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R
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le
C
C
s
o
f
d
if
f
er
en
t f
r
eq
u
e
n
c
y
b
a
n
d
w
id
th
s
in
a
n
o
n
-
co
n
ti
g
u
o
u
s
m
an
n
er
is
ca
lled
i
n
ter
-
b
a
n
d
n
o
n
-
co
n
ti
g
u
o
u
s
C
A
.
T
h
e
in
ter
-
b
an
d
n
o
n
-
co
n
ti
g
u
o
u
s
C
A
,
w
h
ich
is
t
h
e
f
o
cu
s
o
f
th
e
p
ap
er
,
r
esu
lt
s
w
i
th
ad
d
itio
n
a
l
co
m
p
le
x
it
y
i
n
t
h
e
r
ad
io
f
r
eq
u
e
n
c
y
d
es
ig
n
o
f
L
T
E
-
A
ter
m
in
a
l
s
[
7
]
.
Ho
w
e
v
er
,
g
i
v
e
n
t
h
e
cu
r
r
en
t
s
ce
n
ar
io
w
h
er
e
th
e
s
p
ec
tr
u
m
allo
ca
tio
n
i
s
h
i
g
h
l
y
f
r
ag
m
e
n
ted
w
it
h
lar
g
e
f
r
e
q
u
en
c
y
s
ep
ar
atio
n
,
t
h
e
i
n
ter
-
b
an
d
n
o
n
-
co
n
ti
g
u
o
u
s
C
A
is
li
k
el
y
to
b
e
u
s
ed
b
y
t
h
e
ce
ll
u
lar
o
p
er
ato
r
s
f
o
r
ef
f
icie
n
t
u
tili
za
tio
n
o
f
th
e
cu
r
r
en
t
s
p
ec
tr
u
m
s
allo
ca
tio
n
[
8
]
.
Fig
u
r
e
1
.
T
h
r
ee
ty
p
es o
f
C
A
i
n
L
T
E
-
A
[
9
]
An
o
th
er
i
m
p
o
r
tan
t
r
eq
u
ir
e
m
e
n
t
o
f
t
h
e
L
T
E
-
A
i
s
t
h
at
t
h
e
tec
h
n
o
lo
g
y
s
h
o
u
ld
b
e
b
ac
k
w
ar
d
co
m
p
atib
l
e
w
it
h
t
h
e
le
g
ac
y
L
T
E
.
T
h
is
m
ea
n
s
t
h
at
t
h
e
L
T
E
an
d
L
T
E
-
A
u
s
er
s
s
h
o
u
ld
b
e
ab
le
to
co
-
ex
is
t
in
th
e
L
T
E
-
A
n
et
w
o
r
k
.
I
n
t
h
i
s
R
elea
s
e
1
0
n
et
w
o
r
k
,
t
h
e
L
T
E
-
A
u
s
er
s
w
h
i
c
h
h
a
v
e
h
ig
h
p
er
f
o
r
m
a
n
ce
ter
m
in
als
ar
e
ca
p
ab
le
to
s
u
p
p
o
r
t
p
ac
k
et
(
r
e)
tr
an
s
m
i
s
s
io
n
ac
r
o
s
s
m
u
ltip
le
C
C
s
.
O
n
th
e
o
th
er
h
an
d
,
g
i
v
en
t
h
e
li
m
ited
ca
p
ab
ilit
y
o
f
t
h
eir
ter
m
i
n
als,
t
h
e
L
T
E
u
s
er
s
ca
n
o
n
l
y
s
u
p
p
o
r
t p
ac
k
et
(
r
e)
tr
an
s
m
i
s
s
io
n
o
n
a
s
in
g
le
C
C
[
10
]
.
As
m
o
r
e
t
h
a
n
o
n
e
C
C
s
a
v
aila
b
le
an
d
th
e
L
T
E
u
s
er
s
ca
n
o
n
l
y
s
u
p
p
o
r
t
p
ac
k
ets
(
r
e)
tr
an
s
m
i
s
s
io
n
o
n
a
s
in
g
le
C
C
,
C
C
s
elec
t
io
n
t
h
at
is
r
esp
o
n
s
ib
le
to
ass
i
g
n
a
C
C
to
ea
ch
n
e
w
l
y
-
ar
r
i
v
ed
leg
ac
y
L
T
E
u
s
er
s
i
s
b
ec
o
m
i
n
g
o
f
p
ar
am
o
u
n
t
i
m
p
o
r
tan
ce
in
th
e
L
T
E
-
A
[
11
]
.
Nu
m
er
o
u
s
C
C
s
elec
tio
n
alg
o
r
ith
m
s
o
p
er
atin
g
i
n
b
ac
k
w
ar
d
co
m
p
at
ib
le
m
o
d
e
h
av
e
b
ee
n
d
ev
e
lo
p
ed
in
t
h
e
liter
atu
r
e
(
s
ee
[
12
]
f
o
r
a
d
et
ailed
r
ev
ie
w
o
f
C
C
s
elec
tio
n
al
g
o
r
ith
m
s
)
.
Ho
w
e
v
er
,
g
iv
e
n
th
e
c
u
r
r
en
t
f
r
eq
u
e
n
c
y
allo
ca
tio
n
t
h
at
i
s
h
ig
h
l
y
f
r
ag
m
e
n
ted
an
d
t
h
e
cu
r
r
en
t
tr
e
n
d
h
as
s
h
o
w
n
a
n
e
x
p
lo
s
iv
e
d
e
m
a
n
d
f
o
r
r
ea
l
-
ti
m
e
m
u
lti
m
ed
ia
co
n
ten
ts
,
t
h
e
p
e
r
f
o
r
m
an
ce
o
f
th
e
s
e
alg
o
r
ith
m
s
in
s
u
p
p
o
r
tin
g
t
h
e
r
ea
l
-
ti
m
e
m
u
lti
m
ed
ia
co
n
te
n
ts
in
i
n
ter
-
b
an
d
n
o
n
-
co
n
ti
g
u
o
u
s
d
o
w
n
lin
k
L
T
E
-
A
r
eq
u
ir
e
f
u
r
t
h
er
s
t
u
d
y
.
