WO2012129952A1

WO2012129952A1 - Method and system for sending acknowledgement message in time division duplex system

Info

Publication number: WO2012129952A1
Application number: PCT/CN2011/084975
Authority: WO
Inventors: 梁春丽; 戴博; 喻斌; 邬华明
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-01
Filing date: 2011-12-30
Publication date: 2012-10-04
Also published as: CN102142941A; CN102142941B

Abstract

A method and system for sending an acknowledgement message in a time division duplex system, suitable for a terminal configured to feed back a hybrid automatic repeat request acknowledgement (HARQ-ACK) message using physical uplink control channel (PUCCH) format 3. The method comprises: receiving a physical downlink shared channel (PDSCH) from a serving cell within a binding window; when receiving only the PDSCH without PDCCH from a primary serving cell and the PDSCH corresponding to a PDCCH with a downlink allocation index value equal to 1 within the binding window, feeding back the corresponding HARQ-ACK following one of the below methods: feeding back the corresponding HARQ-ACK using PUCCH format 3; feeding back the corresponding HARQ-ACK using PUCCH format 1b; feeding back the corresponding HARQ-ACK using PUCCH format 1b with the channel selection method. The present invention causes no impact on the existing protocol.

Description

Method and system for transmitting response message in time division duplex system

Technical field

The present invention relates to the field of communications, and in particular, to a method and system for transmitting a response message in a time division duplex system.

Background technique

In the Hybrid Automatic Repeat Request ( HARQ) mode, the codeword sent by the originator can not only detect errors but also have certain error correction capability. After receiving the codeword, the receiver decoder first checks the error condition. If the error correction capability of the codeword is within, the error correction is automatically performed. If there are many errors, the error correction capability of the codeword is exceeded, but the error can be detected. Then, the receiving end sends a decision signal to the originating end through the feedback channel, and requests the originating end to resend the information. In an Orthogonal Frequency Division Multiplex (OFDM) system, a HARQ Acknowledgement (HARQ-ACK, HARQ Acknowledgement) is used to indicate a reception condition of a transmitted data at a terminal, where a HARQ-ACK response message is used. It includes three states: ACK, Acknowledgement, Negative Acknowledgement, and Discontinuous Transmission (DTX), where DTX indicates that the terminal does not receive control for demodulating downlink data. The channel, and thus the demodulation corresponding downlink data, cannot be received, so that no response message is fed back. This state is called the DTX state. The base station determines whether retransmission is required according to the HARQ-ACK sent by the terminal. In the Long Term Evolution (LTE) system (the corresponding standard protocol is Rel-8/9), the HARQ-ACK response message can be separately sent on the Physical Uplink Control Channel (PUCCH). It can be sent with data on the Physical Uplink Shared Channel (PUSCH).

In a frequency division duplex (FDD) system, since the uplink and downlink subframes are corresponding, when the physical downlink shared channel (PDSCH, Physical Downlink Shared Channel) contains only one codeword stream, the terminal needs to The 1-bit HARQ-ACK response message is fed back. When the PDSCH includes two codeword streams, the terminal feeds back a 2-bit HARQ-ACK response message. When the terminal does not transmit the PUSCH in the current subframe, the terminal will 在 on the PUCCH. use The format la or the format lb is used to transmit the 1-bit or 2-bit HARQ-ACK response message; and when the terminal has the PUSCH transmission in the current subframe, the terminal passes the 1-bit or 2-bit information to a certain HARQ-ACK state. The mapping to the corresponding bits, channel coding, scrambling, and modulation are multiplexed with the data and then transmitted on the PUSCH.

In a Time Division Duplex (TDD) system, the uplink and downlink subframes are not—corresponding, that is, the HARQ-ACK response message corresponding to multiple downlink subframes needs to be in the PUCCH/PUSCH of one uplink subframe. The channel is sent, where the downlink subframe set corresponding to the uplink subframe constitutes a binding window. In LTE TDD, two HARQ-ACK response message feedback modes are defined: One is HARQ-ACK bundling, as shown in Figure 1, the basic idea of the feedback mode is that it will need to be on the uplink. The HARQ-ACK message of the codeword stream corresponding to each downlink subframe of the subframe is logically ANDed. If the PDSCH transmission of one downlink subframe includes two codeword streams, the terminal needs to feedback the logical operation and operation of the subframe. Corresponding to the 2-bit HARQ-ACK response message of each codeword stream, if the PDSCH transmission of each subframe has only one codeword stream, the terminal feeds back the logical logic and operation corresponding to the codeword stream. a bit HARQ-ACK response message, when the terminal does not have a PUSCH to transmit in the current subframe, the terminal will transmit the 1-bit or 2-bit HARQ-ACK response message in the format la or format lb on the PUCCH; When there is PUSCH transmission in the current subframe, the terminal multiplexes the 1-bit or 2-bit information through a certain channel coding, channel interleaving, and data, and then transmits the information on the PUSCH. The other is a HARQ-ACK multiplexing feedback mode. As shown in FIG. 2, the feedback mode needs to feed back one HARQ-ACK response message for each downlink subframe, and multiple subframes need to feed back multiple a HARQ-ACK response message, and when a PDSCH transmission of a downlink subframe includes two codeword streams, first perform logical AND operations on the HARQ-ACK response messages of the two codeword streams corresponding to each downlink subframe (also called For spatial binding operations, each downlink subframe corresponds to only one HARQ-ACK response message. When the terminal does not have a PUSCH to transmit in the current subframe, the terminal will transmit the multiple HARQ-ACK response messages by using the format lb with channel selection on the PUCCH. The core idea of the method is Different HARQ-ACK response messages are represented by different PUCCH channels and different modulation symbols on the channel. The method enables a portable HARQ-ACK response message to be up to 4 bits by channel selection in combination with the control channel format lb. When LTE defines different subframe configurations (that is, when the uplink and downlink subframe configurations are 1:2, 1:3, or 1:4, respectively), HARQ-ACK A mapping relationship between the state combination of the response message and the selected PUCCH channel and the 2-bit information b(0) and b(1) carried on the channel (referred to as a mapping table).

