JP5206496B2 - Wireless transmission device, wireless reception device, and transmission method - Google Patents

Description

  The present invention relates to communication between a radio base station apparatus accommodated in a network and a mobile radio terminal apparatus.

  In a mobile communication system such as a cellular phone, there are various parameters that define transmission / reception capabilities of terminals in order to support terminals for various purposes (see, for example, Non-Patent Document 1). The combination defines a terminal category (UE Category). The terminal capability (UE capability) that defines the terminal category includes a maximum information transmission rate, and is defined for transmission and reception. The base station transmits / receives signals to / from terminals in accordance with different transmission capabilities and reception capabilities of a plurality of terminals. Non-Patent Document 1 suggests that the base station must be able to connect terminals of different categories at the same time.

  Recently, an LTE-Advanced system using a wide band including a system band that is a receivable bandwidth of a Rel-8 LTE terminal has been studied. In order to enable a Rel-8 LTE terminal using a narrow band to operate in a new system using a wide band in this way, the base station of the new system must transmit a signal that can be received by the Rel-8 LTE terminal. I must.

  In addition, since the operation of the Rel-8 LTE terminal is started in advance, it is difficult to change the band received by the Rel-8 LTE terminal in accordance with the later operation of the new system. Further, the ratio of Rel-8 LTE terminals existing in the radio zone of one base station and terminals using a wide band dynamically changes. For this reason, in the LTE system in which the information transmission channel is assigned through the control channel, it is necessary to devise the configuration of the control channel.

The control channel is transmitted using a shared resource, and each terminal detects control information intended for itself by blind determination. In the downlink physical channel transmitted from the base station, a control channel PDCCH (Physical downlink control channel) and PDSCH (Physical downlink shared channel) are multiplexed (see, for example, Non-Patent Documents 2 to 4).
The terminal receives the PDCCH, detects the allocation information of the information transmission channel PDSCH of the terminal from the PDCCH addressed to the terminal, and receives the PDSCH based on the PDSCH allocation information. The PDCCH is scrambled differently for each terminal, and each terminal performs its own PDCCH decoding process, and the correctly detected PDCCH is determined as the PDCCH addressed to the terminal itself. This is called blind determination.

  As a control channel transmission method, a method of transmitting control information for Rel-8 LTE terminals and control information for broadband terminals by using different resources is conceivable. Therefore, such a method cannot be said to be an efficient use of resources.

  On the other hand, if the control channel resources are made common and the distribution is dynamically changed, the resources can be used efficiently. However, no study has been conducted to sufficiently exhibit the effect of interleaving performed on a signal addressed to a wideband terminal when the control channel resource is shared.

3GPP (3rd Generation Partnership Project) TS 36.306 V8.2.0 (2008-05) 3GPP TS 36.211 V8.3.0 (2008-05) 6.8 Physical downlink control channel 3GPP TS 36.212 V8.3.0 (2008-05) 5.3.3 Downlink control information 3GPP TS 36.213 V8.3.0 (2008-05) 7 Physical downlink shared channel related procedures

  Conventionally, when control information is transmitted using a common resource to a narrowband receiving apparatus and a wideband receiving apparatus, there has been a problem that sufficient consideration has not been given to interleaving for signals destined for the wideband receiving apparatus.

  The present invention has been made to solve the above problem, and when transmitting control information with a common resource to a narrowband receiver and a broadband receiver, the effect of interleaving on signals destined for the broadband receiver is sufficient. It is an object of the present invention to provide a wireless transmission device, a wireless reception device, and a transmission method that can be implemented as described above.

  In order to achieve the above object, the present invention uses a first scheme for performing radio transmission using a channel in the first bandwidth range and a channel in the second bandwidth range including the first bandwidth. Using the second method for wireless transmission, the channel assignment information is notified to the wireless reception device, and the wireless transmission device for performing data transmission notifies each of the plurality of wireless reception devices using the second method. Encoding means for encoding each of the plurality of second channel allocation information, first interleaving means for interleaving the plurality of second channel allocation information encoded by the encoding means in bit units, and First multiplexing means for multiplexing the output of the first interleaving means, and the output of the multiplexing means for the second data in units of a preset first data size. Second interleaving means for interleaving in a size range corresponding to the bandwidth, and first channel allocation information to be notified to a radio reception apparatus having a second data size that is a natural number multiple of the first data size and using the first scheme Second multiplexing means for multiplexing in the empty area of the output of the second interleaving means, and third interleaving means for interleaving the output of the second multiplexing means within a size range corresponding to the first bandwidth, A transmission means for wirelessly transmitting the output of the third interleave means is provided.

