JP2008526091A5 - - Google Patents

Description

Signal communication with non-coherent detection in broadband wireless access systems

  The present invention relates to communication of non-coherently detectable signals that can be used in broadband wireless access systems, and in particular, orthogonal frequency division multiplexing (OFDM) access systems.

  In order to allow a plurality of users to use limited radio resources at the same time, a multiplexing method is required. Multiplexing techniques divide a single line or transfer path into multiple channels that can simultaneously transmit / receive individual independent signals. For example, a frequency division multiplexing (FDM) technique for signal multiplexing by dividing a single line into a plurality of frequency bands, and signal multiplexing by dividing a single line into a plurality of very short time intervals There are various multiplexing techniques, such as a time division multiplexing (TDM) technique for performing.

  Currently, with increasing demand for multimedia data in mobile communications, a multiplexing method for efficiently transferring a large amount of data is required. A representative multiplexing method is an orthogonal frequency division multiplexing (OFDM) method.

  The OFDM method refers to a digital modulation method that can improve the transfer rate per bandwidth and prevent multipath interference. The OFDM method is characterized in that it functions as a multiple subcarrier modulation method using a plurality of subcarriers orthogonal to each other. Therefore, even if the frequency components of the individual subcarriers overlap each other, there is no problem with the OFDM technique. The OFDM technique can multiplex more subcarriers than a general frequency division multiplexing (FDM) technique. Therefore, high frequency use efficiency is realized.

  The mobile communication system based on the above-described OFDM method currently uses various multiple access methods capable of allocating radio resources to a plurality of users, for example, OFDM-FDMA (OFDMA) method, OFDM-TDMA method and An OFDM-CDMA method or the like can be given. In particular, the OFDMA (Orthogonal Frequency Division Multiple Access) approach allocates a portion of all subcarriers to individual users to accommodate multiple users.

  FIG. 1 is a diagram illustrating a method of allocating radio resources according to related technology. Referring to FIG. 1, the broadband wireless access system includes the specific configuration of FIG. 1 as a basic unit for allocating OFDMA uplink radio resources. The specific configuration shown in FIG. 1 is called a tile structure. In this tile structure, channel quality indication channel (CQICH) data or acknowledgment channel (ACKCH) data is transferred through a plurality of data subcarriers 102, 103, 105, 106, 107, 108, 110 and 111. The pilot channel is transferred through pilot subcarriers 101, 104, 109 and 112. Each subcarrier transmitted through the tile structure is called a unit of the tile structure.

  The present invention is directed to communicating non-coherent detectable signals for use in orthogonal frequency division multiplexing (OFDM) access systems.

  Additional features and advantages of the present invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from consideration of the following description or practice of the invention. It becomes clear from.

  The above objects and additional advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

  In order to obtain such additional features and advantages and achieve the objectives of the present invention, the present invention uses orthogonal frequency division multiplexing (OFDM) as embodied and extensively described. It is embodied in a method for allocating radio resources in a radio communication system. The method includes receiving data associated with a radio resource allocation map from a base station at a mobile station, wherein the radio allocation map includes control parameters for transferring an uplink channel, and the uplink The channel is a first set of subcarriers associated with representing at least a portion of an n-bit data payload and a second set of subcarriers associated with representing at least a portion of a non-pilot m-bit data payload. The mobile station comprising one or more OFDM tiles, wherein the subcarrier carries modulated data, the first set and the second set of subcarriers being mutually exclusive Transferring an uplink channel from the mobile station to the base station.

Preferably, the uplink channel, x-axis represents the time domain, y-axis comprises a tile primary (primary) as shown below representing the frequency domain.

Preferably, the uplink channel further comprises secondary tiles as shown in the figure below, with the x-axis representing the time domain and the y-axis representing the frequency domain.

In one aspect of the invention, information associated with the use of either of the first and second sets of subcarriers is received at the mobile station using a normal map information element.

  In another aspect of the present invention, information related to utilization of either the first or second set of subcarriers is received at the mobile station using the HARQ map information element.

  Preferably, the first set of subcarriers is associated with representing at least a portion of a 6-bit data payload. Preferably, the second set of subcarriers is associated with representing at least a portion of a 4-bit data payload.

  Yet another aspect of the invention relates to the uplink channel transferring one of channel quality information, antenna selection options and a precoding matrix codebook.

