TWI468052B - Method and user equipment for transmitting ranging signal, and method and base station for receiving ranging signal - Google Patents

Description

Method for transmitting ranging signal and user equipment, and method for receiving ranging signal and base station

This application claims US Provisional Application No. 61/373,281, filed on August 13, 2010, and U.S. Provisional Application No. 61/374,270, filed on August 17, 2010, and filed on March 31, 2010 The priority of the Korean Provisional Application No. 10-2011-0029916, the entire disclosure of which is hereby incorporated by reference.

The present invention relates to a mobile communication system, and more particularly to a method and apparatus for transmitting a ranging signal, and a method and apparatus for receiving the ranging signal.

The main standards established by the Institute of Electrical and Electronics Engineers (IEEE) 802.16 task group are classified as IEEE 802.16-2004 (also known as a fixed WiMAX), and an IEEE 802.16e-2005 (hereinafter referred to as "16e"). For action WiMAX. The IEEE standard 802.16e-2005 was finalized by the IEEE in December 2005. A current version of the mobile WiMAX technology basic standards include IEEE 802.16-2004, IEEE standard 802.16e-2005 (including errata for IEEE standard 802.16-2004), IEEE standard 802.16-2004/Corl-2005, IEEE standard 802.16f-2005 and IEEE standard 802.16 ^TM -2009 (Revision of IEEE 802.16-2004 standard, by the maintenance task group under the title of the draft open development "P802.16Rev2") and is based on IEEE standard 802.16g-2007 correction and consolidation.

The ranging procedure for IEEE 802.16e is used for many purposes. More specifically, the ranging procedure is classified into four ranging procedures, namely initial ranging, handover ranging, periodic ranging, and bandwidth request ranging. In the case of initial ranging, if a user equipment (UE) attempts to perform initial network entry, the initial ranging is used to acquire uplink time synchronization (ie, synchronization of time and frequency). In the case of handover ranging, if the connection is changed from a source base station (BS) to a target base station (BS), handover ranging is used to obtain initial synchronization from the target base station (BS). Periodic ranging enables a user equipment (UE) to periodically update uplink synchronization. The bandwidth request ranging enables a user equipment (UE) to request uplink resources from a base station (BS).

Today, the IEEE 802.16m (hereinafter referred to as "16m") standardization for the next version of Mobile WiMAX is densely implemented in a TGm (802.16 Task Group m) of the IEEE 802.16 task group. The IEEE 802.16m system uses many of the techniques not selected in previous versions of Mobile WiMAX (eg, Frequency Division Reuse (FFR) and the like). In conclusion, IEEE 802.16m needs to correct the ranging procedure and/or ranging channel of IEEE 802.16e according to the newly selected techniques described above.

Accordingly, the present invention is directed to a method and user equipment (UE) for transmitting a ranging signal, and a method and base station (BS) for receiving a ranging signal, the present invention substantially solving the prior art One or more of the limitations and disadvantages.

It is an object of the present invention to provide a method of efficiently constructing a ranging channel.

Another object of the present invention is to provide a method for establishing a ranging structure to minimize a cell inter-cell interference effect.

It is to be understood that the technical objects to be achieved by the present invention are not limited to the above-described technical objects and other technical objects that are not mentioned will be apparent to those skilled in the art from the following description.

The additional advantages, objects, and features of the invention are set forth in part in the description which follows. The objectives and other advantages of the invention will be realized and attained by <RTIgt;

To achieve these and other advantages and in accordance with the purpose of the present invention (as embodied and broadly described herein), a method for transmitting a ranging signal by a user equipment (UE) in a wireless communication system includes Using a preamble received from a base station (BS) to obtain cell service area ID information; receiving frequency partition configuration information from a base station (BS); using cell service area ID information and frequency partition configuration information, To allocate a ranging channel (RCH) for transmitting ranging signals to repeatedly use -1 partition or to a power-broosted reuse-3 partition (when no -1 partition is used again); And use the ranging channel (RCH) to transmit the ranging signal to the base station.

In another aspect of the present invention, a method for receiving a ranging signal by a base station (BS) in a wireless communication system includes transmitting a carrier cell service area ID information and transmitting an uplink frequency partition. Configure (UFPC) information to a user equipment (UE); and use the -1 partition again or when the reuse -1 partition does not exist, one of the power increases and then use the -3 partition based cell service area ID information and uplink The Link Frequency Partition Configuration (UFPC) information receives the ranging signal.

In another aspect of the present invention, a user equipment (UE) for transmitting a ranging signal in a wireless communication system includes a receiver; a transmitter; and a processor, the processor is grouped State to control the receiver and transmitter, wherein the receiver is configured to receive a preamble and frequency partition configuration information from a base station (BS), and the processor uses a preamble to obtain cell service area ID information, using Cell service area ID information and frequency partition configuration information to allocate a ranging channel (RCH) for transmitting ranging signals to repeatedly use -1 partition or to a power boost and then use -3 partition (when the reuse -1 when the partition does not exist); and use the ranging channel (RCH) to transmit the ranging signal to the base station.

In another aspect of the present invention, a base station (BS) for receiving a ranging signal in a wireless communication system includes a transmitter; a receiver; and a processor that controls the The transmitter transmits the uplink frequency partition configuration (UFPC) information to a user equipment (UE) in advance of transmitting the bearer cell service area ID information; and controls the receiver to use the re-use-1 partition or when used again When the -1 partition does not exist, one of the power increases and then uses the -3 partition based on the cell service area ID information and the uplink frequency partition configuration information to receive the ranging signal.

If the user equipment (UE) is not synchronized to the base station (BS), the ranging channel (RCH) is a non-synchronous ranging channel (NS-RCH), and the frequency resource of the asynchronous ranging channel (NS-RCH) Determined according to Equation 1:

[Equation 1]

I _SB = mod( IDcell , R _SB )

Where I _SB is used for the sub-band index (0, .., R _SB -1) from the asynchronous ranging channel (NS-RCH) in the R _SB sub-band, and Equation 2 determines R _SB :

[Equation 2]

Where L _{SB-CRU, FPi} is the number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition (FPi), and FPi corresponds to re-use-1 partition or only when there is no reuse-1 partition Use -3 after power is increased.

If the user equipment (UE) synchronizes with the base station (BS), the ranging channel (RCH) is a synchronous ranging channel (S-RCH), and the frequency resource used for the synchronous ranging channel (S-RCH) is based on Equation 3 determines:

[Equation 3]

I _SB,s =mod( IDcell +1, R _SB )

Where I _SB is used for the sub-band index (0, .., R _SB -1) from the synchronous ranging channel (S-RCH) in the R _SB sub-band, and R _{SB is} determined by Equation 4:

[Equation 4]

Where L _{SB-CRU, FPi} is the number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition (FPi), and FPi corresponds to re-use-1 partition or only when there is no reuse-1 partition Use -3 after power is increased.

It is to be understood that both the foregoing general description of the invention

The above technical solutions are only a part of the specific embodiments of the present invention, and various modifications applied to the technical features of the present invention can be based on the following detailed description of the present invention, which will be understood by those skilled in the art to which the present invention pertains.

As is apparent from the above, exemplary embodiments of the present invention have the following effects. Particular embodiments of the present invention reduce the risk of causing high interference in signals adjacent to the cell service area.

Particular embodiments of the present invention may prevent control channels from being over-allocated to specific frequency partitions.

Embodiments of the present invention can efficiently transmit uplink control information.

Other advantages of the present invention will be more clearly understood from the following detailed description of the appended claims.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It is to be understood that the detailed description of the embodiments of the invention are in the The following detailed description includes the details to provide a complete understanding of the invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without the details. For example, although the following description is based on a mobile communication system corresponding to an IEEE 802.16 system, the following description can be applied to other mobile communication systems other than the unique features of the IEEE 802.16 system.

In some cases, in order to prevent ambiguity in the concept of the present invention, the structures and devices of the known art will be omitted or will be illustrated in the form of a block diagram based on one of the main functions of the structures and devices. In addition, the same component symbols will be used throughout the drawings and the description to represent the same or the like.

Meanwhile, in the present invention, if a certain signal is assigned to a hyperframe/frame/subframe/symbol/carrier/subcarrier, it means that a certain signal is in the corresponding hyperframe/frame/time. One of the frame/symbol periods/times is transmitted through the corresponding carrier/subcarrier.

Figure 1 is a diagram illustrating the configuration of an exemplary wireless communication system.

Referring to FIG. 1, a wireless communication system 100 includes a plurality of base stations (BSs) 110a, 110b, and 110C and a plurality of user equipments (UEs) 120a to 120i. A base station (BS) generally refers to a fixed station, the base station (BS) communicates with a user equipment and/or another base station, and exchanges various types of data with the user equipment and another base station. And control information. A base station may refer to another term (eNB) such as an evolved NodeB (eNB), a base transceiver system (BTS), an access point (AP), and an advanced base station (ABS). Each BS 110a, 110b or 110c provides a service to a particular geographic area 102a, 102b or 102c of each BS 110a, 110b or 110c. A particular geographic area 102a, 102b, or 102c is typically referred to as a cellular service area. The cell service area can be further divided into a plurality of smaller regions 104a, 104b, and 104c for the purpose of improving system performance. These smaller areas may be referred to as sectors or segments. In the present invention, a cell service area, a sector or a segment refers to a BS or an antenna group providing a geographical area of a communication service in the present invention. Thus, communication with a particular cell service area, a particular sector, or a particular segment can be equal to communication with an antenna group that provides a communication service in a particular cell service area, a particular sector, or a particular segment. A downlink/uplink signal in a particular cell service area, sector or segment is a downlink from an antenna group that provides communication services in one of a particular cell service area, sector or segment. /Uplink signal. Furthermore, the channel state/quality of a particular cell service area, sector or segment is a channel or a channel established between an antenna group and a particular UE corresponding to a geographic area of the particular cell service area, sector or segment or Channel status/quality of the communication link. For reference, one of the cell service area identifiers used in the IEEE (Institute of Electrical and Electronics Engineers) 802.16m system is based on the entire system allocation. On the other hand, a sector or segment identifier is based on a specific area in which a service is provided from each base station (BS) and assigns any value from 0 to 2. All subcarriers can be classified based on sector or segment identifiers.

