WO2013004127A1 - Data transmission method and device in carrier aggregation system - Google Patents

Abstract

A data transmission method and device in a carrier aggregation system, which belong to the technical field of wireless communication, are provided in the embodiments of the invention for solving the problem of transmitting data by a User Equipment (UE) in a sub-frame whose uplink or downlink transmission direction is not ensured. In the invention, a terminal determines whether an uplink schedule signal corresponding to a sub-frame whose uplink or downlink transmission direction is not ensured is received from a base station, and according to the determination result, the terminal uses the sub-frame whose uplink or downlink transmission direction is not ensured to transmit uplink data or receive downlink data. Thus it can be seen that, the terminal in the invention can determine how to transmit data in the sub-frame whose uplink or downlink transmission direction is not ensured according to judging whether an uplink schedule signal is received, so that the problem of transmitting data in the sub-frame whose uplink or downlink transmission direction is not ensured by a UE which cannot support simultaneous uplink and downlink transmission is solved.

Description

 The present invention claims the Chinese patent application filed on July 1, 2011 by the Chinese Patent Office, Application No. 201110185250.3, entitled "Data Transmission Method and Apparatus in Carrier Aggregation System". Priority is hereby incorporated by reference in its entirety.

Technical field

 The present invention relates to the field of wireless communications, and in particular, to a data transmission method and device in a carrier aggregation system. Background technique

 In the Long Term Evolution (LTE) system and the previous wireless communication system, there is only one carrier in one cell, and the maximum bandwidth in the LTE system is 20 MHz, as shown in FIG.

 In the LTE-A (LTE-Advanced) system, the peak rate of the system is much higher than that of the LTE system, requiring downlink lGbps and uplink 500 Mbps. If only one carrier with a maximum bandwidth of 20MHz is used, the peak rate requirement cannot be reached. Therefore, the LTE-A system needs to expand the bandwidth that the terminal can use, thereby introducing Carrier Aggregation (CA) technology, which is to aggregate multiple consecutive or discontinuous carriers under the same base station (eNodeB, eNB). At the same time, it serves the terminal (User Equipment, UE) to provide the required rate. These aggregated carrier forks are called component carriers (CCs). Each cell can be a member carrier, and cells (member carriers) under different eNBs cannot be aggregated. In order to ensure that UEs of LTE can work under each aggregated carrier, each carrier does not exceed 20 MHz at most. The CA technology of LTE-A is shown in Figure 2.

 The LTE-A base station shown in Figure 2 has four carriers that can be aggregated. The base station can perform data transmission with the UE on four carriers at the same time to improve system throughput.

 In the LTE system, Frequency Division Duplex (FDD) and Time Division Duplex (TDD) modes are one radio frame 10ms, one subframe lms. For each TDD radio frame, seven TDD uplink/downlink subframe configurations are defined, as shown in Table 1 below, where D stands for Downlink (DL) subframe and U stands for Uplink (UL). Subframe, S represents a special subframe of the TDD system, for example, configuration 1 is DSUUDDSUUD.

TDD uplink/downlink subframe configuration In LTE Release 11 (Rel-11) or later systems, in order to avoid interference with other TDD systems, LTE cells located in different frequency bands (Band) may use different TDD uplink/downlink subframe configurations, as shown in Figure 3. .

 Carrier 1 and carrier 2 are located in Band A, carrier 3 is located in Band B, and cell 1, cell 2, and cell 3 are cells on carrier 1, carrier 2, and carrier 3, respectively. The configuration of the TDD uplink/downlink subframes of the cell 1 and the cell 2 is the same as that of the configuration 1. The configuration of the TDD uplink/downlink subframe of the cell 3 is different from that of the cell 1 and the cell 2. If the terminal wants to use these three cells for carrier aggregation, the TDD uplink and downlink configurations of all the aggregated cells of the terminal may be different.

 It should be noted that if one terminal can aggregate multiple bands, and different bands can support different TDD uplink/downlink subframe configurations, then the terminal generally uses different transceivers for different bands.

 In the process of implementing the present invention, the inventors have found that the following technical problems exist in the prior art:

 At present, after the aggregation of carriers using different TDD uplink/downlink configurations, it is not clear whether the UE that can support simultaneous uplink and downlink transmission works in the uplink and downlink overlapping subframes.

Summary of the invention

 The embodiment of the invention provides a data transmission method and device in a carrier aggregation system, which is used to solve the problem of how the UE performs data transmission in a subframe in which the uplink and downlink transmission directions are uncertain.

 A method for data transmission in a carrier aggregation system, the method comprising:

 The terminal determines whether to receive the uplink scheduling signaling sent by the base station for the subframe whose uplink and downlink transmission direction is uncertain; the terminal sends the uplink data or receives the downlink data by using the subframe with the uplink and downlink transmission direction uncertain according to the determination result.

 A method for scheduling data transmission in a carrier aggregation system, the method comprising:

 Before transmitting the downlink scheduling signaling of the subframe in which the uplink and downlink transmission directions are indeterminate, the base station determines whether to send the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;

 When it is determined that the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are indeterminate is sent, the downlink scheduling of the subframe in which the uplink and downlink transmission directions are uncertain is prohibited from being sent in the subframe where the uplink and downlink transmission directions are uncertain. Signaling.

 A terminal, the terminal comprising:

 a scheduling signaling determining unit, configured to determine whether to receive uplink scheduling signaling sent by the base station for a subframe that is determined by an uplink and downlink transmission direction;

 The signal transmission unit is configured to send uplink data or receive downlink data according to the determined result, using a subframe in which the uplink and downlink transmission directions are uncertain.

