CN110798296B

CN110798296B - Downlink signal indication and receiving method and equipment

Info

Publication number: CN110798296B
Application number: CN201810879114.6A
Authority: CN
Inventors: 鲁智; 孙鹏; 孙晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-08-03
Filing date: 2018-08-03
Publication date: 2021-11-09
Anticipated expiration: 2038-08-03
Also published as: CN110798296A

Abstract

The invention provides a downlink signal indicating and receiving method and equipment, wherein the indicating method comprises the following steps: and sending first indication information, wherein the first indication information is used for determining whether the multiple Physical Downlink Shared Channels (PDSCHs) received according to the multiple quasi-co-location QCL parameters belong to the same PDSCH by the terminal equipment. According to the embodiment of the invention, the network equipment sends the first indication information which is used for determining whether the multiple PDSCHs received according to the multiple QCL parameters belong to the same PDSCH or not to the terminal equipment, so that the terminal equipment can determine whether the received PDSCH data belong to the same PDSCH or not, and the reliability and effectiveness of data transmission can be further improved.

Description

Downlink signal indication and receiving method and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a downlink signal indication and receiving method and device.

Background

Fifth generation (5)^thGeneration, 5G) application scenarios of Mobile Communication systems include enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and high-reliability and low-latency Communication (Ultra Reliable)&Low Latency Communication, URLLC), etc., which put forward requirements on the system for high reliability, Low Latency, high throughput, large bandwidth, wide coverage, etc. Since the reliability and throughput of data Transmission can be increased by multi-Transmission and Reception Point (TRP) Transmission, signal Transmission based on multi-TRP becomes one of important technologies of a 5G system. For example, the network side may send the same or different data to a terminal Equipment (UE) through a plurality of TRPs.

However, at present, the UE transparently receives data from multiple TRPs like receiving data from a single TRP, and the UE cannot confirm whether the data from multiple TRPs is the same data, resulting in low efficiency of data transmission.

Disclosure of Invention

The embodiment of the invention provides a downlink signal indicating and receiving method and equipment, which are used for improving the effectiveness of data transmission based on multiple sending and receiving points.

In a first aspect, a downlink signal indication method is provided, and is applied to a network device, where the method includes:

and sending first indication information, wherein the first indication information is used for determining whether the multiple Physical Downlink Shared Channels (PDSCHs) received according to the multiple quasi-co-location QCL parameters belong to the same PDSCH by the terminal equipment.

In a second aspect, a downlink signal receiving method is provided, and is applied to a terminal device, where the method includes:

receiving first indication information, wherein the first indication information is used for a terminal device to determine whether a plurality of physical downlink shared channel PDSCHs received according to a plurality of quasi-co-location QCL parameters belong to the same PDSCH.

In a third aspect, a network device is provided, which includes:

a first sending module, configured to send first indication information, where the first indication information is used for a terminal device to determine whether multiple PDSCHs of a physical downlink shared channel received according to multiple quasi-co-located QCL parameters belong to a same PDSCH.

In a fourth aspect, a terminal device is provided, which includes:

a first receiving module, configured to receive first indication information, where the first indication information is used for a terminal device to determine whether multiple PDSCHs of a physical downlink shared channel received according to multiple quasi-co-located QCL parameters belong to a same PDSCH.

In a fifth aspect, a network device is provided, which comprises a memory, a processor and a wireless communication program stored on the memory and executable on the processor, the wireless communication program, when executed by the processor, implementing the steps of the method according to the first aspect.

In a sixth aspect, a terminal device is provided, which comprises a memory, a processor and a wireless communication program stored on the memory and executable on the processor, the wireless communication program, when executed by the processor, implementing the steps of the method according to the second aspect.

In a seventh aspect, a computer readable medium is provided, having stored thereon a wireless communication program, which when executed by a processor, performs the steps of the method according to the first or second aspect.

In the embodiment of the present invention, because the network device sends the first indication information, which is used for the terminal device to determine whether multiple PDSCHs received according to multiple QCL parameters belong to the same PDSCH, the terminal device can determine whether PDSCH data from multiple TRPs (where the QCL parameters and the TRPs have a corresponding relationship) belong to the same PDSCH, and thus reliability and effectiveness of data transmission can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is one of schematic diagrams of an application scenario according to an embodiment of the present invention.

Fig. 2 is a second schematic view of an application scenario according to an embodiment of the present invention.

Fig. 3 is a schematic flow chart of a downlink signal indication method according to an embodiment of the present invention.

Fig. 4 is a schematic flowchart of a downlink signal receiving method according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a network device 500 according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a terminal device 600 according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a network device 700 according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS) or a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New Radio (NR) System.

A Terminal device (UE), which may also be referred to as a Mobile Terminal (Mobile Terminal), a Mobile Terminal device, or the like, may communicate with at least one core Network via a Radio Access Network (RAN, for example), where the Terminal device may be a Mobile Terminal, such as a Mobile phone (or a "cellular" phone) and a computer having the Mobile Terminal, such as a portable, pocket, handheld, computer-embedded or vehicle-mounted Mobile device, and may exchange languages and/or data with the Radio Access Network.

