Method for signaling of resource allocation to adjust granularity in cellular multi-carrier system
A method of receiving downlink signals by a user equipment in a wireless mobile communication system, includes receiving downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users; detecting a resource indication value (RIV) from the resource block allocation information, wherein the RIV indicates a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs; and receiving the downlink signals on the consecutive virtual VRBs.
1. A method of receiving downlink signals by a user equipment in a wireless mobile communication system, the method comprising:
receiving downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users;
detecting a resource indication value (RIV) from the resource block allocation information, wherein the RIV indicates a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs; and
receiving the downlink signals on the consecutive virtual VRBs,
wherein the start index (S) is an element of a first set {s: s=mG<└N VRB /G┘·G} and the length (L) is an element of a second set {l: l=nG≦└N VRB /G┘·G},
where m is an integer of 0 or higher, n is an integer of 1 or higher, N VRB is the number of VRBs in a downlink system bandwidth, and G is an integer of 2 or higher.
2. The method of claim 1 , wherein, if Y−1≦└X/2┘ is given, the RIV is denoted by RIV=X(Y−1)+Z, or else the RIV is denoted by RIV=X(X−Y+1)+(X−1−Z),
where X is denoted by X=└N VRB /G┘, Y is denoted by Y=L/G, and Z is denoted by Z=S/G.
3. The method of claim 1 , wherein, a length (N bit — required ) of a bit field used for transmitting the RIV is denoted by N bit — required =┌ log 2 (RIV max +1)┐,
where RIV max =└N VRB /G┘·(└N VRB /G┘+1)/2−1.
4. The method of claim 1 , wherein G is 2 or 4.
5. The method of claim 1 , wherein the resource block allocation information indicates a set of distributed VRBs (DVRBs).
6. A user equipment for use in a wireless mobile communication system, the user equipment comprising:
a receiver; and
a processor, wherein the processor is configured to:
receive downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users,
detect a resource indication value (RIV) from the resource block allocation information, wherein the RIV indicates a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs, and
receive the downlink signals on the consecutive virtual VRBs,
wherein the start index (S) is an element of a first set {s: s=mG<└N VRB /G┘·G} and the length (L) is an element of a second set {l: l=nG≦└N VRB /G┘·G},
where m is an integer of 0 or higher, n is an integer of 1 or higher, N VRB is the number of VRBs in a downlink system bandwidth, and G is an integer of 2 or higher.
7. The user equipment of claim 6 , wherein, if Y−1≦└X/2┘ is given, the RIV is denoted by RIV=X(Y−1)+Z, or else the RIV is denoted by RIV=X(X−Y+1)+(X−1−Z),
where X is denoted by X=└N VRB /G┘, Y is denoted by Y=L/G, and Z is denoted by Z=S/G.
8. The user equipment of claim 6 , wherein, a length (N bit — required ) of a bit field used for transmitting the RIV is denoted by N bit — required =┌ log 2 (RIV max +1)┐,
where RIV max =└N VRB /G┘·(└N VRB /G┘+1)/2−1.
9. The user equipment of claim 6 , wherein G is 2 or 4.
10. The user equipment of claim 6 , wherein the resource block allocation information indicates a set of distributed VRBs (DVRBs).
11. A method of transmitting downlink signals by a base station in a wireless mobile communication system, the method comprising:
transmitting downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users, and wherein the resource block allocation information includes a resource indication value (RIV), the RIV indicating a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs; and
transmitting the downlink signals on the consecutive virtual VRBs,
wherein the start index (S) is an element of a first set {s: s=mG<└N VRB /G┘·G} and the length (L) is an element of a second set {l: l=nG≦└N VRB /G┘·G},
where m is an integer of 0 or higher, n is an integer of 1 or higher, N VRB is the number of VRBs in a downlink system bandwidth, and G is an integer of 2 or higher.
12. The method of claim 11 , wherein, if Y−1≦└X/2┘ is given, the RIV is denoted by RIV=X(Y−1)+Z, or else the RIV is denoted by RIV=X(X−Y+1)+(X−1−Z),
where X is denoted by X=└N VRB /G┘, Y is denoted by Y=L/G, and Z is denoted by Z=S/G.
13. The method of claim 11 , wherein, a length (N bit — required ) of a bit field used for transmitting the RIV is denoted by N bit — required =┌ log 2 (RIV max +1)┐,
where RIV max =└N VRB /G┘·(└N VRB /G┘+1)/2−1.
14. The method of claim 11 , wherein G is 2 or 4.
15. The method of claim 11 , wherein the resource block allocation information indicates a set of distributed VRBs (DVRBs).
16. A base station for use in a wireless mobile communication system, the base station comprising:
a transmitter; and
a processor, wherein the processor is configured to:
transmit downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users, and wherein the resource block allocation information includes a resource indication value (RIV), the RIV indicating a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs, and
transmit the downlink signals on the consecutive virtual VRBs,
wherein the start index (S) is an element of a first set {s: s=mG<└N VRB /G┘·G} and the length (L) is an element of a second set {l: l=nG≦└N VRB /G┘·G},
where m is an integer of 0 or higher, n is an integer of 1 or higher, N VRB is the number of VRBs in a downlink system bandwidth, and G is an integer of 2 or higher.
17. The base station of claim 16 , wherein, if Y−1≦└X/2┘ is given, the RIV is denoted by RIV=X(Y−1)+Z, or else the RIV is denoted by RIV=X(X−Y+1)+(X−1−Z),
where X is denoted by X=└N VRB /G┘, Y is denoted by Y=L/G, and Z is denoted by Z=S/G.
18. The base station of claim 16 , wherein, a length (N bit — required ) of a bit field used for transmitting the RIV is denoted by N bit — required =┌ log 2 (RIV max +1)┐,
where RIV max =└N VRB /G┘·(└N VRB /G┘+1)/2−1.
19. The base station of claim 16 , wherein G is 2 or 4.
20. The base station of claim 16 , wherein the resource block allocation information indicates a set of distributed VRBs (DVRBs).