User terminal, base station and communication method in mobile communication system

FIELD: radio engineering, communication.

SUBSTANCE: user terminal for a mobile communication system, which employs a multiple carrier scheme, includes a control signal generating unit which generates a control signal and a transmission unit which transmits the control signal to a base station. The control signal is mapped to multiple frequency bands which are provided on the entire subframe but are discrete in the frequency domain. Each frequency band includes subcarriers used in an orthogonal frequency-division multiplexing (OFDM) scheme.

EFFECT: high transmission channel capacity.

16 cl, 28 dwg

The technical field to which the invention relates.

The present invention generally relates to mobile communication technology. More specifically, the present invention relates to a base station, the user terminal and the communication method in the mobile communication system using mobile communication technology in the next generation.

The level of technology

In the field of mobile communication 3GPP involved in standardization schemes broadband multiple access with split code (Wideband Code Division Multiple Access W-CDMA), has been discussing the further development of the mobile communication system of the third generation. For example, as the successor used in mobile communication systems schemes for W-CDMA, high speed packet data in a downlink (High Speed Downlink Packet Access, HSDPA) and high speed packet data in the uplink connection (High Speed Uplink Packet Access, HSUPA) system is considered LTE (Long Term Evolution, Long term evolution). Discusses also the successor to the LTE mobile communication system, examples of which can serve as a system of IMT-advanced system, LTE-advanced and mobile telecommunications system of the fourth generation.

In LTE as a way of radio access in the downlink uses the multiplexing orthogonal frequency division (Orthogonal Frequency Division Multiplexing, OFDM), and the way radio is the access in uplink communication scheme is used multiple access frequency division on single-carrier (Single-Carrier Frequency Division Multiple Access, SC-FDMA). However, in other future mobile communication systems as a way of radio access in uplink communications can be used a multi-carrier scheme.

OFDM is a scheme for multi-carrier transmission in which the frequency band is divided into multiple narrow frequency bands (subcarriers)and data is being transmitted on these subcarriers. Subcarriers orthogonality and closely adjoin each other on the axis of frequency, which gives the possibility to achieve high transmission speeds and improve the efficiency of use of the frequency resource.

SC-FDMA is a transmission scheme with a single carrier, in which the frequency band is divided into several frequency bands in subjected to Fourier transform the frequency domain, and these frequency bands are allocated to different terminals. Scheme SC-FDMA enables simple and effective reduction of mutual interference (interference) between terminals, and reducing variations in transmit power. Thus the scheme of SC-FDMA is preferable from the viewpoint of reducing the power consumption of terminals and increase coverage. SC-FDMA may correspond to a variant of OFDM with the expansion of the spectrum by means of the FFT (DFT-spread OFDM) displaying the signal on a continuous frequency band. The use of a scheme of SC-FDMA for uplink communication is described, for example, in the document 3GPP TR 25.814 (V7.0.0) "Phsical Layer Aspects for Evolved UTRA", June 2006.

In such a mobile communication system, as LTE, for communication both in downlink and in uplink communication terminal of the user (user device) is allocated one or more resource blocks (resource blocks RB), or resource elements (resource units, RU). These resource blocks are shared by many of the terminal user in the system. In LTE, the base station performs each cupcake (duration, for example, 1 MS) operation called planning, to select the terminal (terminal) of the user, which must be allocated resource blocks. Subcat may also be called a temporary transmission interval (Transmission Time Interval, TTI). In the downlink the base station using one or more resource blocks, and transmits the shared data (shared data channel) in the terminal (terminals) of the user selected in the operation planning. This shared data channel is called physical downstream shared channel (Physical Downlink Shared Channel, PDSCH). In uplink communication terminal (terminals) of the user selected in the planning operation, using one or more resource blocks, passes (pass) common channel in a base station. This shared physical channel is called ascending shared channel (Physical Uplink Shared Channel, PUSCH).

In the system of the ligature, using shared channels, it is necessary to signal (to report) information on the allocation of the shared channel to the user terminal, as a rule, each cupcake. The downward control channel used for such signaling, called physical downward control channel (Physical Downlink Control Channel, PDCCH) or a downward control channel L1/L2 (layer 1/layer 2, layer 1/layer 2). The downward control signal may, in addition to the PDCCH, to include physical indicator control channel format (Physical Control Format Indicator Channel PCFICH) and a physical indicator channel hybrid procedures resend request (Physical Hybrid ARQ Indicator Channel, PHICH).

PDCCH, for example, contains the following information (see, for example, 3GPP R1-070103, Downlink L1/L2 Control Signaling Channel Structure: Coding):

grant top-down planning (scheduling information in downlink) (downlink scheduling grant);

grant ascending planning (uplink scheduling grant);

- overload indicator;

- bit control commands transmit power.

Information scheduling in downlink may include information relating to the General downward channel. For example, information planning in the downlink may include information on the allocation of resource blocks downlink, identification information of the user terminal (UE identifiers ID), number is otocol, information about the vectors pre-coding, data size, modulation scheme, and information related to hybrid automatic request retransmission (HARQ).

Grant planning may include information related to the rising common channel. For example, the grant of the rising planning includes information about resource allocation uplink communication, identification information of the user terminal (UE identifiers ID), data size, modulation scheme, information on the transmission power in uplink communication and information related to a reference signal for demodulation used in the MIMO scheme in uplink communication.

PCFICH is used for the message format of the PDCCH. More specifically, the PCFICH is used to report the number of OFDM symbols that is displayed PDCCH. In LTE, the number of OFDM symbols that is displayed PDCCH, is equal to one, two or three. PDCCH is mapped to the OFDM symbols at the beginning of Subhadra.