No
te
t
h
at
t
h
is
p
ap
er
f
o
cu
s
es
i
n
th
e
d
o
w
n
li
n
k
s
i
n
ce
s
i
g
n
i
f
ican
tl
y
h
ig
h
er
v
o
l
u
m
e
o
f
m
u
lti
m
ed
ia
tr
af
f
ic
ar
e
to
w
ar
d
s
th
e
d
o
w
n
li
n
k
as
co
m
p
ar
ed
to
th
e
u
p
lin
k
.
T
h
e
m
i
n
i
m
u
m
t
r
an
s
m
is
s
io
n
u
n
it
i
n
ea
ch
C
C
i
n
t
h
e
d
o
w
n
li
n
k
L
T
E
-
A
i
s
ca
lled
a
R
e
s
o
u
r
ce
B
lo
ck
w
h
ic
h
is
m
ad
e
u
p
o
f
1
8
0
k
H
z
b
an
d
w
id
t
h
i
n
t
h
e
f
r
eq
u
en
c
y
d
o
m
ai
n
a
n
d
ex
te
n
d
to
1
m
s
d
u
r
atio
n
i
n
ti
m
e
d
o
m
ai
n
.
A
s
s
u
ch
,
t
h
is
p
ap
er
in
v
e
s
ti
g
ates
t
h
e
p
er
f
o
r
m
a
n
ce
o
f
a
n
u
m
b
er
o
f
C
C
s
e
lectio
n
al
g
o
r
ith
m
s
f
o
r
m
ax
i
m
izin
g
t
h
e
s
y
s
te
m
ca
p
ac
it
y
i
n
th
e
i
n
ter
-
b
a
n
d
d
o
w
n
l
in
k
L
T
E
-
A
.
T
h
is
p
ap
er
co
n
tr
ib
u
tes
to
th
e
id
e
n
ti
f
icatio
n
o
f
a
s
u
itab
le
C
C
s
elec
t
io
n
a
lg
o
r
ith
m
f
o
r
u
s
e
in
th
e
i
n
ter
-
b
an
d
n
o
n
-
co
n
t
ig
u
o
u
s
d
o
w
n
li
n
k
L
T
E
-
A
w
h
ich
is
e
f
f
icien
t
in
m
ax
i
m
iz
in
g
t
h
e
s
y
s
te
m
ca
p
ac
it
y
w
i
th
o
u
t
co
m
p
r
o
m
is
i
n
g
t
h
e
r
eq
u
ir
ed
Q
u
alit
y
o
f
Ser
v
ice
(
Qo
S
)
[
13
]
,
[
14
]
o
f
th
e
r
ea
l
-
ti
m
e
m
u
lti
m
ed
i
a
u
s
er
s
.
T
h
e
r
em
ai
n
d
er
o
f
t
h
is
p
ap
er
is
s
tr
u
ctu
r
ed
as
f
o
llo
w
s
.
Sect
io
n
2
p
r
o
v
id
es
d
etailed
r
ev
ie
w
o
f
C
C
s
elec
tio
n
al
g
o
r
ith
m
s
f
o
r
u
s
e
w
h
en
t
h
e
L
T
E
-
A
n
et
w
o
r
k
s
ar
e
o
p
er
atin
g
in
b
ac
k
w
ar
d
co
m
p
atib
le
m
o
d
e
f
o
llo
w
ed
b
y
Sectio
n
3
th
at
d
is
cu
s
s
ed
m
et
h
o
d
o
f
t
h
is
r
esear
c
h
w
h
er
e
d
etailed
ex
p
lan
at
io
n
s
o
f
s
i
m
u
latio
n
e
n
v
ir
o
n
m
en
t
ar
e
p
r
o
v
id
ed
.
Sectio
n
4
d
is
cu
s
s
ed
r
esu
lts
o
f
th
e
e
v
al
u
ated
C
C
s
elec
tio
n
alg
o
r
it
h
m
s
w
h
er
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s
Sectio
n
5
r
e
m
ar
k
s
th
e
co
n
cl
u
s
io
n
o
f
t
h
e
p
ap
er
.
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2.
C
C
S
E
L
E
CT
I
O
N
A
L
G
O
RI
T
H
M
S
O
P
E
RATI
N
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I
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B
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CK
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C
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I
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L
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As
p
r
ev
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ta
ted
in
Sectio
n
I
,
C
C
s
elec
tio
n
is
r
esp
o
n
s
ib
le
to
a
s
s
ig
n
a
C
C
to
ea
ch
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e
wl
y
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ar
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iv
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L
T
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s
er
s
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h
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g
h
t
h
e
m
aj
o
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it
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R
ad
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R
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r
ce
Ma
n
a
g
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m
e
n
t
(
R
R
M)
s
t
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d
ies
f
o
c
u
s
ed
o
n
eit
h
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p
ac
k
et
s
ch
ed
u
lin
g
an
d
p
r
i
m
ar
y
an
d
s
ec
o
n
d
ar
y
C
C
s
elec
tio
n
s
,
t
h
is
p
ap
er
in
v
esti
g
ate
s
t
h
e
e
x
is
ti
n
g
C
C
s
elec
tio
n
alg
o
r
ith
m
s
g
i
v
en
t
h
at
at
th
e
ea
r
l
y
s
tag
e
o
f
m
i
g
r
atio
n
,
th
e
L
T
E
-
A
n
et
w
o
r
k
s
m
a
y
co
n
tai
n
a
m
i
x
tu
r
e
o
f
L
T
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an
d
L
T
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-
A
u
s
er
s
.
