KR100942289B1 - Method and apparatus for resource allocation in single carrier frequency division multiple access system - Google Patents

Abstract

The present invention relates to a resource allocation method and apparatus for increasing frequency diversity and interference randomization effect while maintaining a single carrier characteristic in a wireless communication system using a single carrier frequency division multiple access scheme. In the present invention, in implementing a mirroring method which is one of frequency hopping methods for maintaining a single carrier characteristic, whether or not mirroring is applied to increase interference randomization effect is determined according to a value generated through a random sequence. I would like to suggest. When the above method is applied, the method of mirroring each cell is not overlapped as much as possible, so that not only frequency diversity can be obtained but also interference randomization effect can be increased.

SC-FDMA, uplink, frequency hopping, mirroring, random sequence

Description

Resource allocation method and apparatus in single carrier frequency division multiple access system {METHOD AND APPARATUS FOR RESOURCE ALLOCATION IN SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM}

The present invention efficiently controls a packet data channel and a control channel in the same transmission interval in a wireless communication system using a single carrier frequency division multiple access (SC-FDMA) method. A method and apparatus for allocating channel transmission resources.

1 illustrates a transmitter structure of a localized FDMA (LFDMA) system among SC-FDMA systems. Although FIG. 1 illustrates a method using a Discrete Fourier Transform (hereinafter referred to as DFT) and an Inverse Fast Fourier Transform (hereinafter referred to as IFFT), other transmitter implementation methods are possible.

The implementation using DFT and IFFT as shown in FIG. 1 has the advantage of facilitating change of LFDMA system parameters with low hardware complexity. Looking at the difference between OFDM and SC-FDMA in terms of transmitter structure, the LFDMA transmitter is not only an IFFT 102 used for multi-carrier transmission in an OFDM transmitter, but also a DFT precoder 101 is placed in front of the IFFT 102. Is added to In FIG. 1, the transmission modulation symbol 103 is input to the DFT 101 in units of blocks. When the DFT 101 output is mapped to the IFFT 102 input, it is sent occupying a band of adjacent subcarriers. The mapper 104 maps the transmission modulation symbol to the frequency band actually used.

2 is a diagram illustrating an example in which a terminal transmits data through any allocated resource in a typical SC-FDMA system.

In FIG. 2, one resource unit (hereinafter referred to as RU) represented by reference numeral 201 includes one or a plurality of subcarriers in the frequency domain and one or several SC-FDMA symbols in the time domain. do. In FIG. 2, the parts indicated by hatched lines indicate a case where two RUs are allocated for data transmission of UE 1, and the parts indicated by dots indicate a case where three RUs are allocated for data transmission of UE 2.

Referring to FIG. 2, the RUs used by the terminal 1 and the terminal 2 to transmit data continuously use a constant frequency band without changing in time. The resource allocation method or data transmission method as described above is widely used to maximize system performance through limited system resources by selecting and allocating resources in a frequency domain having a good channel state to each terminal. For example, in FIG. 2, the radio channel characteristic of the terminal 1 is relatively better than the other frequency region in which the portion indicated by hatching is in the frequency domain, and the radio channel characteristic of the terminal 2 is different in frequency indicated by the dot in the frequency domain. This is a relatively good case compared to the area. A method of selectively allocating resources by selecting a frequency domain having a good channel response in the frequency domain as described above is commonly referred to as frequency selective resource allocation or frequency selective scheduling. In the above description, data transmission from the terminal to the base station is exemplified for ease of explanation, but the same may be applied to the data transmission from the downlink, ie, the base station to the terminal. That is, even in the downlink, RUs indicated by hatching and dots in FIG. 2 indicate resources used when the base station transmits data to the terminal 1 and resources used when the base station transmits data to the terminal 2.

However, the frequency selective scheduling is not always easy. For example, in the case of a terminal moving at high speed, the frequency selective scheduling is not easy because the channel state changes rapidly. In other words, the base station scheduler selects a frequency region having a relatively good channel state to a predetermined terminal and allocates the resource to the terminal. The terminal receives resource allocation information from the base station and attempts to actually transmit data through the allocated resource. This is because the channel environment has already changed much compared to the time when the base station allocates resources to the terminal, and thus it is not possible to guarantee that the selected band is in a relatively good channel state for the terminal.

Even if a small amount of frequency resources are required for data transmission such as Voice over Internet Protocol (VoIP) service, signaling overhead may be large when the UE reports channel status for frequency selective scheduling. When frequency selective scheduling is not easy, it is more effective to use a frequency hopping method.

3 is a diagram illustrating an example in which a frequency hopping scheme is used in a conventional FDMA system.

Referring to FIG. 3, it can be seen that a frequency resource used for transmitting data by one UE is continuously changing in time. The frequency hopping process as described above has an effect of randomizing channel quality and interference during data transmission. In other words, since data is transmitted using resources of different frequency domains at each time point, the data transmitted at each time point has different channel characteristics, and the frequency domain used is different each time, so that interference signals are received from different terminals every time in neighboring cells. Since the interference amount is changed at every transmission time, a diversity effect can be obtained.

However, in the SC-FDMA system, as shown in FIG. 3, it is difficult to perform frequency hopping with the position of the RU used independently having a predetermined pattern. For example, in FIG. 3, if the RUs of 301 and 302 are allocated to different terminals, there is no problem. However, if all the RUs of 301 and 302 are allocated to one terminal, frequency hopping is applied at the next transmission time. Hops to the positions 303 and 304, respectively, so that it is not a continuous RU. Therefore, the terminal cannot transmit data through the two RUs.

Therefore, in order to obtain frequency diversity in SC-FDMA system, a mirroring method rather than a frequency hopping method is proposed and discussed.

4 is a view for explaining a mirroring method.

The mirroring method discussed in the related art is a method of symmetrically moving the RU with respect to the center frequency in the frequency band for transmitting the entire data. For example, the RU located at 401 in Cell A moves to position 403 at the next transmission time, and the RU located at 402 moves to position 404 at the next transmission time. Similarly, the RU located at 405 in Cell B moves to position 406 at the next transmission time. Using the mirroring method as described above has a merit that frequency hopping can be performed while satisfying a single carrier property since successive RUs move without falling.

However, the frequency hopping method for obtaining frequency diversity has a disadvantage in that the pattern is fixed as one because there is no way to move the RU other than the mirroring method of changing the position of the RU with respect to the center frequency. Thus, when this method is applied, frequency diversity can be obtained to some extent, but it is difficult to randomize interference. In detail, if mirroring is applied again after moving to the opposite RU, it moves to the original RU position, so there is only one applicable RU movement pattern. Therefore, even if there are several cells, each cell cannot have a different pattern.