  As described above, according to the present invention, the encoded second channel allocation information interleaved in bit units is multiplexed, and the multiplexed data is set in accordance with the second bandwidth in units of the first data size. Interleave in the size range, multiplex the first channel allocation information to be notified to the wireless receiver using the first scheme in the resulting free space, interleave in the size range according to the first bandwidth, I am trying to send it.

  Therefore, according to the present invention, if the radio receiver of the first scheme performs deinterleaving within the size range corresponding to the first bandwidth, the first channel allocation information can be obtained, and the second scheme Also for the wireless reception device, the second channel allocation information can be obtained by performing deinterleaving, separation, and decoding in the reverse order to the transmission side.

  That is, even when control information is transmitted using a common resource to a first-band narrowband receiver and a second-band wideband receiver, the first channel allocation information can be transmitted. Since interleaving is performed in a size range corresponding to the second bandwidth, it is possible to provide a wireless transmission device, a wireless reception device, and a transmission method that can sufficiently exhibit the interleaving effect.

The figure for demonstrating the communication band used with the radio | wireless communications system concerning this invention. The figure for demonstrating the resource block allocated to the subcarrier shown in FIG. The figure for demonstrating the channel allocated to the resource block shown in FIG. The circuit block diagram which shows the structure of the mobile radio | wireless terminal apparatus of the radio | wireless communications system concerning embodiment of this invention. The circuit block diagram which shows the structure of the radio base station apparatus of the radio | wireless communications system concerning embodiment of this invention. The figure for demonstrating the interleaving process with respect to the PDCCH data performed with the radio base station apparatus shown in FIG. The figure which shows an example of the interleaving used by the process shown in FIG. The figure which shows an example of the interleaving used by the process shown in FIG. The figure for demonstrating the interleaving process with respect to the PDCCH data performed with the radio base station apparatus shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings.
As a wireless communication system according to the present invention, a cellular system using an OFDM scheme for a downlink will be described as an example. This radio communication system includes a mobile radio terminal device and a radio base station device, and performs radio communication using the OFDM scheme in a downlink transmitted from the radio base station device and received by the mobile radio device. There are two types of mobile radio terminal devices: type x compliant with Rel-8 LTE and type y compliant with LTE-Advanced (hereinafter abbreviated as LTE-A). Then, the radio base station apparatus transmits signals to a plurality of type x mobile radio terminal apparatuses and a plurality of type y mobile radio terminal apparatuses.

  A type x mobile radio terminal device has a maximum bandwidth capable of receiving one component (18.015 MHz), while a type y mobile radio terminal device has a maximum bandwidth capable of receiving 60 MHz including three components. Yes. Then, the radio base station apparatus transmits a signal that can be received by both mobile radio terminal apparatuses. Note that, here, 60 MHz is described as an example of the maximum reception bandwidth of a mobile radio terminal apparatus of type y, but may be n × 20 MHz (n is a natural number of 2 or more).

  As shown in FIG. 1, in one component, a DC subcarrier is arranged at the center frequency by the radio base station apparatus, and a transmission signal band of 18.015 MHz (subcarrier number 1201) is configured. That is, the subcarrier interval is 15 kHz. Note that the radio base station apparatus does not transmit on the DC subcarrier. Further, as shown in FIG. 2, the radio base station apparatus forms one RB (Resource block) with a 180 kHz bandwidth composed of 12 subcarriers. Therefore, one component has 100 RBs. Note that RB consists of 14 symbols in the time direction, and a reference signal (Reference Signal) that is a known signal as a reference of the received signal is inserted.

  One channel bandwidth of the radio base station apparatus is 20 MHz, and the difference from one component 18.015 MHz, that is, 1.985 MHz (0.9925 MHz on one side) is set as a guard band. The guard band is not used for signal transmission in consideration of the design of element parts in which it is difficult to obtain ideal characteristics such as transmission filter characteristics of the radio base station apparatus and reception filter characteristics of the mobile radio terminal apparatus. In the system description, a transmission signal bandwidth of 18 MHz and a guard bandwidth of 2 MHz (one side of 1 MHz) may be indicated except for DC subcarriers.

  FIG. 3 shows a configuration of a transmission signal of one subframe transmitted from the radio base station apparatus to the mobile radio terminal apparatuses of both types x and y. In this figure, RBs are shown side by side in the frequency direction. Signals transmitted from the radio base station apparatus to the mobile radio terminal apparatuses of both types x and y include a control channel (PCFICH, PDCCH, PHICH) for transmitting control information and a data channel (PDSCH) for transmitting transmission information. Yes, each is distributed in time division.