  Preferably, the uplink channel comprises: fast downlink measurement, MIMO mode, antenna grouping, antenna selection, reduced codebook, quantized precoding weight feedback, precoding in codebook Associated with transferring one of an index to the matrix, channel matrix information and per stream power control.

  Preferably, the use of a second set of subcarriers for transferring at least a portion of the m-bit data payload is requested by either the base station or the mobile station.

  Preferably, the six OFDM tiles contain one OFDM slot for representing a 4-bit data payload, which is represented as follows:

The vector index in the above table is expressed as follows.

According to another embodiment of the present invention, in a method for allocating radio resources in a radio communication system using orthogonal frequency division multiplexing (OFDM), transferring data associated with a radio resource allocation map to a mobile station and the mobile Receiving an uplink channel from a station, wherein the radio assignment map includes control parameters for receiving the uplink channel, wherein the uplink channel represents at least a portion of an n-bit data payload One or more OFDM tiles including a first set of subcarriers associated with and a second set of subcarriers associated with representing at least a portion of a non-pilot m-bit data payload, said respective subcarriers Carries modulated data and the first and second sets of subcarriers are mutually exclusive Radio resource allocation method which is a basis (exclusive) is provided.

  According to another embodiment of the present invention, a mobile communication apparatus for allocating radio resources in a radio communication system using orthogonal frequency division multiplexing (OFDM) is a receiver that receives data associated with a radio resource allocation map from a base station. And a transmitter for transferring an uplink channel from the mobile communication device to the base station, wherein the radio assignment map includes a control parameter for transferring the uplink channel, and the uplink channel is n One or more OFDM tiles including a first set of subcarriers associated with representing at least a portion of the bit data payload and a second set of subcarriers associated with representing at least a portion of the non-pilot m-bit data payload Each sub-carrier carries modulated data, the first of the sub-carriers The second set radio communication apparatus characterized by are mutually exclusive (exclusive) is provided.

  It will be appreciated that both the general description of the invention described above and the following detailed description are exemplary and explanatory and provide additional explanation of the invention as claimed.

  The present invention is applicable to a broadband wireless connection system.

  The present invention relates to allocating radio resources in a wireless communication system using orthogonal frequency division multiplexing (OFDM).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals as much as possible.

  Preferably, the present invention is applied to a broadband wireless access system such as the system announced in IEEE 802.16, but is not limited thereto, and the present invention is applicable to other types of wireless access systems. .

  Typically, channel measurements are made on data subcarriers based on pilot subcarriers, such that coherent detection techniques are used for data subcarriers. However, ACKCH or CQICH uses non-coherent detection techniques without making channel measurements. Meanwhile, this ACKCH or CQICH uses orthogonal codewords to implement a non-coherent detection method.

  Table 1 below illustrates a codeword for modulating the ACKCH subcarrier when 1-bit ACK information is provided.

Table 2 below illustrates a codeword for modulating the CQICH subcarrier when 6-bit CQI information is provided.

Table 3 below illustrates a codeword for modulating the CQICH subcarrier when 5-bit CQI information is provided.

Table 4 below illustrates a codeword for modulating the CQICH subcarrier when 4-bit CQI information is provided.

Referring to Table 4, the vector of each tile includes 8 quadrature phase transition keying (QPSK) symbols so that the signal can be transferred by 8 data subcarriers.

Referring to Table 5, P0, P1, P2, and P3 are represented by the following formula 1.

A single secondary channel contains 6 tiles. CQICH can use a single secondary channel and ACKCH can use half of the secondary channel. In other words, CQICH can use 6 tiles and ACKCH can use 3 tiles.

  FIG. 2 is a diagram illustrating a method for allocating a CQICH (channel quality indication channel) region and an ACKCH (acknowledgment channel) region in an OFDM uplink according to an embodiment of the present invention. Referring to FIG. 2, a partial area of the uplink two-dimensional map is pre-allocated to the ACKCH dedicated (dedicated) area 201, and the remaining areas are pre-allocated to the CQICH dedicated area 202.

  Each subchannel is allocated to the ACKCH dedicated area 201 and the CQICH dedicated area 202 so that a specific MSS (Mobile Subscriber Station) can use the ACKCH dedicated area 201 and the CQICH dedicated area 202. Referring to FIG. 2, MSS # 1 can be assigned to ACK # 1, MSS # 2 can be assigned to ACK # 2, ..., MSS # 8 can be assigned to ACK # 8, MSS # 9 can be assigned to CQICH # 1, MSS # 10 can be assigned to CQICH # 2 and CQICH # 3, and MSS # 11 can be assigned to CQICH # 4.