 A base station, the base station comprising:

 a determining unit, configured to determine whether to send uplink scheduling signaling of a subframe that is indeterminate in the uplink and downlink transmission direction before transmitting, to the terminal, the downlink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;

a processing unit, configured to: when determining, sending uplink scheduling signaling of a subframe that is indeterminate for the uplink and downlink transmission direction, Scheduling signaling.

 In the solution provided by the embodiment of the present invention, the terminal determines whether to receive the uplink scheduling signaling that is sent by the base station for the subframes whose uplink and downlink transmission directions are uncertain, and sends the subframes that are determined by the uplink and downlink transmission directions according to the determination result. Uplink data or receive downlink data. It can be seen that, in this solution, the terminal can determine, according to whether the uplink scheduling signaling is received, how to perform data transmission in the subframe with the uplink and downlink transmission direction uncertain, thereby solving the problem that the UE that cannot support simultaneous uplink and downlink transmission is uncertain in the uplink and downlink transmission directions. The problem of data transmission in the sub-frame.

DRAWINGS

 1 is a schematic diagram of carrier distribution of an LTE cell in the prior art;

 2 is a schematic diagram of a CA in an LTE-A system in the prior art;

 FIG. 3 is a schematic diagram of different TDD uplink/downlink subframe configurations used by different bands of the LTE-A CA terminal in the prior art;

 4 is a schematic flowchart of a method according to an embodiment of the present invention;

 FIG. 5 is a schematic flowchart of still another method according to an embodiment of the present disclosure;

 6 is a schematic diagram of uplink scheduling of a subframe in which an uplink and downlink transmission direction is indeterminate according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a device according to an embodiment of the present invention;

 FIG. 8 is a schematic structural diagram of another device according to an embodiment of the present invention.

detailed description

 In order to solve the problem of how the UE performs data transmission in a subframe in which the uplink and downlink transmission directions are uncertain, the embodiment of the present invention provides a data transmission method in a carrier aggregation system. In this method, the terminal determines how to perform uplink scheduling signaling according to the method. Data transmission is performed in subframes whose uplink and downlink transmission directions are uncertain. The UL grant is always sent in advance. For example, if the UL grant in the LTE system is to be sent at least 4 ms in advance, the UE can dynamically determine the subframes whose uplink and downlink transmission directions are uncertain before the arrival of the subframes whose uplink and downlink transmission directions are uncertain. The direction of transmission.

 A subframe in which the uplink and downlink transmission directions are indeterminate refers to a subframe in which there is no pre-configured or agreed transmission direction in the uplink and downlink overlapping subframes.

 The uplink and downlink overlapping subframes are: when the terminal aggregates multiple frequency bands and different frequency bands support different TDD uplink/downlink subframe configurations, if the transmission directions on different carriers in a certain subframe are inconsistent, the subframe is an uplink and downlink overlap subframe. frame. The uplink and downlink overlapping subframes that may appear in the LTE-A system include subframe 3, subframe 4, subframe 6, subframe 7, subframe 8, and subframe 9.

 Referring to FIG. 4, a method for data transmission in a carrier aggregation system according to an embodiment of the present invention includes the following steps: Step 40: The terminal determines whether an uplink scheduling signal sent by a base station for a subframe in which an uplink and downlink transmission direction is uncertain is received. Order (UL grant);

Step 41: The terminal sends uplink data or receives downlink data according to the determined result, using a subframe in which the uplink and downlink transmission directions are uncertain. As an implementation manner, if the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal corresponds to the uplink transmission carrier in the subframe where the uplink and downlink transmission directions are uncertain. A Physical Uplink Shared CHannel (PUSCH) is transmitted. Otherwise, the terminal detects a Physical Downlink Control CHannel (PDCCH) and/or a receiving physics on a carrier corresponding to the downlink transmission in the uplink and downlink overlapping subframe. The downlink shared channel (Physical Downlink Shared CHannel, PDSCH).

 As another implementation manner, if the terminal does not receive the uplink scheduling that is sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, for each subframe in the subframes in which the uplink and downlink transmission directions are not determined. Signaling, the terminal detects the PDCCH and/or receives the PDSCH on the carrier corresponding to the downlink transmission in each subframe in which the uplink and downlink transmission directions are uncertain;

 If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for at least one of the consecutive N uplink and downlink transmission directions, the terminal is not in the N subframes. Detecting a PDCCH and/or receiving a PDSCH in a critical subframe in a subframe in which the uplink and downlink transmission directions are indeterminate, and a subframe in the subframe before the critical subframe, and detecting a carrier on a downlink transmission in a subframe subsequent to the critical subframe PDCCH and/or receiving PDSCH; transmitting a PUSCH on a carrier corresponding to an uplink transmission in a subframe in which a corresponding uplink scheduling signaling is received in a subframe in which the uplink and downlink transmission directions are indeterminate; the critical subframe is the latest a subframe in which the uplink and downlink transmission directions corresponding to the received uplink scheduling signaling are indeterminate; the N is a positive integer.

 In another embodiment, if the terminal receives the uplink scheduling signaling that is sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and does not receive the base station, The downlink scheduling signaling sent by the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal sends the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain;

 If the terminal receives the downlink scheduling signaling that is sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. The uplink scheduling signaling sent by the subframe, the terminal detects the PDCCH and/or receives the PDSCH on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain;

 If the terminal does not receive the downlink scheduling signaling and the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the subframe is a blank subframe. The terminal does not detect the PDCCH and/or the PDSCH in the subframe in which the uplink and downlink transmission directions are uncertain, and does not send the PUSCH in the subframe in which the uplink and downlink transmission directions are not determined;

If the terminal receives the downlink scheduling signaling and the uplink scheduling signaling that are sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal follows the preset subframe. a method for determining a transmission direction, determining a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate, and if the transmission direction is uplink, transmitting a PUSCH on a carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, if If the transmission direction is downlink, the PDCCH and/or the reception is detected on the carrier corresponding to the downlink transmission in the subframe where the uplink and downlink transmission directions are uncertain. PDSCH.