The network device is a device deployed in a radio access network device and configured to provide a downlink signal indication function for a terminal device, where the network device may be a Base Station, and the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) and a 5G Base Station (gNB) in LTE, and a network-side device in a subsequent evolved communication system, where terms do not limit the protection scope of the present invention.

It should be noted that, when describing a specific embodiment, the sequence number of each process does not mean the execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiment of the present invention.

It should be noted that, the downlink signal indicating and receiving method and apparatus provided in the embodiment of the present invention are described below by taking the 5G system as an example, and it should be understood that the downlink signal indicating and receiving method and apparatus provided in the embodiment of the present invention may also be applied to other communication systems, and are not limited to the 5G system.

In order to more clearly understand the technical solutions provided by the embodiments of the present invention, an application scenario of the embodiments of the present invention is described below with reference to fig. 1 and fig. 2.

The technical solution provided in the embodiments of the present invention is directed to an application scenario in which a plurality of Downlink Control Information (DCI) schedules a plurality of Physical Downlink Shared Channels (PDSCH) and other Physical Shared channels simultaneously. It should be understood that the DCI is typically carried by a Physical Downlink Control Channel (PDCCH).

And in the embodiment of the invention, "simultaneously" is not strictly synchronized in time, but includes the following two meanings: the terminal device monitors the same monitoring time (monitoring duration) of the DCI, or the time interval is shorter than the preset time interval. The preset time interval is defined as follows.

As shown in fig. 1, in an application scenario, a Transmission and Reception Point (TRP) 1 transmits information to a terminal device 3 in a beam direction 11, where the information is carried by a PDCCH1 (DCI for invoking PDSCH1 is carried in PDCCH 1) and a PDSCH 1; at the same time, TRP2 transmits information to terminal device 3 in beam direction 21, which information passes through PDCCH2(PDCCH2 carries DCI for calling PDSCH 1) and PDSCH 1. That is, in the scenario shown in fig. 1, two TRPs simultaneously transmit two different PDCCHs to the terminal device, but the two different PDCCHs invoke the same PDSCH.

As shown in fig. 2, in another application scenario, the TRP1 transmits information to the terminal device 3 in the beam direction 11, where the information is carried by PDCCH1 (DCI for calling PDSCH1 is carried in PDCCH 1) and PDSCH 1; at the same time, TRP2 transmits to terminal device 3, in beam direction 21, information carried by PDCCH2 (DCI for calling PDSCH2 is carried in PDCCH 2) and PDSCH 2. That is, in the scenario shown in fig. 2, two TRPs simultaneously transmit two different PDCCHs to the terminal device, and the two different PDCCHs respectively invoke different PDSCHs.

In fig. 1 and 2, TRP1 and TRP2 may be the same network device or different network devices. The technical scheme provided by the embodiment of the invention can be considered as aiming at the application scene that a plurality of TRPs simultaneously transmit the PDSCH to the terminal equipment. And the PDSCHs transmitted by the plurality of TRPs to the terminal equipment can be the same PDSCH or different PDSCHs. The purpose of the embodiments of the present invention is to enable a terminal device to confirm whether PDSCHs from multiple TRPs belong to the same PDSCH at the same time, instead of transparently receiving PDSCHs from multiple TRPs, and finally improve reliability and effectiveness of data transmission.

The following describes a downlink signal indication method applied to a network device with reference to fig. 3.

Fig. 3 shows a downlink signal indication method according to an embodiment of the present invention, which is applied to a network device. As shown in fig. 3, the method may include the steps of:

step 301, sending first indication information, where the first indication information is used for a terminal device to determine whether multiple physical downlink shared channels PDSCH received according to multiple quasi-co-located QCL parameters belong to the same PDSCH.

Wherein a Quasi Co-location (QCL) is used to associate at least two antenna ports. When there is a QCL relationship between the two antennas, it means that certain large-scale parameters of the at least two antenna ports to the same terminal device are similar or identical, for example at least one of the parameters doppler shift, doppler spread, average delay, delay spread and spatial reception parameters are similar or identical.

On the basis, one QCL parameter can be understood as a set of the above-mentioned large-scale parameters. Generally, one QCL parameter corresponds to one network device (or TRP), and accordingly, in step 301, the multiple PDSCHs received according to the multiple QCL parameters can be understood as multiple PDSCHs received from multiple TRPs.

Optionally, in this embodiment of the present invention, the plurality of QCL parameters in step 301 may be the same plurality of QCL parameters, or may be different plurality of QCL parameters. Whether the two QCL parameters are the same or not can be determined by judging whether the large-scale parameters corresponding to the two QCL parameters are the same or not.

Alternatively, one QCL parameter may be considered to correspond to one control resource set (coreset), and one control resource set corresponds to one TRP. The control resource set generally refers to a resource set (mainly frequency domain resources) carrying PDCCHs, multiple PDCCHs may be configured using parameters of one control resource set, and one PDCCH may carry one DCI.

As an example, whether multiple PDSCHs belong to the same PDSCH may be understood as whether the multiple PDSCHs are scheduled by the same Hybrid Automatic Repeat Request (HARQ) process, if the multiple PDSCHs are scheduled by the same HARQ process, the multiple PDSCHs may be considered as belonging to the same PDSCH, otherwise, the multiple PDSCHs do not belong to the same PDSCH.