A User Equipment (UE) 120a through 120i refers to a mobile terminal of a mobile or fixed type. Examples of user equipment include various equipment that transmits user data and/or various types of control information to and from a base station. The terminal device may be referred to as a terminal equipment (TE), a mobile station (MS), an advanced mobile station (AMS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), A wireless device, a PDA, a wireless data modem, or a handheld device. In addition, in the present invention, a base station (BS) refers to a fixed station, and the base station (BS) communicates with a user equipment and/or another base station, and exchanges with user equipment and another base station. Various types of information and control information. A base station may refer to another term such as an evolved NodeB (eNB), a base transceiver system (BTS), and an access point (AP).

Each UE can communicate with at least one BS on a downlink and an uplink at a point in time. Communication can be divided into frequency division multiplexing access (FDMA), time division multiplexing access (TDMA), code division multiplexing access (CDMA), single carrier-FDMA (SC-FDMA), multi-carrier-FDMA (MC- FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or a combination of the above. Here, the downlink refers to a communication link directed from a BS to a UE and an uplink refers to a communication link directed from the UE to the BS.

Figure 2 is a block diagram of a UE and a BS for implementing the present invention.

The UE is used as a transmitting device on the uplink and as a receiving device on the downlink. Conversely, the BS can be used as one of the receiving devices on the uplink and as a transmitting device on the downlink.

The UE and the BS include antennas 500a and 500b for receiving information, data, signals and/or messages, and the transmitters 100a and 100b are for transmitting messages by controlling the antennas 500a and 500b, and the receivers 300a and 300b are for controlling the antennas. The 500a and 500b receive messages, and the memories 200a and 200b are used to store information of communications in the associated wireless communication system. The UE and the BS further include processors 400a and 400b, respectively, which are adapted to control the components of the UE and the BS (e.g., transmitters 100a and 100b, receivers 300a and 300b, and memories 200a and 200b). invention. Transmitter 100a, memory 200a, receiver 300a, and processor 400a in the UE can be configured to be separate components on separate wafers or the separate wafers can be combined into a single wafer. Similarly, transmitter 100b, memory 200b, receiver 300b, and processor 400b in the BS can be configured to be separate components on separate wafers or the separate wafers can be incorporated into a single wafer. The transmitter and receiver can be configured as a single transceiver or a radio frequency (RF) module in the UE or BS.

The antennas 500a and 500b transmit the generated signals from the transmitters 100a and 100b to the outside, or transfer the received radio signals to the receivers 300a and 300b. Antennas 500a and 500b may be referred to as antennas. Each antenna 埠 may correspond to a physical antenna or may be configured by a combination of more than one physical antenna element. In either case, the signals transmitted from each antenna are not designed to be further deconstructed by the UE receiver 300a. A transmitted reference signal corresponding to a given antenna 界定 defines an antenna 埠 from a point of the UE, and enables the UE to derive a frequency estimate for the antenna , whether or not the antenna 代表 represents a single from a physical antenna A radio channel, or a composite channel from a plurality of physical antenna elements that together comprise the antenna. That is, in accordance with an antenna port of an embodiment of the present invention, one of the channels for transmitting a symbol on the antenna frame can be derived from the channel through which the same antenna 传送 transmitting a different symbol on the same antenna frame. If the transmitters 100a and 100b and/or the receivers 300a and 300b use a plurality of antennas to support a multiple input multiple output (MIMO) function, each of the transmitters 100a and 100b and/or the receivers 300a and 300b can be connected to Two or more antennas.

Processors 400a and 400b generally provide overall control of the modules of the UE and the BS. In particular, the processors 400a and 400b may implement a control function for performing the present invention, a media access control (MAC) frame variable control function based on a service characteristic and a propagation environment, and a control mode for idle mode operation. Power save mode function, a handover function, and an authentication and encryption function. Processors 400a and 400b may also be referred to as controllers, microcontrollers, microprocessors, microcomputers, and the like. The processors 400a and 400b can be configured in hardware, firmware, software, or a combination of hardware, firmware, and software. In a hardware configuration, the processors 400a and 400b may be provided with one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), and programmable logic devices (PLDs). And/or field programmable gate arrays (FPGAs) for use in practicing the invention. In a firmware or software configuration, the firmware or software can be configured to include a module, a program, a function, etc., to perform the functions or operations of the present invention. The firmware or software may be provided in the processors 400a and 400b or may be stored in the memory 200a and 200b and driven by the processors 400a and 400b.

The transmitters 100a and 100b perform predetermined encoding and modulation on the signals and/or data. The predetermined encoding and modulation are scheduled by the scheduler connected to the processors 400a and 400b and transmitted to the outside, and then modulated. Signals and/or data are transferred to antennas 500a and 500b. For example, the transmitters 100a and 100b convert a transport stream into a K layer by demultiplexing, channel encoding, modulation, and the like. The K layers are transmitted through the antennas 500a and 500b after being processed in the transport processors of the transmitters 100a and 100b. The transmitters 100a and 100b and the receivers 300a and 300b of the UE and the BS can be configured differently according to a procedure for processing the transmitted signal and receiving the signal.

The memories 200a and 200b can store programs required for signal processing and control of the processors 400a and 400b and temporarily store input and output information. Each of the memories 200a and 200b can be implemented as a flash memory type storage medium, a hard disk type storage medium, a multimedia card micro type storage medium, a card type memory (eg, a secure digital position (SD) or eXtreme digital (XD) memory), a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a disk or a compact disc.

Figure 3 is a block diagram of an exemplary transmitter in each of the UE and the BS. The operation of the transmitters 100a and 100b will be described in more detail below with reference to FIG.

Referring to FIG. 3, each of the orthogonal frequency division multiplexing access (OFDMA) transmitters 100a and 100b includes a MIMO encoder 110, a MIMO precoder 120, subcarriers 140-1 to 140-K, and a OFDMA signal generator 150. Each of the transmitters 100a and 100b is connected to the N _t transmitting antennas 500-1 to 500-N.

The MIMO encoder 110 encodes a transport stream according to a predetermined coding scheme to form an encoded data and modulate the encoded data to be configured to represent a location on a cluster of signals in accordance with a predetermined modulation scheme. The transport stream stream input to the MIMO encoder 110 can be generated by subjecting a data block received from a MAC layer to various signal processing, such as channel coding, interleaving, and frequency agitation. The data stream can be referred to as a codeword or layer and equal to a data block from the MAC layer. The data block from the MAC layer is referred to as a transport block. The modulation scheme can be, but is not limited to, any of m phase shift keying (m-PSK) and m quadrature amplitude modulation (m-QAM). In order to modulate the encoded data, the MIMO encoder 110 can have an independent modulation module. At the same time, MIMO encoder 110 may define a MINO stream of input symbols such that MIMO precoder 120 may distribute antenna specific symbols to corresponding antenna paths. A MINO stream refers to an information path input to the MIMO precoder 120, and the information path before the MIMO precoder 120 can be referred to as a virtual antenna or a MINO stream. To define the MINO stream of symbols, MIMO encoder 110 may have a MINO stream mapper configured as a separate module.

The MIMO precoder 120 outputs antenna specific symbols to the subcarrier mappers 140-1 to 140-K by processing the received symbols according to a MIMO scheme according to the multi-transmitting antennas 500-1 to 500- _Nt . Mapping the MINO stream to antennas 500-1 through 500-N _t is performed by MIMO precoder 120. Specifically, MIMO precoder 120 multiplies the output x of MIMO encoder 110 by an N _t × M _t precoding matrix W. The output of MIMO precoder 120 can be represented as an N _t × N _F matrix z.

The subcarrier mappers 140-1 through 140-K assign the equal antenna specific symbols to the appropriate subcarriers and process the symbols multiplex according to the UE. Meanwhile, the secondary carrier mappers 140-1 to 140-K may include a logical resource unit (LRU) allocation block (not shown) for dividing the modulated symbols into LRU-sized segments and assigning the segments to the LRUs. . The subcarrier mappers 140-1 through 140-K may include a mapping block (not shown) for mapping the LRUs into data burst data. Data bursts are allocated to one physical resource unit (PRU) in an entity frequency domain. Therefore, the secondary carrier mappers 140-1 to 140-K are configured to map the modulated data into the secondary carrier according to a mapping relationship between the LRU and the PRU.

The OFDMA signal generator 150 outputs an OFDM symbol by modulating an antenna specific symbol according to an OFDM modulation scheme. For example, OFDMA signal generator 150 may perform inverse fast Fourier transform (IFFT) for antenna specific symbols and insert a cyclic prefix (CP) into the resulting IFFT time domain symbols. After the digital pair analog conversion and frequency up conversion, the OFDMA symbols are transmitted to the receiver through the transmit antennas 500-1 to 500N _t . The OFDMA signal generator 150 can include an IFFT module, a CP card, a digital-to-digital converter (DAC), and a frequency up-converter.

The OFDMA receivers 300a and 300b process the signals in the opposite operation to the OFDMA transmitter.