Referring to FIG. 4, when the RU 401 indicated by a dot in Cell A is allocated to one terminal for a predetermined time and the RU 405 indicated by an outer line hatched in Cell B is assigned to another terminal, the mirroring method moves. Since there is only one pattern, the terminal continuously using the RU indicated by a dot receives interference from the terminal using the RU 405 indicated by the outer line. In this case, the terminal of Cell B is located close to Cell A, which causes great interference to the terminals located in Cell A. Therefore, the terminal using the RU indicated by a dot in Cell A has a poor reception quality.

An object of the present invention is to provide a resource allocation method and apparatus for randomizing interference between adjacent cells when a mirroring method is used to obtain frequency diversity.

To this end, the present invention determines whether mirroring is applied at every hopping time, and proposes a method for determining this with a different pattern for each cell and a transmission / reception apparatus therefor.

In addition, when the frequency hopping is supported in order to increase the frequency diversity effect, the present invention applies whether the frequency hopping support and mirroring is applied differently at each hopping time, and the method for determining with a different pattern for each cell and We propose a transceiver.

According to an embodiment of the present invention, in a method for allocating resources to a terminal in a single carrier frequency division multiple access communication system, predetermined hopping for a resource unit for a terminal on a frequency axis divided into two or more subbands Performing frequency hopping between sub-bands at each time point; determining whether to perform mirroring on a frequency axis for each cell in a sub-band in which the frequency-hopped resource unit is located at each hopping time point; and Selectively performing mirroring on the frequency hopping resource unit, and allocating a resource unit determined according to the mirroring result to the terminal.

In addition, according to an embodiment of the present invention, in a method for allocating resources from a base station in a single carrier frequency division multiple access communication system, on a frequency axis divided into two or more subbands, a resource unit for a terminal is predetermined. Performing frequency hopping between the subbands at each hopping time point, and determining whether to perform mirroring on a frequency axis within the subband where the frequency hopping resource unit is located according to information scheduled from the base station at each hopping time point. And selectively performing mirroring on the frequency hopping resource unit according to the determination, and transmitting data to the base station using the resource unit determined according to the mirroring result.

Further, according to an embodiment of the present invention, in a base station apparatus for allocating resources to terminals in a single carrier frequency division multiple access communication system, for a resource unit for a terminal on a frequency axis divided into two or more subbands, Perform frequency hopping between the subbands at a predetermined hopping time point, and determine whether to perform mirroring on a frequency axis for each cell in the subband where the frequency hopping resource unit is located at each hopping time point, and determine the frequency according to the determination. A scheduler that selectively mirrors a hopping resource unit to determine a resource unit to be allocated to the terminals, a mapper that classifies data received from the terminals for each terminal based on the resource unit information determined by the scheduler; Decoder for decoding the data classified for each terminal Include.

Further, according to an embodiment of the present invention, in a terminal device for transmitting data to a base station in a single carrier frequency division multiple access communication system, for a resource unit for a terminal on a frequency axis divided into two or more subbands, Performing frequency hopping between the subbands at a predetermined hopping time point, and determining whether to perform mirroring on a frequency axis within a subband in which the frequency hopping resource unit is located according to information scheduled from the base station at each hopping time point. And a data transfer controller and a mapper for mapping data to the resource unit determined according to a result of performing the mirroring selectively according to the determination and transmitting the data to the base station.

Further, according to an embodiment of the present invention, in a method for allocating resources to a terminal in a single carrier frequency division multiple access communication system, on a frequency axis divided into two or more subbands, a resource unit for a terminal is predetermined. Determining whether to perform frequency hopping between the subbands and whether to perform mirroring in the subbands for each cell at a hopping time point, and selectively performing frequency hopping and mirroring on a resource unit for the terminal according to the determination; Allocating the resource unit determined according to the execution result to the terminal.

In addition, according to an embodiment of the present invention, in a method for allocating resources from a base station in a single carrier frequency division multiple access communication system, on a frequency axis divided into two or more subbands, a resource unit for a terminal is predetermined. Determining whether to perform frequency hopping between the subbands and performing mirroring within the subbands at each hopping time point, and selectively performing frequency hopping and mirroring on a resource unit for the terminal according to the determination; And transmitting data to the base station using the resource unit determined according to the execution result.

In addition, according to an embodiment of the present invention, in a base station apparatus for allocating resources to a terminal in a single carrier frequency division multiple access communication system, on a frequency axis divided into two or more subbands, the resource unit for the terminal in advance At a predetermined hopping point of time, whether to perform frequency hopping between the subbands and whether to perform mirroring within the subbands is determined for each cell, and selectively performing the frequency hopping and mirroring according to the determination to allocate a resource unit to the terminal. A scheduler for determining, a mapper for classifying data received from the terminals by terminal using the resource unit determined by the scheduler, and a decoder for decoding the data classified for each terminal.

Further, according to an embodiment of the present invention, in a terminal apparatus for transmitting data to a base station in a single carrier frequency division multiple access communication system, on a frequency axis divided into two or more subbands, for a resource for the terminal in advance, A data transmission controller for determining whether to perform frequency hopping between the subbands and whether to perform mirroring in the subbands at a predetermined hopping time point, and a result of selectively performing the data hopping and mirroring of data according to the determination. And a mapper for mapping to the resource unit determined according to the transmission to the base station.

The effect obtained by the representative of the invention disclosed below will be briefly described as follows.

The present invention determines whether to apply mirroring at every hopping time point, and determines that the cell has a different pattern for each cell, thereby increasing the frequency diversity effect and randomizing interference between adjacent cells.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the embodiment of the present invention. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

In the present invention, in order to obtain frequency diversity while satisfying a single carrier characteristic in an uplink SC-FDMA system, random inter-cell interference when data is transmitted using different RUs at every predetermined time point by a general frequency hopping or mirroring method. It provides a way to increase anger.

First, for ease of explanation, the data channel is defined as follows.

FS band (Frequency scheduling band): A set of RUs allocated through frequency selective scheduling, which may consist of consecutive RUs or a set of non-contiguous distributed RUs.

FH band (frequency hopping band): A set of RUs that transmit to obtain frequency diversity rather than frequency selective scheduling, which may consist of contiguous RUs or a contiguous, distributed set of RUs. The FH band may consist of one or more sub-FH bands.

Mirroring: A method in which RUs located at both sides with respect to a center subcarrier or a center RU within a sub FH band are symmetrically moved.

Hopping time point: A time point for moving a location by hopping or performing mirroring. Depending on how hopping or mirroring is applied, it has the following period.

1.In case of supporting intra-subframe hopping & inter-subframe hopping: every slot

2. In case of supporting only inter subframe hopping: one sub-frame unit

<First Embodiment>

The first embodiment of the present invention proposes a method of determining a mirroring pattern to determine mirroring on / off according to different patterns for each cell. By using different patterns as much as possible between cells and reducing the probability of applying the same mirroring between cells at the same time, the effect of randomizing the interference between cells can be maximized.