  As described above, the type x mobile radio terminal apparatus can receive one component, and one or more RBs are allocated from the radio base station apparatus for PDSCH reception. That is, in FIG. 3, the type x mobile radio terminal device corresponds to User B, C, D, and G. On the other hand, a mobile radio terminal apparatus of type y can receive three components at the same time, and one or more RBs are allocated from the radio base station apparatus for PDSCH reception. Note that the type y mobile radio terminal apparatus can also use a plurality of RBs belonging to different components for PDSCH reception. That is, in FIG. 3, the type y mobile radio terminal device corresponds to User A, E, and F.

  The mobile radio terminal devices of both types x and y each receive the PDCCH addressed to the own terminal, identify the RB to which the PDSCH addressed to the own terminal is assigned based on this information, and identify the identified self-terminal. Only the RB (PDSCH) addressed to the terminal is received. That is, the radio base station apparatus includes allocation information indicating which PDSCH is allocated to which mobile radio terminal apparatus in the PDCCH.

  The radio base station apparatus multiplexes and arranges the PDCCH addressed to each mobile radio terminal apparatus over the entire signal band, but the arrangement is not a fixed position for each mobile radio terminal apparatus. For this reason, each mobile radio terminal device needs to search (blindly detect) a PDCCH addressed to itself from among the multiplexed PDCCHs.

  Since only one component of the type x mobile radio terminal apparatus can be used, the radio base station apparatus can include the type x in one component so that the type x mobile radio terminal apparatus may perform blind detection for one component. PDCCH and PDSCH destined for the mobile radio terminal apparatus are arranged. On the other hand, since the mobile radio terminal apparatus of type y can use three components, the radio base station apparatus distributes and arranges the PDCCH over a wide band as shown in FIG.

  With such a distributed arrangement, the type x mobile radio terminal apparatus needs to search for the entire signal band, but the frequency diversity effect is increased and the reception quality of PDCCH can be improved.

  By the way, the LTE-A system is realized by extending the standard of the Rel-8 LTE system. On the contrary, the mobile radio terminal device of type x does not have a function of receiving a band extended by the LTE-A standard and an extended PDCCH configuration. With the introduction of the LTE-A system, the configuration of PDCCH that can be received by a type x mobile radio terminal device is not changed from Rel-8 LTE. Therefore, the LTE-A standard needs to be extended so as not to hinder the reception of the type x mobile radio terminal. The same applies to PDCCH interleaving.

  Since the ratio of the resources used by the type x mobile radio terminal apparatus and the type x mobile radio terminal apparatus for communication varies with time, the radio base station apparatus should determine in advance the resource allocation for mapping the PDCCH. The type x mobile radio terminal device and the type y mobile radio terminal device need to share PDCCH resources. For this reason, the mobile radio terminal apparatuses x and y of both types x and y each receive a large number of PDCCHs, and detect the PDCCHs addressed to themselves by performing a blind determination that searches for PDCCHs with matching CRCs.

  Further, since the PDCCH that can be detected is only addressed to its own terminal, the mobile radio terminal device of type x cannot know the size of the entire PDCCH transmitted in the LTE-A standard, that is, the resource allocation of the PDCCH. Similarly, the mobile radio terminal apparatus y cannot know the size of the entire PDCCH transmitted by the Rel-8 LTE standard, that is, the resource allocation of the PDCCH. For this reason, the reception process of the type x mobile radio terminal apparatus and the type y mobile radio terminal apparatus is preferably the same process regardless of the PDCCH resource allocation. That is, the PDCCH interleaving is preferably a predetermined interleaving that does not depend on the size of the entire PDCCH of the LTE-A standard so that reception of the type x mobile radio terminal apparatus is not hindered.

  A configuration of the mobile radio terminal apparatus will be described. FIG. 4 shows the configuration. As described above, the mobile radio terminal device of type x and the mobile radio terminal device of type y are different from each other in the number of components used for reception, and are different only in the configuration related to reception. Both will be described with reference to FIG. . Note that configurations different in the receiving system will be described in detail later.

Transmitting section 101 generates a radio signal addressed to the radio base station apparatus, and radiates this signal to space through an antenna via duplexer 108.
A radio signal transmitted from the radio base station apparatus is received by the antenna and output to the reception RF unit 109 through the duplexer 108. The received radio signal is converted into a baseband digital signal by a reception RF unit 109 including a down converter and an analog-digital converter.

