JP5445624B2 - Transmitting station and receiving station - Google Patents

Description

  The present invention relates to a transmitting station and a receiving station. The present invention is preferably used in, for example, a system in which a signal is time-multiplexed and transmitted from a mobile station as an example of a transmitting station to a radio base station as an example of a receiving station.

In order to reduce intersymbol interference due to delayed waves, one of wireless communication transmission schemes is to cyclically copy a part of an effective symbol in the time domain, and to CP (Cyclic Prefix) (guard) in the effective symbol. There is a transmission method added as an interval (also called GI).
Typical examples of such transmission systems include OFDM (Orthogonal Frequency Division Multiplexing) and DFT-S OFDM (Discrete Fourier Transform-Spread OFDM).

Among them, since DFT-S OFDM is single carrier transmission, it has excellent PAPR (Peak to Average Power Ratio) characteristics, and can operate a power amplifier (PA) at an efficient operating point.
Therefore, DFT-S OFDM is suitable for an uplink (UL) transmission method that is a direction from a mobile station (UE: User Equipment) to a base station [BS (Base Station) or eNodeB], and 3GPP (3rd Generation Partnership Project) In E-UTRA (Evolved Universal Terrestrial Radio Access), application of SC-FDMA (Single Carrier Frequency Division Multiple Access), which is an access method using DFT-S OFDM, is being studied for UL communication ( For example, see Non-Patent Document 1 below).

  Also, Figure 2 of Non-Patent Document 2 below shows that the shared signal transmitted on the downlink (DL) is adjacent to the block where the reference signal (RS) used for propagation path training (channel estimation) is multiplexed. A transmission format for multiplexing an ACK / NACK signal for a channel and a CQI (Channel Quality Indicator) signal indicating a DL propagation path quality measured at a receiving station is described.

That is, in this transmission format, one slot is composed of seven blocks, the RS is multiplexed to the fourth block in the slot, and the ACK / NACK signal and the CQI signal are the end of the third block adjacent to the RS and 5 Multiplexed at the beginning of the th block.
Note that in 3GPP LTE (Long Term Evolution), EVM (Error Vector Magnitude) indicating signal quality, SEM (Spectrum Emission Mask) regulations, signal power ratio (ACLR: Adjacent Channel Leakage to leakage power to adjacent channel band) (Ratio) is defined (see Non-Patent Document 3 below).

3GPP TS36.211 V8.0.0 3GPP TSG-RAN WG1, R1-073572, "Control Signaling Location in Presence of Data in E-UTRA UL", Samsung 3GPP TS36.101 V0.1.0

In the transmission system in which transmission is performed by adding the CP to the effective symbol, since the signal becomes discontinuous at the boundary of each symbol (OFDM symbol or SC-FDMA symbol) after the CP is added, the frequency spectrum is infinitely widened. Thus, power leaks outside the signal band (this is also referred to as adjacent band radiation).
In order to suppress this, in this transmission system, the signal (symbol) is multiplied by a window function (time window) such as a raised cosine function, or filtered by a band limiting filter, etc. In some cases, the waveform is shaped so as to attenuate gradually.

  However, when such waveform shaping is performed, when a valid symbol is detected by removing the CP on the receiving side, a signal attenuation portion due to the waveform shaping is included in the symbol, and the waveform shaping of adjacent symbols is performed. There is a case where the signal attenuation part due to is mixed as intersymbol interference. For this reason, it can be said that the signal multiplexed (reception characteristics) such as EVM is relatively deteriorated in the signal multiplexed in the vicinity of the symbol boundary as compared with the signal multiplexed in the other part.

  In a wireless communication system, the transmission power of a transmission station may change due to transmission power control or the like. At that time, for example, an ideal power change as shown by a dotted line in FIG. 22 is a gentle power change as shown by a solid line in FIG. Quality (for example, EVM) is also relatively deteriorated as compared with signals multiplexed at other timings.

  However, the above-described prior art does not multiplex transmission symbols in consideration of the characteristic that the signal quality near the symbol boundary or near the power change point is likely to deteriorate compared to other portions. For example, in Non-Patent Document 2, an ACK / NACK signal or CQI signal or CQI signal is multiplexed at a position that is closest (adjacent) in time to an RS used for propagation path training. It just tries to improve the reception characteristics of the signal.

One of the objects of the present invention is to take into account the characteristic that the signal quality in the vicinity of the symbol boundary and the power change point is likely to be deteriorated as compared with other portions, and the first ACK / NACK signal, CQI signal, etc. It is to define a control signal multiplexing method as an example of the signal sequence of each channel and improve the reception characteristics of the control signal.
In addition, the present invention is not limited to the above-described object, and is an operational effect derived from each configuration shown in the best mode for carrying out the invention described later, and has an operational effect that cannot be obtained by conventional techniques. Can be positioned as one of the purposes.

  (1) As a first proposal, for example, a time multiplexing processing unit that time-multiplexes signal sequences of a plurality of channels including the first channel and the second channel, and the transmission power of the time multiplexed signal changes in the time domain. And at least part of the signal sequence of the second channel having a code length longer than that of the signal sequence of the first channel, between the timing to transmit and the transmission timing of the signal sequence of the first channel, The code length is longer than the first signal sequence of the first channel between the first signal sequence of the first channel and at least part of the signal sequence of the second channel. A transmission station comprising a control unit that controls the time multiplexing processing unit so that the second signal sequence of the first channel having a shorter code length than the signal sequence of the second channel is interposed be able to.

  (2) As a second proposal, for example, in the time domain, between the timing when the transmission power of the time multiplexed signal changes and the transmission timing of the signal sequence of the first channel, the first channel A signal in which signal sequences of a plurality of channels including the first channel and the second channel are time-multiplexed so that at least a part of the signal sequence of the second channel having a code length longer than that of the signal sequence is interposed. A receiving unit that receives the signal, a separation unit that separates the signal sequence of the first channel and the signal sequence of the second channel from the received signal, and a demodulator of the signal sequence of the first channel It is possible to use a receiving station that includes a demodulating unit that performs decoding, and a decoding unit that performs error correction decoding on the demodulated signal sequence of the first channel.

  (3) Further, as a third proposal, for example, in the time domain, between the timing when the transmission power of the time multiplexed signal changes and the transmission timing of the first signal sequence of the first channel, the first At least part of the signal sequence of the second channel having a longer code length than the first signal sequence of the first channel is interposed, and the first signal sequence of the first channel and the signal of the second channel The first channel of the first channel having a code length longer than that of the first signal sequence of the first channel and a code length shorter than that of the signal sequence of the second channel. A reception unit that receives a time-multiplexed signal sequence of a plurality of channels including the first channel and the second channel so that two signal sequences are interposed; The first of one channel A separation unit that separates the signal sequence and the second signal sequence from the signal sequence of the second channel, and a demodulation unit that demodulates the first signal sequence and the second signal sequence of the first channel; A receiving station including a decoding unit that performs error correction decoding on the demodulated first signal sequence and second signal sequence of the first channel can be used.

  It becomes possible to improve the reception quality at the receiving station of the signal sequence of the first channel (for example, the signal sequence of the control channel).

