WO2012097669A1

WO2012097669A1 - Method and terminal for transmitting uplink control signaling

Info

Publication number: WO2012097669A1
Application number: PCT/CN2011/084909
Authority: WO
Inventors: 戴博; 梁春丽; 任璐; 杨维维
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-01-21
Filing date: 2011-12-29
Publication date: 2012-07-26
Also published as: CN102098146A

Abstract

Disclosed in the present invention is a method for transmitting uplink control signaling. In a Time Division Duplex (TDD) system, a mode of a terminal feeding back an Acknowledgement/Negative Acknowledgement (ACK/NACK) response message is channel selection mode. The ACK/NACK response message is mapped to M bits information by the terminal according to N ACK/NACK response messages which need to be fed back of a Physical Downlink Shared Channel (PDSCH), other uplink control information, and configured mapping relation. M bits information and other uplink control information are transmitted on a physical uplink control channel which is arranged with a base station. The present invention also provides a terminal for transmitting uplink control signaling. The present invention solves the problem of simultaneous transmission of response messages and scheduling requests of multiple downlink component carriers, and channel statement information effectively, and ensures the system performance.

Description

Transmission method and terminal for uplink control signaling

The present invention relates to the field of digital communications, and in particular, to a method and a terminal for transmitting uplink control signaling. Background technique

The rapid development of digital communication systems places higher demands on the reliability of data communication. However, in harsh channels, especially in high data rate or high-speed mobile environments, multipath interference and Doppler shift are severely severe. Affects system performance. Therefore, effective error control techniques, especially Hybrid Automatic Repeat Request (HARQ) technology, have become a hot research topic in the field of communication.

In the downlink HARQ of the LTE (Long Term Evolution), an ACK/NACK (ACK/NACK: Acknowledgement/Negative Acknowledgement) response message of the Physical Downlink Shared Channel (PDSCH), when the terminal (UE: When there is no physical uplink shared channel (PUSCH), the user equipment is transmitted on the physical uplink control channel (PUCCH: Physical Uplink Control Channel).

In the current LTE system, the physical uplink control channel can support multiple uplink control signaling, including a correct/error response message, and channel state information (CSI: Channel Quality Indicator, CQI: Channel Quality Indicator). A precoding matrix indicator (PMI: Precoding Matrix Indicator) and a rank indicator (RI: Rank Indicator), a scheduling request (SR: Scheduling Request), and a combination of them simultaneously transmitted.

LTE defines a variety of PUCCH formats, including PUCCH format 1/1 a/lb. The channel structure is shown in Figure 1, and format 2/2a/2b. 2, in Figure 1, spread in the frequency domain using the constant envelope zero auto-correlation sequence (CAZAC, Const Amplitude Zero Auto-Corelation) 12 times, in the time domain of 0.5ms duration, including the spread by Walsh code. The 4th order code length and the 3rd order code length generated by the discrete Fourier transform (DFT) code spreading, wherein the 4th order code length of the time domain Walsh spread represents data, and the 3rd order code length representation of the time domain DFT spread spectrum Pilot; In Fig. 2, there is no spreading in the time domain, and 10 OFDM symbols except pilots correspond to different CSI modulation symbols S0~S4 and S5~S9, and spread in the frequency domain by CAZAC sequence 12 times. Format 1 is used to send the scheduling request of the UE, format la and lb are used to feed back the 1-bit ACK/NACK response message and the 2-bit ACK/NACK response message respectively, and format 2 is used to send the downlink channel state information, format 2a Used to send CSI and 1-bit ACK/NACK response message, format 2b is used to send CSI information and 2-bit ACK/NACK response message.

