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Loop-Based Source Routing Loop-Based Source Routing Protocol for Mobile Ad-hoc Protocol for Mobile Ad-hoc

NetworksNetworks

Loop-Based Source Routing Loop-Based Source Routing Protocol for Mobile Ad-hoc Protocol for Mobile Ad-hoc

NetworksNetworksYosuke Sagawa, Tomonori Asano Yosuke Sagawa, Tomonori Asano

and Hiroaki Higakiand Hiroaki HigakiAdvanced Information Networking and Advanced Information Networking and

Applications Applications (AINA’03)(AINA’03)

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Outline• Introduction• Related work• LBSR Protocol• Conclusions

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Introduction • A routing protocol which detects a transmission

route from a source host to destination host is critical – Mobility– Limited battery capacity

• A communication link between two mobile computers is not always bi-directional

• This paper proposes – LBSR (Loop-Based Source Routing) Protocol

• Supporting uni-directional links

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Introduction (cont.)

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Related work• Flooding of Rreq in DSR

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Related work (cont.)• Flooding of Rrep in DSR

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LBSR Protocol• In DSR protocol

– RS->D and RD->S are detected independently

• In LBSR protocol– S detects a looped route RS->D + RD->S

containing both S and D

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LBSR Protocol (cont.)

Lreq packet

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LBSR Protocol (cont.)

S A

B

D

Lreq packet

Lconf packet

{S}{S, A}

{S, A}

{S, A}

{S, A, B}

{S, A, B ,D}

{S, A, B, D}{S, A, B, D}

Lstop S

D

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LBSR Protocol (cont.)•

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Conclusion• A novel ad-hoc routing protocol• Reduce control packet overhead