More specifically, the receivers 300a and 300b decode and demodulate the radio signals received from the outside through the antennas 500a and 500b and transfer the demodulation signals to the processors 400a and 400b. The antenna 500a or 500b connected to each of the receivers 300a and 300b may include an N _r receiving antenna. The signals received through the respective receiving antennas are downconverted to the baseband signal and restored to an original stream of data intended to be transmitted by the transmitter 100a or 100b after multiplex and channel demodulation. Therefore, each of the receivers 300a and 300b may have a multiplexer for down-converting the received signal to one of the baseband signals for multiplexing the baseband signal, and for The multiplexed processing signal stream demodulation is changed to one channel demodulation transformer of a data stream. The signal recovery, multiplexer, and channel demodulation transformers can be configured as separate modules or incorporated into a single module. More specifically, the signal recovery device may include an analog-to-digital converter (ADC) for converting a analog signal into a digital signal, and a CP remover 210 for removing a CP from the digital signal. An FFT module 220 for generating a frequency symbol by applying a fast Fourier transform (FFT) to the CP removal signal, and a secondary carrier demapper/equalizer 230 for restoring the frequency symbol to the antenna specific symbol . A multiplexer 250 recovers the MINO stream from the antenna specific symbols and a MIMO decoder 260 recovers the stream of data transmitted by the MINO stream by the transmitting device.

Compared to an OFDMA transmitter, a single carrier frequency division multiplexing access (SC-FDMA) transmitter is further included in the FFT module 130 before the secondary carrier mappers 140 to 140-K. In contrast to the OFDMA scheme, the SC-FDMA transmitter spreads a plurality of data in the frequency domain through the FFT prior to the implementation of the IFFT to significantly reduce the peak-to-average power ratio (PAPR). An SC-FDMA receiver includes an IFFT module 240 after the subcarrier removal mapper/equalizer 230 in addition to the components including the OFDMA receiver. The SC-FDMA receiver processes a signal in the opposite operation of the SC-FDMA transmitter.

Although each of the transmitters 110a and 100b is described in FIGS. 2 and 3, including the MIMO encoder 110, the MIMO precoder 120, the secondary carrier mappers 140-1 to 140-K, and the OFDMA/SC-FDMA signals. Generator 150, transmitter processors 400a and 400b may include MIMO encoder 110, MIMO precoder 120, secondary carrier mappers 140-1 through 140-K, and OFDMA/SC-FDMA signal generator 150. Similarly, although each of the receivers 300a and 300b includes a signal restorer, a multiplexer, and a channel demodulation in Figures 2 and 3, the receiver's processors 400a and 400b may include signal recovery. , multiplexer and channel demodulation transformers. Hereinafter, for convenience of description, the MIMO encoder 110, the MIMO precoder 120, the secondary carrier mappers 140-1 to 140-K, and the OFDMA/SC-FDMA signal generator 150 are included in a transmitter separate from the processors 400a and 400b. In 100a and 100b, transmitters 100a and 100b control the operations of MIMO encoder 110, MIMO precoder 120, secondary carrier mappers 140-1 through 140-K, and OFDMA/SC-FDMA signal generator 150. Moreover, the signal recovery unit, the multiplexer and the channel demodulation converter are included in the receivers 300a and 300b separated from the processors 400a and 400b, and the receivers 300a and 300b control the signal recovery unit, the multiplexer and the channel demodulation. Operation of the device. However, the specific embodiments of the present invention can equally be applied to the MIMO encoder 110, the MIMO precoder 120, the secondary carrier mappers 140-1 to 140-K, and the OFDMA/SC-FDMA signal generator 150 being included in The case of the processors 400a and 400b, and the case where the signal recovery, multiplexer, and channel demodulation transformers are included in the processors 400a and 400b.

Figure 4 illustrates an exemplary structure of a radio frame for IEEE 802.16m for a wireless communication system. The radio frame structure can be applied to one frequency division duplex (FDD) mode, half frequency division duplex (H-FDD) mode, and one time division duplex (TDD) mode.

Referring to Figure 4, the radio frame includes 20ms of superframes SU0 to SU3, and the superframes SU0 to SU3 support a bandwidth of 5MHz, 8.75MHz, 10MHz or 20MHz. Each hyperframe includes four frames F0 to F3 of the same size of 5 ms.

A frame can include a certain number of subframes. For a 5/10/20 MHz system bandwidth, a frame can include eight sub-frames SF0 through SF7. For an 8.75 MHz system bandwidth, a subframe can include seven subframes SF0 through SF6. For a 7 MHz system bandwidth, one subframe can include six subframes SF0 through SF5. The secondary frame is allocated for downlink or uplink transmission. Frames can be configured differently depending on the duplex mode. For example, because the downlink transmission and the uplink transmission are identified by the frequency in the FDD mode, the frame includes a downlink subframe or an uplink subframe. In the FDD mode, for a system bandwidth of 5/10/20 MHz, the eight subframes of each frame are numbered from 0 to 7. An idle time can exist at the end of each frame. On the other hand, because the downlink transmission and the uplink transmission are identified by time in the TDD mode, the subframes in the frame are classified into a downlink subframe and an uplink subframe. For a system bandwidth of 5/10/20 MHz, for example, n downlink subframes in eight subframes can be indexed from 0 to n-1 and the remaining (8-n) uplink subframes The box is indexed from 0 to (8-n)-1 in each frame.

A sub-frame is a unit of one transmission time interval (TTI). In other words, a TTI is defined by one or more subframes. In general, a basic TTI is set to a sub-frame. The TTI refers to a time interval during which a physical layer transmits an encoded packet through a radio interface. Therefore, a sub-frame or a plurality of adjacent sub-frames can be used as the transmission of the data packet.

A sub-frame includes a plurality of OFDMA symbols in the time domain and a plurality of subcarriers in the frequency domain. The OFDMA symbols may be referred to as OFDMA symbols or SC-FDMA symbols according to a multiplex access scheme. The number of OFDMA symbols in the subframe can vary according to a channel bandwidth and a CP length. The type of the subframe can be identified based on the number of OFDMA symbols included in the subframe. For example, subframe type-1 includes six OFDMA symbols, subframe type-2 includes seven OFDMA symbols, subframe type-3 includes five OFDMA symbols, and subframe type-4 includes nine OFDMA symbols. . A frame may include a type of subframe or a different type of subframe. For convenience of description, a specific embodiment of the present invention will be described in the context of a subframe type-1 including six OFDM symbols. However, it should be noted that the specific embodiments of the present invention, which will be described hereinafter, can also be applied to other types of subframes in the same mode.

In the frequency domain, an OFDMA symbol includes a plurality of subcarriers and the number of subcarriers is determined according to the size of the FFT. The secondary carriers may be classified into a data subcarrier for data transmission, a pilot frequency carrier for channel estimation, and a null carrier and a DC component used as one of the guard bands. The parameters of the OFDMA symbol include, for example, BW, N _used , n, G, and the like. BW is a nominal channel bandwidth, and N _used is the number of secondary carriers _used for signal transmission. In addition, n is a sampling factor, and n determines the primary carrier spacing and a useful symbol time with BW and N _used . G is the ratio of CP time to a useful symbol time.

A basic resource allocation unit in a logical frequency domain is referred to as a logical resource unit (LRU) and a basic resource allocation unit in an entity frequency domain is referred to as a physical resource unit (PRU). The PRU is mapped to the LRU by frequency permutation. Permutation refers to a process of mapping a predetermined entity resource to a logical resource.

The subframe includes a plurality of PRUs in the frequency domain. Each PRU includes a plurality of contiguous OFDMA symbols in the time domain and a plurality of contiguous subcarriers in the frequency domain. For example, the number of OFDMA symbols N _sym in the PRU may be equal to the number of OFDMA symbols included in the subframe. At the same time, the number of subcarriers within the PRU can be 18. In this case, the PRU of the Type-1 subframe includes 6 OFDM symbols × 18 subcarriers. The PRU may depend on a resource allocation type as a distributed resource unit (DRU) or a contiguous resource unit (CRU). A basic permutation unit of an uplink DRU is a micro-tile consisting of 6 subcarriers and symbols of N _sym . A basic permutation unit of a downlink DRU includes two carriers and one tone pair of symbols. If it is a sub-frame type -1, a PRU includes 108 tones. A tone can also be referred to as a resource element (RE). Adjacent logical resource units (CLRUs) are obtained through direct mapping of CRUs. Two types of CLRU, sub-band LRU, and mini-band LRU are supported according to two types of CRUs, sub-band based CRUs, and mini-band based CRUs, respectively.

A frequency band can be divided into sub-bands and/or mini-bands, each of which includes a predetermined number of resource units (RUs). The primary frequency band includes N ₁ (eg, 4) contiguous PRUs and a mini frequency band includes N ₂ (eg, 1) contiguous PRUs.

Each hyperframe contains a Hyper Frame Header (SFH). SFH carries basic system parameters and system configuration information. The SFH can be located in the first frame of the frame and use the last 5 OFDM symbols of the type-3 frame in the first frame. The SFH includes a control channel for broadcasting important system information to be recognized by a UE. SFH carries basic system parameters and system configuration information. The SFH can be classified into a primary SFH (P-SFH) and a primary SFH (S-SFH). Each hyperframe transmits P-SFH. It is possible that each superframe transmits S-SFH. The S-SFH can be divided into three sub-packets (S-SFH SP1, SUESFH SP2, and S-SFH SP3), so three sub-packets are transmitted. The secondary packet of S-SFH (hereinafter referred to as S-SFHSP) may be transmitted periodically. Individual sub-packets can have different transfer cycles.