FIG. 5 illustrates a method according to a first embodiment of the present invention. FIG. 5A illustrates a method of performing mirroring on a slot basis regardless of a hybrid automatic retransmission request (HARQ) operation. FIG. 5B illustrates a HARQ processor. It shows how to perform mirroring independently.

Referring to FIG. 5A, since it is assumed that Cell A 501 and Cell B 502 exist and support intra subframe hopping, the hopping period is in units of slots. In Cell A 501, on, on, on, off, on, off, off, off,... At each hopping point. Mirroring is applied during one slot in a pattern of &lt; RTI ID = 0.0 &gt;, &lt; / RTI &gt; Mirroring is applied during one slot in the pattern of.

Since Cell A 501 assigns RU 504 to UE A at time k, the UE performs mirroring at the next hopping time point (k + 1) and performs mirroring to perform RU during (k + 1) slots. 505 is used. Since mirroring is turned off at the (k + 3) time point, the data is transmitted using the same RU 506 as the Ru used in the previous slot (k + 2) during the (k + 3) slot. Similarly, mirroring is turned off at the next hopping point (k + 6), so data is transmitted using the same RU 507 as Ru used in the previous slot (k + 5) during the (k + 6) slot.

Similarly, since Cell B 502 assigns RU 508 to UE B during k slots, the UE is mirrored off at the next hopping time (k + 1), so that RU 509 during (k + 1) slots. Will be used. In addition, since the mirroring is turned on at the (k + 3) time point, the RU 510 is used during the (k + 3) slot. Similarly, at (k + 6) time, mirroring is turned on so that the RU 511 is used during the (k + 6) slot.

As described above, since mirroring is applied to each cell according to each hopping time, terminals located in different cells may use the same RU in a predetermined slot, but different mirroring patterns are applied again at the next hopping time, and thus, until the next slot. The probability of using the same RU falls. For example, in the case where Cell A 501 assigns RU 504 to one terminal for a certain slot period, and Cell B 502 assigns the same RU 508 to another terminal, Cell B 502 When the UE of the UE is located close to the Cell A 501, the UE of the Cell A 501 may receive a large amount of interference from the UE of the Cell B 502 at the k-th hopping point. However, since the UE of Cell A 501 performs mirroring at the next (k + 1) th hopping point, the UE of Cell A 501 transmits data using the RU 505 during the (k + 1) slot, and the UE of Cell B 502 mirrors. Since the data is transmitted using the same RU 509 as in the previous slot, the terminal of Cell A 501 and the terminal of Cell B 502 use different RUs.

In FIG. 5B, the mirroring pattern is differently applied to each cell in the same manner as in FIG. 5A. In FIG. 5B, when the mirroring is applied, the RU used in the immediately preceding slot is not the reference, but the RU belonging to the same HARQ process is the reference. do. That is, the UE located in Cell A 513 performs mirroring because mirroring is turned on at the k-th hopping time point. Instead of mirroring based on the RU information used in the previous slot (k-1), the UE transfers the same HARQ process. It is to use the mirrored RU 518 based on the RU 517 used in the slot (k-RTT + 1). The round trip time (RTT) means a time taken to send an initial transmission when a response received after transmitting data is NACK and a response to retransmission is an ACK. In other words, the data transmitted using the RUs 518 and 519 are retransmission data of the data transmitted using the RUs 516 and 517 or data of the same HARQ process. When mirroring is performed in consideration of HARQ RTT as described above, it is easy to define a mirroring pattern to use different RUs as much as possible during initial transmission and retransmission. However, the complexity of managing the mirroring pattern for each HARQ process may occur. Therefore, the mirroring pattern is determined according to the following method for the preferred implementation of the frequency hopping method according to the first embodiment of the present invention.

First, mirroring on / off is determined according to a value generated in a sequence at every hopping time point using a predetermined sequence. In the first embodiment of the present invention, since the sequence value is not needed to indicate the position of the RU to be hopped, but the sequence value is needed to indicate whether mirroring is performed, that is, whether it is on or off, Use sequences that generate values. In general, using a binary sequence, it is possible to generate one of two values, 0 or 1.

Second, in order to minimize RU collisions between neighboring cells, a plurality of sequences are generated and assigned to each cell in order to apply different mirroring patterns between at least neighboring cells. As a possible example, an orthogonal code set such as a Walsh code may be generated and allocated one by one for each cell, and the mirroring may be turned on or off according to the code value 0 or 1 at every mirroring time. Alternatively, mirroring may be turned on or off according to a value generated at each transmission point by using a sequence that generates a random value such as a pseudo noise sequence having a different seed value for each cell. You may decide to turn it off. Compared to the former method, the method using the PN sequence has a greater degree of randomization between arbitrary cells, thereby minimizing the same movement of the RUs. The following describes a first embodiment of the present invention by taking a method using a PN sequence as an example.

Cell-specific seed is required to generate a PN sequence value, and common timing information should be input to obtain the same PN sequence value between terminals in the same cell. As the timing information, a time difference from an absolute time to a current time may be used, or a common time frame counting value such as a system frame number (SFN) may be used.

6 illustrates an operation procedure of a terminal for determining mirroring according to the first embodiment of the present invention. The base station also performs the same procedure to receive data of the terminal.

Referring to FIG. 6, when a terminal receives a predetermined RU from a base station, the terminal first generates a PN sequence value in step 601. Next, in step 602, the generated PN sequence value is examined. If the generated PN sequence value is 0, the process proceeds to step 604 and determines that mirroring is not applied. If the generated PN sequence value is 1, it proceeds to step 603 and determines to apply mirroring. In step 605, mirroring is turned on / off as determined in step 603 or 604 to determine the location of the RU to be used for the next data transmission. In step 606, data is transmitted using the determined RU.

Mirroring moves the two RUs symmetrically from each other in the center of the entire FH band, so that the new RU to be used in the next slot can be found based on the information of the RU used to transmit data in the previous slot. The method is expressed by the following equation.

H (r) = NFH-r

In Equation 1, r denotes an RU which is a reference for mirroring. In FIG. 5A, RU is used in a previous slot, and in FIG. 5B, RU is used in a previous slot in the HARQ process for the same data. do. H (r) means a new RU to be used for one slot after being mirrored. NFH means the total number of RUs belonging to the FH band.

7 illustrates a terminal device according to a first embodiment of the present invention.

