CN102263620B - Method, device and system for feeding back multi-carrier response messages - Google Patents

Abstract

The embodiment of the present invention discloses a feedback method, device and system for multi-carrier response information, relates to the field of communication technology, and provides an innovative solution for feedback and transmission of response information in a carrier aggregation scenario. The feedback method for multi-carrier response information provided by the embodiment of the present invention includes: determining the feedback state of the response information according to the response information of each downlink component carrier, and the feedback state includes at least a first state and a second state, wherein Each downlink component carrier includes at least one scheduled component carrier and/or at least one unscheduled component carrier; generating response information to be transmitted according to the feedback status and sending the response information to be transmitted in an uplink direction.

Description

A feedback method, device and system for multi-carrier response information

technical field

The present invention relates to the field of communication technology, in particular to a feedback method, device and system for multi-carrier response information.

Background technique

In Hybrid Automatic Repeat Request (HARQ) technology, the data receiver needs to feed back response information to the data sender to help the data sender confirm whether the data is received correctly. Usually, an acknowledgment (Acknowledgment, ACK) is used to indicate correct reception, and a negative acknowledgment (Negative-acknowledgement, NACK) is used to indicate incorrect reception. In the uplink (Uplink) direction of the 3rd Generation Partnership Project (3GPP) Evolved Universal Terrestrial Radio Access (E-UTRA) system, the user equipment passes the physical uplink control channel ( The Physical Uplink Control Channel, PUCCH) feeds back the response information of downlink data reception to the base station. The 3GPP E-UTRA system is also called a Long Term Evolution (LTE) system.

In the further evolution and enhancement (LTE-Advanced, LTE-A) system of the LTE system, the carrier aggregation technology is selected to support a wider bandwidth to meet the peak data rate requirements of the International Telecommunication Union for the fourth generation communication technology. In carrier aggregation technology, spectrums of two or more component carriers are aggregated together to obtain wider transmission bandwidth. LTE-A user equipment can be configured with different numbers of uplink and downlink component carriers, and each component carrier has an independent HARQ process. The data transmitted to the user equipment on the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) of the component carrier must feed back corresponding response information. When the response information corresponding to data transmission on multiple downlink component carriers needs to be fed back in the same uplink component carrier, it is necessary to solve the problem of feeding back the response information corresponding to data transmission on multiple downlink component carriers in the same uplink component carrier. However, a specific solution for solving this problem in the LTE-A communication system has not been explicitly proposed in the prior art.

Contents of the invention

In order to solve the problems existing in the prior art, embodiments of the present invention provide a method, device and system for feeding back multi-carrier response information.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A method for feeding back multi-carrier response information, the method comprising:

According to the response information of each downlink component carrier, determine the feedback state of the response information, the feedback state includes at least a first state and a second state, and the first state indicates that only all transmissions on the predetermined component carriers have been received and feed back acknowledgment information to all the scheduled component carriers, the second state indicates that at least one unscheduled component carrier has received data transmitted on the component carrier and there is no data loss, and all component carriers that transmit data feeding back acknowledgment response information, wherein each downlink component carrier includes at least one scheduled component carrier and/or at least one unscheduled component carrier;

generating response information to be transmitted according to the feedback status and sending the response information to be transmitted in an uplink direction.

A method for feeding back multi-carrier response information, the method comprising:

receiving response information to be transmitted, where the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier;

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, the feedback state includes at least a first state and a second state, and the first state indicates only receiving all the data transmitted on the predetermined component carrier and generating acknowledgment information for all the predetermined component carrier, the second state indicates that the data transmitted on at least one unscheduled component carrier is received and there is no data loss, and generating acknowledgment information for all component carriers that transmit data, where each downlink component carrier includes at least one scheduled component carrier and/or at least one unscheduled component carrier;

Perform corresponding operations according to the feedback status.

A device for feeding back multi-carrier response information, the device comprising:

A feedback state determination unit, configured to determine a feedback state for the response information according to the response information for each downlink component carrier, the feedback state includes at least a first state and a second state, and the first state indicates that only the received All the data transmitted on the predetermined component carrier and all the predetermined component carriers feed back acknowledgment response information, the second state indicates that the data transmitted on at least one unscheduled component carrier is received and there is no data loss, and all All the component carriers transmitting data feed back acknowledgment response information, wherein the downlink component carriers include at least one scheduled component carrier and/or at least one unscheduled component carrier;

A feedback sending unit, configured to generate response information to be transmitted according to the feedback status and send the response information to be transmitted in an uplink direction.

A base station, comprising:

The receiving unit is configured to receive response information to be transmitted, the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier;

An analysis unit, configured to analyze the response information to be transmitted to obtain the feedback status according to the mapping relationship between the response information to be transmitted and the feedback status, the feedback status includes at least a first status and a second status, the The first state indicates that only the data transmitted on all the predetermined component carriers is received and the acknowledgment information is generated for all the predetermined component carriers, and the second state indicates that the data transmitted on at least one non-scheduled component carrier is received and not There is data loss, and generating acknowledgment information for all the component carriers transmitting data, wherein the downlink component carriers include at least one scheduled component carrier and/or at least one unscheduled component carrier;

An execution unit, configured to execute corresponding operations according to the feedback status.

A communication system, the system includes a base station and user equipment, the user equipment includes a feedback device for multi-carrier response information, the base station is used to send multiple downlink component carriers to the user equipment, the downlink component The carrier includes at least one scheduled component carrier and/or at least one unscheduled component carrier, and receiving response information to be transmitted, the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier; according to the response information to be transmitted A mapping relationship with the feedback state, analyzing the response information to be transmitted to obtain the feedback state, and performing corresponding operations according to the feedback state;

The user equipment is configured to use the means for feedbacking the multi-carrier response information to determine a feedback state for the response information according to the response information for the component carriers, and the feedback state includes at least a first state and a second state. Two states, the first state indicates that only the data transmitted on all the predetermined component carriers has been received and the acknowledgment information is fed back to all the predetermined component carriers, and the second state indicates that at least one unscheduled component carrier has received transmit data without data loss, and feed back acknowledgment information to all component carriers of the data transmission; generate response information to be transmitted according to the feedback status, and send the response information to be transmitted to the base station.

The technical solution provided by the embodiment of the present invention provides a new technical solution for feeding back response information corresponding to data transmission of multiple downlink component carriers in the same uplink component carrier in the scenario where the carrier aggregation technology is adopted in the communication system. In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flow chart of a method for feeding back multi-carrier response information provided by an embodiment of the present invention;

Figure 2 shows a schematic diagram of sending response information to be transmitted based on the PUCCH format of DFT-S-OFDM;

FIG. 3 is a structural diagram of a feedback device for multi-carrier response information provided by another embodiment of the present invention;

4(a) to 4(d) are structural diagrams of another feedback device for multi-carrier response information provided by another embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a communication system provided by another embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

A method for feeding back multi-carrier response information provided by an embodiment of the present invention, see FIG. 1, the method includes:

Step 11: Determine a feedback state for the response information according to the response information generated by each component carrier, where the feedback state includes at least a first state and a second state.

In the LTE-A carrier aggregation system, when a user equipment (User Equipment, UE) accesses multiple downlink component carriers at the same time, if the data transmission for the UE is received on the PDSCH of a component carrier and the reception is correct, or the received Indicates the DCI of the downlink semi-persistent scheduling (Semi-persistent Scheduling, SPS) termination (Release), and generates an acknowledgment (ACK) response message for the component carrier; if the data transmission for the UE is received on the PDSCH of a component carrier but is received incorrectly, Generate a negative (NACK) response message for the component carrier; if no data transmission is received on the PDSCH of a component carrier, and no DCI indicating downlink semi-persistent scheduling (Semi-persistent Scheduling, SPS) termination (Release) is received, No response information is generated for the component carrier, which is denoted as generated response information DTX. For the convenience of description, in the case of no confusion, below, the fact that the UE receives the data transmission addressed to it on the PDSCH of a component carrier is briefly referred to as the UE receiving the PDSCH transmission on a component carrier.