In the LTE system, in the frequency division duplex system (FDD), since the uplink and downlink subframes are-corresponding, when the PDSCH contains only one transport block, the UE should feed back a 1-bit ACK/NACK response message, when the PDSCH When two transport blocks are included, the UE shall feed back a 2-bit ACK/NACK response message. Therefore, in the LTE FDD system, when the UE needs to simultaneously transmit the SR and ACK/NACK response messages: When transmitting the negative SR (indicating that no scheduling request is required), the UE transmits 1 bit on the ACK/NACK PUCCH resource allocated to it or 2-bit ACK/NACK response message, and when a positive SR is to be transmitted (indicating that a scheduling request is made;), the UE transmits a 1-bit or 2-bit ACK/NACK response message on the SR PUCCH resource allocated to it; when the UE needs to transmit simultaneously When the ACK/NACK response message and the CSI information, if the subframe is a normal cyclic prefix, a 1-bit or 2-bit ACK/NACK response message is modulated onto the second reference signal of each slot, and is transmitted by using format2a/2b. If the subframe is an extended cyclic prefix, a 1-bit or bit ACK/NACK response message and CSI information are jointly encoded, and transmitted using format 2 transmission.

In the time division duplex (TDD) system of LTE, since the uplink and downlink subframes are no longer corresponding to each other, according to different uplink and downlink subframe configurations, one uplink subframe sometimes needs to feed back ACKs of multiple downlink subframes. /NACK response message, where multiple downlink subframes corresponding to one uplink subframe are used Called a bounding window. In LTE, two ACK/NACK feedback modes are defined: One is the binding mode (bundling). The core idea of the method is to ACK/ the transport block corresponding to each downlink subframe that needs to be fed back in the uplink subframe. The NACK response message performs a logical AND operation. If a downlink subframe has 2 codeword streams, the UE needs to feed back a 2-bit ACK/NACK response message. If each subframe has only one word stream, the UE needs to feed back 1-bit ACK/NACK. The response message; the other is multiplexing (also known as multiplexing with channel selection), the core idea of which is to use different PUCCH channels and different modulation symbols on the channel to indicate that Different feedback states of the downlink subframes fed back by the uplink subframe. If there are multiple word streams on the downlink subframe, the ACK/NACK fed back by the multiple stream streams of the downlink subframe is logically ANDed (also called spatial bundling, The channel selection operation is followed by channel selection and then transmitted using PUCCH format lb. That is to say, the ACK/NACK information after the logical AND operation is indicated by the 2-bit information b(0) and b(1) carried by the PUCCH format lb, and the index of the PUCCH channel.

Therefore, in the TDD system, when the ACK/NACK response message needs to be transmitted simultaneously with the SR or CQI, the transmission method thereof is different from that in the FDD system described above. In the TDD, when the ACK/NACK response message needs to be sent simultaneously with the SR or the CQI, the UE spatially binds the multiple ACK/NACK response messages in the binding window to obtain the ACK/NACK corresponding to each downlink subframe. The response message is then obtained according to the number of ACKs after the space binding in the binding window, and the corresponding two bits W0) (1) are obtained, and then W0) (1) is sent through the PUCCH corresponding to the SR (when simultaneously When there is a Positive SR transmission, it will be modulated on the second reference signal of PUCCH format 2b, or will be jointly encoded with CQI and sent on PUCCH format 2 (the latter two cases correspond to CQI and ACK/NACK simultaneously) Scenes). The number of ACKs after the space binding in the binding window has a preset mapping relationship with W d), as shown in Table 1: The number of ACKs after the space binding in the binding window is b(0), b(D

0 or no

0, 0

(The UE detects that at least one downlink assignment is lost)

1 1, 1

2 1, 0

3 0, 1

4 1, 1

5 1, 0

6 0, 1

7 1, 1

8 1, 0

9 0, 1

Table 1: The mapping between the number of ACKs after space binding in the binding window and ^ ⁰ ), ^ ¹ ) can be implemented in the IMT-Advanced (International Mobile Telecommunications-Advanced) system. High-speed data transmission and large system capacity. In the case of low-speed mobile and hotspot coverage, the peak rate of IMT-Advanced system can reach IGbit/s. In the case of high-speed mobile and wide-area coverage, IMT-Advanced The peak rate of the system can reach 100 Mbit/s.

In order to meet the requirements of the International Telecommunication Union-Advanced (ITU-Advanced), the Long Term Evolution Advanced (LTE-A) system, which is the evolution standard of LTE, needs to support larger system bandwidth ( Up to 100MHz) and need to be backward compatible with existing LTE standards. Based on the existing LTE system, the bandwidth of the LTE system can be combined to obtain a larger bandwidth. This technology is called Carrier Aggregation (CA) technology, which can improve the spectrum of the IMT-Advance system. Utilization and mitigation of spectrum resources are scarce, thereby optimizing the utilization of spectrum resources.

