WO2018233694A1

WO2018233694A1 - Method and device for signal transmission and reception

Info

Publication number: WO2018233694A1
Application number: PCT/CN2018/092452
Authority: WO
Inventors: 郭志恒; 万蕾; 谢信乾
Original assignee: 华为技术有限公司
Priority date: 2017-06-22
Filing date: 2018-06-22
Publication date: 2018-12-27

Abstract

Provided are a method and device for signal transmission and reception. The method comprises: receiving, by a terminal apparatus, on a first time unit of a first carrier, and from a network apparatus, a first downlink signal, the first carrier being a TDD carrier; determining, according to the first time unit, a second time unit of a second carrier on which first feedback information of the first downlink signal is to be transmitted, wherein the second carrier is an FDD uplink carrier; and transmitting, to the network apparatus, the first feedback information on the penultimate symbol and/or the last symbol of the second time unit of the second carrier. Since feedback information of a downlink signal on a first carrier is transmitted on a second carrier, the need for the terminal apparatus to transmit an uplink signal on the first carrier is reduced, thereby increasing data transmission efficiency.

Description

Signal transmitting and receiving method and device

This application claims the priority of the Chinese Patent Application submitted to the China Patent Office on June 22, 2017, the application number is 201710482203.2, and the application name is "Signal Transmission and Receiving Method, Device", and submitted to China on August 8, 2017. Priority is claimed on Japanese Patent Application No. Serial No. No. No. No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The present application relates to communication technologies, and in particular, to a signal transmission and reception method and apparatus.

Background technique

In the evolution of wireless communication systems, the 5th Generation (5G) New Radio Interface (NR) system and the Long Term Evolution (LTE) system can be deployed simultaneously in the frequency band below 6 GHz. . A typical deployment method is: the NR system is deployed at a frequency of 3.5 GHz, and the LTE system is deployed at a frequency of 1.8 GHz. The terminal device can support dual connectivity (DC) communication, that is, the terminal device can work in both the LTE system and the NR system, wherein the terminal device adopts Time Division Duplex (TDD) at 1.8 GHz. At the GHz frequency, the terminal equipment adopts Frequency Division Duplex (FDD).

In the above scenario, when the terminal device sends uplink signals at 3.5 GHz and 1.8 GHz, the intermodulation interference between the 3.5 GHz and 1.8 GHz signals will seriously affect the terminal. The device receives the downlink signal performance of the LTE system at a frequency of 1.8 GHz. In order to avoid this problem, the existing standard stipulates that for a terminal device operating in the dual connectivity mode of the LTE system and the NR system, the terminal device only supports transmitting uplink signals only at one frequency point at the same time point, that is, when the terminal device When the uplink signal is transmitted at the 3.5 GHz frequency, the uplink signal is not transmitted at the 1.8 GHz frequency, and vice versa.

Considering that the NR system operates in the TDD mode at the 3.5 GHz frequency point, this requires that each uplink subframe/slot requires an acknowledgement (ACK) for the terminal device to feed back the received downlink signal to the network device. /None Acknowledge NACK. At this time, since the terminal device only supports transmitting the uplink signal at one frequency point, this makes the terminal unable to transmit signals on the uplink subframe/time slot of the LTE system that has time overlap with the NR system uplink time slot, which will lower the LTE system. Uplink performance. At the same time, since the terminal device may need to send the ACK/NACK of the downlink signal of the LTE system on the subframes, if the terminal device cannot transmit the signals on the subframes, the terminal device cannot receive the downlink subframe corresponding to the ACK/NACK. The downlink signal is fed back, which also reduces the downlink performance of the LTE system.

Summary of the invention

The present application provides a signal transmitting and receiving method and apparatus, which improve data transmission efficiency when a terminal device transmits information by using two carriers in a terminal device.

The first aspect of the present application provides a signal sending and receiving method, including:

The terminal device receives a first downlink signal from the network device on a first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a first subframe ;

Determining, by the terminal device, a second time unit for transmitting first feedback information of the first downlink signal on a second carrier, where the second carrier is an uplink carrier of a frequency division duplex FDD, The second time unit includes a second time slot or a second subframe;

The terminal device sends the first feedback information to the network device on a penultimate and/or last symbol of the second time unit of the second carrier.

Optionally, the terminal device determines a second time unit for transmitting feedback information of the downlink signal on the second carrier, including:

Determining, by the terminal device, the second time unit according to a correspondence between a time unit that receives the downlink signal of the first carrier and a time unit of the second carrier that sends feedback information of the downlink signal of the first carrier, The corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.

Optionally, the period of the uplink and downlink transmission direction of the first carrier is configured to be 2.5 milliseconds, the period of the uplink and downlink transmission direction is configured to include five time slots, and the third of the uplink and downlink transmission directions is configured. The time slots are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17) At least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).

Optionally, the period of the uplink and downlink transmission direction of the first carrier is configured to be 5 milliseconds, the period of the uplink and downlink transmission direction is configured to include 10 time slots, and the period of the uplink and downlink transmission direction is configured to be the fifth time. The time slot and the sixth time slot are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (12, 6, 13), (13, 7, 15), (16, 8, 17) At least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).

Optionally, the method further includes: when the second time unit overlaps with the first uplink time slot on the first carrier, the terminal device determines that the first uplink time slot is not in the first uplink time slot. The signal is transmitted on the last m symbols, where m has a value of 1 or 2.

Optionally, when the previous time slot adjacent to the first uplink time slot is a first downlink time slot, the terminal device determines that the next m time slots are not in the first downlink time slot. Receiving a signal on the symbol, or the terminal device determines that the signal is not transmitted on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, after the first downlink time slot The m symbols or the first m symbols of the first uplink time slot are guard intervals GP.

Optionally, the sending, by the terminal device, the first feedback information to the network device on the penultimate and/or last symbol of the second time unit of the second carrier, including:

Transmitting, by the terminal device, the first feedback information on a last symbol of the second time unit by using a subcarrier spacing of 15 KHz; or

The terminal device sends the first feedback information on a penultimate and/or last symbol of the second time unit by using a subcarrier spacing of 30 KHz.

Optionally, the first carrier is a carrier used by the first radio access technology, and the second carrier is a carrier used by the second radio access technology, where the terminal device passes the first radio access technology and The second radio access technology performs dual connectivity DC communication.

Optionally, the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology.