The terminal uses HARQ-ACK bundling mode or HARQ-ACK multiplexing mode to feed back HARQ-ACK by higher layer configuration. The discussion that follows is only sent on PUCCH for HARQ-ACK.

In order to meet the requirements of the Advanced International Telecommunication Union (ITU-Advanced), the LTE-Advanced Long Term Evolution Advanced (LTE-A) system (the corresponding standard protocol is Rel-10) Need to support larger system bandwidth (up to 100MHz) and need to be backward compatible with existing LTE standards. Based on the existing LTE system, the bandwidth of the LTE system can be combined to obtain a larger bandwidth. This technology is called Carrier Aggregation (CA) technology, which can improve the spectrum of the IMT-Advance system. Utilization and mitigation of spectrum resources are scarce, thereby optimizing the utilization of spectrum resources.

In a system in which carrier aggregation is introduced, a carrier to be aggregated is called a component carrier (CC), which is also called a serving cell. At the same time, the concepts of the primary component carrier/cell (PCC/PCell, Primary Component Carrier/Cell) and the secondary component carrier/cell (SCC/SCell, Secondary Component Carrier/Cell) are also proposed. In the system for performing carrier aggregation, at least one primary serving cell and a secondary serving cell are included, wherein the primary serving cell is always in an active state.

When LTE-A uses carrier aggregation technology, and the base station configures multiple downlink serving cells for the terminal, the terminal needs to feed back HARQ-ACK response messages of the corresponding codeword streams of the multiple downlink serving cells. In LTE-A, when the HARQ-ACK response message is sent on the PUCCH, two feedback modes are defined: PU PUCCH format lb joint channel selection (Format lb with channel selection) and spread based on discrete Fourier transform Frequency feedback multiplexing (DFT-s-OFDM) feedback. Since the channel structure of the feedback mode based on DFT-s-OFDM is different from PUCCH format l/la/lb/2/2a/2b, in the existing LTE-A protocol, this structure is called PUCCH format 3 ( PUCCH format 3). For a terminal configured with multiple serving cells, if the terminal can only support up to 4 bits of HARQ-ACK feedback, the terminal will feed back HARQ-ACK in PUCCH format lb joint channel selection; if the terminal can support Greater than 4 bits If the HARQ-ACK is fed back, the base station will further configure whether the terminal uses the PUCCH format lb joint channel selection method or the PUCCH format 3 to feed back HARQ-ACK ₀ through high layer signaling.

The current protocol provides that, for the resource allocation of the PUCCH format 3, the terminal will jointly determine the HARQ-ACK resource indicator (ARI, ACK/NACK Resource Indicator) on the PDCCH corresponding to the PDSCH of the secondary serving cell and the PUCCH resource information of the high layer configuration. The ARI field of the PDCCH reuses the transmission power control of the PDCCH (TPC, Transport Power is a power control command, but is used as an ARI, and assumes that the ARIs on the SCell have the same value.

In a TDD system, when a terminal is configured with only one serving cell, the terminal can use one of the following three methods to feed back HARQ-ACK: TDD HARQ-ACK bundling, TDD HARQ-ACK multiplexing or PUCCH format 3. The base station can use high-level signaling to indicate which way the terminal uses feedback. When the terminal is configured to use the PUCCH format 3 to feed back the HARQ-ACK, the current working assumption is that the channel resource of the PUCCH format 3 used by the terminal will be based on the received downlink allocation index (DAI, Downlink Assignment Index). The TPC corresponding to the PDCCH greater than or equal to 2 and the PUCCH format 3 resource configured by the upper layer are determined, that is, the TPC corresponding to the PDCCH with the DAI value greater than or equal to 2 is used as the ARI, and the TPC corresponding to the PDCCH with the DAI value equal to 1 is used as the real TPC. However, when the terminal receives only one PDSCH without a PDCCH (that is, a Semi-Persistent Schedule (SPS)) and a PDSCH corresponding to a PDCCH with a DAI value equal to 1, how does the terminal feed back its corresponding HARQ-ACK? There is no corresponding solution. Summary of the invention

It is an object of the present invention to provide a method and system for transmitting a response message in a time division duplex system, which solves a PDSCH (hereinafter referred to as SPS PDSCH) without a PDCCH and only a PDCCH having a DAI value equal to 1 for receiving an autonomous serving cell. How to feedback the HARQ-ACK problem when the corresponding PDSCH is used.