  If the base station uses a non-coherent detection technique, there is no need to use pilot subcarriers. In this case, it is not necessary to use four pilot subcarriers allocated to each tile, and uplink radio resources and terminal transfer power are not consumed excessively.

  Thus, new information is carried on the subcarriers assigned to the pilot channel, and specific information based on non-coherent detection techniques in the same manner as CQICH or ACKCH is transmitted by conventional subcarriers with pilot signals. Thereafter, it is transferred to the CQICH and ACKCH tile structures so that it can be transferred.

  FIG. 3 is a diagram illustrating a tile structure when a new signal is transferred using a subcarrier that has transferred a pilot signal according to an embodiment of the present invention. Referring to FIG. 3, the new signal can be transferred by subcarriers 301, 304, 309 and 312. These subcarriers are used to transfer pilot signals.

As described above, when the new signal is placed on the subcarriers that were transmitting pilot signals in the tile structure for CQICH and ACKCH, the subcarriers that were transmitting each pilot signal are additional It is called a subcarrier. When the additional subcarriers are formed by grouping the unit tile structure (grouping The) is used, the CQICH and secondary of ACKCH primary in ACKCH and primary of CQICH of (primary) without secondary (secondary-) is acquired Can do.

FIG. 4 is a diagram illustrating a method for obtaining a secondary CQICH from a CQICH tile structure according to an embodiment of the present invention. Referring to FIG. 4, a single CQICH includes 6 tile units (1 subchannel) and 4 additional subcarriers so that all 24 additional subcarriers can be obtained from each CQICH. A carrier wave can be obtained from each tile unit. Meanwhile, an ACKCH or secondary CQICH can include 3 tile units (1/2 subchannels), and each tile unit is constructed using a single ACKCH or secondary CQICH using 24 subcarriers. As shown, eight subcarriers are included. Thus, a single ACKCH (ie, the secondary ACKCH) or secondary CQICH can be constructed using 24 additional subcarriers that can be obtained from a single CQICH.

FIG. 5 is a diagram illustrating a method for acquiring a secondary ACKCH from two ACKCH tile structures according to an embodiment of the present invention. Referring to FIG. 5, a single ACKCH can include 3 tile units, so that 4 additional subcarriers can be obtained from all 2 ACKCHs. Can be obtained from each tile unit. On the other hand, a single ACKCH (ie, the secondary ACKCH) is constructed with 24 sub-carriers as shown in FIG. 5 so as to be constructed when an additional sub-carrier is acquired from a group including two ACKCHs. It can be constructed using a carrier wave.

FIG. 6 is a diagram illustrating a method for obtaining a secondary CQICH from two CQICH tile structures according to an embodiment of the present invention. Referring to FIG. 6, each CQICH can include 6 tile units so that a total of 48 additional subcarriers can be obtained from 2 CQICHs, and 4 additional units from each tile unit. Subcarriers are acquired. Meanwhile, the CQICH also includes 6 tile units so that a single CQICH can be constructed using 48 subcarriers, and each tile unit includes 8 subcarriers. Thus, a single CQICH (ie, a secondary CQICH) can be constructed with 48 additional subcarriers that can be obtained from two CQICHs.

FIG. 7 is a diagram illustrating a method for obtaining a secondary CQICH from four ACKCH tile structures according to an embodiment of the present invention. Referring to FIG. 7, a single ACKCH may include 3 tile units so that a total of 48 additional subcarriers can be obtained from 4 ACKCHs. Additional subcarriers can be acquired. Meanwhile, the CQICH can include 6 tile units so that a single CQICH can be constructed using 48 subcarriers, and each tile unit includes 8 subcarriers. Thus, a single CQICH (ie, secondary CQICH) can be constructed with 48 additional subcarriers that can be obtained from 4 ACKCHs.

  Preferably, the following method can be configured to assign codewords to subcarriers. According to the first preferred embodiment of the present invention, as shown in Tables 6 to 9 below, 12 tiles contained in a single CQICH or 2 ACKCHs are grouped into 6 sets. Each group includes two tiles and can be assigned a codeword.

Table 6 below illustrates a method for allocating codewords to modulate a secondary ACKCH subcarrier when 1-bit ACK information is provided.

Table 7 below illustrates a method for allocating codewords to modulate the CQICH subcarrier when 6-bit CQI information is provided.