The at least one predetermined component carrier may be a downlink primary component carrier, or the at least one predetermined component carrier is a first component carrier, and the downlink control information DCI corresponding to the first component carrier is configured to be transmitted on the downlink primary component carrier, At this time, the DCI corresponding to the PDSCH on the first component carrier is transmitted by the downlink primary component carrier, and the first component carrier may be one or more, or the at least one predetermined component carrier includes both the downlink primary component carrier and the first component carrier. Wherein, in the LTE-A carrier aggregation system, when multiple component carriers are configured for the user equipment, a downlink primary component carrier may be defined for radio link failure monitoring and system information update of the user equipment. Using the component carriers other than the scheduled component carriers among the above-mentioned multiple component carriers transmitted at the same time as unscheduled component carriers,

In the embodiment of the present invention, the scenario of feedback information feedback of the LTE-A carrier aggregation system is mainly used as an example for illustration, but the principle of the present invention is applicable to all carrier aggregation systems. In addition, if not specifically limited, downlink control information (Downlink Control Information, DCI) includes DCI used to indicate PDSCH transmission or downlink SPS termination.

The above-mentioned first state indicates that only all the data transmitted on the predetermined component carrier (including PDSCH and DCI for SPS termination) are received and the confirmation response information is fed back to the predetermined component carrier, and the second state indicates that the received For data transmitted on at least one unscheduled component carrier, no data loss is found, and acknowledgment information is fed back to all received component carriers transmitting data.

The response information according to the component carrier in the above steps may include confirmation response information generated for the component carrier, negative response information generated for the component carrier and no response information generated for the component carrier.

Further, in order to accurately feed back the response information, the embodiment of the present invention may confirm whether all component carriers of the current subframe are received through the indicator field carried in the component carrier, for example, carry the indicator field in the DCI of the unscheduled component carrier , when it is known according to the indication field that all component carriers that have transmitted data are received and all acknowledgment response information is fed back to the component carriers, then it is determined that the feedback state of the response information is the second state.

Step 12: Generate response information to be transmitted according to the feedback status and send the response information to be transmitted in the uplink direction.

The technical solution provided by the embodiment of the present invention provides a new technical solution for feeding back response information corresponding to data transmission of multiple downlink component carriers in the same uplink component carrier in the scenario where the carrier aggregation technology is adopted in the communication system. In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

In particular, the embodiments of the present invention provide a new multi-carrier response information feedback and transmission scheme for the scenario where the user equipment receives multiple downlink component carriers in the same subframe in the FDD system.

A method for feeding back multi-carrier response information provided by another embodiment of the present invention will be described in detail below.

Step S1: Receive data transmitted on each downlink component carrier of the current subframe.

The UE receives the data transmitted on the downlink component carrier from the base station. In order to ensure correct feedback on the response information, the base station needs to carry the Downlink Assignment Index (DAI) field in the DCI of the component carrier to help the user equipment detect whether There is DCI loss, so as to prevent the user equipment from feeding back response information by mistake when there is DCI loss.

In LTE Time Division Duplex (Time Division Duplex, TDD) system, DCI contains an independent DAI command field, and the DAI command field is used to indicate the set of associated downlink subframes allocated to the UE until the currently received downlink subframe Cumulative number of DCIs. However, in the LTE-A FDD system, there is no independent DAI command field in the DCI, and the correct feedback of the response information of multiple component carriers cannot be made according to the DAI command field in the existing DCI. Therefore, the embodiment of the present invention proposes a new multi-carrier response information feedback scheme, which can be applied in both the FDD system and the TDD system.

When implementing the above indication field, the embodiment of the present invention deeply analyzes the characteristics of the carrier aggregation system, and finds that in the DCI corresponding to each downlink component carrier configured to feed back response information on the same uplink component carrier for a UE, in the same subframe Having the same transmission power control (Transmission Power Control, TPC) command field, it is redundant for the system to send the same TPC command field. Therefore, the redundant TPC command field can be used to indicate the DAI field. This implementation method does not need to add extra bits to the DCI, fully utilizes existing system resources, and improves resource utilization.

For the LTE-AFDD system, in order to ensure that the original function of the TPC command field will not be lost, among the multiple component carriers simultaneously sent to the UE, the embodiment of the present invention first sets one or more predetermined component carriers, such as the downlink primary component carrier Or the first component carrier, the downlink control information DCI corresponding to the first component carrier is configured to be transmitted on the downlink primary component carrier, the TPC command field of the predetermined component carrier DCI has not been changed, and it is still interpreted as a TPC command word, realizing TPC The original function of the command field; among the multiple component carriers transmitted at the same time, the component carriers other than the scheduled component carrier are regarded as unscheduled component carriers, and the TPC command field in the DCI of the unscheduled component carrier is reinterpreted as the DAI field . Different from the LTE TDD system, the DAI command word interpreted by the TPC command field in the embodiment of the present invention indicates the total amount of DCI allocated to the terminal by each component carrier in the current subframe. According to any received DAI field, the UE can know the total number of component carriers for all data transmission transmitted by the base station to the UE in the current subframe.

It can be seen that the above processing method is to make the TPC command field of the LTE-AFDD system DCI into a common field, and the common field transmits DCI on at least one pre-designated component carrier (such as the downlink main component carrier or configured on the downlink main component carrier) The DCI corresponding to the CC) is interpreted as a TPC command word, and the DCI corresponding to the remaining component carriers is interpreted as a DAI command word.

It can be understood that when the technical solution of the embodiment of the present invention is applied to a TDD system, it is necessary to set the DAI command word in the DCI of the unscheduled component carrier in the system to the total number of DCI allocated to the terminal in the current subframe.

Step S2: Determine the feedback status of the response information according to the response information of each component carrier.

When the UE receives the data transmission for the UE on the PDSCH of a component carrier and the reception is correct, or receives the DCI indicating the termination of the downlink SPS, it generates an acknowledgment message for the component carrier; when the UE receives the data transmission on the PDSCH of a component carrier When the data transmission to the UE is received but the reception is wrong, a negative response message is generated for the component carrier; if no data transmission is received on the PDSCH of a component carrier, no indication is received for downlink Semi-persistent Scheduling (Semi-persistent Scheduling, SPS) DCI that is terminated (Release) does not generate response information for the component carrier, and is recorded as generated response information DTX. For the convenience of description, in the case of no confusion, below, the fact that the UE receives the data transmission addressed to it on the PDSCH of a component carrier is briefly referred to as the UE receiving the PDSCH transmission on a component carrier.

The response information according to each component carrier in step S2 includes the confirmation response information generated for the component carrier, the negative response information generated for the component carrier and the non-generated response information for the component carrier.

Since 1 or 2 bits have been allocated in the LTE-A system to transmit the feedback of the response information to the base station, in order to make full use of existing network resources, the embodiment of the present invention can ensure that multiple The feedback of response information of each component carrier is transmitted to the base station in 1 or 2 bits, and this processing method improves the utilization rate of existing network resources.

In the embodiment of the present invention, the above-mentioned feedback state includes at least a first state and a second state, the first state indicates that only the data transmitted on all the predetermined component carriers is received and all feedback acknowledgments are made to the predetermined component carriers information, expressed as ACK0 state; the second state indicates that when at least one unscheduled component carrier is received, and there is no data loss, and all component carriers are fed back acknowledgment response information, expressed as ACK1 state, all member carriers A carrier is a component carrier for transmitting data.

But it is not limited thereto, and the content indicated by the feedback status and the number of the feedback status can be set according to actual needs or the feedback capability of the network. For example, when more accurate feedback information is actually required or the network has a strong feedback capability, the content indicated by the above feedback status can be more detailed, and the number of feedback statuses can be more. The feedback status is transmitted to the base station; when the accuracy of the feedback information is not high or the feedback capability of the network is limited, the content of a feedback status indication can be summarized, and the number of feedback statuses can be less.

Wherein, for the second state above, in order to ensure that the UE can know whether it has received all the component carriers used for data transmission sent by the base station in the current subframe, and whether the UE has responded to all the component carriers used for data transmission, the embodiment of the present invention An indication field is carried in the component carrier, and the indication field indicates the total number of DCIs sent by the base station to the UE in the current subframe.

In the technical solution of the embodiment of the present invention, in addition to the above-mentioned first state (ACK0 state) and second state (ACK1 state), the setting of the feedback state of the UE is exemplarily described, including at least the following four situations:

the first case,

In this case, in addition to the first state (ACK0 state) and the second state (ACK1 state) described above, a third state (NACK state) and a fourth state (DTX ₀ state) are included.

Wherein, when generating negative response information for any component carrier among the received component carriers, it is determined that the feedback state of the response information is the third state, which is represented as a NACK state; Data transmission on the carrier, and when it is confirmed that data loss occurs in the current subframe according to the indication field (such as the TPC command field in the DCI), it is determined that the feedback state of the response information is the fourth state, which is represented as the DTX ₀ state.

the second case,

In this case, a fifth state (NACK1 state) is included in addition to the first state (ACK0 state) and the second state ( _ACK1 state) described above.