The carrier-aggregated LTE system bandwidth can be regarded as a component carrier (component carrier), and each component carrier frequency can also be referred to as a cell (Cell), that is, one spectrum can be carried by n component carriers. (Cell) polymerized. The resources of an R10 user equipment (UE, User Equipment) are composed of n cells (component carrier frequencies) in the frequency domain, where one cell Called the primary cell (Primary cell), the remaining cell is called a secondary cell (Secondary cell) ₀ after the carrier aggregation is introduced, the current discussion on the downlink component carrier and the PDSCH transmission block and the HARQ process relationships, a basic working assumption is that when not used In the case of space division multiplexing, one downlink component carrier corresponds to one PDSCH transmission block and one HARQ process, that is, the UE needs to feed back 1-bit ACK/NACK response information for one PDSCH transmission block of each component carrier. When using space division multiplexing, LTE-A currently specifies up to 2 transport blocks. Therefore, when space division multiplexing is employed, the UE needs to feed back a 2-bit ACK/NACK response message for 2 PDSCH transmission blocks of each downlink component carrier.

In the LTE-A system using the spectrum aggregation technique, the uplink bandwidth and the downlink bandwidth may include a plurality of component carriers. When the base station schedules a PDSCH for a certain UE on multiple downlink component carriers, and when the UE does not transmit a PUSCH in the current subframe, the terminal needs to feed back the ACK of the PDSCH transmission of the multiple downlink component carriers on the PUCCH. NACK response message. A current work assumes that these ACK/NACK response messages are sent over a UE-specific uplink component carrier; for SR information, the current one assumes that the UE transmits only one SR, and this SR information is passed through a UE-specific The uplink component carrier is transmitted. For CSI information, the current work assumes that the CSI information is transmitted through a UE-specific uplink component carrier.

In the LTE-A system, the current work assumes that the UE transmits using PUCCH format 1 for SR information, and PUCCH format 2 for CSI, and the ACK/NACK response message can be used in addition to LTE. PUCCH format la and lb, multiplexing with channel selection, LTE-A boosts a new DFT-s-OFDM based format for transmitting larger payload ACK/NACK response messages The schematic diagram of the channel structure is shown in FIG. 3. For convenience of description, this structure is called PUCCH Format 3. In PUCCH Format 3, the time domain of 5 ms duration is spread by DFT code to generate a 5th order code length for indicating Data, no spread spectrum in the frequency domain, each frequency domain location is independent Modulation symbols S0~S23. Which method the UE uses to feed back ACK/NACK is configured by the upper layer. In the LTE-A FDD system, when the UE is configured to use the PUCCH format 3 feedback ACK/NACK, if the UE also sends the SR in the current subframe, the UE jointly encodes the SR and multiple ACK/NACK response messages. It is then sent on PUCCH format 3. For the UE configured to use the channel selection to feed back ACK/NACK, if the current subframe also needs to send SR or CSI at the same time, if the TDD method in LTE is followed, we can see from Table 1 that when the base station receives Wo) a)= (1, 1), the base station will not be able to determine whether the UE correctly received one or correctly received four PDSCHs. Therefore, from the perspective of the robustness of the system, the base station assumes that only one is received. Therefore, for a scenario in which the UE correctly receives four PDSCHs, the base station is also retransmitted, and thus the system throughput performance is degraded. Therefore, there is a need for an improved ACK/NACK and SR/CSI simultaneous transmission method. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a terminal for transmitting uplink control signaling, so that a terminal in a multi-carrier system with a large bandwidth transmits an ACK/NACK response message and other uplink control information to the base station.

In order to solve the above problem, the present invention discloses a method for transmitting uplink control signaling, and the method includes:

In a time division duplex (TDD) system, the mode in which the terminal feeds back the correct/error ACK/NACK response message is a channel selection mode, and the terminal according to the ACK/NACK response message of the N physical downlink shared channel PDSCH to be fed back and other uplinks The control information and the set mapping relationship map the ACK/NACK response message into M bit information, and send the M bit information and other uplink control information on a physical uplink control channel agreed with the base station.