In order to solve the above problems, the following technical solutions are used: A method for transmitting a response message in a time division duplex system, applicable to a terminal configured to use a physical uplink control channel (PUCCH) format 3 to feed back a hybrid automatic repeat request response message (HARQ-ACK), the transmission method include:

Receiving a physical downlink shared channel (PDSCH) from the serving cell in the binding window; receiving only one PDSCH without the PDCCH and one downlink allocation index ( _DAI ) value equal to 1 in the primary serving cell in the binding window When the PDSCH corresponding to the PDCCH is received, the corresponding HARQ-ACK is fed back in one of the following ways:

PUUsing PUCCH format 3 to feed back the corresponding HARQ-ACK;

PUUsing the PUCCH format lb to feed back the corresponding HARQ-ACK;

PU The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK.

Reusing the received PDCCH/transmission power control (TPC) corresponding to the PDCCH with the DAI value equal to 1 as the ACK/NACK resource indicator (ARI), and determining the corresponding PUCCH format 3 resource in combination with the PUCCH format 3 resource configured in the upper layer, and then The corresponding HARQ-ACK is fed back on the determined PUCCH format 3 resource.

The corresponding PUCCH format 3 resource is determined according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then the corresponding HARQ-ACK message is fed back on the determined PUCCH format 3 resource.

The sending method further includes:

When receiving a PDSCH without a PDCCH in the binding window, the terminal selects a corresponding PUCCH format 3 resource according to a preset ARI value and a high-level configured PUCCH format 3 resource, and then the corresponding PUCCH format 3 resource. The corresponding HARQ-ACK message is fed back.

Performing a spatial binding operation on a HARQ-ACK of a PDSCH without a PDCCH and a HARQ-ACK of a PDSCH corresponding to a PDCCH having a DAI value of 1 to obtain a 2-bit Send on the agreed PUCCH resource first.

The pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.

Wherein: the step of feeding back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner includes:

The corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection in the Rel-10 Frequency Division Duplex (FDD) system.

The PUCCH format lb joint channel selection when the Rel-10 Time Division Duplex (TDD) system is configured as one serving cell selects the corresponding HARQ-ACK message in the same manner.

A transmitting system for answering messages in a time division duplex system, suitable for use in a terminal configured to transmit a hybrid automatic repeat request response message (HARQ-ACK) using a Physical Uplink Control Channel (PUCCH) format 3, the transmitting system The first device and the second device are included, where: the first device is configured to: receive a physical downlink shared channel (PDSCH) from a serving cell in a binding window;

The second device is configured to: when the first device receives, in the binding window, only one PDSCH without a PDCCH in the primary serving cell and a PDCCH corresponding to a downlink allocation index (DAI) value equal to 1 In the PDSCH, the corresponding HARQ-ACK message is fed back in one of the following ways:

PUUsing PUCCH format 3 to feed back the corresponding HARQ-ACK;

PUUsing the PUCCH format lb to feed back the corresponding HARQ-ACK;

PU The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK. Wherein: the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:

Reusing the received transmission power control (TPC) corresponding to the PDCCH with the DAI value equal to 1 as the ACK/NACK resource indicator (ARI), and combining the PUCCH format 3 resources configured by the upper layer The corresponding PUCCH format 3 resource is determined, and then the corresponding HARQ-ACK message is fed back on the determined PUCCH format 3 resource.

Wherein: the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:

Determine the corresponding ARI value according to the preset ARI value and the PUCCH format 3 resource of the high-level configuration.

The PUCCH format 3 resource then feeds back the corresponding HARQ-ACK message on the determined PUCCH format 3 resource.

The second device is further configured to: when the terminal is configured to use PUCCH format 3 to feed back a corresponding HARQ-ACK, and the first device receives a PDSCH without a PDCCH in the binding window. The corresponding PUCCH format 3 resource is selected according to the preset ARI value and the high-level configured PUCCH format 3 resource, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.

Wherein: the second device is configured to use the PUCCH format lb to feed back the corresponding HARQ-ACK in the following manner:

The HARQ-ACK of the PDSCH without the PDCCH and the HARQ-ACK of the PDSCH corresponding to the PDCCH with the DAI value of 1 are spatially bound to obtain a 2-bit pre-agreed PUCCH resource.

Wherein: the second device is configured to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:

The corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when the Rel-10 Time Division Duplex (TDD) system is configured as one serving cell. After the above technical solution is adopted, a solution for feeding back a HARQ-ACK response message is provided for a terminal that only receives a PDSCH without a PDCCH and a PDCCH with a DAI value equal to 1 to the autonomous serving cell, which is simple to implement and has high applicability. And will not affect existing agreements. BRIEF abstract

Figure 1 is a schematic diagram of the HARQ-ACK bundling mode;

2 is a schematic diagram of a HARQ-ACK multiplexing mode;

3 is a schematic diagram of a terminal use mode 1-1 feedback HARQ-ACK response message in the application example 1 of the present invention;

4 is a schematic diagram of a terminal use mode 1-1 feedback HARQ-ACK response message in Application Example 2 of the present invention;

FIG. 5 is another schematic diagram of the terminal use mode 1-2 feedback HARQ-ACK response message in the application example 3 of the present invention; FIG.