PHICH contains information acknowledgement/negative acknowledgement (acknowledgement/negative acknowledgement information (ACK/NACK)information, whether retransmission channel PUSCH transmitted in uplink communication. For each transmission element, which may be, for example, the package PHICH indicates the acknowledgement or negative acknowledgement, that is, PHICH, in fact, may be represented by one the m bit. Since the transmission of each PHICH unchanged through the network irrational, the PHICH channels for multiple users combine, forming the information provided by several bits, which is multiplexed with the separation of code and then transmitted via a radio network.

PDCCH, PCFICH and PHICH may be defined as independent channels, or it can be determined that the PCFICH and PHICH are included in the PDCCH.

In uplink communication PUSCH is used for transmission of user data (i.e. normal data signal), and control information that accompanies the user data. In addition, separately from the PUSCH provides a physical uplink control channel (Physical Uplink Control Channel, PUCCH), which is used for transmission, for example, the indicator of channel quality (CQI) of the downlink and information acknowledgement/negative acknowledgement (ACK/NACK) for the PDSCH. Indicator CQI is used, for example, for scheduling and adaptive modulation and channel coding (Adaptive Modulation And Channel Coding, AMC) physical downstream shared channel. Optionally, in uplink communication may also be shared channel Random Access Channel, RACH) signals and requests allocation of radio resources ascending and descending lines.

From the point of view of reduction of peak power to average power (Peak-to-AveragePower Ratio, PAPR) scheme with one carrier is preferable scheme with several carriers. In particular, it is important to reduce the PAPR to a terminal of the user near the cell edge. At the same time reducing the PAPR for the user terminal, located near the base station or with good conditions in the channel, is not so important. For example, for a terminal user with sufficient transmit power more significant may be the efficient and reliable transfer of large amounts of information. For such a terminal user, it is preferable to transmit a signal using a multi-carrier scheme. However, in the mobile communication system of LTE, despite the use of OFDM in downlink, uplink communication scheme is used with a single carrier. In addition, there has not been investigated using a multi-carrier scheme for uplink communication in the current and future mobile communication systems.

Disclosure of inventions

The implementation of the present invention enables efficient transmission of at least the rising of the control signal in a mobile communication system using multi-carrier scheme.

In one aspect of the present invention offers a user terminal for a mobile communication system using multi-carrier scheme. Ter the Inal user module includes forming the control signal, forming the control signal, and a transmission module that transmits the control signal to the base station. The control signal is displayed on multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain. Each band contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

The aspect of the present invention enables efficient transmission of at least the rising of the control signal in a mobile communication system using multi-carrier scheme.

Brief description of drawings

Figure 1 is a diagram of a mobile communication system.

Figure 2 is an illustration of the method (1) transmission of control information.

Figure 3 is an illustration of the method (2) transmission of control information.

Figure 4 is an illustration of the method (3) transmission of control information.

Figure 5 is an illustration of the method (4) transmission control information.

6 is an illustration of the way in (5) transmitting control information.

Figa is an illustration of a method of transmitting control information (6).

Figv is an illustration of a method of transmitting control information (7).

Fig is illustrats the Yu variant of the method of transmitting control data (6).

Figure 9 is an illustration of the way in (8) transmission of control information.

Figure 10 is an illustration of the way in (9) transmission of control information.

11 is an illustration of the method (10) for transmitting control information.

Fig is an illustration of the way in (11) transmitting control information.

Fig is an illustration of the way in (12) for transmitting control information.

Fig is an illustration of the way in (13) transmission control information.

Fig is an illustration of the way in (14) for transmitting control information.

Fig is an illustration of the way in (15) transmission control information.

Fig is an illustration of the way in (16) transmitting control information.

Fig is an illustration of the way in (17) transmission control information.

Fig is an illustration of the way in (18) transmitting control information.

Fig is an illustration of the way in (19) transmitting control information.

Fig is an illustration offered as an example of the organization of the control channel.

Fig is an illustration of another offer as an example of the organization of the control channel.

Figa is a partial structural the J. proposed as an example of the user terminal.

FIGU is a partial block diagram of the proposed as an example of the user terminal.

Figa is a partial block diagram of the proposed as an example of the user terminal.

FIGU is a partial block diagram of the proposed as an example of the user terminal.

Fig is a partial block diagram of the proposed as an example of the base station.

The implementation of the invention

Despite the division of the description of the present invention in the following sections, the differences between these sections for the present invention are not significant, and, if necessary, it is possible to combine two or more sections of the description. Although in the following description to facilitate understanding of the present invention uses specific values, these values are only examples, and unless otherwise noted, can also be any other suitable value.

A.

B. mode of transmission of the upward control channel

C. Uplink control channel (OFDM)

D. the Upward control channel (OFDM extension of the spectrum by FFT)

E. the Uplink data (OFDM)

F. the Uplink data (OFDM extension of the spectrum by FFT)

G. Organization ka the Ala management (block modulation)

H. the Organization of the control channel (block modulation)

I. the user Terminal

J. base station

The first option exercise

A.

Figure 1 is a diagram of a system 1000 mobile.