When generating negative acknowledgment information for any of the received component carriers, or for receiving data transmission on at least one unscheduled component carrier, and confirming the current When data loss occurs in a subframe, it is determined that the feedback state of the response information is the fifth state, which is represented as the NACK ₁ state. It can be seen that the content of this state indication is relatively general, including the NACK state and the NACK state in the first case. DTX ₀ state.

The third case,

In this case, in addition to the above-mentioned first state (ACK0 state) and second state (ACK1 state), a sixth state (NACK 2 state) and a seventh state (ACK2 state) are included.

Wherein, when generating negative acknowledgment information for all received component carriers, or for receiving data transmission on at least one unscheduled component carrier, and according to the indication field (such as the TPC command field in DCI ) confirming that data loss occurs in the current subframe, determining that the feedback state of the response information is the sixth state, represented as the NACK2 state,

For receiving data transmission on at least one non-scheduled component carrier, and confirming that all component carriers in the current subframe are received according to the indication field, if negative response information is generated for any of the predetermined component carriers or no response information is fed back, And when acknowledgment information is generated for all unscheduled component carriers, it is determined that the feedback state of the response information is the seventh state, which is represented as the ACK2 state.

The fourth case,

In this case, an eighth state (NACK0 state) and a ninth state (NACK1 state) are included in addition to the above-described first state (ACK0 state) and second state (ACK1 state).

When the indication field (such as the TPC command field in DCI) is not received in the unscheduled component carrier and negative response information is generated for the scheduled component carrier, or, the indication field is received in the unscheduled component carrier and detected When data loss occurs, it is determined that the feedback state to the response information is the eighth state, expressed as NACK0 state;

When the indication field is not received in the unscheduled component carrier and no acknowledgment information is generated for the scheduled component carrier, or, when the indication field is received in the unscheduled component carrier but negative response information is generated for the scheduled component carrier, then It is determined that the feedback state of the response information is a ninth state, which is represented as a NACK1 state.

Since the non-predetermined component carriers used to transmit data to the UE all contain DCI, and the embodiment of the present invention sets an indication field for the DCI, when determining the eighth state and the ninth state, it can also be described as follows:

When DCI is not received in the unscheduled component carrier and negative response information is generated for the scheduled component carrier, or, when DCI is received in the unscheduled component carrier and data loss is detected, it is determined to respond to the response The information feedback state is the eighth state;

When no DCI is received in the unscheduled component carrier and no acknowledgment information is generated for the scheduled component carrier, or, when DCI is received in the unscheduled component carrier but negative response information is generated for the scheduled component carrier, it is determined to The feedback state of the response information is the ninth state.

The DAI command field in the DCI may be used in the following manner to determine whether DCI loss occurs, that is, whether data loss occurs. The UE receives multiple component carriers in the current subframe, and each component carrier is configured with its own DCI, obtains the DAI command word in the DCI (interpreted as the DAI command word by the common field), and calculates the number of received DCIs (that is, received The number of received component carriers) is compared with the count value indicated by the DAI command word. If they are the same, it means that the DCI is not lost, and the UE has received all the component carriers carrying the UE data in the current subframe. If the received DCI quantity is less than the count value indicated by the DAI command word, DCI loss is detected, and the UE has not received all component carriers in the current subframe.

When the UE does not receive the DAI command word, at this time, the base station may only send the downlink data packet to the UE through the predetermined component carrier, or it may lose all the non-predetermined component carriers during the transmission of the downlink data packet, and the UE cannot according to the The DAI command word judges whether the DCI is lost. However, since the UE can know the predetermined component carriers and their number, the UE can respond to the predetermined component carriers and obtain the feedback status of the predetermined component carriers. For example, when all the predetermined component carriers have confirmed the response information, the feedback status is ACK0 state. Therefore, differentiating and indicating the two states of ACK0 and ACK1, when feeding back the states to the base station, helps the base station detect whether the UE has lost all the DCI sent including the DAI command word.

In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

Select the above-mentioned feedback status according to the feedback capability of the network. For example, when the network sends the feedback status to the base station through 2 bits in the response information to be transmitted, select 2, 3 or 4 feedback statuses and define a table in advance. The need indication maps each state to 2 bits b(0)b(1). For example, it is determined that the feedback state is the above-mentioned first case, and the first case includes the first state, the second state, the third state and the fourth state, that is, when the ACK0 state, the ACK1 state, the NACK state and the DTX ₀ state, according to this The four feedback states respectively generate different response information to be transmitted, and map the response information to be transmitted into one of the following combinations: 00, 11, 10, 01. A mapping table may be formed from the obtained mapping results, for example, a defined mapping table may be as shown in Table 1.

Table 1

Feedback Status Descriptor character b(0), b(1) first state ACK0 0,0 Second state ACK1 1,1 third state NACK 1,0 Fourth state DTX ₀ 0, 1

Step S3: Generate response information to be transmitted according to the feedback status and send the response information to be transmitted in the uplink direction. Specifically, the response information to be transmitted can be generated through the following operations according to a predetermined mapping relationship, the mapping relationship defines the corresponding relationship between the response information to be transmitted in the feedback state and 0, 1 or a combination thereof:

Generate 1-bit response information to be transmitted according to the first state and the second state, wherein the response information to be transmitted corresponding to the first state is mapped to 0, and the response information to be transmitted corresponding to the second state is mapped to 1, or, the response information to be transmitted corresponding to the first state is mapped to 1, and the response information to be transmitted corresponding to the second state is mapped to 0; or,

Generate 2-bit response information b(0)b(1) to be transmitted respectively according to the first state and the second state, wherein the response information b(0)b(1) to be transmitted corresponding to the first state and The response information b(0)b(1) to be transmitted corresponding to the second state is different and mapped to one of the following combinations: 00, 11, 10, 01; or,

According to the first state, the second state, the third state and the fourth state, respectively generate 2-bit to-be-transmitted response information b(0)b(1), wherein the to-be-transmitted response information b corresponding to the first state (0)b(1), the response information to be transmitted corresponding to the second state b(0)b(1), the response information to be transmitted corresponding to the third state b(0)b(1), and the The response information b(0)b(1) to be transmitted corresponding to the fourth state is different and mapped to one of the following combinations: 00, 11, 10, 01; or,

Generate 2-bit response information to be transmitted b(0)b(1) respectively according to the first state, the second state and the fifth state, wherein the response information to be transmitted corresponding to the first state b(0)b (1) The response information b(0)b(1) to be transmitted corresponding to the second state and the response information b(0)b(1) to be transmitted corresponding to the fifth state are different and mapped as follows One of the above combinations: 00, 11, 10, 01; or,

Generate 2-bit response information b(0)b(1) to be transmitted according to the first state, the second state, the sixth state and the seventh state, wherein the response information b to be transmitted corresponding to the first state (0)b(1), the response information to be transmitted corresponding to the second state b(0)b(1), the response information to be transmitted corresponding to the sixth state b(0)b(1), and the The response information b(0)b(1) to be transmitted corresponding to the seventh state is different and mapped to one of the following combinations: 00, 11, 10, 01; or,

According to the first state, the second state, the eighth state and the ninth state, respectively generate 2-bit to-be-transmitted response information b(0)b(1), wherein the to-be-transmitted response information b corresponding to the first state (0)b(1), the response information to be transmitted corresponding to the second state b(0)b(1), the response information to be transmitted corresponding to the eighth state b(0)b(1), and the The response information b(0)b(1) to be transmitted corresponding to the ninth state is different and mapped to one of the following combinations: 00, 11, 10, 01.

After the above-mentioned response information to be transmitted is generated, the response information to be transmitted is sent in an uplink direction. For example, referring to Table 1, the response information to be transmitted may be generated according to the feedback status, and the response information to be transmitted may be carried in a corresponding uplink channel with 2 bits and sent to the uplink direction (such as the base station).

Furthermore, the embodiment of the present invention can also realize simultaneous transmission of UE's feedback on response information and other uplink information in an LTE-A carrier aggregation scenario.

Specifically, after the UE multiplexes the response information to be transmitted and the uplink information, the multiplexed information is sent in the uplink direction on the channel for transmitting the uplink information. Correspondingly, at this time, the base station receives the above-mentioned multiplexed information.

