1

Two-dimensional packet classification algorithm using a

quad-tree

Authors: Hyesook Lim,Min Young Kang and Changhoo YimPublisher: computer communicationsPresent: Kia-Tso ChangDate: September 27 2007

outline

Area-based quad-tree (AQT) Proposed priority-based quad-tree (PQT) Update procedure Performance evaluation

2

space decomposition

3

he shehis hers

space decomposition

4

R0 (1010* , 01*)

R1 (* , 11*)

1010

0*

100*

1011

11*

00*

01*

10*

11*

Crossing filter (CF)

5

Crossing filter (CF)

R1

R0

Proposed priority-based quad-tree (PQT)

Proposed priority-based quad-tree (PQT)

8

Proposed priority-based quad-tree (PQT)

9

Proposed priority-based quad-tree (PQT)

10

Flow chart for search procedure

update

Delete

Insert• By priority

• By crossing filter

performance

performance