T
h
e
alg
o
r
ith
m
s
co
n
s
id
er
ed
in
t
h
is
s
tu
d
y
i
n
clu
d
e
R
an
d
o
m
[
15
]
,
L
ea
s
t
-
L
o
ad
[
16
]
,
Qu
eu
e
-
L
e
n
g
t
h
[
6
]
,
Ma
x
i
m
u
m
C
h
a
n
n
e
l
Qu
al
it
y
I
n
f
o
r
m
atio
n
(
Ma
x
-
C
QI
)
[
17
]
an
d
C
h
a
n
n
el
-
T
h
r
o
u
g
h
p
u
t
A
w
ar
e
(
C
T
A
)
[
18
]
C
C
s
e
lectio
n
.
T
h
e
R
a
n
d
o
m
,
L
ea
s
t
-
L
o
ad
an
d
Qu
e
u
e
-
L
en
g
t
h
alg
o
r
it
h
m
s
ar
e
lo
ad
-
b
al
an
ce
C
C
s
elec
t
io
n
alg
o
r
ith
m
s
w
h
er
ea
s
t
h
e
Ma
x
-
C
QI
an
d
C
T
A
ar
e
ch
a
n
n
e
l
-
a
w
ar
e
C
C
s
elec
tio
n
al
g
o
r
ith
m
s
[
1
9
]
.
Deta
iled
d
escr
i
p
tio
n
s
o
f
ea
ch
al
g
o
r
it
h
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ar
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h
e
R
an
d
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s
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to
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h
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alan
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d
f
r
o
m
th
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ter
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p
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o
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ith
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ig
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w
ith
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alan
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it
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t
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L
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ad
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ter
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ize)
to
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ch
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w
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ed
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h
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alan
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d
C
C
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elec
ti
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alg
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r
ith
m
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m
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t
b
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th
r
o
u
g
h
p
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t
ef
f
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ien
t
f
o
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n
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t
tak
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g
c
h
an
n
el
q
u
alitie
s
o
f
ea
ch
C
C
i
n
to
co
n
s
id
er
atio
n
.
Giv
e
n
th
e
li
m
i
tatio
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s
o
f
th
e
s
e
lo
ad
-
b
alan
ce
d
C
C
s
elec
tio
n
alg
o
r
it
h
m
s
,
th
e
Ma
x
-
C
QI
alg
o
r
it
h
m
t
h
at
a
s
s
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g
n
s
a
C
C
w
i
th
t
h
e
b
est
ch
a
n
n
el
q
u
alit
y
to
ea
ch
L
T
E
u
s
er
w
as
p
r
o
p
o
s
ed
(
s
ee
E
q
u
atio
n
1
)
.
T
h
is
al
g
o
r
ith
m
h
as
s
h
o
w
n
g
o
o
d
th
r
o
u
g
h
p
u
t
p
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f
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m
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ce
f
o
r
a
li
m
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ted
n
u
m
b
er
o
f
u
s
er
s
w
i
th
i
n
in
tr
a
-
b
a
n
d
co
n
tig
u
o
u
s
/
n
o
n
-
co
n
ti
g
u
o
u
s
C
C
s
w
h
er
e
th
e
r
ad
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p
r
o
p
ag
atio
n
en
v
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o
n
m
e
n
t
in
ea
ch
C
C
is
al
m
o
s
t
s
i
m
ilar
.
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er
t
h
eles
s
,
it
w
ill
l
ea
d
to
in
ef
f
icien
t
u
s
e
o
f
r
eso
u
r
ce
s
i
n
th
e
C
C
s
o
f
h
ig
h
er
f
r
eq
u
en
c
y
s
p
ec
tr
u
m
s
(
i.e
.
C
C
s
at
a
h
ig
h
er
f
r
eq
u
en
c
y
h
a
v
e
p
o
o
r
er
ch
an
n
el
q
u
ali
t
y
)
if
it
is
b
ein
g
i
m
p
le
m
e
n
ted
in
in
ter
-
b
a
n
d
n
o
n
-
co
n
tig
u
o
u
s
C
A
a
s
m
o
s
t o
f
th
e
u
s
er
s
ar
e
as
s
ig
n
ed
to
a
C
C
at
a
lo
w
er
f
r
eq
u
e
n
c
y
.
k
i
k
i
CC
u
s
e
r
a
v
g
r
,
,
_
_
_
(
1
)
m
a
x
1
,
,
m
a
x
,
1
_
_
_
RB
j
j
k
j
i
k
i
r
RB
CC
u
s
e
r
avg
r
(
2
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w
h
er
e
μ
i,
k
is
th
e
p
r
io
r
it
y
o
f
u
s
e
r
i
o
n
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C
k,
r
_
a
vg
_
u
s
er_
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C
i,
k
is
th
e
a
v
er
ag
e
c
h
a
n
n
e
l
q
u
alit
y
o
n
all
R
B
s
o
f
u
s
er
i
o
n
C
C
k
,
r
i,
j,
k
is
t
h
e
c
h
a
n
n
el
q
u
alit
y
o
f
u
s
er
i
o
n
R
B
j
o
n
CC
k
a
n
d
RB
max
i
s
t
h
e
m
a
x
i
m
u
m
a
v
ailab
le
n
u
m
b
er
o
f
R
B
s
.