Further, when the terminal device determines that the multiple PDSCHs are scheduled by the same HARQ process, the received multiple PDSCHs may be stored in a buffer corresponding to the identifier of the HARQ process; when the terminal equipment determines that the multiple PDSCHs are scheduled by different HARQ processes, the multiple PDSCHs are respectively stored in the cache corresponding to the identifier of the corresponding HARQ process, so that the terminal equipment can conveniently process the PDSCHs, and the reliability and the effectiveness of PDSCH transmission are improved.

In a more specific example, the first indication information in step 301 is transmitted through DCI, where the first indication information may include a New Data Indicator (NDI) field value and an identifier of a HARQ process scheduling the PDSCH, and the DCI is a DCI scheduling the PDSCH within the same monitoring time.

In this example, when HARQ processes scheduling the multiple PDSCHs in the same monitoring time have the same identifier and NDI field values in DCI scheduling the multiple PDSCHs in the same monitoring time are the same, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH. Optionally, when the identities of HARQ processes scheduling the multiple PDSCHs simultaneously are different, the terminal device may determine that the multiple PDSCHs belong to different PDSCHs. Wherein, the identification of the HARQ process can be represented by the ID of the HARQ process.

It can be understood that when the IDs of HARQ processes in a plurality of DCIs (a plurality of DCIs used for scheduling a plurality of PDSCHs) transmitted by the network device to the terminal device within the same monitoring time are the same, it indicates that the plurality of PDSCHs scheduled by the plurality of DCIs are for the same HARQ process; further, when the NDI field values in the plurality of DCIs are also the same, the data types (data types including new data or retransmission data) of the plurality of PDSCHs scheduled by the plurality of DCIs are also the same. At this time, the terminal device may determine that the multiple PDSCHs scheduled by the multiple DCI belong to the same PDSCH.

In another more specific example, before step 301, the method shown in fig. 3 may further include: and sending second indication information through high-level information, wherein the second indication information comprises a preset time interval. The higher layer information may be, for example, Radio Resource Control (RRC) information, or MAC layer signaling. And the first indication information is transmitted through downlink control information DCI of the scheduled PDSCH, and the first indication information comprises a New Data Indication (NDI) domain value and an identifier of a hybrid automatic repeat request (HARQ) process of the scheduled PDSCH.

In this example, when the time interval in which the terminal device receives the DCI scheduling the multiple PDSCHs is within the preset time interval, the HARQ processes scheduling the multiple PDSCHs have the same identifier, and the NDI field values in the DCI scheduling the multiple PDSCHs are the same, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH. On the contrary, when the time interval in which the terminal device receives the DCI scheduling the PDSCHs is not within the preset time interval, the terminal device does not schedule the PDSCHs belonging to the same PDSCH. The preset time interval can be determined according to the time delay of transmitting data to the terminal device by different TRPs.

It is understood that, in practical applications, the network side tends to schedule multiple TRPs at the same monitoring time to transmit the same data to the terminal device, so the terminal device may determine whether multiple received PDSCHs belong to the same PDSCH according to the time of receiving DCI scheduling multiple PDSCHs. However, since interaction between different TRPs requires time, time delays for transmitting data to the terminal device may be different, and therefore, even if a plurality of TRPs transmit a plurality of DCIs scheduling the same PDSCH to the terminal device, the time when the terminal device receives the plurality of DCIs is not within the same monitoring time, but exceeds the same monitoring time, but the exceeding range is not too large, and therefore, the terminal device may determine whether the plurality of PDSCHs scheduled by the plurality of DCI belong to the same PDSCH according to whether the time interval for receiving the plurality of DCI is within the preset time interval.

Optionally, in this example, the redundancy versions of the multiple PDSCHs received according to the multiple QCL parameters may be the same; alternatively, the redundancy versions of the multiple PDSCHs received according to the multiple QCL parameters may be different.

As an example, when the terminal device determines that the multiple PDSCHs belong to the same PDSCH, Transport Blocks (TBs) carried in the multiple PDSCHs are the same. More specifically, the TBs carried in the multiple PDSCHs are the same, and the following two cases may be included.

In the first case, the layers of TBs carried in multiple PDSCHs are the same. For example, the terminal device receives layer 1-2 data of TB1 of a certain PDSCH according to one QCL parameter, and the terminal device receives layer 1-2 data of TB1 of the PDSCH according to another QCL parameter.

In a second case, the layers of TBs carried in the multiple PDSCHs are different. For example, the terminal device receives layer 1-2 data of TB1 of a certain PDSCH according to one QCL parameter, and the terminal device receives layer 3-4 data of TB1 of the PDSCH according to another QCL parameter. Or for example, the terminal device receives the 1-2 layer data of the TB1 of a certain PDSCH according to one QCL parameter, and the terminal device receives the 3-4 layer data of the TB1 of the PDSCH and the 1-2 layer data of the TB2 according to another QCL parameter.

