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f
b
a
n
d
w
id
th
an
d
d
ela
y
,
as
lo
n
g
as
th
e
b
r
o
w
s
er
k
ee
p
s
p
o
llin
g
f
o
r
d
ata
r
eg
u
lar
l
y
an
d
th
e
s
er
v
er
co
n
tin
u
e
s
r
esp
o
n
d
in
g
ev
en
w
h
e
n
n
o
m
es
s
ag
e
s
ca
n
b
e
s
en
t
o
r
r
ec
eiv
ed
[
9
]
.
XHR
is
ac
tiv
e
w
it
h
co
m
m
u
n
i
ca
tio
n
t
h
at
d
o
es
n
o
t
n
ee
d
to
f
u
ll
d
u
p
lex
ap
p
r
o
ac
h
[
1
0
]
.
I
n
ad
d
itio
n
,
s
ev
er
al
d
ev
elo
p
er
s
u
s
ed
SIP
(
Ses
s
io
n
I
n
i
tiatio
n
P
r
o
to
co
l)
w
it
h
W
eb
R
T
C
to
o
b
tain
v
id
eo
ca
lls
,
n
ev
er
t
h
eles
s
SIP
s
t
ill
n
e
ed
s
s
o
f
t
w
ar
e
s
u
ch
s
er
v
er
s
a
n
d
in
s
tallatio
n
[
1
1
]
.
B
esid
es,
th
e
cu
r
r
en
t
r
ea
l
-
t
i
m
e
co
m
m
u
n
icatio
n
A
P
I
s
i
n
a
n
a
p
p
licatio
n
is
m
o
r
e
co
s
t
e
f
f
ici
en
t
a
n
d
f
aster
th
a
n
d
e
v
elo
p
in
g
a
SIP
clien
t
[
1
2
]
.
Fu
r
t
h
er
m
o
r
e,
SIP
h
as
a
h
ig
h
b
an
d
w
id
t
h
co
n
s
u
m
p
t
io
n
a
n
d
d
elay
s
a
s
co
m
p
ar
ed
w
it
h
o
t
h
e
r
p
r
o
to
co
ls
s
u
c
h
a
s
I
n
ter
-
Ast
er
is
k
eXc
h
a
n
g
e2
(
I
AX2
)
[
1
3
]
.
I
n
th
i
s
p
ap
er
,
W
eb
NSM
w
as
cr
ea
ted
f
o
r
v
id
eo
co
n
f
er
en
ci
n
g
b
ased
o
n
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
(
A
P
I
)
u
s
in
g
s
o
ck
et.
io
m
ec
h
a
n
i
s
m
to
co
n
n
ec
t
b
et
w
ee
n
ea
ch
o
f
th
e
b
r
o
w
s
er
s
.
So
c
k
et.
io
(
A
P
I
)
o
f
f
er
e
s
r
ea
l
-
ti
m
e
b
i
-
d
ir
e
ctio
n
al
co
m
m
u
n
icatio
n
b
et
w
e
en
a
cli
e
n
t a
n
d
a
s
er
v
er
[
1
4
]
.
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
(
A
P
I
)
is
an
ar
r
ay
o
f
UR
L
o
b
jects
th
at
s
e
n
d
an
y
I
C
E
(
I
n
ter
ac
tiv
e
C
o
n
n
ec
t
iv
i
t
y
E
s
tab
li
s
h
m
en
t)
ca
n
d
id
ates
to
th
e
o
t
h
er
p
ee
r
,
h
a
n
d
les
th
e
v
id
eo
s
tr
ea
m
,
an
d
s
tar
ts
o
f
f
er
/an
s
w
er
n
e
g
o
tiatio
n
p
r
o
ce
s
s
,
etc
[
1
5
]
.
W
eb
NSM
ca
n
p
r
o
v
id
e
h
y
b
r
id
ch
ar
ac
ter
is
tics
as
f
o
llo
w
s
:
(
a)
o
n
e
-
to
-
o
n
e
(
s
a
m
p
le)
b
i
-
d
ir
ec
tio
n
a
l
v
id
eo
co
n
f
er
en
ci
n
g
,
(
b
)
o
n
e
-
to
-
o
n
e
(
s
a
m
p
le)
u
n
id
ir
ec
tio
n
al
v
id
eo
co
n
f
er
en
c
in
g
,
(
c)
o
n
e
-
to
-
m
a
n
y
(
s
tar
)
i
n
id
ir
ec
tio
n
a
l
v
i
d
eo
co
n
f
er
en
ci
n
g
,
(
d
)
m
a
n
y
-
to
-
m
a
n
y
(
m
e
s
h
)
b
i
-
d
ir
ec
tio
n
al
v
id
eo
co
n
f
er
e
n
ci
n
g
,
(
e)
p
r
o
v
id
es
t
w
o
k
i
n
d
s
o
f
co
m
m
u
n
icatio
n
s
,
s
o
ea
ch
p
ee
r
is
f
r
ee
to
b
e
a
s
a
b
r
o
ad
ca
s
ter
o
r
v
ie
w
er
,
(
f
)
d
eter
m
i
n
e
r
o
o
m
in
i
tiato
r
,
(
g
)
k
ee
p
a
s
es
s
io
n
p
r
o
d
u
ctiv
e
ev
en
an
o
t
h
er
p
ar
ticip
an
t
lea
v
e
s
,
(
h
)
p
ar
ticip
an
ts
ar
e
ab
le
to
s
h
ar
e
w
i
th
all
u
s
er
s
,
(
i)
j
o
in
e
x
is
t
in
g
s
es
s
io
n
,
(
j
)
s
to
p
s
elf
-
s
tr
ea
m
s
a
n
d
(
k
)
s
h
ar
in
g
n
e
w
u
s
er
w
it
h
c
u
r
r
en
t
p
ar
ticip
an
ts
.
Fu
r
t
h
er
m
o
r
e,
W
eb
N
SM
is
u
s
ef
u
l
to
b
e
u
s
ed
f
o
r
v
ar
io
u
s
co
m
m
u
n
icati
o
n
s
.
Fo
r
ex
a
m
p
le,
m
-
Hea
lt
h
(
m
an
y
d
o
cto
r
s
ca
n
co
m
m
u
n
ica
te
m
a
n
y
tec
h
n
icia
n
s
an
d
p
atien
t
s
)
,
e
-
lear
n
i
n
g
(
m
an
y
teac
h
er
s
ca
n
co
m
m
u
n
icate
m
an
y
s
t
u
d
en
t
s
an
d
m
an
y
s
t
u
d
en
ts
ca
n
co
m
m
u
n
icate
o
t
h
er
s
)
,
co
m
m
u
n
icatio
n
ap
p
licatio
n
s
,
etc.
I
n
ad
d
itio
n
,
it
g
i
v
es
a
u
s
er
a
f
u
l
l
f
le
x
ib
ilit
y
to
u
s
e
ap
p
r
o
p
r
iate
to
p
o
lo
g
y
ac
co
r
d
in
g
to
its
r
eso
u
r
ce
s
.
T
h
e
ess
e
n
ti
al
o
b
j
ec
tiv
es
o
f
t
h
is
p
ap
er
ar
e
to
cr
ea
te
a
h
y
b
r
id
s
ig
n
alli
n
g
m
ec
h
a
n
is
m
to
s
e
r
v
e
d
if
f
er
en
t
to
p
o
lo
g
ies
at
th
e
s
a
m
e
ti
m
e.
I
n
ad
d
itio
n
to
d
esig
n
i
n
g
a
n
d
i
m
p
le
m
en
t
in
g
a
W
eb
R
T
C
v
id
eo
co
n
f
er
en
ci
n
g
f
o
r
m
an
y
u
s
er
s
,
in
c
lu
d
i
n
g
a
n
ev
al
u
a
tio
n
o
f
s
i
g
n
alli
n
g
p
er
f
o
r
m
a
n
ce
,
b
an
d
w
id
t
h
co
n
s
u
m
p
tio
n
,
C
P
U
p
er
f
o
r
m
a
n
ce
,
m
e
m
o
r
y
u
s
a
g
e,
Q
u
alit
y
o
f
E
x
p
er
ien
ce
(
Qo
E
)
,
u
s
i
n
g
m
es
h
to
p
o
lo
g
y
(
f
u
ll
d
u
p
lex
)
,
s
tar
to
p
o
lo
g
y
(
s
i
m
p
le
x
/
u
n
id
ir
ec
tio
n
al)
a
n
d
ca
lc
u
lati
n
g
th
e
m
a
x
i
m
u
m
lin
k
s
an
d
R
T
P
(
R
ea
l
T
im
e
P
r
o
to
co
l)
.
T
h
is
p
ap
er
is
o
r
g
an
i
s
ed
an
d
o
u
tli
n
ed
as
f
o
llo
w
s
,
Sectio
n
2
r
ep
o
r
ts
o
n
s
u
r
v
e
y
W
eb
R
T
C
r
elate
d
w
o
r
k
.
