Method and apparatus for receiving downlink data channel, and method and apparatus for transmitting downlink data channel

Abstract

Embodiments of the present application provide a method and apparatus for transmitting a downlink data channel, and a method and apparatus for receiving a downlink data channel. The method for receiving the downlink data channel comprises: a terminal device receives first information from a network device, the first information being used for instructing the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; and the terminal device receives the PDSCH, wherein a second resource carrying the PDSCH in the first resource is determined on the basis of second information related to a CSI-RS resource.

Description

Method and device for receiving and sending downlink data channel Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] As a crucial component of new global infrastructure, 5G communication networks have experienced rapid development in recent years. As networks expand, operators' energy consumption continues to rise. For example, data released by China's Ministry of Industry and Information Technology indicates that energy consumption will increase by approximately 80% between 2015 and 2022.

[0003] With the development of 5G and the large-scale commercial use of 5G active antenna units (AAUs), energy consumption will increase exponentially compared to the remote radio units (RRUs) used primarily in 3G and 4G, due to the higher power consumption of AAUs. 5G defines three major service types: enhanced mobile broadband (eMBB), massive machine type of communication (mMTC), and ultra-reliable low-latency communication (URLLC). This will lead to an increase in bursty small packet traffic and 24 / 7 base station operation. The average daily energy consumption of 5G sites will be more than double that of 4G.

[0004] In the 5G era, 3GPP has introduced key technologies such as Massive MIMO and increased RF bandwidth. 5G supports higher data rates and greater data traffic, requiring more transmission bandwidth. High-frequency bands will be the primary frequency band for future 5G expansion. However, the transmission characteristics of high-frequency bands limit site coverage, leading to denser deployment of 5G sites. The increased energy consumption will also place significant pressure on operators' operating costs. Therefore, network energy conservation is crucial for reducing operating costs, and energy conservation in 5G networks is a pressing issue.

[0005] To achieve energy conservation, network devices can implement energy conservation in the time, frequency, spatial, and / or energy domains, depending on network load. For example, in the spatial and energy domains, network devices can power down some antennas when the load is low. In the time domain, network devices can implement cell-level discontinuous transmission / reception technology, which prevents network devices from transmitting and / or receiving signals during certain sleep periods.

[0006] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0007] Summary of the Invention

[0008] The inventors discovered that in the prior art, network devices typically do not dynamically adjust network antenna configurations. Instead, network devices configure Channel State Information Reference Signal (CSI-RS) resources through semi-static signaling, meaning that CSI-RS resources remain relatively unchanged over time. When mapping resources to the Physical Downlink Shared Channel (PDSCH), network devices avoid semi-statically configured CSI-RS resources, and terminal devices also avoid CSI-RS resources to ensure correct PDSCH reception.

[0009] However, in some wireless communication application scenarios (such as energy-saving mode), network equipment needs to dynamically adjust the antenna configuration used to serve terminal devices based on the real-time needs of network services, such as the number of antenna elements and antenna ports. Different antenna configurations may correspond to different CSI-RS resources, and CSI-RS resources may therefore change dynamically in network energy-saving scenarios. However, existing protocols do not clearly explain how to avoid CSI-RS for PDSCH resource mapping and how terminal devices can avoid CSI-RS to achieve correct PDSCH reception. Therefore, in network energy-saving scenarios, how to send and receive PDSCH and how to perform resource mapping when the antenna configuration changes become urgent issues that need to be addressed.

[0010] To address at least one of the above problems, an embodiment of the present application provides a method and apparatus for sending and receiving a downlink data channel.

[0011] According to one aspect of an embodiment of the present application, a method for receiving a downlink data channel is provided, including:

[0012] The terminal device receives first information from the network device, where the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; and

[0013] The terminal device receives the physical downlink shared channel; wherein the second resource carrying the PDSCH in the first resource is determined based on second information related to a channel state information reference signal (CSI-RS).

[0014] According to another aspect of an embodiment of the present application, a receiving device for a downlink data channel is provided, including:

[0015] A first receiving unit, configured to receive first information from a network device, where the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource;

[0016] A second receiving unit is configured to receive the physical downlink shared channel; wherein a second resource carrying the PDSCH in the first resource is determined according to second information related to the CSI-RS resource.

[0017] According to another aspect of an embodiment of the present application, a method for transmitting a downlink data channel is provided, including:

[0018] The network device sends first information to the terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource;

[0019] The network device sends the physical downlink shared channel to the terminal device; wherein, the second information related to the CSI-RS resource is used by the terminal device to determine the second resource that carries the PDSCH in the first resource.