 This embodiment can be applied to the multi-subframe scheduling or the cross-subframe scheduling mode, because in this mode, the UE can know all the subframes whose uplink and downlink transmission directions are uncertain before the arrival of the subframe with the uplink and downlink transmission directions is uncertain. Scheduling information (including DL grant and UL grant).

 Specifically, the terminal determines the transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate according to the preset subframe transmission direction determining method, and the specific implementation may be as follows:

 First, the terminal determines, according to a preset transmission direction priority, a transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain;

 For example, the terminal determines the transmission direction with the highest priority according to the preset transmission direction priority. If the transmission direction with the highest priority is the uplink, the transmission direction of the subframe whose uplink and downlink transmission direction is uncertain is determined to be uplink. If the transmission direction with the highest priority is downlink, the transmission direction of the subframe with the uplink and downlink transmission direction is determined to be downlink.

 Second, the terminal determines the transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain according to the timing relationship between the downlink scheduling signaling and the uplink scheduling signaling sent by the received base station for the subframe in which the uplink and downlink transmission directions are uncertain. .

 For example, the terminal determines whether the scheduling signaling of the subframe that is determined to be in the uplink and downlink transmission direction is the downlink scheduling signaling or the uplink scheduling signaling, and if it is the uplink scheduling signaling, determining that the uplink and downlink transmission directions are not The transmission direction of the determined subframe is uplink, and if it is downlink scheduling signaling, it is determined that the transmission direction of the subframe whose uplink and downlink transmission direction is uncertain is downlink.

 Preferably, before the step 40, the terminal may perform one of the following two methods to determine the subframe determined by the transmission direction in the uplink and downlink overlapping subframe and the transmission direction corresponding to the subframe:

 First, when the deterministic signal configured by the base station or the transmission subframe of the channel coincides with the uplink and downlink overlapping subframe, the uplink and downlink overlapping subframe is a subframe determined by the transmission direction, and the terminal transmits according to the deterministic signal or channel. Direction, determining a transmission direction of the uplink and downlink overlapping subframes;

 Second, the base station configures the transmission direction of the uplink and downlink overlapping subframes by using the high layer signaling, and the terminal determines the transmission direction of the uplink and downlink overlapping subframes according to the high layer signaling configuration of the base station.

 Steps 40-41 are performed in the uplink and downlink transmission subframes that are determined by the above two methods, except for the subframes determined by the uplink and downlink transmission directions.

 An example of the above method one is as follows:

 If the deterministic signal or channel is a Scheduling Request (SR) or periodic Channel State Information (CSI) or a Semi-Persistent Scheduling PUSCH (SPS PUSCH) Or the sounding reference signal (SS), if the uplink and downlink overlapping subframes are in the uplink direction, the PDCCH and/or the receiving PDSCH are not detected in the uplink and downlink overlapping subframes;

If the deterministic signal or channel is a semi-persistently scheduled physical downlink shared channel (SPS PDSCH), then the upper If the transmission direction of the downlink overlapping subframe is downlink, detecting the PDCCH and/or receiving the PDSCH in the uplink and downlink overlapping subframe;

 If the deterministic signal or the channel is a physical random access (CHACH), if the subframe is a subframe 6, the uplink and downlink overlapping subframe is a special subframe, Detecting a PDCCH and/or receiving a PDSCH in a downlink special time slot in an uplink and downlink overlapping subframe, and transmitting a PRACH in an uplink special time slot in the uplink and downlink overlapping subframe; when the subframe is not a subframe 6, the Detecting PDCCH and/or receiving PDSCH in uplink and downlink overlapping subframes.

 In this method, the terminal sends an acknowledgement/not-acknowledgement (ACK/NACK) corresponding to the downlink data only in a subframe in which all carriers correspond to uplink transmission or uplink and downlink overlapping subframes used for uplink transmission. ; and / or,

 The terminal sends the ACK/NACK corresponding to the uplink data only in the subframe in which all the carriers correspond to the downlink transmission or the uplink and downlink overlapping subframes used for the downlink transmission.

 Referring to FIG. 5, an embodiment of the present invention further provides a data transmission scheduling method in a carrier aggregation system, including the following steps:

 Step 50: Before transmitting, to the terminal, the downlink scheduling signaling of the subframe that is determined by the uplink and downlink transmission directions, the base station determines whether to send the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;

 Step 51: When it is determined that the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are indeterminate is sent, the downlink scheduling signaling for the uplink and downlink overlapping subframes is prohibited from being sent in the subframe where the uplink and downlink transmission directions are uncertain. Therefore, the UE is prevented from simultaneously performing uplink and downlink data transmission in the subframe in which the uplink and downlink transmission directions are uncertain.

 If it is determined that the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are not determined is not sent, the downlink of the subframe in which the uplink and downlink transmission directions are uncertain may be sent in the subframe where the uplink and downlink transmission directions are uncertain. Scheduling signaling.