I
n
s
ec
tio
n
3
,
th
e
m
et
h
o
d
o
lo
g
y
o
f
th
e
p
ap
er
is
ex
p
lain
ed
al
o
n
g
w
it
h
i
m
p
le
m
e
n
tatio
n
an
d
an
al
y
s
is
.
Sectio
n
4
d
is
cu
s
s
es t
h
e
e
v
al
u
atio
n
.
Fi
n
al
l
y
,
Sectio
n
5
h
a
s
t
h
e
co
n
cl
u
s
io
n
an
d
f
u
t
u
r
e
w
o
r
k
.
2.
RE
L
AT
E
D
WO
RK
Dif
f
er
en
t
d
e
v
elo
p
er
s
atte
m
p
t
ed
to
cr
ea
te
o
r
d
ev
elo
p
a
s
ig
n
al
lin
g
m
ec
h
a
n
i
s
m
o
r
a
p
r
o
to
co
l
f
o
r
W
eb
R
T
C
.
Ho
w
e
v
er
,
m
o
s
t
o
f
th
e
m
f
ac
ed
s
o
m
e
r
ea
s
o
n
s
.
T
h
e
f
o
llo
w
i
n
g
elab
o
r
atio
n
s
w
il
l
d
escr
ib
e
s
o
m
e
o
f
th
ese
i
s
s
u
es:
As
m
en
t
io
n
ed
in
[
1
6
]
,
s
ig
n
al
li
n
g
m
a
n
a
g
e
m
e
n
t
h
as
n
o
t
y
et
b
ee
n
s
p
ec
i
f
ied
b
y
W
eb
R
T
C
to
allo
w
t
h
e
d
ev
elo
p
er
to
m
o
d
if
y
,
r
eu
s
e
ex
is
t
in
g
p
r
o
to
co
ls
an
d
p
er
m
its
th
e
m
f
r
ee
d
o
m
to
d
esig
n
t
h
eir
s
ig
n
alli
n
g
to
av
o
id
r
ed
u
n
d
an
c
y
a
n
d
to
in
cr
ea
s
e
co
m
p
atib
il
it
y
w
i
th
estab
li
s
h
ed
tech
n
o
lo
g
ie
s
[
1
1
]
.
Mo
r
eo
v
er
,
an
o
v
er
v
ie
w
o
f
W
eb
R
T
C
v
id
eo
co
n
f
er
en
ci
n
g
ar
ch
itect
u
r
e
u
s
in
g
M
C
U
(
M
u
ltip
o
in
t
C
o
n
f
er
e
n
cin
g
U
n
it)
w
a
s
s
h
o
w
n
in
[
1
7
]
,
in
cl
u
d
in
g
a
d
e
m
o
n
s
tr
atio
n
o
f
s
o
m
e
ch
alle
n
g
es.
Ho
w
ev
er
,
th
is
s
ce
n
ar
io
d
o
es
n
o
t
d
is
cu
s
s
an
y
s
i
g
n
all
in
g
m
ec
h
a
n
i
s
m
o
r
p
r
o
to
co
l
w
h
ile
th
e
p
r
o
p
o
s
ed
test
w
a
s
r
el
y
i
n
g
o
n
u
s
i
n
g
MCU
t
h
at
ca
n
b
e
ap
p
lied
u
s
in
g
a
s
i
n
g
le
co
n
n
ec
tio
n
.
A
ls
o
,
[
1
7
]
r
an
an
ap
p
licatio
n
o
f
W
eb
R
T
C
v
id
eo
co
n
f
er
en
c
in
g
u
s
i
n
g
t
h
e
L
ico
d
e
-
E
r
izo
(
MCU)
an
d
Sa
m
s
u
n
g
Gala
x
y
f
o
r
ea
ch
p
a
r
ticip
an
t.
L
ico
d
e
o
f
f
er
s
a
clien
t
A
P
I
w
it
h
-
E
r
izo
th
at
h
an
d
le
s
co
n
n
ec
t
io
n
s
f
o
r
v
ir
tu
a
l r
o
o
m
s
an
d
a
s
er
v
er
A
P
I
f
o
r
co
m
m
u
n
ica
tio
n
.
Ne
v
er
th
eless
,
w
it
h
o
u
t
u
s
in
g
t
h
e
th
ir
d
p
ar
t
y
(
L
ico
d
e
-
E
r
izo
)
it
ca
n
n
o
t
r
u
n
t
h
is
ap
p
licatio
n
.
T
h
e
test
w
as
ac
h
ie
v
ed
a
m
o
n
g
t
h
r
ee
r
o
o
m
s
ea
c
h
r
o
o
m
co
n
s
is
t
s
o
f
m
a
x
i
m
u
m
th
r
ee
p
ar
ticip
an
ts
,
as
w
ell
as
t
h
e
y
h
av
e
n
o
t
p
r
esen
ted
an
y
th
i
n
g
ab
o
u
t
t
h
e
s
ig
n
all
in
g
m
ec
h
a
n
is
m
.
On
t
h
e
o
th
er
h
an
d
,
a
s
ill
u
s
tr
ated
in
[
1
8
]
,
u
s
in
g
MC
U
is
v
er
y
e
x
p
en
s
iv
e,
a
n
d
[
1
9
]
m
en
tio
n
ed
t
h
at
M
C
U
is
co
s
tl
y
a
n
d
it
ca
n
b
e
r
en
ted
f
r
o
m
s
er
v
ice
p
r
o
v
id
er
s
d
u
r
in
g
a
co
n
f
er
en
ce
,
alt
h
o
u
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h
r
o
u
g
h
W
eb
NSM.
W
h
en
th
e
in
it
iato
r
o
p
en
s
th
e
m
ai
n
r
o
o
m
,
W
eb
NS
M
w
ill
b
e
r
ea
d
y
to
s
u
p
p
o
r
t
an
y
o
f
f
er
er
an
d
d
etec
t
a
r
o
o
m
p
r
esen
ce
.
T
h
u
s
,
s
ev
er
al
f
u
n
ctio
n
s
a
n
d
s
tep
s
h
av
e
b
ee
n
e
m
p
lo
y
ed
to
cr
ea
te
it.
F
i
r
s
t
o
f
all,
it
s
h
o
u
ld
tr
an
s
m
it
t
h
e
d
ata
as
a
S
t
r
in
g
a
n
d
s
et
u
p
a
d
ef
au
lt
ch
an
n
el
p
ass
ed
t
h
r
o
u
g
h
co
n
s
tr
u
cto
r
u
s
i
n
g
"
co
n
n
ec
tio
n
.
ch
a
n
n
e
l
=
c
h
an
n
e
l
|
|
R
MC
Def
a
u
lt
C
h
an
n
el"
.
A
d
d
itio
n
all
y
,
it
co
n
n
ec
t
s
w
it
h
a
s
ig
n
alli
n
g
c
h
an
n
el
w
h
e
n
o
n
l
y
th
e
f
ir
s
t
p
ar
ticip
a
n
t
i
s
f
o
u
n
d
u
s
i
n
g
i
n
v
o
k
e
"
g
et
User
Me
d
ia
"
th
en
in
i
tR
T
C
Mu
lt
iSes
s
io
n
f
u
n
ctio
n
.
W
eb
NSM
w
a
s
b
u
ilt
to
ac
co
m
p
li
s
h
m
an
y
c
h
ar
ac
ter
is
t
i
cs,
s
u
ch
as
d
eter
m
i
n
i
n
g
t
h
e
r
o
o
m
i
n
it
iato
r
"
co
n
n
ec
tio
n
.
in
i
tiato
r
=
tr
u
e"
,
allo
w
i
n
g
a
s
i
n
g
le
u
s
er
to
j
o
in
a
r
o
o
m
"
co
n
n
ec
t
io
n
.
j
o
in
=
j
o
in
S
ess
io
n
"
,
k
ee
p
i
n
g
a
s
ess
io
n
ac
ti
v
e
e
v
e
n
i
f
th
e
in
iti
a
to
r
leav
es
(
clo
n
e
d
ata
f
r
o
m
i
n
itial
m
o
d
er
ato
r
to
t
h
e
s
ec
o
n
d
in
i
tiato
r
an
d
m
a
k
e
s
u
r
e
t
h
at
i
f
s
ec
o
n
d
leav
e
s
.
