Protokolli hmc mac per high data rate wireless sensor

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How does a HMC MAC WSN build up and what it is used for. Usage and Benefits.

Technology

Protokolli HMC-MAC per High
Data Rate Wireless Sensor
Networks
Punoi: Ethem QATO

Permbajtja
• Prezantimi me Protokollin HMC-MAC
• Funksionimi I HMC-MAC
• Krijimi I rrjetit
• Procesi I zbulimit te nyjeve fqinjeve
• Metoda alokimit ne kanal dhe shkembimi
I te dhenave
• Vleresimi I performances te HMC-MAC
nepermjet NS2
• Perfundime 1

Protokolli HMC-MAC
• Hybrid Multi-Channel MAC protocol
• Multiple channels
• Rritje e throughput
• Shmang interferencat
• Nyjet multi-interface
• Propozimi I segmentimit te rrjetit
• HMC MAC perdor
• TDMA per sekuencimin e aktivitetit te nyjeve
• CSMA/CA dhe FDMA per shkembimin e te dhenave
2

Funksionimi I HMC MAC
• Nyja Kordinuese e Rrjtit (NC) me thellesi 0
• Nyjet qe jane ne afersi do te perzgjidhen dhe futen ne rrjet
nga nyja sinjalizuese
• Ne rast se dy nyje NC krijojne dy rrjeta njekohesisht
atehere NC me ID me te madhe do ti bashkohet rrjetit me
NC me ID me te vogel
• Ne cdo moment rivendoset nje rradhe e caktuar
shperndarjeje.
• TDMA mundeson nje shperndarje multi-hop te sinjalit per
sinkronizim dhe zbulim te nyjeve fqinje
3

Zbulimi I nyjeve fqinje
• Zbulimi I nyjeve tregon se cilat nyje interferojne dhe cilat
jane te autorizuara te transmetojne njekohesisht.
• Per thjeshtesi ne shkembimin e informacioneve mes nyjeve
cdo fqinji I caktohet nje bitmap
• Per te shmangur interferencat perdoret fqinjesia 3-hopeshe
4

Skema e alokimit te kanalit
• NC ka per detyre te ndaje kohen ne intervale dhe te
informoje nyjet per segmentimin e kohes.
• Cdo nyje qe do te komunikoje do te perdore te njejtin kanal
duke perdorur CSMA/CA
• NC qendron ne gjendjen marrese ndersa nyjet e ndodhura
ne thellesine 1 do te alternohen ne gjendjen dergues edhe
marres.
• Per alokimin e kanalit cdo nyje perdor nje bitmap me
fqinjesi 3-hopeshe
• Rrjeti ndahet ne dy grupe ku cdo nyje ka bitmap 16 bit-she
per nyjet e secilit grup
5

Shkembimi I te dhenave
• Gjate fazes se shkembimit te te dhenave koha do te ndahet
ne intervale ku cdo interval ndahet ne dy time slote
• Ne time slot e pare nyjet e Grupit 1 jane dergues kurse ata
te grupit 2 jane marres.
• Ne time slotin e dyte rolet nderrohen dhe marresit behen
dhenes ndersa dhenesit marres.
• Nyjet I marrin te dhenat nga fqinjet ne thellesi te uleta dhe
I transmtojne framat ne fqinjet e thellesise me te larte duke
perdorur CSMA/CA
7

Vleresimi I performances
• Vleresimi I performances behet duke krahasuar HMC
MAC me metodat e tjera dhe si metrika perdoren
• Aggregate throughput
• Packet delivery ratio
• Numri I perseritjeve
• Si simulator perdoret NS-2 dhe si rast eshte mare nje
rrjet me dimension 100x100 m2 me nje rreze prej 20 m
• Ne kete version jane konsideruar 3 nderfaqe per sink
dhe 2 nyje femije per cdo nderfaqe.
8

9
• Throughput
agregat rritet me
rritjen e paketave
te gjeneruara
• Duke krahasuar
rastet per trafikun
periodik dhe ate
burst vihet re se ne
rastin e dyte
protokolli HMC-
MAC performon
akoma me mire

• HMC MAC gjeneron
delivery ratios me te
mira ne nyjen sink ne
te dyja rastet
10

• Kur rritet numri I
paketave rritet edhe
numri I perplasjeve
• Ndryshe nga rastet e
zakonshme HMC MAC
redukton numrin e
ridergimit te framave
• Shmang humbjen e
energjise duke
reduktuar perseritjet
11

Perfundime
• Protokolli HMC-MAC ka nje eficence me te madhe se
protokollet e tjera MAC
• Rezultatet tregojne se HMC MAC redukton ne menyre te
konsiderueshme numrin e perplasjeve dhe ridergimin e
paketave ne dy raste te trafikut
• HMC MAC performon me mire se protokollet e tjera ne
rrjetat e ngarkuara dhe kjo eshte e dukshme gjate trafikut
burst
12