Referring to FIG. 7, the data symbol generator 703 generates a data symbol to be transmitted. In this case, the amount of data that can be transmitted for each transmission time interval (TTI) is determined by scheduling of the base station. The data symbols generated by the data symbol generator 703 are converted in parallel in the deserializer 704 and converted into signals in the frequency domain through the DFT device 705 for SC-FDMA transmission. In this case, the size of the FFT apparatus 705 is equal to the number of data symbols generated by the data symbol generator 703. The output signal of the DFT apparatus 705 is mapped to the frequency resource allocated to the corresponding terminal through the mapper 706. At this time, the information of the allocated frequency resource is determined by receiving RU information to transmit data from the data transmission controller 702. do. The data transmission controller 702 finds the RU information to be actually used for data transmission based on the scheduled RU information and mirroring. Since mirroring has a different pattern for each cell according to the PN sequence value, a PN sequence generator 701 for generating a PN sequence is required for this purpose. The method of determining the RU to use using the output value of the PN sequence generator 701 follows the method described above. The output signal of the mapper 706 is converted into a signal in the time domain in the IFFT device 707 and converted into a serial signal in the parallel-to-serial converter 708 and transmitted.

8 shows a base station apparatus according to the first embodiment of the present invention.

Referring to FIG. 8, the received signal is converted into a parallel signal in the deserializer 807 and converted into a signal in the frequency domain in the FFT apparatus 806. The output signal of the FFT apparatus 806 is inputted to the demapper 805 and separated for each terminal. When the demapper 805 performs the above operation, UE-specific RU allocation information determined by the uplink scheduler 802 is used. The uplink scheduler 802 generates RU information for each terminal by using the scheduled RU information and whether mirroring is applied according to the mirroring pattern. Since the cells have different mirroring patterns according to PN sequence values, a PN sequence generator 801 is required for this purpose. The method of determining the RU to use using the output value of the PN sequence generator 801 follows the method described above. The received signal divided for each terminal in the demapper 805 is input to the IDFT apparatus 804 for each terminal. The IDFT device 804 receives the received signal corresponding to UE1 (UE1) from the demapper 805 as an input, converts the received signal into a time domain, and converts the received signal corresponding to the terminal 1 (UE1) into a serial signal in the parallel-to-serial converter 808. The data symbol decoder 803 demodulates the data received from the terminal 1.

Second Embodiment

In the second embodiment of the present invention, the hopping application between the sub-FH bands and the mirroring application are combined, and one of the combinations is arbitrarily selected to determine the location of the RU to be used for data transmission. At this time, a combination is selected to have a different pattern for each cell. That is, in the second embodiment of the present invention, a channel structure for dividing the resources of the entire system frequency band into the FH band and the FS band, sufficiently obtaining a frequency hopping gain in the FH band, and sufficiently obtaining a frequency band that can be allocated in the FS band. Suggest.

9 shows a channel structure according to a second embodiment of the present invention.

Referring to FIG. 9, sub FH bands are defined at both ends of the entire frequency band as shown in 901 and 903, and the center frequency band between the sub FH bands is used as the FS band as shown in 902. In this case, the UEs using the FH band can hop to the sub FH bands at both ends, thereby sufficiently obtaining the frequency hopping gain. In addition, the maximum transmission rate can be increased because frequencies in the FS band are configured not to be dropped by the FH band to maximize continuous frequency resource allocation.

Next, in the channel structure proposed in the second embodiment of the present invention, a frequency diversity gain is sufficiently obtained, and hopping between sub-FH bands is performed to allow variable RU allocation in consideration of a single carrier characteristic, and mirroring is performed in the sub-FH band. The method will be described. In addition, in order to maximize the interference randomization gain between adjacent cells as in the first embodiment of the present invention, hopping on / off and mirroring on / off are applied between sub-FH bands according to different patterns for each hopping time point for each cell.

Whether hopping is applied between sub FH bands and whether mirroring is applied is possible in four combinations as shown in [Table 1]. At each hopping time point, one of these combinations is selected to apply hopping and mirroring in different patterns for each cell.

Combination FH band Mirroring One on on 2 off off 3 off on 4 on off

10A to 10D are diagrams for describing the second embodiment of the present invention.

In FIG. 10A and FIG. 10B, since it is assumed that intra TTI hopping is supported in Cell A 1001 and Cell B 1007, the hopping period is in a slot unit.

10A and 10B, in Cell A 1001, a combination of 3-> 1-> 4-> 3-> 2-> 1-> 2-> 3 sequence was selected in Table 1, Cell B (1007) was selected in Table 1 in the order of 3-> 4-> 2-> 1-> 3-> 2-> 1-> 4.

That is, Cell A 1001 uses RU 1002 at the k-th hopping point, but performs RU 1005 by performing both sub-FH band hopping and mirroring according to combination 1 at the (k + 1) -th hopping point. Will be chosen. At the next hopping point k + 2, the RU 1003 is selected because hopping between sub-FH bands is performed according to the combination 4 but no mirroring is applied. In addition, since the hopping and mirroring between sub-FH bands are not applied at the hopping time point (k + 4), the RU 1004 is selected.

Referring to the case of using different combinations between cells through Cell B 1007, Cell B 1007 selects the same RU 1008 as Cell A 1001 at the k-th hopping time point. However, at the next (k + 1) th hopping time point, Cell A 1001 hops between sub-FH bands according to Combination 1 and performs mirroring to select RU 1005, while Cell B 1007 selects Combination 4. Accordingly, since mirroring is not performed and only hopping between sub FH bands is performed, the UE of Cell B 1007 uses the RU 1009 during the (k + 1) slot. Of course, another terminal of Cell B 1007 may use the same RU as the RU 1005 during the (k + 1) slot, but is subject to interference from other terminals at every point in time rather than continuing to collide with the same terminal. Better interference randomization gain can be obtained.

In FIG. 10C and FIG. 10D, when applying the hopping and mirroring between the sub-FH bands as described above, the previous data is not previously determined within the HARQ process for the same data, instead of determining the next RU to be used based on the RU selected at the immediately previous hopping point. The RU used for transmission is determined based on the RU used for transmission.

That is, referring to FIG. 10C, when determining the location of the RU 1013, the sub-FH band hopping is not performed based on the RU used at the (k-1) th hopping time point, but the data is previously transmitted within the same HARQ process. Hopping between sub-FH bands is performed based on the RU 1014 used for transmission. Since the combination 4 is selected at the k-th hopping time point, the RU 1013 is selected when the inter-FH band hopping is turned on and the mirroring is turned off based on the RU 1014. In addition, since the combination 3 is selected at the (k + 1) th hopping time point, the RU 1012 is selected when the sub-FH band hopping is turned off and mirroring is turned on based on the RU 1013.

Next, as a pattern for selecting a combination of hopping application and mirroring application between sub-FH bands according to a second embodiment of the present invention, a method of selecting a combination according to a sequence value at every hopping time point using a predetermined sequence. Explain.