T
h
e
co
n
tr
o
l
is
s
h
i
f
ted
to
a
th
ir
d
p
er
s
o
n
if
t
h
e
i
n
itiato
r
w
a
n
t
s
to
clo
s
e
an
en
tire
s
ess
io
n
t
h
en
s
h
i
f
ts
th
e
in
i
tiatio
n
co
n
tr
o
l
to
a
n
o
th
er
u
s
er
)
,
h
ea
r
i
n
g
n
e
w
u
s
er
w
it
h
e
x
is
ti
n
g
p
ar
ticip
an
ts
o
n
Ne
w
P
ar
ticip
an
t
(
r
esp
o
n
s
e)
‟
‟
,
p
ar
tic
ip
an
ts
ar
e
s
h
ar
ed
w
it
h
a
s
in
g
le
u
s
er
o
r
w
it
h
all
u
s
er
s
,
if
t
h
e
in
itiato
r
d
is
co
n
n
ec
t
s
s
o
ck
ets,
p
ar
ticip
an
ts
s
h
o
u
ld
also
d
is
co
n
n
ec
t,
clo
s
e
th
e
e
n
tir
e
s
ess
io
n
,
r
ej
ec
t
u
s
er
-
id
,
d
is
c
o
n
n
ec
t
f
o
r
all,
o
p
en
p
r
iv
ate
s
o
ck
e
t t
h
at
i
s
u
s
ed
to
r
ec
eiv
e
o
f
f
er
-
s
d
p
"
n
e
w
P
r
i
v
ateS
o
ck
et
"
an
d
a
s
k
o
th
er
u
s
er
s
to
c
r
ea
te
o
f
f
er
-
s
d
p
a
n
d
f
u
n
ctio
n
P
ee
r
C
o
n
n
ec
t
io
n
.
T
h
e
y
also
u
tili
s
e
R
T
C
(
R
ea
l
T
im
e
C
o
n
n
ec
t
io
n
)
to
s
en
d
d
ata
"
co
n
n
ec
tio
n
.
s
en
d
=
f
u
n
ctio
n
(
d
ata,
_
ch
an
n
e
l)
"
,
i
n
it
ialize
"
R
T
C
Mu
lti
Ses
s
io
n
"
w
h
ich
is
t
h
e
b
ac
k
b
o
n
e
o
b
j
ec
t.
T
h
e
cu
s
to
m
d
ev
ice
s
ar
e
s
elec
ted
an
d
s
cr
ee
n
_
co
n
s
tr
ain
ts
,
s
u
ch
as
s
cr
ee
n
.
w
id
t
h
,
s
c
r
ee
n
.
h
ei
g
h
t.
P
ar
ticip
an
ts
also
ch
ec
k
i
f
t
h
e
s
cr
ee
n
-
ca
p
tu
r
in
g
ex
te
n
s
io
n
is
i
n
s
tal
le
d
.
W
h
en
a
s
tr
ea
m
is
s
to
p
p
ed
,
it
m
u
s
t
b
e
r
e
m
o
v
ed
f
r
o
m
"
attac
h
Stre
a
m
s
"
ar
r
ay
to
allo
w
r
e
-
ca
p
tu
r
i
n
g
o
f
t
h
e
s
cr
e
en
,
if
t
h
e
m
u
ted
s
tr
ea
m
is
n
eg
o
tiated
,
au
d
io
/v
id
eo
ar
e
f
ir
ed
ea
r
lier
th
an
s
cr
ee
n
,
s
to
p
lo
ca
l
s
tr
ea
m
„
‟
i
f
(
r
esp
o
n
s
e.
s
to
p
p
ed
)
‟
‟
,
s
to
p
r
em
o
te
s
tr
ea
m
„
‟
i
f
(
r
esp
o
n
s
e.
p
r
o
m
p
tSt
r
ea
m
Sto
p
‟
‟
,
cr
ea
te
a
n
o
f
f
er
SDP
u
s
i
n
g
"
cr
ea
teOf
f
er
()
"
f
u
n
ctio
n
,
cr
ea
te
an
s
w
er
SDP
u
s
in
g
"
cr
ea
teAn
s
w
er
()
"
f
u
n
ct
io
n
,
cr
ea
teDe
s
cr
ip
tio
n
(
)
f
u
n
ctio
n
,
g
etB
r
o
w
s
er
I
n
f
o
(
)
f
u
n
c
tio
n
,
c
o
n
s
tr
u
ct
a
n
e
w
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
,
tr
i
g
g
e
r
t
h
e
s
tu
n
s
er
v
er
r
eq
u
est,
m
atc
h
j
u
s
t
th
e
I
P
ad
d
r
ess
,
r
e
m
o
v
e
d
u
p
lic
ates,
lis
te
n
f
o
r
ca
n
d
id
ate
ev
e
n
t
s
an
d
etc.
T
o
estab
lis
h
a
p
ee
r
-
to
-
p
ee
r
co
n
n
ec
tio
n
,
b
o
th
clien
ts
n
ee
d
to
cr
ea
te
an
R
T
C
P
ee
r
C
o
n
n
ec
ti
o
n
o
b
j
ec
t.
T
h
en
,
ea
ch
p
ee
r
n
ee
d
s
to
o
b
t
ain
t
h
eir
Ses
s
io
n
Des
cr
ip
tio
n
,
an
o
b
j
ec
t
th
at
in
d
icate
s
w
h
at
k
i
n
d
o
f
d
ata
t
h
e
y
w
a
n
t
to
s
e
n
d
to
th
e
o
th
er
cli
en
t
t
h
r
o
u
g
h
t
h
e
co
n
n
ec
tio
n
a
n
d
w
h
at
t
h
e
y
ca
n
d
o
b
y
b
u
ilt
-
i
n
m
et
h
o
d
s
o
f
t
h
e
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
o
b
j
ec
t.
T
h
u
s
,
th
e
o
f
f
er
er
w
ill
s
e
n
d
th
e
r
eq
u
est
to
th
e
an
s
w
er
er
f
o
r
th
e
av
ai
lab
ilit
y
,
in
cl
u
d
in
g
SDP
o
f
f
er
to
r
ec
eiv
e
au
d
io
an
d
v
id
eo
.
T
h
e
an
s
w
e
r
er
(
in
itiato
r
/b
r
o
ad
ca
s
ter
)
w
ill
r
ec
eiv
e
th
e
r
eq
u
est
an
d
s
e
n
d
s
a
co
n
f
ir
m
atio
n
o
f
th
e
av
ailab
ilit
y
a
s
"
r
o
o
m
i
s
ac
ti
v
e"
w
ith
th
e
SDP
co
n
s
tr
ain
t
s
to
r
ec
eiv
e
a
u
d
io
an
d
v
id
eo
.
T
h
e
o
f
f
er
er
g
ets
t
h
e
r
e
m
o
te
s
tr
ea
m
a
n
d
cr
ea
t
es
an
o
f
f
er
u
s
i
n
g
"
g
etL
o
ca
lDescr
ip
tio
n
"
w
it
h
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
.
A
d
d
iti
o
n
all
y
,
t
h
e
o
f
f
er
er
cr
ea
tes
Data
C
h
an
n
el
m
eth
o
d
w
h
ic
h
is
ad
d
ed
to
th
e
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
to
cr
ea
te
an
"
R
T
C
Data
C
h
an
n
el"
o
b
j
ec
t.
W
h
en
a
n
"
R
T
C
Data
C
h
an
n
e
l"
o
n
th
e
o
f
f
er
er
‟
s
s
id
e
is
g
en
er
ated
,
th
e
o
f
f
er
er
in
v
o
k
es
"
cr
ea
teOf
f
er
"
o
f
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
,
t
h
er
eb
y
en
ab
lin
g
"
cr
ea
teOf
f
er
"
to
r
etu
r
n
a
n
o
f
f
er
er
‟
s
SDP
m
e
s
s
ag
e.
T
h
e
o
f
f
er
er
en
ab
le
s
th
e
S
DP
-
o
f
f
er
m
es
s
a
g
e
b
y
s
et
tin
g
v
ar
io
u
s
in
f
o
r
m
atio
n
an
d
s
en
d
th
e
m
th
r
o
u
g
h
W
eb
NSM.
Fo
r
in
s
ta
n
ce
,
b
an
d
w
id
t
h
in
f
o
r
m
atio
n
,
u
s
i
n
g
th
e
p
er
io
d
au
d
io
an
d
v
id
eo
co
d
ec
s
,
etc.
A
d
d
itio
n
all
y
,
b
o
th
th
e
o
f
f
er
er
an
d
an
s
w
er
er
ch
an
g
e
W
eb
NSM
s
tate
to
"
s
tab
le"
,
to
r
e
alis
e
th
at
th
er
e
i
s
n
o
o
f
f
er
/a
n
s
w
er
e
x
c
h
an
g
e
i
n
p
r
o
g
r
ess
.
O
n
ce
t
h
e
"
S
DP
-
o
f
f
er
"
m
ess
a
g
e
r
ea
c
h
es
t
h
e
an
s
w
er
er
t
h
r
o
u
g
h
W
eb
NSM,
th
e
an
s
w
er
er
also
in
itiate
s
its
R
T
C
P
ee
r
C
o
n
n
ec
ti
o
n
in
s
ta
n
ce
to
ac
ce
p
t
th
e
r
eq
u
est.
T
h
e
an
s
w
er
er
u
s
e
s
th
e
"
SDP
-
o
f
f
er
"
in
to
its
R
T
C
P
ee
r
C
o
n
n
ec
tio
n
to
cr
ea
te
an
"
SDP
-
an
s
w
er
"
an
d
th
en
f
o
r
w
ar
d
it
to
th
e
o
f
f
r
er
.