Table 8 below illustrates a codeword for modulating the CQICH subcarrier when 5-bit CQI information is provided.

Table 9 below illustrates a codeword for modulating the CQICH subcarrier when 4-bit CQI information is provided.

On the other hand, according to the second preferred embodiment of the present invention, as shown in Tables 10 and 11 below, a codeword is assigned to each of 12 tiles contained in a single CQICH or two ACKCHs. Can be done.

Table 10 below illustrates a method for assigning codewords to modulate a secondary ACKCH subcarrier when 1-bit ACK information is provided.

Additional subcarriers for tiles applied to the codeword assignments shown in Table 11 are shown in FIG.

  FIG. 8 illustrates a tile structure used in a method for allocating codewords using additional subcarriers according to an embodiment of the present invention.

  Referring to FIG. 8 and Table 12 below, the vector assigned to each tile includes four modulation symbols to perform signal transfer through four additional subcarriers.

The secondary ACKCH can be constructed using 24 subcarriers assigned to the pilot channel. A method of constructing an ACKCH using 24 pilot subcarriers may be implemented with additional subcarriers by various methods other than the methods illustrated in FIGS. 9 and 10.

The secondary ACKCH can be configured using three tiles. Table 13 below illustrates codewords that can be used when the above-described secondary ACKCH includes three tiles.

A secondary CQICH can be constructed using 48 pilot subcarriers. A method for constructing ACKCH using 48 pilot subcarriers may be implemented with additional subcarriers by various methods other than the methods illustrated in FIGS. 6 and 7.

The secondary CQICH can be constructed using 6 tiles. Table 14 below illustrates codewords that can be applied when the above-described secondary CQICH includes six tiles.

On the other hand, new codewords can be constructed using binary phase transition keying (BPSK) as shown in Table 15 below.

The base station may use the message shown in Table 16 below to inform the mobile subscriber station (MSS) of information related to the secondary ACKCH.

According to Table 16, the “UL-MAP type” field and the “subtype” field may be changed to inform the MSS of message type information. In other words, the MSS can recognize the content information of the corresponding message by referring to the “UL-MAP type” and “subtype” fields described above. On the other hand, the “length” field informs the MSS of the size information of the entire message including the “length” field in bytes.

In the “ primary / secondary H-ARQ area indication” field, the H-ARQ area of the current frame is different from the H-ARQ area of the past frame, or another H-ARQ area exists in the same frame. Then it has a value of 1. The “OFDMA symbol offset” field informs the MSS of the coordinates (coordinates) where the “H-ARQ” region starts from the uplink. The “sub-channel offset” field informs the MSS the coordinates (coordinates) where the “H-ARQ” region starts from the uplink. In the “No. OFDMA symbols” field, the MSS is informed of the size information occupied by the “H-ARQ” area on the uplink in symbol units. In the “No. Sub-channels” field, the size information occupied by the “H-ARQ” area in the uplink is notified to the MSS in units of subchannels.

On the other hand, the base station can use the message shown in Table 17 below to inform the MSS of information related to the secondary CQICH.

According to Table 17, the “UL-MAP type” field and the “subtype” field may be changed to inform the MSS of message type information. In other words, the MSS can recognize the message content information by referring to the “UL-MAP type” and “subtype” fields described above. On the other hand, the “length” field informs the MSS of size information of the entire message including the “length” field in byte units.

The “ primary / secondary CQICH area indication” field has a value of 1 when the CQICH area of the current frame is different from the CQICH area of the previous frame or when another CQICH area exists in the same frame. The “OFDMA symbol offset” field informs the MSS of the coordinates (coordinates) where the “CQICH” region starts from the uplink. The “subchannel offset” field informs the MSS the coordinates (coordinates) where the “CQICH” region starts from the uplink. The “No. OFDMA symbols” field informs the MSS of size information occupied by the “CQICH” area on the uplink in symbol units. The “No. Sub-channels” field notifies the MSS of the size information occupied by the “CQICH” area in the uplink, in subchannel units.

The information transferred through the secondary CQICH according to the present invention can be used in various ways based on the feedback type. For example, when information related to the signal-to-noise ratio (SNR) is transferred to the base station, the payload of the information can be generated as shown in Equation 2 below.

On the other hand, in the multiple input multiple output (MIMO) mode, the payload shown in Table 18 below can be generated.

Table 19 below illustrates antenna grouping methods corresponding to the respective values shown in Table 18.