 The invention will be specifically described below:

 When inter-band carrier aggregation is performed, and the TDD uplink and downlink configurations on different bands are different, UEs that cannot support simultaneous uplink and downlink transmission may exist in subframes 3, 4, 6, D, 8, and 9. The situation where the lines overlap. The UL grant is always sent in advance. In the LTE system, the UL grant is sent at least 4 ms in advance. The UE can dynamically determine the transmission direction of the uplink and downlink overlapping subframes before the uplink and downlink overlapping subframes arrive. First, the uplink and downlink overlapping subframes can be classified into two types: an uplink and downlink overlapping subframe determined by the transmission direction and an uplink and downlink overlapping subframe with an uncertain transmission direction, where the uplink and downlink overlapping subframes determined by the transmission direction may not exist. The UE may know the uplink and downlink overlapping subframes determined by the transmission direction in advance according to the following two methods:

 Method 1: Determine the transmission direction of the uplink and downlink overlapping subframes according to the pre-configured deterministic signal or the transmission subframe of the channel; for example:

If the uplink and downlink overlapping subframes are overlapped with the subframes of the system that are configured to transmit, for example, the SR, the periodic CSI, the SPS PUSCH, and the SRS, the uplink and downlink overlapping subframes may be regarded as an uplink subframe. If the uplink and downlink overlapping subframes are overlapped with the semi-statically configured subframes for transmitting, for example, the SPS PDSCH, the uplink and downlink overlapping subframes may be regarded as downlink subframes;

 If the uplink and downlink overlapping subframes coincide with the PRACH transmission subframe, then:

 If the subframe is a subframe 6, the uplink and downlink overlapping subframes are special subframes, and the PDCCH and/or the PDSCH may be detected in a common downlink transmission part in the uplink and downlink overlapping subframes. For example, the subframe 6 in the band1 is a special subframe, and the Downlink Pilot Time Slot (DwPTS) occupies the first 19760Ts in the subframe, and the Uplink Pilot Time Slot (UpPTs) occupies the subframe. After 2192Ts, the subframe 2 in the band2 is the downlink subframe, then the UE can detect the PDCCH and/or receive the PDSCH in the first 19760Ts in the subframe 6 in the band1 and the band2, and the latter 2192 in the subframe 6 in the band1. The PRACH is transmitted in Ts.

 If the subframe is not the subframe 6, the uplink and downlink overlapping subframes are regarded as uplink subframes.

 Method 2: Determine the transmission direction of the uplink and downlink overlapping subframes according to the high layer configuration signaling of the base station.

 The uplink ACK/NACK (ie, the dynamically scheduled PDSCH, the SPS PDSCH, and the ACK/NACK corresponding to the PDCCH indicating the release of the SPS resource) are not transmitted in the uplink and downlink overlapping subframes whose transmission direction is uncertain, that is, only in all carriers. The uplink transmitted subframe (such as subframe 2 and subframe 7 in FIG. 6) or the UE determines to transmit in the uplink and downlink overlapping subframes for uplink transmission.

 The downlink ACK/NACK (ie, the ACK/NACK corresponding to the PUSCH) information is not transmitted in the uplink and downlink overlapping subframes whose transmission direction is uncertain, that is, the subframes corresponding to the downlink transmission only in all the carriers (such as the subframe in FIG. 6) 0, 1, 5, 6) or the UE determines to transmit in the uplink and downlink overlapping subframes for downlink transmission.

 Then, for the uplink and downlink overlapping subframes n, n+1, ..., n+k, where k > 0, for example, subframes 3, 4 and subframe 8 in FIG. 9, the following two methods are used to determine the transmission direction of the uplink and downlink overlapping subframes: Method 1: If the UE receives the UL grant corresponding to the subframe n+x ( 0 < X k ) before the subframe n, the UE will Transmitting a PUSCH on a subframe n+x in a carrier corresponding to the UL grant, not detecting a PDCCH and/or receiving a PDSCH on a carrier corresponding to the downlink transmission in the subframe; if the UE does not receive the corresponding sub-frame before the subframe n For the UL grant of frame n+x (( x < k ), the UE will detect the PDCCH and/or receive the PDSCH on the carrier corresponding to the downlink transmission in the above subframe.

 Method Two:

 If the UE receives the UL grant corresponding to the subframe n+x ( 0 < x < k ) before the subframe n, the UE does not detect the PDCCH and/or receive on the carrier corresponding to the downlink transmission in the subframes n ~ n+x PDSCH;

 If the UE does not receive the UL grant of the corresponding subframe n+x ~ n+k ( 0 X k ) before the subframe n, the UE detects the carrier on the downlink transmission in the subframe n+x - n+k PDCCH and/or receive PDSCH.

Further, if the system supports multi-subframe scheduling or cross-subframe scheduling, the UE can obtain all scheduling information (including DL grant and subframes of subframes with uncertain uplink and downlink transmission directions) before the arrival of the subframes with uncertain uplink and downlink transmission directions. UL grant), taking FIG. 6 as an example, the base station transmits the scheduling information corresponding to the carrier on the band2 through the carrier in the band1, then the UE The corresponding UL grant and DL grant can be known before the arrival of subframes 3 and 4, then:

 If the UE does not receive the corresponding UL grant and does not receive the corresponding DL grant for the overlapping subframe n+x, the UE may consider the subframe n+x as a blank subframe, and does not perform in the corresponding subframe. Data reception and transmission, thereby reducing UE power consumption;

 If the UE receives the corresponding UL grant for the uplink and downlink overlapping subframes n+x, but does not receive the corresponding DL grant,

The UE sends a PUSCH on the carrier corresponding to the uplink transmission in the subframe n+x;

 If the UE does not receive the corresponding UL grant for the uplink and downlink overlapping subframes n+x, but receives the corresponding DL grant, the UE detects the PDCCH and/or receives the carrier corresponding to the downlink transmission in the subframe n+x. PDSCH;

 If the eNB sends a DL grant and a UL grant to the same uplink and downlink overlapping subframe n+x, the base station can process the following:

 The system reserves a priority of the transmission direction. For example, the DL transmission takes precedence over the UL transmission, and after receiving the DL grant and the UL grant, the UE preferentially receives the DL data without performing the UL transmission; or

 According to the timing relationship of the scheduling signaling, the UE is based on the last received scheduling signaling, for example, the UL grant is sent in the subframe m0, the DL grant is sent in the subframe ml, and ml > mO, the UE preferentially receives the DL data. , without UL transmission.