A
ls
o
,
t
h
e
t
w
o
clie
n
ts
n
e
ed
to
ex
ch
a
n
g
e
i
n
f
o
r
m
atio
n
ab
o
u
t
co
m
m
u
n
icat
io
n
m
et
h
o
d
s
t
h
at
t
h
e
y
ca
n
u
s
e
to
r
ea
ch
ea
ch
o
t
h
er
.
T
h
ese
co
m
m
u
n
icat
io
n
m
et
h
o
d
s
ar
e
k
n
o
w
n
as
I
C
E
C
a
n
d
id
ates
a
n
d
th
e
y
w
ill
b
e
e
x
ch
a
n
g
ed
th
r
o
u
g
h
t
h
e
W
eb
NSM.
No
w
t
h
e
an
s
w
er
er
an
d
o
f
f
er
er
ar
e
ab
le
to
r
esp
o
n
d
an
d
th
e
y
b
o
th
co
n
f
i
g
u
r
e
th
e
R
ea
l
T
im
e
C
o
m
m
u
n
icatio
n
(
R
T
C
)
p
ac
k
ets
tr
an
s
p
o
r
ted
.
A
f
ter
t
w
o
p
ee
r
s
ex
c
h
an
g
e
SDP
-
o
f
f
er
/an
s
w
er
an
d
I
C
E
ca
n
d
id
ates,
th
e
y
ca
n
cr
ea
te
th
eir
s
ess
io
n
.
T
h
e
an
s
w
er
er
an
d
o
f
f
er
er
"
ad
d
SDP"
t
o
ca
n
d
id
a
te
UDP
b
y
t
h
e
h
o
s
t
I
P
f
o
r
b
o
th
o
f
th
e
m
.
T
h
e
o
th
e
r
p
ar
ticip
an
ts
ca
n
j
o
in
th
e
s
es
s
io
n
b
ased
o
n
s
i
m
ilar
s
tep
s
.
A
cc
o
r
d
in
g
to
a
co
m
m
u
n
icatio
n
a
s
v
ie
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er
s
,
w
h
e
n
a
n
in
i
tiato
r
is
ac
ti
v
e
f
o
r
s
tr
ea
m
i
n
g
,
a
p
ee
r
is
ab
le
to
ac
ce
d
e
th
e
r
o
o
m
as
a
v
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er
af
ter
d
etec
tin
g
a
r
o
o
m
p
r
esen
ce
u
s
i
n
g
W
eb
NSM.
W
eb
NSM
s
en
d
s
a
n
o
tif
icatio
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to
th
e
in
itiato
r
th
a
t
"
a
p
ar
ticip
an
t
h
a
s
ask
ed
f
o
r
av
ailab
ilit
y
a
n
d
th
e
tar
g
et
h
as
n
o
s
tr
ea
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"
.
I
n
o
th
er
w
o
r
d
s
,
it
i
s
a
u
n
id
ir
ec
tio
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al
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id
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n
f
er
e
n
cin
g
f
r
o
m
an
in
itiato
r
to
a
v
i
e
w
er
.
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i
n
itia
to
r
r
ec
eiv
es
a
r
eq
u
est
a
n
d
s
e
n
d
s
a
co
n
f
ir
m
atio
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o
f
th
e
av
a
ilab
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y
as
"
r
o
o
m
i
s
ac
ti
v
e"
w
ith
t
h
e
SDP
co
n
s
tr
ai
n
t
s
.
T
h
u
s
,
an
i
n
itiato
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h
as
s
tar
ted
b
r
o
ad
ca
s
tin
g
th
e
au
d
io
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d
v
id
eo
to
th
e
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ie
w
er
.
I
n
co
n
tr
ast,
if
th
er
e
ar
e
o
th
er
b
r
o
ad
ca
s
ter
s
,
a
v
ie
w
er
w
i
ll
co
m
m
u
n
icate
all
o
f
t
h
e
m
,
s
o
t
h
e
v
ie
w
er
ca
n
co
m
m
u
n
icate
al
l
b
r
o
ad
ca
s
ter
s
b
y
r
ec
ei
v
i
n
g
t
h
eir
au
d
io
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d
v
id
eo
at
th
e
s
a
m
e
ti
m
e.
I
n
ad
d
itio
n
,
a
s
e
s
s
io
n
ca
n
b
e
ac
tiv
e
e
v
en
if
an
y
b
r
o
ad
ca
s
ter
leav
e
s
;
also
all
v
ie
w
er
s
co
m
m
u
n
icate
all
b
r
o
ad
ca
s
ter
s
at
t
h
e
s
a
m
e
ti
m
e.
Fi
g
u
r
e
2
,
illu
s
tr
ated
th
e
s
i
g
n
al
lin
g
f
o
llo
w
s
b
et
w
ee
n
br
o
ad
ca
s
ter
s
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
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&
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p
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n
g
,
Vo
l.
8
,
No
.
1
,
Feb
r
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ar
y
201
8
:
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Fig
u
r
e
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ig
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[
3
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.
A
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r
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b
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p
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as f
o
llo
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s
:
3
.
3
.
1
.
WebNSM
(
A
H
y
brid Sig
na
llin
g
M
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ha
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m
)
A
p
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f
o
r
m
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ce
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f
W
eb
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as
b
ee
n
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n
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ed
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d
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id
u
a
ll
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u
s
er
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a
cc
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d
in
g
to
t
w
o
co
n
ce
p
t
s
;
t
h
e
f
ir
s
t
w
a
s
b
a
s
ed
o
n
th
e
d
ela
y
to
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et
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d
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d
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r
eq
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an
d
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e
.
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o
r
e,
W
eb
NSM
o
v
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y
,
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s
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l
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m
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6
(
m
s
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as
a
m
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n
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m
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m
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s
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n
d
1
2
0
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s
m
a
x
i
m
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m
co
n
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m
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eq
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est
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v
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e
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o
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ex
p
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d
ex
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d
s
1
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(
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t
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r
esp
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n
s
e.
B
ased
o
n
th
e
co
n
s
u
m
ed
ti
m
e,
it
h
as
n
o
ti
ce
d
th
at
L
A
N
&
W
A
N
n
et
w
o
r
k
s
ar
e
ex
h
ib
ited
a
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n
t
co
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s
u
m
p
tio
n
.
W
e
b
NSM
h
a
s
a
n
e
f
f
icie
n
t
p
er
f
o
r
m
an
ce
w
h
ile
i
t
lead
s
to
s
et
u
p
,
estab
lis
h
a
n
d
e
n
d
a
s
ess
io
n
.
3
.
3
.
2
.
Q
ua
lity
o
f
Video
Co
nfe
re
ncing
A
ct
u
al
u
s
er
s
h
av
e
p
ar
ticip
ated
in
th
i
s
s
ce
n
ar
io
to
g
i
v
e
th
eir
i
n
d
iv
id
u
al
o
p
i
n
io
n
s
o
n
th
e
p
er
ce
iv
ed
u
s
e
r
ex
p
er
ien
ce
b
y
t
h
e
u
s
e
o
f
q
u
esti
o
n
n
air
es.
T
h
e
q
u
alit
y
o
f
au
d
io
an
d
v
id
eo
h
as
b
ee
n
a
n
al
y
s
ed
b
ased
o
n
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2088
-
8708
Desig
n
a
n
d
I
m
p
leme
n
t a
Hyb
r
id
W
eb
R
T
C
S
ig
n
a
llin
g
Mech
a
n
is
m
fo
r
.
.
.
(
N
a
kta
l E
d
a
n
)
395
th
r
ee
to
p
o
lo
g
ies:
a.
B
id
ir
ec
tio
n
al
(
m
es
h
)
:
t
h
e
q
u
a
lit
y
o
f
a
u
d
io
an
d
v
id
eo
u
p
to
ten
p
ee
r
s
u
s
i
n
g
b
i
-
d
ir
ec
tio
n
a
l
s
y
s
te
m
w
er
e
ex
ce
lle
n
t.
Ho
w
ev
er
,
d
u
e
to
C
P
U
li
m
itatio
n
s
,
t
h
e
i
n
cr
ea
s
i
n
g
o
f
a
n
u
m
b
er
o
f
p
ee
r
s
i
n
f
lu
e
n
ce
d
th
e
q
u
alit
y
o
f
a
u
d
io
an
d
v
id
eo
.
T
h
u
s
,
it
wo
u
ld
n
o
t
r
aise
t
h
e
n
u
m
b
er
o
f
u
s
er
s
,
w
h
ile
C
P
U
ca
p
ab
ilit
y
w
a
s
n
o
t
ab
le
to
co
m
m
u
n
icate
an
y
m
o
r
e
.
b.
Un
id
ir
ec
tio
n
al
(
s
i
m
p
lex
&
s
ta
r
)
:
th
is
s
ce
n
ar
io
w
as
s
p
ec
if
ied
f
o
r
v
ie
w
er
s
.