Table 20 below illustrates antenna selection methods corresponding to the individual values shown in Table 18.

Table 21 below illustrates how to employ a reduced precoding matrix codebook corresponding to the individual values represented in Table 18.

The BS transmits information related to the feedback type information described above to the MSS through the “CQICH_Enhanced_Alloc_IE” field.

  Table 22 and Table 23 below exemplify a part of “CQICH_Enhanced_Alloc_IE” including the feedback type information described above.

On the other hand, if the information related to the SNR is transferred to the base station, the payload of the information transferred through the secondary CQICH according to the present invention can be generated as shown in Equation 3 below.

Information related to the feedback type that can simply transfer SNR related information to the base station is transferred to the MSS through the “CQICH_Enhanced_Alloc_IE” field.

  Table 24 below illustrates a portion of the “CQICH_Enhanced_Alloc_IE” field that includes the feedback type information described above.

On the other hand, information transferred through the secondary CQICH can be used in various ways depending on the feedback type. That is, the secondary CQICH described above can only be used for MIMO mode selection. If the secondary CQICH is used only for MIMO mode selection, the payload can be generated as shown in Table 25 below.

Table 26 below illustrates antenna grouping methods corresponding to the individual values shown in Table 25.

Table 27 below illustrates antenna grouping methods corresponding to the individual values shown in Table 25.

Table 28 below illustrates how to employ a reduced precoding matrix codebook corresponding to the individual values represented in Table 25.

The BS transmits information related to the feedback type information described above to the MSS through the “CQICH_Enhanced_Alloc_IE” field.

  Table 29 below illustrates a portion of “CQICH_Enhanced_Alloc_IE” that includes the feedback type information described above.

The use of the secondary fast feedback channel is requested by the base station to the MSS, but the MSS has an option to request use by sending a request message to the base station. As will be apparent from the detailed description, the method of receiving a signal capable of non-coherent detection in the broadband wireless access system according to the present invention is a method for receiving other signals instead of pilot signals when signal detection can be performed by a non-coherent detection method. Transfer, and thus increased transfer efficiency can be realized.

  Although the present invention will be described in the context of mobile communications, the present invention can be used in any wireless communication system that uses mobile devices such as PDAs and laptop computers with uniform wireless communication capabilities. is there.

  The preferred embodiment described above may be embodied as a method, mechanism or article of manufacture using standard programming and / or engineering techniques that can produce software, firmware, hardware, or any combination thereof. it can. Here, the product refers to hardware logic (ie, integrated circuit chip, field programmable gate array (FPGA), custom semiconductor, etc.) or computer readable medium (ie, magnetic storage medium (ie, , Hard disk drive, floppy (registered trademark) disk, tape, etc.), optical storage (CD-ROM, optical disk, etc.), volatile and nonvolatile memory devices (ie, EEPROM, ROM, PROM, RAM, DRAM, SRAM, firmware) Software, programmable logic, etc.)) means code or logic embodied in).

  Code in the computer readable medium is connected and executed by a processor. The code embodied in the preferred embodiment is more connectable from a transfer media (media) or a file server (server) on the network. In these cases, the product in which the code is embodied may include a transfer medium such as a network transfer line, a wireless transfer medium, a signal propagated through space, a radio wave, an infrared signal, and the like. Of course, for those skilled in the art, various modifications can be made to this configuration without departing from the scope of the present invention, and the product may contain any information known in the related art. It is clear that it can be included.

  9A and 9B are diagrams illustrating structures of a transmitter apparatus (unit) and a receiver apparatus of a mobile communication device according to an embodiment of the present invention. Referring to FIG. 9A, transmitter apparatus 500 preferably includes a processor 510 for processing the forwarded signal. Prior to transfer, the data bits are channel coded with a channel goda 520, and redundancy bits are added to the data bits. The data bits are subsequently mapped to signals in a symbol mapper 530 in a manner such as QPSK or 16QAM. Subsequently, the signal is subchannel modulated by a subchannel modulator 540 and the signal is mapped to an OFDMA subcarrier. The OFDM waveform signal is then constructed by combining the various subcarriers through an inverse fast Fourier transform (IFFT) 550. Finally, the signal is filtered through a filter 560, converted to an analog signal by a digital-to-analog converter (DAC) 570, and transferred to a receiver by an RF module 580.