When the response information and the uplink information need to be transmitted at the same time, the UE will carry 2-bit response information b(0)(1) to be transmitted on the channel of the uplink information. The following is an example of a scenario where the above-mentioned uplink information is positive (positive) Scheduling Request Indicator (SRI) information, channel state information (Channel State Information, CSI) or uplink data information.

If the above uplink information is forward SRI information, the UE can use the same method in LTE release 8/9 on the SR channel, that is, use the PUCCH format 1a/1b to transmit 2-bit information b(0)(1) on the SR channel. Wherein, the SRI channel refers to the PUCCH channel for the user equipment to feed back scheduling request indication information to the base station.

If the above uplink information is CSI information, for example, in LTE release 8/9, Channel Quality Indicator (CQI) information, Precoding Matrix Indicator (Precoding Matrix Indicator, PMI) information, or (Rank Indicator, RI) information in For one or more types of information, the UE can modulate the 2-bit response information b(0)(1) to be transmitted into Quadrature Phase Shift Keying (QPSK) in the PUCCH format used to transmit CSI information on the CSI channel. , QPSK) symbols, carried on one of the pilot symbols for transmission.

Wherein, the CSI channel refers to the PUCCH channel for the user equipment to feed back channel state information to the base station.

The PUCCH format mentioned above can be the PUCCH format 2/2a/2b in LTE release 8/9, or it can be a new transmission format that may be introduced by LTE-A, such as discrete Fourier-spread spectrum-orthogonal frequency division multiplexing (Discrete Fourier Transform-Spreading-Orthogonal Frequency Division Multiplexing, DFT-S-OFDM) format. Figure 2 shows an example of using the DFT-S-OFDM format PUCCH channel to simultaneously transmit CSI information and response information to be transmitted. Figure 2 only shows the main functional modules in this scenario, such as Channel Encoding (Channel Encoding) module, Cell-Specific Scrambling (Cell-SpecificScrambling) module, modulation (Modulation) module, offline Fourier Transform (Discrete FourierTransform, DFT) module and inverse Fourier Transform (Inverse Discrete Fourier Transform, IFFT) module, wherein, each time slot (Slot) It consists of 7 symbols, the second and sixth symbols are pilot symbols, and the remaining five symbols can be used for the transmission of the response information to be transmitted, and a spreading sequence with a length of 5 is used to transmit the response information in the Spreading is carried out within 5 symbols, as shown in Figure 2, the spreading factor (Spreading Factor, SF) is 5, and the spreading sequence is {w0, w1, ..., w4}.

The UE can also put the 2-bit response information b(0)(1) and the bit information of the CSI together according to a preset rule, and then encode them jointly. The bit information generated after encoding is transmitted with LTE release 8/9 PUCCH format 2/2a/2b or a new transmission format that may be introduced by LTE-A, such as DFT-S-OFDM format.

If the uplink information is uplink data, the 1-bit or 2-bit response information to be transmitted can be multiplexed together with the uplink data and transmitted on the PUSCH according to a preset rule.

The technical solution provided by the embodiment of the present invention provides a new technical solution for feeding back response information corresponding to data transmission of multiple downlink component carriers in the same uplink component carrier in the scenario where the carrier aggregation technology is adopted in the communication system. In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

In particular, the embodiments of the present invention provide a new multi-carrier response information feedback and transmission scheme for the scenario where the user equipment receives multiple downlink component carriers in the same subframe in the FDD system.

Another embodiment of the present invention also provides a method for simultaneously sending response information to be transmitted and other uplink information under carrier aggregation, including:

Step T1: Allocate first channel resources for feeding back response information to be transmitted, and allocate second channel resources for feeding back corresponding uplink control information. The uplink control information includes forward SRI information and/or CSI information, but is not limited thereto, and also includes other required control information in the uplink direction.

In the above step 12, for the response information of multiple component carriers accessed by the user equipment, the response information to be transmitted after the logical AND operation is fed back. At this time, when there is negative response information in the response information, the response information to be transmitted obtained through the logical AND operation is fed back as negative response information. At this time, for those component carriers that have been correctly received, some unnecessary PDSCH retransmissions will be introduced . In order to avoid logical AND operations on the response information of multiple component carriers, another possible way is to jointly encode the response information of multiple component carriers, and use, for example, LTE Release 8/9 PUCCH format 2/2a/2b channels or DFT -S-OFDM format channel for transmission.

For the convenience of description, the LTE Release 8/9 PUCCH format 1/1a/1b channel is called the basic response channel; the LTE Release 8/9 PUCCH format 2/2a/2b channel or the DFT-S-OFDM channel is called the extended response channel. The basic acknowledgment channel can only feed back a small amount of acknowledgment information to be transmitted, such as 1 to 2 bits; the extended acknowledgment channel can feed back a large amount of acknowledgment information to be transmitted, such as a maximum of 10 to 20 bits.

Considering that an extended acknowledgment channel occupies more resources than a basic acknowledgment channel, in order to minimize the channel resource overhead occupied by the feedback acknowledgment information, allocating the first channel resource for feeding back the acknowledgment information to be transmitted further includes: when the user equipment When it is only necessary to feed back the response information to be transmitted to at least one predetermined component carrier, the allocation of the first channel resource is to allocate basic response channel resources; when the user equipment needs to feed back the response to be transmitted to at least one component carrier other than the predetermined component carrier information, the allocating the first channel resource is allocating the extended response channel resource. When the extended acknowledgment channel resource is allocated, the user equipment feeds back the acknowledgment information of all component carriers including the predetermined component carrier on the allocated extended response channel.

In the LTE-A carrier aggregation technology, when multiple component carriers are configured for the user equipment, one downlink primary component carrier and one uplink primary component carrier may also be defined for the user equipment. The downlink primary component carrier can be used for radio link failure monitoring and system information update of user equipment. The uplink primary component carrier can be used for user equipment to feed back uplink control information. The DCI transmitted by a downlink component carrier may indicate the PDSCH transmission of this downlink component carrier or the PDSCH transmission of other downlink component carriers. For a downlink component carrier, if a basic acknowledgment channel is reserved for the DCI transmitted by the uplink main component carrier, the downlink component carrier is called a downlink component carrier associated with the uplink main component carrier system. The predetermined component carrier is a downlink primary component carrier, or a component carrier configured to transmit DCI on the downlink primary component carrier, or a downlink component carrier associated with the uplink primary component carrier system.

When receiving DCI and PDSCH transmission only on the predetermined component carrier, the user equipment only needs to feed back the response information to be transmitted to the predetermined component carrier; or, indicate the user equipment in a certain way (for example, adding 1 bit) in the DCI Whether it is only necessary to feed back the response information to be transmitted to the predetermined component carrier at present, at this time, it can also be indicated indirectly by indicating whether the allocated first channel is a basic response channel or an extended response channel. Feedback the response information to be transmitted.

The uplink control information includes forward SRI information and/or CSI information. When the uplink control information includes forward SRI information, the allocating second channel resources includes allocating SR channel resources; when the uplink control information includes CSI information, allocating second channel resources includes allocating CSI channel resources. For the LTE-A system, the SR channel can be the LTE Release 8/9 PUCCH format 1/1a/1b channel, and the CSI channel can be the LTE Release 8/9 PUCCH format 2/2a/2b channel or the DFT-S-OFDM channel.

When the user equipment only feeds back the response information to be transmitted, send the response information to be transmitted in the allocated first channel resource; when the user equipment only feeds back the forward SRI information, send the forward SRI information in the allocated SR channel resource; when the user equipment When only CSI information is fed back, the CSI information is sent on allocated CSI channel resources.

Step T2: When the user equipment only needs to feed back the response information to be transmitted to at least one predetermined component carrier and simultaneously feeds back the uplink control information, multiplex the response information to be transmitted and the uplink control information on the second channel Sending on resources; when the user equipment needs to feed back the response information to be transmitted to at least one component carrier other than the predetermined component carrier and feed back the uplink control information at the same time, multiplex the response information to be transmitted and the uplink control information Then send on the first channel resource.

As mentioned above, when only the predetermined component carrier receives DCI and PDSCH transmission, or when the DCI indicates that only the predetermined component carrier needs to feed back the acknowledgment information to be transmitted, the user equipment only needs to The carrier feeds back the response information to be transmitted.