The mobile communication system 1000 includes a honeycomb 50; terminal 1001, 1002, and 1003 user equipment, UE, user devices) (may also be referred to as the terminal 100 of the user, and as the terminal 100 user); base station 200, and performs wireless communication with the terminal 100 of the user; node 300 senior level, connected with the base station 200; and core network 400 connected to the node 300 senior level. Node 300 senior level is, for example, the radio network controller (Radio Network Controller, RNC), the gateway access Gateway aGW) or the control node mobility (Mobility Management Entity, MME). In the mobile communication system 1000 of this variant implementation both in uplink and downlink use the scheme with several carriers. Although it can be used with any suitable scheme with several carriers, in this embodiment, preferably utilizing OFDM or OFDM scheme with the extension of the spectrum by FFT. In addition, in the mobile communication system 1000 may be used and the scheme with single-carrier and multi-carrier scheme. For example, the OFDM scheme can use Atisa in the area with good propagation conditions of the radio signal (for example, near the base station), and the scheme with single-carrier (SC-FDMA) can be used in areas with poor propagation conditions of the radio signal (for example, near the cell edge).

In the following description, it is assumed that the terminal 100 of the user transmits the control information to the base station 200, and the control information includes control information L1/L2 uplink communication information acknowledgement/negative acknowledgement (ACK/NACK) for the data channel transmitted in the downlink, and/or the indicator of channel quality (CQI, channel quality indicator), reflecting conditions in the downward channel. However, the control information may include any other suitable information.

The following describes methods of transmitting control information in accordance with the embodiment of the present invention. It should be noted that the following modes of transmission of control information are examples and do not cover the entire scope of the present invention.

B. Method of transmitting control information

(Method 1)

Figure 2 is an illustration of the method (1) transmission of control information.

In this example, there are two narrow bands of frequencies from the right and left end of the frequency band of the system, including many blocks (frequency) resources. The bandwidth of the system has a width of, for example, 5 MHz, 10 MHz or 20 MHz. Two bands from the right end and the left end is reserved for transmission of control information. Here, for illustrative purposes, the frequency response of the low-frequency end is called the first control frequency band, and frequency response of the high-frequency end is called the second control frequency band. For example, one resource block occupies the frequency band width of approximately 180 kHz, and the first and second control frequency bands have a width corresponding to the bandwidth of one resource block. For example, if the bandwidth of the system has a width of 5 MHz, the bandwidth of the system includes 25 blocks (#1-#25) resources, with the first block #1 resource corresponds to the first control frequency band, and the twenty-fifth block #25 resources corresponds to the second control frequency band. One radiocat, for example, contains a predetermined number (for example, 10) subbarow duration of 1 MS. Each Subcat includes, for example, two slot duration of 0.5 MS.

It should, however, be borne in mind that the values listed here are only examples, and may be used instead of any other appropriate values. The bandwidth of the system is also called the primary frequency band, and a full frequency band may include one or more of the essential bands.

In the example, not only is nom in figure 2, the control information is transmitted from user A to the base station in sequence the first and second slots. The first control frequency band used in the first slot and the second control frequency band used in the second slot. Thus, the control information is transmitted in accordance with the pattern and frequency-hopping (frequency hopping pattern) with the use of bands of frequencies far removed from each other in the frequency band of the system. This method allows to achieve a significant effect explode in frequency and therefore preferable to increase the reception quality of control information. In this example, the frequency hopping is carried out by changing the bandwidth of each slot. However, the change of the frequency band can be performed less frequently (e.g. every Subcat) or more frequently (e.g. every character slot). Since the first and second control frequency bands are not used simultaneously, the discussed method can also be applied in a system using a scheme with one carrier.

As described above, in the present embodiment of the invention one Subcat corresponds to one TTI, which, however, is not essential for the present invention.

(Method 2)

Figure 3 is an illustration of the method (2) transfer of control is the fact that information.

Figure 3 as in figure 2, the control information is transmitted from user A to the base station using the first and second control frequency bands. In this way, however, the first and second control frequency bands are used simultaneously. This method is only applicable in a system using a multi-carrier scheme. Since the first and second control frequency bands are used throughout Subhadra (or two slots), this method provides more in comparison with the method illustrated in figure 2, the bandwidth during transmission. This method is preferable when a large number of characters or bits of control information of each user, with a large number multiplexing users and under poor propagation conditions of the radio signal. Under good conditions in the channel you can get the required quality without significantly increasing the size of the data with the given number of data bits. However, under poor propagation conditions of the radio signal to achieve the required quality has to increase redundancy, and, as a consequence, the size of the data increases. Method (2) is therefore preferred in bad radio signal propagation.

In the present embodiment of the invention for using a schema with multiple n what things can be used as OFDM, and OFDM with the extension of the spectrum by FFT. From the viewpoint of reducing peak power scheme with one carrier is preferable scheme with several carriers. Similarly OFDM with the extension of the spectrum by FFT preferable OFDM terms of reducing peak power, which is associated with a different number of subcarriers.

C. Uplink control channel (OFDM)

(Method 3)

Figure 4 is an illustration of the method (3) transmission of control information.

In this way the control information is transmitted on the OFDM scheme. Next, it is assumed that the first and second control frequency bands corresponds to one resource block, and one resource block has a width of 180 kHz and contains 12 subcarriers OFDM (single carrier = 15 kHz). Thus, for transmission of control information in the first and second control frequency bands provided by 12 subcarriers (a total of 24 subcarriers).

The first and second control frequency bands used by one or more user terminals. For multiplexing users can use any known method of multiplexing. In the present embodiment of the invention for multiplexing users used multiple access frequency division (FDMA), multiple access with split code (CDMA) whether what about multiple access with time division (TDMA).

(Method 4 - FDMA)

Figure 5 is an illustration of the method (4) transmitting control information using the FDMA scheme.

Figure 5 the set of subcarriers is divided between multipleksiranje users. According to the assumption made in the description of the method (3), if you want to multiplex three users, each user is allocated 12/3=4 subcarriers in the first control frequency band. Similarly, the second control bandwidth each user is allocated 12/3=4 subcarriers. The control information of each user is displayed on the subcarriers allocated according to the FDMA scheme, and transmitted.