The second aspect of the present application provides a terminal device, including:

a receiving module, configured to receive, by using a network device, a first downlink signal on a first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a One subframe;

a determining module, configured to determine a second time unit for transmitting first feedback information of the first downlink signal on a second carrier, where the second carrier is an uplink carrier of a frequency division duplex FDD, where The second time unit includes a second time slot or a second subframe;

And a sending module, configured to send the first feedback information to the network device on a penultimate and/or last symbol of the second time unit of the second carrier.

Optionally, the determining module is specifically configured to: perform a correspondence between a time unit that receives the downlink signal of the first carrier and a time unit of the second carrier that sends feedback information of the downlink signal of the first carrier Determining the second time unit, wherein the corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.

Optionally, the determining module is further configured to: when the second time unit overlaps with the first uplink time slot on the first carrier, determine that the second time slot is not behind the first uplink time slot. The signal is transmitted on m symbols, where m has a value of 1 or 2.

Optionally, the determining module is further configured to: when the previous time slot adjacent to the first uplink time slot is a first downlink time slot, determine that the first downlink is not Receiving a signal on the last m symbols of the slot, or determining not to transmit a signal on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, the first downlink time slot The last m symbols or the first m symbols of the first uplink time slot are guard intervals GP.

Optionally, the sending module is specifically configured to: send the first feedback information on a last symbol of the second time unit by using a subcarrier spacing of 15 KHz; or use a subcarrier spacing of 30 KHz in the first The first feedback information is sent on the penultimate and/or last symbol of the second time unit.

A third aspect of the present application provides a terminal device, including: a processor, a memory, a receiver, and a transmitter, where the memory, the receiver, and the transmitter are connected and communicated with the processor through a bus, the memory For storing computer execution instructions, the processor is configured to execute the computer execution instructions to cause the terminal device to perform the method provided by the first aspect above.

A fourth aspect of the present application provides a signal sending and receiving method, including:

The network device sends a first downlink signal to the terminal device on the first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a first subframe ;

The network device receives first feedback information of the first downlink signal that is sent by the terminal device on a second and/or last symbol of a second time unit of the second carrier.

Optionally, the method further includes: the network device sending, to the terminal device, a time unit for receiving a downlink signal of the first carrier and a second carrier for transmitting feedback information of a downlink signal of the first carrier The correspondence between the time units determines the second time unit, wherein the corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.

A fifth aspect of the present application provides a network device, including:

a sending module, configured to send, by using a first time unit of the first carrier, a first downlink signal, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a One subframe;

And a receiving module, configured to receive first feedback information of the first downlink signal that is sent by the terminal device on a second and/or last symbol of a second time unit of the second carrier.

Optionally, the sending module is further configured to: send, to the terminal device, a time unit that receives a downlink signal of the first carrier and a time component of a second carrier that sends feedback information of a downlink signal of the first carrier The correspondence between the two determines a second time unit, wherein the corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.

A sixth aspect of the present application provides a network device, including: a processor, a memory, a receiver, and a transmitter, where the memory, the receiver, and the transmitter are connected and communicated with the processor through a bus, the memory And a processor for executing instructions to cause the network device to perform the method provided by the fourth aspect above.

In still another aspect, the present application provides a communication system including the terminal device and the network device provided by the above aspects.

Yet another aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.

The method and device for transmitting and receiving a signal provided by the present application includes: receiving, by a terminal device, a first downlink signal from a network device on a first time unit of a first carrier, where the first carrier is a TDD carrier, and determining according to the first time unit a second time unit for transmitting first feedback information of the first downlink signal on the second carrier, where the second carrier is an uplink carrier of the FDD, and then the second and second of the second time unit of the second carrier / or the last symbol sends the first feedback message to the network device. By transmitting the feedback information of the downlink signal on the first carrier on the second carrier, the requirement for the terminal device to send the uplink signal on the first carrier is reduced, and the data transmission efficiency is improved.

DRAWINGS

Figure 1 is a schematic diagram of a DC scene;

2 is a flowchart of a signal transmitting and receiving method provided in Embodiment 1;

3 is a schematic diagram of a frame structure of an NR system and an LTE system;

4 is a schematic diagram of a correspondence relationship between a time unit of receiving a downlink signal of a first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier;

5 is another schematic diagram of a correspondence between a time unit of receiving a downlink signal of a first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier;

6 is another schematic diagram of a correspondence between a time unit of receiving a downlink signal of a first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier;

7 is another schematic diagram of a correspondence relationship between a time unit of receiving a downlink signal of a first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier;

8 is a schematic diagram of a frame structure of a time slot 7 of a first carrier;

9 is a schematic diagram of a frame structure of a slot 6 and a slot 7 of a first carrier;

10 is another schematic diagram of a frame structure of slot 1 and slot 2 of a first carrier;

11 is a flowchart of a method for transmitting and receiving signals according to Embodiment 2;

12 is a schematic structural diagram of a terminal device according to Embodiment 3;

FIG. 13 is a schematic structural diagram of a network device according to Embodiment 4;

14 is a schematic structural diagram of a terminal device according to Embodiment 5;

FIG. 15 is a schematic structural diagram of a network device according to Embodiment 5.

Detailed ways

The present application provides a signaling and receiving method, which can be applied in a Carrier Aggregation (CA) scenario and a Dual Connectivity (DC) scenario, where the DC scenario includes both terminal devices and The same wireless access technology accesses two different network devices, and the terminal device uses two different wireless access technologies to simultaneously access one network device or two network devices. Of course, the method can also be applied to other scenarios, which is not limited herein.

As a typical DC scenario, the terminal device can simultaneously access the New Radio Interface (NR) system and the Long Term Evolution (LTE) system. The NR system is also called the fifth generation mobile communication system (5-Generation). , 5G). The terminal device establishes a connection with the NR system by using the first carrier, and establishes a connection with the LTE system by using the second carrier and the third carrier. The first carrier is a Time Division Duplexing (TDD) carrier, and the frequency of the first carrier is, for example, 3.5 GHz. The second carrier is an uplink carrier of Frequency Division Duplexing (FDD), the third carrier is a downlink carrier of FDD, the frequency of the second carrier is, for example, 1.75 GHz, and the frequency of the third carrier is, for example, 1.85 GHz. The duplex type and carrier frequency of the carrier herein are merely illustrative, and the duplex type and frequency of the first carrier, the second carrier, and the third carrier are not limited thereto.