A
ll
v
ie
w
er
s
w
er
e
co
n
n
ec
ti
n
g
to
all
b
r
o
ad
ca
s
ter
s
f
r
o
m
d
if
f
er
e
n
t
d
ev
ice
s
co
n
c
u
r
r
en
tl
y
,
b
u
t
th
e
y
w
er
e
n
o
t
ab
le
to
co
n
n
ec
t
b
et
w
ee
n
th
e
m
s
el
v
es.
T
h
e
q
u
alit
y
o
f
au
d
io
an
d
v
id
eo
u
p
to
th
ir
t
y
p
ee
r
s
as
o
n
e
b
r
o
ad
ca
s
te
r
a
n
d
2
9
v
ie
w
er
s
u
s
i
n
g
u
n
id
ir
ec
tio
n
al
s
y
s
te
m
w
er
e
e
x
ce
llen
t.
Nev
er
t
h
eles
s
,
it
w
o
u
l
d
n
o
t
i
n
cr
ea
s
e
t
h
e
n
u
m
b
er
o
f
v
ie
w
er
s
,
w
h
i
le
C
P
U
ca
p
ab
ilit
y
w
as
n
o
t a
b
le
to
co
m
m
u
n
icate
a
n
y
m
o
r
e
.
c.
H
y
b
r
id
(
B
i
-
d
ir
ec
tio
n
al
&
Un
i
d
ir
ec
tio
n
al)
s
y
s
te
m
:
t
h
e
q
u
alit
y
o
f
au
d
io
an
d
v
id
e
o
u
s
i
n
g
b
o
th
to
p
o
lo
g
ies
w
er
e
ex
ce
llen
t.
Nev
er
t
h
eles
s
,
d
u
e
to
C
P
U
li
m
ita
tio
n
s
,
t
h
e
n
u
m
b
er
o
f
u
s
er
s
w
a
s
li
m
ited
e
s
p
ec
iall
y
w
h
en
th
e
n
u
m
b
er
o
f
b
r
o
ad
ca
s
ter
s
w
as
r
aised
.
Mo
r
eo
v
er
,
as
m
u
c
h
as
th
e
n
u
m
b
er
o
f
b
r
o
ad
ca
s
ter
s
is
d
ec
r
ea
s
ed
it
w
o
u
ld
b
e
p
o
s
s
ib
le
to
en
h
an
ce
th
e
n
u
m
b
er
o
f
v
ie
w
er
s
,
w
h
il
e
th
e
b
r
o
ad
ca
s
ter
s
ar
e
u
s
in
g
m
es
h
to
p
o
lo
g
y
,
w
h
ic
h
n
ee
d
s
a
h
ig
h
C
P
U
u
s
a
g
e.
3
.
3
.
3
.
M
esh
T
o
po
lo
g
y
I
n
a
m
e
s
h
,
an
y
co
n
f
er
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ce
m
e
m
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n
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n
v
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an
o
th
er
u
s
er
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j
o
in
o
r
leav
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at
an
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m
e
w
it
h
o
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t
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lu
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n
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g
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m
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n
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ar
ti
cip
an
ts
.
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t d
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to
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n
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es
h
r
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ts
a
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g
h
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a
n
d
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i
g
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d
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h
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ee
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d
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d
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eiv
e
s
d
if
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er
en
t
R
T
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s
f
r
o
m
th
e
all
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n
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ted
p
ar
ticip
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at
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h
e
s
a
m
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ti
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e
as
ill
u
s
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ated
:
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o
r
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tg
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e
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o
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r
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co
m
i
n
g
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eo
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o
n
e
R
T
P
p
o
r
t f
o
r
in
co
m
in
g
au
d
io
.
3
.
3
.
4
.
CP
U
P
er
f
o
r
m
a
nce
I
t
p
la
y
s
a
s
i
g
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if
ica
n
t
r
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le
o
n
W
eb
R
T
C
v
id
eo
co
n
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in
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,
esp
ec
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y
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s
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m
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h
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I
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a
Xeo
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ee
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ac
ti
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g
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m
er
a
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g
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ag
e
m
e
n
t
n
ee
d
s
a
n
d
p
r
o
ce
s
s
in
g
[
2
3
]
,
in
clu
d
i
n
g
C
P
U
co
r
e
i5
an
d
i7
w
a
s
u
s
ed
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Me
s
h
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n
d
l
es
a
h
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g
h
lo
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d
u
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to
d
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t
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p
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w
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h
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r
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ts
t
h
e
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al
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f
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d
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d
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eo
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O
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e
o
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an
d
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er
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o
r
m
a
n
ce
i
n
th
e
h
y
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r
id
u
n
id
ir
ec
tio
n
al
s
y
s
te
m
w
a
s
e
x
h
ib
ited
w
it
h
r
ath
er
a
lo
w
u
s
ag
e
t
h
an
b
i
-
d
ir
ec
tio
n
al.
I
n
t
h
e
m
ea
n
ti
m
e,
u
s
i
n
g
u
n
id
ir
ec
tio
n
al
s
y
s
te
m
r
eq
u
ir
es
C
P
U
ab
il
itie
s
less
th
a
n
t
h
e
b
i
-
d
ir
ec
tio
n
al
s
y
s
te
m
.
E
ac
h
v
ie
w
er
r
eq
u
ir
es
a
m
ax
i
m
u
m
o
f
t
w
o
R
T
P
s
(
R
ea
l T
i
m
e
P
r
o
to
co
l)
f
r
o
m
ea
ch
b
r
o
ad
ca
s
te
r
to
r
ec
eiv
e
d
a
ta
as
o
n
e
R
T
P
p
o
r
t
f
o
r
in
co
m
i
n
g
v
id
eo
an
d
o
n
e
R
T
P
p
o
r
t
f
o
r
in
co
m
i
n
g
au
d
io
.
Usi
n
g
s
i
m
p
le
x
w
i
ll
p
r
o
m
o
te
r
eso
u
r
ce
s
w
h
ile
i
t
r
eq
u
ir
es
le
s
s
C
P
U
an
d
b
an
d
w
id
t
h
co
n
s
u
m
p
tio
n
s
th
a
n
m
es
h
to
p
o
lo
g
y
.
F
ig
u
r
e
3
d
is
p
la
y
ed
th
e
C
P
U
p
er
f
o
r
m
a
n
ce
o
n
th
e
b
r
o
ad
ca
s
t
er
s
id
e.
Fig
u
r
e
3
.
De
m
o
n
s
tr
ated
C
P
U
p
er
f
o
r
m
a
n
ce
b
ased
o
n
th
e
i
n
it
i
ato
r
en
d
o
v
er
b
o
th
L
A
N
an
d
W
A
N
n
et
w
o
r
k
s
3
.
3
.
5
.
M
em
o
ry
Usa
g
e
P
r
ac
tically
,
m
e
m
o
r
y
d
id
n
o
t
co
n
s
u
m
e
m
u
c
h
ca
p
ab
ilit
ies
w
h
ile
p
ee
r
s
o
n
l
y
n
ee
d
to
h
o
ld
a
s
m
al
l
a
m
o
u
n
t
o
f
s
es
s
io
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s
tate
d
ata,
s
u
c
h
as
w
h
e
n
p
ee
r
s
ar
e
co
n
n
ec
ted
.
A
ls
o
,
t
h
e
co
n
f
er
en
ci
n
g
w
as
in
r
ea
l
ti
m
e;
th
er
ef
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r
e,
t
h
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n
o
n
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d
to
u
tili
s
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a
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m
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m
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to
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u
p
lo
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ata.
Me
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g
d
if
f
er
en
t
s
y
s
te
m
s
a
llo
w
in
g
all
p
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s
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n
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it
h
ea
c
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t
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d
b
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ter
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itt
ed
d
ata
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r
o
m
d
i
f
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er
e
n
t
d
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ic
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s
i
m
u
lta
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eo
u
s
l
y
.
A
h
y
b
r
id
u
s
es
d
i
f
f
er
e
n
t
to
p
o
lo
g
ies
an
d
g
i
v
es
th
e
u
s
e
r
s
f
le
x
ib
ilit
y
,
r
eliab
ilit
y
a
n
d
m
u
lt
i
-
c
h
o
ice
o
f
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2088
-
8708
Desig
n
a
n
d
I
m
p
leme
n
t a
Hyb
r
id
W
eb
R
T
C
S
ig
n
a
llin
g
Mech
a
n
is
m
fo
r
.
.
.
(
N
a
kta
l E
d
a
n
)
397
co
m
m
u
n
icatio
n
s
s
u
ch
a
s
in
it
iato
r
,
b
r
o
ad
ca
s
ter
o
r
v
ie
w
er
.
Mo
r
eo
v
er
,
it
allo
w
s
s
ev
er
al
r
eso
u
r
ce
s
s
u
c
h
a
s
d
ev
ices,
n
et
w
o
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d
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er
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to
o
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eo
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y
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eg
i
s
tr
atio
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d
o
w
n
lo
ad
in
g
o
r
in
s
ta
llatio
n
a
n
d
ca
n
b
e
u
s
ed
in
d
if
f
er
e
n
t a
p
p
licatio
n
s
.
