FREQUENCY HOPPING PATTERN AND METHOD FOR TRANSMITTING UPLINK SIGNALS USING THE SAME

• US 20100284363A1
• Filed: 10/01/2008
• Published: 11/11/2010
• Est. Priority Date: 10/01/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Hyun Wook, Kim, Ki Jun, Yun, Young Woo, Ahn, Joon Kui, Yu, Nam Yul
• Granted Patent: US 8,416,835 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2621 Reduction thereof using phase offsets between subcarriers
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

A frequency hopping pattern and a method for transmitting uplink signals using the same are disclosed. A frequency hopping pattern is defined by combination of subband hopping, which is performed over one or more subbands divided from a system band for transmission of the uplink signals, and mirroring where resource blocks within one subband are arranged reversely based on the center of the subband. Sequences as to whether to apply minoring and subband hopping amount are cell-specific random numbers, and are generated independently or in combination.

Claims

1. A method for transmitting uplink signals in time domain transmission unit of a predetermined size, the method comprising:

mapping the uplink signals with a specific resource block index in a specific time domain transmission unit in accordance with a predetermined frequency hopping pattern including a subband hopping performed over one or more subbands divided from a system band for transmission of the uplink signals; and

transmitting the uplink signals through a resource block corresponding to the mapped resource block index,

wherein the subband hopping is defined such that the specific resource block index is mapped with an index obtained by performing cyclic shift to a predetermined reference index by an amount of a specific integer multiple (m) of a number of resource blocks included in the one subband within a range of a resource block region to which the frequency hopping is applied.

2. The method of claim 1, wherein the subband hopping is equally applied to transmission of uplink signals of all user equipments (UE) within a cell.

3. The method of claim 1, wherein the predetermined reference index is a resource block index used for transmission of the uplink signals in a previous time domain transmission unit followed by the specific time domain transmission unit or a resource block index scheduled from a base station.

4. The method of claim 1, wherein an integer value corresponding to the specific integer multiple is generated as a cell-specific random value.

5. The method of claim 4, wherein the cell-specific random value is given by an m-sequence generator which uses cell-specific information as an initial value.

6. The method of claim 5, wherein the specific integer multiple (m) is given by calculation operation which includes performing modular calculation for a state value (a) of a shift register of the m-sequence generator using an integer obtained by subtracting 1 from a number (M) of the subbands;

and adding 1 to the modular calculated value.

7. The method of claim 1, wherein resource blocks used for transmission of uplink signals of one user equipment (UE) are located in a single subband.

8. The method of claim 1, further comprising receiving uplink scheduling grant information as to whether to apply the frequency hopping.

9. The method of claim 1, wherein the predetermined frequency hopping pattern is defined to further include mirroring which allows resource blocks within one subband to be arranged reversely based on a center of the subband.

10. The method of claim 1, wherein the time domain transmission unit of the predetermined size is slot or subframe.

11. The method of claim 1, wherein a frequency hopping according to the predetermined frequency hopping pattern is used in a unit of an interlace unit in which HARQ process is operated.

12. A method for transmitting uplink signals in time domain transmission unit of a predetermined size, the method comprising:

mapping the uplink signals with a specific resource block index in accordance with a predetermined frequency hopping pattern; and

transmitting the uplink signals through a resource block corresponding to the mapped resource block index,

wherein the predetermined frequency hopping pattern is defined by combination of subband hopping, which is performed over one or more subbands divided from a system band for transmission of the uplink signals, and mirroring where resource blocks within one subband are arranged reversely based on a center of the subband, and

the subband hopping is defined that a resource block index used for transmission of the uplink signals in the specific time domain transmission unit is mapped to an index obtained by performing cyclic shift to a predetermined reference index by an amount of a specific integer multiple of a number of resource blocks included in one subband, within the range of a resource block region to which the frequency hopping is applied.