FIG. 1 is a schematic diagram of a DC scenario. As shown in FIG. 1 , the DC scenario includes: a core network, an access network, and a terminal device. The core network element includes: a Mobility Management Entity (MME) and a Serving GateWay (SGW). The access network element includes: a first base station and a second base station, where the first base station is in the LTE system. An evolved base station (Evolved NodeB, eNB), and the second base station is a base station of the NR system. In the scenario shown in Figure 1, the NR system and the LTE system share a core network. Of course, in other scenarios, the NR system and the LTE system may each have their own independent core networks. In the DC scenario, the terminal device accesses the two first base stations and the second base station at the same time, and the data sent by the core network may be offloaded by the first base station or the second base station in a Packet Data Convergence Protocol (PDCP) layer. .

In a CA scenario, a terminal device communicates with a base station through a primary component carrier (PCC) and at least one secondary component carrier (SCC). The base station may be an eNB in an LTE system or a base station in an NR system. The primary component carrier is also referred to as the primary carrier, and the secondary component carrier is referred to as the secondary carrier.

The terminal device referred to in this application may be a wireless terminal, which may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem. The wireless terminal can communicate with at least one core network via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, The wireless access network exchanges voice and/or data. A wireless terminal may also be called a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile Station, a Remote Station, an Access Point, and a remote terminal. The terminal (Remote Terminal), the access terminal (Access Terminal), the user terminal (User Terminal), the user equipment (User Equipment, UE), or the user agent (User Agent) are not limited herein.

2 is a flowchart of a method for transmitting and receiving a signal according to Embodiment 1. As shown in FIG. 1, the method provided in this embodiment includes the following steps:

Step S101: The terminal device receives the first downlink signal from the network device on the first time unit of the first carrier, where the first carrier is a TDD carrier, and the first time unit includes a first time slot or a first subframe.

Step S102: The terminal device determines a second time unit for transmitting first feedback information of the first downlink signal on the second carrier, where the second carrier is an uplink carrier of the FDD, and the second time unit includes the second time slot. Or the second subframe.

In this embodiment, the DC scenario is taken as an example. The first carrier is a carrier used by the first radio access technology, and the second carrier is a carrier used by the second radio access technology, and the first radio access technology is, for example, an NR system. The access technology adopted, the second radio access technology is, for example, a radio access technology adopted by the LTE system.

3 is a schematic diagram of a frame structure of an NR system and an LTE system. As shown in FIG. 3, a radio frame (Frame) of an LTE system includes 10 subframes, numbered from 0 to 9, and one subframe includes two subframes. Slot, so a radio frame of the LTE system contains 20 time slots, numbered from 0 to 19. For the NR system, one radio frame is 10 ms, one radio frame includes 10 subframes, and one subframe is 1 ms. The number of slots included in one subframe is related to the value of subcarrier spacing (SCS). When the subcarrier spacing is 15 kHz, one subframe contains one or two time slots, and when the subcarrier spacing is 30 kHz, one subframe contains two or four time slots. Of course, the spacing of subcarriers in the NR system is not limited to 15 kHz and 30 kHz. For the example of FIG. 3, it should be understood that when the subcarrier spacing is 30 kHz, one subframe includes two slots, and when the subcarrier spacing is 15 kHz, one subframe includes one slot, so in the example of FIG. 3, NR One radio frame contains 20 time slots, and the time slot number is 0-19, where D represents a downlink time slot, U represents an uplink time slot, and S represents a special time slot, which can be understood as being different from D and U. A time slot, for example, a special time slot can be understood as a time slot that can be used for both uplink transmission and downlink transmission, and is not limited herein. Of course, the number of slots included in one radio frame of the NR is not limited to 20, and the type of each slot is not limited to FIG.

Referring to FIG. 3, in the prior art, the feedback information of the downlink signal on the first carrier can only be fed back in the uplink subframe of the first carrier, and the feedback information of the downlink signal on the third carrier can only be fed back on the second carrier. . The feedback information of the downlink signal is an ACK message or a NACK message. Since the terminal device only supports transmitting the uplink signal on one carrier or frequency point, this makes it impossible for the terminal to transmit a signal on the uplink subframe/time slot of the second carrier that has time overlap with the uplink time slot of the first carrier, which will be reduced. Uplink performance of LTE systems. At the same time, since the terminal device may need to send the ACK/NACK of the downlink signal of the LTE system on the subframes, if the terminal device cannot transmit the signals on the subframes, the terminal device cannot receive the downlink subframe corresponding to the ACK/NACK. The downlink signal is fed back, which also reduces the downlink performance of the LTE system. Of course, the terminal may also choose not to transmit a signal on the first carrier but transmit a signal on the second carrier, which will reduce the uplink performance of the NR system.

In order to solve the problem in the prior art, in this embodiment, the terminal device sends the feedback information of the downlink signal received on the first carrier through the second carrier, and therefore, the terminal device receives the first time unit on the first carrier. After the first downlink signal, a second time unit for transmitting the first feedback information of the first downlink signal on the second carrier needs to be determined.

In an implementation manner, the terminal device determines the second time unit according to a correspondence between a time unit that receives the downlink signal of the first carrier and a time unit of the second carrier that sends the feedback information of the downlink signal of the first carrier, where The correspondence is determined according to the uplink and downlink transmission direction configuration of the first carrier. It should be understood that the uplink and downlink transmission direction configuration may include a transmission direction of one or more radio frames, and may also include one or more subframes, time slots, mini-slots, transmission directions of OFDM or DFT-S-OFDM symbols, of course. The transmission direction of other time lengths may also be included, which is not limited herein. The transmission direction includes uplink, and also includes downlink, and also includes a guard interval, that is, no signal is transmitted or received. The corresponding relationship may be pre-configured in the terminal device, or may be notified to the terminal device by the network side device through high layer signaling, for example, Radio Resource Control (RRC) layer signaling. A plurality of corresponding relationships may be pre-configured in the terminal device, and the network side device notifies the terminal device by signaling, and uses one of the plurality of corresponding relationships.

In another implementation manner, the indication information of the second time unit is carried in the Downlink Control Information (DCI), and is sent by the network side device to the Physical-layer Downlink Control Channel (PDCCH). Terminal Equipment.