A hyperframe carries up to four downlink synchronization signals. A downlink synchronization signal is used for downlink synchronization. In an IEEE 802.16m system, for example, the downlink synchronization signal includes a primary synchronization signal and a primary advanced preamble (PA-preamble) and a primary synchronization signal and an SA-preamble. Each of the PA-preamble, the SA-preamble, and the DL LBS location beacon is located in the first symbol of one of the FDD mode and the TDD mode. The PA-preamble conveys information about a system bandwidth and a carrier configuration. Therefore, a UE can obtain system bandwidth and carrier configuration information from the PA-preamble. The SA-preamble carries a cell service area identifier (ID) of a BS. The SA-preamble is located at the first symbol of the first and third frames in the hyperframe and can therefore be accumulated twice. A UE may use a SA-preamble transmitted twice in a hyperframe to detect the cell service area ID of the BS or perform a cell service area scan during handover. More specifically, the PA-preamble bit is at the first symbol of the second frame F1 in the hyperframe, and the SA-preamble bit is at the first symbol of the other three frames F0 and F2. If the hyperframe is used for position measurement of the DL LBS, the first symbol of the last frame F3 in the superframe contains the DL LBS position beacon, or the first symbol of the last frame F3 in the superframe contains a data. Signal.

On the other hand, one of the uplink synchronization ranging signals can be transmitted through an uplink (UL) ranging channel (RCH). The UL Ranging Channel (RCH) is used for UL synchronization. The UL RCH can be further classified into a non-synchronous ranging channel (NS-RCH) and a synchronous ranging channel (S-RCH) for the asynchronous and synchronous UEs, respectively. The S-RCH is used as a periodic ranging. The NS-RCH is used as the initial access and handover. Periodic ranging may indicate an operation and procedure for enabling a UE to periodically update UL synchronization. The initial access ranging may be an operation and procedure indicating uplink time/frequency synchronization acquisition when a UE initially accesses a wireless communication system. When a UE hands over from a current BS to a different BS, the handover ranging may indicate an operation and procedure for establishing initial synchronization with the different BSs described above.

The ranging system acquires the process of correct timing offset, frequency offset, and power adjustment, so the UE's transmission is aligned with the BS and received within the appropriate reception threshold. After DL synchronization, the UE attempts to perform initial ranging with the BS. If the ranging procedure is successfully completed, the UE is synchronized to the BS UL.

The above structure is merely exemplary. Therefore, various modifications can be made to the length of the hyperframe, the number of subframes included in the superframe, the number of OFDMA symbols included in the subframe, and the parameters of the OFDMA symbol. For example, the number of subframes included in a frame may vary depending on the channel bandwidth and the CP length.

Figure 5 exemplarily illustrates frequency partitioning for frequency division reuse (FFR). Specifically, Figure 5 illustrates a conceptual diagram of Frequency Division Reuse (FFR) based on the Reuse-3 scenario.

In a frequency domain, a PRU can be assigned to at least one frequency partition (FP). A frequency partition can be used for purposes such as FFR. Frequency division reuse (FFR) technology allows different frequency reuse factors to be applied across different frequency partitions. According to the IEEE 802.16m system, a system bandwidth can be divided into up to four FPs (FP0, FP1, FP2, and FP3). Referring to Figure 5, in the case of Re-use-3, a system bandwidth can be divided into four FPs (FP0, FP1, FP2, and FP3) in a logical frequency domain. In the four FPs (FP0, FP1, FP2, and FP3), FP0 can be referred to as a reuse-1 partition, and the remaining three FPs (FP1, FP2, and FP3) can be referred to as reuse-3 partitions. In this case, a particular partition may not allocate actual frequency resources and may not be constructed and used as needed. The FP can be displayed with different power levels as shown in Figure 5. From the reuse-3 partition, the re-use-3 partition with a higher power level than the other reuse-3 partitions can be referred to as a power boost reuse-3 partition. Referring to Fig. 5, in the FFR mode (FFR mode 1, FFR mode 2, and FFR mode 3), the power increase and the -3 partition can be FP1, FP2, and FP3, respectively. Different FFR patterns can be used in adjacent or adjacent cell service regions in different ways such that interference from other cell service regions is minimized within the respective cell service regions in terms of increased power and then used-3 partitions.

Each frequency partition (FP) may include one or more PRUs. Distributed resource allocation and/or contiguous resource allocation can be applied to each FP. A logical resource unit (LRU) can be a basic logical unit for distributed resource allocation and contiguous resource allocation. A logical distributed resource unit (LDRU) may include a plurality of secondary carriers (Sc) distributed within a frequency band. The LDRU can have the same size as the PRU. The LDRU can also be referred to as a distributed LRU (DLRU). A logically adjacent resource unit (LCRU) may include a neighboring secondary carrier (Sc). The LCRU has the same size as the PRU. The LCRU is also known as a CLRU.

The ULFFR including the number of FPs and the size of each FP can be broadcasted through the SFH system. For example, ULFP configuration information can be transmitted in the form of an Uplink Frequency Partition Configuration (UFPC) field based on an FFT size via S-SFH SP2. Table 1 shows an example of UFPC and frequency partitioning for the 2048 FFT. Table 2 exemplarily shows UFPC and frequency partitioning for a 1024 FFT. Table 3 exemplarily shows UFPC and frequency partitioning for 512 FFT.

In Tables 1 to 3, FP0 uses the -1 partition again and again, and FP1, FP2, or FP3 reuses the -3 partition. The frequency partition count (FPCT) may define the number of FPs, and FPSi (frequency partition size i) may define the number of PRUs allocated to the i-th FP. The N _PRU is a total number of PRUs supported by a corresponding system bandwidth. The N _PRU can vary based on an FFT size and a system bandwidth. FPi, FPCT and FPSi can be determined according to UFPC, as shown in Tables 1 to 3.

In Tables 1 to 3, in FP0:FP1:FP2:FP3, "0" indicates that the corresponding FP is not used. For example, as can be seen from Table 1, it is assumed that DFPC is set to 1, and "FP0:FP1:FP2:FP3=0:1:1:1" is reached, meaning that FP0 as a reuse-1 partition is not used.

Figure 6 exemplarily illustrates a downlink sub-frame structure for one of the IEEE 802.16m systems. Specifically, FIG. 6 exemplarily shows the data channel and the UL control channel allocated in a UL subframe.

Referring to FIG. 6, the DLRU in the UL frequency partition can be divided into a data, a bandwidth request, and a feedback area. A feedback area consists of feedback channels that can be used for both HARQ ACK/NACK (negative acknowledgement) and fast feedback. The bandwidth request area may consist of a bandwidth request channel available for a bandwidth request. A data area can be used for data transfer. A UL control channel other than a ranging channel (RCH) can be started with a first DLRU and can be allocated to a DLRU in a frequency partition (FP) in the following order: UL HARQ feedback channel (UL HFBCH) → UL fast return Grant Channel (UL FFBCH) → UL Bandwidth Request (UL BW REQ) Channel → and UL Data Channel.

The DLRU is used after frequency partitioning. Therefore, a first DLRU appears in each FP. In addition, assuming that the FFR is used for a UL subframe, the UL Control Channel can be assigned to the Re-Use-1 partition or the Power Up Reuse-3 partition. Therefore, information about a frequency partition (FP) including one of the UL control channels is required. A base station (BS) can notify a UE of a FP, wherein the UL control channel will be located through the SFH. For example, information about the FP in which the UL control channel will be located may be indicated by S-SFH SP1, as shown in Table 4 below.

Referring to Table 4, the base station (BS) can broadcast S-SFH SP1, in which the "frequency partition location for UL control channel" field is set to 0b0 or 0b1. When the above-mentioned field included in the S-SFH SP1 is set to 0b0, one UE that has received the S-SFH SP1 assigns a UL control channel to the reuse-1 partition, and transmits the UL control channel to the BS. If the above field included in the S-SFH SP1 is set to 0b1, the UE allocates the UL control channel to the power increase and then uses the -1 partition and transmits the UL control channel to the BS.

Figure 7 illustrates an example in which a plurality of frequency partitions are used in adjacent cell service areas.

Multi-frequency partitioning is designed for a specific purpose. In general, the power boost and then -3 partitions are designed to transmit an uplink signal at a higher transmit (Tx) power than a non-power boost and then use the -3 partition. In the same way as a UE located at the edge of a cell service area, a BS is designed to enable a UE that experiences a high propagation loss or poor channel state to use the power to increase the -3 partition for higher transmission (Tx The power transmits an uplink signal. In order to minimize interference from the adjacent cell service area of the -3 partition due to increased power, the adjacent cell service area may use a different frequency partition than the power increase reuse-3 partition, as shown in FIG.

Figures 8 and 9 illustrate a ranging channel structure that may be used in one embodiment of the present invention in a time domain. Specifically, FIG. 8 exemplarily illustrates one of the non-synchronized UEs' Ranging Channels (RCH), and FIG. 8 exemplarily illustrates one of the UEs' Ranging Channels (RCH).

Referring to Figure 8, the NS-RCH is used as the initial network entry and association and is measured relative to a target BS during handover. An entity NS-RCH consists of a ranging front (RP) having a length of T _RP according to the ranging subcarrier spacing Δf _RP and a ranging cyclic prefix (RCP) having a length of T _RCP in the time domain. RCP is a replication of the latter part of the RP without phase discontinuity between the RCP and the RP. An NS-RCH occupies a local bandwidth corresponding to one sub-band. The NS-RCH may consist of format 0 or format 1. Referring to Figure 8(a), the NS-RCH of format 0 is constructed in a UL subframe. Referring to Figure 8(b), the NS-RCH of Format 1 is constructed in three UL subframes. The transmission start time of the NS-RCH is aligned with the corresponding UL AAI subframe start time at the DL synchronization UE.