U
s
in
g
t
h
is
s
ce
n
ar
io
s
h
o
w
s
t
h
at
it b
u
i
lt
a
s
tr
o
n
g
W
eb
R
T
C
ap
p
licatio
n
th
a
t
w
o
r
k
s
ac
r
o
s
s
m
u
ltip
le
b
r
o
w
s
er
s
,
n
et
w
o
r
k
s
a
n
d
to
p
o
lo
g
ies.
F
ig
u
r
e
8
,
i
n
d
icate
s
t
h
e
ar
ch
itect
u
r
e
o
f
th
e
h
y
b
r
id
s
y
s
te
m
.
Fig
u
r
e
8
.
D
e
m
o
n
s
tr
ates t
h
e
ar
ch
itect
u
r
e
o
f
h
y
b
r
id
s
y
s
te
m
s
4.
E
VA
L
UA
T
I
O
N
I
t
is
p
r
o
v
ed
th
at
W
eb
NSM
is
ab
le
to
s
etu
p
,
estab
lis
h
a
n
d
clo
s
e
a
s
ess
io
n
o
v
er
L
A
N
o
r
W
A
N
n
et
w
o
r
k
s
.
W
eb
NSM
is
ab
le
to
o
f
f
er
s
i
m
p
lex
(
u
n
id
ir
ec
tio
n
al)
,
s
tar
(
u
n
id
ir
ec
tio
n
al)
a
n
d
m
e
s
h
to
p
o
lo
g
y
(
b
i
-
d
ir
ec
tio
n
al)
.
O
n
t
h
e
co
n
tr
a
r
y
,
it
is
af
f
ec
ted
b
y
t
h
e
C
P
U,
w
h
ic
h
li
m
i
ts
th
e
n
u
m
b
er
o
f
p
ee
r
s
.
A
p
er
f
o
r
m
an
ce
o
f
C
P
U
an
d
b
an
d
w
id
th
co
n
s
u
m
p
tio
n
h
as
m
aj
o
r
is
s
u
es
i
n
au
d
io
an
d
v
id
eo
co
n
f
er
en
cin
g
,
w
h
ile
v
id
eo
co
n
f
er
en
c
in
g
r
eq
u
es
ts
t
h
e
p
r
o
ce
s
s
o
r
f
o
r
d
ec
o
d
in
g
,
en
co
d
i
n
g
an
d
p
r
o
v
id
in
g
th
e
v
id
eo
an
d
au
d
io
co
n
cu
r
r
en
t
l
y
.
T
h
is
ca
n
b
e
d
ef
i
n
ed
as
C
P
U
s
tr
ess
a
n
d
it
d
ep
en
d
s
o
n
d
if
f
er
e
n
t
ele
m
e
n
ts
e.
g
.
th
e
u
s
ed
co
d
ec
‟
s
an
d
t
h
e
q
u
alit
y
o
f
th
e
a
u
d
io
an
d
v
id
eo
.
I
n
ad
d
itio
n
,
th
e
v
ar
iet
y
o
f
b
a
n
d
w
id
th
s
p
ee
d
s
a
m
o
n
g
th
e
v
ar
io
u
s
u
s
er
s
ca
n
i
m
p
ac
t
t
h
e
q
u
alit
y
o
f
v
id
eo
an
d
a
u
d
io
.
T
h
er
ef
o
r
e,
m
es
h
to
p
o
lo
g
y
r
e
q
u
ests
a
h
i
g
h
C
P
U
a
n
d
h
i
g
h
b
an
d
w
id
th
s
p
ee
d
.
Fo
r
in
s
ta
n
ce
,
w
h
e
n
a
u
s
er
u
s
e
s
C
P
U
co
r
e
i5
,
th
e
y
ca
n
n
o
t
p
er
f
o
r
m
as
an
o
t
h
er
u
s
er
,
w
h
o
u
s
es
C
P
U
Xeo
n
,
etc
.
I
n
o
th
er
w
o
r
d
s
,
a
s
h
ig
h
a
s
t
h
e
C
P
U
co
r
e,
it
w
il
l
lead
to
allo
w
m
o
r
e
p
ee
r
s
to
j
o
in
,
b
etter
c
o
m
m
u
n
icatio
n
an
d
en
co
d
in
g
&
d
ec
o
d
in
g
.
T
h
u
s
,
C
P
U
Xeo
n
,
w
h
ic
h
h
as
v
er
y
h
ig
h
p
er
f
o
r
m
a
n
ce
an
d
b
an
d
w
i
d
th
co
n
n
ec
tiv
it
y
i
n
o
r
d
er
t
o
f
in
d
o
u
t
th
e
d
i
f
f
er
en
c
e
a
m
o
n
g
th
e
e
x
is
t
in
g
C
P
Us,
w
a
s
u
s
ed
.
A
cc
o
r
d
in
g
to
th
e
in
d
icate
d
l
i
m
itatio
n
s
,
it
ca
n
b
e
e
m
p
h
as
is
ed
th
at
C
P
U
p
lay
s
a
s
i
g
n
i
f
ica
n
t
r
o
le
in
c
o
m
m
u
n
icatio
n
a
n
d
th
e
n
u
m
b
e
r
o
f
p
ee
r
s
,
as
lo
n
g
a
b
an
d
w
id
t
h
d
o
es
a
lead
in
g
r
o
l
e
in
th
e
q
u
alit
y
o
f
au
d
io
an
d
v
id
eo
.
T
h
e
av
ailab
le
C
P
Us
at
th
e
u
s
ed
co
m
p
u
ter
s
(
e.
g
.
C
o
r
e
i5
&
C
o
r
e
i7
)
ar
e
n
o
t a
b
le
to
en
co
d
e,
d
ec
o
d
e,
s
en
d
an
d
r
ec
eiv
e
v
id
eo
co
n
f
er
e
n
c
in
g
at
th
e
s
a
m
e
ti
m
e
m
o
r
e
t
h
an
ei
g
h
t
p
ee
r
s
v
ia
m
es
h
to
p
o
lo
g
y
in
r
ea
l
i
m
p
le
m
en
tatio
n
.
T
h
is
is
a
v
er
y
p
r
o
d
u
ctiv
e
s
y
s
te
m
t
h
at
o
f
f
er
s
t
w
o
m
ec
h
a
n
is
m
s
f
o
r
v
id
eo
co
n
f
er
e
n
ci
n
g
.
T
h
e
u
s
er
is
f
r
ee
to
ch
o
o
s
e
th
e
ap
p
r
o
p
r
iate
m
ec
h
an
i
s
m
b
ased
o
n
it
s
av
ailab
le
b
an
d
w
id
t
h
,
an
d
C
P
U
ca
p
ab
ilit
ies,
as
w
ell
a
s
t
h
i
s
s
y
s
te
m
i
s
c
h
an
g
ea
b
le
as
lo
n
g
as
t
h
e
u
s
er
ca
n
ch
an
g
e
its
p
o
s
itio
n
f
r
o
m
b
r
o
ad
ca
s
ter
to
v
ie
w
er
co
n
v
er
s
el
y
.
A
d
d
itio
n
al
l
y
,
th
e
p
ar
ticip
an
t
c
an
s
i
m
p
l
y
j
o
in
t
h
e
s
ess
io
n
as
a
b
r
o
ad
ca
s
ter
(
u
s
in
g
m
es
h
)
o
r
as
a
v
ie
w
er
(
u
s
i
n
g
s
i
m
p
le
x
)
,
s
o
u
s
i
n
g
th
e
h
y
b
r
id
s
y
s
te
m
r
ed
u
ce
s
t
h
e
lo
ad
o
n
th
e
C
P
U
a
n
d
b
an
d
w
id
t
h
co
n
s
u
m
p
tio
n
e
f
f
icie
n
tl
y
a
n
d
w
it
h
o
u
t
i
m
p
ac
ti
n
g
o
th
er
p
ar
ticip
an
ts
.
T
h
e
q
u
alit
y
o
f
e
x
p
er
ien
ce
(
Qo
E
)
v
er
if
ies
t
h
at
t
h
is
te
s
tb
ed
en
v
ir
o
n
m
en
t
w
o
r
k
s
co
r
r
ec
tl
y
a
n
d
th
at
it
ca
n
b
e
u
s
ed
to
co
n
d
u
ct
m
o
r
e
ex
te
n
s
i
v
e
e
x
p
er
i
m
en
ts
o
n
u
s
er
ex
p
er
tis
e
i
n
t
h
e
f
u
t
u
r
e
w
h
ile
h
a
v
in
g
h
ig
h
co
r
e
C
P
Us.
5.