It is a figure which shows the example of allocation of the radio | wireless resource in a system band. It is a block diagram which shows the structural example of the transmitting station (UE) which concerns on 1st Example. It is a schematic diagram explaining an example of the channel multiplexing process in the channel multiplexing part of the transmitting station shown in FIG. It is a schematic diagram explaining an example of the channel multiplexing process in the transmitting station shown in FIG. It is a schematic diagram explaining an example of CP insertion processing in the transmitting station shown in FIG. It is a schematic diagram explaining an example of the window function process in the transmitting station shown in FIG. It is a block diagram which shows the structural example of the receiving station (BS) which concerns on 1st Example. It is a schematic diagram explaining an example of the effective symbol detection process in the receiving station shown in FIG. It is a figure which shows an example of the simulation result of EVM. It is a block diagram which shows the structural example of the transmitting station (UE) which concerns on 2nd Example. 11 is a flowchart for explaining an example of channel multiplexing processing (algorithm) in the transmission station shown in FIG. It is a schematic diagram explaining the channel multiplexing process by the algorithm shown in FIG. It is a schematic diagram explaining the other example of the channel multiplexing process in the transmitting station shown in FIG. It is a block diagram which shows the structural example of the transmitting station (UE) which concerns on 3rd Example. It is a schematic diagram explaining an example of the channel multiplexing process in the transmitting station shown in FIG. It is a figure which shows an example of the offset symbol number determination (selection) data used for the channel multiplexing process in the transmitting station shown in FIG. It is a block diagram which shows the structural example of the transmitting station (UE) which concerns on 4th Example. It is a block diagram which shows the modification of the transmitting station shown in FIG. FIG. 19 is a schematic diagram illustrating an example of channel multiplexing processing at the transmitting station illustrated in FIG. 17 or FIG. 18. FIG. 19 is a schematic diagram illustrating another example of channel multiplexing processing at the transmission station illustrated in FIG. 17 or 18. FIG. 19 is a schematic diagram illustrating another example of channel multiplexing processing at the transmission station illustrated in FIG. 17 or 18. It is a schematic diagram which shows an example of the electric power change accompanying the transmission power control in a transmission station.

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not clearly shown in the embodiment described below. That is, modifications such as combining the embodiments can be performed.
[1] Outline Description As described above, in the wireless communication system using CP (GI), in the time domain, in the vicinity of a symbol boundary or a transmission power change point (timing) as a signal unit to which a CP is added. There is a characteristic that the signal quality at is relatively easy to deteriorate as compared with other parts.

Therefore, in the example shown below, a control signal such as an ACK / NACK signal or a CQI signal is timed at a symbol time separated (offset) by one symbol time or more from such a symbol boundary or transmission power change point in the transmitting station. Multiplexed and transmitted to the receiving station.
At that time, the symbol time intervening between the symbol boundary or the transmission power change point and the control signal is generally part or all of the data signal having a longer code length and higher error resilience (error correction capability) than the control signal. Is time-multiplexed, it is also possible to suppress the influence of the characteristics on the (error correction) decoding characteristics at the receiving station.

In other words, it is preferable that at least a part of the data signal is preferentially time-multiplexed over the control signal for a time interval in which the signal power changes due to transmission processing at the transmitting station. .
The control signal is an example of a control channel signal sequence and is a first channel signal (symbol) sequence, and the data signal is a data channel signal (symbol) sequence and is a second channel signal. It is an example of a series.

In the following, an SC-FDMA scheme is taken as an example of a radio transmission scheme using CP. Further, as described above, for the sake of convenience, the SC-FDMA symbol is referred to as a block in order to distinguish the signal unit (SC-FDMA symbol) obtained by adding CP to the effective symbol and the signal unit constituting the SC-FDMA symbol. The element signal constituting this is called a symbol.
In the SC-FDMA scheme, for example, as shown in FIG. 1, frequency resources (system frequency resources) in a system band in the same time (TTI: Transmission Time Interval) are shared by a plurality of transmitting stations (for example, UEs). It is possible to communicate with a receiving station (for example, BS or eNodeB). The system band means the amount of radio resources (frequency resources) that can be allocated to a transmitting station by a BS or eNodeB as an example of a receiving station.

  For example, in FIG. 1, three UEs # 1, # 2, and # 3 can share system frequency resources to communicate with the BS at the time of TTI # 1, and two UEs at the time of TTI # 2. UE # 1 and UE # 4 can share system frequency resources and communicate with the BS. Also, in the time of TTI # 3, one UE # 3 can occupy all system frequency resources and communicate with the BS, and in the time of TTI # 4, two UE # 3 and UE # 2 Can communicate with BS by sharing system frequency resources.

[2] First Embodiment FIG. 2 is a block diagram showing a configuration of a transmitting station according to the first embodiment, and FIG. 7 is a receiving station that communicates with the transmitting station 1 shown in FIG. 2 via a radio link. 3 is a block diagram showing a configuration of FIG. The transmitting station 1 may be a mobile station (UE) and the receiving station 3 may be a base station (BS). Conversely, the transmitting station 1 may be a BS and the receiving station 3 may be a UE. In the following description, it is assumed that the transmitting station 1 is a UE and the receiving station 3 is a BS.

(Transmission station 1)
As shown in FIG. 2, the transmitting station (UE) 1 of this example includes, for example, a data generation unit 11, an error correction coding unit 12, a data modulation unit 13, a control signal generation unit 14, a control signal modulation unit 15, a channel Multiplexer 16, DFT (Discrete Fourier Transformer) 17, reference signal generator 18, reference signal multiplexer 19, subcarrier mapping unit 20, IFFT (Inverse Fast Fourier Transformer) 21, CP inserter 22, window function processor 23, A wireless processing unit 24, a transmission antenna 25, a reception antenna 26, a reception processing unit 27, a window function processing control unit 28, and a channel multiplexing control unit 29 are provided.

The data generation unit 11 generates a data signal to be transmitted to the receiving station 3. The data signal includes various data other than control information, such as voice, characters, images, and moving images.
The error correction encoding unit 12 performs error correction encoding on the data signal generated by the data generation unit 11. An example of the error correction code is a turbo code.
The data modulation unit 13 modulates the bit sequence obtained by the error correction coding unit 12 with a predetermined modulation method. When applying a multilevel modulation method such as QPSK or 16QAM, the data modulation unit ( Modulation is performed on data signal symbols (hereinafter also referred to as data symbols) having an I component and an orthogonal component (Q component).

  The control signal generation unit 14 generates a control signal including an ACK / NACK signal and a CQI signal. The ACK signal is generated when the signal received from the receiving station 3 can be normally received (for example, no CRC error), and the NACK signal is generated when the signal is not normally received. The CQI signal is periodically determined and generated based on the reception quality of the signal received from the receiving station 3.

  The control signal modulation unit 15 modulates the control signal generated by the control signal generation unit 14 using a predetermined modulation method (which may be the same as or different from the modulation method for the data signal). When a multi-level modulation scheme such as 16QAM is applied, modulation is performed into control signal symbols having an in-phase component (I component) and a quadrature component (Q component). Note that the control signal may be error correction encoded by turbo encoding or the like, similar to the data signal.