T
h
e
C
T
A
alg
o
r
it
h
m
w
as
d
e
v
elo
p
ed
to
ad
d
r
ess
th
e
li
m
it
atio
n
s
o
f
th
e
Ma
x
-
C
QI
.
T
h
is
alg
o
r
ith
m
ass
i
g
n
s
a
C
C
to
ea
c
h
n
e
w
l
y
-
ar
r
iv
ed
L
T
E
u
s
er
ac
co
r
d
in
g
to
E
q
u
atio
n
3
.
T
h
e
C
T
A
av
o
id
s
o
v
er
ass
ig
n
m
e
n
t
o
f
a
s
in
g
le
C
C
(
C
C
at
a
lo
w
er
f
r
eq
u
en
c
y
s
p
ec
tr
u
m
)
to
a
m
aj
o
r
ity
o
f
u
s
er
s
b
y
ta
k
i
n
g
th
e
a
v
er
a
g
e
ch
a
n
n
el
q
u
alit
y
o
f
all
L
T
E
u
s
er
s
in
to
ac
co
u
n
t
wh
en
m
ak
in
g
d
ec
is
io
n
.
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h
is
all
o
w
s
t
h
e
alg
o
r
it
h
m
to
ef
f
icie
n
t
l
y
u
ti
lize
r
eso
u
r
ce
s
o
n
all
C
C
s
(
C
C
at
a
lo
w
er
f
r
eq
u
en
c
y
as
w
el
l a
s
C
C
s
at
h
i
g
h
er
f
r
eq
u
en
cie
s
.
N
m
m
m
k
m
i
k
i
k
i
R
CC
u
s
e
r
a
v
g
r
R
CC
u
s
e
r
a
v
g
r
1
,
,
,
_
_
_
_
_
_
(
3
)
w
h
er
e
μ
i,
k
is
th
e
p
r
io
r
it
y
o
f
u
s
e
r
i
o
n
CC
k,
r
_
a
vg
_
u
s
er_
C
C
i,
k
is
th
e
a
v
er
ag
e
c
h
a
n
n
e
l
q
u
alit
y
o
n
all
R
B
s
o
f
u
s
er
i
o
n
C
C
k
(
as
d
ef
in
ed
i
n
E
q
u
atio
n
3
)
,
R
i
is
th
e
av
er
a
g
e
th
r
o
u
g
h
p
u
t
o
f
CC
i,
N
is
t
h
e
m
a
x
i
m
u
m
n
u
m
b
er
o
f
u
s
er
s
.
3.
RE
S
E
ARCH
M
E
T
H
O
D
Si
m
u
latio
n
m
et
h
o
d
is
u
s
ed
i
n
th
is
p
ap
er
to
ev
a
lu
ate
t
h
e
p
er
f
o
r
m
a
n
ce
o
f
t
h
e
C
C
s
elec
tio
n
alg
o
r
ith
m
s
s
tated
i
n
Sect
io
n
2
.
T
h
is
m
eth
o
d
is
c
h
o
s
e
n
a
s
it
is
les
s
co
m
p
le
x
a
n
d
les
s
e
x
p
en
s
i
v
e
as
co
m
p
ar
ed
to
m
at
h
e
m
a
tical
m
o
d
elli
n
g
an
d
r
ea
l
-
ti
m
e
m
ea
s
u
r
e
m
e
n
t
m
et
h
o
d
s
.
T
h
e
s
i
m
u
latio
n
m
o
d
els
t
h
e
d
o
w
n
l
in
k
L
T
E
-
A
t
o
co
n
s
is
t
o
f
a
s
in
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le
p
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ll
o
f
4
0
0
m
r
ad
iu
s
w
it
h
a
b
ase
s
tat
io
n
lo
ca
ted
at
th
e
ce
n
ter
o
f
th
e
ce
ll.
I
t
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as
s
u
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at
a
ll
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m
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3
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k
m
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ta
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tio
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.
U
s
er
s
ar
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u
n
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f
o
r
m
l
y
d
i
s
tr
ib
u
ted
w
it
h
i
n
th
e
ce
ll.
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u
g
h
p
u
t a
n
d
P
ac
k
et
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o
s
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R
atio
(
P
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)
.
T
h
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m
e
tr
ics ar
e
m
at
h
e
m
a
ticall
y
ex
p
r
ess
ed
as
f
o
llo
w
s
:
(
4
)
(
5
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w
h
er
e
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r
x
i
(
t)
i
s
th
e
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tal
s
ize
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f
co
r
r
ec
tly
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ei
v
ed
p
ac
k
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(
in
b
its
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o
f
u
s
er
i
at
ti
m
e
t,
p
d
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ca
r
d
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(
t
)
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t
h
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tal
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ize
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f
d
is
ca
r
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ed
p
ac
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n
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o
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at
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t
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p
s
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(
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)
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tal
s
ize
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f
all
p
ac
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et
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in
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its
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ar
r
iv
e
i
n
to
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eNB
b
u
f
f
er
o
f
u
s
er
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at
ti
m
e
t,
N
is
th
e
to
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m
b
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er
s
an
d
T
is
t
h
e
to
tal
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i
m
u
latio
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m
e.
4.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
NS
T
h
e
m
ea
n
u
s
er
th
r
o
u
g
h
p
u
t
w
it
h
in
cr
ea
s
i
n
g
s
y
s
te
m
ca
p
ac
it
y
o
f
th
e
ev
al
u
ated
C
C
s
elec
tio
n
alg
o
r
ith
m
s
ar
e
s
h
o
w
n
in
Fi
g
u
r
e
2
.
I
t
c
an
b
e
o
b
s
er
v
ed
in
th
e
f
ig
u
r
e
th
at
th
e
m
ea
n
u
s
er
th
r
o
u
g
h
p
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t
d
eg
r
ad
es
w
it
h
in
cr
ea
s
i
n
g
s
y
s
te
m
ca
p
ac
it
y
.