First, since the sequence value is not for indicating the position of the RU to be hopped, but for determining only four combinations of hopping on / off and mirroring on / off between sub-FH bands, a sequence having four values is used. In general, four combinations can be generated by using a quaternary sequence or by generating and combining two binary sequences. In this case, the sequence generation method may use a general sequence generation method, and thus a detailed description thereof will be omitted.

Second, in order to apply different patterns between at least neighboring cells in order to minimize RU collisions between neighboring cells, a plurality of sequences are generated and allocated to each cell. As a possible example, a combination may be selected by generating an orthogonal code set such as Walsh code and assigning one to each cell and generating a sequence value at each hopping time point. Alternatively, the combination may be determined according to a sequence value generated at each transmission point by using a sequence that generates a random value such as a pseudo noise sequence having a different seed value for each cell. In this method, since the randomness of PN sequence values between arbitrary cells is larger than that of the former method, it is possible to minimize the same movement of the same RU again from the previous hopping point. In the following, a method using a PN sequence is described as an example.

In order to generate the PN sequence value, absolute timing information for obtaining the same PN sequence value between the specific seed of each cell and terminals in the same cell is required. As the timing information, a time difference from an absolute time to a current time may be used, or a common time frame parameter used in a cell such as SFN may be used.

11 illustrates an operation procedure of a terminal according to the second embodiment of the present invention. The base station also performs the same procedure to receive data of the terminal.

Referring to FIG. 11, when a predetermined RU is scheduled from a base station, a PN sequence value is generated in step 1101, and the process proceeds to step 1102 to check whether the generated sequence value is one of 1,2,3,4. If 1, go to step 1103 to select the mirroring on and sub-FH band hopping on combination, and if 2, go to step 1104 to select the mirroring off and sub-FH band hopping off combination, and if 3, go to step 1105 to mirror. If a combination of off and sub-FH band hopping on is selected, the process proceeds to step 1106 in which the combination of mirroring on and sub-FH band hopping off is selected. In step 1107, the location of the RU to be transmitted is determined by performing mirroring or hopping according to the selected combination, and in step 1108, data is transmitted using the determined RU.

Since the transceiver device according to the second embodiment of the present invention has the same configuration as the transceiver device according to the first embodiment of the present invention, the drawings and description thereof will be omitted. However, in the second embodiment of the present invention, the PN sequence generator does not generate binary values of 0 or 1 like the PN sequence generators 701 and 802 according to the first embodiment of the present invention. And generate one to pass to data transmission controller 702 and uplink scheduler 802 to determine the location of the RU.

Third Embodiment

12 shows a channel structure according to a third embodiment of the present invention.

In the third embodiment of the present invention, when there are a plurality of sub-FH bands as shown in FIG. 12, in a system that always hopes between the sub-FH bands, the on / off of mirroring is determined according to different patterns for each cell. Suggest a method. In this case, if a different pattern is used as much as possible between cells, and the probability of applying mirroring at the same time in different cells is reduced, the effect of randomizing interference between adjacent cells can be maximized.

13 and 14 illustrate a method according to a third embodiment of the present invention. FIG. 13 illustrates a method of performing mirroring regardless of a hybrid automatic retransmission request (HARQ), and FIG. 14 shows HARQ processors. It shows how to perform mirroring.

Referring to FIG. 13, since it is assumed that both Cell A 1301 and Cell B 1311 support intra subframe hopping, the hopping period is in units of slots. In Cell A 1301, on, on, off, off, on, off, off, off,... Mirroring is applied in a pattern of, and in Cell B 1311, on, off, off, on, off, off, on, on... Mirroring is applied in the pattern of. In Cell A 1301, when the RU 1302 of the sub FH band # 1 is allocated to the UE at the k-th hopping point, the sub-FH is performed at the next hopping time point (k + 1) because hopping is always applied between the sub-FH bands. Since the terminal hops to band # 2 and mirroring is turned on according to the mirroring pattern, the UE uses the RU 1303 during the (k + 1) slot. At the next hopping point (k + 2), the UE hops back to sub FH band # 1 and mirroring is turned off, so that the UE uses the RU 1304 during the (k + 2) slot. At the next hopping point (k + 3), the UE hops back to sub-FH band # 2 and mirroring is turned off, so that the UE uses the RU 1305 during the (k + 3) slot.

Cell B 1311 defines a mirroring pattern differently from Cell A 1301. In other words, the case in which mirroring is turned on / off for each cell is determined differently. As a result, although the cell A 1301 and the cell B 1311 may select the same RU at a predetermined hopping point, the third embodiment of the present invention may reduce the possibility of selecting the same RU again at the next hopping point. have.

For example, a case in which Cell A 1301 assigns RU 1302 to UE A for a certain period and Cell B 1311 assigns the same RU 1312 to UE B, allocates RU 1312. When the terminal B of the received Cell B 1311 is located close to the Cell A 1301, the terminal A of the Cell A 1301 to which the RU 1302 is allocated is the terminal of the Cell B 1311 at the k-th hopping time point. There is a possibility of a large amount of interference from B. However, since Cell A 1301 performs both sub-FH band hopping and mirroring at the next (k + 1) -th hopping point, UE A of Cell A 1301 uses RU 1303 during the (k + 1) slot. Since the cell B 1311 does not apply mirroring after sub-FH band hopping, the terminal B of the cell B 1311 transmits the data using the RU 1313 during the (k + 1) slot. do. As such, the terminal A of the cell A 1301 and the terminal B of the cell B 1302 may use different RUs in the (k + 1) th slot to prevent interference from the same terminal.

In FIG. 14, mirroring is applied after hopping between sub-FH bands as in FIG. 13, and whether to apply mirroring is determined differently for each cell. However, in FIG. 14, when the mirroring is applied, the RU used at the previous transmission time point is not the reference, but the RU used for previous data transmission in the HARQ process for the same data becomes the reference.

That is, when the UE located in the Cell A 1401 performs mirroring at the (k + RTT) th hopping time point, the UE does not mirror based on the RU used in the (k + RTT-1) th slot immediately before the transmission time. The RU 1407 is selected by mirroring the RU 1406 used in the (k + 1) th slot. As described above, when mirroring is performed in consideration of HARQ RTT, a mirroring pattern that uses different RUs as much as possible for initial transmission and retransmission may be defined, and thus interference diversity effect may be maximized.

Since the operation procedure of the terminal for determining mirroring for implementing the method according to the third embodiment of the present invention is almost the same as the terminal procedure of the first embodiment of the present invention, the drawings and detailed description thereof will be omitted. However, in the third embodiment of the present invention, the sub-FH band hopping is always performed at the step of determining the RU.

Next, an example of a hopping pattern equation for implementing the method according to the third embodiment of the present invention will be described. The hopping pattern equation is shown in equation (2). By using the hopping pattern equation and the index of the scheduled resource block, the UE can know which resource block to use at every transmission time. In the following equation, a subband-based cyclic shift method was used as a method of implementing a subband hopping method.