The channel multiplexing unit 16 time-multiplexes the data signal symbol obtained by the data modulation unit 13 and the control signal symbol obtained by the control signal modulation unit 15 to generate N _DFT symbol sequences C (k). (0 ≦ k ≦ N _DFT −1).
However, in the channel multiplexing unit 16 of this example, for example, as shown in FIG. 3, the control signal symbols are arranged at positions (timing) separated (offset) by a predetermined number of symbols from the block boundary in the time domain. Multiplexing (hereinafter also referred to as offset multiplexing) is performed. This offset multiplexing is controlled (set) by the channel multiplexing control unit 29, for example.

(1) to (3) of FIG. 3 show how the control signal symbols are time-multiplexed at positions (timing) offset from the block boundary by 1 to 3 symbol times, respectively. In other words, the channel multiplexing unit 16 performs time multiplexing so that one or more symbols other than the control signal are interposed between the control signal and the block boundary.
At this time, since signal degradation is likely to occur near the block boundary, the signal (offset symbol) interposed between the control signal and the block boundary is less important than the control signal or has more error tolerance than the control signal. A part of or all of a high signal, for example, a signal (in this example, a data signal) that has a longer code length than the control signal and has a relatively high error correction capability and that has little influence on the reception characteristics after decoding. Is preferred.

Therefore, even in the same control signal, when there is high or low importance and code length is short or long, a signal with lower importance or a signal with a longer code length is time-multiplexed at a position (timing) closer to the block boundary. It is good to do so.
For example, when comparing an ACK / NACK signal and a CQI signal, the CQI signal is generally less important than the ACK / NACK signal and has a longer code length (the former is about 1 to 2 bits, the latter is 20 It is preferable that the CQI signal is time-multiplexed at a timing closer to the block boundary.

However, as shown in FIG. 3 and FIG. 4 to be described later, it is not excluded to time-multiplex the ACK / NACK signal at a timing closer to the block boundary.
The number of offset symbols is preferably determined in consideration of the length of the signal attenuation section (N _win ), the time width per symbol, and various parameters such as ACLR, SEM, and EVM required for the system. One example will be described later.

The offset multiplexing need not be performed in units of blocks, and may be limited to some blocks. For example, when the reference signal (RS) is periodically transmitted as in Non-Patent Document 2, the target block for offset multiplexing can be limited to a block adjacent to the block on which RS is multiplexed.
An example is shown in FIG. (2) in FIG. 4 multiplexes control signal symbols so that a data symbol of one symbol time is interposed between the block boundary and a block adjacent in time before the RS block. 3) multiplexes control signal symbols in a block adjacent in time after the RS block so that a data symbol of 1 symbol time is interposed between the block boundary and (1) in FIG. In the blocks not adjacent to the blocks, the control signal symbols are not multiplexed.

The number of offset symbols may be two or more, and the degree of deterioration of channel estimation accuracy used for compensation (equalization) of the control signal due to the control signal moving away from the RS in time with the offset multiplexing is also determined by the parameter. It is better to consider it as one.
That is, the channel multiplexing control unit 29 determines the amount of data signal intervening between the block boundary and the control signal, and the block boundary is a block on which the reference signal used for channel estimation at the receiving station is multiplexed. It can be determined depending on whether it is a boundary.

  Further, the number of offset symbols may be the same for each target block for offset multiplexing, or may be different for one or a plurality of target blocks. Further, the number of offset symbols may be notified from the transmitting station 1 to the receiving station 3 as one of the control signals in order to make the receiving station 3 recognize it, or the transmitting station 1 (channel multiplexing control unit) as a system specification in advance. 29) and the receiving station 3 (CP removing unit 33). In the latter case, notification from the transmitting station 1 to the receiving station 3 can be made unnecessary.

Now, then, DFT17 is a multiplexed signal obtained by the channel multiplexer 16, as shown in the following formula (1), N _DFT symbols sequence C (k) units N _DFT point DFT (Discrete (Fourier Transform) processing is performed to convert it into _NDFT frequency domain signals C (n).

リファレンス信号（ＲＳ）生成部１８は、受信局３が送信局１との間の伝搬路トレーニング（チャネル推定）、伝搬路補償に用いる前記ＲＳを生成する。
リファレンス信号多重部１９は、ＤＦＴ１７の出力とＲＳ生成部１８が生成したＲＳとを選択的に出力することにより、データシンボルと制御信号シンボルとが時間多重されたブロックと、ＲＳとのブロック間多重を行なう。

The reference signal (RS) generation unit 18 generates the RS used for propagation path training (channel estimation) and propagation path compensation between the reception station 3 and the transmission station 1.
The reference signal multiplexing unit 19 selectively outputs the output of the DFT 17 and the RS generated by the RS generation unit 18, so that the block in which the data symbol and the control signal symbol are time-multiplexed and the RS between the blocks are multiplexed. To do.

The subcarrier mapping unit 20 maps the inter-block multiplexed signal to the assigned subcarrier component. Mapping methods include local mapping for mapping to N _DFT consecutive subcarriers and distributed mapping for periodically inserting 0 signals between transmission signals in order to maintain single carrier characteristics. A 0 signal is mapped to subcarrier components that are not allocated. As a result, _NDFT frequency domain signals C (n) become N _FFT frequency domain signals C ′ (n).

IFFT21, said the N _FFT frequency-domain signals C '(n), as shown in the following formula (2), by IFFT (Inverse Fast Fourier Transform) processing of N _FFT points, time of N _FFT samples Convert to area signal s (k).

ＣＰ挿入部２２は、下記の式（３）に示すように、前記時間領域信号（有効シンボル）s(k)の末尾Ｎ_CPサンプルを当該時間領域信号s(k)の先頭に付加して、Ｎ_FFT＋Ｎ_CPサンプルの信号ブロックs_block(t)を生成する（図５参照）。ただし、０≦ｔ≦Ｎ_CP＋Ｎ_FFT−１である。

The CP insertion unit 22 adds the last N _CP samples of the time domain signal (effective symbol) s (k) to the beginning of the time domain signal s (k) as shown in the following equation (3), A signal block s _block (t) of N _FFT + N _CP samples is generated (see FIG. 5). However, 0 ≦ t ≦ N _CP + N _FFT −1.

窓関数処理部２３は、下記の式（４）〜（６）及び図６の（１）及び（２）に示すように、ブロック内で信号が連続するようにブロックの先頭と末尾にそれぞれN_win/2サンプルの信号をコピーする。ここで、N_winは、システム帯域、割当送信帯域幅、割当送信帯域に応じて、窓関数処理制御部２８により決定される。窓関数が乗算される区間（信号減衰処理が施される区間）であるN_winを長くするほど、ＥＶＭ劣化も大きくなる傾向にある。

As shown in the following formulas (4) to (6) and (1) and (2) in FIG. 6, the window function processing unit 23 sets N at the beginning and the end of the block so that the signals are continuous in the block. Copy the signal of _win / 2 sample. Here, N _win is determined by the window function processing control unit 28 according to the system bandwidth, the assigned transmission bandwidth, and the assigned transmission bandwidth. EVM degradation tends to increase as N _win which is a section multiplied by the window function (section where signal attenuation processing is performed) is increased.