[0020] According to another aspect of an embodiment of the present application, a downlink data channel transmitting device is provided, including:

[0021] A first sending unit, which sends first information to a terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource;

[0022] A second sending unit sends the physical downlink shared channel to the terminal device; wherein the second information related to the CSI-RS resource is used by the terminal device to determine the second resource carrying the PDSCH in the first resource.

[0023] According to another aspect of an embodiment of the present application, a communication system is provided, including:

[0024] A network device sends first information for instructing the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; and

[0025] A terminal device receives the physical downlink shared channel; wherein the second resource carrying the PDSCH in the first resource is determined based on the second information related to the CSI-RS resource.

[0026] One of the beneficial effects of the embodiments of the present application is that even in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can efficiently and accurately map resources to PDSCH and reach a consensus, and terminal equipment can accurately receive PDSCH, thereby improving the utilization of time-frequency resources and enhancing energy-saving gains.

[0027] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0028] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0029] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0031] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0032] FIG2 is a schematic diagram of a method for receiving a downlink data channel according to an embodiment of the present application;

[0033] FIG3 is a schematic diagram of space / energy domain element adjustment;

[0034] FIG4 is a schematic diagram of a method for transmitting a downlink data channel according to an embodiment of the present application;

[0035] FIG5 is a schematic diagram of a receiving device for a downlink data channel according to an embodiment of the present application;

[0036] FIG6 is a schematic diagram of a transmitting device for a downlink data channel according to an embodiment of the present application;

[0037] FIG7 is a schematic diagram of a network device according to an embodiment of the present application;

[0038] FIG8 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0040] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0041] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0042] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0043] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0044] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0045] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0046] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0047] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0048] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measuring, such as but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0049] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0050] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0051] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0052] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0053] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0054] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0055] In network energy-saving scenarios, such as when antenna configurations change, the issue of how to map PDSCH resources is pressing. In the following description, the terms "PDCCH" and "physical downlink control channel" or "downlink control information" are interchangeable, and the terms "PDSCH" and "physical downlink data channel" or "downlink data" are also interchangeable, to avoid confusion.

[0056] In addition, transmitting or receiving PDCCH can be understood as transmitting or receiving downlink control information carried by PDCCH; transmitting or receiving PDSCH can be understood as transmitting or receiving downlink data carried by PDSCH. In the embodiments of the present application, the terms "indication", "activation" and "trigger" can be used interchangeably, or any combination of the two or more.

[0057] Embodiments of the first aspect

[0058] The embodiment of the present application provides a method for receiving a downlink data channel, which is described from the perspective of a terminal device. FIG2 is a schematic diagram of the method for receiving a downlink data channel according to an embodiment of the present application. As shown in FIG2 , the method includes:

[0059] 201. A terminal device receives first information from a network device, where the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource.

[0060] 202. The terminal device receives the PDSCH; the terminal device determines a second resource in the first resource for carrying the PDSCH based at least on second information, where the second information is related to a channel state information reference signal (CSI-RS).

[0061] It is worth noting that FIG2 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG2 above.

[0062] In some embodiments, the first information may be a PDCCH and / or RRC signaling and / or MAC CE. The PDSCH may be a PDSCH scheduled or activated by a PDCCH, or may be a PDSCH configured / indicated by RRC signaling or MAC CE. The PDSCH may be a dynamic PDSCH or a semi-persistently scheduled (SPS) PDSCH. The PDCCH may be scrambled by a C-RNTI, MCSI-C-RNTI, or CS-RNTI, etc.

[0063] In some embodiments, the first resource is a time-frequency resource used to carry (or correspond to) the PDSCH. For example, the first resource can be represented by a physical resource block (PRB), or by a resource element (RE), and so on. For example, the first resource can include N PRBs and / or M REs, where N and M are natural numbers greater than or equal to 1. The second resource is a time-frequency resource used to carry the PDSCH in the first resource during resource mapping. For example, the second resource can be represented by a resource element (RE), which can be one or more resource elements (RE) that are not used for the channel state information reference signal (CSI-RS).

[0064] In some embodiments, the physical resource block (PRB) is a time-frequency resource unit used for a PDSCH scheduled by a PDCCH, the PDCCH being scrambled by a C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource block (PRB) is used for a PDSCH of semi-persistent scheduling (SPS).