T
h
is
is
b
ec
a
u
s
e
m
o
r
e
p
ac
k
et
s
a
v
aila
b
le
at
th
e
b
ase
s
ta
tio
n
b
u
f
f
er
as
m
o
r
e
u
s
er
s
ar
r
iv
e
in
to
th
e
s
y
s
te
m
.
Giv
e
n
t
h
at
t
h
er
e
ar
e
li
m
i
ted
R
B
s
in
ea
ch
C
C
to
(
r
e)
tr
an
s
m
it a
ll t
h
e
p
ac
k
ets
to
t
h
e
u
s
er
s
,
th
is
lead
s
to
th
e
d
eg
r
ad
atio
n
o
f
th
e
m
ea
n
u
s
er
th
r
o
u
g
h
p
u
t.
I
f
th
e
Qo
S
r
eq
u
ir
em
e
n
t
o
f
t
h
e
r
ea
l
-
ti
m
e
v
id
eo
is
to
b
e
s
atis
f
ied
at
2
3
4
.
7
k
b
p
s
m
ea
n
u
s
er
th
r
o
u
g
h
p
u
t
t
h
r
es
h
o
l
d
,
th
en
it
ca
n
b
e
o
b
s
er
v
ed
in
T
ab
le
1
th
at
C
T
A
alg
o
r
ith
m
s
u
p
p
o
r
ts
m
o
r
e
th
a
n
2
5
%
u
s
er
s
co
m
p
ar
ed
to
th
e
Ma
x
-
C
QI
alg
o
r
it
h
m
a
n
d
it
h
as
m
o
r
e
th
an
3
3
.
3
3
%
s
y
s
te
m
ca
p
ac
it
y
i
m
p
r
o
v
e
m
e
n
t
o
v
er
th
e
Q
u
e
u
e
-
L
en
g
t
h
,
R
an
d
o
m
a
n
d
L
ea
s
t
-
L
o
ad
C
C
s
e
le
ctio
n
al
g
o
r
ith
m
s
.
I
t
s
h
o
u
ld
b
e
n
o
ted
th
at
s
y
s
te
m
ca
p
ac
it
y
a
n
d
u
s
er
ar
e
u
s
ed
i
n
ter
ch
a
n
g
ea
b
l
y
h
er
ea
f
ter
.
A
d
d
itio
n
all
y
,
t
h
e
P
L
R
p
er
f
o
r
m
a
n
ce
s
o
f
th
e
f
i
v
e
C
C
s
elec
tio
n
a
lg
o
r
it
h
m
s
ar
e
i
llu
s
t
r
ated
in
Fi
g
u
r
e
3
.
P
L
R
d
eg
r
a
d
e
s
w
it
h
i
n
cr
ea
s
i
n
g
s
y
s
te
m
ca
p
ac
it
y
s
i
n
ce
m
o
r
e
p
ac
k
ets
ar
e
d
is
ca
r
d
ed
f
o
r
d
ela
y
v
io
latio
n
(
d
u
e
to
i
n
s
u
f
f
ici
en
t
R
B
s
w
i
th
g
o
o
d
ch
an
n
el
q
u
alit
y
to
(
r
e)
tr
an
s
m
it
all
th
e
p
ac
k
ets).
Fi
g
u
r
e
3
also
d
e
m
o
n
s
tr
ate
s
t
h
at
t
h
e
C
T
A
a
l
g
o
r
ith
m
i
s
ca
p
ab
le
to
m
in
i
m
ize
t
h
e
P
L
R
f
o
r
m
o
r
e
u
s
er
s
as c
o
m
p
ar
ed
to
th
e
o
th
e
r
C
C
s
elec
tio
n
alg
o
r
it
h
m
s
.
T
h
e
s
ig
n
i
f
ican
t
i
m
p
r
o
v
e
m
e
n
t
in
t
h
e
C
T
A
a
s
co
m
p
ar
ed
to
t
h
e
o
th
er
C
C
s
elec
tio
n
al
g
o
r
it
h
m
s
ca
n
b
e
ex
p
lain
ed
a
s
f
o
llo
w
s
.
T
h
e
Qu
e
u
e
-
L
e
n
g
th
,
R
a
n
d
o
m
a
n
d
L
ea
s
t
-
L
o
ad
ar
e
lo
ad
-
b
ala
n
ce
d
C
C
s
elec
tio
n
alg
o
r
ith
m
s
.
A
C
C
i
s
as
s
i
g
n
e
d
to
ea
ch
n
e
w
l
y
-
ar
r
iv
ed
L
T
E
u
s
er
w
i
th
o
u
t
ta
k
i
n
g
th
e
u
s
er
’
s
a
v
er
ag
e
ch
a
n
n
el
q
u
alit
y
i
n
to
ac
co
u
n
t.
So
m
e
n
e
w
l
y
-
ar
r
iv
ed
L
T
E
u
s
er
s
lo
ca
t
ed
f
ar
th
er
a
w
a
y
f
r
o
m
t
h
e
b
a
s
e
s
tat
io
n
m
a
y
b
e
ass
i
g
n
ed
to
a
C
C
a
t a
h
ig
h
er
f
r
eq
u
en
c
y
w
h
ich
r
esu
lts
w
i
th
le
s
s
o
r
n
o
n
e
p
ac
k
et
s
ar
e
r
ec
eiv
e
d
(
th
ese
u
s
er
s
ar
e
i
n
d
ee
p
f
ad
e)
an
d
h
en
ce
d
eg
r
ad
in
g
t
h
e
m
ea
n
u
s
er
th
r
o
u
g
h
p
u
t
an
d
P
L
R
.