  A fast Fourier transform (FFT) unit 110 performs a fast Fourier transform on the baseband digital signal, thereby dividing a time domain signal into a frequency domain signal, that is, a signal for each subcarrier. The signal divided for each subcarrier in this way is output to the frequency channel separation unit 111. The subcarriers are grouped as resource blocks by a predetermined number (for example, 12) in the radio base station apparatus, and the radio base station apparatus assigns the resource blocks to the mobile radio terminal apparatus as one unit. .

  The frequency channel separation unit 111 separates the subcarrier signal included in the resource block into the reference signal, the control channel signal, and the data channel signal for the channel band and resource block instructed by the control unit 100, respectively. .

  Also, how the channel band is divided into resource blocks, in other words, regarding the correspondence between subcarriers and resource blocks, the channel band information and the number of resource blocks are notified in advance from the radio base station apparatus to the mobile radio terminal apparatus. The correspondence between subcarriers and resource blocks is uniquely determined from channel band information and the number of resource blocks. That is, the mobile radio terminal apparatus recognizes in advance how the radio base station apparatus divides the channel band into resource blocks, and performs reception according to it.

  Among the above signals, the reference signal is descrambled by the reference signal descrambling unit 112 with a descrambling pattern opposite to the scramble pattern used in the radio base station device that transmits the signal to be received by the mobile radio terminal device, This result is output to control channel demodulation section 114, data channel demodulation section 116, and reception quality measurement section 113. Reception quality measuring section 113 measures the reception quality of Ncqi resource blocks based on the reference signal. These measurement results are output to the control unit 100.

  The control channel demodulator 114 performs channel equalization using the reference signal descrambled by the reference signal descrambling unit 112 and demodulates the control channel signal output from the frequency channel separation unit 111.

  The control channel decoding unit 115 detects PCFICH and PHICH addressed to its own terminal from the demodulated control channel, and performs deinterleaving, separation processing, error correction decoding, channel decoding on the demodulated PDCCH signal of the control channel. The PDCCH addressed to the terminal itself is blind detected. The bit string of the control channel (PCFICH, PHICH, PDCCH) obtained in this way is output to the control unit 100. Note that the reception processing in the control channel decoding unit 115 differs between the type x mobile radio terminal device and the type y mobile radio terminal device. Details thereof will be described later.

  The control unit 100 controls each unit of the mobile radio terminal device in an integrated manner. Based on the PDCCH information acquired from the control channel, the control unit 100 detects a data channel (channel band and resource block) allocated to the mobile radio terminal apparatus, and transmits data from the radio base station apparatus through this data channel. Each part (for example, frequency channel separation part 111) of the reception system is controlled so as to receive. In addition, when the control unit 100 determines that the received signal is a signal addressed to the mobile radio terminal apparatus, the control unit 100 extracts the signaling information included in the signal, and from this, information necessary for demodulation of the data channel signal, and the data channel signal Detect information necessary for decoding.

  Information necessary for demodulating the data channel signal is output to the data channel demodulator 116, while information necessary for decoding the data channel is output to the data channel decoder 117. Also, when the control unit 100 determines that the received signal is not a signal addressed to the mobile radio terminal apparatus, the data channel signal demodulation and decoding processes are stopped.

  The data channel demodulation unit 116 performs channel equalization on each signal output from the frequency channel separation unit 111 using the reference signal output from the reference signal descrambling unit 112, and then the demodulation method instructed by the control unit 100 And demodulating based on the output information.

The data bit sequence demodulated in this manner is decoded by the data channel decoding unit 117, and a downlink data bit sequence addressed to the mobile radio terminal apparatus is obtained. Information output from the control unit 100 is used for decoding here.
Prior to data reception from the radio base station apparatus, the type (x, y) and capability (UE capability) of the mobile radio terminal apparatus are transmitted to the radio base station apparatus on the uplink.

  A configuration of the radio base station apparatus will be described. FIG. 5 shows the configuration.

  The control unit 200 controls the respective units of the radio base station apparatus in an integrated manner. For example, the control unit 200 is different from the corresponding standard (Rel-8 LTE or LTE-A) of mobile radio terminal devices (x, y), Based on the data amount and priority addressed to each mobile radio terminal device and the mobile radio terminal device capability (UE capability), which channel band is allocated to which mobile radio terminal device for each frame, and which packet is transmitted Is provided with scheduler means for determining.

  The reference signal generation unit 201 generates a bit string that is a source of the reference signal, applies a scrambling code to the bit string, and outputs it to the modulation unit 203. The channel coding unit 202 includes channel coders 2021 to 202m.

  Channel encoders 2021 to 202m each encode transmission information (downlink transmission data bit string) to be transmitted through the data channel at a channel coding rate instructed by control unit 200, and modulate the downlink transmission data signal obtained thereby to modulation section It outputs to 203. The downlink transmission data bit string includes data addressed to the type x mobile radio terminal device and data addressed to the type x mobile radio terminal device.