(Method 5 - CDMA)

6 is an illustration of the way in (5) transmitting control information using a CDMA scheme. In this way the control information of each user is expanding the range through individual code spread spectrum and is displayed on all subcarriers in the first and second control frequency bands. Expansion of the spectrum can only be done in the time or frequency direction, or both in the time and frequency directions.

(Method 6 - TDMA)

Figa is an illustration of the way in (6) transmitting control information using a TDMA scheme.

In this way one Subcat is divided into the first and the Torah slots, and in the first slot and the second slot in the first and second control frequency bands are transmitted to different sets of information. The control information of each user is displayed on the time period allotted by the TDMA scheme, and transmitted. One Subcat can be divided according to the TDMA scheme and any other allowable time periods other than slots. For example, as shown in Fig, one Subcat can be divided into periods corresponding to the OFDM symbols. However, in order to reduce the delay for user control information of each user, it is desirable to pass within a short continuous period of time (one half of the TTI, i.e. one slot), as shown in figa.

(Method 7 - TDMA/FDMA)

Also possible is the combination schemes TDMA and FDMA. Figv is an illustration of the use of schemes TDMA and FDMA in combination.

As shown in figv, one Subcat is divided into first and second slots. In the first slot and the second slot in the first and second control frequency bands are transmitted to different sets of information. In this way, in each slot also uses FDMA scheme. Although figv, the first and second control frequency band is divided into two frequency bands, the first and second control frequency bands can be divided into any number of bands.

D. the Upward control channel (OFDM with extension is the group of spectrum by FFT)

(Method 8)

Figure 9 is an illustration of the way in (8) transmission of control information.

In this way the control information is transmitted using OFDM scheme with the extension of the spectrum by FFT. In the OFDM scheme with the extension of the spectrum by FFT before sending the signal undergoes a discrete Fourier transform, the converted signal is displayed on one or more frequency ranges in the frequency domain, and for transmission over the displayed signal is the inverse Fourier transform. OFDM with the extension of the spectrum by FFT allows thereby to form a signal with a single carrier and multi carrier signal. In this next example, the OFDM scheme with the extension of the spectrum by FFT is applied so that the control signal is displayed on the first and second control frequency bands. It is also assumed that the first and second control frequency bands corresponds to one resource block, and one resource block has a width of 180 kHz.

In this method for transmitting control information of the user are used, the first and second control frequency bands, but in each of these frequency bands is used scheme with one carrier. More specifically, the management information of one user is transmitted using two subcarriers. And the YMI words, transferred simultaneously two signals, each respective one of the bearing. From the standpoint of the reduction of peak power to average power (PAPR) this method is preferable to the method illustrated in figure 4, in which the multi-carrier signal is formed as a pre-condition.

The first and second control frequency bands used by one or more of the terminal user. For multiplexing users can use any known method of multiplexing. In the present embodiment of the invention for multiplexing users used multiple access division code (CDMA) or multiple access with time division (TDMA).

(Method 9 - CDMA)

Figure 10 is an illustration of the way in (9) transmitting control information using a CDMA scheme.

In this way, similar to the method illustrated in Fig.6, the control information of each user is expanding the range through individual code spread spectrum and is displayed on the first and second control frequency bands. However, the method illustrated in figure 10 differs from the method illustrated in Fig.6, so that the first and second control frequency bands for transmitting control data schema is used with one who essay.

(Method 10)

11 is an illustration of the method (10) for transmitting control information.

Figure 10 sets of control information different users was multiplexed with the division code. At the same time figure 11 separation by code multiplexed sets of control information per user. For example, for transmission of ACK/NACK and CQI of one user are multiplexed into the code.

(Method 11)

Fig is an illustration of the way in (11) transmitting control information.

In this way, the sets of control information of different users are multiplexed with the division code. On Fig in one subcode multiplexed separation by code users of the system (for example, the LTE system), in which, as shown in figure 2, the control information is transmitted according to the scheme with one carrier, and users of the system (such as LTE-advanced (LTE-A)), in which the control information is transmitted according to the scheme with several carriers. The control information is transmitted according to the scheme of single-carrier and the first and second control frequency bands. In other words, despite the use of this type of scheme with multi-carrier signals, in essence, is transmitted in each of the two frequency bands with right and left end of the frequency band of the system under the scheme with the one chosen to replace the. Therefore, if we consider only the first operating frequency band, the signals of both systems are transferred under the scheme with one carrier. Similarly, if we consider only the second operating frequency band, the signals of both systems are transferred under the scheme with one carrier. Thus, this method allows multiplexing separation by code signals users new and old systems. If the old system uses a scheme with a single carrier, and the new system uses an OFDM scheme, using for multiplexing control information of these systems conventional division multiplexing code difficult. At the same time, the method of multiplexing users, based on the use of schemes with one carrier and division multiplexing code, gives the opportunity to improve compatibility (backward compatibility) of the new system and the old system.

(Method 12 - TDMA)

Fig is an illustration of the way in (12) transmitting control information using a TDMA scheme.

In this way one Subcat is divided into first and second slots, the first slot and the second slot are transmitted to different sets of information. The control information of each user is displayed on the time period allotted by the TDMA scheme, and transmitted. Subcat may R is sdelatsya TDMA scheme not only on slots, but on the other acceptable periods of time. For example, as shown in Fig, one Subcat can be divided into periods corresponding to the OFDM symbols. However, in order to reduce the delay for user control information of each user, it is desirable to pass within a short continuous period of time (one half of the TTI, i.e. one slot), as shown in Fig.

