APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A SINGLE CARRIER-FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM

• US 20080212556A1
• Filed: 01/09/2008
• Published: 09/04/2008
• Est. Priority Date: 01/09/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Joon-Young, Lee, Ju-Ho, Cho, Yun-Ok, Ro, Sang-Min, HEO, Youn-Hyoung
• Granted Patent: US 9,072,096 B2
• Time in Patent Office: Days
• US Class Current: 370/344
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 2001/7154 with means for preventing interference
• CPC Class Codes: H04J 13/18 Allocation of orthogonal codes
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B performs inter-subband hopping on a resource unit for a User Equipment (UE) on a frequency axis along which at least two subbands are defined, at each predetermined hopping time, determines whether to turn on or off mirroring in a subband having the hopped resource unit on a cell basis at the each hopping time, selects a resource unit by selectively mirroring the hopped unit according to the determination, and allocates the selected resource unit to the UE.

Claims

1. A method for allocating resources to a User Equipment (UE) in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system, comprising:

performing inter-subband hopping on a resource unit for the UE on a frequency axis along which at least two subbands are defined, at each predetermined hopping time;

determining whether to turn on or off mirroring in a subband having the hopped resource unit on a cell basis at the each hopping time; and

selecting a resource unit by selectively mirroring the hopped resource unit according to the determination and allocating the selected resource unit to the UE.

2. The method of claim 1, further comprising generating sequences each indicating mirroring-on or mirroring-off at a plurality of hopping times and allocating the sequences to cells, before the selective mirroring, wherein the determination comprises determining whether to turn on or off the mirroring according to a bit value of a sequence allocated on a cell basis.

3. The method of claim 1, wherein the resource unit for the UE is one of a resource unit allocated to the UE at a previous hopping time and a resource unit used for a previous transmission of a same Hybrid Automatic Repeat reQuest (HARQ) process for data.

4. The method of claim 2, wherein each of the sequences is one of a cell-specific orthogonal code selected from a set of orthogonal codes and a Pseudo-Noise (PN) sequence having a cell-specific seed.

5. The method of claim 1, further comprising, if the subbands have different numbers of resource units,

determining mirroring-on or mirroring-off along the frequency axis within the subband having the resource unit for the UE on a cell basis, at the each hopping time;

determining a position to which the resource unit for the UE is to hop according to an index of the resource unit; and

selecting a resource unit by performing frequency hopping and mirroring according to the determined position and the determined mirroring-on or mirroring-off and allocating the selected resource unit to the UE.

6. The method of claim 1, wherein the selective mirroring comprises always performing mirroring at predetermined inter-subframe hopping times and selectively performing mirroring at intra-subframe hopping times according to the determination.

7. A method for being allocated resources from a Node B in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system, comprising:

performing inter-subband hopping on a resource unit for a User Equipment (UE) on a frequency axis along which at least two subbands are defined, at each predetermined hopping time;

determining whether to turn on or off mirroring in a subband having the hopped resource unit at the each hopping time according to scheduling information received from the Node B; and

selecting a resource unit by selectively mirroring the hopped resource unit according to the determination and transmitting data in the selected resource unit to the Node B.

8. The method of claim 7, wherein the determination comprises determining whether to turn on or off mirroring the hopped resource unit according to a bit value of a cell-specific sequence indicating mirroring-on or mirroring-off at a plurality of hopping times, received from the Node B.

9. The method of claim 7, wherein the resource unit for the UE is one of a resource unit allocated to the UE at a previous hopping time and a resource unit used for a previous transmission of a same Hybrid Automatic Repeat reQuest (HARQ) process for data.

10. The method of claim 8, wherein the sequence is one of a cell-specific orthogonal code selected from a set of orthogonal codes and a Pseudo-Noise (PN) sequence having a cell-specific seed.

11. The method of claim 7, wherein the selective mirroring comprises always performing mirroring at predetermined inter-subframe hopping times and selectively performing mirroring at intra-subframe hopping times according to the determination.