6 is a schematic diagram of a terminal use mode 2 feedback HARQ-ACK response message in the application example 4 of the present invention;

7 is a schematic diagram of a terminal use mode 3-1 feedback HARQ-ACK response message in the application example 5 of the present invention;

8 is a schematic diagram of a terminal using mode 3-1 feedback HARQ-ACK response message in Application Example 6 of the present invention;

9 is a schematic diagram of a terminal using mode 3-1 feedback HARQ-ACK response message in the application example 7 of the present invention;

10 is a schematic diagram of a terminal use mode 3-2 feedback HARQ-ACK response message in the application example 8 of the present invention;

11 is a schematic diagram of a terminal use mode 3-2 feedback HARQ-ACK response message in the application example 9 of the present invention. Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

In this embodiment, the method for sending a response message in the time division duplex system is applicable to a terminal configured to use the PUCCH format 3 to feed back a HARQ-ACK response message, including:

Receiving a PDSCH from a serving cell in a binding window;

When only one PDSCH without PDCCH and one PDSCH corresponding to the PDCCH with a DAI value equal to 1 are received in a bound window, the terminal uses any of the following methods to feed back the HARQ-ACK response. Message:

Mode 3: The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK response message.

The binding window includes a time-frequency two-dimensional resource, and the time domain refers to a plurality of downlink subframes corresponding to one uplink subframe according to the uplink and downlink subframes, and the frequency domain refers to a serving cell or a carrier that is configured for the terminal.

The foregoing method 1 specifically includes the mode 1-1 and the mode 1-2:

Mode 1-1: The terminal determines the PUCCH format 3 resource according to the received TPC corresponding to the PDCCH with the DAI value equal to 1 and the PUCCH format 3 resource configured by the upper layer, and then feeds back corresponding information on the determined PUCCH format 3 resource n _CH HARQ-ACK response message. Where p is the antenna port number, which is 0 or 1.

The determining the corresponding PUCCH format 3 resource n _CH according to the received TPC corresponding to the PDCCH with the DAI value equal to 1 and the PUCCH format 3 resource configured by the upper layer refers to: the TPC corresponding to the PDCCH that receives the received DAI value equal to 1. The value is used as the value of the ARI, and the PUCCH format 3 resource n _CH is determined in combination with the PUCCH format 3 resource of the high layer configuration. Since the TPC value has been used as the value of the API, accordingly, the terminal is equivalent to no TPC life. Order.

Manner 1-2: The terminal selects a corresponding PUCCH format 3 resource according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then feeds back a corresponding HARQ-ACK response message on the selected PUCCH format 3 resource. When there is an SPS subframe in the corresponding binding window, the terminal uses mode 1-2 to feed back the corresponding HARQ-ACK response message.

In addition, the foregoing method 2 specifically includes: the terminal first performs spatial binding operation ( Spatial Bundling) on the received PDSCH without the PDCCH and the PDSCH corresponding to the PDCCH corresponding to the PDCCH with the DAI value equal to 1, and obtains 2 bits. The HARQ-ACK response message is then sent by the PUCCH format lb on the pre-agreed PUCCH format la/lb resource to obtain the 2-bit HARQ-ACK response message obtained after spatial binding.

The pre-agreed PUCCH format la/lb resource may be a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.

In addition, the foregoing manner 3 specifically includes the mode 3-1 and the mode 3-2:

Mode 3-1: The terminal feeds back the corresponding HARQ-ACK message in the same manner as the PUCCH format lb joint channel selection in the Rel-10 FDD system;

Mode 3-2: When the terminal is configured with the Rel-10 TDD system as a one-month service cell

The PUCCH format lb joint channel selects the same manner to feed back the corresponding HARQ-ACK message.

When the current mode is used, the lower uplink subframe configuration value M is determined according to the uplink and downlink subframe configuration configured in the terminal.

Correspondingly, the embodiment of the present invention further provides a sending system for a response message in a time division duplex system, which is applicable to a terminal configured to transmit a HARQ-ACK response message by using PUCCH format 3, where the sending system includes a device and a second device, wherein:

The first device is configured to: receive a PDSCH from a serving cell in a binding window; The second device is configured to: when the first device receives only one PDSCH without a PDCCH in the primary serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1 in the binding window, according to the following One of the modes feeds back the corresponding HARQ-ACK response message:

Preferably, the second device is configured to use the PUCCH format 3 to feed back the corresponding HARQ-ACK in the following manner:

Reusing the received PDCCH/Transmission Power Control (TPC) corresponding to the PDCCH whose DAI value is equal to 1 as an ACK/NACK resource indicator (ARI), and determining the corresponding PUCCH format 3 resource by combining the PUCCH format 3 resources configured by the upper layer, A corresponding HARQ-ACK message is then fed back on the corresponding PUCCH format 3 resource.

The corresponding PUCCH format 3 resource is determined according to the preset ARI value and the PUCCH format 3 resource configured by the upper layer, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.

Preferably, the system further comprises a third device:

The third device is configured to: when the first device receives one in the bound window

In the PDSCH of the PDCCH, the corresponding PUCCH format 3 resource is selected according to the preset ARI value and the PUCCH format 3 resource configured in the upper layer, and then the corresponding HARQ-ACK message is fed back on the corresponding PUCCH format 3 resource.