  The PDCCH signal generation unit 215 is provided with the PDCCH data addressed to the type x mobile radio terminal device and the PDCCH data addressed to the type y mobile radio terminal device generated by the control unit 200. That is, PDCCH data addressed to the LTE-A system terminal and PDCCH data addressed to the Rel-8 LTE system terminal are provided.

  Then, the PDCCH signal generation unit 215 performs processing such as channel coding, multiplexing, and interleaving on the PDCCH data addressed to the terminal of the LTE-A system, and, as a result of this processing, the Rel-8 LTE system The PDCCH data addressed to the terminal is multiplexed and predetermined interleaving is performed to obtain a PDCCH signal. Details of processing for obtaining a PDCCH signal in the PDCCH signal generation unit 215 will be described later.

  The modulation unit 203 includes modulators 2031 to 203m corresponding to the channel coders 2021 to 202m and a modulator 203x corresponding to the PDCCH signal generation unit 215, respectively. Modulators 2031 to 203m and 203x respectively perform digital modulation such as quadrature phase shift keying (QPSK) on the reference signal, the downlink transmission data signal, and the PDCCH signal in a modulation scheme instructed by the control unit 200. Apply.

  The physical resource allocation unit 204 receives the signals digitally modulated by the modulators 2031 to 203m and 203x, and also receives the PCFICH signal and PHICH generated by the control unit 200. Then, the physical resource allocation unit 204 allocates these signals to subcarriers (resource blocks) of predetermined channels (control channel, data channel) designated by the control unit 200, respectively. Note that “assigning a signal to a subcarrier” here refers to a subcarrier index representing a position on a time axis and a frequency axis of a subcarrier in a corresponding resource block with respect to a signal represented by a complex value. Means adding.

  Note that the channel band transmitted from the radio base station apparatus is divided into the RBs described above, and the subcarriers arranged in each channel band are collected as one RB. This is uniquely obtained from the channel band information and the number of resource blocks that are notified in advance from the radio base station apparatus to the mobile radio terminal apparatus, and the mobile radio terminal apparatus recognizes the configuration of the RB. The radio base station apparatus is realized by the control unit 200 and the physical resource allocation unit 204.

The fast inverse Fourier transform (IFFT) unit 205 converts the frequency domain signal output from the physical resource allocation unit 204 into a time domain signal. This signal is converted into a radio (RF) signal by a transmission RF unit 206 including a digital-analog converter, an up-converter, a power amplifier, and the like, and is converted into a space toward a mobile radio terminal device through a duplexer 207 and an antenna. Radiated.
The receiving unit 208 receives a radio signal transmitted from the mobile radio terminal device.

  Next, generation processing of a PDCCH signal to be transmitted by a radio signal (downlink) from the radio base station apparatus to the mobile radio terminal apparatus will be described. This generation process is performed by the PDCCH signal generation unit 215. Hereinafter, the details will be described with reference to FIG. FIG. 6 shows five PDCCH data A1 to A5 addressed to five type y mobile radio terminal apparatuses and four PDCCH addressed to four type x mobile radio terminal apparatuses x for convenience of drawing size. Although data L1 to L4 are shown, there are actually more PDCCH data respectively corresponding to mobile radio terminal apparatuses.

  First, the PDCCH signal generation unit 215 performs channel coding processing such as error correction coding, CRC bit addition, and scrambling on the PDCCH data A1 to A5 addressed to the mobile radio terminal apparatus of type y (see FIG. 5). 6 (a)). As a result, according to the size and coding rate of the PDCCH data A1 to A5, encoded data having a data size that is a natural number multiple of CCE (Control Channel Elements) units is generated (FIG. 6B).

  Next, the PDCCH signal generation unit 215 selectively multiplexes the encoded data so as to obtain a predetermined size set in advance to obtain a plurality of multiplexed data (FIG. 6C). Then, the PDCCH signal generation unit 215 performs bit interleaving of a prescribed pattern with the prescribed size (FIG. 6 (d)) on the multiplexed data to obtain interleaved data (FIG. 6 (e)). )).

  Then, the PDCCH signal generation unit 215 multiplexes the data interleaved in this way into one (FIG. 6 (f)). Subsequently, the PDCCH signal generation unit 215 divides the multiplexed data into CCE units, and performs interleaving of a prescribed pattern in CCE units with the entire PDCCH size (FIG. 6 (g)) to obtain interleaved data (FIG. 6). 6 (h)).