(Method 13)

Fig is an illustration of the way in (13) transmission control information. On Fig users of the system LTE-A was multiplexed with the division code. Meanwhile, in the example shown in Fig, users are LTE-A are multiplexed by time division. In addition, users of LTE and LTE users-A multiplexed separation by code similar Fig. This method is preferable to improve compatibility (backward compatibility) of the new system and the old system, and to reduce delays for users of LTE-A.

E. Using the same frequency band for upstream data channel

Rising control information can be transmitted separately from the data channel or co-channel data.

(Method 14)

Fig is an illustration of the way in (14) for transmitting control information.

On Fig channel data is displayed on a solid (continuous) gender is su frequencies in the OFDM scheme with the extension of the spectrum by FFT and transmitted in uplink communication. This corresponds to the case of transmitting the data channel using one or more adjacent resource blocks in LTE system. However, in the method illustrated Fig, control information is also transmitted using the resource blocks of the data channel. Because the resource blocks are consecutive, for transmission can be used the way with one carrier.

(Method 15)

Fig is an illustration of the way in (15) transmission control information.

In this way the control information is also transmitted using the resource blocks of the data channel and the data channel is also displayed on the bandwidth of the OFDM with the extension of the spectrum by FFT. In this way, however, the channel data is displayed in the frequency domain is not a continuous band of frequencies and at multiple frequency bands that are not continuous in the frequency domain. In this case, to convey at least two subcarriers (i.e., for each continuous frequency band requires one or more subcarriers), and the scheme with single-carrier used for transmission can not.

(Method 16)

Fig is an illustration of the way in (16) transmitting control information.

In this way the control information is also transmitted using the resource blocks of the data channel. However, in this method, the channel data is x is transmitted by the OFDM scheme. Thus, the data channel is transmitted using different subcarriers in the frequency band of the system.

F. the Use of a frequency band different from the upward channel data

(Method 17)

Fig is an illustration of the way in (17) transmission control information. In this way the control information is transmitted using the first and second control frequency bands and channel data is transmitted by the OFDM scheme using other frequency bands. Similarly to figure 4, the control information is transmitted on the OFDM scheme.

(Method 18)

Fig is an illustration of the way in (18) transmitting control information.

In this way the control information is also transmitted using the first and second control frequency bands and channel data is transmitted by the OFDM scheme using other frequency bands. Similar to Fig.9, the control information is transmitted on the OFDM scheme with the expansion of the spectrum by means of the FFT.

(Method 19)

Fig is an illustration of the way in (19) transmitting control information.

In this way the control information is also transmitted using the first and second control frequency bands. Similarly Fig, the data channel is transmitted using different frequency bands for OFDM with the extension of the spectrum by FFT. Similarly Fig.9, control the maintenance information is transmitted by the OFDM scheme with the expansion of the spectrum by means of the FFT.

G. Organization of the control channel (block modulation)

Fig is an illustration of the organization of the control channel offered as an example.

In this example, it is assumed that one Subcat (TTI) with a duration of 1 MS is divided into two slots of 0.5 MS, and each slot includes seven OFDM symbols. It is also assumed that two of the seven OFDM symbols used for the pilot channel (reference signal). Accordingly, the remaining five OFDM symbols can be used to transmit information other than the pilot channel. For professionals in this field should be obvious that the length of Subhadra, number of slots and the number of OFDM symbols may, in accordance with the need to change.

In this example, each of the five OFDM symbols UE_A user contains the same code sequence CAZAC1 CAZAC code. Code sequence CAZAC1 CAZAC code is the sequence length is equal to, for example, 12. Code sequence obtained by a cyclic shift of a code sequence CAZAC1 CAZAC code are code sequences CAZAC code and orthogonal to each other. This feature code sequence CAZAC code used in the example in Fig. Orthogonal code sequence used for another user UE_B is formed potentilleae shift code sequence CAZAC1 CAZAC code, used to UE_A user, the amount of shift Δ. The entire code sequence CAZAC1 CAZAC code can be multiplied by the same factor. Even in this case, the code sequence of the received cyclic shift code sequence CAZAC1 CAZAC code will be orthogonal to each other. To UE_A user provide data A1 through A5 modulation. All code sequence CAZAC1 CAZAC code in the first OFDM symbol is multiplied by the data A1 modulation. Similarly, the entire code sequence CAZAC1 CAZAC code in OFDM symbols from the second to the fifth multiplied by the data A2 through A5 modulation. Data A1-A5 modulation can be different or two or more of these data can be the same. Data modulation, for example, represent information acknowledgement/negative acknowledgement (ACK/NACK) to a downstream data channel. Alternatively, the data modulation can be an indicator of channel quality (CQI) of the downlink measured on the basis of the downward pilot channel (downstream reference signal).

In this example, for each user in one slot can be transmitted up to five sets of information, and users are multiplexed into the code using the code spread spectrum with a sequence length equal to 12.

H. The organization of the control channel (block modulation)

Fig is an illustration of the organization of the control channel offered as an example.

The duration of Subhadra, number of slots and the number of OFDM symbols is determined based on the same assumptions as for Fig, and can be optionally changed. This example also assumes that one OFDM symbol includes 12 elements of the symbol. In the example on Fig 12 elements of the symbol correspond to the elements of the code sequence CAZAC code, while in the example in Fig 12 elements SA symbol in the OFDM symbol UE_A user reflect the control information of the UE_A user. Each of the five OFDM symbols UE_A user includes 12 elements SA character. Five OFDM symbols are multiplied, respectively, on codes CA1-CA5 expanding the range with a sequence length equal to 5. Similarly, the 12 elements of the symbol SB in the OFDM symbol UE_B user reflect management information UE_B user. Each of the five OFDM symbols UE_B user includes 12 elements SB character. Five OFDM symbols are multiplied, respectively, on codes SW-SW expanding the range with a sequence length equal to 5.