Preferably, the second device is further configured to use the PUCCH format lb to feedback the corresponding HARQ-ACK in the following manner:

After spatially binding the HARQ-ACK of the PDSCH without the PDCCH and the HARQ-ACK of the PDSCH corresponding to the PDCCH with the DAI value equal to 1, the obtained 2 The bit HARQ-ACK message is transmitted on the pre-agreed PUCCH resource by the PUCCH format lb mode.

Preferably, the pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.

Preferably, the second device is further configured to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:

Preferably, the second means is arranged to feed back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner as follows:

The corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when the Rel-10 TDD system is configured as one serving cell.

Application examples of the present invention will be described in detail below with reference to the accompanying drawings.

Application example 1

As shown in FIG. 3, the base station configures two serving cells for the terminal: the primary serving cell and the secondary serving cell, and configures the terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message.

It is assumed that in a certain binding window, the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1, and assumes that the TPC value on the PDCCH with a DAI value equal to 1 is "01". " .

Assume that the correspondence between the value of ARI and the resource of PUCCH format 3 is as shown in Table 1.

Table 1 Table of relationship between ARI values and PUCCH format 3 resources

ΊΟ' The third high-level configuration of PUCCH resources

Ί Ι' The fourth high-level configuration of PUCCH resources

When the terminal uses the foregoing mode 1-1 to feed back the HARQ-ACK response message, in the mode 1-1, the TPC of the PDCCH with the DAI value equal to 1 is reused as the ARI, that is, the terminal is equal to 1 according to the received DAI value. The TPC corresponding to the PDCCH and the PUCCH format 3 resource configured by the upper layer determine the PUCCH format 3 resource. According to Table 1, the terminal will use the PUCCH format 3 resource of the second higher layer to feed back the corresponding HARQ-ACK response message on PUCCH format 3.

Application example 2

As shown in FIG. 4, the base station configures a primary serving cell for a terminal, and configures the terminal to use PUCCH format 3 to feed back a HARQ-ACK response message.

It can be seen from Embodiments 1 and 2 that no matter how many serving cells are configured in the terminal, as long as it configures a PDSCH without a PDCCH and a PDSCH corresponding to a PDCCH with a DAI value equal to 1 of the primary serving cell, it feeds back the HARQ-ACK. The way is the same. Therefore, in the following embodiments, it is no longer described how many serving cells are configured by the terminal.

At the same time, the base station needs to prevent the PUCCH format 3 resource used by the terminal from colliding with the PUCCH format 3 resource used by other terminals during scheduling. Application example 3

The base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message. It is assumed that in a certain binding window, the terminal only receives a PDSCH without PDCCH and a PDCCH with a DAI value equal to 1 from the autonomous serving cell, and the corresponding relationship between the value of the ARI and the resource of PUCCH format 3 is as shown in Table 1.

When the terminal uses the foregoing mode 1-2 to feed back the HARQ-ACK response message, the terminal determines the PUCCH format 3 resource according to the default ARI value and the PUCCH format 3 resource configured by the upper layer, and assumes that the default ARI value is "00". According to Table 1, the terminal will feed back the corresponding HARQ-ACK response message on PUCCH format 3 by using the PUCCH format 3 resource of the first higher layer configuration.

Considering that the terminal may have DTX (Discontinuous Transmission) in some subframes, that is, the base station schedules the PDSCH on a certain subframe, but since the terminal does not detect the corresponding PDCCH, it cannot detect it. The corresponding PDSCH.

As shown in FIG. 5, it is assumed that the base station schedules a PDSCH without a PDCCH, a PDSCH corresponding to a PDCCH having a DAI value equal to 1, and a PDSCH corresponding to a PDCCH having a DAI value equal to 2. In this case, if the terminal does not generate DTX on some subframes, the terminal will send a corresponding HARQ-ACK response message on the PUCCH format 3 resource corresponding to the ARI with the DAI value equal to 2. However, as shown in FIG. 5, if the terminal does not detect the PDCCH with the DAI value equal to 2, but only receives a PDSCH without the PDCCH and a PDSCH corresponding to the PDCCH with the DAI value equal to 1, the terminal will use the default ARI corresponding. The PUCCH format 3 resource sends a corresponding HARQ-ACK response message. In this case, the base station side considers that the terminal sends a corresponding HARQ-ACK response message to the PUCCH format 3 resource corresponding to the ARI with the DAI value equal to 2. In fact, the terminal uses the PUCCH format 3 corresponding to the default ARI. The resource sends a corresponding HARQ-ACK response message, and the base station needs to blindly detect both cases. Moreover, there may be a situation of resource conflict at this time, because it is very likely that the PUCCH resource base station corresponding to the default ARI has been allocated to other terminals. To solve the possible resource conflict problem, it may be stipulated that when the SPS PDSCH is in the subframe, if the terminal is configured to use the PUCCH format 3 to feed back the HARQ-ACK, the default is used regardless of whether the PDSCH with the DAI value of 2 is received. The PUCCH format 3 resource corresponding to the ARI transmits a corresponding HARQ-ACK response message. Application example 4

As shown in Figure 6, the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message.