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Protokolli hmc mac per high data rate wireless sensor

1. Protokolli HMC-MAC per High Data Rate Wireless Sensor Networks Punoi: Ethem QATO

2. Permbajtja • Prezantimi me Protokollin HMC-MAC • Funksionimi I HMC-MAC • Krijimi I rrjetit • Procesi I zbulimit te nyjeve fqinjeve • Metoda alokimit ne kanal dhe shkembimi I te dhenave • Vleresimi I performances te HMC-MAC nepermjet NS2 • Perfundime 1

3. Protokolli HMC-MAC • Hybrid Multi-Channel MAC protocol • Multiple channels • Rritje e throughput • Shmang interferencat • Nyjet multi-interface • Propozimi I segmentimit te rrjetit • HMC MAC perdor • TDMA per sekuencimin e aktivitetit te nyjeve • CSMA/CA dhe FDMA per shkembimin e te dhenave 2

4. Funksionimi I HMC MAC • Nyja Kordinuese e Rrjtit (NC) me thellesi 0 • Nyjet qe jane ne afersi do te perzgjidhen dhe futen ne rrjet nga nyja sinjalizuese • Ne rast se dy nyje NC krijojne dy rrjeta njekohesisht atehere NC me ID me te madhe do ti bashkohet rrjetit me NC me ID me te vogel • Ne cdo moment rivendoset nje rradhe e caktuar shperndarjeje. • TDMA mundeson nje shperndarje multi-hop te sinjalit per sinkronizim dhe zbulim te nyjeve fqinje 3

5. Zbulimi I nyjeve fqinje • Zbulimi I nyjeve tregon se cilat nyje interferojne dhe cilat jane te autorizuara te transmetojne njekohesisht. • Per thjeshtesi ne shkembimin e informacioneve mes nyjeve cdo fqinji I caktohet nje bitmap • Per te shmangur interferencat perdoret fqinjesia 3-hopeshe 4

6. Skema e alokimit te kanalit • NC ka per detyre te ndaje kohen ne intervale dhe te informoje nyjet per segmentimin e kohes. • Cdo nyje qe do te komunikoje do te perdore te njejtin kanal duke perdorur CSMA/CA • NC qendron ne gjendjen marrese ndersa nyjet e ndodhura ne thellesine 1 do te alternohen ne gjendjen dergues edhe marres. • Per alokimin e kanalit cdo nyje perdor nje bitmap me fqinjesi 3-hopeshe • Rrjeti ndahet ne dy grupe ku cdo nyje ka bitmap 16 bit-she per nyjet e secilit grup 5

7. Skema e alokimit te kanalit (2) 6

8. Shkembimi I te dhenave • Gjate fazes se shkembimit te te dhenave koha do te ndahet ne intervale ku cdo interval ndahet ne dy time slote • Ne time slot e pare nyjet e Grupit 1 jane dergues kurse ata te grupit 2 jane marres. • Ne time slotin e dyte rolet nderrohen dhe marresit behen dhenes ndersa dhenesit marres. • Nyjet I marrin te dhenat nga fqinjet ne thellesi te uleta dhe I transmtojne framat ne fqinjet e thellesise me te larte duke perdorur CSMA/CA 7

9. Vleresimi I performances • Vleresimi I performances behet duke krahasuar HMC MAC me metodat e tjera dhe si metrika perdoren • Aggregate throughput • Packet delivery ratio • Numri I perseritjeve • Si simulator perdoret NS-2 dhe si rast eshte mare nje rrjet me dimension 100x100 m2 me nje rreze prej 20 m • Ne kete version jane konsideruar 3 nderfaqe per sink dhe 2 nyje femije per cdo nderfaqe. 8

10. 9 • Throughput agregat rritet me rritjen e paketave te gjeneruara • Duke krahasuar rastet per trafikun periodik dhe ate burst vihet re se ne rastin e dyte protokolli HMC- MAC performon akoma me mire

11. • HMC MAC gjeneron delivery ratios me te mira ne nyjen sink ne te dyja rastet 10

12. • Kur rritet numri I paketave rritet edhe numri I perplasjeve • Ndryshe nga rastet e zakonshme HMC MAC redukton numrin e ridergimit te framave • Shmang humbjen e energjise duke reduktuar perseritjet 11

13. Perfundime • Protokolli HMC-MAC ka nje eficence me te madhe se protokollet e tjera MAC • Rezultatet tregojne se HMC MAC redukton ne menyre te konsiderueshme numrin e perplasjeve dhe ridergimin e paketave ne dy raste te trafikut • HMC MAC performon me mire se protokollet e tjera ne rrjetat e ngarkuara dhe kjo eshte e dukshme gjate trafikut burst 12

14. FALEMINDERIT PER VEMENDJEN!

Protokolli hmc mac per high data rate wireless sensor

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Protokolli hmc mac per high data rate wireless sensor