なお、前記の割当送信帯域幅とは、受信局３から送信局１に対して当該送信局１が送信に用いることのできる周波数リソースとして割り当てられたリソース量を意味し、例えば、リソースブロック（ＲＢ）と呼ばれる単位で割り当てが可能である。ここで、１ＲＢは、１サブキャリア帯域幅を有し、受信局３が送信を許可する送信局１に割り当てる周波数リソース（送信帯域）を選択（スケジューリング）する際の基本単位となり得る単位である。

The allocated transmission bandwidth means a resource amount allocated from the receiving station 3 to the transmitting station 1 as a frequency resource that the transmitting station 1 can use for transmission. For example, a resource block (RB ) Can be assigned in units called. Here, 1 RB is a unit that has one subcarrier bandwidth and can be a basic unit when selecting (scheduling) a frequency resource (transmission band) to be allocated to the transmission station 1 that the reception station 3 permits transmission.

The allocated transmission band indicates the occupied position in the system band of the frequency resource allocated from the receiving station 3 to the transmitting station 1, for example, the allocated transmission bandwidth as the offset value in RB units or the like. The arrangement (start) position of is indicated.
Next, as shown in the following formula (7) and (2) and (3) in FIG. 6, the window function processing unit 23 causes the signal to attenuate gradually at both ends of the block (N _win time interval). Is multiplied by the window function w (t).

窓関数w(t)の一例として、raised cosine波形を用いる場合は、下記の式（８）で表さ
れる。

As an example of the window function w (t), when a raised cosine waveform is used, it is expressed by the following equation (8).

次に、窓関数処理部２３は、下記の式（９），（１０）及び図６の（４）に示すごとく、平均電力が一定になるように信号減衰区間を隣接ブロック間で加算する。

Next, as shown in the following formulas (9) and (10) and (4) in FIG. 6, the window function processing unit 23 adds signal attenuation sections between adjacent blocks so that the average power becomes constant.

なお、上記窓関数処理は、信号帯域外への漏洩電力を抑圧する手段の一つであり、他には、帯域制限フィルタを用いて同等の信号減衰処理を行なう手段等も適用可能である。
無線処理部２４は、窓関数処理部２３の出力を、ＤＡ変換、無線周波数へ周波数変換（アップコンバージョン）等して送信アンテナ２５から受信局３へ送信する。

The window function processing is one of means for suppressing the leakage power outside the signal band, and other means such as means for performing equivalent signal attenuation processing using a band limiting filter can be applied.
The radio processing unit 24 transmits the output of the window function processing unit 23 from the transmitting antenna 25 to the receiving station 3 by performing DA conversion, frequency conversion (up-conversion) to a radio frequency, or the like.

  The reception processing unit 27 performs a reception process on the signal received by the reception antenna 26 from the reception station 3. The reception processing includes low noise amplification, frequency conversion (down conversion) to baseband frequency, AD conversion, demodulation, decoding, and the like. The received signal includes a common control channel signal and an individual control channel signal, the common control channel signal includes information on the system band, and the dedicated control channel signal includes an allocated transmission band and an allocated transmission. Contains information about bandwidth.

The window function processing control unit 28 determines the window function processing (N _win of N _{win) in} the window function processing unit 23 according to information such as the system band, the allocated transmission bandwidth, the allocated transmission band, etc. obtained by the reception processing unit 27. Control).
(Receiving station 3)
On the other hand, as illustrated in FIG. 7, the reception station 3 includes, for example, a reception antenna 31, a radio processing unit 32, a CP removal unit 33, an FFT (Fast Fourier Transformer) 34, a subcarrier demapping unit 35, and a reference signal separation unit 36. , Channel estimation unit 37, frequency domain equalization processing unit 38, IDFT (Inverse Discrete Fourier Transformer) 39, data / control signal separation unit 40, control signal demodulation unit 41, data demodulation unit 42, error correction decoding unit 43, control channel A processing unit 51, a transmission processing unit 52, and a transmission antenna 53 are provided.

The wireless processing unit 32 performs low-noise amplification, frequency conversion (down conversion) from a radio frequency to a baseband frequency, AD conversion, and the like for a signal received by the receiving antenna 31.
The CP removing unit 33 removes the CP from the received signal processed by the wireless processing unit 32 and extracts (cuts out) an effective symbol portion of the block. This is illustrated in FIG. That is, the CP removal unit 32 cuts out an effective symbol portion at the FFT timing of the first path (here, path # 1) having the largest received power. For path # 2, the signal is cut out in a form that includes a part of CP. However, since CP is a cyclic copy of valid symbols, only valid symbols (N _FFT samples) are accurate as a result. It is possible to cut out.

  However, for the delayed wave path # 3 whose delay time exceeds the CP length, the signal of the adjacent (1-1) block is mixed in the effective symbol as inter-block interference. Also for the path # 1, the effective symbol may include a portion where the signal is attenuated by the window function processing in the transmitting station 1. In addition, in the effective symbol of the adjacent (l + 1) th block, the portion subjected to the window function processing of the (l + 1) th block of path # 2 can be mixed as inter-block interference.

These events may cause EVM degradation of symbols arranged at the beginning and / or end of a block in DFT-S OFDM. FIG. 9 shows an example of an EVM simulation result for each symbol when N _DFT = 1200, N _FFT = 2048, and N _win = 12. As shown in FIG. 9, it can be seen that the deterioration of the symbol near the block boundary (start and end) is remarkable.

Therefore, if a control signal such as an ACK / NACK signal or a CQI signal having a code length shorter than that of the data signal is time-multiplexed on a symbol adjacent to the block boundary, it is more affected by EVM degradation than other symbols. It is easy and the reception characteristic tends to deteriorate.
However, in this example, in the transmission station 1, the control signal is time-multiplexed so as to be separated from the block boundary by one or more symbols via at least a part of the data symbols, and thus is less susceptible to EVM degradation and has a reception characteristic. It is possible to suppress deterioration. In this case, signals other than the control signal multiplexed adjacent to the block boundary are easily affected by EVM degradation. However, if at least part of the signal having a code length longer than that of the control signal is correct, error correction decoding can be used to correct the signal. The possibility of decoding is higher than in the case of the control signal.

Further, since it is not necessary to intentionally shift (accelerate) the cutout position in the time direction in the CP removal unit 33, the substantial CP length is shortened and inter-block interference due to multipath exceeding the CP long time. It is also possible to avoid increasing.
Next, the FFT 34 converts the received signal (effective symbol) from which the CP has been removed by the CP removing unit 33 as described above into a frequency domain signal by FFT processing of N _FFT points, and the subcarrier demapping unit 35. To enter.

The subcarrier demapping unit 35 extracts a subcarrier component of the allocated transmission band from the frequency domain signal obtained by the FFT process, and inputs the subcarrier component to the reference signal separation unit 36.
The reference signal separation unit 36 separates the RS and other channel signals from the received signal of the subcarrier component input from the subcarrier demapping unit 35, and the RS signals the other channel signals to the channel estimation unit. Are respectively input to the frequency domain equalization processing unit 38.

The channel estimation unit 37 estimates a reception channel state with the transmission station 1 using the RS.
The frequency domain equalization processing unit 38 equalizes (compensates) the received signals of channels other than the separated RS in the frequency domain using the estimation result (channel estimation value) by the channel estimation unit 37 and outputs the equalized signal to the IDFT 39. To do.

IDFT39 the received signal the equalized by inverse discrete Fourier transform of the N _DFT points (IDFT) processing, converted to N _DFT time-domain signal (received symbol sequence), the data / control signal separator 40 input.
The data / control signal separator 40 separates the time-multiplexed received data symbols and the received control signal symbols from the N _DFT time-domain received symbol sequences, and the received data symbols are sent to the data demodulator 42. The reception control signal symbols are input to the control signal demodulation unit 41, respectively.