 Embodiment 1:

 Corresponding to the above method one. As shown in FIG. 6, the UL grant corresponding to the subframe 8 is transmitted in the subframe 1, and the UL grant corresponding to the subframe 9 is transmitted on the subframe 5.

 If the UE receives the UL grant of the base station in the subframe 1, the UL grant is used to schedule the UE to transmit the PUSCH on the carrier of the band1 in the subframe 8, and the UL grant is not received in the subframe 5, the UE will be in the bandl. The PUSCH is transmitted on the subframe 8, and the PDCCH and/or the received PDSCH are detected in the subframe 9 of the band 2.

 If the UE does not receive the UL grant of the base station in subframe 1, and receives the UL grant in subframe 5, the UE will detect the PDCCH and/or receive the PDSCH in subframe 8 in band2, and the subframe in bandl The PUSCH is transmitted on 9.

 If the UE does not receive the UL grant of the base station in both subframes 1 and 5, the UE will detect the PDCCH and/or receive the PDSCH in subframes 8 and 9 on band2.

 If the UE receives the UL grant of the base station in both subframes 1 and 5, the UE will transmit the PUSCH in subframes 8 and 9 on bandl.

 Embodiment 2:

 Corresponding to the above method two.

 If the UE receives the UL grant of the base station in the subframe 5, the UL grant is used to schedule the UE to transmit the PUSCH on the carrier of the band1 in the subframe 9, the UE considers the subframes 8 and 9 as the uplink subframe, and The carrier on band 2 detects the PDCCH and/or receives the PDSCH.

If the UE does not receive the UL grant of the base station in both subframes 1 and 5, the UE considers subframes 8 and 9 as downlinks. The frame will detect the PDCCH and/or receive the PDSCH on the carrier on the band 2 in the above subframe.

 If the UE receives the UL grant of the base station in the subframe 1, the UL grant is used to schedule the UE to transmit the PUSCH on the carrier of the band1 in the subframe 8, and the UL grant is not received in the subframe 5, the UE views the subframe 8 It is an uplink subframe, and subframe 9 is regarded as a downlink subframe.

 Based on the same inventive concept, a terminal is also provided in the embodiment of the present invention. The principle of the terminal is similar to the data transmission method in the carrier aggregation system of the embodiment of the present invention. Therefore, the implementation of the terminal can be implemented by referring to the method. It will not be repeated here.

 Referring to FIG. 7, an embodiment of the present invention further provides a terminal, where the terminal includes:

 The scheduling signaling determining unit 70 is configured to determine whether to receive uplink scheduling signaling sent by the base station for a subframe in which the uplink and downlink transmission directions are uncertain;

 The signal transmission unit 71 is configured to send uplink data or receive downlink data by using a subframe in which the uplink and downlink transmission directions are uncertain according to the determination result.

 The signal transmission unit 71 is used to:

 If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal sends the uplink data to the uplink transmission carrier in the subframe where the uplink and downlink transmission direction is uncertain, otherwise, The terminal receives the downlink data on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, and detects the PDCCH.

 The signal transmission unit 71 is used to:

 If the terminal does not receive the uplink scheduling signaling sent by the base station for the uplink and downlink overlapping subframes for each of the consecutive N uplink and downlink transmission direction subframes, the terminal overlaps each uplink and downlink. Detecting a PDCCH and/or receiving a PDSCH on a carrier corresponding to a downlink transmission in a frame;

 If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for at least one of the consecutive N uplink and downlink transmission direction uncertain subframes, the terminal does not Detecting a PDCCH and receiving a PDSCH in a critical subframe in a subframe in which the transmission direction is uncertain, and a subframe in the subframe before the critical subframe, and detecting PDCCH and receiving on a carrier corresponding to downlink transmission in a subframe subsequent to the critical subframe The PDSCH is sent on a carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission signaling is received in the subframes where the uplink and downlink transmission directions are undefined; the critical subframe is the latest received uplink scheduling. The subframe corresponding to the uplink and downlink transmission direction is not determined by the signaling; the N is a positive integer.

 The signal transmission unit 71 is used to:

If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. The downlink scheduling signaling sent by the subframe transmits the PUSCH on the carrier corresponding to the uplink transmission in the uplink and downlink overlapping subframe; if the terminal receives the uplink and downlink before the subframe with the uplink and downlink transmission direction is uncertain Downlink scheduling signaling delivered by a subframe with an undetermined transmission direction, and not received by the base station for a subframe that is uncertain for the uplink and downlink transmission direction Sending the uplink scheduling signaling, and receiving the detection PDCCH and/or receiving the PDSCH on the carrier corresponding to the downlink transmission in the uplink and downlink overlapping subframe;

 If the terminal does not receive the downlink scheduling signaling and the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the subframe is a blank subframe. Transmitting a PUSCH in a subframe in which the uplink and downlink transmission directions are not determined, and detecting a PDCCH and/or receiving a PDSCH, and not in a subframe in which the uplink and downlink transmission directions are not determined;

 If the terminal receives the downlink scheduling signaling and the uplink scheduling signaling that are sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, before the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal transmits according to the preset subframe. The direction determining method determines a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate. If the transmission direction is uplink, the PUSCH is transmitted on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, if the transmission is performed. If the direction is downlink, the PDCCH and/or the receiving PDSCH are detected on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain.