Referring to Figure 9, the S-RCH is used as a periodic ranging. A UE that has been synchronized for T-ABS is allowed to transmit a periodic ranging signal. The physical structure of the S-RCH occupies 72 subcarriers by 6 OFDMA symbols, and the OFDMA symbol starts from the first OFDMA symbol in the primary frame, where there are two repeated signal waveforms and as a basic unit, each signal waveform is transmitted through Divided by the previous generation of 72 subcarriers of 3 OFDMA symbols. In Fig. 9, _{Tb is} defined as a useful symbol time, and _{Tg is} defined as a CP time. T _{b is} defined as 1/ΔF, and T _{g is} defined as G‧T _b . In this case, the G system CP time (T _g ) versus the useful symbol time (T _b ). For example, G can be set to any of 1/4, 1/8, 1/16, and the like.

The UE can identify a time position of the NS-RCH or S-RCH by means of broadcast signal transmission from the BS. Each of the frames/superframe periods may be assigned an NS-RCH or S-RCH, and may be assigned to a subframe position offset by a particular subframe offset during each allocation period.

On the other hand, one of the frequency positions of the NS-RCH or S-RCH can be determined specific to the cell service area without additional signal transmission. The primary frequency band allocated to the NS-RCH and the primary frequency band allocated to the S-RCH may be determined by a cell service area ID (IDcell) and the number of allocated secondary frequency bands (Y _SB ), as shown in Equations 1 and 2.

[Equation 1]

I _SB = mod( IDcell , Y _SB )

In Equation 1, I _SB is a sub-band index (0, .., Y _SB -1) assigned from the Y _SB sub-band to the NS-RCH.

[Equation 2]

I _{SB , s} = mod ( IDcell +1, Y _SB )

In Equation 2, I _SB is a primary band index (0, .., Y _SB -1) assigned from the Y _SB sub-band to the S-RCH.

The total number of subbands (Y _SB ) of ranging on all frequency partitions can be calculated by Equation 3 below.

[Equation 3]

In Equation 3, L _{SB-CRU, FPi} is the number of sub-band CRUs assigned to a frequency partition (FPi). N ₁ is the number of PRUs that make up a sub-band. For example, N ₁ can be set to 4.

As can be seen from Figure 6, a frequency location that can be allocated by the UL control channel other than the RCH can be limited to reuse -1 partition or power boost and then use -3 partition. Conversely, according to Equations 1 and 2, the frequency positions of the NS-RCH and S-RCH can be allocated in all partitions.

RCH is a contention based channel, so it is generally difficult to properly control the Tx power of the RCH. Furthermore, when an attempt is made to perform RCH transmission, the rise in the Tx power of the RCH is performed so that the RCH can be transmitted with high power. If the RCH having the above characteristics is allocated to the power increase and then the -3 partition is used, the RCH can generate high interference in the power increase in the adjacent cell service area and then in the -3 partition. Therefore, the RCH frequency position must be determined in consideration of a frequency partition (FP) in the same manner as in other UL control channels.

To overcome the problems encountered when assigning RCHs by Equation 1 or 2, a method for allocating RCHs to one of the frequency partitions (FPs) allocated by other UL control channels can be considered. However, in the case where the RCH is assigned to the same FP as the FP of the other UL control channel, an overload will occur in the above FP. If several FPs are used by the FFR, the UL control channel such as the high speed feedback channel or the BW REQ channel can be assigned only to one of the specific FPs indicated by the SFH. Therefore, the capacity of each FP is limited, so that there are limitations when assigning a large number of UL control channels to a specific FP. In other words, the number of UEs, each of which can assign a UL control channel to a particular FP, can be limited. The above limitations become severe when the RCH is assigned to the FP allocated by the UL control channel. Since one RCH occupies one sub-band, the transmission of NS-RCH and S-RCH requires two sub-bands. Therefore, if other UL control channels and RCHs are allocated to a particular FP indicated by the SFH, the frequency resources that can be used by other UL control channels in a particular FP can be reduced to as much as for RCH. Although there are a large number of resources of a specific FP in which the RCH and other UL control channels can simultaneously use resources, the number of resources remaining after the allocation of the RCH and the UL control channel is reduced, and the resources of the data communication can also be reduced. In this case, although the cell service area edge UE having one of the bad channel states transmits the control information to the BS efficiently by using the -1 partition or the power increase and then using the -3 partition, the corresponding FP has an insufficient number of resources. In data communication, the amount of substantial communication processing is reduced.

Therefore, in order to simultaneously overcome the above problem while efficiently transmitting the RCH, the following specific embodiment for selecting a frequency resource for RCH transmission is proposed as follows.

<First embodiment: Using duplicated frequency partitions (FPs)>

The first embodiment assigns the RCH to the Reuse-1 partition and the Power Up Reuse-3 partition instead of assigning the RCH only to one of the frequency partitions (FP) allocated by the other UL Control Channel.

Figure 10 exemplarily illustrates a ranging channel (RCH) allocation in accordance with a first embodiment of the present invention. In particular, Figure 10(a) illustrates an example in which a frequency control partition (FP) position for a UL control channel, rather than a RCH, indicates a power boost reuse-3 partition. Figure 10(b) illustrates an example in which one of the other UL control channels is used instead of one of the RCH frequency partition (FP) locations indicating reuse of the -1 partition. The above FP for other UL control channels can be indicated by the BS through the SFH, as described above.

Regardless of whether the FP system for other UL control channels reuses the -1 partition or the power boost and then uses the -3 partition, the UE located in a predetermined cell service area assigns the corresponding RCH to the reuse for the predetermined cell service area -1 The partition or power is increased and the -3 partition is used. Referring to Equations 1 and 2, the frequency resources for the RCH are determined using a total number (Y _SB ) assigned to the sub-bands of all FPs. That is, according to Equations 1 and 2, the frequency resource of the RCH can be selected from the cell service area selected from the Y _SB sub-band. However, the first embodiment of the present invention selects the RCH frequency resource from the reuse-1 partition and the power boost reuse-3 partition.

For example, according to the following equation, the RCH frequency resource can be determined for a cell-specific service area without additional signal transmission. The sub-band allocated to the NS-RCH and the sub-band allocated to the S-RCH may be a cell service area ID (IDcell) and the number of sub-bands allocated to the re-use-1 partition and the power increase reuse-3 partition (R _SB The decision is shown in Equations 4 and 5.

[Equation 4]

I _SB = mod( IDcell , R _SB )

In Equation 4, I _SB is a sub-band index (0, .., R _SB -1) assigned from the R _SB sub-band to the NS-RCH.

[Equation 5]

I _{SB , s} = mod ( IDcell +1, R _SB )

In Equation 5, I _SB,s is the sub-band index (0, .., R _SB -1) assigned from the R _SB sub-band to the S-RCH.

The number of sub-bands (R _SB ) assigned to the reuse-1 partition and the power boost reuse-3 partition can be calculated by Equation 6 below.

[Equation 6]

In Equation 6, L _{SB-CRU, FPi} is the number of sub-band CRUs assigned to a frequency partition (FPi).

The UE according to the first embodiment of the present invention may assign the NS-RCH to any of the reuse-1 partition and the power boost reuse-3 partition according to Equation 4. The UE allocates other UL control channels (such as a feedback channel or BW REQ channel) to a frequency partition (FP) indicated by the S-SFH SP1 from the Reuse-1 partition or the Power Up Reuse-3 partition. Thus, in accordance with the first embodiment of the present invention, other UL control channels and RCHs can be assigned to the same FP or different FPs. However, no control channels are assigned to a non-power boost FP.

<Second embodiment: using FP different from other UL control channels>

A second embodiment of the present invention assigns an RCH to an FP that is different from one of the FPs assigned by other UL control channels. For example, assuming that a UL control channel such as a feedback channel and a BW REQ channel is assigned to any of the partitions of the reuse-1 partition and the power boost reuse-3 partition indicated by S-SFH SP1, the RCH can be used. Assign to a different partition that is not assigned by other UL channels (from the Reuse-1 partition and the power boost to the -3 partition).

For example, assuming that, for example, a feedback channel and other UL control channels of a BW REQ channel are assigned to any of the reuse-1 partition and the power boost reuse-3 partition indicated by S-SFH SP1, the RCH is allocated. To a different partition that is not allocated by the other UL channels (from the reuse -1 partition and the power increase and then use the -3 partition).

Figure 11 exemplarily illustrates an RCH allocation in accordance with a second embodiment of the present invention. Figure 11(a) illustrates an example in which a frequency control partition (FP) position for the UL control channel is used instead of the RCH to indicate that the power is increased and the -3 partition is used. Figure 11(b) illustrates an example in which one of the other UL control channels is used instead of one of the RCH frequency partition (FP) locations indicating the reuse of the -1 partition. The above FP for other UL control channels can be indicated by the BS through the SFH, as described above.

Referring to Fig. 11(a), assuming that one FP system power boost for other UL control channels reuses the -3 partition, a UE located in a predetermined cell service area assigns the corresponding RCH to the reuse-1 partition. Referring to FIG. 11(b), assuming that the FP system for other UL control channels reuses the -1 partition, the UE increases the power allocated to the predetermined cell service area by the corresponding RCH and uses the -3 partition. In other words, a UE in which the "frequency partition (FP) location field for the UL control channel" field is set to the S-SFH SP1 of 0b0 has been received, and the other UL control channels are assigned to the reuse-1 partition, The RCH is allocated to the power increase and then the -3 partition is used, and the result of the assignment is transmitted. On the other hand, a UE in which the "frequency partition (FP) location field for the UL control channel" field is set to the S-SFH SP1 of 0b1 has been received, and the other UL control channels are allocated to the power increase and then used. -3 partition, and assign RCH to reuse -1 partition, and transfer the result of the allocation.

However, depending on the UL frequency partition configuration shown in Tables 1 through 3, it may not be possible to configure any partitions that use -1 partitions and power boosts to reuse -3 partitions. In this case, the UE may assign the RCH to the same frequency partition (FP), such as a frequency partition (FP) indicated for the UL control channel.

