Method and apparatus for indicating allocation of distributed communication resources
View Patent ↗A user equipment (UE) receives downlink data using resource blocks in a wireless mobile communication system. The UE includes data processing circuitry coupled to a receiver that receives downlink control information including resource allocation information for the downlink data from a base station and to receive the downlink data mapped to physical resource blocks (PRBs) based on the downlink control information. The resource allocation information indicates virtual resource block (VRB) allocations for the user equipment. Each resource block corresponds to one time slot. A resource block pair includes a first resource block associated with a first time slot and a second resource block associated with a second time slot adjacent to the first time slot. The first and second resource blocks are allocated to the same frequency indices. A mapping relationship between VRB pairs and PRB pairs exists such that frequency consecutive VRB pairs are mapped to non-frequency consecutive PRB pairs and that each resource block pair is split so there is a frequency gap between the first and second parts of the resource block pair. The resource allocation information indicates the frequency gap size is one of a first value and a second different value.
1. A user equipment for receiving downlink data using resource blocks in a wireless mobile communication system, the user equipment comprising:
a processor configured to control an operation of the user equipment; and
a radio receiver configured to:
receive downlink control information including resource allocation information for a downlink data transmission; and
receive the downlink data mapped to physical resource blocks (PRBs) based on the downlink control information,
wherein:
the resource allocation information indicates virtual resource block (VRB) allocations for the user equipment,
indexes of the PRBs to which the downlink data are mapped are determined based on a mapping relationship between virtual resource blocks (VRBs) and the PRBs,
the mapping relationship is defined as indexes of the VRBs that are mapped to the indexes of the PRBs for a number of slots included in a subframe,
indexes of the PRBs for an odd-numbered slot are shifted with respect to indexes of the PRBs for an even-numbered slot based on a predetermined gap, and
an index of one of the PRBs on each of the number of slots that is mapped to an index of one of the VRBs is determined by using a value of the predetermined gap and a number of the VRBs.
2. The user equipment in claim 1 , wherein the number of slots of the subframe is denoted as N s , the value of the predetermined gap is denoted as N gap , and the number of the VRBs is denoted as N DVRB .
3. The user equipment in claim 2 , wherein:
the indexes of the VRBs are interleaved;
an index o 1,d of one of the PRBs on the odd-numbered slot of N s slots mapped to a given index d of one of the VRBs is set to p 1,d +N gap −N DVRB /2 if a temporary index p 1,d of one of the PRBs on the odd-numbered slot mapped to the index d is larger than or equal to N DVRB /2;
an index o 2,d of the one of the PRBs on the even-numbered slot of N s slots mapped to the index d is set to p 2,d +N gap −N DVRB /2 if a temporary index p 2,d of one of the PRBs on the even-numbered slot mapped to the index d is larger than or equal to N DVRB /2; and
d has an integer value in a range from 0 to N DVRB −1, and p 1,d , p 2,d , o 1,d , and o 2,d have an integer value in a range from 0 to N PRB −1, N PRB being a number of the PRBs.
4. The user equipment in claim 3 , wherein:
the temporary index p 1,d is given by:
p
1
,
d
=
{
p
1
,
d
′
,
when
N
null
=
0
or
(
d
<
N
DVRB
-
N
null
and
mod
(
d
,
C
)
<
2
)
p
1
,
d
′
-
N
null
/
2
,
when
N
null
≠
0
and
(
d
<
N
DVRB
-
N
null
and
mod
(
d
,
C
)
≥
2
)
where
p
1
,
d
′
=
mod
(
d
,
C
)
·
R
+
⌊
d
/
C
⌋
p
1
,
d
=
{
p
1
,
d
′
-
R
+
N
null
/
2
,
when
N
null
≠
0
and
(
d
≥
N
DVRB
-
N
null
and
mod
(
d
,
C
/
2
)
=
0
)
p
1
,
d
′
-
R
,
when
N
null
≠
0
and
(
d
≥
N
DVRB
-
N
null
and
mod
(
d
,
C
/
2
)
=
1
)
where
p
1
,
d
′
=
mod
(
d
,
C
/
2
)
·
2
R
+
⌊
2
d
/
C
⌋
;
and
the temporary index p 2,d is given by:
p 2,d =mod( p 1,d N DVRB /2, N DVRB ),
where R is a number of interleaving rows, C is a number of interleaving columns, and ‘mod’ means a modulo operation.