CO
NCLU
SI
O
N
AND
F
U
T
U
RE
WO
RK
I
n
th
i
s
p
ap
er
,
a
h
y
b
r
id
W
eb
R
T
C
s
ig
n
a
lli
n
g
m
ec
h
an
is
m
a
n
d
v
id
eo
co
n
f
er
e
n
ci
n
g
u
s
in
g
u
n
i
-
d
ir
ec
tio
n
al
an
d
b
i
-
d
ir
ec
tio
n
al
s
y
s
te
m
s
wer
e
d
esig
n
ed
a
n
d
tes
ted
i
n
r
ea
l
i
m
p
le
m
e
n
tatio
n
a
m
o
n
g
t
h
ir
t
y
P
C
s
.
B
esid
es,
W
eb
NSM
ca
n
b
e
co
n
s
id
er
ed
as
a
n
o
v
el
s
ig
n
alli
n
g
m
ec
h
an
is
m
w
h
ile
it
p
r
ese
n
ts
a
f
le
x
ib
le
co
m
m
u
n
ica
tio
n
a
m
o
n
g
u
s
er
s
.
Mo
r
eo
v
er
,
th
is
ca
n
b
e
ap
p
lied
in
d
if
f
er
en
t
ap
p
licatio
n
s
,
s
u
ch
a
s
g
et
a
g
r
o
u
p
o
f
p
eo
p
le
t
o
g
eth
er
o
n
o
n
e
ca
ll
at
th
e
s
a
m
e
ti
m
e
,
co
n
f
er
en
ci
n
g
a
m
o
n
g
u
s
er
s
,
en
ter
tai
n
m
e
n
t.
e
-
L
ea
r
n
i
n
g
b
et
w
ee
n
teac
h
er
an
d
s
tu
d
e
n
ts
,
m
-
Hea
lth
a
m
o
n
g
p
atien
ts
a
n
d
d
o
cto
r
o
r
s
p
ec
ialis
t
an
d
tech
n
ician
s
,
etc
.
W
eb
NSM
tak
es
an
a
v
er
ag
e
o
f
8
9
(
m
il
lis
ec
o
n
d
s
)
to
b
e
r
ea
d
y
an
d
1
1
1
(
m
i
llis
ec
o
n
d
s
)
to
s
en
d
a
r
eq
u
est
a
n
d
r
ec
ei
v
e
a
r
esp
o
n
s
e,
e
v
en
w
h
en
th
e
n
et
w
o
r
k
i
s
co
n
g
ested
.
A
d
ee
p
ex
p
lan
atio
n
of
C
P
U
p
er
f
o
r
m
an
ce
,
m
e
m
o
r
y
u
s
a
g
e,
s
i
g
n
a
llin
g
p
er
f
o
r
m
a
n
ce
,
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
1
,
Feb
r
u
ar
y
201
8
:
3
9
0
–
3
9
9
398
R
T
P
s
ca
lcu
latio
n
,
Qo
E
,
m
es
h
to
p
o
lo
g
y
an
d
s
i
m
p
lex
to
p
o
lo
g
y
i
n
a
p
h
y
s
ical
i
m
p
le
m
e
n
tati
o
n
w
a
s
d
o
n
e
.
T
h
is
s
ce
n
ar
io
i
s
e
f
f
ic
ien
t
w
h
ile
it
p
r
o
v
id
es
v
i
s
u
a
ll
y
d
e
m
o
o
v
er
th
e
v
ar
io
u
s
d
ev
ice
s
a
n
d
n
et
w
o
r
k
s
w
it
h
a
u
s
er
t
h
a
t
r
eq
u
ir
es
d
ee
p
ex
p
lan
atio
n
a
n
d
f
ac
e
-
to
-
f
ac
e
co
m
m
u
n
icatio
n
.
A
ls
o
,
it
i
m
p
r
o
v
es
co
m
m
u
n
i
ca
tio
n
&
r
ei
n
f
o
r
ce
s
r
elatio
n
s
h
ip
s
an
d
in
cr
ea
s
e
p
r
o
d
u
ctiv
i
t
y
a
m
o
n
g
u
s
er
s
a
n
d
team
s
.
I
n
th
e
f
u
t
u
r
e,
th
er
e
is
an
i
n
ten
tio
n
to
ex
p
an
d
th
is
w
o
r
k
o
v
er
m
o
r
e
s
ca
lab
le
v
id
eo
co
n
f
er
en
c
in
g
u
s
i
n
g
M
A
T
L
A
B
s
i
m
u
lato
r
to
d
is
co
v
er
th
e
ef
f
ec
ti
v
e
n
ess
o
f
r
eso
u
r
ce
s
in
W
eb
R
T
C
.
ACK
NO
WL
E
D
G
E
M
E
NT
S
T
h
is
r
esear
ch
w
as
f
u
n
d
ed
b
y
t
h
e
Mi
n
is
tr
y
o
f
Hi
g
h
er
E
d
u
ca
ti
o
n
in
t
h
e
R
ep
u
b
lic
o
f
I
r
aq
,
ac
co
r
d
in
g
to
th
e
s
c
h
o
lar
s
h
ip
n
u
m
b
er
(
1
4
6
9
)
in
(
0
3
/0
4
/2
0
1
3
)
t
o
s
p
o
n
s
o
r
th
e
f
ir
s
t a
u
th
o
r
to
p
u
r
s
u
e
h
i
s
P
h
D
r
esear
ch
.
RE
F
E
R
E
NC
E
S
[1
]
J.
Ja
n
g
-
Ja
c
c
a
rd
,
S
.
Ne
p
a
l,
B.
C
e
ll
e
r,
a
n
d
B.
Ya
n
,
“
W
e
b
RT
C
-
b
a
se
d
v
id
e
o
c
o
n
f
e
re
n
c
in
g
se
rv
ic
e
f
o
r
tele
h
e
a
lt
h
,
”
Co
mp
u
t
in
g
,
v
o
l.
9
8
,
n
o
.
1
–
2
,
p
p
.
1
6
9
–
1
9
3
,
2
0
1
6
.
A
v
a
il
a
b
lt
:
h
tt
p
s://
li
n
k
.
sp
r
in
g
e
r.
c
o
m
/article
/1
0
.
1
0
0
7
/s0
0
6
0
7
-
0
1
4
-
0
4
2
9
-
2.
[2
]
M
.
P
h
a
n
k
o
k
k
ru
a
d
a
n
d
P
.
Ja
tu
ra
w
a
t,
“
A
n
Ev
a
lu
a
ti
o
n
o
f
T
e
c
h
n
ica
l
S
tu
d
y
a
n
d
P
e
rf
o
rm
a
n
c
e
f
o
r
Re
a
l
-
T
i
m
e
F
a
c
e
De
tec
ti
o
n
Us
in
g
W
e
b
Re
a
l
-
T
i
m
e
Co
m
m
u
n
ica
ti
o
n
,
”
n
o
.
I4
c
t,
p
p
.
1
6
2
–
1
6
6
,
2
0
1
5
.
A
v
a
il
a
b
le:
h
tt
p
:
//
iee
e
x
p
lo
re
.
iee
e
.
o
rg
/ab
stra
c
t/
d
o
c
u
m
e
n
t/
7
2
1
9
5
5
8
/.
[3
]
L
.
N.
Ei
rik
F
o
ss
e
r,
“
Qu
a
li
ty
o
f
Ex
p
e
rien
c
e
o
f
W
e
b
RT
C
b
a
s
e
d
v
id
e
o
c
o
m
m
u
n
ica
ti
o
n
,
”
No
rw
e
g
ia
n
Un
iv
e
rsity
o
f
S
c
ien
c
e
a
n
d
T
e
c
h
n
o
l
o
g
y
,
2
0
1
6
.
Av
a
il
a
b
le:
h
tt
p
s:/
/b
ra
g
e
.
b
ib
sy
s.n
o
/x
m
lu
i/
b
it
s
trea
m
/h
a
n
d
le/1
1
2
5
0
/
2
4
0
9
9
0
0
/1
5
1
4
7
_
F
UL
LT
EX
T
.
p
d
f
?
se
q
u
e
n
c
e
=
1
.
[4
]
W
.
El
leu
c
h
,
“
M
o
d
e
ls
fo
r
mu
l
t
ime
d
ia
c
o
n
fer
e
n
c
e
b
e
twee
n
b
r
o
wse
rs
b
a
se
d
o
n
W
e
b
RT
C,
”
i
n
In
ter
n
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
W
irele
ss
a
n
d
M
o
b
il
e
Co
m
p
u
ti
n
g
,
Ne
tw
o
rk
in
g
a
n
d
Co
m
m
u
n
ica
ti
o
n
s
,
p
p
.
2
7
9
–
2
8
4
,
2
0
1
3
.
A
v
a
il
a
b
le:
h
tt
p
:
//
iee
e
x
p
lo
re
.
iee
e
.
o
rg
/d
o
c
u
m
e
n
t/
6
6
7
3
3
7
3
/
.
[5
]
D.
T
.
Ng
u
y
e
n
,
K.
K.
Ng
u
y
e
n
,
S
.
Kh
a
z
ri,
a
n
d
M
.
Ch
e
riet,
“
Re
a
l
-
T
i
m
e
Op
ti
m
ize
d
NFV
Arc
h
it
e
c
tu
re
f
o
r
In
tern
e
tw
o
rk
in
g
W
e
b
RT
C
a
n
d
IM
S
,
”
,
p
p
.