The period of the uplink and downlink transmission direction configuration of the first carrier may be 2.5 ms, 5 ms, or 10 ms. The 2.5 ms period includes 5 time slots, the 5 ms period includes 10 time slots, and the 10 ms period includes 20 time slots. This embodiment does not limit the uplink and downlink transmission direction configuration of the first carrier. The uplink and downlink transmission direction configuration of 2.5 ms is, for example, "DSUDD" or "DDUDD", and the uplink and downlink transmission direction configuration of 5 ms is, for example, "DDDDUUDDDD".

The correspondence is obtained according to the uplink and downlink transmission direction of the first carrier, where the first carrier uses a subcarrier spacing of 30 kHz, the second carrier uses a subcarrier spacing of 15 kHz, and the period of the uplink and downlink transmission direction is 2.5 ms. The uplink and downlink transmission direction configuration includes five time slots, and the uplink and downlink transmission direction configurations of the five time slots are, for example, DDUDD, that is, the third time slot in the period in which the uplink and downlink transmission directions are configured is an uplink time slot. The remaining time slots are downlink time slots. 4 is a schematic diagram of a correspondence relationship between a time unit of receiving a downlink signal of a first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier, where the start end of the arrow in FIG. The time unit of the downlink signal of the first carrier, and the pointing end of the arrow is a time unit of the second carrier that sends the feedback information of the downlink signal of the first carrier, specifically, sending the feedback through the last two symbols of each subframe of the second carrier. Information, the last two symbols of each subframe of the second carrier belong to the next time slot of each subframe, therefore, it can also be said that the last two symbols of the second time slot of each subframe send feedback information, and send The symbol of the feedback information is the position shown by the black rectangular frame on the second carrier in FIG.

Referring to FIG. 4, the correspondence may be represented as (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal transmitting the first carrier. The subframe number of the time unit of the second carrier, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0) ,0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4 , 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17 ), at least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).

The first carrier adopts a subcarrier spacing of 30 kHz, the second carrier uses a subcarrier spacing of 15 kHz, and the period of the uplink and downlink transmission direction of the first carrier is 5 milliseconds as an example, and the period of the uplink and downlink transmission direction configuration includes 10 times. The uplink and downlink transmission direction configuration of the 10 time slots is, for example, DDDDUUDDDD, that is, the fifth time slot and the sixth time slot in the period configured in the uplink and downlink transmission direction are uplink time slots, and the remaining time slots are downlink time slots. . 5 is another schematic diagram of the correspondence between the time unit of receiving the downlink signal of the first carrier and the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the start end of the arrow in FIG. The time unit of receiving the downlink signal of the first carrier, the pointing end of the arrow is a time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier. Specifically, the feedback information is sent by the last two symbols of each subframe of the second carrier, and the last two symbols of each subframe of the second carrier belong to the next time slot of each subframe, and therefore, it can also be said that each sub- The last two symbols of the second time slot of the frame send feedback information, and the symbol for transmitting the feedback information is the position shown by the black rectangular frame on the second carrier in FIG.

Referring to FIG. 5, the correspondence may be represented as (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the downlink signal transmitting the first carrier. The subframe number of the time unit of the second carrier of the feedback information, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) Including (0,0,1), (1,1,3), (2,1,3), (3,2,5), (6,3,7),(7,4,9),( 8,4,9),(9,5,11),(10,5,11),(11,6,13),(12,6,13),(13,7,15),(16, 8,17), at least one of (17,9,19), (18,9,19), (19,0,1).

The terminal device may determine the second time unit according to the corresponding relationship and the number of the first time unit. For example, when the first time unit is the time slot 3 numbered as the first carrier, determining the second time according to the corresponding relationship. The unit is the second time slot of subframe 2 on the second carrier, or it is determined that the second time unit is time slot 5 on the second carrier. For (19, 0, 1), it should be understood that when the first time unit is a time slot numbered 19 on the first carrier, the second time unit is the second time of the subframe 0 of the next radio frame on the second carrier. Time slots.

It should be noted that the above two correspondences are only examples. When the uplink and downlink transmission direction configurations change, the corresponding relationship also changes accordingly. Alternatively, when one or more subframes on the second carrier are unavailable for the terminal device to send the feedback information of the downlink signal of the first carrier, the corresponding relationship may also change correspondingly, that is, one or more X corresponding Y and / or the value of Z changes.

Exemplarily, in the example shown in FIG. 4, if the terminal device cannot send the feedback information of the first carrier in the subframe 0 and the subframe 5 of the second carrier, the downlink signal received by the terminal device in the time slot 0 of the first carrier The feedback information cannot be sent on the subframe 0 of the second carrier, and the feedback information of the downlink signal received by the terminal device in the slot 9 and the slot 10 of the first carrier cannot be transmitted on the subframe 5 of the second carrier. Exemplarily, the terminal device may send the feedback information in the next available time unit of the subframe 0 and the subframe 5 of the second carrier, that is, the downlink signal of the slot 0 of the first carrier is transmitted on the subframe 1 of the second carrier. The feedback information is sent on the subframe 6 of the second carrier, and the feedback information of the downlink signal of the slot 9 and the slot 10 of the first carrier is transmitted, thereby obtaining the correspondence relationship shown in FIG. 6. As shown in Fig. 6, at this time, the values of the corresponding relationship (X, Y, Z) include (0, 1, 3), (1, 1, 3), (3, 2, 5), (4, 2). ,5),(5,3,7),(6,3,7),(8,4,9),(9,6,13),(10,6,13),(11,6,13 ), (13,7,15), (14,7,15), (15,8,17), (16,8,17), (18,9,19), (19,0,1) At least one group.

For another example, in the example shown in FIG. 5, if the terminal device cannot transmit the feedback information of the first carrier in the subframe 0, the subframe 2, and the subframe 5 of the second carrier, the terminal device receives the slot 0 of the first carrier. The feedback information of the downlink signal cannot be transmitted on the subframe 0 of the second carrier, and the feedback information of the downlink signal received by the terminal device in the time slot 3 of the first carrier cannot be transmitted on the subframe 2 of the second carrier, and the terminal device is The feedback information of the downlink signal received by slot 9 and slot 10 cannot be transmitted on subframe 5 of the second carrier. Exemplarily, the terminal device may send feedback information in units of the next available time of subframe 0, subframe 2, and subframe 5, that is, transmit the slot 0 of the first carrier on subframe 1 of the second carrier. Feedback information, transmitting feedback information of time slot 3 of the first carrier on subframe 3 of the second carrier, and transmitting feedback information of time slot 9 and time slot 10 of the first carrier on subframe 6 of the second carrier, thereby The correspondence shown in Fig. 7 is obtained. As shown in FIG. 7, the values of the corresponding relationship (X, Y, Z) include (0, 1, 3), (1, 1, 3), (2, 1, 3), (3, 3, 7). ), (6,3,7),(7,4,9),(8,4,9),(9,6,13),(10,6,13),(11,6,13), At least (12,6,13), (13,7,15), (16,8,17), (17,9,19), (18,9,19), (19,0,1) One group.