In this example, for each user in one slot can be transmitted up to 12 sets of information, and users are multiplexed into to the at using the spread spectrum codes with a sequence length equal to 5. This method allows you to pass a greater amount of information for each user.

I. the user Terminal

Figa is a partial structural block diagram of the proposed as an example of the user terminal. As shown in figa, the user terminal includes a module 231 of the signal conditioning module 233 of the discrete Fourier transform (DFT)module 235 display subcarriers and module 237 inverse fast Fourier transform (OBPF).

Module 231 signal generates a sequence to the transmitted signal. This sequence is in the time domain. Module 231 of the signal can be made with the possibility of formation of any valid transmitted signal. In certain situations, when the transfer is subject to a pre-defined signal module 231 signal generates a signal sequence representing CQI indicating the level of reception in the downlink or the quality, even if the user terminal is not allocated uplink shared channel. If information is generated acknowledgement/negative acknowledgement to a downstream shared channel data received in the downlink, the module 231 signal generates a signal sequence representing information under the adoption/negative acknowledgement. Information acknowledgement/negative acknowledgement indicates either an acknowledgement (ACK)or negative acknowledgement (NACK).

Module 233 of the discrete Fourier transform (DFT) performs discrete Fourier transform on the signal sequence in the time domain, adopted from module 231 of the signal, thereby forming a signal sequence to the frequency domain.

Module 235 display subcarriers displays the signal sequence in the frequency domain on the strip (band) of frequencies (subcarriers or subcarriers)that are available for use in uplink communication. Typically, the module 235 display subcarriers displays the signal sequence on the first or second control frequency band provided for the respective ends of the frequency band of the system, or on both the bands. If the uplink communication scheme is used with a single carrier, the signal is displayed so that at any time they was a busy one continuous band of frequencies.

Module 237 inverse fast Fourier transform (OBPF) performs on the mapped signal of the inverse fast Fourier transform, thereby converting the signal into a signal of a time domain. Then the time domain signal is transmitted via the radio module (not shown).

Figv depict is to place a complete structural block diagram of another offer as an example of the user terminal. In the user terminal provided on FIGU module 232 signal shapes in the frequency domain transmitted signal. Thus, the signal generated by module 232 signal, just converted from serial to parallel module 234 series-parallel conversion (S/P) and served in module 236 display subcarriers. Module 236 display subcarriers and module 238 inverse fast Fourier transform (OBPF) perform essentially the same functions as the corresponding components shown in figa, and their description will not be repeated here.

In both terminals user presented on figa and 23B, the module 235, 236 display subcarriers is configured to display the signal in such a way that discrete (non-continuous) frequency bands are not used simultaneously. Therefore, this signal (control signal) can be transmitted using the scheme with one carrier. Accordingly, the terminal user presented on figa and figv can be used in the system, where applicable, for example, one of the ways described with reference to figure 2, 7B, 11, and 15.

Figa is a partial structural block diagram of the proposed as an example of a user terminal, which signal can be used as CX is mu with one carrier, and the multi-carrier scheme. As shown in figa, the user terminal includes a module 241, the signal conditioning module 243 serial-to-parallel conversion module 245 display subcarriers and the module 247 inverse fast Fourier transform (OBPF).

Module 241 signal generates the signal sequence in the frequency domain.

Module 243 series-parallel conversion converts a serial signal sequence in the frequency domain in parallel.

Module 245 display subcarriers displays the signal in the frequency domain on the subcarriers.

The user terminal provided on figa may pass upward signal using the scheme with several carriers. The multi-carrier signal can be formed on the OFDM or OFDM with the extension of the spectrum by FFT. When using the OFDM scheme with the extension of the spectrum by FFT user terminal provided on figa equivalent to the terminal user, presented at Figo and 23B, which for uplink communication in addition to the scheme with one carrier can use the scheme with several carriers.

Module 247 inverse fast Fourier transform (OBPF) performs on the mapped signal inverse fast convert is Urie, thereby converting the mapped signal into a signal of a time domain. Then the signal time domain is transmitted via the radio module (not shown).

You can make the assumption that the signal is transmitted using the transmission method shown in figure 3, and the first and second control frequency bands corresponds to one resource block includes 12 subcarriers. In this case, the user terminal provided on figa, can transmit uplink control signal using at the same time a band of frequencies corresponding to two resource blocks (12×2=24 subcarriers).

FIGU is a partial block diagram of another offer as an example of the user terminal.

The user terminal provided on FIGU essentially coincides with the user terminal provided on figa, except that the signal is generated for each resource block. Accordingly, the transmitted radio signals transmitted from the terminal user, presented at Figo and 24B have the same form. However, the user terminal provided on figa, allows to obtain more benefit from the extension code, and therefore preferable to the user terminal is presented on figv. For a user terminal in figa maximum coefficient of expansion of the spectrum in the frequency direction is equal to 24 (24 subcarriers). Meanwhile, for the user terminal on FIGU maximum coefficient of expansion of the spectrum in the frequency direction is equal to 12 (12 subcarriers). This distinction is especially important when the expansion of the spectrum is carried out along two dimensions, as in the time and frequency directions.

J. base station

Fig is a structural block diagram of the base station.

As shown in Fig, the base station includes a module 251 detection, synchronization and channel estimation module 252 remove guard interval, the module 253 of the fast Fourier transform (FFT)module 254 reverse display sub-module 255 demodulation data module 256 decoding data and the module 257 of determining ACK/NACK.

Module 251 detection, synchronization and channel estimation performs detection, synchronization and channel estimation based on pilot channel received in uplink communication.