The control signal demodulator 41 demodulates the input reception control signal symbol by a demodulation method corresponding to the modulation method at the transmission station 1, and the data demodulation unit 42 transmits the input reception data symbol at the transmission station 1. Demodulate using a demodulation method corresponding to the modulation method.
The error correction decoding unit 43 performs error correction decoding on the demodulated received data symbol by a decoding method corresponding to the error correction encoding method in the transmitting station 1.

When the control signal symbol is subjected to error correction coding at the transmitting station 1, the control signal symbol is also subjected to error correction decoding by a decoding method corresponding to the error correction coding method.
The control channel processing unit 51 generates a common control channel signal including information related to the system band and a dedicated control channel signal including information related to the transmission allocation bandwidth, the transmission allocation band, and the like, and transmits the signals to the transmission processing unit 52.

The transmission processing unit 52 transmits the signal of each control channel from the transmission antenna 53 to the transmission station 1 by DA conversion, frequency conversion to radio frequency (up-conversion), amplification to a predetermined transmission power, and the like. To do.
As described above, according to the present example, when the data signal and the control signal are time-multiplexed in the transmitting station 1, an example of a signal other than the control signal is provided between the control signal and the block boundary in the time domain. Since the control signal is multiplexed with time offset from the block boundary so that at least a part of the data signal is interposed, a window function, a band limiting filter, or the like is used in the process of transmission processing at the transmission station 1 The control signal can be kept away from the block boundary (signal attenuation section) on which the waveform shaping process (signal attenuation process) is performed.

Therefore, it is possible to time-multiplex the control signal while avoiding symbols with degraded signal quality near the block boundary, and to suppress degradation of signal quality such as EVM for the control signal due to the signal attenuation process. Thus, the reception quality of the control signal at the receiving station 3 can be improved.
As a preferred embodiment, the data signal (symbol) interposed between the control signal and the block boundary is an element signal of a data signal having a code length longer than that of the control signal. Even if it is likely to deteriorate, the influence on the decoding characteristics at the receiving station 3 is small.

[3] Second Embodiment FIG. 10 is a block diagram illustrating a configuration of a transmitting station (UE) according to a second embodiment. The transmitting station 1 shown in FIG. 10 is different from the transmitting station 1 shown in FIG. 2 in that it further includes a channel multiplexing control unit 29a. In FIG. 10, components given the same reference numerals as those described above have the same or similar functions as those described above unless otherwise specified below. Further, the receiving station 3 may be the same as or similar to the configuration described above.

  Here, the channel multiplexing control unit 29a of this example performs channel multiplexing based on the code lengths of the data signals and control signals (CQI signals, ACK / NACK signals, etc.) modulated by the modulation units 13 and 15, respectively. The time multiplexing process by the unit 16 is controlled. More specifically, for example, the time multiplexing process is controlled so that a signal having a longer code length is multiplexed at a timing closer to the block boundary than other signals.

This is because, as described above, a signal with a long code length can be subjected to error correction decoding based on the remaining symbols even if it includes symbols that are adjacent to the block boundary and whose signal quality is likely to deteriorate due to signal attenuation processing. This is because the influence on the reception characteristics after decoding at the receiving station 3 is small even though the probability of
FIG. 11 shows an example of a channel multiplexing algorithm by the channel multiplexing control unit 29a.

First, the channel multiplexing control unit 29a rearranges the signals of the N _channel channels (data channel and control channel) in the order of longer code length (processing 1010).
Then, the channel multiplexing control unit 29a sets the i-th channel signal (symbol sequence) to si (k) and its code length to Li, from i = 0 (that is, from the symbol sequence of the channel with a long code length), The 0th (first) symbol, _NDFT- 1st (end) symbol, 1st (next to the first symbol), _NDFT -2nd (1 symbol block after the end) of an N _DFT symbol length block The channel multiplexing unit 16 is controlled so that symbols are alternately multiplexed from both ends of the block toward the center, such as symbols at positions close to the center (processing 1020 to processing 1080).

Note that the process 1050 is a process for determining which side of the block center is multiplexed with the symbol at the head or end of the block. Here, if the remainder obtained by dividing t by 2 is 0 (if Yes) ) If the remainder of the block is other than 0 (if it is No), this is a process for determining that the data is multiplexed on the end of the block.
Further, the process 1060 is a process for determining the symbol position when multiplexing to the symbol at the head of the block (Yes in process 1050), and the process 1070 is the case of multiplexing to the symbol at the end of the block (No in process 1050) ) Represents the process of determining the symbol position. However, “floor (x)” represents a function that returns a maximum integer less than or equal to x for an input argument (real number) x.

The channel multiplexing control unit 29a performs the above determination and determination of the symbol position until all symbols of the N _channel channels are multiplexed [repetition (loop) conditions in processing 1030 and processing 1040 (i <N _channel and k Repeat until <Li) is no longer satisfied].
An example of channel multiplexing by the above algorithm is shown in FIG.

In FIG. 12, as an example, N _DFT = 18 (symbol), data signal code length L _data = 10 (symbol), CQI signal code length L _CQI = 6 (symbol), ACK / NACK signal code length L _ACK Assuming that _{/ NACK} = 2 (symbol), an example is shown in which multiplexing is performed with priority from a channel signal having a long code length from the head and the tail of the block toward the center.
In this example, the data signal having the longest code length is time-multiplexed in the order and symbol position (timing) indicated by d (0) to d (9), and the CQI signal having the next long code length is c (0 ) To c (5) are time-multiplexed in the order and symbol positions, and the shortest ACK / NACK signal is time-multiplexed in the order and symbol positions indicated by a (0) and a (1). .

That is, the channel multiplexing control unit 29a can control the time multiplexing processing of the channel multiplexing unit 16 so that the control signal and the data signal are located in the direction away from the block boundary in order from the longest individual code length. It is.
According to this channel multiplexing method, a channel signal having a shorter code length is more likely to be time-multiplexed to the block center side, which is less susceptible to waveform shaping (signal attenuation) processing by the window function processing unit 23 and multipath. Therefore, control signals (CQI signal and ACK / NACK signal) having a code length shorter than that of the data signal are likely to be time-multiplexed at a symbol position closer to the block center than the data signal. It is possible to suppress deterioration of characteristics.

In addition, since a signal having a longer code length is more likely to be time-multiplexed at a symbol position closer to the block boundary, the influence on the reception characteristics of the signal after decoding at the receiving station 3 is small.
Note that the channel multiplexing method of this example does not have to be performed in units of blocks, and may be limited to some blocks. For example, when the reference signal (RS) is periodically transmitted as in Non-Patent Document 2, the target block for offset multiplexing can be limited to a block adjacent to the block on which RS is multiplexed.

In addition, when a block adjacent to the RS block is an application target block of the channel multiplexing method of this example, a control signal is preferentially arranged after arranging a predetermined number of data signals on the boundary side with the RS block. It is also possible to do.
An example is shown in FIG. In FIG. 13, as shown in (2) and (3), a control signal (CQI signal, ACK / NACK signal) is prioritized after arranging one data signal symbol with respect to the boundary with the RS block. The manner of arrangement is illustrated. However, N _DFT = 18 (symbol), data signal code length L _data = 14 (symbol), CQI signal code length L _CQI = 3 (symbol), ACK / NACK signal code length L _{ACK / NACK} = 1 ( Symbol).