For the LTE-A system, when the user equipment only needs to feed back the response information to be transmitted to the predetermined component carrier and feed back the uplink control information at the same time, the response information to be transmitted and the uplink The control information is multiplexed and sent on the second channel resource. If the uplink control information is forward SRI information, then the response information to be transmitted can be sent directly on the allocated SR channel resource; if the uplink control information is CSI information, then the response information to be transmitted can be placed on the allocated CSI channel Send it on the pilot symbol of the resource, or send the response information to be transmitted and the CSI information jointly encoded and then send it on the allocated CSI channel resource; if the uplink control information includes forward SRI information and CSI information at the same time, the CSI information may not be sent, The response information to be transmitted is directly sent on the allocated SR channel resources. At this time, the basic acknowledgment channel resource allocated for feeding back the acknowledgment information to be transmitted is vacant.

When the user equipment needs to feed back the response information to be transmitted to at least one component carrier other than the predetermined component carrier and simultaneously feed back the uplink control information, multiplex the response information to be transmitted and the uplink control information in a certain way Then send on the first channel resource. If the uplink control information is forward SRI information, the SRI information can be sent on the pilot symbol of the allocated first channel resource, or the SRI information and the response information to be transmitted can be jointly encoded on the allocated first channel resource Sending; if the uplink control information is CSI information, the response information to be transmitted and the CSI information can be jointly encoded and sent on the allocated first channel resource, or the response information to be transmitted can be logically ANDed to obtain 1-bit to 2-bit The response information to be transmitted is sent on the pilot symbol of the allocated first channel resource, and at the same time, the CSI information is encoded and sent on the allocated first channel resource; if the uplink control information contains forward SRI information and CSI information at the same time , the CSI information may not be sent, the forward SRI information and response information may be multiplexed and then sent on the allocated first channel resource, or the SRI information, response information and CSI information may be jointly encoded and then sent on the allocated first channel resource . At this time, the second channel resource allocated for feeding back the uplink control information is not used.

An embodiment of the present invention provides a method for simultaneously sending response information to be transmitted and other uplink control information under carrier aggregation. By adopting the method of the embodiment of the present invention, when the basic acknowledgment channel format and the extended acknowledgment channel format can be used when feeding back the acknowledgment information to be transmitted, it can effectively support the user equipment to simultaneously send the acknowledgment information to be transmitted and other uplink control information. At the same time, some error situations caused by the user equipment losing DCI of at least one component carrier other than the predetermined component carrier can also be effectively handled, for example, without retransmitting correctly received data to the UE.

Another embodiment of the present invention provides a method for feeding back multi-carrier response information, the method comprising:

1: Receive response information to be transmitted, where the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier.

Further, when the response information to be transmitted and the uplink information are multiplexed and transmitted on the channel of the uplink information at the same time, the uplink information and the response information to be transmitted will be received at the same time. At this time, it is necessary to For a specific multiplexing mode (such as the multiplexing mode in step S3 above), corresponding separation is obtained to obtain the response information to be transmitted.

2: According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, the feedback state includes at least a first state and a second state, and the first state Indicates that only the data transmitted on all the predetermined component carriers is received and acknowledgment information is generated for all the predetermined component carriers, and the second state indicates that the data transmitted on at least one non-scheduled component carrier is received and there is no data loss , and generate acknowledgment information for all component carriers that transmit data, where each downlink component carrier includes at least one scheduled component carrier and/or at least one unscheduled component carrier.

For the mapping relationship between the response information to be transmitted and the feedback status, please refer to the specific mapping manner in the above step S3.

Further, according to the mapping relationship between the response information to be transmitted and the feedback state, the response information to be transmitted is analyzed to obtain the feedback state, and the feedback state includes the first state, the second state, the third state and the first state. Four states; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, where the feedback state includes a first state, a second state, and a fifth state; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, and the feedback state includes a first state, a second state, a sixth state, and a seventh state; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, and the feedback state includes a first state, a second state, an eighth state, and a ninth state; For the specific meanings of the third state to the ninth state, please refer to the above step S3.

3: Perform corresponding operations according to the feedback status.

The operations here mainly include resending the corresponding data to the terminal through the downlink component carrier if there is an error in the current data transmission; or performing subsequent data transmission if the current data transmission is successful. For example, when it is known that the feedback state is the first state, if the base station transmits data to the terminal only through the predetermined component carrier, the current data transmission is successful, and the subsequent data transmission is performed; If the carrier transmits data to the terminal, it means that there is an error in the data transmission on the unscheduled component carrier. If there is data loss or data abnormality, the base station will resend the data transmitted on the unscheduled component carrier to the terminal.

In the embodiment of the present invention, the base station can know the feedback status of the terminal to the response information of the downlink component carrier in time through the received response information to be transmitted in the carrier aggregation scenario, and perform subsequent operations. . In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

Corresponding to the foregoing embodiments, a base station is also provided, including:

The receiving unit is configured to receive response information to be transmitted, the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier;

An analysis unit, configured to analyze the response information to be transmitted to obtain the feedback status according to the mapping relationship between the response information to be transmitted and the feedback status, the feedback status includes at least a first status and a second status, the The first state indicates that only the data transmitted on all the predetermined component carriers is received and the acknowledgment information is generated for all the predetermined component carriers, and the second state indicates that the data transmitted on at least one non-scheduled component carrier is received and not There is data loss, and generating acknowledgment information for all the component carriers transmitting data, wherein the downlink component carriers include at least one scheduled component carrier and/or at least one unscheduled component carrier;

An execution unit, configured to execute corresponding operations according to the feedback status.

Further, the receiving unit is specifically configured to receive the response information to be transmitted simultaneously with the uplink information from the uplink information channel, the uplink information including forward SRI information, CSI information or uplink data information at least one of .

Further, the parsing unit is further configured to parse the response information to be transmitted to obtain the feedback state according to the mapping relationship between the response information to be transmitted and the feedback state, and the feedback state includes a first state, a second state, and a second state. Second state, third state and fourth state; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, where the feedback state includes a first state, a second state, and a fifth state; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, and the feedback state includes a first state, a second state, a sixth state, and a seventh state; or,

According to the mapping relationship between the response information to be transmitted and the feedback state, analyze the response information to be transmitted to obtain the feedback state, and the feedback state includes a first state, a second state, an eighth state, and a ninth state;

Wherein, when negative response information is generated for any component carrier among the received component carriers, it is determined that the feedback state of the response information is the third state;

When receiving data transmission on at least one unscheduled component carrier and confirming that data loss occurs in the current subframe according to the indication field in the unscheduled component carrier, determine that the feedback state of the response information is the fourth state;

When generating negative acknowledgment information for any of the received component carriers, or for receiving data transmission on at least one unscheduled component carrier, and confirming that the current subframe occurs according to the indication field in the unscheduled component carrier When data is lost, determine that the feedback state of the response information is the fifth state;

When generating negative acknowledgment information for all received component carriers, or receiving data transmission on at least one unscheduled component carrier, and confirming that the data in the current subframe occurs according to the indication field in the unscheduled component carrier When it is lost, it is determined that the feedback state of the response information is the sixth state;

For receiving data transmission on at least one unscheduled component carrier, and confirming that all component carriers in the current subframe are received according to the indication field in the unscheduled component carrier, if negative response information is generated for any of the predetermined component carriers Or when no response information is fed back, and confirmation response information is generated for all non-scheduled component carriers, determine that the feedback state of the response information is the seventh state;

When the indication field is not received in the unscheduled component carrier and negative response information is generated for the scheduled component carrier, or, when the indication field is received in the unscheduled component carrier and data loss is detected, it is determined that the The feedback state of the response information is the eighth state;

When the indication field is not received in the unscheduled component carrier and no acknowledgment information is generated for the scheduled component carrier, or, when the indication field is received in the unscheduled component carrier but negative response information is generated for the scheduled component carrier, then Determining that the feedback state for the response information is the ninth state.

For the specific working methods of each functional module and unit in the device embodiment of the present invention, refer to the corresponding method embodiment of the present invention. Each functional module and unit in the device embodiment of the present invention can be implemented independently, or integrated in one or more units.