In the above equation, Os is an offset value indicating how far the corresponding resource block scheduled to the UE is from the cyclic shift reference point, f_s is an index of the resource block allocated to the scheduling grant, and h (t) is the time point when the scheduled (t ) Represents the amount that the resource block is rotated. f _hop (i) is the index of the resource block after hopping is applied at the time of hopping (i), N_RB is the total number of resource blocks used for data transmission, N _o and N _s is scheduled to the terminal performing the hopping It indicates the maximum number of possible resource blocks.

When the total number of resource blocks N_RB is not a multiple of the number of subbands M, a specific subband may have a smaller number of resource blocks N _S than the number of resource blocks N _O that the remaining subbands have. Have. In Equation 2, since only one subband has a small amount of resource blocks, N _o and N _s can be obtained as shown in Equation 3 below.

Also, in Equation 2, h (i) is a parameter indicating the amount of cyclic shift, and has one of {0,1,2, .. M} and is selected by a bit value of a random sequence. h (0) = 0. m (i) is a parameter that determines mirroring on / off at the time of hopping i, and has one of {0,1} and is selected by the bit value of the random sequence or through the bit value of the random sequence. Alternatively, one of {0,1,2, .. 2 × M} may be selected as the x value to determine h (i) = x / 2 and m (i) = x Mod (2). If m (i) = 0, mirroring is off and if m (i) = 1, mirroring is applied.

The hopping pattern equation of Equation 2 will be described in more detail. First, the offset Os at the time when the scheduled resource block is scheduled is calculated according to the equation of the first line. From the offset (Os) value, it can be seen how far the resource block rotated from the rotation reference point.

The reason for introducing the offset value Os is as follows. The number N_RB of the entire resource blocks is not a multiple of the number M of subbands. In this case, the amount of resources of the subbands is not constant, so that hopping between subbands may not work properly. Thus, in the third embodiment of the present invention, one subband has a small amount of resource blocks (Ns), and the rest of the subbands configure the subbands to have the same amount of resource blocks (No), and the terminal has any subbands. In order to know whether the band has a small number of resource blocks, an offset value Os is introduced.

For example, if the total number of resource blocks (N_RB) is 22 and the number of subbands (M) is 4, the first subband has 4 resource blocks and the remaining subbands have 6 resource blocks. Can be. In the above structure, if the offset value Os is less than 4, the UE may know that the corresponding resource block belongs to a subband having a small number of resource blocks.

Next, according to the first conditional statement of Equation 2, cyclic shift is applied to resource blocks belonging to 0 to (N _S -1) based on the offset value (O _S ), and mirroring is performed within N _S resource blocks. do. However, mirroring is not applied when m (i) = 0.

If the offset value is larger than N _S , since the corresponding resource block belongs to a normal subband, mirroring is performed in N _O resource blocks after applying a cyclic shift according to the second conditional statement of Equation 2. However, if m (i) = 0, mirroring is not applied.

Of course, depending on the implementation, a plurality of subbands may configure a resource block of Ns, and the remaining plurality of subbands may be configured to have a resource block of N _O. For example, when the number of subbands is 4, two subbands may have five resource blocks, and two subbands may have six resource blocks. In this case, it can be easily implemented by changing the conditional statement that finds the corresponding subband using the offset value in Equation 2.

Fourth Example

When mirroring is turned on / off for each cell according to a random pattern, if mirroring is turned off or on continuously in successive slots, the probability of transmitting data using the same RU is increased even if the UE is located in another cell. However, when transmitting data in the HARQ process, it is preferable to obtain sufficient frequency diversity at each transmission point in terms of channel quality. Therefore, in at least continuous data transmission situations such as initial transmission and retransmission, it is necessary to allow terminals to select different RUs as much as possible. There is. To this end, in the fourth embodiment of the present invention, it is proposed to use a method of generating a random mirroring pattern and determining on / off of mirroring according to the random mirroring pattern in some cases. As a method of implementing the limited use, when both intra subframe hopping and inter subframe hopping are performed, mirroring is always turned on at the time of one of the two hoppings and according to a random mirroring pattern only in the other cases. Mirroring can be applied.

FIG. 15 illustrates a case in which mirroring on / off is determined according to a random mirroring pattern for inter subframe hopping and intra subframe hopping according to the fourth embodiment of the present invention.

In the fourth embodiment of the present invention, as in the channel structure according to the second embodiment of the present invention, the sub FH bands are positioned at both ends of the system frequency band, and the FS band is located in the central frequency band between the sub FH bands. As in the third embodiment of the present invention, in order to obtain a frequency diversity gain, hopping is performed between sub-FH bands at every hopping time.

Referring to FIG. 15, Cell A 1500 may turn on, off, off,... Only at an intra subframe hopping point. Mirroring is applied according to the pattern of &lt; RTI ID = 0.0 &gt;, &lt; / RTI &gt; Mirroring is applied according to the pattern of.

In the Cell A 1500, when the UE is allocated the RU 1502 at the (k-RTT) -th hopping point, the mirroring is turned on according to the mirroring pattern at the next hopping time (k-RTT + 1). Will be selected. The RU 1502 used in the first slot (k-RTT) of the previous HARQ transmission point in order to always perform mirroring at the k-th hopping point, which is the next HARQ transmission point, to use an RU of a location different from the previous HARQ transmission point. Mirroring is performed based on the selection of the RU 1504. Since mirroring is turned off according to the mirroring pattern at the next hopping time (k + 1), the RU 1505 is selected, and mirroring is always performed at the (k + RTT) th hopping time, the next HARQ transmission time, but the previous HARQ transmission time. The RU 1506 is selected by performing mirroring based on the RU 1504 used in the first slot k of FIG. At the next hopping point k + RTT + 1, mirroring is turned off according to the mirroring pattern, so the RU 1507 is selected.

Cell B 1520 similarly turns mirroring on / off according to a random mirroring pattern at the time of intra subframe hopping and moves to another sub-FH band. That is, when the RU 1508 is used in the (k-RTT) th slot, the RU 1509 is selected by turning off mirroring according to the mirroring pattern at the next hopping point (k-RTT + 1). In the next HARQ transmission, mirroring is always applied based on the RU 1508 used at the previous transmission time of the HARQ process for the same data. At this point, since mirroring is turned off according to the mirroring pattern, the RU 1511 is selected. In addition, at the next HARQ transmission, mirroring is always applied based on the RU 1510 used in the previous transmission in the HARQ process for the same data, so the RU 1512 is selected at the (k + RTT) th hopping point, At the RTT + 1) th hopping point, the RU 1513 is selected because mirroring is turned on according to the mirroring pattern.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a view for explaining the transmission characteristics of a single carrier in the prior art FIG.