For example, according to the following equation, the RCH frequency resource can be determined for cell-specific service area without additional signal transmission. The sub-band allocated to the NS-RCH and the sub-band allocated to the S-RCH may be by a cell service area ID (IDcell) and the number of sub-bands allocated to the reuse--1 partition or the power-up-reuse-3 partition ( R _SB ) is determined as shown in Equations 7 and 8.

[Equation 7]

I _SB = mod( IDcell , R _SB )

In Equation 7, I _SB is a sub-band index (0, .., R _SB -1) assigned from the R _SB sub-band to the NS-RCH.

[Equation 8]

I _{SB , s} = mod ( IDcell +1, R _SB )

In Equation 8, I _SB,s is a primary band index (0, .., R _SB -1) assigned from the R _SB sub-band to the S-RCH.

The number of sub-bands (R _SB ) assigned to the reuse--1 partition or the power-up-reuse-3 partition can be calculated by Equation 9 below.

[Equation 9]

In Equation 9, L _{SB-CRU, FPi} is the number of sub-band CRUs assigned to a frequency partition (FPi). In Equation 9, FPi may indicate a partition from the Reuse-1 partition and the Power Increase Reuse-3 partition instead of being indicated by the BS for other UL control channels. For example, a frequency partition (FP) for other control channels can be transmitted from the BS signal to the UE through the frequency partition field for the UL control channel in the S-SFH SP1.

A UE according to a second embodiment of the present invention may allocate NS-RCH to any of the sub-bands of a partition from the Re-use-1 partition and the Power Increase Reuse-3 partition according to Equation 7 (not The indication is for the UL Control Channel). The UE according to the second embodiment of the present invention may allocate the S-RCH to any one of the sub-bands of a partition from the reuse-1 partition or the power increase reuse-3 partition according to Equation 8 (not indicated) In the UL control channel). The UE may allocate other UL control channels (such as a feedback channel or BW REQ channel) to a frequency indicated for the UL control channel. Thus, in accordance with the second embodiment of the present invention, the other UL control channels and RCHs described above are not assigned to the same frequency partition (FP) unless the -1 partition and/or the reuse-2 partition are not present.

<Third embodiment: Using frequency partitioning (FP) according to a predefined priority>

A third embodiment of the present invention allocates RCH to a partition having a large number of frequency resources regardless of a frequency partition (FP) allocated by other UL control channels. A third embodiment of the present invention can prevent a shortage of resources when control resources are concentrated and assigned to a particular FP. As can be seen from Tables 1, 2 and 3, in many cases, FP0 from FP0, FP1, FP2, and FP3 uses the largest amount of resources, and FP0 can be substantially a reuse-1 partition. Therefore, according to the third embodiment of the present invention, the RCH can be mainly allocated to the FP0 having the largest amount of resources.

As can be seen from Tables 1, 2 and 3, a special case where one of the FP0 or the repeated use-1 partition does not exist may occur. Regarding the above, it is possible to reserve which frequency partitions (FPs) are assigned RCH. For example, assuming FP0 does not exist, it may be scheduled to allocate the RCH to a power boost and then use the -3 partition. In another example, assuming that there is no FP0 or reuse -1 partition, then the RCH can be scheduled to be allocated to a partition with the smallest index (or highest index).

Fig. 12 exemplarily illustrates a ranging channel (RCH) allocation in accordance with a third embodiment of the present invention. Specifically, the example of Figure 12(a) illustrates the RCH allocation in the case of reusing -1 partition configured and reusing -1 partitioning for a frequency partition (FP) of the UL control channel, An example of the 12(b) diagram shows the RCH allocation in the case of re-use-1 partition configuration and power boosting and then using -3 partitioning for a frequency partition (FP) for the UL control channel, and 12th (c) Diagrammatic illustration of RCH allocation in the case of re-use-1 partition without configuration

Referring to FIG. 12(a), a UE may allocate an RCH to a re-use-1 partition, and may allocate a general UL control channel (eg, a feedback channel and a BW REQ channel) to the BS for reuse. The partition and power are raised again using a specific reuse-1 partition indicated by the middle of the -3 partition. In this case, not only the other control channels of the UE but also the RCH can be allocated to the reuse-1 partition and then transmitted to the BS.

Referring to FIG. 12(b), the UE may allocate the RCH to the reuse-1 partition, and may assign other UL control channels to the power boost reuse-3 partition indicated by the BS for the UL control channel. In this case, the RCH of the UE can be allocated to a frequency partition different from the frequency partition of the other control channels and then transmitted to the BS.

Referring to Figure 12(c), if the -1 partition is not used again, the UE may allocate (e.g., increase) the RCH to the -3 partition according to a predetermined rule.

The UE may decide whether to use the -1 partition (or FP0) again based on the uplink frequency partition configuration (UFPC) information transmitted from the BS.

For example, according to the following equation, the RCH frequency resource can be determined for cell-specific service area without additional signal transmission. The sub-band allocated to the NS-RCH and the sub-band allocated to the S-RCH may be by a cell service area ID (IDcell) and the number of sub-bands allocated to the reuse--1 partition or the power-up-reuse-3 partition ( R _SB ) is determined as shown in Equations 10 and 11.

[Equation 10]

I _SB = mod ( IDcell , R _SB )

In Equation 10, I _SB is a sub-band index (0, .., R _SB -1) assigned from the R _SB sub-band to the NS-RCH.

[Equation 11]

I _{SB , s} = mod ( IDcell +1, R _SB )

In Equation 11, I _SB,s is the sub-band index (0, .., R _SB -1) assigned from the R _SB sub-band to the S-RCH.

The number of sub-bands (R _SB ) assigned to the reuse-1 partition or the power boost reuse-3 partition can be calculated by Equation 12 below.

[Equation 12]

In Equation 12, L _{SB-CRU, FPi} is the number of sub-band CRUs allocated to a frequency partition (FPi). In this case, FPi may indicate that the -1 partition is reused. However, when the -1 partition is not used again, the FPi can correspond to a power boost and then use the -3 partition.

A UE according to a third embodiment of the present invention may assign NS-RCH to any of the sub-bands of the reuse-1 partition according to Equation 10. However, if the -1 partition is not used again, the NS-RCH is allocated to any of the sub-bands where the power is increased and then the -3 partition is used. The UE according to the third embodiment of the present invention may assign the S-RCH to any one of the sub-bands of the reuse-1 partition according to Equation 11. However, if the -1 partition is not used again, the S-RCH is allocated to any of the sub-bands where the power is increased and then the -3 partition is used. Each UE may allocate other UL control channels (such as a feedback channel and a BW REQ channel) to a partition indicated for the UL control channel.

For reference, as can be seen from Equations 1 through 12, L _{SB-CRU, FPi} may indicate the number of sub-band CRUs allocated to FPi. The total number of CRUs allocated to FPi (where i ≧ 0) in units of primary bands can be given by UCAS _i indicating the size of the uplink CRU allocation.

In FP0, the number of CRUs based on the subband can be determined by UCAS _SB,0 . The UE can identify the UCAS _{SB,0 of the} FP0 through the SFH. For example, the BS can perform signal transmission on the SFH for the UCAS _{SB, 0} of FP0. The number of sub-band based CRUs in the _FP0 (L _{SB - CRU, FP0} ) can be calculated by Equation 13 below.

[Equation 13]

Regarding FPi (i > 0, FPCT ≠ 2), in order to perform the same number of signal transmissions of the assigned CRUs, only UCAS _i having a value can be signaled for all i values (where i > 0). If UFPC is set to zero (UFPC=0), UCAS _i (i>0) can be zeroed. The UE can receive UCAS _i for FPi (i>0, FPCT≠2) through SFH. In this case, the number of sub-band CRUs (L _{SB - CRU, FPi} ) appearing at FPi (i > 0) can be calculated by the following Equation 14.

[Equation 14]

If FPCT is set to 2 (FPCT=2), UCAS _SB for i values ( i = 1 and i = 2) _{, i} can use UCAS _{SB, 0} signal transmission in SFH. If FPCT is set to 2 (FPCT=2), each of FP0 and FP3 becomes empty, L _{SB-CRU, FP0 is} set to zero (L _{SB-CRU, FP0} =0), and L _{SB-CRU, FP3} is set. To zero. Regarding i=1 and i=2, L _{SB-CRU is} reached _{, FPi} = N ₁ ‧UCAS _SB,0 .

Figure 13 is a flow chart showing one of the ranging signal transmissions in accordance with an embodiment of the present invention.

Referring to Fig. 13, the BS may transmit a preamble (e.g., SA-preamble) carrying a cell service area ID (IDcell) indicating cell service area ID information in step S1010a. In addition, the BS determines a UL frequency partition for a particular cell service area, and may transmit UL Frequency Partition Configuration (UFPC) information to UEs located in a particular cell service area in step S1010b. The BS can broadcast UFPC information through SFH.

The UE may receive the foregoing in step S1010a, and may acquire a cell service area ID from the received preamble. For example, the UE may derive a cell service area ID from the SA-preamble using the following method. Each cell service area has one cell service area ID (IDcell) represented by an integer from 0 to 767. The cell service area ID (IDcell) can be defined by a segment index. In general, the IDcell can be determined by Equation 15 below.

[Equation 15]

IDcell = 256n + Idx

In Equation 15, n is an index indicating the SA-preamble carrier set 0, 1, and 2 of the segment ID. The segment ID can be determined according to the following description.