Preferably, when the other uplink control information is the scheduling request SR, only the ACK/NACK response message corresponding to the primary cell and the SR are fed back, wherein the ACK/NACK response message corresponding to the primary cell is bound according to the channel selection mode. Map to 2 bits, M=2; Preferably, the other uplink control information is channel state information CSI, and when the number of serving cells configured by the terminal is 2, the ACK/NACK response message is mapped to 4 bits according to the binding mode of the channel selection mode, and each serving cell corresponds to 2 bits, transmitting the mapped 4-bit information and CSI information, where M=4;

Preferably, the method further includes: when the cyclic prefix is a normal cyclic prefix (Normal CP, Normal Cyclic Prefix), the number of bits of the physical uplink control channel transmitted by the CSI is X, and the mapping is performed after the mapping The 4-bit information and CSI information are:

The 2-bit information corresponding to the primary cell is mapped to the second reference signal of each slot of the physical uplink control channel by QPSK modulation, and the 2-bit information corresponding to the secondary cell is mapped to the last two bit positions of the X bits. Or, the 2-bit information corresponding to the primary cell is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped at the last fourth bit position and the last number of the X bits. Or three bits of information corresponding to the secondary cell are mapped to the last two bit positions of the X bits, and the 2-bit information corresponding to the primary cell is mapped to the fourth bit of the last bit of the X bits. Position and the third bit position of the last number;

Preferably, the method further includes: when the cyclic prefix is an extended cyclic prefix (Extended CP, Extended Cyclic Prefix), the number of bits of the physical uplink control channel transmitted by the CSI is X, and the mapping is performed after the mapping The 4-bit information and the CSI information are: the 2-bit information corresponding to the primary cell is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped at the last fourth bit of the X bits. Position and the third bit position of the last bit, or the 2-bit information corresponding to the secondary cell is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the primary cell is mapped to the reciprocal of the X bits. The fourth bit position and the third bit position of the last number;

Preferably, the method further includes: when the CSI information is transmitted at the bit position, deleting the CSI information, and transmitting the bit information after the ACK/NACK response message mapping; Preferably, the transmitting the M-bit information and other uplink control information on a physical uplink control channel agreed with the base station is:

When the other uplink control information is the SR, the terminal sends the 2-bit information to the physical uplink control channel corresponding to the SR after the QPSK modulation of the quadrature phase shift keying signal, where the physical area corresponding to the SR The uplink control channel adopts the format lb;

When the other uplink control information is CSI, the terminal sends the M-bit information on a physical uplink control channel corresponding to the CSI,

When the physical uplink control channel corresponding to the CSI adopts a regular cyclic prefix, the 2-bit information is QPSK-modulated and sent on a second reference signal of each time slot of the physical uplink control channel format 2b. After the 2-bit information is jointly encoded with the CSI, it is sent on the physical uplink control channel format 2b, or the 4-bit information is jointly encoded with the CSI, and then on the physical uplink control channel format 2 Send

When the physical uplink control channel corresponding to the CSI adopts an extended cyclic prefix, the 4-bit information is jointly encoded with the CSI, and then transmitted on the physical uplink control channel format 2.

The present invention further provides a terminal, the terminal comprising: a mapping module and a sending module; wherein, the mapping module, in the time division duplex (TDD) system, when the mode of feeding back the ACK/NACK response message is the channel selection mode, according to the feedback The correct/error ACK/NACK response message of the N physical downlink shared channel PDSCH and other uplink control information, and the set mapping relationship maps the ACK/NACK response message into M bit information;

And a sending module, configured to send the M-bit information mapped by the mapping module and other uplink control information on a physical uplink control channel agreed with the base station.

