# US 2010/0165935 A1 · Method of mapping resource unit in wireless communication system

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- Number: US 2010/0165935 A1
- Document ID: US20100165935A1
- Status: Published application
- Kind: A1
- Application number: 12/604,167
- Filed: 2009-10-22
- Published: 2010-07-01
- Earliest claimed: 2008-10-22
- Assignees: LG Electronics Inc.
- Inventors: Han Gyu CHO; Jinsoo CHOI; Jin Sam KWAK; Seung Hyun KANG; Sung Ho MOON
- Web page: https://patentgrep.com/patent/US20100165935A1

## CPC

- H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another}
- H04L 5/0041: {Frequency-non-contiguous}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method and an apparatus of mapping a resource unit is provided. Physical resource units (PRUs) are divided into a plurality of PRU sets. The PRUs are mapped to a subband PRU or a miniband PRU in a granularity of the PRU set. The mapping is based on the greatest common divisor of the maximum number of PRU sets. The resource unit can be effectively mapped while maximizing a frequency diversity gain of a subband PRU and a miniband PRU.

## Claims

### Claim 1

A method of mapping a resource unit, the method comprising:
dividing physical resource units (PRUs) into a plurality of PRU sets; and
mapping the PRUs to a subband PRU or a miniband PRU in a granularity of the PRU set,
wherein the PRU set comprises a plurality of contiguous PRUs, and the mapping is based on the greatest common divisor of Nsub and
⌈
N
sub
K
SB
⌉
,
where Nsub denotes the maximum number of PRU sets and KSB denotes the number of PRU sets mapped to the subband PRU.

### Claim 2 (depends on 1)

The method of claim 1, wherein the mapping to the subband PRU is based on Equation (E-1):
PRUSB[j]=PRU[i], j=0, 1, . . . , LSB−1 (E-1),
where i can be expressed by Equation (E-2):
i
=
N
1
·
{
⌈
N
sub
K
SB
⌉
·
⌊
j
N
1
⌋
+
⌊
⌊
j
N
1
⌋
·
GCD

(
N
sub
,
⌈
N
sub
K
SB
⌉
)
N
sub
⌋
}

mod

{
N
sub
}
+
{
j
}

mod

{
N
1
}
,
(
E

-

2
)
where i denotes an index of a PRU, j denotes an index of a subband PRU, LSB denotes the number of PRUs mapped to the subband PRU, and N1 denotes the number of PRUs included in one PRU set.

### Claim 3 (depends on 1)

The method of claim 1, wherein the mapping to the miniband PRU is based on Equation (E-3):
PRUMB[k]=PRU[i], k=0, 1, . . . , LMB−1 (E-3),
where i can be expressed by Equation (E-4):
i
=
{
N
1
·
{
⌈
N
sub
K
SB
⌉
·
⌊
k
+
L
SB
N
1
⌋
+
⌊
⌊
k
+
L
SB
N
1
⌋
·
GCD

(
N
sub
,
⌈
N
sub
K
SB
⌉
)
N
sub
⌋
}

mod

{
N
sub
}
+
{
k
+
L
SB
}

mod

{
N
1
}
,
K
SB
>
0
k
,
K
SB
=
0
,
(
E

-

4
)
where i denotes an index of a PRU, k denotes an index of a miniband PRU, LMB denotes the number of PRUs mapped to a miniband PRU, N1 denotes the number of PRUs included in one PRU set, Nsub denotes the maximum number of PRU sets, and KSB denotes the number of PRU sets mapped to the subband PRU.

### Claim 4

A data transmission method of a user equipment in a wireless communication system, the method comprising:
mapping a subband PRU to a PRU in a granularity of a PRU set; and
transmitting data by using the PRU,
wherein the subband PRU is allocated with at least one subband comprising a plurality of contiguous PRUs, the PRU set comprises PRUs whose total number is equal to the number of the plurality of contiguous PRUs included in one subband, and the mapping to the PRU is performed based on the maximum number of PRU sets and the number of PRU sets mapped to the subband PRU.

### Claim 5 (depends on 4)

The method of claim 4, wherein the mapping to the PRU is based on Equation (E-5):
PRUSB[j]=PRU[i], j=0, 1, . . . , LSB−1 (E-5),
where i can be expressed by Equation (E-6):
i
=
N
1
·
{
⌈
N
sub
K
SB
⌉
·
⌊
j
N
1
⌋
+
⌊
⌊
j
N
1
⌋
·
GCD

(
N
sub
,
⌈
N
sub
K
SB
⌉
)
N
sub
⌋
}

mod

{
N
sub
}
+
{
j
}

mod

{
N
1
}
,
(
E

-

6
)
where i denotes an index of a PRU, j denotes an index of a subband PRU, LSB denotes the number of PRUs mapped to the subband PRU, N1 denotes the number of PRUs included in one PRU set, Nsub denotes the maximum number of PRU sets, and KSB denotes the number of PRU sets mapped to the subband PRU.

### Claim 6

A data processing method of a user equipment in a wireless communication system, the method comprising:
receiving data by using a PRU; and
mapping the PRU to a subband PRU in a granularity of a PRU set,
wherein the subband PRU is allocated with at least one subband comprising a plurality of contiguous PRUs, the PRU set comprises PRUs whose total number is equal to the number of the plurality of contiguous PRUs included in one subband, and the mapping to the subband PRU is performed based on the maximum number of PRU sets and the number of PRU sets mapped to the subband PRU.

### Claim 7 (depends on 6)

The method of claim 6, wherein the mapping to the subband PRU is based on Equation (E-7):
PRUSB[j]=PRU[i], j=0, 1, . . . , LSB−1 (E-7),
where i can be expressed by Equation (E-8):
i
=
N
1
·
{
⌈
N
sub
K
SB
⌉
·
⌊
j
N
1
⌋
+
⌊
⌊
j
N
1
⌋
·
GCD

(
N
sub
,
⌈
N
sub
K
SB
⌉
)
N
sub
⌋
}

mod

{
N
sub
}
+
{
j
}

mod

{
N
1
}
,
(
E

-

8
)
where i denotes an index of a PRU, j denotes an index of a subband PRU, LSB denotes the number of PRUs mapped to the subband PRU, N1 denotes the number of PRUs included in one PRU set, Nsub denotes the maximum number of PRU sets, and KSB denotes the number of PRU sets mapped to the subband PRU.

### Claim 8

A user equipment comprising:
a radio frequency (RF) unit for transmitting and receiving a radio signal; and
a processor operatively coupled to the RF unit and configured to:
divide physical resource units (PRUs) into a plurality of PRU sets; and
map the PRUs to a subband PRU or a miniband PRU in a granularity of the PRU set,
wherein the PRU set comprises a plurality of contiguous PRUs, and the mapping is based on the greatest common divisor of Nsub and
⌈
N
sub
K
SB
⌉
,
where Nsub denotes the maximum number of PRU sets and KSB denotes the number of PRU sets mapped to the subband PRU.