The number of subcarriers allocated to an SA-preamble can be changed according to the size of the FFT (Fast Fourier Transform). For example, the length of the SA-preamble may have 144, 288, and 576 for 512-FFT, 1024-FFT, and 2048-FFT, respectively. In the case where one of the FDMA/SC-FDMA transmitters M-point IFFT module performs 512-IFFT, up to 144 carriers can be allocated to an SA-preamble. In the case of 1024-IFFT, up to 288 carriers can be allocated to an SA-preamble. In the case of 2048-IFFT, up to 576 carriers can be allocated to an SA-preamble. If the subcarriers of the subcarrier index systems 256, 512, and 1024 respectively reserve DC components for 512-FFT, 1024-FFT, and 2048-FFT, the subcarriers allocated to the SA-preamble may be determined according to the following equation.

[Equation 16]

In Equation 16, SAPreambleCarrierSet _n specifies that all secondary carriers are assigned to a particular SA-preamble. In Equation 16, n is a carrier set index indicating the segment ID. Fragment 0 uses carrier set 0, segment 1 uses carrier set 1, and segment 2 uses carrier set 2. N _SAP refers to the number of secondary carriers allocated for the SA-preamble, and may have values of 144, 288, and 576 for 512-FFT, 1024-FFT, and 2048-FFT. In addition, k performs index 0 to N _SAP -1 for each FFT size.

Idx can be determined according to the following equation.

[Equation 17]

In Equation 17, q performs an index of 0 to 255. An SA-preamble is usually divided into a plurality of sequence sub-blocks. In the case of 512-FFT, the 288-bit SA-preamble is divided into eight sub-blocks A, B, C, D, E, F, G, and H each having a length of 36 bits, which can then be mapped into To the secondary carrier. Each sequence sub-block consists of 3 PRUs. In other words, each sequence sub-block includes 54 subcarriers. In addition, after sequentially modulating A, B, C, D, E, F, G, and H, A, B, C, D, E, F, G, and H are mapped to SA-preamble times corresponding to the segment ID. Carrier set. In the case of an FFT greater than 512-FFT, the basic sub-blocks A, B, C, D, E, F, G, and H are repeated in the same order and then mapped into an SA-preamble subcarrier set. For example, in the case of 1024-FFT, E, F, G, H, A, B, C, D, E, F, G, H, A, B, C, and D are modulated and then sequentially mapped to SA. -preamble subcarrier set. Each segment ID has a different sequence sub-block. The 256 sequences used for the sequence sub-blocks A, B, C, D, E, F, G, and H are defined for each fragment ID, and indexed by q from 0 to 255. Thus, a sequence of sub-blocks A, B, C, D, E, F, G, and H corresponding to a particular sequence index q of a particular segment ID can be identified from 256 sequences for a particular segment ID.

Therefore, the UE may derive a cell service area ID (IDcell) based on one of the SA-preamble sub-block sequences and an SA-preamble carrier set index.

Alternatively, the UE may receive UL Frequency Partition Configuration (UFPC) information in step S1010b, and may configure one or more frequency partitions (FPs) based on the UFPC information. The UE can identify the number of FPs and the size of each FP based on the UFPC information.

On the other hand, the UE can determine an FFR mode for the configured FP from the FFR mode. The FFR mode for each cell service area can be determined for a cell-specific service area. For example, if four frequency partitions (FPs) are configured, one of the FFR modes (mode 1, mode 2, and mode 3) can be selected for each cell service area. In another example, if three FPs are configured and the FP3 size is not equal to zero (0), the FFR mode for each cell service area can be selected from the same mode as the FFR mode as shown in FIG.

The FFR mode can be determined specific to the cell service area. The BS may transmit information indicating that an FFR mode is to be used by the UE to the UE. However, one of the cell service areas UE may derive a cell service area ID (IDcell) from the SA-preamble, and may determine the FFR mode according to the cell service area ID (IDcell). In addition, the FFR mode for a particular cell service area can be determined based on the SA-preamble specific to the cell service area delivery. For example, each cell service area adopts an FFR mode corresponding to the mode k determined by the following equation.

[Equation 18]

k = Segment_ID +1

For example, a UE that has received a transmitted SA-preamble using carrier set 0 may decide that mode 1 is an FFR mode to be used by the UE. In this case, the signal transmission of the BS without additional information is used to inform the UE of the FFR mode.

The UE may determine the frequency resource for the RCH using an IDcell and UL Frequency Partition Configuration (UFPC) information in accordance with any of the first to third embodiments of the present invention at step S1020. According to a first embodiment of the present invention, the non-synchronized UE may determine frequency resources for the NS-RCH according to Equations 4 and 6. The synchronous UE can determine the frequency resource for the S-RCH according to Equations 5 and 6. According to a second embodiment of the present invention, the non-synchronized UE may determine the frequency resource for the NS-RCH according to Equations 7 and 9, and the synchronous UE may determine the frequency resource for the S-RCH according to Equations 8 and 9. According to a third embodiment of the present invention, the non-synchronized UE may determine the frequency resource for the NS-RCH according to Equations 10 and 12, and the synchronous UE may determine the frequency resource for the S-RCH according to Equations 9 and 12.

For the BS non-synchronized UE, a ranging signal may be transmitted to the BS using the allocation NS-RCH in step S1030. The UE synchronized to the BS may transmit a ranging signal to the BS using the allocation S-RCH in step S1030.

The BS has identified an IDcell, a UFPC, and an FFR mode so that the BS can decide which frequency resource to use for RCH transmission. The BS may receive a ranging signal from the UE using the RCH allocated to the resource determined according to any one of the first to third embodiments of the present invention at step S1030.

The BS processor 400b may control the BS transmitter 100b at step S1010a for transmitting a preamble (e.g., SA-preamble) carrying a cell service area ID (IDcell) as one of the cell service area ID information. Further, BS processor 400b may determine a UL frequency partition configuration (UFPC) for a particular cell service area at step S1010b, and may control BS transmitter 100b to transmit UFPC information to a UE located at a particular cell service area. The BS 400b can control the BS transmitter 100b to broadcast the UFPC through the SFH.

The UE receiver 300a may receive the above preamble at step S1010a. The UE processor 400a may derive a cell service area ID (IDcell) from the foregoing. For example, as can be seen from Equations 15 through 17, the UE processor 400a may acquire an ID cell based on the SA-preamble sequence and the SA-preamble carrier set index.

On the other hand, the UE receiver 300a may receive UL Frequency Partition Configuration (UFPC) information from the BS at step S1010b. The UE processor 400a can configure one or more FPs based on the UFPC information. For example, the UE processor 400a may allocate a resource unit (RU) to each frequency partition (FP) according to the number of FPs indicated by the UFPC information and each FP size. For example, according to Tables 1 to 3, the UE processor 400a can recognize not only the FP allocated by a resource unit (RU) from the FP (FP0: FP1: FP2: FP3) but also the resource unit allocated to each FP based on a DFPC. (RU) number. The UE processor 400a does not assign a resource unit (ie, 0 resource unit) to an FP of FP (FP0: FP1: FP2: FP3) having a value corresponding to zero (0). That is, an FP having a value corresponding to zero is not configured. The UE transmitter 100a may map the PRU to each FP under the control of the UE processor 400a.

Alternatively, UE processor 400a may determine an FFR mode for the configured FP from the FFR modes. For example, if the BS transmits information indicating the FFR mode, the UE processor 400a may determine different power levels of the FP according to the indicated FFR mode. In another example, UE processor 400a may determine an FFR mode based on an IDcell or SA-preamble carrier set index. In the case where the FFR mode is determined according to the SA-preamble carrier set index, the UE processor 400a may determine the FFR mode according to Equation 18. Therefore, the UE processor 400a according to an embodiment of the present invention can determine which FP system power is raised from the reuse-3 partition and then use the -1 partition.

The UE processor 400a may allocate frequency resources for the RCH using the IDcell and frequency partition configuration information (ie, UFPC) in accordance with any of the first to third embodiments of the present invention at step 1020. If the UE is not synchronized to the BS, the UE processor 400a according to the first embodiment of the present invention may allocate frequency resources for the NS-RCH according to Equations 4 and 6. If the UE is synchronized with the BS, the UE processor 400a may allocate frequency resources for the S-RCH according to Equations 5 and 6. If the UE is not synchronized to the BS, the UE processor 400a according to the second embodiment of the present invention may allocate frequency resources for the NS-RCH according to Equations 7 and 9. If the UE is synchronized to the BS, the UE processor 400a may allocate frequency resources for the S-RCH according to Equations 8 and 9. If the UE synchronizes with the BS, the UE processor 400a according to the third embodiment of the present invention may allocate frequency resources for the NS-RCH according to Equations 10 and 12. If the UE is not synchronized for the BS, the UE processor 400a may determine the frequency resource for the S-RCH according to Equations 9 and 12.

The UE non-synchronized UE processor 400a may control the UE transmitter 100a to transmit a ranging signal to the BS using the assigned NS-RCH at step S1030. The UE processor 400a for BS synchronization may control the UE transmitter 100a to transmit a ranging signal to the BS using the assigned S-RCH at step S1030.

The BS processor 400b has identified an IDcell, a UFPC, and an FFR mode for a particular cell service area such that the BS processor 400b can identify which frequency resource is used for RCH transmission by the UE located at a particular cell service area. According to any of the first to third embodiments of the present invention, the BS processor 400b may determine the frequency resource of the RCH for the ranging signal transmission of the UE. The BS processor 400b can control the BS receiver 300b to receive the ranging signal using the RCH allocated to the determined frequency resource. In the NS-RCH allocated to the frequency resources determined by Equations 4 and 6, or in the S-RCH allocated to the frequency resources determined by Equations 5 and 6, the BS processor 400b according to the first embodiment of the present invention may The BS receiver 300b is controlled to receive the UE ranging signal. The BS processor 400b according to the second embodiment of the present invention can control the BS receiver 300b to be allocated to the NS-RCH allocated to the frequency resources determined by Equations 7 and 9 or to the frequency resources determined by Equations 8 and 9. Receive the UE ranging signal in the S-RCH. The BS processor 400b according to the third embodiment of the present invention may control the BS receiver 300b to be allocated to the NS-RCH allocated to the frequency resources determined by Equations 10 and 12 or to the frequency resources determined by Equations 11 and 12. Receive the UE ranging signal in the S-RCH.