Optionally, the terminal device may obtain multiple different correspondences. When a certain subframe or a certain subframe on the second carrier cannot be used for the terminal device to send the feedback information of the downlink signal of the first carrier, the terminal device traverses. For other correspondences, the available correspondences are found, and the time unit for transmitting the feedback information on the second carrier is determined according to the available correspondence. Alternatively, the terminal device only stores one correspondence. When a certain subframe or a certain subframe on the second carrier cannot be used for the terminal device to send the feedback information of the downlink signal of the first carrier, the terminal device according to the preset rule and corresponding And determining, by the sending, the time unit for sending the feedback information on the second carrier, where the preset rule is, for example, the next available time of the subframe of the feedback information of the downlink signal that cannot be used by the terminal device to send the first carrier on the second carrier. The unit acts as a unit of time for sending feedback information.

It should be noted that the reason that the one or more subframes on the second carrier cannot be used for the terminal device to send the downlink information of the downlink signal of the first carrier may be that the terminal device needs to send the sounding reference signal on the one or more subframes. (Sounding Reference Signal, SRS), the SRS may be a periodic SRS or an aperiodic SRS. At this time, the value of the corresponding relationship (X, Y, Z) is related to the SRS configuration of the terminal device. When the SRS configuration of the terminal device changes, the value of the corresponding relationship is adjusted accordingly, that is, one Or the values of Y and/or Z corresponding to a plurality of Xs are changed. Certainly, the reason that the one or more subframes on the second carrier cannot be used for the terminal device to send the feedback information of the downlink signal of the first carrier may be other reasons, which is not limited herein.

In addition, the correspondence between the first time unit and the second time unit can be understood as a relationship in physical time. For example, when the first time unit is time slot 0 on the first carrier, the determined second time unit is the second carrier. The previous subframe 0, or the second slot of the subframe 0, at this time, the subframe 0 should be understood as a subframe that overlaps with the first time unit in time, when the number of the subframe 0 changes, The values of X, Y, Z) may vary, but the relative positions of the physical time in the first time unit and the second time unit remain unchanged.

Step S103: The terminal device sends the first feedback information to the network device on the penultimate and/or last symbol of the second time unit of the second carrier.

Specifically, the terminal device may send the first feedback information on the last symbol of the second time unit by using a subcarrier spacing of 15 KHz; or, the terminal device adopts a subcarrier spacing of 30 KHz in the second to last of the second time unit and/or Or send the first feedback message on the last symbol. The symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or may be a discrete Fourier transform extended OFDM (DFT-S-OFDM) symbol, or may be more than one OFDM. The symbol is shorter in length of time.

Optionally, in this embodiment, the subcarrier spacing of the first carrier is greater than the second subcarrier spacing, where the first carrier is the carrier of the NR system, the second carrier is the carrier of the LTE system, and the subcarrier of the LTE system is used. The interval of the first subcarrier should be 30 kHz. Of course, both the LTE system and the NR system can use a subcarrier spacing of 15 kHz, and the NR system can also use a subcarrier spacing greater than 30 kHz, such as 60 kHz.

In this embodiment, the second time unit may or may not overlap in time with the first uplink time slot on the first carrier. When the second time unit overlaps with the first uplink time slot on the first carrier in time, the terminal device determines that the signal is not transmitted on the last m symbols of the first uplink time slot, where the value of m is 1 or 2 Of course, there are other values. For example, in the example shown in FIG. 4, the last two symbols of the subframe 3 of the second carrier overlap with the time slot 7 of the first carrier, and the frame structure of the slot 7 of the first carrier is as shown in FIG. It is shown that the last two symbols of slot 7 are discarded, the symbols are discarded, ie the symbols cannot be used to transmit or receive signals, and the purpose of discarding the last two symbols of slot 7 is because the terminal needs corresponding symbol positions on the second carrier. Send ACK/NACK.

When the previous time slot adjacent to the first uplink time slot is the first downlink time slot, the terminal device determines that the signal is not received on the last m symbols of the first downlink time slot, or the terminal device determines Not transmitting signals on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, and the last m symbols of the first downlink time slot or the first m symbols of the first uplink time slot are understandable For the Guard Period (GP). By placing the location of the downlink to uplink switching point of the first carrier at the same location as transmitting the ACK/NACK on the second carrier, additional use of the time domain resource for downlink to uplink conversion can be avoided, thereby improving resources. Utilization rate. For example, in the example shown in FIG. 4, the last two symbols of the subframe 3 of the second carrier overlap with the time slot 7 of the first carrier, and the time slot 6 is the downlink time slot.

At this time, the frame structure of slot 6 and slot 7 of the first carrier is as shown in FIG. 9, the last two symbols of slot 7 are discarded, and the first two symbols of slot 7 or the last two of slot 6 The symbol is discarded, and the symbol is discarded. It should be understood that the signal is not sent or received on the symbol. The last two symbols of the slot 7 are discarded to ensure that the corresponding symbol position of the terminal device on the second carrier can normally send ACK/NACK and discard. The last two symbols of time slot 6 or the first two symbols of dropped time slot 7 are to ensure that the network device has sufficient time to complete the conversion from downlink transmission to uplink reception.

When the second time unit does not overlap with the first uplink time slot on the first carrier, and the previous time slot adjacent to the first uplink time slot is the first downlink time slot, the terminal device Determining that the signals are not received on the last m symbols of the first downlink time slot, or that the terminal device determines that the signals are not transmitted on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, of course There may be other values, and the last m symbols of the first downlink time slot or the first m symbols of the first uplink time slot may be understood as guard intervals. For example, in the example shown in FIG. 4, slot 2 of the first carrier does not overlap with subframe 1 of the second carrier, slot 2 is a downlink slot, and time slot 1 and time of the first carrier are used. The frame structure of slot 2 is as shown in FIG. 10, the last two symbols of slot 1 are discarded, or the first two symbols of slot 2 are discarded, and the symbols are discarded because they are understood to be incapable of being used for transmitting or receiving signals. The purpose of discarding the last two symbols of slot 1 or discarding the first two symbols of slot 2 is to allow time for the network device to transition from downlink to uplink reception. Since slot 2 does not overlap with subframe 1 of the second carrier in time, it is not necessary to discard the last two symbols of slot 2.