  Referring to FIG. 9B, the structure of the receiver 600 of the present invention is similar to the structure of the transmitter 500. However, reverse processing is performed on the signal. Preferably, the signal is received by RF module 680 and subsequently converted to a digital signal by analog to digital converter 670 and filtered by filter 660. After filtering, the signal is subjected to Fast Fourier Transform (FFT) to deconstruct the waveform signal. The signal is then demodulated into subchannels by subchannel demodulator 640, symbol demapped by symbol demapper 630, and channel decoded by channel decoder 620 before being transmitted to processor 610 for processing. Is done.

  Preferably, when the user inputs instruction information, such as a telephone number, into the mobile communication device by pressing a button on the keypad or by voice activation using a microphone, the processor 510 or 610 may The instruction information is received and processed in order to perform an appropriate function such as dialing. Operational data can be retrieved from the storage device to perform the function. Also, the processor 510 or 610 may display instruction information or operation information on a display device for user reference and convenience.

  The processor generates instruction information to the RF module 580 or 680, for example, to initiate communication such as transferring a wireless signal containing voice communication data. The RF module includes a receiver and a transmitter for receiving and transferring wireless signals. The antenna transmits and receives wireless signals and the like. Upon receiving the wireless signal, the RF module transmits the signal and converts it to a baseband frequency for processing by the processor. These processed signals can be converted into audible or readable information output from a speaker, for example.

  The processor stores message history data of messages received by or forwarded to other users, receives conditional requests for message history data input by users, and The conditional request is processed so as to read the message history data corresponding to the conditional request from the storage device, and the message history data is output to the display device. The storage device is configured to store message history data of received messages and forwarded messages.

  It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Therefore, it is to be understood that the present invention includes various modifications and implementations within the scope of the appended claims and their equivalents.

It is a figure which shows the method to allocate the radio | wireless resource by related technology. FIG. 3 is a diagram illustrating a method for allocating a CQICH (channel quality indication channel) region and an ACKCH (acknowledge channel) region in an OFDM uplink according to an embodiment of the present invention. FIG. 6 is a diagram illustrating a tile structure when a new signal is transmitted using a subcarrier to which a pilot signal is transferred according to an embodiment of the present invention. FIG. 6 illustrates a method for acquiring a secondary ACKCH from a CQICH tile structure according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a method for acquiring a secondary ACKCH from two ACKCH tile structures according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a method for obtaining a secondary CQICH from two CQICH tile structures according to an embodiment of the present invention; FIG. 6 is a diagram illustrating a method for obtaining a secondary CQICH from four ACKCH tile structures according to an embodiment of the present invention. FIG. 6 illustrates a tile structure for use in a method for allocating codewords using additional subcarriers according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a structure of a transmitter device (Unit) and a receiver device of a mobile communication device according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a structure of a transmitter device (Unit) and a receiver device of a mobile communication device according to an embodiment of the present invention.

Claims (16)