[0065] In some embodiments, the second information is related to the CSI-RS resource and can be sent by the network device to the terminal device via semi-static signaling or dynamic signaling. The second information can include one or any combination of the following CSI-RS information: time domain information, frequency domain information, port information, and spatial domain information. The second information can also include one or any combination of the following information: resource set, sub-configuration, resource subset, resource, port, etc. The present application is not limited to this.

[0066] In some embodiments, the second information is used to configure and / or indicate a CSI-RS resource. The CSI-RS resource may be an NZP CSI-RS resource and / or a ZP CSI-RS resource. The present application is not limited thereto. For example, the second information may also configure and / or indicate a CSI-IM resource. The following description uses CSI-RS as an example. The second information includes at least CSI-RS configuration information, and / or CSI-RS indication / triggering / activation information, and / or CSI-RS predefined information and / or network indication information.

[0067] For example, the second information includes at least CSI-RS configuration information and is carried by RRC signaling. For example, the CSI-RS configuration information includes a CSI resource setting for channel measurement, and the CSI resource setting includes at least one CSI resource set. The CSI resource set is at least one NZP CSI-RS resource set and / or SSB (SS / PBCH block) set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

[0068] For another example, the second information includes at least CSI-RS configuration information and is carried by RRC signaling. For example, the CSI-RS configuration information includes one or more ZP CSI-RS resource sets, and the ZP CSI-RS resource set includes at most 16 ZP CSI-RS resources.

[0069] In some embodiments, the second information includes at least CSI-RS configuration information and is carried by RRC signaling. For example, the CSI-RS resource configuration information includes the NZP CSI-RS resource and / or ZP CSI-RS resource, and the NZP CSI-RS resource and / or ZP CSI-RS resource includes a resource mapping information element (Resource Mapping IE), which is used to determine the time-frequency resource and / or port information of the CSI-RS.

[0070] In some embodiments, the second information includes at least CSI-RS indication / trigger / activation information, which is carried by MAC CE and / or DCI. For example, the second information is CSI-RS indication / trigger / activation information, which can also be referred to as CSI-RS resource / port indication / trigger / activation information, or resource / port indication / trigger / activation information. The CSI-RS indication / trigger / activation information is used to indicate / trigger / activate at least one CSI-RS resource in a CSI resource set, and / or the CSI-RS indication / trigger / activation information is used to indicate / trigger / activate at least one CSI-RS port of a CSI-RS resource.

[0071] Taking the second information including the indication / triggering / activation information of the CSI-RS resource / port as an example:

[0072] For semi-persistent CSI-RS resources, the indication / triggering / activation information of the CSI-RS resources / ports is carried by, for example, a MAC CE. The MAC CE may be an existing semi-persistent CSI-RS activation / deactivation MAC CE, which is used for both CSI-RS resource activation / deactivation and indication / triggering / activation of CSI-RS resources / ports. In addition, the MAC CE may also be a newly defined MAC CE specifically used for indication / triggering / activation information of CSI-RS resources / ports.

[0073] For example, the two MAC CEs include at least multiple first fields, the first field width is one bit, and the first field represents a port or a CDM group, or represents a CSI-RS resource or a CSI-RS resource group. The first field is used to indicate / trigger / activate a port or a CDM group, or a CSI-RS resource (group), where setting it to 1 indicates that the corresponding port or resource is indicated / triggered / activated, and setting it to 0 indicates that the corresponding port resource is not indicated / triggered / activated. The MAC CE may also include at least one second field, the second field taking a value (such as 1 or 0) representing that the first field is used to indicate the CSI-RS port, and when the second field takes another value (such as 0 or 1), it represents that the first field is used to indicate the CSI-RS resource.

[0074] For aperiodic CSI-RS resources, the indication / triggering / activation information of the CSI-RS resources / ports is carried, for example, by DCI (e.g., CSI request field); the DCI (e.g., CSI request field) follows the existing signaling and is used for both aperiodic CSI reporting activation / deactivation and aperiodic CSI-RS resource activation / deactivation, as well as for indication / triggering / activation of aperiodic CSI reporting sub-configuration and indication / triggering / activation of aperiodic CSI-RS resources / ports. The aperiodic CSI-RS is associated with aperiodic CSI reporting, and the indicated / triggered / activated aperiodic CSI-RS resources / ports are the CSI-RS resource / port information included in the indicated / triggered / activated aperiodic CSI reporting sub-configuration.