  Here, the total size of the data obtained from the PDCCH data A1 to A5 addressed to the type y mobile radio terminal apparatus is smaller than the overall size of the PDCCH. A free space of a natural number times the size of CCE units is generated.

  Here, FIG. 7 and FIG. 8 show examples of interleave patterns in CCE units of the overall size of PDCCH. The example shown in FIG. 7 is block interleaving. In this example, writing is performed across the register corresponding to each component. That is, the data in FIG. 6F is written in CCE units in the vertical direction of the figure, and then read out for each register corresponding to each component. That is, data is read out in the horizontal direction in the figure, thereby obtaining the data shown in FIG.

  In LTE, the PDCCH size may be different for each component. FIG. 8 shows an example. In this case, similarly to the case of FIG. 7, writing is performed in the vertical direction and reading is performed in the horizontal direction. Note that the interleave pattern is not limited to the interleave patterns illustrated in FIGS. 7 and 8, and various interleave patterns are applicable to the present invention as long as they are input / output in units of CCEs.

Next, the PDCCH signal generation unit 215 divides the data shown in FIG. 6 (h) into the size defined by Rel-8 LTE, that is, for each component, and divides the PDCCH addressed to the mobile radio terminal device of type x into the free space. Data L1 to L4 are loaded and multiplexed (FIG. 6 (i)). Here, the PDCCH data L1 to L4 have a data size that is a natural number times the CCE unit.
Then, the PDCCH signal generation unit 215 interleaves the multiplexed data obtained in this way with an interleave size and pattern defined by Rel-8 LTE (FIG. 6 (j)), and for each of a plurality of components. Get the PDCCH signal.

  In FIG. 6 (h), the PDCCH signal generation unit 215 performs interleaving so as to be left justified (rightward in the drawing) within the range of the bandwidth block corresponding to each component, or for each range. If interleaved data is packed backward, free space in CCE units is likely to occur on the front side (left direction in the drawing).

  On the other hand, in each type x mobile radio terminal device, the control channel decoding unit 115 detects and demodulates PCFICH and PHICH addressed to itself from the control channel signal demodulated by the control channel demodulation unit 114. Deinterleaving corresponding to FIG. 6J is performed on the PDCCH signal included in the control channel, and descrambling and error correction decoding using CRC bits are performed for each data candidate corresponding to the PDCCH data. And blind detect PDCCH data addressed to the terminal itself.

  On the other hand, in each type y mobile radio terminal apparatus, the control channel decoding unit 115 detects PCFICH and PHICH addressed to itself from the control channel signal demodulated by the control channel demodulation unit 114, and also performs demodulated control. Deinterleaving corresponding to FIG. 6 (j) is performed on the PDCCH signal included in the channel, and then deinterleaving corresponding to FIG. 6 (g) is performed.

  Then, the control channel decoding unit 115 of each type y mobile radio terminal apparatus separates the multiplexed data into a prescribed size, and performs deinterleaving corresponding to FIG. Thereafter, descrambling and error correction decoding using CRC bits are performed for each data candidate corresponding to the PDCCH data to obtain PDCCH data A1 to A5. This data is output to the control unit 100.

  As described above, in the radio communication system configured as described above, in the radio base station apparatus, for a plurality of PDCCH data addressed to the type y mobile radio terminal apparatus, after performing channel coding, bit interleaving is performed, and Interleaves the entire PDCCH size in CCE unit size. After that, a plurality of PDCCH data addressed to the type x mobile radio terminal apparatus is multiplexed in the free space generated in units of CCE, and the bandwidth of each component is interleaved. Further, each type of mobile radio terminal device of type x and y on the receiving side detects the PDCCH data by executing a procedure reverse to the above-described interleaving.

  Therefore, according to the radio communication system configured as described above, the PDCCH data addressed to the type x mobile radio terminal device can be detected by deinterleaving defined by Rel-8 LTE, and the type y mobile radio The PDCCH data addressed to the terminal device is interleaved with the entire size of the PDCCH, so that the effect is sufficiently exerted.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. Further, for example, a configuration in which some components are deleted from all the components shown in the embodiment is also conceivable. Furthermore, you may combine suitably the component described in different embodiment.

  As an example, in the above embodiment, in the example shown in FIG. 6, data subjected to channel coding processing is multiplexed to a prescribed size and then interleaved. Instead, for example, interleaving may be performed before the multiplexing. Hereinafter, this will be described in detail with reference to FIG.

  First, the PDCCH signal generation unit 215 performs channel coding processing such as error correction coding, CRC bit addition, and scrambling on PDCCH data A1 to A5 addressed to five types of mobile radio terminal devices, respectively. (FIG. 9A). As a result, a plurality of pieces of encoded data having a data size that is a natural number multiple of the CCE (Control Channel Elements) unit is generated in accordance with the sizes and encoding rates of the PDCCH data A1 to A5 (FIG. 9B).