A method for transferring feedback information by a mobile station in an orthogonal frequency division multiplexing (OFDM) wireless communication system , comprising:
The method
Receiving information related to the uplink feedback channel from the base station;
Anda transferring the primary uplink feedback channel and the secondary uplink feedback channel to the base station using the information,
Wherein the information includes a control parameter for the primary uplink feedback channel and the secondary uplink feedback channel,
The primary uplink feedback channel is composed of 6 uplink tiles, of which the mth uplink tile has the following structure:
Have
The primary uplink feedback channel is used to carry a p-bit payload and is quadrature modulated using 8 quadrature phase transition keying (QPSK) symbols;
M _{n, 8m + k} (0 ≦ k ≦ 7) is the k th QPSK symbol of the m th uplink tile in the n th primary uplink feedback channel,
Before SL secondary uplink feedback channel consists of six uplink tile, m-th uplink tile of which the following structure
Have
The secondary uplink feedback channel is used to carry a q-bit payload (q <p) and is orthogonally modulated using QPSK symbols;
M _{n, 4m + k} (0 ≦ k ≦ 3) is the k th QPSK symbol of the m th uplink tile in the n th secondary uplink feedback channel . The method of claim 1 , wherein p is six . The method of claim 1 , wherein q is 4 . The secondary uplink feedback the relative channel 4 bit payload is mapped to the uplink tile as in the following table,
here,
And where
In a method according to claim 3. A method for receiving feedback information by a base station in an orthogonal frequency division multiplexing (OFDM) wireless communication system , comprising:
The method
Transferring information associated with the uplink feedback channel to the mobile station;
Comprises, receiving a primary uplink feedback channel and the secondary uplink feedback channel from the mobile station using said information,
Wherein the information includes a control parameter for the primary uplink feedback channel and the secondary uplink feedback channel,
The primary uplink feedback channel is composed of 6 uplink tiles, of which the mth uplink tile has the following structure:
Have
The primary uplink feedback channel is used to carry a p-bit payload and is quadrature modulated using 8 quadrature phase transition keying (QPSK) symbols;
M _{n, 8m + k} (0 ≦ k ≦ 7) is the k th QPSK symbol of the m th uplink tile in the n th primary uplink feedback channel,
Before SL secondary uplink feedback channel consists of six uplink tile, m-th uplink tile of which the following structure
Have
The secondary uplink feedback channel is used to carry a q-bit payload (q <p) and is orthogonally modulated using QPSK symbols;
M _{n, 4m + k} (0 ≦ k ≦ 3) is the k th QPSK symbol of the m th uplink tile in the n th secondary uplink feedback channel . The method of claim 5 , wherein p is six . 6. The method of claim 5 , wherein q is 4 . The secondary uplink feedback the relative channel 4 bit payload is mapped to the uplink tile as in the following table,
here,
And where
In a method according to claim 7. A mobile station configured to transfer feedback information in an orthogonal frequency division multiplexing (OFDM) wireless communication system, comprising:
The mobile station comprises a processor and a radio frequency (RF) module that transfers and receives radio signals to and from the outside under the control of the processor;
The processor is
Receiving information related to the uplink feedback channel from the base station;
And forwarding the primary uplink feedback channel and the secondary uplink feedback channel to the base station using the information, it is configured to perform,
Wherein the information includes a control parameter for the primary uplink feedback channel and the secondary uplink feedback channel,
The primary uplink feedback channel is composed of 6 uplink tiles, of which the mth uplink tile has the following structure:
Have
The primary uplink feedback channel is used to carry a p-bit payload and is quadrature modulated using 8 quadrature phase transition keying (QPSK) symbols;
M _{n, 8m + k} (0 ≦ k ≦ 7) is the k th QPSK symbol of the m th uplink tile in the n th primary uplink feedback channel,
Before SL secondary uplink feedback channel consists of six uplink tile, m-th uplink tile of which the following structure
Have
The secondary uplink feedback channel is used to carry a q-bit payload (q <p) and is orthogonally modulated using QPSK symbols;
M _{n, 4m + k} (0 ≦ k ≦ 3) is the mobile station , which is the kth QPSK symbol of the mth uplink tile in the nth secondary uplink feedback channel . The mobile station according to claim 9 , wherein the p is six . The mobile station according to claim 9 , wherein q is four . The secondary uplink feedback the relative channel 4 bit payload is mapped to the uplink tile as in the following table,
here,
And where
In it, the mobile station according to claim 11. A base station configured to receive feedback information in an orthogonal frequency division multiplexing (OFDM) wireless communication system, comprising:
The base station comprises a processor and a radio frequency (RF) module for transferring and receiving radio signals to and from the outside under the control of the processor,
The processor is
Transferring information associated with the uplink feedback channel to the mobile station;
Receiving a primary uplink feedback channel and a secondary uplink feedback channel from the mobile station using the information, and
The information includes control parameters for the primary uplink feedback channel and the secondary uplink feedback channel,
The primary uplink feedback channel is composed of 6 uplink tiles, of which the mth uplink tile has the following structure:
Have
The primary uplink feedback channel is used to carry a p-bit payload and is quadrature modulated using 8 quadrature phase transition keying (QPSK) symbols;
M _{n, 8m + k} (0 ≦ k ≦ 7) is the k th QPSK symbol of the m th uplink tile in the n th primary uplink feedback channel,
The secondary uplink feedback channel includes 6 uplink tiles, and the m-th uplink tile has the following structure.
Have
The secondary uplink feedback channel is used to carry a q-bit payload (q <p) and is orthogonally modulated using QPSK symbols;
M _{n, 4m + k} (0 ≦ k ≦ 3) is a base station that is the kth QPSK symbol of the mth uplink tile in the nth secondary uplink feedback channel. The base station according to claim 13, wherein p is six. The base station according to claim 13, wherein q is four. The 4-bit payload for the secondary uplink feedback channel is mapped to the uplink tile as shown in the table below:
here,
And where
The base station according to claim 15, wherein