[0075] In some embodiments, the first resource may include N PRBs, each PRB including K REs; K1 REs may carry the PDSCH, and K2 REs may be associated with the CSI-RS. The positions of the REs carrying the PDSCH in the PRB may be the same or different, or partially the same and partially different, in the N PRBs.

[0076] In addition, the REs carrying PDSCH determined for one PRB may be applied to N PRBs, or to some PRBs in the N PRBs. For example, the REs carrying PDSCH may be determined for each PRB (per PRB), but the present application is not limited thereto.

[0077] The above is a schematic description of the first information, the second information, the first resource, and the second resource, and the present application is not limited thereto. The following further describes resource mapping, or in other words, how to determine the second resource in the first resource for carrying the PDSCH.

[0078] In some embodiments, the terminal device determines / assumes a second resource in the first resource for carrying the PDSCH based on at least second information.

[0079] For example, the terminal device receives first information of a physical downlink shared channel (PDSCH) on a first resource based on an indication from a network device, confirming that the first resource is a PDSCH for carrying a PDSCH or SPS scheduled by a PDCCH, the PDCCH being scrambled by a C-RNTI, MCSI-C-RNTI or CS-RNTI, and the first resource being a PRB, but not limited thereto. The terminal device determines that the CSI-RS is transmitted in the first resource based on the second information related to the CSI-RS, then the terminal device assumes that the REs in the first resource that are not used for the NZP CSI-RS can be used for PDSCH resource mapping, and / or, during activation / triggering of the ZP CSI-RS, the terminal device determines / assumes that the ZP CSI-RS is declared as not available for PDSCH.

[0080] In some embodiments, the terminal device determines a second resource in the first resource for carrying the PDSCH based on the second information (eg, CSI-RS configuration information).

[0081] For example, taking a PRB in the first resource as an example. The terminal device determines the first NZP CSI-RS RE and the first ZP CSI-RS RE in the one PRB according to the second information (e.g., CSI-RS configuration information); and maps for PRB (per PRB). The terminal device determines the RE in the first resource that is not used for the first NZP CSI-RS RE as a resource element (RE) for carrying the PDSCH; during activation / triggering of the first ZP CSI-RS, the first ZP CSI-RS is declared as not applicable to (not available for) PDSCH.

[0082] In some embodiments, the terminal device determines a second resource in the first resource for carrying the PDSCH based on the second information (eg, CSI-RS indication / triggering / activation information).

[0083] For example, taking one PRB in the first resource as an example. The terminal device determines the second NZP CSI-RS RE and the second ZP CSI-RS RE in the one PRB according to the second information (e.g., CSI-RS indication / triggering / activation information); and maps for PRB (per PRB). The terminal device determines the RE in the first resource that is not used for the second NZP CSI-RS RE as the resource element (RE) for the PDSCH resource mapping; during the activation / triggering of the second ZP CSI-RS, the second ZP CSI-RS is declared as not applicable to PDSCH.

[0084] In some embodiments, the second information includes CSI-RS predefined information and / or network indication information, and the terminal device determines the second resource in the first resource for carrying the PDSCH based on the second information (e.g., CSI-RS predefined information and / or network indication information).

[0085] For example, taking one PRB in the first resource as an example. The terminal device determines the third NZP CSI-RS RE and the third ZP CSI-RS RE in the one PRB according to the second information (e.g., CSI-RS predefined information and / or network indication information); and maps for PRB (per PRB). The terminal device determines the RE in the first resource that is not used for the third NZP CSI-RS RE as the resource element (RE) for the PDSCH resource mapping. The third ZP CSI-RS is declared as not applicable to PDSCH during activation / triggering of the third ZP CSI-RS.

[0086] In some embodiments, the terminal device may determine a third resource related to the CSI-RS in the first resource based on the second information, where the third resource is different from the second resource in the first resource used to carry the PDSCH. For example, the third resource includes the first CSI-RS RE and / or the second CSI-RS RE and / or the third CSI-RS RE, and the CSI-RS RE includes an NZP CSI-RS RE and / or a ZP CSI-RS RE.

[0087] Taking a PRB in the first resource as an example, the second resource is one or more REs mapped to the PDSCH in the first resource, and the third resource is one or more REs related to the CSI-RS in the first resource. The terminal device determines the third resource (for example, which can be called the first CSI-RS RE) based on the second information (for example, CSI-RS configuration information (CSI-RS Resource Setting and / or CSI-RS ResourceSet and / or ResourceMapping)).

