck = depc3(nuyc,nuysig,ck,sigk) if nuyc==ck

depck=0;

end

if nuyc>ck

if nuysig==sigk

depck=2*sqrt(3.14)*exp(-2*((gam2-ck)/sigk)^2)*sqrt(2)/... (nuysig*(1/2-erf(sqrt(2)*(gam2-nuyc)/nuysig))+... sigk*(1/2+erf(sqrt(2)*(gam2-ck)/sigk)))+...

2*(nuysig*(erf(sqrt(2)*(gam2-nuyc)/nuysig)+1/2)+... sigk*(1/2-erf(sqrt(2)*(gam2-ck)/sigk)))/... (nuysig*(1/2-erf(sqrt(2)*(gam2-nuyc)/nuysig))+...

sigk*(1/2+erf(sqrt(2)*(gam2-ck)/sigk)))^2/sqrt(3.14)*... exp(-2*((gam2-ck)/sigk)^2*sqrt(2);



end;

if nuysig>sigk

depck=sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/... pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk)/nuysig/(1-... erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+... sigk*(erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*(gam1-ck)/sigk)))-... (nuysig*(erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*(gam1-nuyc)/... nuysig))+sigk*(1+erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*(gam2-ck)/... sigk)))/nuysig/(1-erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*... (gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*... (gam1-ck)/sigk)))^2*sigk*(-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*...

2^(1/2)/sigk+2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk);



...

end;

if nuysig>sigk

depck=sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/... pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/sigk)/nuysig/... (erf(2^(1/2)*(gam1-nuyc)/nuysig)-erf(2^(1/2)*(gam2-nuyc)/... nuysig)+sigk*(1-erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*...

(gam2-ck)/sigk)))-(nuysig*(1+erf(2^(1/2)*(gam2-nuyc)/nuysig)-... erf(2^(1/2)*(gam1-nuyc)/nuysig))+sigk*(erf(2^(1/2)*(gam1-ck)/sigk)-


erf(2^(1/2)*(gam2-ck)/sigk)))/nuysig/(erf(2^(1/2)*(gam1-nuyc)/... nuysig)-erf(2^(1/2)*(gam2-nuyc)/nuysig)+sigk*(1-erf(2^(1/2)*... (gam1-ck)/sigk)-erf(2^(1/2)*(gam2-ck)/sigk)))^2*sigk*(2/pi^(1/2)*... exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)/sigk+2/pi^(1/2)*exp(-2*...

(gam2-ck)^2/sigk^2)*2^(1/2)/sigk); end;

end;

if nuyc<ck

if nuysig==sigk

depck=-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)/(nuysig*(1/2+... erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1/2-erf(2^(1/2)*(gam2-ck)/... sigk)))-2*(nuysig*(1/2-erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1/2+... erf(2^(1/2)*(gam2-ck)/sigk)))/(nuysig*(1/2+erf(2^(1/2)*(gam2-nuyc)/... nuysig))+sigk*(1/2-erf(2^(1/2)*(gam2-ck)/sigk)))^2/pi^(1/2)*...

exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2); end;

if nuysig>sigk

depck=(1+erf(2^(1/2)*(gam2-ck)/sigk)-erf(2^(1/2)*(gam1-ck)/sigk)+... sigk*(-2/pi^(1/2)*exp(-2*(gam2-ck)^2/sigk^2)*2^(1/2)*(gam2-ck)/... sigk^2+2/pi^(1/2)*exp(-2*(gam1-ck)^2/sigk^2)*2^(1/2)*(gam1-ck)/... sigk^2))/nuysig/(1+erf(2^(1/2)*(gam2-nuyc)/nuysig)-erf(2^(1/2)*... (gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam1-ck)/sigk)-erf(2^(1/2)*... (gam2-ck)/sigk)))-(nuysig*(erf(2^(1/2)*(gam1-nuyc)/nuysig)-... erf(2^(1/2)*(gam2-nuyc)/nuysig))+sigk*(1+erf(2^(1/2)*(gam2-ck)/sigk)-... erf(2^(1/2)*(gam1-ck)/sigk)))/nuysig/(1+erf(2^(1/2)*(gam2-nuyc)/... nuysig)-erf(2^(1/2)*(gam1-nuyc)/nuysig)+sigk*(erf(2^(1/2)*(gam1-ck)/... sigk)-erf(2^(1/2)*(gam2-ck)/sigk)))^2*(erf(2^(1/2)*(gam1-ck)/sigk)-... erf(2^(1/2)*(gam2-ck)/sigk)+sigk*(-2/pi^(1/2)*exp(-2*(gam1-ck)^2/... sigk^2)*2^(1/2)*(gam1-ck)/sigk^2+2/pi^(1/2)*exp(-2*(gam2-ck)^2/... sigk^2)*2^(1/2)*(gam2-ck)/sigk^2));

end;

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