Module 252 remove guard interval removes the guard interval from a received signal in accordance with the timing synchronization of a received signal.

Module 253 of the fast Fourier transform (FFT) fast Fourier transform of the received signal, thereby converting the received signal in the time domain into a signal in the frequency domain.

Module 254 reverse display subcarriers extracts the signal, topazery on subcarriers. This signal may include only the control channel and the control channel and the data channel.

Module 255 demodulation performs data demodulation data in a received signal.

Module 256 decode decodes the data signal held demodulation data.

The data demodulation and decoding of data is performed for the control channel and data channel separately, but for brevity these operations on Fig United.

Module 257 of determining ACK/NACK, for example, by the operation of the error detection sets was properly adopted the uplink data. Error detection can be performed for example, using control cyclic redundancy code (CRC cyclic redundancy check).

A useful result of embodiments

In the embodiment, the present invention offers a user terminal for a mobile communication system using multi-carrier scheme. The user terminal includes a module forming the control signal, generates the control signal, and a transmission module that transmits the control signal to the base station. The control signal is displayed on multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain. Each of these bands contains p is dassie, used in the scheme of multiplexing orthogonal frequency division (OFDM). This configuration allows transmission of the control signal using the OFDM scheme and, thereby, allows transmission of large amounts of information, and/or high-speed and reliable transmission of information.

The control signal may be displayed on the subcarriers (subcarriers)allocated under the scheme multiple access frequency division (FDMA). This enables accurate separation of the signals of multiple users.

The control signal can be carried out by expanding the range of code spread spectrum used in the multiple access scheme with the division code (CDMA). This allows you to increase the number multiplexing users. The control signal may be a two-dimensional extension of the spectrum, as in the time domain and in frequency domain.

The control signal can be transmitted in the time period allotted under the scheme multiple access with time division (TDMA). This gives the ability to separate the signals transmitted in different time periods.

Subcat may include a predetermined number of periods of the pilot transmission for transmitting a pilot channel and a predetermined number of periods of the information transfer information transfer, the balance of the Noi from the pilot channel. The signal containing the orthogonal code sequence with a sequence length corresponding to the length of each period information transmission, can be transmitted in each period, information transmission, and all orthogonal code sequence may be multiplied by one (the same) ratio. This allows to distinguish between users using orthogonal codes, and thereby reduce interference between users.

Alternatively, Subcat may include a first number of periods of the pilot transmission for transmitting the pilot channel and the second number of periods of information transmission for the transmission of information other than the pilot channel. The control signal can be transmitted in each period information transmission from among the second number of periods of the information transmission, and the control signal may be multiplied by the extension code of the spectrum with the sequence length equal to the second number. This allows you to increase the amount of information that can be transmitted for each user.

The user terminal further includes a module signal data forming the data signal. The data signal is displayed on multiple frequency bands, provided separately from the frequency bands for signal control. Band of the data signal is nedosmotreli throughout Subhadra, but are discrete in the frequency domain. Each frequency band for the data signal may contain subcarriers used in the OFDM scheme. This allows transmission of the control signal using the OFDM scheme and, thereby, allows transmission of large amounts of information, and/or high-speed and reliable transmission of information.

In the embodiment, the present invention proposes a method implemented by a user terminal for a mobile communication system using multi-carrier scheme. The method includes the step of forming the control signal and the step of transmitting the control signal to the base station. The control signal is displayed on multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain. Each of the frequency bands contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

In the embodiment, the present invention proposes a base station for a mobile communication system using multi-carrier scheme. The base station includes a receiving module, receiving the control signal from at least one user terminal, and a recovery module, restoring from a received control signal, the original signal is available to re the ACI. The control signal from the user terminal is extracted from multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain. Each of the frequency bands contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

The control signal may be the opposite of the spectrum, through code spread spectrum used in the multiple access scheme with the division code (CDMA).

The control signal can be transmitted in the time period allotted under the scheme multiple access with time division (TDMA).

Subcat may include a predetermined number of periods of the pilot transmission for transmitting a pilot channel and a predetermined number of h periods of information transmission for the transmission of information other than the pilot channel. The signal containing the orthogonal code sequence with a sequence length corresponding to the length of each period information transmission, can be made in each period, information transmission, and all orthogonal code sequence may be multiplied by one (the same) factor.

Alternatively, Subcat may include a first number of periods of the pilot transmission for transmitting pilotlog the channel and a second number of periods of the information transfer information transfer, other than the pilot channel. The control signal may be received in each period information transmission from among the second number of periods of the information transmission, and the control signal may be multiplied by the extension code of the spectrum with the sequence length equal to the second number.

The base station may also receive a data signal from the user terminal. The signal data is extracted from multiple frequency bands, provided separately from the frequency bands for signal control. Band of the data signal provided throughout Subhadra, but are discrete in the frequency domain. Each of the frequency bands for the data signal may contain subcarriers used in the OFDM scheme.

In the embodiment, the present invention proposes a method implemented by a base station for a mobile communication system using multi-carrier scheme. The method includes the step of receiving a control signal from at least one user terminal and the step of recovering the original signal pre-transfer, from a received control signal. The control signal from the user terminal is extracted from multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain. Each of the frequency bands may contain the subcarriers, used in the scheme of multiplexing orthogonal frequency division (OFDM).

The present invention can be used in any suitable system for mobile communications using uplink communication scheme with several carriers. The mobile communication system in accordance with the variants of implementation of the present invention using a multi-carrier scheme, can be combined with any other suitable system for mobile communications. For example, the mobile communication system in accordance with the variants of implementation of the present invention can be used in conjunction with the system HSDPA/HSUPA W-CDMA, LTE system, the system IMT-advanced system, WiMAX or Wi-Fi system.