  Next, the PDCCH signal generation unit 215 performs bit interleaving of a prescribed pattern with the respective sizes on the data subjected to the channel coding processing (FIG. 9C), and obtains interleaved data (FIG. 9D). )).

  Then, the PDCCH signal generation unit 215 multiplexes the interleaved data of different sizes into one to obtain multiplexed data (FIG. 9 (e)). Then, the PDCCH signal generation unit 215 divides the multiplexed data into CCE units, and performs interleaving of a prescribed pattern in CCE units with the PDCCH overall size (FIG. 9 (f)) to obtain interleaved data (FIG. 9). 9 (g)).

  Here, since the total size of the data obtained from the PDCCH data A1 to A5 addressed to the five types y of mobile radio terminal apparatuses is smaller than the total size of the PDCCH, a free space having a natural number size in CCE units is smaller. Arise.

  Further, the interleave pattern described with reference to FIGS. 7 and 8 can be applied. Note that the interleave pattern is not limited to the interleave patterns illustrated in FIGS. 7 and 8, and various interleave patterns are applicable to the present invention as long as they are input / output in units of CCEs.

Next, the PDCCH signal generation unit 215 divides the data shown in FIG. 9 (g) into the size defined by Rel-8 LTE, that is, for each component, and divides the data into four types x of mobile radio terminal devices x in the free space. The addressed PDCCH data L1 to L4 are loaded and multiplexed (FIG. 9 (h)). Here, the PDCCH data L1 to L4 have a data size that is a natural number times the CCE unit.
Then, the PDCCH signal generation unit 215 interleaves the multiplexed data obtained in this way with an interleave size and pattern defined by Rel-8 LTE (FIG. 9 (i)), and generates a plurality of PDCCH signals. obtain.

  In FIG. 6 (h), the PDCCH signal generation unit 215 performs interleaving so as to be left justified (rightward in the drawing) within the range of the bandwidth block corresponding to each component, or for each range. If interleaved data is packed backward, free space in CCE units is likely to occur on the front side (left direction in the drawing).

On the other hand, in each type of x and y mobile radio terminal apparatuses, the control channel decoding unit 115 may perform deinterleaving in the reverse order to the above-described processing.
Even in such processing, the PDCCH data addressed to the type x mobile radio terminal device can be detected by deinterleaving defined by Rel-8 LTE, and the PDCCH data addressed to the type y mobile radio terminal device The data is interleaved with the entire size of the PDCCH, so the effect is fully demonstrated.
In addition, it goes without saying that the present invention can be similarly implemented even if various modifications are made without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 100 ... Control part, 101 ... Transmission part, 108 ... Duplexer, 109 ... Reception RF part, 110 ... FFT part, 111 ... Frequency channel separation part, 112 ... Reference signal descrambling part, 113 ... Reception quality measurement part, 114 ... Control Channel demodulator, 115 ... control channel decoder, 116 ... data channel demodulator, 117 ... data channel decoder, 200 ... controller, 201 ... reference signal generator, 202 ... channel coding unit, 2021-202m ... channel encoder , 203 ... modulation section, 2031 to 203m, 203x ... modulator, 204 ... physical resource allocation section, 205 ... IFFT section, 206 ... transmission RF section, 207 ... duplexer, 208 ... reception section, 215 ... PDCCH signal generation section.

Claims (10)