It is assumed that, in a certain binding window, the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1. When the terminal feeds back the HARQ-ACK response message in the above manner 2, the terminal First, a spatially bound BFD of a PDSCH without a PDCCH and a HARQ-ACK response message of a PDSCH corresponding to a PDCCH with a DAI value equal to 1 is obtained, and then a 2-bit HARQ-ACK response message is obtained, and then used. The PUCCH format lb transmits the 2-bit HARQ-ACK response message obtained after the spatial bonding operation is performed on the PUCCH resource corresponding to the PDCCH including the DAI value equal to 1.

The PUCCH resource corresponding to the PDCCH with the DAI value equal to 1 is determined according to an implicit mapping relationship of a minimum CCE (Control Channel Element) index of the PDCCH with a DAI value equal to 1.

Application example 5

As shown in Figure 7, the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message, and determines M=4 according to the uplink and downlink subframe configuration, and configures the primary serving cell as the transmission mode of the dual codeword stream.

It is assumed that in a certain binding window, the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1. When the terminal uses the foregoing mode 3-1 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in a similar manner to the PUCCH format lb joint channel selection under the Rel-10 FDD system, specifically:

The terminal maps the HARQ-ACK response message of the two codeword streams corresponding to the SPS subframe to HARQ-ACK (0) and HARQ-ACK (1), and the PDCCH of DAI=1 corresponds to the HARQ of the two codeword streams of the PDSCH. - The ACK response message is mapped to HARQ-ACK (2) and HARQ-ACK (3). Since there are 4 HARQ-ACK response messages in total, the terminal selects the mapping table of A=4 shown in Table 2, according to {HARQ -ACK(O), HARQ-ACK(l), HARQ-ACK(2), HARQ-ACK(3)} The feedback status determines (selects) a channel "^ _CCT ^. b(0)b(l), then the selected b(0)b(l) is sent out on the selected "channel."

Rel-10 FDD system PUCCH format lb joint channel selection A=4 mapping table

Application example 6

As shown in Figure 8, the base station configures a terminal with PUCCH format 3 for feedback. The HARQ-ACK responds to the message, and determines M=4 according to the uplink and downlink subframe configuration, and the primary serving cell is configured as a transmission mode of the dual codeword stream.

For the SPS subframe, since there is only one codeword stream in the actual scheduling, although the primary serving cell is configured as the transmission mode of the dual codeword stream, the terminal maps the HARQ-ACK response message corresponding to the SPS subframe to the HARQ-ACK. ^^, the DAI=1 PDCCH corresponds to the two codes of the PDSCH, and there are three HARQ-ACK response messages. Therefore, the terminal selects the mapping table of A=3 shown in Table 3, according to {11^(0 0), 1^( 0 1), 1^( 0; 2) } feedback state, determine (select) a channel "^^ and b(0)b(l), and then select on the selected "^^ channel" The b(0)b(l) is sent out.

Table 3 Rel-10 FDD system PUCCH format lb Joint channel selection A=3 mapping table

Application Examples 5 and 6 differ in the processing of SPS subframes, in Application Example 5, Equivalent to mapping the codeword stream without PDSCH transmission in the SPS subframe to HARQ-ACK(l). Here, HARQ-ACK(l) needs to be set to the default value (NACK or DTX), but in the application. In Example 6, it is considered that the SPS subframe transmission only contains one codeword stream, and therefore, the SPS subframe may correspond to only one HARQ-ACK response message. Comparing Application Examples 5 and 6, the application example 6 has only three bits of the HARQ-ACK response message actually fed back, and thus Application Example 6 is a preferred scheme.

Application example 7

As shown in Figure 9, the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message, and determines M=4 according to the uplink and downlink subframe configuration, and the primary serving cell is configured as a single codeword stream transmission mode.

The terminal maps the HARQ-ACK response message of one codeword stream corresponding to the SPS subframe to the HARQ-ACK (0), and maps the HARQ-ACK response message of the PDCCH corresponding to the codeword stream of the PDSCH to the HARQ-ACK message of the PDSCH. (l), since there are a total of 2 HARQ-ACK response messages, the terminal selects the mapping table of A=2 shown in Table 4, according to the feedback state of {HARQ-ACK(O), HARQ-ACK(l)}, A channel "^ ^ and 1) (0) 1) (1) is determined (selected), and then the selected b(0)b(l) is transmitted on the selected n _CCH channel. Table 4 Rel-10 FDD system PUCCH format lb mapping table for A=2 when joint channel selection

„(i)

NACK NACK/DTX 0,0

DTX NACK/DTX does not send

Application example 8

As shown in Figure 10, the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message, and determines M=4 according to the uplink and downlink subframe configuration, and the primary serving cell is configured as a dual codeword stream transmission mode.

It is assumed that in a certain binding window, the terminal only receives a PDSCH without a PDCCH from the autonomous serving cell and a PDSCH corresponding to a PDCCH with a DAI value equal to 1. When the terminal uses the above manner 3-2 to feed back the HARQ-ACK response message. That is, the corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when a serving cell is configured in the Rel-10 TDD system, specifically:

The terminal performs spatial bundling for each subframe in the binding window to obtain M (M=4 in this application example) HARQ-ACK after bundling, {HARQ-ACK(O), HARQ-ACK(l), HARQ -ACK(2), HARQ-ACK(3)}, then select the mapping table of M=4 shown in Table 5, or select the mapping table of M=4 shown in Table 6, according to {HARQ-ACK(O) , HARQ-ACK (l), HARQ-ACK (2), HARQ-ACK (3)} feedback state, determine (select) a channel "^ ^ and b (0) b (l), and then in the selected " The b(0)b(l) is transmitted on the ^^ channel.