  For example, in the example shown in (2) of FIG. 13, the channel multiplexing control unit 29a receives the data signal symbol d (0) in the first symbol time of the block head in a block adjacent in time to the RS block. After the data signal symbol d (1) is arranged at one symbol time at the end of the block, CQI signal symbols c (0), c (1), c (2), ACK / NACK signal symbol a (0) is sequentially arranged toward the center of the block, and the remaining 12 symbols d (2) to d (13) of the data signal symbols are alternately arranged in order from the head and end of the block with respect to the remaining 12 symbol times. Thus, the time multiplexing process in the channel multiplexing unit 16 is controlled.

  On the other hand, in the example shown in (3) of FIG. 13, the channel multiplexing control unit 29a arranges the data signal symbol d (0) in one symbol time at the head of the block in a block that is temporally adjacent to the RS block. After that, CQI signal symbols c (0), c (1), c (2), ACK / NACK signal symbol a (0) are sequentially arranged toward the block center, and for the remaining 12 symbol times, The time multiplexing process in the channel multiplexing unit 16 is controlled so that the remaining 12 symbols d (2) to d (13) of the data signal symbols are alternately arranged in order from the head and end of the block.

For blocks that are not adjacent to the RS block, as shown in (1) of FIG. 13, the channel multiplexing control unit 29a determines that the 18 data signal symbols d (0) to d (17) are in order from the beginning and end of the block. The time multiplexing processing in the channel multiplexing unit 16 is controlled so as to be alternately arranged.
That is, when the block boundary is a boundary with an RS block on which a reference signal used for propagation path estimation is received at the receiving station 3, each channel multiplex control unit 29a receives each signal of the data symbol from the block boundary. It is possible to control the time multiplexing process of the channel multiplexing unit 16 so that the control signal symbols are preferentially time-multiplexed in the middle of the time-multiplexing process so as to be sequentially positioned in the away directions.

  In the channel multiplexing method illustrated in FIG. 12, a signal of a channel having a longer code length is preferentially multiplexed as the symbol time is closer to the block boundary. , CQI signal) is likely to be located at the center of the block and is likely to be separated from the RS in time, and as a result, the accuracy of the channel estimation value used for control signal compensation at the receiving station 3 may be degraded.

On the other hand, according to the channel multiplexing method illustrated in FIG. 13, it is possible to avoid that the control signal is too far in time from the RS. Therefore, the receiving station 3 is closer in time to the control signal. It is possible to perform channel compensation of the control signal using a more accurate channel estimation value obtained based on the RS.
In FIG. 13, one data signal symbol is arranged between the boundary with the RS block and the control signal, but a data signal of two symbols or more can be preferentially arranged. is there. The number of offset symbols is also preferably determined in consideration of the relationship with parameters such as the ACLR, SEM, EVM, etc. of the system, with the degree of degradation of channel estimation accuracy caused by moving away from the RS in time as one of the parameters. .

[4] Third Embodiment FIG. 14 is a block diagram illustrating a configuration of a transmitting station according to a third embodiment. The transmitting station 1 shown in FIG. 14 is different from the transmitting station 1 shown in FIG. 2 in that it further includes a channel multiplexing control unit 29b. In FIG. 14, components given the same reference numerals as those described above have the same or similar functions as those described above unless otherwise specified. Further, the receiving station 3 may be the same as or similar to the configuration described above.

  Here, the channel multiplexing control unit 29b of the present example is information received from the reception processing unit 27 (notified or assigned from the receiving station 3), information on any of the system bandwidth, the assigned transmission bandwidth, and the assigned transmission bandwidth, Alternatively, the number of symbols for offsetting the time multiplexing position (timing) of the control signal from the block boundary is determined based on the combination of the two or more information, and the time multiplexing processing in the channel multiplexing unit 16 is controlled according to the number of offset symbols. To do.

For example, when the allocated transmission bandwidth is narrow and the allocated transmission band (start position) is at the end of the system band, it is a strict condition from the viewpoint of ACLR and SEM. There is a possibility that a more gradual window function process (signal attenuation process) with a long time window N _win may be performed than when the signal is assigned near the center of the system band.
An example of this is shown in FIG. Here, an example is shown in which the system bandwidth is 4 resource blocks (RB), the assigned transmission bandwidth is 1 RB, and the start position of the assigned transmission band is an end on the low frequency side of the system band.

In such a case, it is preferable to increase the number of offset symbols compared to the case where the allocated transmission band is allocated near the center of the system band as shown in (2) of FIG. For example, in the example of (1) in FIG. 15, the number of offset symbols = 2.
When the allocated transmission bandwidth is wide, for example, as illustrated in FIG. 15 (3), when the transmission band is allocated over the entire system band (4RB), the time interval per symbol is short. Become. Therefore, when the amount of inter-block interference due to time window processing and inter-block interference due to multipath in the transmitting station 1 (window function processing unit 23) is the same, compared with the case where the allocated transmission bandwidth is small, the block near the block boundary. More symbols are affected.

In such a case as well, it is preferable to increase the number of offset symbols compared to the case where the allocated transmission band is allocated near the center of the system band as shown in (2) of FIG. For example, in the example of (3) in FIG. 15, the number of offset symbols is 6.
FIG. 16 shows an example of selection (determination) criteria for the number of offset symbols according to the assigned transmission band (start position) and the assigned transmission bandwidth when N _FFT = 8. In FIG. 16, transmission band (start position) = 0 to 7 represents, for example, an offset position in units of RBs from the low frequency side end of the system band, and transmission bandwidth = 1 to 8 represents, for example, the number of RBs. .

The channel multiplex control unit 29b retains data serving as a reference for determining (selecting) the number of offset symbols in a memory or the like (not shown) in a table format or the like, and is obtained by the reception processing unit 27 based on the data. Then, the number of offset symbols corresponding to the allocated transmission band (start position) and the allocated transmission bandwidth (the number of RBs) is determined (selected).
For example, in the example shown in FIG. 16, if a transmission bandwidth of 1 RB is allocated at the end of the system band (the start position of the allocated transmission band is 0 or 7), the number of offset symbols is 3. That is, a larger number of offset symbols is selected than when the same transmission bandwidth of 1 RB is assigned to other than the end of the system band.

In this way, the channel multiplexing control unit 29b determines the amount of data signal intervening between the block boundary and the control signal as a frequency band (system frequency band) that can be used in the system and the allocated frequency allocated from the receiving station 3. It is possible to determine the bandwidth according to one or a combination of two or more of the allocated frequency bands allocated from the receiving station 3.
Note that the data (table) shown in FIG. 16 may be notified as one of the control signals from the transmitting station 1 to the receiving station 3 in order to share with the receiving station 3, or as system specifications in advance. You may set to the transmission station 1 and the receiving station 3 (for example, CP removal part 33). In the latter case, notification from the transmitting station 1 to the receiving station 3 can be made unnecessary.