In the embodiment of the present invention, the base station can know the feedback status of the terminal to the response information of the downlink component carrier in time through the received response information to be transmitted in the carrier aggregation scenario, and perform subsequent operations. . In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

Another embodiment of the present invention also provides a device for feedbacking multi-carrier response information, referring to Figure 3, the device includes:

The feedback state determination unit 32 is configured to determine the feedback state of the response information according to the response information of each downlink component carrier, the feedback state includes at least a first state and a second state, and the first state indicates that only the received All the data transmitted on the predetermined component carrier and all the predetermined component carriers feed back acknowledgment response information, the second state indicates that the data transmitted on at least one unscheduled component carrier is received and there is no data loss, and all All the component carriers transmitting data feed back acknowledgment response information, wherein the downlink component carriers include at least one scheduled component carrier and/or at least one unscheduled component carrier;

The feedback sending unit 33 is configured to generate response information to be transmitted according to the feedback state and send the response information to be transmitted in an uplink direction.

In order to ensure that the correct feedback status can be obtained by responding to all component carriers that transmit data, the feedback status determination unit 32 includes a first status determination module 320, configured to receive only the data transmitted on the predetermined component carrier and to All the scheduled component carriers generate acknowledgment response information, and determine that the feedback status of the response information is the first status; and the second status determination module 321 is configured to, according to the received When it is known that there is no data loss in the indication field, and all component carriers that transmit data generate acknowledgment response information, it is determined that the feedback status of the response information is the second status, wherein the at least one unscheduled The component carrier carries an indication field, and the indication field indicates the total number of downlink control information DCI allocated to the terminal in the current subframe.

4(a) to FIG. 4(d), in addition to the first state determination module 320 and the second state determination module 321, the feedback state determination unit 32 also includes a third state determination module 322 and a fourth state determination module 322. Module 323, or, the feedback state determination unit further includes a fifth state determination module 324, or, the feedback state determination unit further includes a fifth state determination module 324 and a sixth state determination module 325, or, the feedback state The determination unit further includes a seventh state determination module 326 and an eighth state determination module 327 .

Wherein, the third state determination module 322 is configured to determine that the feedback state of the response information is the third state when the negative response information is generated for any one of the received component carriers;

The fourth state determination module 323 is configured to determine that the feedback state of the response information is fourth state;

The fifth state determination module 324 is configured to generate negative response information for any of the received component carriers, or for receiving data transmission on at least one unscheduled component carrier, and according to the indication field When confirming that data loss occurs in the current subframe, determine that the feedback state of the response information is the fifth state;

The sixth state determination module 325 is configured to generate negative response information for all received component carriers, or receive data transmission on at least one unscheduled component carrier, and according to the indication field When confirming that data loss occurs in the current subframe, determine that the feedback state of the response information is the sixth state;

The seventh state determination module 326 is configured to receive data transmission on at least one unscheduled component carrier, and confirm that all component carriers of the current subframe are received according to the indication field, if any of the predetermined component carriers When the carrier generates negative response information or does not feed back response information, and generates confirmation response information for all non-scheduled component carriers, determine that the feedback state of the response information is the seventh state;

The eighth state determination module 327 is configured to receive an indication field in the unscheduled component carrier and generate negative response information for the scheduled component carrier when the indication field is not received in the unscheduled component carrier, or receive the indication field in the unscheduled component carrier and When it is detected that data loss occurs, it is determined that the feedback state of the response information is the eighth state;

The ninth state determination module 328 is configured to receive the indication field in the unscheduled component carrier and not generate response information for the scheduled component carrier, or receive the indication field in the unscheduled component carrier but When negative acknowledgment information is generated for the predetermined component carrier, it is determined that the feedback state of the acknowledgment information is the ninth state.

Further, the feedback sending unit 33 is specifically configured to, after multiplexing the response information to be transmitted and uplink information, send the multiplexed information in an uplink direction on the channel for transmitting the uplink information. For example, when the uplink information is forward scheduling request indication SRI information, the feedback sending unit 33 multiplexes the response information to be transmitted and the SRI information carried by 1 bit or 2 bits, and then multiplexes the The information is sent in the uplink direction on the channel for transmitting the SRI information;

When the uplink information is channel state CSI information, the feedback sending unit 33 modulates the to-be-transmitted response information carried by 1 bit or 2 bits into a quadrature phase shift keying QPSK symbol and carries it in one of the CSI information After the pilot symbol is uploaded, send it in the uplink direction on the channel for transmitting the CSI information; or, carry out the response information to be transmitted carried by 1 bit or 2 bits and the CSI information together according to a predetermined rule Joint encoding, sending the encoded information in the uplink direction on the channel for transmitting the CSI information;

When the uplink information is uplink data information, the feedback sending unit 33 multiplexes the response information to be transmitted carried by 1 bit or 2 bits and the uplink data information, and transmits the multiplexed information to the The channel of the uplink data information is sent in the uplink direction.

For the specific working methods of each functional module and unit in the device embodiment of the present invention, refer to the corresponding method embodiment of the present invention. Each functional module and unit in the device embodiment of the present invention can be implemented independently, or integrated in one or more units.

The technical solution provided by the embodiment of the present invention provides a new technical solution for feeding back response information corresponding to data transmission of multiple downlink component carriers in the same uplink component carrier in the scenario where the carrier aggregation technology is adopted in the communication system. In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

In particular, the embodiments of the present invention provide a new multi-carrier response information feedback and transmission scheme for the scenario where the user equipment receives multiple downlink component carriers in the same subframe in the FDD system.

Another embodiment of the present invention also provides a communication system. Referring to FIG. 5, the system includes a base station 51 and a user equipment 52, and the user equipment 52 includes a feedback device 521 for multi-carrier response information,

The base station 51 is configured to send multiple downlink component carriers to the user equipment in the same subframe, the downlink component carriers include at least one scheduled component carrier and/or at least one unscheduled component carrier, and receive the Response information, the response information to be transmitted indicates the feedback status of the terminal to each downlink component carrier; according to the mapping relationship between the response information to be transmitted and the feedback status, analyze the response information to be transmitted to obtain the feedback status, and Execute corresponding operations according to the feedback state;

The user equipment 52 is configured to use the feedback means 521 for multi-carrier response information to determine a feedback state for the response information according to the response information of each component carrier, and the feedback state includes at least a first state and In the second state, the first state indicates that only the data transmitted on all the predetermined component carriers is received and acknowledgment information is generated for all the predetermined component carriers, and the second state indicates that at least one unscheduled component carrier is received Uplink the data to be transmitted without data loss, and generate acknowledgment information for each component carrier that transmits the data; generate response information to be transmitted according to the feedback status, and send the response information to be transmitted to the base station 51 .

For the specific working methods of each functional module and unit in the system embodiment of the present invention, refer to the method embodiment of the present invention. Each of the above devices can be implemented independently, or integrated in one or more devices. For example, the device 32 for feeding back multi-carrier response information may be integrated in the UE or other intermediate network elements.

The technical solution provided by the embodiment of the present invention provides a new technical solution for feeding back response information corresponding to data transmission of multiple downlink component carriers in the same uplink component carrier in the scenario where the carrier aggregation technology is adopted in the communication system. In addition, the technical solution considers that the user equipment has a high probability of correctly receiving data in actual scenarios, and sets the first state and the second state to ensure that the base station can know the success of the data in time through the feedback of the first state and the second state Transmission, subsequent operations, thereby improving the performance of the communication system.

In particular, the embodiments of the present invention provide a new multi-carrier response information feedback and transmission scheme for the scenario where the user equipment receives multiple downlink component carriers in the same subframe in the FDD system.

Another embodiment of the present invention also provides a network device for simultaneously sending response information to be transmitted and other uplink control information under carrier aggregation. The network device includes:

A channel resource allocation unit, configured to allocate first channel resources for feeding back response information to be transmitted, and allocate second channel resources for feeding back corresponding uplink control information, wherein, according to at least one predetermined component carrier and/or at least one unscheduled component carrier in the downlink direction The response information of the component carrier generates the response information to be transmitted;

an information sending unit, configured to multiplex the response information to be transmitted and the uplink control information in the second Sending on channel resources; when the user equipment needs to feed back the response information to be transmitted to at least one component carrier other than the predetermined component carrier and feed back the uplink control information at the same time, the response information to be transmitted and the uplink control information are combined After use, send on the first channel resource.

Further, when the user equipment only needs to feed back the response information to be transmitted to at least one predetermined component carrier, the first channel resource assigned by the channel resource allocation unit is the basic response channel resource; When at least one of the component carriers feeds back the acknowledgment information to be transmitted, the channel resource allocation unit allocates the first channel resource as an extended acknowledgment channel resource.