It can be understood that one PDSCH can generally carry two TBs, which are commonly denoted by TB1 and TB2, and data in TB1 and TB2 can be divided into multiple layers according to the number of Demodulation Reference Signal (DMRS) ports of a network device. For example, assuming that the network device indicates to use 8 DMRS ports to transmit PDSCH, TB1 may be correspondingly divided into at most 1-4 layers and mapped to 4 of the 8 DMRS ports to transmit when TB1 is transmitted; TB2 is also divided into at most 1-4 layers and transmitted mapped to the other 4 of the 8 DMRS ports when TB2 is transmitted.

In this example, the TB and the mapping relationship between the layers in the TB and the DMRS port may be determined according to a preset rule. For example, if the DMRS ports used for transmitting PDSCH according to the first QCL parameter are 1 to 8 and the DMRS ports used for transmitting PDSCH according to the second QCL parameter are also 1 to 8, TB1 may be mapped to the first 4 ports of the 8 ports and TB2 may be mapped to the last 4 ports of the 8 ports, that is, if the DMRS port numbers of PDSCH received by the terminal device are indicated as 1 to 4, it is indicated that TB1 of the PDSCH is transmitted; if the terminal device receives the PDSCH with DMRS port number indication of 5-8, the terminal device transmits TB2 of the PDSCH.

On this basis, the terminal device may determine the TB in the received PDSCH and the layer in the TB according to the DMRS port number indicated by the network.

For another example, if the DMRS port used for transmitting PDSCH according to the first QCL parameter is 1 to 4, and the DMRS port used for transmitting PDSCH according to the second QCL parameter is also 1 to 4, the same layer in TB1 indicating the PDSCH is correspondingly transmitted by two QCL parameters; if the DMRS port used for transmitting the PDSCH according to the first QCL parameter is 1-4 and the DMRS port used for transmitting the PDSCH according to the second QCL parameter is 3-6, it means that the 1-2 layers in the TB1 of the PDSCH are transmitted by the first QCL parameter, the 3-4 layers in the TB1 of the PDSCH are transmitted by the first QCL parameter and the second QCL parameter, and the 1-2 layers in the TB2 of the PDSCH are transmitted by the second QCL parameter.

As another example, the multiple PDSCHs belong to the same PDSCH, and may be different TBs of the same PDSCH with respect to data in the multiple PDSCHs. For example, the terminal device receives TB1 of a certain PDSCH according to one QCL parameter, and the terminal device receives TB2 of the PDSCH according to another QCL parameter.

In the downlink signal indication method provided in the embodiment shown in fig. 3, the first indication information that is sent to the terminal device by the network device and used for the terminal device to determine whether multiple PDSCHs received according to multiple QCL parameters belong to the same PDSCH or not can enable the terminal device to determine whether PDSCH data from multiple TRPs belong to the same PDSCH or not, and thus reliability and effectiveness of data transmission can be improved.

Optionally, in another embodiment, the first indication information in step 301 may be transmitted through downlink Control information DCI for scheduling the PDSCH, and the first indication information may include first indication information of a Physical Uplink Control Channel (PUCCH) resource, where the first indication information of the PUCCH resource is used for the terminal device to determine a PUCCH resource for transmitting HARQ-ACK information corresponding to the PDSCH.

Wherein the PUCCH resources indicated in the DCI scheduling the multiple PDSCHs may be the same or the PUCCH resources indicated in the DCI scheduling the multiple PDSCHs may be different.

In this embodiment, since the terminal device is further configured with the PUCCH resource for transmitting the HARQ-ACK information corresponding to the PDSCH through the DCI, after the terminal device receives the multiple PDSCHs according to the multiple QCL parameters, the terminal device may feed back the HARQ-ACK information to the network device through the PUCCH resource indicated by the DCI, so that the communication effectiveness and reliability may be further improved.

Optionally, in another embodiment, when the NDI domain value indicated in the DCI employs an initial transmission flipping and retransmission non-flipping mechanism, and the network device transmits the PDSCH to the terminal device through multiple TRPs, if the multiple TRPs are not properly coordinated, the NDI domain in the multiple DCIs may be flipped, or even flipped to different values. If the scheduling DCI for the PDSCH corresponding to one QCL parameter is lost, the PDSCH corresponding to another QCL parameter may be considered a retransmission of the previous transmission and erroneously incorporated into the historical data received by the terminal device. To avoid this problem, as another example of step 301, the first indication information may include a target indication threshold and an identifier of a HARQ process scheduling the PDSCH, and the HARQ process scheduling the PDSCH is a HARQ process that has received ACK information.

In this way, when the target indicator field values in the DCI scheduling the multiple PDSCHs are preset values and HARQ processes scheduling the multiple PDSCHs have the same identifier, the terminal device determines that the multiple PDSCHs belong to the same PDSCH. Optionally, when the identities of HARQ processes scheduling the multiple PDSCHs are different; the terminal device may determine that the multiple PDSCHs belong to different PDSCHs.

For example, 1 bit may be added to the DCI to indicate a target indication domain value, and when the target indication domain value is 0 (the preset value mentioned above), it is considered that multiple PDSCHs are scheduled by multiple DCIs, and when the target indication domain value is 1, it is considered that only one DCI schedules a single PDSCH. Further, on the basis that multiple PDSCHs are scheduled by multiple DCIs, if HARQ processes for scheduling the multiple PDSCHs by the multiple DCIs have the same identifier, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH.