2 is a diagram for explaining general frequency hopping

3 is a diagram for explaining general frequency hopping

4 is a diagram for explaining mirroring.

5A and 5B illustrate a method according to a first embodiment of the present invention.

6 is a procedure for determining an RU of a terminal or a base station for implementing the first embodiment of the present invention.

7 is an apparatus diagram of a terminal for implementing the first embodiment of the present invention.

8 is an apparatus diagram of a base station for implementing the first embodiment of the present invention.

9 is a channel structure diagram for implementing a second embodiment of the present invention.

10A to 10D are diagrams for explaining the method of the second embodiment of the present invention.

11 is a procedure for determining an RU of a terminal or a base station for implementing the second embodiment of the present invention.

12 is a channel structure diagram for implementing a third embodiment of the present invention.

13 is a diagram illustrating a method of performing mirroring regardless of HARQ according to a third embodiment of the present invention.

14 is a diagram illustrating a method of performing mirroring for each HARQ processor according to a third embodiment of the present invention.

15 is a diagram illustrating a method of performing mirroring for each HARQ processor according to a fourth embodiment of the present invention.

Claims (49)

A method for allocating resources to a terminal in a single carrier frequency division multiple access communication system, Performing frequency hopping between the subbands at a predetermined hopping time point for a resource unit for a terminal on a frequency axis divided into two or more subbands; Determining, at every hopping time point, whether to perform mirroring on a frequency axis for each cell in a subband in which the frequency hopping resource unit is located; And selectively performing mirroring on the frequency hopping resource unit according to the determination, and allocating the resource unit determined according to the mirroring result. The method of claim 1, Before the process of determining whether to perform the mirroring, Generating sequences indicating whether mirroring is performed during a plurality of hopping points, and allocating the generated sequences for each cell; The process of determining whether to perform the mirroring, And determining whether to perform mirroring according to bit values of sequences allocated for each cell. The method of claim 1, The resource unit for the terminal is a resource allocation method which is a resource allocated to the terminal at the time of the last frequency hopping. The method of claim 1, The resource unit for the terminal is a resource unit used for the last transmission of the data in a compound automatic retransmission request (HARQ) process for the same data. The method of claim 2, Wherein each of the sequences is an orthogonal code selected differently for each cell among orthogonal code sets or a pseudo noise sequence having a different seed value for each cell. The method of claim 1, If the number of resource units of the subbands is not the same, Determining, on a cell-by-cell basis, whether to perform mirroring on a frequency axis within a subband in which a resource unit for the UE is located at each hopping time point; Determining a position at which the resource unit for the terminal is to perform the frequency hopping according to the index of the resource unit for the terminal; And allocating the determined resource unit to the terminal by performing frequency hopping and mirroring according to the determined position and whether the determined mirroring is performed. The method of claim 1, The process of performing the mirroring, And always mirroring at predetermined hopping points in different subframes, and selectively mirroring at different hopping points in each subframe according to the determination. A method for allocating resources from a base station in a single carrier frequency division multiple access communication system, Performing frequency hopping between the subbands at a predetermined hopping time point for a resource unit for a terminal on a frequency axis divided into two or more subbands; Determining, at every hopping time point, whether to perform mirroring on a frequency axis within a subband in which the frequency hopping resource unit is located according to information scheduled from the base station; Selectively performing mirroring on the frequency hopping resource unit according to the determination, and transmitting data to the base station using the resource unit determined according to the mirroring result. The method of claim 8, The process of determining whether to perform the mirroring, And determining whether to perform the mirroring according to a bit value of a sequence indicating whether to perform the mirroring during a plurality of hopping time points allocated by the base station for each cell. The method of claim 8, The resource unit for the terminal is a resource allocation method used for the last data transmission. The method of claim 8, The resource unit for the terminal is a resource unit used for the last transmission of the data in a compound automatic retransmission request (HARQ) process for the same data. The method of claim 9, Wherein each of the sequences is an orthogonal code selected differently for each cell among orthogonal code sets or a pseudo noise sequence having a different seed value for each cell. The method of claim 8, The process of performing the mirroring, And always mirroring at predetermined hopping points in different subframes, and selectively mirroring at different hopping points in each subframe according to the determination. The method of claim 8, If the number of resource units of the subbands is not the same, Determining for each cell whether or not to perform mirroring on a frequency axis within a subband in which a resource unit for the terminal is located according to the information scheduled from the base station at each hopping time point; Determining a position at which the resource unit for the terminal is to perform the frequency hopping according to the index of the resource unit for the terminal; And transmitting data to the base station using the resource unit determined by performing frequency hopping and mirroring according to the determined position and whether the mirroring is performed. A base station apparatus for allocating resources to terminals in a single carrier frequency division multiple access communication system, On a frequency axis divided into two or more subbands, the frequency unit is performed between the subbands at a predetermined hopping time point for a resource unit for a terminal, and within the subband in which the frequency hopping resource unit is located at each hopping time point. A scheduler for determining whether to perform mirroring on a frequency axis for each cell and selectively performing mirroring on the frequency hopping resource unit to determine a resource unit to be allocated to the terminals according to the determination; A mapper for classifying data received from the terminals for each terminal based on the resource unit information determined by the scheduler; A base station apparatus comprising a decoder for decoding the data classified for each terminal. The method of claim 15, And a sequence generator for generating sequences indicating whether the mirroring is performed during a plurality of hopping points. And the scheduler determines whether to perform the mirroring according to bit values of sequences allocated for each cell. The method of claim 15, The scheduler is a base station apparatus for performing the mirroring on the resource unit allocated to the terminal at the time of the last frequency hopping or the resource unit used for the immediately preceding transmission of the data in a HARQ process for the same data. . The method of claim 16, And the sequence generator generates a pseudo noise sequence having a different seed value for each cell or an orthogonal code selected for each cell among orthogonal code sets. The method of claim 15, The scheduler, And base station always mirroring at predetermined hopping points in different subframes, and selectively performing mirroring at different hopping points in each subframe according to the determination. The method of claim 15, The scheduler, If the number of resource units of the subbands is not the same, For each hopping time point, whether to perform mirroring on a frequency axis in a subband in which a resource unit for the UE is located is determined for each cell, Determine a location where the resource unit for the terminal is to perform the frequency hopping according to the index of the resource unit for the terminal, The base station apparatus determines a resource unit to be allocated to the terminal by performing frequency hopping and mirroring according to the determined position and whether the mirroring is performed. A terminal apparatus for transmitting data to a base station in a single carrier frequency division multiple access communication system, On a frequency axis divided into two or more subbands, the frequency unit is performed between the subbands at a predetermined hopping time point for a resource unit for a terminal, and at the hopping time point, the frequency hopping according to information scheduled from the base station. A data