The foregoing uplink information includes SRI information and/or CSI information. When only the response information to be transmitted is fed back, the information sending unit sends the response information to be transmitted on the allocated first channel resource; when the user equipment only feeds back forward SRI information, the information sending unit transmits the forward SRI information: when the user equipment only feeds back CSI information, the information sending unit sends CSI information in the allocated CSI channel resources.

For the specific working methods of each functional module and unit in the device embodiment of the present invention, refer to the corresponding method embodiment of the present invention. Each functional module and unit in the device embodiment of the present invention can be implemented independently, or integrated in one or more units.

The technical solution of the embodiment of the present invention can effectively support the user equipment to send the response information to be transmitted and other uplink information at the same time when the basic response channel format and the extended response channel format can be used when feeding back the response information to be transmitted. At the same time, some error situations caused by the user equipment losing DCI of at least one component carrier other than the predetermined component carrier can also be effectively handled, for example, without retransmitting correctly received data to the UE.

Those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general hardware platform. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM, disk, The CD, etc., includes several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (19)

1. the feedback method to multicarrier response message, is characterized in that, described method comprises:

According to the response message of each downlink member carrier, determine the feedback states to described response message, described feedback states at least comprises the first state and the second state, described the first state indication only receives the data of transmitting on whole predetermined member carriers and described predetermined member carrier is all generated to confirmation response message, described the second state indication receives the data of transmitting at least one non-predetermined member carrier and does not have loss of data, and each member carrier of described transmission data is all generated to confirmation response message, wherein, described each downlink member carrier comprises at least one predetermined member carrier and/or at least one non-predetermined member carrier,

According to described feedback states, generate response message to be transmitted and in same uplink member carrier, described response message to be transmitted sent to up direction.

2. method according to claim 1, is characterized in that,

Described predetermined member carrier comprises descending main member carrier and/or the first member carrier, and the Downlink Control Information DCI that described the first member carrier is corresponding is configured on descending main member carrier and transmits;

Described non-predetermined member carrier comprises the member carrier except described predetermined member carrier in described each downlink member carrier.

3. method according to claim 1, is characterized in that, described method also comprises:

Through-put power in the DCI of described each downlink member carrier is controlled TPC command field and is set to public field, wherein, in described predetermined member carrier, described public field is interpreted as to TPC command field, described public field is interpreted as to descending distribution indication DAI command field in described non-predetermined member carrier, described DAI command field is indication field, to indicate the sum of the DCI that distributes to terminal.

4. according to the method described in claims 1 to 3 any one, it is characterized in that, described according to the response message of each downlink member carrier, determine the feedback states of described response message is comprised:

According to the indication field in described at least one the non-predetermined member carrier receiving, know and do not have loss of data, and each member carrier of described transmission data is all generated while confirming response message, determine to be described the second state to the feedback states of described response message, wherein, in described at least one non-predetermined member carrier, carry DAI command field as indication field, the sum of the Downlink Control Information DCI of terminal is distributed in described indication field indication.

5. according to the method described in claims 1 to 3 any one, it is characterized in that, described feedback states also comprises the third state and the 4th state, or, described feedback states also comprises the 5th state, or described feedback states also comprises the 6th state and the 7th state, or described state also comprises the 8th state and the 9th state;

Wherein, when the arbitrary member carrier generation in described each member carrier receiving is denied to response message, determine to be the third state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 4th state to the feedback states of described response message;

When arbitrary described each member carrier generation receiving is denied to response message, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 5th state to the feedback states of described response message;

When to described each member carrier receiving, all response message is denied in generation, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 6th state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and confirm to receive all member carriers of current subframe according to the indication field in described non-predetermined member carrier, if arbitrary described predetermined member carrier is generated and denies response message or do not feed back response message, and when all non-predetermined member carriers are all generated to confirmation response message, determine to be the 7th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier generation being denied to response message in described non-predetermined member carrier, or, in described non-predetermined member carrier, receive indication field and detect while there is loss of data, determining to be the 8th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier do not generated to response message in described non-predetermined member carrier, or, when receiving indication field but predetermined member carrier generation being denied to response message in described non-predetermined member carrier, determine to be the 9th state to the feedback states of described response message.

6. method according to claim 5, is characterized in that, describedly according to described feedback states, generates response message to be transmitted and comprises:

According to described the first state and the second state, generate respectively the response message to be transmitted of 1 bit, wherein, the response message to be transmitted that described the first state is corresponding is mapped as 0, the response message to be transmitted that described the second state is corresponding is mapped as 1, or, the response message to be transmitted that the first state is corresponding is mapped as 1, and the response message to be transmitted that described the second state is corresponding is mapped as 0; Or,

According to described the first state and the second state, generate respectively response message b to be transmitted (0) b (1) of 2 bits, wherein, response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that described the first state is corresponding and described the second state are corresponding is not identical and be mapped as a kind of in following combination: 00,11,10,01; Or,

According to described the first state, the second state, the third state and the 4th state, generate respectively response message b to be transmitted (0) b (1) of 2 bits, wherein, response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that described the first state is corresponding, response message b to be transmitted (0) b (1), the described third state that described the second state is corresponding are corresponding and described the 4th state are corresponding is different and be mapped as a kind of in following combination: 00,11,10,01; Or,

According to described the first state, the second state and the 5th state, generate respectively response message b to be transmitted (0) b (1) of 2 bits, wherein, response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that described the first state is corresponding, described the second state are corresponding and described the 5th state are corresponding is different and be mapped as a kind of in following combination: 00,11,10,01; Or,

According to described the first state, the second state, the 6th state and the 7th state, generate respectively response message b to be transmitted (0) b (1) of 2 bits, wherein, response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that described the first state is corresponding, response message b to be transmitted (0) b (1) that described the second state is corresponding, described the 6th state are corresponding and described the 7th state are corresponding is different and be mapped as a kind of in following combination: 00,11,10,01; Or,

According to described the first state, the second state, the 8th state and the 9th state, generate respectively response message b to be transmitted (0) b (1) of 2 bits, wherein, response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that response message b to be transmitted (0) b (1) that described the first state is corresponding, response message b to be transmitted (0) b (1) that described the second state is corresponding, described the 8th state are corresponding and described the 9th state are corresponding is different and be mapped as a kind of in following combination: 00,11,10,01.

7. method according to claim 1, is characterized in that, describedly according to described feedback states, generates response message to be transmitted and will described response message to be transmitted to up direction transmission, comprises:

By described response message to be transmitted and uplink information multiplexing after, described information after multiplexing is sent to up direction on the channel of the described uplink information of transmission.

8. method according to claim 7, is characterized in that,

When described uplink information is forward dispatch request indication SRI information, the response message described to be transmitted by 1 bit or the carrying of 2 bits is sent to up direction on the channel of described SRI information;

When described uplink information is channel status CSI information, after response message described to be transmitted by the carrying of 1 bit or 2 bits being modulated into orthogonal PSK QPSK symbol and being carried on a frequency pilot sign of described CSI information, on the channel of the described CSI information of transmission, to up direction, send; Or, the described response message described to be transmitted by 1 bit or the carrying of 2 bits is carried out to combined coding with described CSI information together with predetermined rule, the information after coding is sent to up direction on the channel of the described CSI information of transmission;

When described uplink information is upstream data information, by after response message described to be transmitted and described upstream data information multiplexing by 1 bit or the carrying of 2 bits, the information after multiplexing is sent to up direction on the channel of the described upstream data information of transmission.

9. the feedback method to multicarrier response message, is characterized in that, described method comprises:

Be received in the response message to be transmitted sending in same uplink member carrier, the feedback states of described response message indicating terminal to be transmitted to each downlink member carrier;

According to the mapping relations of described response message to be transmitted and described feedback states, resolve described response message to be transmitted and know described feedback states, described feedback states at least comprises the first state and the second state, described the first state indication only receives the data of transmitting on whole predetermined member carriers and described predetermined member carrier is all generated to confirmation response message, described the second state indication receives the data of transmitting at least one non-predetermined member carrier and does not have loss of data, and each member carrier of described transmission data is all generated to confirmation response message, wherein, described each downlink member carrier comprises at least one predetermined member carrier and/or at least one non-predetermined member carrier,

According to described feedback states, carry out corresponding operation.

10. method according to claim 9, is characterized in that, described reception response message to be transmitted comprises:

From the channel of uplink information, receive the response message described to be transmitted simultaneously transmitting with described uplink information, described uplink information comprises at least one in forward SRI information, CSI information or upstream data information.