In accordance with the above-described embodiments of the present invention, the RCH can be allocated in accordance with this mode of reducing interference affecting an adjacent cell service area. Moreover, in accordance with a particular embodiment of the present invention, the concentration and assignment of too many UL control channels to a particular FP is prevented, such that the likelihood of lacking data resources in a particular FP can be reduced. In conclusion, according to a particular embodiment of the invention, one of the total throughput of a communication system can be improved.

It will be apparent to those skilled in the art that the present invention may be embodied in a particular form without departing from the spirit and scope of the invention. The specific embodiments described above are therefore to be considered in a The scope of the invention is to be determined by a reasonable interpretation of the scope of the appended claims, and all changes that fall within the scope of the invention are included in the scope of the invention.

Embodiments of the invention may be applied to base stations, user equipment, or other communication devices in a wireless communication system.

100. . . Wireless communication system

100a. . . Transmitter

100b. . . Transmitter

102a. . . Geographical area

102b. . . Geographical area

102c. . . Geographical area

104a. . . region

104b. . . region

104c. . . region

110. . . MIMO encoder

110a. . . Base station/BS

110b. . . Base station/BS

110c. . . Base station/BS

120. . . MIMO precoder

120a-120i. . . User equipment/UE

130. . . FFT module

140-1 to 140-K. . . Secondary carrier

150. . . OFDMA signal generator

200a. . . Memory

200b. . . Memory

210. . . CP remover

220. . . FFT module

230. . . Subcarrier demapper/equalizer

240. . . IFFT module

250. . . Multiplexer

260. . . MIMO decoder

300a. . . receiver

300b. . . receiver

400a. . . processor

400b. . . processor

500a. . . Control antenna

500b. . . Control antenna

500-1 to 500-N. . . Transmitting antenna

The accompanying drawings, which are incorporated in and in in In the picture:

Figure 1 is a diagram illustrating the configuration of an exemplary wireless communication system;

2 is a block diagram of a user equipment (UE) and a base station (BS) for implementing one embodiment of the present invention;

Figure 3 is a block diagram of an exemplary transmitter in a user equipment (UE) and a base station (BS);

4 is a diagram showing an exemplary structure of a radio frame of IEEE 802.16m for a wireless communication system in accordance with an embodiment of the present invention;

Figure 5 exemplarily illustrates frequency partitioning for frequency division reuse (FFR);

Figure 6 exemplarily illustrates a downlink sub-frame structure for one of the IEEE 802.16m systems;

Figure 7 illustrates an example in which a plurality of frequency partitions are used in adjacent cell service areas;

Figures 8 and 9 illustrate a ranging channel structure that may be used in a particular embodiment of the invention in a time domain;

Figure 10 exemplarily illustrates a ranging channel (RCH) allocation according to a first embodiment of the present invention;

FIG. 11 exemplarily illustrates a ranging channel (RCH) allocation according to a second embodiment of the present invention;

FIG. 12 exemplarily illustrates a ranging channel (RCH) allocation according to a third embodiment of the present invention; and

Figure 13 is a flow chart showing one of the ranging signal transmissions in accordance with an embodiment of the present invention.

There is no component symbol in this representative figure

Claims (8)

A method for transmitting a ranging signal by a user equipment (UE) in a wireless communication system, the method comprising the steps of: receiving frequency partition configuration information from a base station (BS); The cell service area ID information (IDcell) and the frequency partition configuration information determine a ranging channel (RCH) in a re-use-1 frequency partition, or change to a power increase when the -1 frequency partition is not used again. Determining the RCH by using a -3 frequency partition; and using the RCH to transmit the ranging signal to the BS, wherein: when the UE is not synchronized to the BS, the RCH is a non-synchronous ranging channel (NS-RCH) And a frequency resource for the NS-RCH is determined according to Equation 1: [Equation 1] I _SB = mod ( IDcell , R _SB ) where I _SB is used for the NS-RCH from the R _SB sub-band The primary frequency band index (0, .., R _SB -1), and Equation 2 determines R _SB : Where L _{SB-CRU, FPi} is a number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition FPi, and FPi corresponds to the re-use-1 frequency partition or only when there is no reuse-1 frequency partition The -3 frequency partition is used corresponding to the power increase. The method of claim 1, wherein: when the UE synchronizes with the BS, the RCH is a synchronous ranging channel (S-RCH), and a frequency resource for the S-RCH is determined according to Equation 3: Equation 3] I _{SB , s} = mod ( IDcell +1, R _SB ) where I _{SB, s} is used for the primary band index (0, .., R _SB -1 from the S-RCH in the R _SB sub-band ). A method for receiving a ranging signal by a base station (BS) in a wireless communication system, the method comprising the steps of: transmitting frequency partition configuration information; and cell service area ID information based on the BS (IDcell And the frequency partition configuration information, using a ranging channel (RCH) in a re-use-1 frequency partition to receive the ranging signal from a user equipment (UE), or when there is no reuse-1 frequency partition The RCH is used to receive the ranging signal from the UE in a power boost and then use -3 frequency partition, wherein: when the UE is not synchronized to the BS, the RCH is a non-synchronous ranging channel (NS-RCH), and a frequency resource for the NS-RCH is determined according to Equation 1: [Equation 1] I _SB = mod ( IDcell , R _SB ) where I _SB is used from the R _SB sub-band The primary frequency band index (0, .., R _SB -1) of the NS-RCH, and the R _{SB is} determined by Equation 2: Where L _{SB-CRU, FPi} is a number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition FPi, and FPi corresponds to the re-use-1 frequency partition or only when there is no reuse-1 frequency partition The -3 frequency partition is used corresponding to the power increase. The method of claim 3, wherein: when the UE synchronizes with the BS, the RCH is a synchronous ranging channel (S-RCH), and a frequency resource for the S-RCH is determined according to Equation 3: Equation 3] I _{SB , s} = mod ( IDcell +1, R _SB ) where I _{SB, s} is used for the primary band index (0, .., R _SB -1 from the S-RCH in the R _SB sub-band ). A user equipment (UE) for transmitting a ranging signal in a wireless communication system, the UE comprising: a receiver; a transmitter; and a processor configured to control the receiver And the transmitter, wherein the receiver is configured to receive frequency partition configuration information from a base station (BS), and the processor is based on the cell service area ID information (IDcell) of the BS and the frequency partition configuration information Determining a RCH in a re-use -1 frequency partition, or determining the RCH in a power boost and then using -3 frequency partition when no -1 frequency partition is used again, and the processor Using the RCH to control the transmitter to transmit the ranging signal to the BS, wherein: when the UE is not synchronized to the BS, the RCH is a non-synchronous ranging channel (NS-RCH), and the processor It is configured to determine a frequency resource for the NS-RCH according to Equation 1: [Equation 1] I _SB = mod ( IDcell , R _SB ) where I _SB is used for the NS-RCH from the R _SB sub-band Primary band index (0, .., R _SB -1), and the processor is configured to determine R _SB according to Equation 2: [Equation 2 ] Where L _{SB-CRU, FPi} is a number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition FPi, and FPi corresponds to the re-use-1 frequency partition or only when there is no reuse-1 frequency partition The -3 frequency partition is used corresponding to the power increase. The user equipment (UE) of claim 5, wherein: when the UE synchronizes with the BS, the RCH is a synchronous ranging channel (S-RCH), and the processor is configured to determine according to Equation 3. A frequency resource for the S-RCH: [Equation 3] I _{SB , s} = mod ( IDcell +1, R _SB ) where I _{SB, s} is used for the S-RCH from the R _SB sub-band Band index (0, .., R _SB -1). A base station (BS) for receiving a ranging signal in a wireless communication system, the BS comprising: a transmitter; a receiver; and a processor that controls the transmitter to transmit a frequency partition group State information, and the processor controls the receiver to use a ranging channel (RCH) in a reuse-1 frequency partition based on the cell service area ID information (IDcell) of the BS and the frequency partition configuration information. Receiving the ranging signal from a user equipment (UE), or using the RCH in a power boost and then using the -3 frequency partition when the unused -1 frequency partition is not used, receiving the ranging from the UE a signal, wherein: when the UE is not synchronized for the BS, the RCH is a non-synchronous ranging channel (NS-RCH), and the processor is configured to determine a one for the NS-RCH according to Equation 1. Frequency resource: [Equation 1] I _SB = mod ( IDcell , R _SB ) where I _SB is used for the primary band index (0, .., R _SB -1) from the NS-RCH in the R _SB sub-band, And the processor is configured to determine R _SB according to Equation 2: Where L _{SB-CRU, FPi} is a number of sub-band contiguous resource elements (CRUs) allocated to a frequency partition FPi, and FPi corresponds to the re-use-1 frequency partition or only when there is no reuse-1 frequency partition The -3 frequency partition is used corresponding to the power increase. The base station (BS) of claim 7, wherein: when the UE synchronizes with the BS, the RCH is a synchronous ranging channel (S-RCH), and the processor is configured to determine according to Equation 3. A frequency resource of the S-RCH: [Equation 3] I _{SB , s} = mod ( IDcell +1, R _SB ) where I _{SB, s} is used for the primary frequency band from the S-RCH in the R _SB sub-band Index (0, .., R _SB -1).