In addition, when the network side transmits the HARQ processes with the same identification according to the plurality of QCL parameters, the HARQ process which receives the ACK information is used, and a retransmission HARQ process is not used; correspondingly, on the terminal equipment side, if ACK information is already fed back to an HARQ process for scheduling a PDSCH, when a plurality of PDSCHs indicating that the HARQ process is transmitted through a plurality of QCL parameters are received, the cache corresponding to the HARQ process is emptied, and when the plurality of PDSCHs corresponding to the HARQ process are received through the plurality of QCL parameters, the terminal equipment considers that new data are received and feeds back HARQ-ACK information according to the new data receiving condition. In this way, it is possible to avoid the phenomenon that "if scheduling DCI of PDSCH corresponding to one QCL parameter is lost, PDSCH corresponding to another QCL parameter may be erroneously incorporated into the history data received by the terminal device".

The above describes a downlink signal indication method provided in the embodiment of the present invention, and a downlink signal receiving method provided in the embodiment of the present invention is described below.

Fig. 4 shows a downlink signal receiving method according to an embodiment of the present invention, which is applied to a terminal device. As shown in fig. 4, the method may include the steps of:

step 401, receiving first indication information, where the first indication information is used by the terminal device to determine whether multiple PDSCHs of the physical downlink shared channel received according to multiple quasi-co-located QCL parameters belong to the same PDSCH.

Optionally, in this embodiment of the present invention, the plurality of QCL parameters in step 401 may be the same plurality of QCL parameters, or may be different plurality of QCL parameters.

In an example, the first indication information in step 401 is transmitted by scheduling DCI of a PDSCH within the same monitoring time, and the first indication information may include a New Data Indicator (NDI) field value and an identifier of a Hybrid Automatic Repeat Request (HARQ) process for scheduling the PDSCH.

In this example, when HARQ processes scheduling the multiple PDSCHs in the same monitoring time have the same identifier and NDI domain values in DCI scheduling the multiple PDSCHs are in the same monitoring time, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH. Optionally, when the identities of HARQ processes scheduling the multiple PDSCHs in the same monitoring time are different, the terminal device may determine that the multiple PDSCHs belong to different PDSCHs. Wherein, the identification of the HARQ process can be represented by the ID of the HARQ process.

In the embodiment of the present invention, the network device sends a plurality of DCIs to the terminal device, which may be understood as that the network device sends a plurality of DCIs to the terminal device at the same monitoring time of the terminal device.

In another example, before step 401, the method shown in fig. 4 may further include: before receiving the first indication information, receiving second indication information through high-layer information, wherein the second indication information comprises a preset time interval. The higher layer information may be, for example, Radio Resource Control (RRC) information, or MAC layer signaling. And the first indication information is transmitted through downlink control information DCI of the scheduled PDSCH, and the first indication information comprises a New Data Indication (NDI) domain value and an identifier of a hybrid automatic repeat request (HARQ) process of the scheduled PDSCH.

As an example, the PDSCHs belong to the same PDSCH, and data in the PDSCHs may be the same Transport Block (TB) in the same PDSCH. More specifically, the data in the multiple PDSCHs are the same TBs in the same PDSCH, which may include the following two cases.

In the first case, the data in multiple PDSCHs are the same layer data of the same TB in the same PDSCH.

In the second case, the data in multiple PDSCHs are different layers of data of the same TB in the same PDSCH.

As another example, the multiple PDSCHs belong to the same PDSCH, and may be different TBs of the same PDSCH with respect to data in the multiple PDSCHs.

In the downlink signal receiving method provided in the embodiment shown in fig. 4, because the terminal device receives the first indication information for determining whether the multiple PDSCHs received according to the multiple QCL parameters belong to the same PDSCH, the terminal device can determine whether the PDSCH data from the multiple TRPs belong to the same PDSCH, and thus the validity and reliability of data transmission can be improved.

Optionally, in another embodiment, the first indication information in step 401 may be transmitted through downlink Control information DCI for scheduling the PDSCH, and the first indication information may include first indication information of a Physical Uplink Control Channel (PUCCH) resource, where the first indication information of the PUCCH resource is used for the terminal device to determine a PUCCH resource for transmitting HARQ-ACK information corresponding to the PDSCH.

In this embodiment, since the terminal device is further configured with the PUCCH resource for transmitting the HARQ-ACK information corresponding to the PDSCH through the DCI, after the terminal device receives the multiple PDSCHs according to the multiple QCL parameters, the terminal device may feed back the HARQ-ACK information to the network device through the PUCCH resource indicated by the DCI, so that the communication reliability and effectiveness may be further improved.

Since the downlink signal receiving method provided by the embodiment of the present invention corresponds to the downlink signal indication method provided by the embodiment of the present invention, the description of the downlink signal receiving method in the present specification is simpler, and for relevant parts, refer to the description of the downlink signal indication method in the foregoing.

The network device and the terminal device according to the embodiments of the present invention will be described in detail below with reference to fig. 5 to 6.

Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 5, the network device 500 includes: a first transmitting module 501.

A first sending module 501, configured to send first indication information, where the first indication information is used for a terminal device to determine whether multiple PDSCHs received according to multiple quasi-co-located QCL parameters belong to a same PDSCH.

Optionally, in this embodiment of the present invention, the plurality of QCL parameters in the first sending module 501 may be the same plurality of QCL parameters, or may be different plurality of QCL parameters.

In an example, the first indication information in the first sending module 501 is transmitted through DCI, and the first indication information may include a New Data Indicator (NDI) field value and an identifier of a Hybrid Automatic Repeat Request (HARQ) process for scheduling a PDSCH, where the DCI is DCI for scheduling a PDSCH within the same monitored time.

In this example, when HARQ processes scheduling the multiple PDSCHs in the same monitoring time have the same identifier and NDI domain values in DCI scheduling the multiple PDSCHs in the same monitoring time are in the same monitoring time, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH. Optionally, the terminal device may determine that the multiple PDSCHs belong to different PDSCHs when the identities of HARQ processes scheduling the multiple PDSCHs in the same monitoring time are not in the same monitoring time. Wherein, the identification of the HARQ process can be represented by the ID of the HARQ process.

In another example, the network device 500 shown in fig. 5 may further include: and the second sending module is used for sending second indication information through high-level information before sending the first indication information, wherein the second indication information comprises a preset time interval. The higher layer information may be, for example, Radio Resource Control (RRC) information, or MAC layer signaling. At this time, in the first sending module 501, the first indication information is transmitted through downlink control information DCI of the scheduled PDSCH, where the first indication information includes a new data indication NDI field value and an identifier of an HARQ process of the scheduled PDSCH.

As an example, when the terminal device determines that the multiple PDSCHs belong to the same PDSCH, the transport blocks, TBs, carried in the multiple PDSCHs are the same. More specifically, the transport blocks TB carried in multiple PDSCHs are the same, which may include the following two cases.

In the first case, the layers of TBs carried in the multiple PDSCHs are the same.

In a second case, the layers of TBs carried in the multiple PDSCHs are different.

As another example, when the terminal device determines that the multiple PDSCHs belong to the same PDSCH, the transport blocks, TBs, carried in the multiple PDSCHs are different. For example, the terminal device receives TB1 of a certain PDSCH according to one QCL parameter, and the terminal device receives TB2 of the PDSCH according to another QCL parameter.

In the network device 500 provided in the embodiment shown in fig. 5, because the first indication information is sent to the terminal device and used for the terminal device to determine whether multiple PDSCHs received according to multiple QCL parameters belong to the same PDSCH, the terminal device can be enabled to determine whether PDSCH data from multiple TRPs belong to the same PDSCH, and thus reliability and effectiveness of data transmission can be improved.

Optionally, in another embodiment, the first indication information in the first sending module 501 may be transmitted through downlink Control information DCI for scheduling the PDSCH, and the first indication information may include first indication information of a Physical Uplink Control Channel (PUCCH) resource, where the first indication information of the PUCCH resource is used for the terminal device to determine a PUCCH resource for transmitting HARQ-ACK information corresponding to the PDSCH.

In this embodiment, since the network device 500 further configures, through the DCI, the PUCCH resource for transmitting the HARQ-ACK information corresponding to the PDSCH to the terminal device, so that the terminal device can feed back the HARQ-ACK information to the network device through the PUCCH resource indicated by the DCI after receiving the multiple PDSCHs according to the multiple QCL parameters, thereby further improving communication reliability and effectiveness.

Optionally, in another embodiment, when the NDI field value indicated in the DCI employs an initial transmission flipping and retransmission non-flipping mechanism, and the network device sends the PDSCH to the terminal device through multiple TRPs. If multiple TRPs are not properly coordinated, it may cause the NDI field in multiple DCIs to flip, even to different values. If scheduling DCI for a PDSCH corresponding to one QCL parameter is lost, a PDSCH corresponding to another QCL parameter may be erroneously incorporated into the historical data received by the terminal device. To avoid this problem, as another example of the first sending module 501, the first indication information may include a target indication domain value and an identifier of a HARQ process scheduling the PDSCH, and the HARQ process scheduling the PDSCH is a HARQ process that has received HARQ-ACK information.

In this way, when the target indicator field values in the DCI scheduling the multiple PDSCHs are preset values and HARQ processes scheduling the multiple PDSCHs have the same identifier, the terminal device determines that the multiple PDSCHs belong to the same PDSCH.

When the network device 500 schedules HARQ processes having the same identifier according to multiple QCL parameters, the HARQ process that has received HARQ-ACK information is used instead of a HARQ process that is being retransmitted, so that a phenomenon that if scheduling DCI of a PDSCH corresponding to one QCL parameter is lost, a PDSCH corresponding to another QCL parameter is erroneously merged into historical data received by the terminal device can be avoided.

The network device 500 shown in fig. 5 may be used to implement the embodiments of the downlink signaling method shown in fig. 3, and please refer to the above method embodiments for related matters

Fig. 6 shows a schematic structural diagram of a terminal device according to an embodiment of the present invention, and as shown in fig. 6, the terminal device 600 includes: a first receiving module 601.