Further, when a plurality of system bands are set, the data (table) shown in FIG. 16 is provided for each system band, for example, to the channel multiplexing control unit 29b, so that the above-described allocated transmission band ( It is possible to select the number of offset symbols according to the start position) and the allocated transmission bandwidth (number of RBs).
[5] Fourth Embodiment As described above, in the process of transmission processing at the transmission station 1, not only signal quality deterioration in the vicinity of the block boundary accompanying the signal attenuation processing, but also a change point (timing) of transmission power. Even in the vicinity, the signal quality is relatively deteriorated as compared with other portions.

In this example, therefore, the transmission power change point is treated as equivalent to the block boundary in the above-described embodiment, and the time multiplexing is performed by offsetting the control signal by a predetermined symbol time from the transmission power change point. .
FIG. 17 shows a configuration example of the transmission station 1 of this example. The transmission station 1 shown in FIG. 17 includes a channel multiplexing control unit 29c and a transmission power control unit 30a in addition to the transmission station 1 described above shown in FIG. The gain factor multipliers 30-1 and 30 are connected to the signal lines from the data modulator 13 to the channel multiplexer 16, the control signal modulator 15 to the channel multiplexer 16, and the reference signal generator 18 to the reference signal multiplexer 19, respectively. The difference is that −2 and 30-3 are provided. In FIG. 17, components having the same reference numerals as those described above have the same or similar functions as those described above unless otherwise specified. Further, the receiving station 3 may be the same as or similar to the configuration described above.

  Here, the transmission power control unit 30a determines the transmission power based on the transmission power control information received by the reception processing unit 27 from the receiving station 3, and determines the gain factor corresponding to the transmission power as the gain factor multiplication unit. In 30-1, 30-2, and 30-3, the signal power of each signal is controlled as digital signal processing by multiplying the data signal, the control signal, and the reference signal, respectively. The gain factor may be a value common to the multipliers 30-1, 30-2, and 30-3, or may be an individual value.

The channel multiplexing control unit 29c receives notification of information on the power control timing from the transmission power control unit 30a, and based on the power control timing information, the symbol time in which the control signal is offset by one symbol time or more from the timing at which the power change occurs The time multiplexing processing by the channel multiplexing unit 16 is controlled so as to be time multiplexed.
Note that transmission power control in the transmission station 1 may be performed by analog signal processing in the wireless processing unit 24. For example, when a power control (variable) width that cannot be realized by digital signal processing is required, it is preferable to perform control by analog signal processing. In such a case, for example, as shown in FIG. 18, a transmission power control unit 30b that controls transmission power (for example, a gain of a power amplifier (not shown)) in the wireless processing unit 24 may be provided instead.

FIG. 19 shows an example of the channel multiplexing processing of this example.
In other words, the channel multiplexing unit 16 of the present example, in the time domain under the control of the channel multiplexing control unit 29c, only a predetermined number of symbols from the transmission power control timing (power change point) by the transmission power control unit 30a (or 30b). Multiplexing is performed so that control signal symbols are arranged at distant (offset) positions (timing).

(1) to (3) in FIG. 19 show how the control signal symbols are time-multiplexed at positions (timing) offset from the power change point by 1 to 3 symbol times. However, the number of offset symbols is not limited to 1 to 3 symbols.
Also in this example, the number of offset symbols is desirably determined in consideration of the time width per symbol and various parameters such as ACLR, SEM, and EVM required for the system.

As described in the second embodiment (FIG. 12), the channel multiplexing control unit 29c controls the time multiplexing process by the channel multiplexing unit 16 based on the code lengths of the data signal and the control signal. Also good.
That is, for example, the channel multiplexing unit 16 may be controlled (set) so that a signal having a longer code length is multiplexed at a timing closer to the power change point than other signals. If it does so, the effect thru | or advantage similar to 2nd Example will also be acquired.

An example is shown in FIG. FIG. 20 shows a state in which the code length is assumed to be longer in the order of the data signal, the CQI signal, and the ACK / NACK signal, and a signal having a longer code length is time-multiplexed at a symbol time closer to the power change point.
That is, the channel multiplex control unit 29c is configured so that in the time domain, the control signal and the data signal are positioned in a direction away from the timing of the power change point in order from the one with the highest error tolerance of each signal. It is possible to control the time multiplex processing.

Note that the offset multiplexing for the power change point in this example may be performed together with the offset multiplexing for the block boundary described above.
In this case, the channel multiplexing control unit 29c performs channel multiplexing so that at least a part (one symbol or more) of the data signal is interposed between the control signal and the power change point and the block boundary in the time domain. The time multiplexing in the unit 16 is controlled.

An example of the channel multiplexing is shown in FIG. FIG. 21 shows a state in which an ACK / NACK signal having a code length shorter than that of the CQI signal is time-multiplexed via the data symbol and the CQI signal symbol so as to be away from both the power change point and the block boundary. Yes. However, it is not limited to the arrangement shown in FIG.
For example, when the block boundary is a boundary with the RS block, the control signal symbol is more transmitted through one or more data symbols so that the receiving station 3 can apply a highly accurate channel estimation result based on the RS block. It is also possible to control to be multiplexed at a symbol time close to the block.

[6] Appendix (Appendix 1)
A signal multiplexing method in a wireless communication system in which a signal sequence of a plurality of channels is time-multiplexed in predetermined block units at a transmitting station and transmitted to a receiving station,
The transmitting station is
In the time domain, at least part of the signal sequence of the second channel having higher error tolerance than the signal sequence of the first channel is interposed between the block boundary of the time multiplexed signal and the signal sequence of the first channel. To perform the time multiplexing,
A signal multiplexing method in a wireless communication system.

(Appendix 2)
2. The signal multiplexing method in the wireless communication system according to claim 1, wherein the signal sequence of the second channel with high error resilience is a signal sequence having a longer code length than the signal sequence of the first channel. .
(Appendix 3)
The signal in the wireless communication system according to appendix 1 or 2, wherein the first signal sequence is a signal sequence of a control channel and the second signal sequence is a signal sequence of a data channel. Multiple ways.

(Appendix 4)
The amount of the signal sequence of the second channel interposed between the block boundary and the signal sequence of the first channel is allocated from the system band, which is a frequency band usable in the radio communication system, from the receiving station. In any one of appendices 1 to 3, wherein the allocated frequency bandwidth is determined according to any one or a combination of two or more of the allocated frequency bandwidth allocated from the receiving station. A signal multiplexing method in the described wireless communication system.

(Appendix 5)
The amount of the signal sequence of the second channel interposed between the block boundary and the signal sequence of the first channel is such that the block boundary is multiplexed with a reference signal used for channel estimation at the receiving station. The signal multiplexing method in the wireless communication system according to any one of appendices 1 to 4, wherein the signal multiplexing method is determined depending on whether or not the boundary is a boundary with a block.

(Appendix 6)
The radio communication system according to claim 1, wherein the signal series of each channel is time-multiplexed so as to be located in a direction away from the block boundary in descending order of error tolerance of individual signals. Signal multiplexing method.
(Appendix 7)
When the block boundary is a boundary with a block on which a reference signal used for channel estimation at the receiving station is multiplexed, the individual signals of the signal sequence of the first channel are separated from the block boundary. 2. The signal multiplexing method in the wireless communication system according to appendix 1, wherein the signal sequence of the second channel is preferentially time-multiplexed during the time-multiplexing process so as to be positioned in order.