PUCCH format lb joint channel selection M=4 mapping table

ACK, ACK, NACK/DTX, NACK/DTX "PUCCH, 1 1,0

ACK, NACK/DTX, ACK, ACK 〃PUCCH, 3 0,1

NACK/DTX, NACK/DTX, NACK/DTX, NACK ¹ ) 1,1

ACK, NACK/DTX, ACK, NACK/DTX ¹ ) 0,1

ACK, NACK/DTX, NACK/DTX, ACK ¹ ) 0,1

ACK, NACK/DTX, NACK/DTX, NACK/DTX ¹ ) 1,1

NACK/DTX, ACK, ACK, ACK 〃PUCCH, 3 0,1

NACK/DTX, NACK, DTX, DTX "PUCCH, 1 0,0

NACK/DTX, ACK, ACK, NACK/DTX 〃PUCCH, 2 1,0

NACK/DTX, ACK, NACK/DTX, ACK "PUCCH, 3 1,0

NACK/DTX, ACK, NACK/DTX, NACK/DTX "PUCCH, 1 0,1

NACK/DTX, NACK/DTX, ACK, ACK 〃PUCCH, 3 0,1

NACK/DTX, NACK/DTX, ACK, NACK/DTX ¹ ) 0,0

NACK/DTX, NACK/DTX, NACK/DTX, ACK 〃PUCCH, 3 0,0

DTX, DTX, DTX, DTX are not sent. Table 6 PUCCH format lb Joint channel selection Another mapping table of M=4

HARQ-ACK(O), HARQ-ACK(l), ^PUCCH b(0)b(l) HARQ-ACK(2), HARQ-ACK(3)

ACK, ACK, ACK, ACK WpUCCH, l 1,1

ACK, ACK, ACK, NACK/DTX „(i)

^W PUCCH, 2 1,1

ACK, ACK, NACK/DTX, ACK „(i)

wPUCCH, 0 1,0

ACK, ACK, NACK/DTX, NACK/DTX „(i)

w PUCCH, i 1,0 ACK, NACK/DTX, ACK, ACK „(i)

^W PUCCH, 3 1, 1

ACK, NACK/DTX, ACK, NACK/DTX „(i)

^W PUCCH, 2 1, 0

ACK, NACK/DTX, NACK/DTX, ACK „(i)

wPUCCH, 0 ο, ι

ACK, NACK/DTX, NACK/DTX, NACK/DTX „(i)

wPUCCH, 0 1, 1

NACK/DTX, ACK, ACK, ACK „(i)

w PUCCH, i 0, 0

NACK/DTX, ACK, ACK, NACK/DTX „(i)

^W PUCCH, 2 ο, ι

NACK/DTX, ACK, NACK/DTX, ACK „(i)

^W PUCCH, 3 1, 0

NACK/DTX, ACK, NACK/DTX, NACK/DTX „(i)

w PUCCH, i ο, ι

NACK/DTX, NACK/DTX, ACK, ACK „(i)

^W PUCCH, 3 ο, ι

NACK/DTX, NACK/DTX, ACK, NACK/DTX „(i)

^W PUCCH, 2 0, 0

NACK/DTX, NACK/DTX, NACK/DTX, ACK „(i)

^W PUCCH, 3 0, 0

NACK, NACK/DTX, NACK/DTX, „(i)

wPUCCH, 0 0, 0

NACK/DTX

DTX, NACK/DTX, NACK/DTX, NACK/DTX are not sent

The mapping table of M=4 shown in Table 5 is selected, or the mapping table of M=4 shown in Table 6 is selected, depending on the PUCCH format lb joint channel selection when a serving cell is configured under the Rel-10 TDD system. The mapping table used.

The mapping table used in the PUCCH format lb joint channel selection when a serving cell is configured in the Rel-10 TDD system is configured by higher layer signaling, and can be configured to use the mapping table shown in Table 5, or configured as Table 6. The mapping table shown.

Application example 9

As shown in Figure 11, the base station configures a terminal to use the PUCCH format 3 to feed back the HARQ-ACK response message, and determines M=3 according to the uplink and downlink subframe configuration, and configures the primary serving cell as the transmission mode of the dual codeword stream.

Assume that within a certain binding window, the terminal only receives one of the incoming autonomous serving cells without PDCCH. The PDSCH and the PDSCH corresponding to the PDCCH with a DAI value equal to 1, when the terminal uses the above manner 3-2 to feed back the HARQ-ACK response message, that is, the PUCCH when a serving cell is configured with the Rel-10 TDD system. When the format lb joint channel selects the same manner to feed back the corresponding HARQ-ACK message, specifically, it includes:

The terminal performs spatial bundling for each subframe in the binding window to obtain M (M=3 in this application example) HARQ-ACK after bundling, {HARQ-ACK(O), HARQ-ACK(l), HARQ -ACK(2), HARQ-ACK(3)}, then select the mapping table of M=3 shown in Table 7, or select the mapping table of M=3 shown in Table 8, according to {HARQ-ACK(O) , HARQ-ACK(l), HARQ-ACK(2)} feedback state, determining (selecting) a channel "^ and b(0)b(l), and then selecting the selected b on the selected _CCH channel (0)b(l) is sent out.