On
t
h
e
o
th
er
h
a
n
d
,
th
e
Ma
x
-
C
QI
s
h
o
w
n
to
h
av
e
b
etter
p
er
f
o
r
m
a
n
ce
as
co
m
p
ar
ed
to
th
e
lo
ad
-
b
alan
ce
d
C
C
s
elec
tio
n
al
g
o
r
ith
m
s
.
T
h
e
Ma
x
-
C
QI
m
a
k
es
d
ec
is
io
n
o
n
t
h
e
b
asis
o
f
t
h
e
a
v
er
ag
e
c
h
an
n
el
q
u
a
lit
y
o
f
ea
c
h
u
s
er
.
T
h
is
allo
w
s
a
n
e
w
l
y
-
a
r
r
iv
ed
L
T
E
u
s
er
to
en
j
o
y
(
r
e)
tr
an
s
m
is
s
io
n
o
n
R
B
s
o
f
C
C
w
i
th
g
o
o
d
ch
an
n
el
q
u
alit
y
(
s
ee
E
q
u
atio
n
1
)
.
Ho
w
ev
er
,
g
iv
e
n
t
h
at
th
e
Max
-
C
QI
al
w
a
y
s
as
s
ig
n
s
a
u
s
er
o
n
a
C
C
w
it
h
a
g
o
o
d
av
er
ag
e
ch
a
n
n
el
q
u
alit
y
,
in
t
h
e
in
ter
-
b
an
d
n
o
n
-
co
n
tig
u
o
u
s
C
A
,
t
h
er
e
is
h
i
g
h
l
y
lik
el
y
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h
at
m
aj
o
r
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f
L
T
E
an
d
L
T
E
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A
u
s
er
s
co
m
p
ete
f
o
r
r
eso
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r
ce
s
i
n
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e
C
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N
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T
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i
t
p
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x
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N
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h
r
o
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p
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e
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m
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a
n
1
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)
(
1
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p
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(
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(
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Fig
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u
r
e
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th
at
t
h
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x
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t
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m
aj
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co
m
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g
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o
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s
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it
h
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o
f
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r
eq
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en
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y
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h
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s
s
o
m
e
r
eso
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r
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s
in
o
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er
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s
ar
e
w
as
ted
as
o
n
l
y
s
m
al
l
n
u
m
b
er
o
f
L
T
E
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A
u
s
er
s
ar
e
(
r
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tr
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s
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it
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g
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ac
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o
n
t
h
ese
C
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s
.
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e
n
th
at
t
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a
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ch
a
n
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el
q
u
a
lit
y
o
n
a
C
C
o
f
all
u
s
er
s
ar
e
tak
e
n
in
to
ac
co
u
n
t
in
C
T
A
(
as
d
is
cu
s
s
ed
in
Secti
o
n
2
)
,
th
is
lead
s
to
u
s
er
s
to
b
e
ass
ig
n
ed
to
o
th
er
C
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s
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i.e
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in
s
tead
o
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co
m
p
eti
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g
f
o
r
r
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ce
s
i
n
a
C
C
at
a
lo
w
er
f
r
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en
c
y
)
a
n
d
t
h
u
s
all
o
w
i
n
g
th
e
C
T
A
to
m
ax
i
m
ize
its
p
er
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o
r
m
a
n
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.
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e
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ce
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ig
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m
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e
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m
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aj
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er
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h
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s
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te
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u
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e
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.
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p
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sys
t
e
m
c
a
p
a
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t
y
C
T
A
i
m
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r
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C
sel
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c
t
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l
g
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ri
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m
s (%
)
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>
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3
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R
a
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4
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e
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NCLU
SI
O
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E
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A
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s
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n
v
i
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ag
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to
p
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o
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ig
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ig
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ate
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A
m
et
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h
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et
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em
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f
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d
C
C
s
elec
tio
n
alg
o
r
it
h
m
s
w
h
e
n
th
e
s
y
s
te
m
is
o
p
er
atin
g
i
n
b
ac
k
w
ar
d
co
m
p
atib
le
m
o
d
e.
T
h
is
p
ap
er
s
tu
d
ies
a
n
u
m
b
er
o
f
C
C
s
e
lectio
n
al
g
o
r
ith
m
s
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o
r
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s
e
i
n
th
e
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n
ter
-
b
an
d
d
o
w
n
li
n
k
L
T
E
-
A
n
et
w
o
r
k
.
I
t
w
as
d
e
m
o
n
s
tr
ated
v
ia
a
s
er
ies
o
f
co
m
p
u
ter
s
i
m
u
latio
n
s
th
a
t
th
e
C
T
A
alg
o
r
ith
m
is
e
f
f
icien
t
in
m
ax
i
m
izin
g
t
h
e
s
y
s
te
m
ca
p
ac
i
t
y
w
h
ils
t
m
ee
ti
n
g
t
h
e
r
eq
u
ir
ed
Qo
S
o
f
r
ea
l
-
ti
m
e
v
id
eo
co
n
ten
t
i
n
th
e
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ter
-
b
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d
d
o
w
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l
in
k
L
TE
-
A
.
T
h
e
C
T
A
h
as
m
o
r
e
th
a
n
2
5
%
s
y
s
te
m
ca
p
ac
it
y
i
m
p
r
o
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e
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e
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t
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m
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ar
ed
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e
R
an
d
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m
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Qu
e
u
e
-
L
e
n
g
th
,
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ea
s
t
-
L
o
ad
an
d
Ma
x
-
C
QI
C
C
s
elec
tio
n
alg
o
r
ith
m
s
.