Preferably, the mapping module is specifically configured to:

When the other uplink control information is the scheduling request SR, only the ACK/NACK response message corresponding to the primary cell and the SR are fed back, where the ACK/NACK response corresponding to the primary cell is cancelled. The information is mapped to 2 bits according to the binding mode of the channel selection mode, M=2;

When the other uplink control information is the channel state information CSI, and the number of serving cells configured by the terminal is 2, the ACK/NACK response message is mapped to 4 bits according to the binding mode of the channel selection mode, and each serving cell corresponds to 2 Transmitting the mapped 4-bit information and CSI information, where M=4;

Preferably, the mapping module is further configured to: the number of bits transmitted by the physical uplink control channel for transmitting the CSI is X, and when the cyclic prefix is a standard cyclic prefix, the 2-bit information corresponding to the primary cell is subjected to QPSK modulation mapping. Mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits on the second reference signal of each time slot of the physical uplink control channel, or Bit information is mapped on the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped to the fourth and third bit positions of the X bits, or Mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits, mapping the 2-bit information corresponding to the primary cell to the fourth bit position of the X bits and the third last bit position Bit position

When the cyclic prefix is an extended cyclic prefix, the 2-bit information corresponding to the primary cell is mapped to the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped to the reciprocal of the X bits. Or mapping the second bit position and the third bit position of the last cell, or mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits, and mapping the 2-bit information corresponding to the primary cell to the location Describe the fourth bit position of the last bit of the X bits and the third bit position of the last number;

Preferably, the mapping module is further configured to: when the CSI information is transmitted at the bit position, cancel the CSI information, and transmit the bit information after the ACK/NACK response message mapping; preferably, the sending The module is specifically used to:

When the other uplink control information is SR, the terminal performs the four-phase phase on the 2-bit information. The shift keying signal QPSK is modulated and transmitted on the physical uplink control channel corresponding to the SR, wherein the physical uplink control channel corresponding to the SR adopts the format lb;

When the physical uplink control channel corresponding to the CSI adopts a regular cyclic prefix, the 2-bit information is QPSK-modulated and sent on a second reference signal of each time slot of the physical uplink control channel format 2b. After the 2-bit information is jointly encoded with the CSI, it is sent on the physical uplink control channel format 2b, or the 4-bit information is jointly encoded with the CSI, and the physical uplink control channel is used. Sent on format 2;

And when the physical uplink control channel corresponding to the CSI adopts an extended cyclic prefix, the 4-bit information is jointly encoded with the CSI, and then sent on the physical uplink control channel format 2.

The invention provides a transmission method and a terminal for uplink control signaling, which effectively solves the problem that the response message, the scheduling request and the channel state information of multiple downlink component carriers are simultaneously transmitted, and ensures the performance of the system. DRAWINGS

Figure 1 is a schematic diagram of PUCCH format 1/la/lb when a conventional cyclic prefix is used for a subframe in the existing LTE system;

2 is a schematic diagram of a PUCCH format 2/2a/2b when a conventional cyclic prefix is used in a legacy LTE system;

FIG. 3 is a schematic diagram of a PUCCH format 3 when a conventional cyclic prefix is used for a subframe in an existing LTE system;

FIG. 4 is a schematic flowchart diagram of a method for transmitting uplink control signaling according to the present invention. detailed description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other without conflict.

The present invention implements a method for transmitting uplink control signaling. As shown in FIG. 4, the method includes the following steps:

Step 101: In the TDD system, the mode in which the terminal feeds back the ACK/NACK response message is a channel selection mode, and the terminal according to the correct/error ACK/NACK response message and other uplink control information of the N physical downlink shared channel PDSCH to be fed back. And mapping the ACK/NACK response message to M bit information;

Step 102: Send the M-bit information and other uplink control information on a physical uplink control channel agreed with the base station. Example 1

In the time division duplex (TDD) system, the mode in which the terminal feeds back the ACK/NACK response message is the channel selection mode, and the number of serving cells configured by the terminal is 2, when the N physical downlink shared channel PDSCH to be fed back by the terminal is correct/ When the ACK/NACK response message and the scheduling request SR are received, only the ACK/NACK response message and the SR corresponding to the primary cell are fed back, wherein the ACK/NACK response message corresponding to the primary cell is mapped to 2 according to the binding mode of the channel selection mode. Bit, M=2;

The specific binding modes are as shown in Table 2, Table 3 and Table 4; HARQ-ACK (O), HARQ-ACK (1), HARQ-ACK (2), and HARQ-ACK (3) represent N physical downlink shared channels. The correct/error ACK/NACK response message of the PDSCH passes the spatially bound response message; DTX indicates no response message corresponding, and any indicates ACK (A) /NACK ( N ) /DTX ( D );