A first receiving module 601, configured to receive first indication information, where the first indication information is used for the terminal device to determine whether multiple PDSCHs received according to multiple quasi-co-located QCL parameters belong to a same PDSCH.

Optionally, in this embodiment of the present invention, the plurality of QCL parameters in the first receiving module 601 may be the same plurality of QCL parameters, or may be different plurality of QCL parameters.

In an example, the first indication information in the first receiving module 601 is transmitted by scheduling DCI of a PDSCH within the same monitoring time, and the first indication information may include a New Data Indicator (NDI) field value and an identifier of a Hybrid Automatic Repeat Request (HARQ) process for scheduling the PDSCH.

In this example, when HARQ processes scheduling the multiple PDSCHs in the same monitoring time have the same identifier and NDI field values in DCI scheduling the multiple PDSCHs are the same, the terminal device may determine that the multiple PDSCHs belong to the same PDSCH. Optionally, when the identities of HARQ processes scheduling the multiple PDSCHs in the same monitoring time are different, the terminal device may determine that the multiple PDSCHs belong to different PDSCHs. Wherein, the identification of the HARQ process can be represented by the ID of the HARQ process.

In another example, the terminal device 600 shown in fig. 6 may further include: and the second receiving module is used for receiving second indication information through high-level information before receiving the first indication information, wherein the second indication information comprises a preset time interval. The higher layer information may be, for example, Radio Resource Control (RRC) information, or MAC layer signaling. At this time, in the first receiving module 601, the first indication information is transmitted through downlink control information DCI of the scheduled PDSCH, and the first indication information includes a new data indication NDI domain value and an identifier of an HARQ process of the scheduled PDSCH.

In the terminal device 600 provided in the embodiment shown in fig. 6, because the first indication information is received for determining whether multiple PDSCHs received according to multiple QCL parameters belong to the same PDSCH, the terminal device can determine whether PDSCH data from multiple TRPs belong to the same PDSCH, and thus reliability and effectiveness of data transmission can be improved.

Optionally, in another embodiment, the first indication information in the first receiving module 601 may be transmitted through downlink Control information DCI for scheduling the PDSCH, and the first indication information may include first indication information of a Physical Uplink Control Channel (PUCCH) resource, where the first indication information of the PUCCH resource is used for the terminal device to determine a PUCCH resource for transmitting HARQ-ACK information corresponding to the PDSCH.

The terminal device 600 shown in fig. 6 may be used to implement various embodiments of the downlink signal receiving method shown in fig. 4, and please refer to the above method embodiments for relevant points.

Referring to fig. 7, fig. 7 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement the details of the downlink signal indication method and achieve the same effect. As shown in fig. 7, the network device 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704 and a bus interface, wherein:

in this embodiment of the present invention, the network device 700 further includes: a computer program stored in the memory 703 and capable of running on the processor 701, where the computer program is executed by the processor 701 to implement the processes of the downlink signal indication method, and can achieve the same technical effects, and is not described herein again to avoid repetition.

In fig. 7, the bus architecture may include any number of interconnected buses and bridges, with at least one processor, represented by processor 701, and various circuits, represented by memory 703, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with a desired device for different end devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

Fig. 8 is a schematic structural diagram of a terminal device according to another embodiment of the present invention. The terminal apparatus 800 shown in fig. 8 includes: at least one processor 801, memory 802, at least one network interface 804, and a user interface 803. The various components in the terminal device 800 are coupled together by a bus system 805. It is understood that the bus system 805 is used to enable communications among the components connected. The bus system 805 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 805 in fig. 8.

The user interface 803 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that the memory 802 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous SDRAM (ESDRAM), Sync Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 802 of the subject systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 802 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 8021 and application programs 8022.

The operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 8022 includes various applications, such as a media player (MediaPlayer), a Browser (Browser), and the like, for implementing various application services. A program implementing a method according to an embodiment of the present invention may be included in application program 8022.

In this embodiment of the present invention, the terminal device 800 further includes: a computer program stored in the memory 802 and capable of running on the processor 801, wherein the computer program, when executed by the processor 801, implements each process of the downlink signal receiving method described above, and can achieve the same technical effect, and for avoiding repetition, the details are not described here again.

The methods disclosed in the embodiments of the present invention described above may be implemented in the processor 801 or implemented by the processor 801. The processor 801 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The Processor 801 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and combines the hardware to complete the steps of the method. Specifically, the computer readable storage medium has stored thereon a computer program, which when executed by the processor 801 implements the steps of the downlink signal receiving method embodiment as described above.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing unit may be implemented in at least one Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a general purpose processor, a controller, a microcontroller, a microprocessor, other electronic units for performing the functions of the invention, or a combination thereof.