 The signal transmission unit 71 is used to:

 Determining a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate according to a preset transmission direction priority; or

 And determining, according to the configuration signaling of the received base station, a transmission direction of the uplink and downlink overlapping subframe.

 The terminal also includes:

 The subframe transmission direction determining unit 72 is configured to further determine, in the uplink and downlink overlapping subframes, before the scheduling signaling determining unit determines whether to receive the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are uncertain. The subframe determined by the row transmission direction and the transmission direction of the subframe include:

 And determining, when the deterministic signal or the transmission subframe of the channel is overlapped with the uplink and downlink overlapping subframes, determining a transmission direction of the uplink and downlink overlapping subframes according to the deterministic signal or a transmission direction of the channel; or

 The transmission direction of the uplink and downlink overlapping subframes is determined according to the high layer signaling configuration of the base station.

 The subframe transmission direction determining unit 72 is configured to:

 If the deterministic signal or the channel is the scheduling request SR or the periodic channel state information CSI or the semi-persistently scheduled physical uplink shared channel SPS PUSCH or the uplink sounding signal SRS, the uplink and downlink overlapping subframes are transmitted in the uplink direction. Not detecting the PDCCH and/or receiving the PDSCH in the uplink and downlink overlapping subframe; or

 If the deterministic signal or channel is a semi-persistently scheduled physical downlink shared channel SPS PDSCH, the transmission direction of the uplink and downlink overlapping subframe is downlink, and the PDCCH and/or the receiving PDSCH are detected in the uplink and downlink overlapping subframe; Or,

If the deterministic signal or the channel is the physical random access channel (PRACH), when the subframe is the subframe 6, the uplink and downlink overlapping subframe is a special subframe, and the downlink is in the uplink and downlink overlapping subframe. The special time slot detects the PDCCH and/or receives the PDSCH, and transmits the PRACH in the uplink special time slot in the uplink and downlink overlapping subframe; the subframe is not a subframe. At 6 o'clock, the transmission direction of the uplink and downlink overlapping subframe is uplink, and the PDCCH and/or the PDSCH are not detected in the uplink and downlink overlapping subframe.

 The signal transmission unit 71 is used to:

 Sending ACK/NACK corresponding to the downlink data only in the subframe in which all carriers correspond to the uplink transmission or the uplink and downlink overlapping subframes used for the uplink transmission; and/or,

 The ACK/NACK corresponding to the uplink data is transmitted only in the subframe in which all the carriers correspond to the downlink transmission or the uplink and downlink overlapping subframes used for the downlink transmission.

 Based on the same inventive concept, a base station is also provided in the embodiment of the present invention. The principle of the base station solving the problem is similar to the data transmission scheduling method in the carrier aggregation system of the embodiment of the present invention. Therefore, the implementation of the base station can refer to the implementation of the method. The repetitions are not repeated here.

 Referring to FIG. 8, an embodiment of the present invention further provides a base station, where the base station includes:

 The determining unit 80 is configured to determine, before sending, to the terminal, the downlink scheduling signaling of the subframe in which the uplink and downlink transmission directions are indeterminate, whether to send the uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;

 The processing unit 81 is configured to: when determining to send the uplink scheduling signaling of the subframe that is indeterminate in the uplink and downlink transmission direction, prohibit sending the uplink and downlink transmission directions in the subframe where the uplink and downlink transmission directions are uncertain. Downlink scheduling signaling for subframes.

 In summary, the beneficial effects of the present invention include:

 In the solution provided by the embodiment of the present invention, the terminal determines whether to receive the uplink scheduling signaling that is sent by the base station for the subframes whose uplink and downlink transmission directions are uncertain, and sends the subframes that are determined by the uplink and downlink transmission directions according to the determination result. Uplink data or receive downlink data. It can be seen that, in this solution, the terminal can determine, according to whether the uplink scheduling signaling is received, how to perform data transmission in the subframe with the uplink and downlink transmission direction uncertain, thereby solving the problem that the UE that cannot support simultaneous uplink and downlink transmission is uncertain in the uplink and downlink transmission directions. The problem of data transmission in the sub-frame.

 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. To implement the functions specified in one or more blocks of a flow or a flow and/or block diagram of a flowchart Device.