NACK, ACK NACK/DTX, ACK

ACK, NACK/DTX ACK, NACK/DTX

NACK/DTX, any NACK/DTX, NACK/DTX Table 2: Mapping relationship when the number of downlink subframes corresponding to the uplink subframe is 2

HARQ-ACK(O), HARQ-ACK(l), HARQ-ACK(2) 2-bit information

ACK, ACK, ACK ACK, ACK

ACK, ACK, NACK/DTX NACK/DTX, ACK

ACK, NACK/DTX, any ACK, NACK/DTX

NACK/DTX, any, any NACK/DTX, NACK/DTX Table 3 Mappings when the number of downlink subframes corresponding to the uplink subframe is 3.

Table 4: A mapping relationship when the number of downlink subframes corresponding to the uplink subframe is 4.

Table 6 Another mapping relationship when the number of downlink subframes corresponding to the uplink subframe is 4: The terminal performs phase shifting of the 2-bit information (where ACK corresponds to "1" and NACK/DTX corresponds to "0") The physical uplink control signal corresponding to the SR after the keying signal QPSK is modulated Intra-channel transmission, where the physical uplink control channel corresponding to the SR adopts a format lb;

Mapping between 2-bit information and QPSK modulation symbols

Example 2

In the time division duplex (TDD) system, the mode in which the terminal feeds back the ACK/NACK response message is the channel selection mode, and the number of serving cells configured by the terminal is 2, when the N physical downlink shared channel PDSCH to be fed back by the terminal is correct/ The ACK/NACK response message is mapped to 4 bits according to the binding mode of the channel selection mode, and each serving cell corresponds to 2 bits, and the mapped 4-bit information is transmitted. And CSI information, where M=4;

Assume that the number of bits that the physical uplink control channel transmitting the CSI can transmit is X, and X can be 11 or 13;

When the cyclic prefix is a standard cyclic prefix, the 2-bit information corresponding to the primary cell is transmitted on the second reference signal of each slot of the physical uplink control channel format 2b after being modulated by QPSK, and the corresponding 2 bits of the secondary cell are used. The information is mapped on the last two bit positions of the X bits; the 2-bit information is jointly encoded with the CSI, and then sent on the physical uplink control channel format 2b;

When the cyclic prefix is an extended cyclic prefix, the 2-bit information corresponding to the primary cell is mapped to the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped to the fourth last of the X bits. a bit position and a third bit position of the last bit; the 4-bit information is jointly encoded with the CSI, and then transmitted on the physical uplink control channel format 2; when there is CSI information transmission at the bit position, Deleting the CSI information, and transmitting the bit information mapped by the ACK/NACK response message;

Example 3 In the time division duplex (TDD) system, the mode in which the terminal feeds back the ACK/NACK response message is the channel selection mode, and the number of serving cells configured by the terminal is 2, when the N physical downlink shared channel PDSCH to be fed back by the terminal is correct/ The ACK/NACK response message is mapped to 4 bits according to the binding mode of the channel selection mode, and each serving cell corresponds to 2 bits, and the mapped 4-bit information is transmitted. And CSI information, where M=4;

When the cyclic prefix is a standard cyclic prefix, the 2-bit information corresponding to the primary cell is mapped to the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped to the fourth last of the X bits. a bit position and a third bit position of the last bit; the 4-bit information is jointly encoded with the CSI, and then transmitted on the physical uplink control channel format 2; when the cyclic prefix is an extended cyclic prefix, the primary cell corresponds to The 2-bit information is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped at the last fourth bit position and the third last bit position of the X bits; After the 4-bit information is jointly encoded with the CSI, it is sent on the physical uplink control channel format 2; when there is CSI information transmission at the bit position, the CSI information is deleted, and the ACK/NACK is transmitted. Answering the bit information after the message is mapped;

Example 4

The embodiment provides a terminal, where the terminal includes: a mapping module and a sending module; wherein, the mapping module, in the time division duplex (TDD) system, when the mode of feeding back the ACK/NACK response message is the channel selection mode, according to the required Transmitting the correct/error ACK/NACK response message of the N physical downlink shared channel PDSCH and other uplink control information, and setting the mapping relationship to map the ACK/NACK response message into M bit information;

a sending module, configured to map the M-bit information mapped by the mapping module with other uplink control signals The information is sent on the physical uplink control channel agreed with the base station.