F
u
tu
r
e
s
t
u
d
ies
i
n
clu
d
e
p
er
f
o
r
m
an
ce
co
m
p
ar
is
o
n
o
f
C
T
A
w
it
h
o
th
er
C
C
s
elec
tio
n
alg
o
r
it
h
m
s
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th
e
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n
tr
a
-
b
an
d
co
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ti
g
u
o
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an
d
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n
-
co
n
t
ig
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o
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s
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T
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-
A
.
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d
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itio
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al
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y
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p
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f
th
e
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T
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n
s
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p
p
o
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ix
tu
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f
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d
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o
n
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r
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ti
m
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lti
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co
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te
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ts
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il
l b
e
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p
ar
t o
f
f
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t
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r
e
s
t
u
d
y
.
ACK
NO
WL
E
D
G
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M
E
NT
T
h
is
w
o
r
k
is
s
u
p
p
o
r
ted
b
y
I
n
ter
n
at
io
n
al
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s
la
m
ic
U
n
i
v
er
s
i
t
y
Ma
la
y
s
ia
R
esear
c
h
I
n
itia
ti
v
e
Gr
an
t
(
R
I
GS1
6
-
064
-
0
2
2
8
)
.
RE
F
E
R
E
NC
E
S
[1
]
C
h
e
n
g
Y
.
H
.
,
e
t
a
l
.
,
“
Qo
S
-
G
u
a
ra
n
tee
d
Ch
a
n
n
e
l
-
A
wa
re
S
c
h
e
d
u
li
n
g
a
n
d
Re
so
u
rc
e
G
ro
u
p
i
n
g
u
n
d
e
r
N
o
n
-
F
u
ll
B
u
f
f
e
r
T
ra
ff
ic
f
o
r
LT
E
-
A
Ne
t
w
o
rk
s
,”
IEE
E
W
ire
les
s
Co
mm
u
n
ica
ti
o
n
s
a
n
d
Ne
two
rk
in
g
C
o
n
fer
e
n
c
e
(W
CNC)
,
S
a
n
F
ra
n
c
isc
o
,
CA
,
USA
,
P
p
.
1
-
6.
[2
]
IT
U
-
R
,
“
F
ra
m
e
w
o
rk
a
n
d
Ov
e
ra
ll
Ob
jec
ti
v
e
s
o
f
th
e
F
u
tu
re
De
v
e
lo
p
m
e
n
t
o
f
IM
T
-
2
0
0
0
a
n
d
S
y
ste
m
s
Be
y
o
n
d
IM
T
-
2
0
0
0
,”
2
0
0
3
.
[3
]
IT
U
-
R
,
“
Ba
c
k
g
ro
u
n
d
o
n
IM
T
-
A
d
v
a
n
c
e
d
,”
2
0
0
8
.
[4
]
W
a
n
g
Q
.
,
e
t
a
l.
,
“
A
Qo
S
-
G
u
a
ra
n
tee
d
Ra
d
io
Re
so
u
rc
e
S
c
h
e
d
u
li
n
g
i
n
M
u
lt
i
-
Us
e
r
M
u
lt
i
-
S
e
rv
ice
LT
E
-
A
S
y
ste
m
s
w
it
h
Ca
rrier Ag
g
r
e
g
a
ti
o
n
,”
2
n
d
IEE
E
I
n
ter
n
a
ti
o
n
a
l
C
o
n
fer
e
n
c
e
o
n
C
o
mp
u
ter
a
n
d
Co
mm
u
n
ica
ti
o
n
s
,
p
p
.
2
9
2
7
-
32
,
2
0
1
6
.
[5
]
L
v
T
.
,
e
t
a
l.
,
“
No
v
e
l
Us
e
r
S
c
h
e
d
u
li
n
g
A
l
g
o
rit
h
m
s
f
o
r
Ca
rri
e
r
Ag
g
re
g
a
ti
o
n
S
y
ste
m
in
He
tero
g
e
n
e
o
u
s
Ne
tw
o
rk
,”
IEE
E
W
ire
les
s Co
mm
u
n
ica
t
io
n
s a
n
d
Ne
tw
o
rk
in
g
C
o
n
fer
e
n
c
e
(
W
C
N
C)
,
p
p
.
1
-
6.
[6
]
L
e
e
H
.
,
e
t
a
l.
,
“
A
S
u
rv
e
y
o
f
Ra
d
io
Re
so
u
rc
e
M
a
n
a
g
e
m
e
n
t
f
o
r
S
p
e
c
t
ru
m
A
g
g
re
g
a
ti
o
n
i
n
L
T
E
-
A
d
v
a
n
c
e
d
,”
IEE
E
Co
mm
u
n
ica
ti
o
n
S
u
rv
e
y
s
&
T
u
to
ria
ls
,
v
o
l/
iss
u
e
:
1
6
(1
2
)
,
p
p
.
7
4
3
-
6
0
,
2
0
1
4
.
[7
]
Hu
a
W
.
,
e
t
a
l.
,
“
P
e
rf
o
rm
a
n
c
e
An
a
ly
sis
o
f
Do
w
n
li
n
k
In
ter
-
Ba
n
d
Ca
rrier
A
g
g
re
g
a
ti
o
n
in
L
T
E
-
A
d
v
a
n
c
e
d
,”
IEE
E
Veh
icu
la
r
T
e
c
h
n
o
lo
g
y
Co
n
fer
e
n
c
e
(
VT
C
Fa
ll
)
,
1
-
5.
[8
]
Ra
m
li
H
.
A
.
M
.
,
e
t
a
l.