(Appendix 8)
A signal multiplexing method in a wireless communication system in which a signal sequence of a plurality of channels is time-multiplexed at a transmitting station and transmitted to a receiving station,
The transmitting station is
In the time domain, at least the second channel signal sequence having higher error tolerance than the first channel signal sequence between the timing at which the transmission power of the time multiplexed signal changes and the first channel signal sequence. The time multiplexing is performed so that a part is interposed,
A signal multiplexing method in a wireless communication system.

(Appendix 9)
9. The signal in the wireless communication system according to claim 8, wherein the signal series of each channel is time-multiplexed so as to be located in a direction away from the timing in descending order of error tolerance of individual signals. Multiple ways.
(Appendix 10)
A time multiplexing processing unit for time-multiplexing a signal sequence of a plurality of channels addressed to a receiving station in a predetermined block unit;
In the time domain, at least part of the signal sequence of the second channel having higher error tolerance than the signal sequence of the first channel is interposed between the block boundary of the time multiplexed signal and the signal sequence of the first channel. A control unit for controlling the time multiplexing processing unit;
A transmitting station characterized by comprising:

(Appendix 11)
The transmitting station according to appendix 10, wherein the signal sequence of the second channel with high error tolerance is a signal sequence having a longer code length than the signal sequence of the first channel.
(Appendix 12)
12. The transmitting station according to appendix 10 or 11, wherein the signal sequence of the first channel is a signal sequence of a control channel, and the second signal sequence is a signal sequence of a data channel.

(Appendix 13)
The controller is
The amount of the signal sequence of the second channel interposed between the block boundary and the signal sequence of the first channel is allocated from the receiving station, a system band that is a frequency band that can be used in the wireless communication system It is determined according to any one or a combination of two or more of the allocated frequency bandwidth allocated and the allocated frequency band allocated from the receiving station. Transmitter station.

(Appendix 14)
The controller is
The amount of the signal sequence of the second channel interposed between the block boundary and the signal sequence of the first channel is multiplexed with the reference signal used for channel estimation at the receiving station. 14. The transmission station according to any one of appendices 10 to 13, wherein the transmission station is determined according to whether or not the boundary is a boundary with a block.

(Appendix 15)
The controller is
11. The transmission station according to appendix 10, wherein the time multiplexing is controlled so that the signal series of each channel is positioned in a direction away from the block boundary in order from the one with the highest error tolerance of each signal.

(Appendix 16)
The controller is
When the block boundary is a boundary with a block on which a reference signal used for channel estimation at the receiving station is multiplexed, the individual signals of the signal sequence of the first channel are separated from the block boundary. 11. The time multiplexing is controlled so that the signal sequence of the second channel is preferentially time multiplexed in the course of time multiplexing so as to be positioned in order. Transmitting station.

(Appendix 17)
A time multiplexing processing unit that time-multiplexes signal sequences of a plurality of channels addressed to a receiving station;
In the time domain, at least the second channel signal sequence having higher error tolerance than the first channel signal sequence between the timing at which the transmission power of the time multiplexed signal changes and the first channel signal sequence. A control unit that controls the time multiplexing processing unit so that a part thereof is interposed;
A transmitting station characterized by comprising:

(Appendix 18)
The controller is
18. The transmission station according to appendix 17, wherein the time multiplexing is controlled so that the signal series of each channel is positioned in a direction away from the timing in order from the signal with high error tolerance of each signal.

1 Transmitting station (UE: User Equipment)
DESCRIPTION OF SYMBOLS 11 Data generation part 12 Error correction encoding part 13 Data modulation part 14 Control signal generation part 15 Control signal modulation part 16 Channel multiplexing part 17 DFT (Discrete Fourier Transformer)
DESCRIPTION OF SYMBOLS 18 Reference signal (RS) production | generation part 19 Reference signal multiplexing part 20 Subcarrier mapping part 21 IFFT (Inverse Fast Fourier Transformer)
22 CP Insertion Unit 23 Window Function Processing Unit 24 Radio Processing Unit 25 Transmitting Antenna 26 Reception Antenna 27 Reception Processing Unit 28 Window Function Processing Control Unit 29, 29a, 29b, 29c Channel Multiplexing Control Unit 30a, 30b Transmission Power Control Unit 3 Receiving Station (BS: Base Station)
31 receiving antenna 32 wireless processing unit 33 CP removing unit 34 FFT (Fast Fourier Transformer)
35 Subcarrier Demapping Unit 36 Reference Signal Separation Unit 37 Channel Estimation Unit 38 Frequency Domain Equalization Processing Unit 39 IDFT (Inverse Discrete Fourier Transformer)
40 Data / Control Signal Separation Unit 41 Control Signal Demodulation Unit 42 Data Demodulation Unit 43 Error Correction Decoding Unit

Claims (5)

A time multiplexing processing unit that time-multiplexes signal sequences of a plurality of channels including the first channel and the second channel;
In the time domain, between the timing at which the transmission power of the time-multiplexed signal changes and the transmission timing of the signal sequence of the first channel, the second code having a longer code length than the signal sequence of the first channel At least a part of the signal sequence of the channel is interposed, and the first channel of the first channel is between the first signal sequence of the first channel and at least a part of the signal sequence of the second channel. Controlling the time multiplexing processing unit so that the second signal sequence of the first channel having a code length longer than that of the first signal sequence and a code length shorter than that of the second channel is interposed. A control unit;
A transmitting station characterized by comprising:   The first signal sequence of the first channel is an ACK signal or a NACK signal, the second signal sequence of the first channel is a CQI signal, and the signal sequence of the second channel is data The transmitting station according to claim 1, wherein the transmitting station is a signal, the first channel is a control channel, and the second channel is a data channel.   The control unit, in the time domain, between the timing when the transmission power of the time multiplexed signal changes and the transmission timing of the first signal sequence of the first channel after the timing, The transmitting station according to claim 1, wherein the time multiplexing processing unit is controlled so that at least a part of a signal sequence of two channels is interposed. In the time domain, between the timing at which the transmission power of the time multiplexed signal changes and the transmission timing of the signal sequence of the first channel, the second channel having a longer code length than the signal sequence of the first channel. A receiving unit that receives a signal in which signal sequences of a plurality of channels including the first channel and the second channel are time-multiplexed so that at least a part of the signal sequence is interposed;
A separation unit that separates the signal sequence of the first channel and the signal sequence of the second channel from the received signal;
A demodulator that demodulates the signal sequence of the first channel;
A decoding unit that performs error correction decoding on the demodulated signal sequence of the first channel;
A receiving station characterized by comprising: In the time domain, between the timing at which the transmission power of the time-multiplexed signal changes and the transmission timing of the first signal sequence of the first channel, the code length is longer than that of the first signal sequence of the first channel. At least part of the signal sequence of the long second channel intervenes, and the first signal sequence of the first channel and at least part of the signal sequence of the second channel are The first signal sequence of the first channel having a longer code length than the first signal sequence of one channel and a shorter code length than the signal sequence of the second channel. A receiver that receives a time-multiplexed signal sequence of a plurality of channels including a second channel and the second channel;
A separation unit that separates the first signal sequence and the second signal sequence of the first channel and the signal sequence of the second channel from the received signal;
A demodulator that demodulates the first signal sequence and the second signal sequence of the first channel;
A decoding unit that performs error correction decoding on the demodulated first signal sequence and second signal sequence of the first channel;
A receiving station characterized by comprising:

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