The mapping module is specifically configured to:

When the other uplink control information is the scheduling request SR, only the ACK/NACK response message corresponding to the primary cell and the SR are fed back, wherein the ACK/NACK response message corresponding to the primary cell is mapped to 2 bits according to the binding mode of the channel selection mode. , M=2;

It is assumed that the physical uplink control channel for transmitting the CSI can transmit X bits. When the cyclic prefix is a standard cyclic prefix, the 2-bit information corresponding to the primary cell is mapped to the physical uplink control channel by QPSK modulation. Mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits on the second reference signal of the time slot, or mapping the 2-bit information corresponding to the primary cell to the X Mapping the 2-bit information corresponding to the secondary cell to the fourth bit position and the third bit position of the X-bit, or the 2-bit information corresponding to the secondary cell, in the last two bit positions of the bit Mapping the last two bit positions of the X bits, mapping 2-bit information corresponding to the primary cell to a fourth bit position and a third bit position of the last bit of the X bits;

The mapping module is further configured to: when there is CSI information transmission at the bit position, And deleting the CSI information, and transmitting the bit information after the ACK/NACK response message mapping; the sending module is specifically configured to:

When the physical uplink control channel corresponding to the CSI adopts a regular cyclic prefix, the 2-bit information is QPSK-modulated and sent on a second reference signal of each time slot of the physical uplink control channel format 2b. The 2-bit information is jointly encoded with the CSI, and then transmitted on the physical uplink control channel format 2b.

When the physical uplink control channel corresponding to the CSI adopts an extended cyclic prefix, the 4-bit information is jointly encoded with the CSI, and then transmitted on the physical uplink control channel format 2. Industrial applicability

The method of the present invention effectively solves the problem that the response message and the scheduling request and the channel state information of multiple downlink component carriers are simultaneously transmitted.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A method for transmitting uplink control signaling, the method comprising: in a time division duplex (TDD) system, a mode in which a terminal feeds back a correct/erroneous ACK/NACK response message is a channel selection mode, the terminal And mapping the ACK/NACK response message into M bit information according to the ACK/NACK response message of the N physical downlink shared channel PDSCH to be fed back, and other uplink control information, and setting the M bit information And other uplink control information is sent on a physical uplink control channel agreed with the base station.

2. The method of claim 1 wherein:

When the other uplink control information is a scheduling request (SR), only the ACK/NACK response message corresponding to the primary cell and the SR are fed back, wherein the ACK/NACK response message corresponding to the primary cell is mapped according to the binding mode of the channel selection mode. It is 2 bits, M=2.

The method according to claim 2, wherein the transmitting the M bit information and other uplink control information on a physical uplink control channel agreed with the base station is:

The terminal transmits the 2-bit information to the physical uplink control channel corresponding to the SR, and the physical uplink control channel corresponding to the SR adopts the format lb.

The method according to claim 1, wherein the other uplink control information is channel state information (CSI), and when the number of serving cells configured by the terminal is 2, the ACK/NACK response message is in a channel selection mode. The binding mode is mapped to 4 bits, and each serving cell corresponds to 2 bits, and the mapped 4-bit information and CSI information are transmitted, where M=4.

5. The method of claim 4, wherein the method further comprises:

When the cyclic prefix is a standard cyclic prefix, the number of bits of the physical uplink control channel transmitted by the CSI is X, and the transmitted 4-bit information and the CSI information are: The QPSK modulation is mapped on the second reference signal of each slot of the physical uplink control channel, and the 2-bit information corresponding to the secondary cell is mapped in the X The last two bit positions of the bits;

Or,

The 2-bit information corresponding to the primary cell is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped at the last fourth bit position and the third last bit position of the X bits. Upper

Or,

The 2-bit information corresponding to the secondary cell is mapped at the last two bit positions of the X bits, and the 2-bit information corresponding to the primary cell is mapped at the last fourth bit position and the third last bit position of the X bits. on.