The present invention is not limited to the specific disclosed variants of implementation, and without going beyond the protection of the present invention can be implemented in different types and modifications. Although in the above description to facilitate understanding of the present invention uses specific values, these values are only examples, and unless otherwise noted, can also use other values. Although in the above descriptions to facilitate explanation of the present invention uses specific formulas, these formulas are only examples, and if not what is shown otherwise, can also be used in other formulas. The differences between the variants of implementation is immaterial to the present invention, and implementation options can be used individually or in combination with each other. Despite the fact that to describe the devices in the above embodiments, the implementation used is a functional block diagram of such devices can be implemented in hardware, software, or combinations of these methods.

In this application claims the priority of application of Japan No. 2008-163843, filed June 23, 2008, the entire contents of which are incorporated herein by reference.

The list of designations

50 honeycomb;

1001, 1002, 1003 user terminal;

200 base station;

300 node senior level;

400 backbone;

231 module signal conditioning;

233 module of the discrete Fourier transform (DFT);

235 module display subcarriers;

237 module inverse fast Fourier transform (OBPF);

232 module signal conditioning;

234 module serial-to-parallel conversion (S/P);

236 module display subcarriers;

238 module inverse fast Fourier transform;

241 module signal conditioning;

243 module serial-to-parallel conversion (S/P);

245 the display module p is dneasy;

247 module inverse fast Fourier transform.

1. The user terminal for a mobile communication system using multi-carrier scheme that contains the module forming the control signal, generates the control signal; and a transmission module that transmits the control signal to the base station, and the control signal is displayed on multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain; and each band contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

2. The terminal according to claim 1, characterized in that the control signal is displayed on the subcarriers allocated under the scheme multiple access frequency division (FDMA).

3. The terminal according to claim 1, characterized in that the control signal is expanding the range by code spread spectrum used in the multiple access scheme with the division code (CDMA).

4. The terminal according to claim 3, characterized in that the control signal passes two-dimensional extension of the spectrum, as in the time domain and in frequency domain.

5. The terminal according to claim 1, characterized in that the control signal is in the time period allotted under the scheme multiple access with time division (TDMA).

6. The term is according to claim 1, characterized in that Subcat includes a predetermined number of periods of the pilot transmission for transmitting a pilot channel and a predetermined number of periods of information transmission for the transmission of information other than the pilot channel; a transmission signal including an orthogonal code sequence, occurs in each period information transmission; and an orthogonal code sequence has a sequence length corresponding to the length of each period, information transmission, and all orthogonal code sequence is multiplied by the same factor.

7. The terminal according to claim 1, characterized in that Subcat includes a first number of periods of the pilot transmission for transmitting the pilot channel and the second number of periods of information transmission for the transmission of information other than the pilot channel; a control signal occurs in each period information transmission from among the second number of periods of an information transfer; and the control signal is multiplied by the extension code of the spectrum with the sequence length equal to the second number.

8. The terminal according to claim 1, characterized in that it further comprises a module signal data forming the data signal and the data signal is displayed on several strips hour is from, provided separately from the bands for control signal; band of the data signal provided throughout Subhadra, but are discrete in the frequency domain; and each frequency band for the data signal contains subcarriers used in the OFDM scheme.

9. The method implemented by a user terminal for a mobile communication system using multi-carrier scheme, comprising the following steps: generate the control signal; and transmit the control signal to the base station, and the control signal display on multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain; and each band contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

10. A base station for a mobile communication system using multi-carrier scheme, containing the receiving module, receiving the control signal from at least one user terminal; and a recovery module, restoring from a received control signal, the source signal pre-transfer, and the control signal from at least one user terminal is extracted from multiple frequency bands, which are provided throughout Subhadra, but are discrete castetnau region; and each band contains subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).

11. The base station of claim 10, wherein the control signal is opposite of the spectrum, through code spread spectrum used in the multiple access scheme with the division code (CDMA).

12. The base station of claim 10, wherein the control signal is in the time period allotted under the scheme multiple access with time division (TDMA).

13. The base station of claim 10, wherein Subcat includes a predetermined number of periods of the pilot transmission for transmitting a pilot channel and a predetermined number of periods of information transmission for the transmission of information other than the pilot channel; receiving the signal includes an orthogonal code sequence, occurs in each period information transmission; and an orthogonal code sequence has a sequence length corresponding to the length of each period, information transmission, and all orthogonal code sequence multiplied by the same factor.

14. The base station of claim 10, wherein Subcat includes a first number of periods of the pilot transmission for transmitting letnogo channel and the second number of periods of the information transfer information transfer, other than the pilot channel; receiving the control signal occurs in each period information transmission from among the second number of periods of an information transfer; and the control signal multiplied by a code spread spectrum with a sequence length equal to the second number.

15. The base station of claim 10, characterized in that optionally accepts a data signal from at least one user terminal; a data signal is extracted from multiple frequency bands, provided separately from the bands for control signal; band of the data signal provided throughout Subhadra, but are discrete in the frequency domain; and each frequency band for the data signal contains subcarriers used in the OFDM scheme.

16. The method implemented by the base station for a mobile communication system using multi-carrier scheme, comprising the following steps: receive the control signal from at least one user terminal; and restore from a received control signal, the source signal pre-transfer, and the control signal from at least one user terminal is extracted from multiple frequency bands, which are provided throughout Subhadra, but are discrete in the frequency domain; and each band content is tons of subcarriers used in the scheme of multiplexing orthogonal frequency division (OFDM).