For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the downlink signal indication method or the downlink signal receiving method, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

An embodiment of the present invention further provides a computer program product including instructions, and when a computer runs the instructions of the computer program product, the computer executes the downlink signal indication method or the downlink signal receiving method. In particular, the computer program product may be run on the network device described above.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A downlink signal indication method is applied to a network device, and the method comprises the following steps:

sending first indication information, wherein the first indication information is used for a terminal device to determine whether a plurality of physical downlink shared channel PDSCHs received according to a plurality of quasi-co-location QCL parameters belong to the same PDSCH;

the plurality of PDSCHs received according to the plurality of quasi-co-located QCL parameters are a plurality of PDSCHs received from a plurality of transmission receiving points TRP.

2. The method of claim 1,

the first indication information is transmitted through Downlink Control Information (DCI), the first indication information comprises a New Data Indication (NDI) domain value and an identifier of a hybrid automatic repeat request (HARQ) process for scheduling the PDSCH, and the DCI is the DCI for scheduling the PDSCH in the same monitoring time;

and when the HARQ processes scheduling the PDSCHs in the same monitoring time have the same identifier and the NDI domain values in the DCI scheduling the PDSCHs in the same monitoring time are the same, the terminal equipment determines that the PDSCHs belong to the same PDSCH.

3. The method of claim 1, wherein prior to sending the first indication information, the method further comprises:

sending second indication information through high-level information, wherein the second indication information comprises a preset time interval;

the first indication information is transmitted through downlink control information DCI of a scheduling PDSCH, and the first indication information comprises a New Data Indication (NDI) domain value and an identifier of a hybrid automatic repeat request (HARQ) process of the scheduling PDSCH; when the time interval for the terminal equipment to receive the DCIs for scheduling the PDSCHs is within the preset time interval, the HARQ processes for scheduling the PDSCHs have the same identifier, and the NDI domain values in the DCIs for scheduling the PDSCHs are the same, the terminal equipment determines that the PDSCHs belong to the same PDSCH.

4. The method of claim 3,

the redundancy versions of the multiple PDSCHs are the same;

alternatively, the redundancy versions of the multiple PDSCHs are different.

5. The method according to any one of claims 1 to 4,

the plurality of QCL parameters are the same QCL parameters; or

The plurality of QCL parameters are different QCL parameters.

6. The method according to any one of claims 1 to 4,

when the terminal equipment determines that the multiple PDSCHs belong to the same PDSCH, the Transport Blocks (TBs) carried in the multiple PDSCHs are the same;

or when the terminal equipment determines that the multiple PDSCHs belong to the same PDSCH, the Transport Blocks (TBs) carried in the multiple PDSCHs are different.

7. The method of claim 6,

wherein, the transport blocks TB carried in the multiple PDSCHs are the same, including:

the layers of TBs carried in the multiple PDSCHs are the same;

or, the layers of TBs carried in the multiple PDSCHs are different.

8. The method of claim 1,

the first indication information is transmitted by scheduling Downlink Control Information (DCI) of the PDSCH, the first indication information comprises Physical Uplink Control Channel (PUCCH) resource indication information, and the PUCCH resource indication information is used for the terminal equipment to determine PUCCH resources for transmitting HARQ-ACK information corresponding to the PDSCH;

wherein the PUCCH resources indicated in the DCI for scheduling the multiple PDSCHs are the same, or the PUCCH resources indicated in the DCI for scheduling the multiple PDSCHs are different.

9. A downlink signal receiving method is applied to a terminal device, and the method comprises the following steps:

receiving first indication information, wherein the first indication information is used for the terminal equipment to determine whether a plurality of physical downlink shared channel PDSCHs received according to a plurality of quasi-co-location QCL parameters belong to the same PDSCH;

10. The method of claim 9,

11. The method of claim 9, wherein prior to receiving the first indication information, the method further comprises:

receiving second indication information through high-level information, wherein the second indication information comprises a preset time interval;

12. The method of claim 11,

the redundancy versions of the multiple PDSCHs are the same;

alternatively, the redundancy versions of the multiple PDSCHs are different.

13. The method according to any one of claims 9 to 12,

the plurality of QCL parameters are the same QCL parameters; or

The plurality of QCL parameters are different QCL parameters.

14. The method according to any one of claims 9 to 12,

15. The method of claim 14,

the layers of TBs carried in the multiple PDSCHs are the same;

or, the layers of TBs carried in the multiple PDSCHs are different.

16. The method of claim 9,

17. A network device, characterized in that the network device comprises:

a first sending module, configured to send first indication information, where the first indication information is used for a terminal device to determine whether multiple PDSCHs, which are received according to multiple quasi-co-located QCL parameters, belong to a same PDSCH;

18. A terminal device, characterized in that the terminal device comprises:

a first receiving module, configured to receive first indication information, where the first indication information is used by a terminal device to determine whether multiple PDSCHs, which are received according to multiple quasi-co-located QCL parameters, belong to a same PDSCH;

19. A network device comprising a memory, a processor, and a wireless communication program stored on the memory and executed on the processor, the wireless communication program when executed by the processor implementing the steps of the method of any one of claims 1-8.

20. A terminal device, characterized in that it comprises a memory, a processor and a wireless communication program stored on said memory and running on said processor, said wireless communication program, when executed by said processor, implementing the steps of the method according to any one of claims 9-16.

21. A computer readable medium having stored thereon a wireless communication program which, when executed by a processor, carries out the steps of the method according to any one of claims 1 to 16.