11. according to the method described in claim 9 or 10, it is characterized in that, described according to the mapping relations of described response message to be transmitted and described feedback states, resolves described response message to be transmitted and knows that described feedback states comprises:

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the third state and the 4th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state and the 5th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the 6th state and the 7th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the 8th state and the 9th state;

Wherein, when the arbitrary member carrier generation in described each member carrier receiving is denied to response message, determine to be the third state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 4th state to the feedback states of described response message;

When arbitrary described each member carrier generation receiving is denied to response message, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 5th state to the feedback states of described response message;

When to described each member carrier receiving, all response message is denied in generation, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 6th state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and confirm to receive all member carriers of current subframe according to the indication field in described non-predetermined member carrier, if arbitrary described predetermined member carrier is generated and denies response message or do not feed back response message, and when all non-predetermined member carriers are all generated to confirmation response message, determine to be the 7th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier generation being denied to response message in described non-predetermined member carrier, or, in described non-predetermined member carrier, receive indication field and detect while there is loss of data, determining to be the 8th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier do not generated to response message in described non-predetermined member carrier, or, when receiving indication field but predetermined member carrier generation being denied to response message in described non-predetermined member carrier, determine to be the 9th state to the feedback states of described response message.

12. 1 kinds of feedback devices to multicarrier response message, is characterized in that, described device comprises:

Feedback states determining unit, be used for according to the response message of each downlink member carrier, determine the feedback states to described response message, described feedback states at least comprises the first state and the second state, described the first state indication only receives the data of transmitting on whole predetermined member carriers and described predetermined member carrier is all generated to confirmation response message, described the second state indication receives the data of transmitting at least one non-predetermined member carrier and does not have loss of data, and each member carrier of described transmission data is all generated to confirmation response message, wherein, described each downlink member carrier comprises at least one predetermined member carrier and/or at least one non-predetermined member carrier,

Feedback transmitting element, for generating response message to be transmitted and in same uplink member carrier, described response message to be transmitted being sent to up direction according to described feedback states.

13. devices according to claim 12, is characterized in that, described feedback states determining unit comprises the first state determination module and the second state determination module,

Described the first state determination module, for only receiving the data of transmitting on whole described predetermined member carriers and described predetermined member carrier all being generated to confirmation response message, determines to be described the first state to the feedback states of described response message;

Described the second state determination module, for knowing and not having loss of data according to the indication field of described at least one the non-predetermined member carrier receiving, and each member carrier of described transmission data is all generated while confirming response message, determine to be described the second state to the feedback states of described response message, wherein, in described at least one non-predetermined member carrier, carry indication field, described indication field indicates current sub-frame allocation to the sum of the Downlink Control Information DCI of terminal.

14. according to the device described in claim 12 or 13, it is characterized in that, described feedback states determining unit also comprises third state determination module and the 4th state determination module, or, described feedback states determining unit also comprises the 5th state determination module, or described feedback states determining unit also comprises the 6th state determination module and the 7th state determination module, or described feedback states determining unit also comprises the 8th state determination module and the 9th state determination module;

Described third state determination module, while denying response message for arbitrary member carrier of described each member carrier receiving is generated, determines to be the third state to the feedback states of described response message;

Described the 4th state determination module, be used for receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 4th state to the feedback states of described response message;

Described the 5th state determination module, while denying response message for the whole one-tenth of arbitrary described each member carrier to receiving, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 5th state to the feedback states of described response message;

Described the 6th state determination module, while denying response message for described each member carrier receiving is all generated, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 6th state to the feedback states of described response message;

Described the 7th state determination module, be used for receiving the transfer of data at least one non-predetermined member carrier, and confirm to receive all member carriers of current subframe according to the indication field in described non-predetermined member carrier, if arbitrary described predetermined member carrier is generated and denies response message or do not generate response message, and when all non-predetermined member carriers are all generated to confirmation response message, determine to be the 7th state to the feedback states of described response message;

Described the 8th state determination module, be used for when described non-predetermined member carrier does not receive indication field and predetermined member carrier generation is denied to response message, or, in described non-predetermined member carrier, receive indication field and detect while there is loss of data, determining to be the 8th state to the feedback states of described response message;

Described the 9th state determination module, for when described non-predetermined member carrier does not receive indication field and predetermined member carrier is not generated to response message, or, when receiving indication field but predetermined member carrier generation being denied to response message in described non-predetermined member carrier, determine to be the 9th state to the feedback states of described response message.

15. devices according to claim 12, it is characterized in that, described feedback transmitting element, specifically for by described response message to be transmitted and uplink information multiplexing after, described information after multiplexing is sent to up direction on the channel of the described uplink information of transmission.

16. 1 kinds of base stations, is characterized in that, comprising:

Receiving element, the response message to be transmitted sending for being received in same uplink member carrier, the feedback states of described response message indicating terminal to be transmitted to each downlink member carrier;

Resolution unit, be used for according to the mapping relations of described response message to be transmitted and described feedback states, resolve described response message to be transmitted and know described feedback states, described feedback states at least comprises the first state and the second state, described the first state indication only receives the data of transmitting on whole predetermined member carriers and described predetermined member carrier is all generated to confirmation response message, described the second state indication receives the data of transmitting at least one non-predetermined member carrier and does not have loss of data, and each member carrier of described transmission data is all generated to confirmation response message, wherein, described each downlink member carrier comprises at least one predetermined member carrier and/or at least one non-predetermined member carrier,

Performance element, for carrying out corresponding operation according to described feedback states.

17. base stations according to claim 16, is characterized in that,

Described receiving element, receives the response message described to be transmitted simultaneously transmitting with described uplink information specifically for the channel from uplink information, described uplink information comprises at least one in forward SRI information, CSI information or upstream data information.

18. according to the base station described in claim 16 or 17, it is characterized in that,

Described resolution unit, also for according to the mapping relations of described response message to be transmitted and described feedback states, resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the third state and the 4th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state and the 5th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the 6th state and the 7th state; Or,

According to the mapping relations of described response message to be transmitted and described feedback states, to resolve described response message to be transmitted and know described feedback states, described feedback states comprises the first state, the second state, the 8th state and the 9th state;

Wherein, when the arbitrary member carrier generation in described each member carrier receiving is denied to response message, determine to be the third state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 4th state to the feedback states of described response message;

When arbitrary described each member carrier generation receiving is denied to response message, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 5th state to the feedback states of described response message;

When to described each member carrier receiving, all response message is denied in generation, or, to receiving the transfer of data at least one non-predetermined member carrier, and while confirming current subframe generation loss of data according to the indication field in described non-predetermined member carrier, determine to be the 6th state to the feedback states of described response message;

To receiving the transfer of data at least one non-predetermined member carrier, and confirm to receive all member carriers of current subframe according to the indication field in described non-predetermined member carrier, if arbitrary described predetermined member carrier is generated and denies response message or do not feed back response message, and when all non-predetermined member carriers are all generated to confirmation response message, determine to be the 7th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier generation being denied to response message in described non-predetermined member carrier, or, in described non-predetermined member carrier, receive indication field and detect while there is loss of data, determining to be the 8th state to the feedback states of described response message;

When not receiving indication field and predetermined member carrier do not generated to response message in described non-predetermined member carrier, or, when receiving indication field but predetermined member carrier generation being denied to response message in described non-predetermined member carrier, determine to be the 9th state to the feedback states of described response message.

19. 1 kinds of communication systems, is characterized in that, described system comprises base station and terminal, and described terminal comprises the feedback device to multicarrier response message,

Described base station, for sending a plurality of downlink member carriers to described terminal, comprises at least one predetermined member carrier and/or at least one non-predetermined member carrier in described downlink member carrier; And, be received in the response message to be transmitted sending in same uplink member carrier, the feedback states of described response message indicating terminal to be transmitted to each downlink member carrier;

According to the mapping relations of described response message to be transmitted and described feedback states, resolve described response message to be transmitted and know described feedback states, and carry out corresponding operation according to described feedback states;

Described terminal, for utilizing the described feedback device to multicarrier response message according to the response message to described each member carrier, determine the feedback states to described response message, described feedback states at least comprises the first state and the second state, described the first state indication only receives the data of transmitting on whole described predetermined member carriers and described predetermined member carrier is all generated to confirmation response message, described the second state indication receives the data of transmitting at least one non-predetermined member carrier and does not have loss of data, and each member carrier of described transmission data is all generated to confirmation response message, according to described feedback states, generate response message to be transmitted and in same uplink member carrier, described response message to be transmitted sent to described base station.