In this embodiment, the terminal device receives the first downlink signal from the network device on the first time unit of the first carrier, where the first carrier is a TDD carrier, and the first time unit determines to send the first message on the second carrier. a second time unit of the first feedback information of the downlink signal, where the second carrier is an uplink carrier of the FDD, and then to the network device on the second to last and/or last symbol of the second time unit of the second carrier Send the first feedback message. By transmitting the feedback information of the downlink signal on the first carrier on the second carrier, the requirement that the terminal device sends the uplink signal on the first carrier is reduced, so that the terminal device can be reduced to be simultaneously transmitted on the first carrier and the second carrier. In the case of the uplink signal, in the scenario where the terminal device performs DC communication with the NR system and the LTE system, the performance loss of the LTE system is greatly reduced.

FIG. 11 is a flowchart of a method for transmitting and receiving signals according to the second embodiment. As shown in FIG. 11, the method provided in this embodiment includes the following steps:

Step S201: The network device sends a first downlink signal to the terminal device on the first time unit of the first carrier, where the first carrier is a TDD carrier, and the first time unit includes a first time slot or a first subframe.

Optionally, before the step S201, the correspondence between the time unit that sends the downlink signal of the first carrier to the terminal device and the time unit of the second carrier that sends the feedback information of the downlink signal of the first carrier is determined to be the second. a time unit, wherein the correspondence is determined according to an uplink and downlink transmission direction configuration of the first carrier. The terminal device determines, according to the correspondence, a second time unit used for transmitting the first feedback information of the first downlink signal on the second carrier.

Optionally, the period of the uplink and downlink transmission direction of the first carrier is 2.5 milliseconds, and the period of the uplink and downlink transmission direction includes 5 time slots, and the third time slot of the uplink and downlink transmission direction is uplink. Gap, the remaining time slots are downlink time slots. Correspondingly, the correspondence is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the second carrier transmitting the feedback information of the downlink signal of the first carrier. The subframe number of the time unit, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0, 1) , (1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4,9),( 9,5,11),(10,5,11),(11,6,13),(13,7,15),(14,7,15),(15,8,17),(16, 8,17), at least one of (18,9,19), (19,0,1).

Optionally, the period of the uplink and downlink transmission direction configuration of the first carrier is 5 milliseconds, and the period configured in the uplink and downlink transmission direction includes 10 time slots, and the fifth time slot and the sixth time in the period configured by the uplink and downlink transmission directions are configured. The time slots are uplink time slots, and the remaining time slots are downlink time slots. Correspondingly, the correspondence is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the second carrier transmitting the feedback information of the downlink signal of the first carrier. The subframe number of the time unit, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0, 1) , (1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4,9),( 9,5,11),(10,5,11),(11,6,13),(12,6,13),(13,7,15),(16,8,17),(17, 9,19), at least one of (18,9,19), (19,0,1).

Alternatively, the terminal device may pre-configure a plurality of corresponding relationships. Before the step S201, the network-side device notifies the terminal device by signaling, which one of the plurality of corresponding relationships is used.

Alternatively, before the step S201, the network device sends the indication information of the second time unit to the terminal device, and the terminal device determines the second time unit according to the indication information.

Optionally, the first carrier is a carrier used by the first radio access technology, the second carrier is a carrier used by the second radio access technology, and the terminal device passes the first radio access technology and the second radio interface. Into the technology for DC communication. Optionally, the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology. The first radio access technology may be an NR access technology, and the second access technology may be an LTE access technology.

Step S202: The network device receives first feedback information of the first downlink signal sent by the terminal device on the penultimate and/or last symbol of the second time unit of the second carrier.

In this embodiment, the network device sends the first downlink signal to the terminal device on the first time unit of the first carrier, where the first carrier is a TDD carrier, and the first time unit includes a first time slot or a first subframe, and Receiving first feedback information of the first downlink signal sent by the terminal device on the second and/or last symbol of the second time unit of the second carrier. The terminal device transmits the feedback information of the downlink signal on the first carrier on the second carrier, so that the requirement for the terminal device to send the uplink signal on the first carrier is reduced, thereby improving data transmission efficiency. When the method of the present invention is applied to a scenario in which the terminal device performs DC communication with the NR system and the LTE system, the LTE can be greatly reduced by reducing the situation in which the terminal device simultaneously transmits uplink signals on the first carrier and the second carrier. Loss of performance of the system.

FIG. 12 is a schematic structural diagram of a terminal device according to Embodiment 3. As shown in FIG. 12, the terminal device provided in this embodiment includes: a receiving module 11, a determining module 12, and a sending module 13.

The receiving module 11 is configured to receive, by using a network device, a first downlink signal on a first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or First subframe;

a determining unit 12, configured to determine a second time unit for transmitting first feedback information of the first downlink signal on a second carrier, where the second carrier is an uplink carrier of a frequency division duplex FDD, The second time unit includes a second time slot or a second subframe;

The sending module 13 is configured to send the first feedback information to the network device on a penultimate and/or last symbol of the second time unit of the second carrier.

Optionally, the determining module 12 is specifically configured to: respond to a time unit according to a time unit that receives the downlink signal of the first carrier, and a time unit of a second carrier that sends feedback information of the downlink signal of the first carrier. The relationship determines the second time unit, wherein the corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.

Optionally, the period of the uplink and downlink transmission direction of the first carrier is configured to be 2.5 milliseconds, the period of the uplink and downlink transmission direction is configured to include five time slots, and the third of the uplink and downlink transmission directions is configured. The time slots are uplink time slots, and the remaining time slots are downlink time slots. Correspondingly, the corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback of the downlink signal of the first carrier. The subframe number of the time unit of the second carrier of the information, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the values of (X, Y, Z) include (0,0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8 ,4,9),(9,5,11),(10,5,11),(11,6,13),(13,7,15),(14,7,15),(15,8 , 17), at least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).