8
1
–
8
8
,
2
0
1
6
.
A
v
a
il
a
b
le
:
h
tt
p
:/
/i
e
e
e
x
p
lo
re
.
iee
e
.
o
rg
/d
o
c
u
m
e
n
t/
6
6
7
3
3
7
3
/.
[6
]
C.
Y.
Ch
ian
g
,
Y.
L
.
Ch
e
n
,
P
.
S
.
T
sa
i,
a
n
d
S
.
M
.
Y
u
a
n
,
“
A
v
id
e
o
c
o
n
fer
e
n
c
in
g
sy
ste
m
b
a
se
d
o
n
W
e
b
RT
C
fo
r
se
n
io
rs
,
”
i
n
P
r
o
c
e
e
d
in
g
s
-
1
st
In
t
e
rn
a
ti
o
n
a
l
C
o
n
f
e
re
n
c
e
o
n
T
ru
stw
o
rth
y
S
y
st
e
m
s
a
n
d
T
h
e
ir
A
p
p
li
c
a
ti
o
n
s,
T
S
A
,
p
p
.
51
–
5
6
,
2
0
1
4
.
A
v
a
il
a
b
le:
h
tt
p
:/
/
iee
e
x
p
lo
re
.
iee
e
.
o
rg
/d
o
c
u
m
e
n
t/
6
9
5
6
7
1
1
/.
[7
]
S
.
V
a
sh
ish
t
h
,
Y
.
S
i
n
h
a
,
a
n
d
K.
H.
Ba
b
u
,
“
Ad
d
re
ss
in
g
C
h
a
ll
e
n
g
e
s
i
n
Bro
wse
r
B
a
se
d
P
2
P
C
o
n
ten
t
S
h
a
ri
n
g
Fra
me
wo
rk
Us
in
g
W
e
b
RT
C,
”
in
IEE
E
3
0
th
In
tern
a
ti
o
n
a
l
Co
n
f
e
r
e
n
c
e
o
n
A
d
v
a
n
c
e
d
In
f
o
r
m
a
ti
o
n
Ne
tw
o
rk
in
g
a
n
d
A
p
p
li
c
a
ti
o
n
s (A
IN
A
)
,
p
p
.
8
5
0
–
8
5
7
,
2
0
1
6
.
A
v
a
il
a
b
le:
h
tt
p
:/
/i
e
e
e
x
p
l
o
re
.
iee
e
.
o
rg
/d
o
c
u
m
e
n
t/
7
4
7
4
1
7
8
/.
[8
]
S
c
h
a
h
in
Ra
jab
,
“
Co
m
p
a
rin
g
d
iff
e
re
n
t
n
e
t
w
o
rk
to
p
o
lo
g
ies
f
o
r
W
e
b
R
T
C
c
o
n
f
e
r
e
n
c
in
g
,
”
2
0
1
5
.
A
v
a
il
a
b
le:
h
tt
p
s:/
/www
.
k
th
.
se
/so
c
ial/f
il
e
s/5
6
1
4
3
d
b
5
f
2
7
6
5
4
2
2
a
e
7
9
9
4
2
c
/W
e
b
R
T
C.
p
d
f
.
[9
]
S
.
a
S
.
T
.
M
i
n
e
r,
“
G
e
tt
in
g
S
tarte
d
w
it
h
,
”
,
p
p
.
1
–
4
1
,
2
0
1
3
.
A
v
a
il
a
b
le:
h
tt
p
:
//
ww
w
.
c
a
m
b
rid
g
e
in
tern
a
ti
o
n
a
l.
o
rg
/t
e
a
c
h
in
g
-
a
n
d
-
lea
rn
i
n
g
/g
e
tt
in
g
-
sta
rted
-
w
it
h
/.
[1
0
]
R.
Ra
i,
S
o
c
k
e
t.
IO
Rea
l
-
ti
me
W
e
b
Ap
p
li
c
a
ti
o
n
De
v
e
lo
p
me
n
t
.
BIRM
ING
H
A
M
-
M
UMBA
I:
P
A
CKT
,
2
0
1
3
.
Av
a
il
a
b
le:
h
tt
p
s:/
/w
ww
.
p
a
c
k
tp
u
b
.
c
o
m
/
w
e
b
-
d
e
v
e
lo
p
m
e
n
t/
so
c
k
e
ti
o
-
re
a
l
-
ti
m
e
-
w
e
b
-
a
p
p
li
c
a
ti
o
n
-
d
e
v
e
lo
p
m
e
n
t.
[1
1
]
B.
S
re
d
o
jev
,
D.
S
a
m
a
rd
z
ij
a
,
a
n
d
D.
P
o
sa
ra
c
,
“
W
e
b
RT
C
tec
h
n
o
l
o
g
y
o
v
e
rv
iew
a
n
d
si
g
n
a
li
n
g
s
o
lu
ti
o
n
d
e
sig
n
a
n
d
imp
lem
e
n
ta
ti
o
n
,
”
in
3
8
t
h
In
tern
a
ti
o
n
a
l
Co
n
v
e
n
ti
o
n
o
n
In
f
o
rm
a
ti
o
n
a
n
d
Co
m
m
u
n
ica
ti
o
n
T
e
c
h
n
o
l
o
g
y
,
El
e
c
tro
n
ics
a
n
d
M
icro
e
lec
tro
n
ics
,
M
I
P
RO
-
P
r
o
c
e
e
d
in
g
s
,
n
o
.
M
a
y
,
p
p
.
1
0
0
6
–
1
0
0
9
,
2
0
1
5
.
A
v
a
il
a
b
le:
h
tt
p
:
//
iee
e
x
p
lo
re
.
iee
e
.
o
rg
/ab
stra
c
t/
d
o
c
u
m
e
n
t/
7
1
6
0
4
2
2
/.
[1
2
]
C.
No
ti
c
e
a
n
d
A
.
No
ti
c
e
,
“
W
e
b
RT
C
to
c
o
m
p
le
m
e
n
t
I
P
Co
m
m
u
n
ica
ti
o
n
S
e
rv
ice
s,”
2
0
1
6
.
A
v
a
il
a
b
le:
h
tt
p
s:/
/www
.
g
s
m
a
.
c
o
m
/
f
u
tu
re
n
e
t
w
o
rk
s/
w
p
-
c
o
n
ten
t/
u
p
lo
a
d
s/
2
0
1
6
/
0
2
/W
e
b
RTC_
to
_
c
o
m
p
lem
e
n
t_
I
P
_
C
o
m
m
u
n
ica
ti
o
n
_
S
e
rv
ice
s_
v
1
.
0
.
p
d
f
.
[1
3
]
N.
M
.
Ed
a
n
,
A
.
A
l
-
S
h
e
rb
a
z
,
S
.
T
u
rn
e
r,
a
n
d
S
.
A
ji
t,
“
Per
fo
rm
a
n
c
e
e
v
a
lu
a
ti
o
n
o
f
Qo
S
u
si
n
g
S
IP
&
IAX
2
VV
o
IP
p
ro
to
c
o
ls
wit
h
COD
E
CS
,
”
in
P
r
o
c
e
e
d
in
g
s
o
f
S
A
I
Co
m
p
u
ti
n
g
C
o
n
f
e
re
n
c
e
,
S
A
I
,
p
p
.
6
3
1
–
6
3
6
,
2
0
1
6
.
A
v
a
il
a
b
le:
h
tt
p
:
//
iee
e
x
p
lo
re
.
iee
e
.
o
rg
/d
o
c
u
m
e
n
t/
7
5
5
6
0
4
8
/
.
[1
4
]
M
.
G
rin
b
e
rg
,
“
so
c
k
e
ti
o
Do
c
u
m
e
n
tatio
n
,
”
2
0
1
6
.
A
v
a
il
a
b
le:
h
t
tp
s://
m
e
d
ia.rea
d
th
e
d
o
c
s.o
rg
/p
d
f
/p
y
th
o
n
-
so
c
k
e
ti
o
/l
a
tes
t/
p
y
th
o
n
-
so
c
k
e
t
io
.
p
d
f
.
[1
5
]
D.
C.
B.
A
d
a
m
Be
rg
k
v
ist,
B.
A
.
Cu
ll
e
n
Je
n
n
i
n
g
s,
A
n
a
n
t
Na
ra
y
a
n
a
n
,
a
n
d
B.
a
n
d
T
a
y
lo
r,
“
Re
a
l
-
ti
m
e
Co
m
m
u
n
ica
ti
o
n
Be
twe
e
n
Bro
w
se
rs,
”
W
3
C
,
2
0
1
7
.
[
O
n
li
n
e
]
.
A
v
a
il
a
b
le:
h
tt
p
s://
w
3
c
.
g
it
h
u
b
.
io
/w
e
b
rtc
-
p
c
/.
[
A
c
c
e
ss
e
d
:
3
0
-
A
u
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