,
“
A
n
I
m
p
ro
v
e
d
Co
m
p
o
n
e
n
t
Ca
rrier S
e
lec
ti
o
n
A
lg
o
rit
h
m
f
o
r
Do
w
n
li
n
k
L
o
n
g
T
e
r
m
Ev
o
lu
ti
o
n
-
A
d
v
a
n
c
e
d
,”
In
ter
n
a
ti
o
n
a
l
Co
n
fer
e
n
c
e
o
n
Co
mp
u
ter
a
n
d
Co
mm
u
n
i
c
a
ti
o
n
En
g
in
e
e
rin
g
,
Ku
a
la
L
u
m
p
u
r
,
pp.
2
0
1
-
4
,
2
0
1
4
.
[9
]
Yo
n
is
A
.
Z
.
,
e
t
a
l.
,
“
De
sig
n
a
n
d
Im
p
le
m
e
n
tatio
n
o
f
In
tra
Ba
n
d
Co
n
ti
g
u
o
u
s
Co
m
p
o
n
e
n
t
Ca
rriers
o
n
L
T
E
-
A
,”
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
C
o
m
p
u
ter
Ap
p
l
ica
ti
o
n
s
,
v
o
l/
issu
e
:
4
1
(
1
4
)
,
p
p
.
25
-
30
,
2
0
1
2
.
[1
0
]
F
a
n
W
.
,
e
t
a
l.
,
“
A
C
a
rrier
Ag
g
r
e
g
a
ti
o
n
Ba
se
d
Re
so
u
rc
e
A
ll
o
c
a
ti
o
n
S
c
h
e
m
e
f
o
r
P
e
rv
a
siv
e
W
irele
ss
Ne
t
w
o
rk
s
,”
IEE
E
Nin
th
I
n
ter
n
a
ti
o
n
a
l
Co
n
fer
e
n
c
e
o
n
De
p
e
n
d
a
b
le,
Au
t
o
n
o
mic
a
n
d
S
e
c
u
re
Co
mp
u
ti
n
g
(
DAS
C)
,
p
p
.
1
9
6
-
2
0
1
.
[1
1
]
Al
-
Ka
tsh
a
M
.
Z
.
a
n
d
Ra
m
li
H
.
A
.
M.
,
“
De
v
e
lo
p
m
e
n
t
o
f
a
No
v
e
l
Co
m
p
o
n
e
n
t
Ca
rrier
S
e
lec
ti
o
n
A
l
g
o
rit
h
m
in
L
o
n
g
T
e
r
m
Ev
o
lu
ti
o
n
-
A
d
v
a
n
c
e
d
(L
TE
-
A
)
w
it
h
Ca
rrier
A
g
g
re
g
a
ti
o
n
,”
IEE
E
S
tu
d
e
n
t
C
o
n
fer
e
n
c
e
o
n
Res
e
a
rc
h
a
n
d
D
e
v
e
lo
p
me
n
t
,
p
p
.
1
-
5.
[1
2
]
Ra
m
li
H
.
A
.
M
.
,
e
t
a
l.
,
“
A
S
u
rv
e
y
o
f
Co
m
p
o
n
e
n
t
Ca
rrier
S
e
lec
ti
o
n
A
lg
o
rit
h
m
s
f
o
r
Ca
rrier
A
g
g
re
g
a
ti
o
n
in
L
o
n
g
T
e
r
m
Ev
o
lu
ti
o
n
-
A
d
v
a
n
c
e
d
,”
In
te
rn
a
ti
o
n
a
l
C
o
n
fer
e
n
c
e
o
n
S
ma
rt
I
n
stru
me
n
ta
ti
o
n
s,
M
e
a
su
re
me
n
t
a
n
d
Ap
p
li
c
a
ti
o
n
s
,
P
u
traja
y
a
,
M
a
la
y
sia
,
2
0
1
7
.
[1
3
]
L
u
c
re
z
ia
F
.
,
e
t
a
l.
,
“
A
P
ro
p
o
sa
l
f
o
r
En
d
-
to
-
E
n
d
Q
o
S
P
ro
v
isi
o
n
i
n
g
in
S
o
f
twa
re
-
De
f
in
e
d
Ne
t
w
o
rk
s
,”
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
El
e
c
trica
l
En
g
in
e
e
rin
g
a
n
d
Co
m
p
u
ter
S
c
ien
c
e
,
v
o
l/
issu
e
:
7
(4
)
,
p
p
.
2
2
7
8
-
86
,
2
0
1
7
.
[1
4
]
A
u
d
a
h
L
.
,
e
t
a
l.
,
“
Qo
S
b
a
se
d
A
d
m
issio
n
Co
n
tr
o
l
u
si
n
g
M
u
lt
i
p
a
th
S
c
h
e
d
u
ler
f
o
r
I
P
o
v
e
r
S
a
te
ll
it
e
Ne
tw
o
rk
s
,”
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
E
lec
trica
l
En
g
in
e
e
rin
g
a
n
d
Co
mp
u
ter
S
c
ie
n
c
e
,
v
o
l/
issu
e
:
7
(6
)
,
p
p
.
2
9
2
9
-
35
,
2
0
1
7
.
[1
5
]
Yu
a
n
y
e
W
.
,
e
t
a
l.
,
“
Ca
rrier
L
o
a
d
Ba
lan
c
in
g
a
n
d
P
a
c
k
e
t
S
c
h
e
d
u
li
n
g
f
o
r
M
u
lt
i
-
Ca
rrier
S
y
ste
m
s
,”
IEE
E
T
ra
n
sa
c
t
io
n
s
o
n
W
ire
les
s Co
mm
u
n
ic
a
ti
o
n
s
,
v
o
l
/i
ss
u
e
:
9
(
5
)
,
p
p
.
1
7
8
0
-
9
,
2
0
1
0
.
[1
6
]
Zh
a
n
g
L
.
,
e
t
a
l.
,
“
P
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