Optionally, the period of the TDD configuration of the first carrier is 5 milliseconds, the period of the TDD configuration includes 10 time slots, and the fifth time slot and the sixth time slot in the period of the TDD configuration. For the uplink time slot, the remaining time slots are the downlink time slots. Correspondingly, the corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback of the downlink signal of the first carrier. The subframe number of the time unit of the second carrier of the information, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the values of (X, Y, Z) include (0,0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8 ,4,9),(9,5,11),(10,5,11),(11,6,13),(12,6,13),(13,7,15),(16,8 , 17), at least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).

Optionally, the determining module 12 is further configured to: when the second time unit overlaps with the first uplink time slot on the first carrier, determining that the second time slot is not behind the first uplink time slot. The signal is transmitted on m symbols, where m has a value of 1 or 2.

Optionally, the determining module 12 is further configured to: when the previous time slot adjacent to the first uplink time slot is a first downlink time slot, determine that the first downlink is not Receiving a signal on the last m symbols of the slot, or determining not to transmit a signal on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, the first downlink time slot The last m symbols or the first m symbols of the first uplink time slot are guard intervals GP.

Optionally, the sending module 13 is specifically configured to: send the first feedback information on a last symbol of the second time unit by using a subcarrier spacing of 15 KHz, or use a subcarrier spacing of 30 KHz in the The first feedback information is sent on the penultimate and/or last symbol of the second time unit.

The terminal device in this embodiment may be used to perform the method provided in the foregoing Embodiment 2. The specific implementation manner and the technical effects are similar, and details are not described herein again.

FIG. 13 is a schematic structural diagram of a network device according to Embodiment 4, as shown in FIG. 13, the network device provided in this embodiment includes:

The sending module 21 is configured to send, by using a first time unit of the first carrier, a first downlink signal, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or First subframe;

The receiving module 22 is configured to receive first feedback information of the first downlink signal that is sent by the terminal device on a second and/or last symbol of a second time unit of the second carrier.

Optionally, the sending module 21 is further configured to: send, to the terminal device, a time unit of receiving a downlink signal of the first carrier and a time of transmitting a second carrier of feedback information of a downlink signal of the first carrier The correspondence between the units determines the second time unit, wherein the corresponding relationship is determined according to a TDD configuration of the first carrier.

Optionally, the period of the TDD configuration of the first carrier is 2.5 milliseconds, the period of the TDD configuration includes 5 time slots, and the third time slot of the TDD configured period is an uplink time slot, and the rest The time slot is a downlink time slot;

Optionally, the period of the TDD configuration of the first carrier is 5 milliseconds, the period of the TDD configuration includes 10 time slots, and the fifth time slot and the sixth time slot in the period of the TDD configuration. For the uplink time slot, the remaining time slots are the downlink time slots;

The network device in this embodiment may be used to perform the method provided in the foregoing Embodiment 2. The specific implementation manner and technical effects are similar, and details are not described herein again.

FIG. 14 is a schematic structural diagram of a terminal device according to Embodiment 5, as shown in FIG. 14, the terminal device 300 provided in this embodiment includes: a processor 31, a memory 32, a receiver 33, and a transmitter 34. The receiver 33 and the transmitter 34 are connected and communicated with the processor 31 via a bus, the memory 32 is for storing computer execution instructions, and the processor 31 is configured to execute the computer to execute instructions to enable the terminal device The method of the first embodiment is performed, and the specific implementation manners and technical effects are similar to those in the following description.

15 is a schematic structural diagram of a network device according to Embodiment 5, as shown in FIG. 15, the terminal device 400 provided in this embodiment includes: a processor 41, a memory 42, a receiver 43, and a transmitter 44, and the memory 42, The receiver 43 and the transmitter 44 are connected and communicated to the processor 31 via a bus, the memory 42 is for storing computer execution instructions, and the processor 41 is configured to execute the computer to execute instructions to cause the network device The method of the foregoing embodiment 1 is performed by 400, and the specific implementation manners and technical effects are similar to those in FIG.

It can be understood that the processor used by the network device and the terminal device in the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array (FPGA). Or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.

The bus described in this application may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform the embodiments of the present application. Part of the steps of the method. The foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like. A variety of media that can store program code.

Claims

A signal transmitting and receiving method, comprising:

The terminal device receives a first downlink signal from the network device on a first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a first subframe ;

Determining, by the terminal device, a second time unit for transmitting first feedback information of the first downlink signal on a second carrier, where the second carrier is an uplink carrier of a frequency division duplex FDD, The second time unit includes a second time slot or a second subframe;

The terminal device sends the first feedback information to the network device on a penultimate and/or last symbol of the second time unit of the second carrier.
The method according to claim 1, wherein the terminal device determines a second time unit for transmitting feedback information of the downlink signal on the second carrier, comprising:

Determining, by the terminal device, the second time unit according to a correspondence between a time unit that receives the downlink signal of the first carrier and a time unit of the second carrier that sends feedback information of the downlink signal of the first carrier, The corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.
The method according to claim 2, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 2.5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 5 time slots, and the uplink and downlink The third time slot in the period in which the transmission direction is configured is an uplink time slot, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17) At least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).
The method according to claim 2, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 10 time slots, and the uplink and downlink The fifth time slot and the sixth time slot in the period in which the transmission direction is configured are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (12, 6, 13), (13, 7, 15), (16, 8, 17) At least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).
The method according to any one of claims 1 to 4, further comprising:

When the second time unit overlaps with the first uplink time slot on the first carrier in time, the terminal device determines not to send a signal on the last m symbols of the first uplink time slot, where The value of m is 1 or 2.
The method of claim 5, further comprising:

When the previous time slot adjacent to the first uplink time slot is a first downlink time slot, the terminal device determines not to receive signals on the last m symbols of the first downlink time slot. Or the terminal device determines that the signal is not sent on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, and the last m symbols of the first downlink time slot or The first m symbols of the first uplink time slot are guard intervals GP.
The method according to any one of claims 1 to 4, wherein said terminal device is said to said second and/or last symbol of said second time unit of said second carrier The sending, by the network device, the first feedback information includes:

Transmitting, by the terminal device, the first feedback information on a last symbol of the second time unit by using a subcarrier spacing of 15 KHz; or