Table Ί PUCCH format lb Joint channel selection M=3 mapping table

Another mapping table of M=3 when PUCCH format lb joint channel selection

When M=2 is determined according to the uplink and downlink subframe configuration, the mapping table of M=2 shown in Table 9 or Table 10 is selected to determine that the corresponding response message is fed back on the corresponding resource, and the specific process is the same as above. Repeat them.

Table 9 Mapping table of PUCCH format lb joint channel selection M=2

NACK, DTX 〃PUCCH, 0 1, 0

DTX, DTX does not send

Another mapping table of M=2 when PUCCH format lb joint channel selection

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In view of the present invention, various other modifications, equivalents, improvements, etc., should be made without departing from the spirit and scope of the invention. It is included in the scope of protection of the present invention.

Industrial applicability

After using the above technical solution, there is no PDCCH for receiving only one incoming autonomous serving cell. The terminal of the PDSCH and a PDCCH with a DAI value equal to 1 provides a solution for feeding back the HARQ-ACK response message, which is simple to implement, highly applicable, and does not affect the existing protocol. Therefore, the present invention has strong industrial applicability.

Claims

Claim

A method for transmitting a response message in a time division duplex system, adapted to be configured to use a physical uplink control channel (PUCCH) format 3 to feed back a hybrid automatic repeat request response message.

In the terminal of ( HARQ-ACK ), the sending method includes:

PUUsing PUCCH format 3 to feed back the corresponding HARQ-ACK;

PUUsing the PUCCH format lb to feed back the corresponding HARQ-ACK;

2. The transmitting method according to claim 1, wherein: the step of using PUCCH format 3 to feed back the corresponding HARQ-ACK comprises:

3. The transmitting method according to claim 1, wherein: the step of using PUCCH format 3 to feed back the corresponding HARQ-ACK comprises:

4. The transmitting method according to claim 3, the transmitting method further comprising:

5. The transmitting method according to claim 1, wherein: PUusing PUCCH format lb for feedback The corresponding HARQ-ACK steps include:

The HARQ-ACK of the PDSCH without the PDCCH and the HARQ-ACK of the PDSCH corresponding to the PDCCH with the DAI value of 1 are spatially bound, and then the 2-bit pre-committed PUCCH resource is transmitted.

6. The transmitting method according to claim 5, wherein:

7. The transmitting method according to claim 1, wherein: the step of feeding back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner comprises:

8. The transmitting method according to claim 1, wherein: the step of feeding back the corresponding HARQ-ACK in a PUCCH format lb joint channel selection manner comprises:

9. A transmitting system for answering messages in a time division duplex system, adapted to be configured to use a physical uplink control channel (PUCCH) format 3 to send a hybrid automatic repeat request response message

In the ( HARQ-ACK ) terminal, the transmitting system includes a first device and a second device, where: the first device is configured to: receive a physical downlink shared channel ( PDSCH ) from the serving cell in a binding window;

PUUsing PUCCH format 3 to feed back the corresponding HARQ-ACK;

PUUsing the PUCCH format lb to feed back the corresponding HARQ-ACK; The PUCCH format lb joint channel selection is used to feed back the corresponding HARQ-ACK.

10. The transmitting system according to claim 9, wherein: the second device is configured to reuse a transmission power control (TPC) corresponding to a PDCCH having a received DAI value equal to 1 as an ACK/NACK resource indicator ( ARI), and combining the PUCCH format 3 resources of the high layer configuration to determine the corresponding PUCCH format 3 resources, and then feeding back the corresponding HARQ-ACK message on the determined PUCCH format 3 resources.

11. The transmitting system according to claim 9, wherein: the second device is configured to determine a corresponding one according to a PUCCH format 3 resource according to a preset ARI value and a high layer configuration.

12. The transmitting system according to claim 11, wherein:

The second device is further configured to: when the terminal is configured to use the PUCCH format 3 to feed back a corresponding HARQ-ACK, and the first device receives a PDSCH without a PDCCH in the binding window, Selecting a corresponding PUCCH format 3 resource according to the preset ARI value and the high-level configured PUCCH format 3 resource, and then feeding back a corresponding HARQ-ACK message on the corresponding PUCCH format 3 resource.

13. The transmitting system according to claim 9, wherein: the second device is configured to perform space binding according to a HARQ-ACK of a PDSCH corresponding to a PDCCH without a PDCCH and a HARQ-ACK corresponding to a PDCCH having a DAI value of 1. After the operation, a 2-bit pre-agreed PUCCH resource is sent.

The transmitting system according to claim 13, wherein: the pre-agreed PUCCH resource is a PUCCH resource corresponding to the PDCCH with the DAI value equal to 1.

15. The transmitting system according to claim 9, wherein: said second device is configured to feed back said corresponding one in a PUCCH format lb joint channel selection manner in the following manner HARQ-ACK:

16. The transmitting system according to claim 9, wherein: said second device is configured to feed back said corresponding HARQ-ACK in a manner of PUCCH format lb joint channel selection in the following manner:

The corresponding HARQ-ACK message is fed back in the same manner as the PUCCH format lb joint channel selection when the Rel-10 Time Division Duplex (TDD) system is configured as one serving cell.