transmission controller for determining whether to perform mirroring on a frequency axis within a subband in which an allocated resource unit is located; And a mapper for mapping data to a resource unit determined according to a result of performing the mirroring selectively according to the determination and transmitting the data to the base station. The method of claim 21, The data transmission controller determines whether to perform the mirroring according to a bit value of a sequence indicating whether to perform the mirroring during a plurality of hopping time points allocated by the base station for each cell. And a sequence generator for generating the sequence. The method of claim 21, And the data transmission controller performs the mirroring on the resource unit used for the immediately preceding data transmission or the resource unit used for the immediately preceding transmission of the data in a hybrid automatic retransmission request (HARQ) process for the same data. The method of claim 22, And the sequence generator generates a pseudo noise sequence having a different seed value for each cell or an orthogonal code selected for each cell among orthogonal code sets. The method of claim 21, The data transmission controller, The terminal apparatus always performs mirroring at a predetermined hopping point in different subframes, and selectively performs mirroring according to the determination at another hopping point in each subframe. The method of claim 21, The data transmission controller, If the number of resource units of the subbands is not the same, For each hopping time point, whether to perform mirroring on a frequency axis in a subband in which a resource unit for the terminal is located according to information scheduled from the base station is determined for each cell. Determine a location where the resource unit for the terminal is to perform the frequency hopping according to the index of the resource unit for the terminal, And terminal hopping and mirroring according to the determined position and whether the mirroring is performed. A method for allocating resources to a terminal in a single carrier frequency division multiple access communication system, Determining, on a frequency axis divided into two or more subbands, a resource hopping between the subbands for each cell at a predetermined hopping time point and whether to perform mirroring in the subbands for a resource unit for a terminal; Selectively performing frequency hopping and mirroring on the resource unit for the terminal according to the determination, and allocating the resource unit determined according to the result of the execution to the terminal. 28. The method of claim 27, Determining whether the frequency hopping and the mirroring is performed, For each cell, selecting one of predetermined combinations of on / off of the frequency hopping and mirroring on / off to determine whether to perform the frequency hopping and mirroring according to the selected combination. 28. The method of claim 27, The resource unit for the terminal is a resource unit allocated to the terminal at the time of the last frequency hopping. 28. The method of claim 27, The resource unit for the terminal is a resource unit used for the last transmission of the data in a compound automatic retransmission request (HARQ) process for the same data. 28. The method of claim 27, The process of determining whether to perform the mirroring, And selecting one of the combinations at each hopping point according to a sequence of bits in which each bit has one of four values. The method of claim 31, wherein And each of the sequences is an orthogonal code selected differently for each cell of an orthogonal code set. The method of claim 31, wherein And each of the sequences is a pseudo noise sequence having a different seed value for each cell. A method for allocating resources from a base station in a single carrier frequency division multiple access communication system, Determining, on a frequency axis divided into two or more subbands, whether a resource hopping for the terminal is performed between the subbands and whether mirroring is performed in the subbands at a predetermined hopping time point; Selectively performing frequency hopping and mirroring of the resource unit for the terminal according to the determination, and transmitting data to the base station using the resource unit determined according to the execution result. The method of claim 34, wherein Determining whether the frequency hopping and the mirroring is performed, For each cell, selecting one of predetermined combinations of on / off of the frequency hopping and mirroring on / off to determine whether to perform the frequency hopping and the mirroring according to the selected combination. The method of claim 34, wherein The resource unit for the terminal is a resource unit allocated to the terminal at the time of the last frequency hopping. The method of claim 34, wherein The resource unit for the terminal is a resource unit used for the last transmission of the data in a compound automatic retransmission request (HARQ) process for the same data. 36. The method of claim 35, The process of determining whether to perform the mirroring, And selecting one of the combinations at each hopping point according to a sequence of bits in which each bit has one of four values. The method of claim 38, And each of the sequences is an orthogonal code selected differently for each cell of an orthogonal code set. The method of claim 38, And each of the sequences is a pseudo noise sequence having a different seed value for each cell. A base station apparatus for allocating resources to a terminal in a single carrier frequency division multiple access communication system, On a frequency axis divided into two or more subbands, for a resource unit for a terminal, it is determined whether frequency hopping is performed between the subbands for each cell and whether mirroring is performed in the subbands at a predetermined hopping time point. A scheduler for selectively determining a resource unit to be allocated to the terminal by selectively performing the frequency hopping and mirroring according to: A mapper for classifying data received from the terminals by terminals using the resource unit determined by the scheduler; A base station apparatus comprising a decoder for decoding the data classified for each terminal. 42. The method of claim 41 wherein And a sequence generator for generating sequences indicating whether the frequency hopping and mirroring are performed during the hopping points. The scheduler determines whether to perform the frequency hopping and mirroring according to the selected combination by selecting one of predetermined combinations of on / off of the frequency hopping and mirroring on / off according to the bit value of the sequence. Base station device. 42. The method of claim 41 wherein The scheduler is a base station apparatus for performing the mirroring on the resource unit allocated to the terminal at the time of the last frequency hopping or the resource unit used for the immediately preceding transmission of the data in a HARQ process for the same data. . The method of claim 42, wherein And the sequence generator generates a pseudo noise sequence having a different seed value for each cell or an orthogonal code selected for each cell among orthogonal code sets. A terminal apparatus for transmitting data to a base station in a single carrier frequency division multiple access communication system, A data transmission controller for determining whether to perform frequency hopping between the subbands and whether to perform mirroring in the subbands for each resource at a predetermined hopping time, on a frequency axis divided into two or more subbands; And a mapper for mapping data to a resource unit determined according to a result of performing the frequency hopping and mirroring selectively according to the determination and transmitting the data to the base station. The method of claim 45, And a sequence generator for generating sequences indicating whether the frequency hopping and the mirroring are performed during the hopping points. The data transmission controller selects one of predetermined combinations of on / off of the frequency hopping and mirroring on / off according to a bit value of the sequence, and whether or not the frequency hopping and mirroring according to the selected combination. Terminal device for determining whether to perform. The method of claim 45, And the data transmission controller performs the mirroring on the resource unit used for the immediately preceding data transmission or the resource unit used for the immediately preceding transmission of the data in a hybrid automatic retransmission request (HARQ) process for the same data. The method of claim 46, And the sequence generator generates a pseudo noise sequence having a different seed value for each cell or an orthogonal code selected for each cell among orthogonal code sets. A method for allocating resources to a terminal in a single carrier frequency division multiple access communication system, Determining, at a predetermined hopping time point, whether to perform mirroring on a frequency axis of a resource unit for a terminal for each cell; Selectively performing mirroring according to the determination, and allocating a resource unit determined according to the execution result to the terminal.

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