The terminal device sends the first feedback information on a penultimate and/or last symbol of the second time unit by using a subcarrier spacing of 30 KHz.
The method according to any one of claims 1 to 7, wherein the first carrier is a carrier used by a first radio access technology, and the second carrier is a carrier used by a second radio access technology. The terminal device performs dual-connection DC communication by using the first radio access technology and the second radio access technology.
The method according to claim 8, wherein the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology.
A terminal device, comprising:

a receiving module, configured to receive, by using a network device, a first downlink signal on a first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a One subframe;

a determining module, configured to determine a second time unit for transmitting first feedback information of the first downlink signal on a second carrier, where the second carrier is an uplink carrier of a frequency division duplex FDD, where The second time unit includes a second time slot or a second subframe;

And a sending module, configured to send the first feedback information to the network device on a penultimate and/or last symbol of the second time unit of the second carrier.
The terminal device according to claim 10, wherein the determining module is specifically configured to:

Determining the second time unit according to a correspondence between a time unit of receiving a downlink signal of the first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier, where The correspondence is determined according to the uplink and downlink transmission direction configuration of the first carrier.
The terminal device according to claim 11, wherein the period of the uplink and downlink transmission direction configuration of the first carrier is 2.5 milliseconds, and the period of the uplink and downlink transmission direction configuration includes 5 time slots, the upper and lower The third time slot in the period in which the row transmission direction is configured is an uplink time slot, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17) At least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).
The terminal device according to claim 11, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 10 time slots, the upper and lower The fifth time slot and the sixth time slot in the period in which the row transmission direction is configured are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (12, 6, 13), (13, 7, 15), (16, 8, 17) At least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).
The terminal device according to any one of claims 10 to 13, wherein the determining module is further configured to:

When the second time unit overlaps with the first uplink time slot on the first carrier, determining that the signal is not transmitted on the last m symbols of the first uplink time slot, where the value of m is It is 1 or 2.
The terminal device according to claim 14, wherein the determining module is further configured to:

When the previous time slot adjacent to the first uplink time slot is the first downlink time slot, determining that the signal is not received on the last m symbols of the first downlink time slot, or determining Not transmitting a signal on the first m symbols of the first uplink time slot, where the value of m includes 1 or 2, the last m symbols of the first downlink time slot or the first uplink time slot The first m symbols are guard intervals GP.
The terminal device according to any one of claims 10 to 13, wherein the sending module is specifically configured to:

Transmitting the first feedback information on a last symbol of the second time unit by using a subcarrier spacing of 15 KHz; or

The first feedback information is transmitted on the penultimate and/or last symbol of the second time unit using a subcarrier spacing of 30 KHz.
The terminal device according to any one of claims 10 to 16, wherein the first carrier is a carrier used by a first radio access technology, and the second carrier is a carrier used by a second radio access technology. And the terminal device performs dual-connection DC communication by using the first radio access technology and the second radio access technology.
The terminal device according to claim 17, wherein the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology.
A signal transmitting and receiving method, comprising:

The network device sends a first downlink signal to the terminal device on the first time unit of the first carrier, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a first subframe ;

The network device receives first feedback information of the first downlink signal that is sent by the terminal device on a second and/or last symbol of a second time unit of the second carrier.
The method of claim 19, further comprising:

Corresponding relationship between the time unit of the network device transmitting the downlink signal of the first carrier and the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier to the terminal device a second time unit, wherein the corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.
The method according to claim 20, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 2.5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 5 time slots, and the uplink and downlink The third time slot in the period in which the transmission direction is configured is an uplink time slot, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17) At least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).
The method according to claim 20, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 10 time slots, and the uplink and downlink The fifth time slot and the sixth time slot in the period in which the transmission direction is configured are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (12, 6, 13), (13, 7, 15), (16, 8, 17) At least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).
The method according to any one of claims 19 to 22, wherein the first carrier is a carrier used by a first radio access technology, and the second carrier is a carrier used by a second radio access technology, The terminal device performs dual-connection DC communication by using the first radio access technology and the second radio access technology.
The method according to any one of claims 19 to 22, wherein the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology.
A network device, comprising:

a sending module, configured to send, by using a first time unit of the first carrier, a first downlink signal, where the first carrier is a time division duplex TDD carrier, and the first time unit includes a first time slot or a One subframe;

And a receiving module, configured to receive first feedback information of the first downlink signal that is sent by the terminal device on a second and/or last symbol of a second time unit of the second carrier.
The network device according to claim 25, wherein the sending module is further configured to:

Determining, by the terminal device, a correspondence between a time unit of receiving a downlink signal of the first carrier and a time unit of a second carrier transmitting feedback information of a downlink signal of the first carrier, determining the second time unit The corresponding relationship is determined according to an uplink and downlink transmission direction configuration of the first carrier.
The network device according to claim 26, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 2.5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes five time slots, the upper and lower The third time slot in the period in which the row transmission direction is configured is an uplink time slot, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(3,2,5),(4,2,5),(5,3,7),(6,3,7),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (13, 7, 15), (14, 7, 15), (15, 8, 17) At least one of (16, 8, 17), (18, 9, 19), (19, 0, 1).
The network device according to claim 26, wherein a period of the uplink and downlink transmission direction configuration of the first carrier is 5 milliseconds, and a period of the uplink and downlink transmission direction configuration includes 10 time slots, the upper and lower The fifth time slot and the sixth time slot in the period in which the row transmission direction is configured are uplink time slots, and the remaining time slots are downlink time slots;

The corresponding relationship is (X, Y, Z), where X is the slot number of the time unit of the downlink signal receiving the first carrier, and Y is the feedback information of the downlink signal for transmitting the first carrier. The subframe number of the time unit of the two carriers, Z is the slot number of the time unit of the second carrier transmitting the feedback information of the downlink signal of the first carrier, and the value of (X, Y, Z) includes (0, 0,1),(1,1,3),(2,1,3),(3,2,5),(6,3,7),(7,4,9),(8,4, 9), (9, 5, 11), (10, 5, 11), (11, 6, 13), (12, 6, 13), (13, 7, 15), (16, 8, 17) At least one of (17, 9, 19), (18, 9, 19), (19, 0, 1).
The network device according to any one of claims 25 to 28, wherein the first carrier is a carrier used by a first radio access technology, and the second carrier is a carrier used by a second radio access technology. And the terminal device performs dual-connection DC communication by using the first radio access technology and the second radio access technology.
The network device according to any one of claims 25 to 28, wherein the interval of the subcarriers used by the first radio access technology is greater than the subcarrier spacing used by the second radio access technology.