 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

 Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request  A method for data transmission in a carrier aggregation system, the method comprising:  The terminal determines whether to receive the uplink scheduling signaling sent by the base station for the subframe whose uplink and downlink transmission direction is uncertain; the terminal sends the uplink data or receives the downlink data by using the subframe with the uplink and downlink transmission direction uncertain according to the determination result.  The method of claim 1, wherein the terminal determines whether to receive uplink scheduling signaling sent by the base station for a subframe in which the uplink and downlink transmission directions are uncertain; the terminal uses the uplink and downlink according to the determination result. Sending uplink data or receiving downlink data in a subframe whose transmission direction is uncertain includes:  If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal sends the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, otherwise, the terminal The PDCCH and/or the received PDSCH are detected on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain.  The method according to claim 1, wherein the terminal determines whether to receive the uplink scheduling signaling that is sent by the base station for the subframe whose uplink and downlink transmission direction is uncertain; the terminal uses the uplink and downlink according to the determination result. Sending uplink data or receiving downlink data in a subframe whose transmission direction is uncertain includes:  If the terminal does not receive the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for each of the consecutive N uplink and downlink transmission direction subframes, the terminal is in each Detecting a PDCCH and/or receiving a PDSCH on a carrier corresponding to a downlink transmission in a subframe in which the uplink and downlink transmission directions are indeterminate;  If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for at least one of the consecutive N uplink and downlink transmission directions, the terminal is not in the N subframes. Detecting a PDCCH and/or receiving a PDSCH in a critical subframe in a subframe in which the uplink and downlink transmission directions are indeterminate, and a subframe in the subframe before the critical subframe, and receiving the carrier on a downlink transmission in a subframe subsequent to the critical subframe Detecting a PDCCH and/or receiving a PDSCH; transmitting a PUSCH on a carrier corresponding to an uplink transmission in a subframe in which a corresponding uplink scheduling signaling is received in a subframe in which the uplink and downlink transmission directions are undefined; the critical subframe is the most The subframe that is received by the uplink scheduling signaling corresponding to the uplink and downlink transmission direction is indeterminate; the N is a positive integer.  The method according to claim 1, wherein the terminal determines whether to receive uplink scheduling signaling that is sent by the base station for a subframe in which the uplink and downlink transmission directions are uncertain; the terminal uses the uplink and downlink according to the determination result. Sending uplink data or receiving downlink data in a subframe whose transmission direction is uncertain includes:  If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. The downlink scheduling signaling sent by the subframe, the terminal sends the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain; If the terminal receives the downlink scheduling signaling that is sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. Subframe If the uplink scheduling signaling is sent, the terminal detects the PDCCH and/or receives the PDSCH on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain;  If the terminal does not receive the downlink scheduling signaling and the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the subframe is a blank subframe. The terminal does not detect the PDCCH and/or the PDSCH in the subframe in which the uplink and downlink transmission directions are uncertain, and does not send the PUSCH in the subframe in which the uplink and downlink transmission directions are not determined;  If the terminal receives the downlink scheduling signaling and the uplink scheduling signaling that are sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal follows the preset subframe. a transmission direction determining method, determining a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate, and if the transmission direction is uplink, transmitting a PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, if If the transmission direction is downlink, the PDCCH and/or the reception PDSCH are detected on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain.  The method according to claim 4, wherein the determining, by the terminal, the transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain according to the preset subframe transmission direction determining method includes:  Determining, by the terminal, a transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain according to a preset transmission direction priority; or  The terminal determines the transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain according to the timing relationship between the downlink scheduling signaling and the uplink scheduling signaling delivered by the received base station for the subframe in which the uplink and downlink transmission directions are indeterminate.  The method according to claim 1, wherein the terminal determines whether to receive the uplink scheduling signaling sent by the base station for the subframe with the uplink and downlink transmission direction uncertainty, and further determines the uplink and downlink overlapping subframe. The subframe determined by the uplink and downlink transmission directions and the transmission direction of the subframe include:  When the deterministic signal or the transmission subframe of the channel is overlapped with the uplink and downlink overlapping subframes, the terminal determines the transmission direction of the uplink and downlink overlapping subframes according to the deterministic signal or the transmission direction of the channel; or  The terminal determines the transmission direction of the uplink and downlink overlapping subframes according to the high layer signaling configuration of the base station.  The method according to claim 6, wherein if the deterministic signal or channel is a scheduling request SR or periodic channel state information CSI or a semi-persistently scheduled physical uplink shared channel SPS PUSCH or an uplink sounding signal SRS, the transmission direction of the uplink and downlink overlapping subframe is uplink, and the terminal does not detect the PDCCH and/or receive the PDSCH in the uplink and downlink overlapping subframe; or  If the deterministic signal or channel is a semi-persistently scheduled physical downlink shared channel SPS PDSCH, the transmission direction of the uplink and downlink overlapping subframe is downlink, and the terminal detects PDCCH and/or receives in the uplink and downlink overlapping subframe. PDSCH; or, If the deterministic signal or channel is the physical random access channel P ACH, then: when the subframe is the subframe 6, the uplink and downlink overlapping subframe is a special subframe, and the terminal is in the uplink and downlink overlap Downlink special time slot check in the frame The PDCCH and/or the receiving PDSCH, the PRACH is sent in the uplink special time slot in the uplink and downlink overlapping subframe; when the subframe is not the subframe 6, the transmission direction of the uplink and downlink overlapping subframe is uplink, the terminal The PDCCH and/or the received PDSCH are not detected in the uplink and downlink overlapping subframe.  8. The method of claim 1, wherein the method further comprises:  The terminal sends the ACK/NACK corresponding to the downlink data only in the subframe in which all the carriers correspond to the uplink transmission or the uplink and downlink overlapping subframes used for the uplink transmission; and/or,  The terminal sends the ACK/NACK corresponding to the uplink data only in the subframe in which all the carriers correspond to the downlink transmission or the uplink and downlink overlapping subframes used for the downlink transmission.  A method for scheduling data transmission in a carrier aggregation system, the method comprising: determining, by the base station, whether to send a pair of downlink scheduling signaling to a subframe in which the uplink and downlink transmission directions are uncertain Uplink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;  When it is determined that the uplink scheduling signaling of the subframe is sent, the downlink scheduling signaling of the subframe whose uplink and downlink transmission direction is uncertain is prohibited from being sent in the subframe where the uplink and downlink transmission directions are uncertain.  