5. The user equipment in claim 1 , wherein the resource allocation includes a resource block group (RBG) having consecutive PRBs, and the gap is a multiple of a square of a number of the consecutive PRBs constituting the RBG.
6. The user equipment in claim 1 , wherein the receiver is configured to receive a resource indication value (RIV), and wherein processor is configured to use the RIV to determine the indexes of the VRBs, a start index number of the VRBs, and a length of the VRBs.
7. The user equipment in claim 1 , wherein N DVRB is an integer multiple of a diversity order.
8. A method for receiving downlink data at a user equipment using resource blocks in a wireless mobile communication system, the method comprising:
receiving, by a radio receiver, downlink control information including resource allocation information for a downlink data transmission;
receiving and processing the downlink data mapped to physical resource blocks (PRBs) based on the downlink control information,
wherein:
the resource allocation information indicates virtual resource block (VRB) allocations for the user equipment,
indexes of the PRBs to which the downlink data are mapped are determined based on a mapping relationship between virtual resource blocks (VRBs) and the PRBs,
the mapping relationship is defined as indexes of the VRBs that are mapped to the indexes of the PRBs for a number of slots included in a subframe,
indexes of the PRBs for an odd-numbered slot are shifted with respect to indexes of the PRBs for an even-numbered slot based on a predetermined gap, and
an index of one of the PRBs on each of the number of slots that is mapped to an index of one of the VRBs is determined by using a value of the predetermined gap and a number of the VRBs.
9. The method in claim 8 , wherein the number of slots of the subframe is denoted as N s , the value of the predetermined gap is denoted as N gap , and the number of the VRBs is denoted as N DVRB .
10. The method in claim 9 , wherein:
the indexes of the VRBs are interleaved;
an index o 1,d of one of the PRBs on the odd-numbered slot of N s slots mapped to a given index d of one of the VRBs is set to p 1,d +N gap −N DVRB /2 if a temporary index p 1,d of one of the PRBs on the odd-numbered slot mapped to the index d is larger than or equal to N DVRB /2;
an index o 2,d of the one of the PRBs on the even-numbered slot of N s slots mapped to the index d is set to p 2,d +N gap −N DVRB /2 if a temporary index p 2,d of one of the PRBs on the even-numbered slot mapped to the index d is larger than or equal to N DVRB /2; and
d has an integer value in a range from 0 to N DVRB −1, and p 1,d , p 2,d , o 1,d , and o 2,d have an integer value in a range from 0 to N PRB −1, N PRB being a number of the PRBs.
11. The method in claim 10 , wherein:
the temporary index p 1,d is given by:
p
1
,
d
=
{
p
1
,
d
′
,
when
N
null
=
0
or
(
d
<
N
DVRB
-
N
null
and
mod
(
d
,
C
)
<
2
)
p
1
,
d
′
-
N
null
/
2
,
when
N
null
≠
0
and
(
d
<
N
DVRB
-
N
null
and
mod
(
d
,
C
)
≥
2
)
where
p
1
,
d
′
=
mod
(
d
,
C
)
·
R
+
⌊
d
/
C
⌋
p
1
,
d
=
{
p
1
,
d
′
-
R
+
N
null
/
2
,
when
N
null
≠
0
and
d
(
≥
N
DVRB
-
N
null
and
mod
(
d
,
C
/
2
)
=
0
)
p
1
,
d
′
-
R
,
when
N
null
≠
0
and
(
d
≥
N
DVRB
-
N
null
and
mod
(
d
,
C
/
2
)
=
1
)
where
p
1
,
d
′
=
mod
(
d
,
C
/
2
)
·
2
R
+
⌊
2
d
/
C
⌋
;
and
the temporary index p 2,d is given by:
p 2,d =mod( p 1,d +N DVRB /2, N DVRB )
where R is a number of interleaving rows, C is a number of interleaving columns, and ‘mod’ means a modulo operation.
12. The method in claim 8 , wherein the resource allocation includes a resource block group (RBG) having consecutive PRBs, and the gap is a multiple of a square of a number of the consecutive PRBs constituting the RBG.
13. The method in claim 8 , wherein the receiver is configured to receive a resource indication value (RIV), and wherein processor is configured to use the RIV to determine the indexes of the VRBs, a start index number of the VRBs, and a length of the VRBs.
14. The method in claim 8 , wherein N DVRB is an integer multiple of a diversity order.