6. The method of claim 4, wherein the method further comprises:

When the cyclic prefix is an extended cyclic prefix, the number of bits of the physical uplink control channel transmitted by the CSI is X, and the transmitted 4-bit information and CSI information are: 2-bit information corresponding to the primary cell. Mapping the last two bit positions of the X bits, the 2-bit information corresponding to the secondary cell is mapped at the last fourth bit position and the third last bit position of the X bits;

Or,

The method according to claim 5 or 6, wherein the method further comprises: when the CSI information is transmitted at the bit position, the CSI information is deleted, and the ACK/NACK response message is transmitted. Mapped bit information.

The method according to claim 5 or 6, wherein the M bit information and other uplink control information are sent on a physical uplink control channel agreed with the base station as: when the CSI is corresponding to When the physical uplink control channel adopts a regular cyclic prefix, the 2 After the bit information is QPSK-modulated, it is sent on a second reference signal of each time slot of the physical uplink control channel format 2b, and the 2-bit information is jointly encoded with the CSI, and the physical uplink control channel is used. The format 2b is sent, or the 4-bit information is jointly encoded with the CSI, and then sent on the physical uplink control channel format 2;

A terminal, comprising: a mapping module and a sending module; wherein, the mapping module, in a time division duplex (TDD) system, when the mode of feeding back an ACK/NACK response message is a channel selection mode, according to The correct/error ACK/NACK response message and other uplink control information of the N physical downlink shared channel PDSCH to be fed back, and the set mapping relationship maps the ACK/NACK response message into M bit information;

The terminal according to claim 9, wherein the mapping module is specifically configured to: when the other uplink control information is a scheduling request SR, only feedback corresponding to the primary cell

An ACK/NACK response message and an SR, where the ACK/NACK response message corresponding to the primary cell is mapped to 2 bits according to the binding mode of the channel selection mode, M=2;

When the other uplink control information is the channel state information CSI, and the number of serving cells configured by the terminal is 2, the ACK/NACK response message is mapped to 4 bits according to the binding mode of the channel selection mode, and each serving cell corresponds to 2 Bits, the mapped 4-bit information and CSI information are transmitted, where M=4.

The terminal according to claim 10, wherein the mapping module is further configured to: the number of bits transmitted by the physical uplink control channel for transmitting the CSI is X, and when the cyclic prefix is a standard cyclic prefix, The 2-bit information corresponding to the primary cell is mapped by QPSK modulation. Mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits, or the 2-bit information corresponding to the primary cell, on the second reference signal of each time slot of the physical uplink control channel Mapping the last two bit positions of the X bits, mapping the 2-bit information corresponding to the secondary cell to the last fourth bit position and the third last bit position of the X bits, or The 2-bit information corresponding to the cell is mapped on the last two bit positions of the X bits, and the 2-bit information corresponding to the primary cell is mapped to the fourth bit position and the third bit position of the last bit of the X bits. on;

When the cyclic prefix is an extended cyclic prefix, the 2-bit information corresponding to the primary cell is mapped to the last two bit positions of the X bits, and the 2-bit information corresponding to the secondary cell is mapped to the last of the X bits. And mapping the 2-bit information corresponding to the secondary cell to the last two bit positions of the X bits, and mapping the 2-bit information corresponding to the primary cell to the fourth bit position and the third bit position of the last bit. The fourth bit position of the inverse of the X bits and the third bit position of the last.

The terminal according to claim 11, wherein the mapping module is further configured to: when the CSI information is transmitted at the bit position, cancel the CSI information, and transmit the

The bit information after the ACK/NACK response message is mapped.

The terminal according to claim 9, wherein the sending module is specifically configured to: when the other uplink control information is an SR, the terminal performs the four-phase phase shift keying signal QPSK on the 2-bit information. The modulation is performed on the physical uplink control channel corresponding to the SR, where the physical uplink control channel corresponding to the SR adopts the format lb;

When the physical uplink control channel corresponding to the CSI adopts a regular cyclic prefix, the 2-bit information is QPSK-modulated and sent on a second reference signal of each time slot of the physical uplink control channel format 2b. The joint coding of the 2-bit information and the CSI After being sent on the physical uplink control channel format 2b, the 4-bit information is jointly encoded with the CSI, and then sent on the physical uplink control channel format 2;