A terminal, characterized in that the terminal comprises:  a scheduling signaling determining unit, configured to determine whether to receive uplink scheduling signaling sent by the base station for a subframe that is determined by an uplink and downlink transmission direction;  The signal transmission unit is configured to send uplink data or receive downlink data according to the determined result, using a subframe in which the uplink and downlink transmission directions are uncertain.  The terminal according to claim 10, wherein the signal transmission unit is configured to:  If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal sends the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, otherwise, the terminal The PDCCH and/or the received PDSCH are detected on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain.  The terminal according to claim 10, wherein the signal transmission unit is configured to:  If the terminal does not receive the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for each of the consecutive N uplink and downlink transmission direction uncertain subframes, Detecting a PDCCH and/or receiving a PDSCH on a carrier corresponding to a downlink transmission in a subframe in which the uplink and downlink transmission directions are indeterminate; If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate for at least one of the consecutive N uplink and downlink transmission direction uncertain subframes, the terminal does not Detecting a PDCCH and/or receiving a PDSCH in a critical subframe in a subframe in which the transmission direction is uncertain, and a subframe in the subframe before the critical subframe, and detecting a PDCCH on a carrier corresponding to the downlink transmission in a subframe subsequent to the critical subframe And/or receiving the PDSCH; transmitting the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the corresponding uplink scheduling signaling is received in the subframes where the uplink and downlink transmission directions are uncertain; the critical subframe is the latest reception. The subframe corresponding to the uplink scheduling signaling corresponding to the uplink and downlink transmission direction is indeterminate; the N is a positive integer. The terminal according to claim 10, wherein the signal transmission unit is configured to:  If the terminal receives the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. The downlink scheduling signaling sent by the subframe transmits the PUSCH on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain;  If the terminal receives the downlink scheduling signaling that is sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, and the base station does not receive the uplink and downlink transmission direction, the terminal does not receive the uplink and downlink transmission direction. The uplink scheduling signaling sent by the subframe detects the PDCCH and/or the received PDSCH on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain;  If the terminal does not receive the downlink scheduling signaling and the uplink scheduling signaling sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, the subframe is a blank subframe. And detecting, in the subframe in which the uplink and downlink transmission directions are indeterminate, the PDCCH and/or the receiving PDSCH, and not transmitting the PUSCH in the subframe in which the uplink and downlink transmission directions are not determined;  If the terminal receives the downlink scheduling signaling and the uplink scheduling signaling that are sent by the base station for the subframe in which the uplink and downlink transmission directions are indeterminate, before the subframe in which the uplink and downlink transmission directions are indeterminate, the terminal transmits according to the preset subframe. The direction determining method determines a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate. If the transmission direction is uplink, the PUSCH is transmitted on the carrier corresponding to the uplink transmission in the subframe in which the uplink and downlink transmission directions are uncertain, if the transmission is performed. If the direction is downlink, the PDCCH and/or the receiving PDSCH are detected on the carrier corresponding to the downlink transmission in the subframe in which the uplink and downlink transmission directions are uncertain.  The terminal according to claim 13, wherein the transmission unit determines a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate according to a preset subframe transmission direction determining method, and is used to:  Determining a transmission direction of the subframe in which the uplink and downlink transmission directions are indeterminate according to a preset transmission direction priority; or  The transmission direction of the subframe in which the uplink and downlink transmission directions are uncertain is determined according to the timing relationship between the downlink scheduling signaling and the uplink scheduling signaling delivered by the received base station for the subframe in which the uplink and downlink transmission directions are indeterminate.  The terminal according to claim 10, wherein the terminal further comprises:  a subframe transmission direction determining unit, configured to further determine, in the uplink and downlink overlapping subframes, uplink and downlink in the uplink and downlink overlapping subframes, before determining, by the scheduling signaling determining unit, whether the uplink scheduling signaling sent by the base station for the uplink and downlink transmission direction is determined is received The subframe determined by the transmission direction and the transmission direction of the subframe include:  And determining, when the deterministic signal or the transmission subframe of the channel is overlapped with the uplink and downlink overlapping subframes, determining a transmission direction of the uplink and downlink overlapping subframes according to the deterministic signal or a transmission direction of the channel; or  The transmission direction of the uplink and downlink overlapping subframes is determined according to the high layer signaling configuration of the base station. The terminal according to claim 15, wherein the subframe transmission direction determining unit is configured to: If the deterministic signal or the channel is the scheduling request SR or the periodic channel state information CSI or the semi-persistently scheduled physical uplink shared channel SPS PUSCH or the uplink sounding signal SRS, the uplink and downlink overlapping subframes are transmitted in the uplink direction. Not detecting the PDCCH and/or receiving the PDSCH in the uplink and downlink overlapping subframe; or  If the deterministic signal or channel is a semi-persistently scheduled physical downlink shared channel SPS PDSCH, the transmission direction of the uplink and downlink overlapping subframe is downlink, and the PDCCH and/or the receiving PDSCH are detected in the uplink and downlink overlapping subframe; Or,  If the deterministic signal or channel is the physical random access channel P ACH, then: when the subframe is the subframe 6, the uplink and downlink overlapping subframe is a special subframe, and the uplink and downlink overlapping subframes The downlink special time slot detects the PDCCH and/or the received PDSCH, and sends the PRACH in the uplink special time slot in the uplink and downlink overlapping subframe. When the subframe is not the subframe 6, the transmission direction of the uplink and downlink overlapping subframe is In the uplink, the PDCCH and/or the PDSCH are not detected in the uplink and downlink overlapping subframe.  The terminal according to claim 10, wherein the signal transmission unit is configured to:  Sending ACK/NACK corresponding to the downlink data only in the subframe in which all carriers correspond to the uplink transmission or the uplink and downlink overlapping subframes used for the uplink transmission; and/or,  The ACK/NACK corresponding to the uplink data is transmitted only in the subframe in which all the carriers correspond to the downlink transmission or the uplink and downlink overlapping subframes used for the downlink transmission.  18. A base station, the base station comprising:  a determining unit, configured to determine whether to send uplink scheduling signaling of a subframe that is indeterminate in the uplink and downlink transmission direction before transmitting, to the terminal, the downlink scheduling signaling of the subframe in which the uplink and downlink transmission directions are uncertain;  The processing unit is configured to schedule signaling when determining uplink scheduling signaling that sends a subframe that is indeterminate for the uplink and downlink transmission direction.