12. The method of claim 7, further comprising, if the subbands have different numbers of resource units,

determining mirroring-on or mirroring-off along the frequency axis within the subband having the resource unit for the UE on a cell basis at the each hopping time according to the scheduling information received from the Node B;

determining a position to which the resource unit for the UE will hop according to the index of the resource unit; and

selecting a resource unit by performing frequency hopping and mirroring according to the determined position and the determined mirroring-on or mirroring-off and transmitting data in the selected resource unit to the Node B.

13. An apparatus of a Node B for allocating resources to User Equipments (UEs) in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system, comprising:

a scheduler for performing inter-subband hopping on resource units for the UEs on a frequency axis along which at least two subbands are defined, at each predetermined hopping time, determining whether to turn on or off mirroring in subbands having the hopped resource units on a cell basis at the each hopping time, and selecting resource units by selectively mirroring the hopped resource units according to the determination;

a mapper for separating data received from the UEs according to information about the selected resource units received from the scheduler; and

a decoder for decoding the separated data.

14. The apparatus of claim 13, further comprising a sequence generator for generating sequences for cells, each indicating mirroring-on or mirroring-off at a plurality of hopping times, wherein the scheduler determines whether to turn on or off mirroring according to bit values of the sequences allocated on a cell basis.

15. The apparatus of claim 13, wherein the scheduler performs mirroring with respect to one of resource units allocated to the UEs at a previous hopping time and resource units used for a previous transmission of a same Hybrid Automatic Repeat reQuest (HARQ) process for data.

16. The apparatus of claim 14, wherein the sequence generator generates cell-specific orthogonal codes for the cells from a set of orthogonal codes or Pseudo-Noise (PN) sequences having cell-specific seeds for the cells.

17. The apparatus of claim 13, wherein the scheduler always performs mirroring at predetermined inter-subframe hopping times and selectively performs mirroring at intra-subframe hopping times according to the determination.

18. The apparatus of claim 13, wherein if the subbands have different numbers of resource units, the scheduler determines mirroring-on or mirroring-off along the frequency axis within the subbands having the resource units for the UEs on a cell basis, at the each hopping time, determines positions to which the resource units for the UEs are to hop according to the indexes of the resource units, and selects resource units for the UEs by performing frequency hopping and mirroring according to the determined positions and the determined mirroring-on or mirroring-off.

19. An apparatus of a User Equipment (UE) for transmitting data to a Node B in a Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system, comprising:

a data transmission controller for performing inter-subband hopping on a resource unit for the UE on a frequency axis along which at least two subbands are defined, at each predetermined hopping time, and determining whether to turn on or off mirroring in a subband having the hopped resource unit at the each hopping time according to scheduling information received from the Node B; and

a mapper for mapping data to a resource unit selected by selective mirroring of the hopped resource unit according to the determination and transmitting the data in the mapped resource unit to the Node B.

20. The apparatus of claim 19, wherein the data transmission controller determines whether to turn on or off mirroring the hopped resource unit according to a bit value of a cell-specific sequence indicating mirroring-on or mirroring-off at a plurality of hopping times, received from the Node B, further comprising a sequence generator for generating the sequence.

21. The apparatus of claim 19, wherein the data transmission controller performs mirroring on a resource unit allocated to the UE at a previous hopping time or a resource unit used for a previous transmission of a same Hybrid Automatic Repeat reQuest (HARQ) process for data.

22. The apparatus of claim 20, wherein the sequence generator generates one of a cell-specific orthogonal code selected from a set of orthogonal codes and a Pseudo-Noise (PN) sequence having a cell-specific seed.

23. The apparatus of claim 19, wherein the data transmission controller always performs mirroring at predetermined inter-subframe hopping times and selectively performs mirroring at intra-subframe hopping times according to the determination.

24. The apparatus of claim 19, wherein if the subbands have different numbers of resource units, the data transmission controller determines mirroring-on or mirroring-off along the frequency axis within the subband having the resource unit for the UE on a cell basis at the each hopping time according to the scheduling information received from the Node B, determines a position to which the resource unit for the UE is to hop according to the index of the resource unit, and performs frequency hopping and mirroring according to the determined position and the determined mirroring-on or mirroring-off.