Using a first method of performing wireless transmission using a channel in the first bandwidth range and a second method of performing wireless transmission using a channel in the second bandwidth range that includes the first bandwidth In the wireless transmission device that notifies the wireless reception device about channel assignment with the channel assignment information and performs data transmission,
Encoding means for respectively encoding a plurality of second channel allocation information to be notified to a plurality of wireless reception devices using the second scheme;
First interleaving means for interleaving a plurality of second channel allocation information encoded by the encoding means in units of bits;
First multiplexing means for multiplexing the output of the first interleaving means;
A second interleaving means for interleaving the output of the multiplexing means in a range of a size corresponding to the second bandwidth in units of a preset first data size;
The first channel allocation information to be notified to the radio reception apparatus having the second data size that is a natural number multiple of the first data size and using the first scheme is multiplexed in the empty area of the output of the second interleave means. A second multiplexing means;
Third interleaving means for interleaving the output of the second multiplexing means in a size range corresponding to the first bandwidth;
A wireless transmission device comprising: transmission means for wirelessly transmitting the output of the third interleave means. And further comprising third multiplexing means for selectively using a plurality of second channel allocation information encoded by the encoding means to multiplex a third data size that is a natural number multiple of the data size,
The said 1st interleaving means interleaves the data of said some 3rd data size multiplexed by the said 3rd multiplexing means in the range of said 3rd data size, respectively. Wireless transmitter.   2. The radio transmission apparatus according to claim 1, wherein the second interleaving section performs interleaving to be packed at one end for each range divided into sizes corresponding to the first bandwidth. A first method for performing wireless transmission using a channel in the first bandwidth range and a second method for performing wireless transmission using a channel in the second bandwidth range including the first bandwidth are used. In a wireless receiver that is communicable and communicates using the second scheme with a wireless transmitter that notifies channel assignment with channel assignment information,
Receiving means for receiving a wireless signal transmitted by the wireless transmitting device;
First deinterleaving means for deinterleaving the output of the receiving means in a size range corresponding to the first bandwidth;
The output of the first deinterleave means remains except for the first channel allocation information that has a second data size that is a natural number multiple of the first data size set in advance and that notifies the radio receiver using the first method. Second deinterleaving means for deinterleaving data in a range of a size according to the second bandwidth in units of the first data size;
Separation means for separating the output of the second deinterleave means into a plurality of data of a predetermined size;
A third deinterleaving means for deinterleaving each of the plurality of data output by the separating means in units of bits;
A radio receiving apparatus comprising: decoding means for decoding the output of the third deinterleaving means to obtain second channel allocation information addressed to the radio receiving apparatus using the second scheme. And further comprising pre-decoding separating means for separating the output of the third deinterleaving means for each second channel allocation information,
The radio reception apparatus according to claim 4, wherein the decoding means decodes the output of the pre-decoding separation means to obtain second channel allocation information addressed to the radio reception apparatus using the second scheme. . Using a first method of performing wireless transmission using a channel in the first bandwidth range and a second method of performing wireless transmission using a channel in the second bandwidth range that includes the first bandwidth A transmission method for notifying a wireless receiver of channel assignment with channel assignment information,
An encoding step of encoding a plurality of pieces of second channel allocation information respectively notified to a plurality of radio reception apparatuses using the second scheme;
A first interleaving step of interleaving each of the plurality of second channel allocation information encoded in this encoding step in units of bits;
A first multiplexing step for multiplexing the outputs of the first interleaving step;
A second interleaving step of interleaving the output of the multiplexing step with a preset first data size as a unit in a size range according to the second bandwidth;
The first channel allocation information to be notified to the radio receiving apparatus having the second data size that is a natural number multiple of the first data size and using the first method is multiplexed in the empty area of the output of the second interleaving step. A second multiplexing step;
A third interleaving step for interleaving the output of the second multiplexing step in a size range corresponding to the first bandwidth;
And a transmission step of wirelessly transmitting the output of the third interleaving step. And a third multiplexing step of selectively using a plurality of second channel allocation information encoded in the encoding step to a third data size that is a natural number multiple of the data size,
The said 1st interleaving process interleaves the data of the said some 3rd data size multiplexed by the said 3rd multiplexing process in the range of the said 3rd data size, respectively. How to send   The transmission method according to claim 6, wherein the second interleaving step performs interleaving to be packed at one end for each range divided into sizes corresponding to the first bandwidth. Using a first method of performing wireless transmission using a channel in the first bandwidth range and a second method of performing wireless transmission using a channel in the second bandwidth range that includes the first bandwidth A reception method for receiving the channel assignment information from a wireless transmission device that notifies the wireless reception device of the channel assignment with the channel assignment information,
A reception step of receiving a radio signal transmitted by the radio transmission device;
A first deinterleaving step for deinterleaving the output of the reception step in a size range corresponding to the first bandwidth;
Except for the first channel allocation information that has a second data size that is a natural number multiple of the preset first data size and notifies the radio receiver using the first method from the output of the first deinterleaving step. A second deinterleaving step of deinterleaving data in a range of a size according to the second bandwidth in units of the first data size;
A separation step of separating the output of the second deinterleaving step into a plurality of data of a predetermined size;
A third deinterleaving step for deinterleaving each of the plurality of data output by the separation step in units of bits;
And a decoding step of decoding the output of the third deinterleaving step to obtain second channel allocation information addressed to the radio receiving apparatus using the second scheme. And a pre-decoding separation step of separating the output of the third deinterleaving step for each second channel allocation information,
The receiving method according to claim 9, wherein the decoding step decodes an output of the pre-decoding separation step to obtain second channel allocation information addressed to a radio reception apparatus using the second scheme.

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