[0088] Taking a PRB in the first resource as an example, the second resource is one or more REs carrying PDSCH in the first resource, and the third resource is one or more REs related to CSI-RS in the first resource. The terminal device determines the third resource (for example, called the second CSI-RS RE) based on the second information (for example, CSI-RS resource / port indication / trigger / activation information), and the time-frequency resource determined by the CSI-RS resource / port indication / trigger / activation information is the resource occupied by the actual transmission of CSI-RS.

[0089] Taking one PRB in the first resource as an example, the second resource is one or more REs carrying PDSCH in the first resource, and the third resource is one or more REs related to CSI-RS in the first resource. The terminal device determines the third resource (for example, called the third CSI-RS RE) based on second information (for example, CSI-RS network indication information or predefined information); the second information (for example, CSI-RS network indication information or predefined information) can be DCI signaling or MAC CE signaling. Therefore, the terminal device at least determines that the second resource in the first resource used to carry the PDSCH is not the third resource, that is, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource. There can be multiple PDSCH resource mapping schemes. For example, the terminal device assumes that the PDSCH in the first resource is not mapped to the third resource configured by the high-level parameter CSI-RS-ResourceMapping (for example, the first CSI-RS RE), or the terminal device assumes that the PDSCH in the first resource is not mapped to the third resource corresponding to the CSI-RS resource / port indication / trigger / activation information (for example, the second CSI-RS RE), that is, it is assumed that the PDSCH in the first resource is not mapped to the time-frequency resources occupied by the actual transmission of the CSI-RS, or it is assumed that the PDSCH is not mapped to the third resource corresponding to the CSI-RS network indication information and / or predefined information (for example, the third CSI-RS RE). The CSI-RS includes NZP CSI-RS and / or ZP CSI-RS, and the CSI-RS RE includes NZP CSI-RS RE and / or ZP CSI-RS RE.

[0090] The above schematically illustrates resource mapping in accordance with an embodiment of the present application. The terms "carrying" and "mapping" in the embodiments of the present application may have roughly the same meaning. For example, resources carrying PDSCH may be understood as resources to which PDSCH data is mapped, and carrying PDSCH may be replaced by PDSCH resource mapping. The embodiments of the present application do not limit these contents. The following further illustrates network energy saving as an example.

[0091] In the embodiments of the present application, the spatial / energy domain element adjustment technologies related to network energy saving can be divided into two types.

[0092] Figure 3 illustrates spatial / energy domain element adjustments. As shown on the left side of Figure 3, Type 1 adjustments enable or disable all antennas (factors) associated with a logical antenna port. In this method, the network device can disable all antennas (factors) corresponding to one or more antenna ports. While the transmission power of each port remains unchanged, the total number of antenna ports is reduced. Therefore, this adjustment directly affects the number of antenna ports.

[0093] As shown in the right part of Figure 3, Type 2 adjustment is to enable or disable some antenna factors associated with a logical antenna port. In this way, the network device can shut down some antennas (factors) corresponding to all antenna ports. After shutdown, the number of antenna ports remains unchanged, but the transmission power of each port decreases. Therefore, this adjustment affects the beamforming gain of the network device and thus affects the transmission power of the reference signal.

[0094] For example, the NZP CSI-RS resource configuration for channel measurement in network energy-saving spatial domain adjustment may include at least:

[0095] - First resource configuration type (e.g., A1-1-revised type): A resource set in a resource setting includes one or more resources, where a resource is associated with a spatial adaptation pattern;

[0096] - Second resource configuration type (e.g., A1-2-revised type): A resource set in a resource setting includes one or more resources, where a resource can be associated with one or more spatial adaptation patterns.

[0097] For another example, the NZP CSI-RS resource configuration for channel measurement in network energy-saving energy domain adjustment includes:

[0098] -Second resource configuration type (e.g., A1-2-revised type): A resource set in a resource setting includes at least one resource, wherein a resource can be associated with one or more power offset values, that is, a resource can be associated with one or more energy domain adjustment patterns.

[0099] In some embodiments, the binding relationship between the spatial / energy domain adjustment type and the resource configuration can be at least one of the following: the spatial domain adjustment of type 1 supports the second resource configuration type (for example, the A1-2-revised type); the spatial domain adjustment of type 2 supports the first resource configuration type (for example, the A1-1-revised type); the energy domain adjustment can support the second resource configuration type (for example, the A1-2-revised type).

[0100] In some embodiments, the CSI reporting configuration includes multiple sub-configurations.

[0101] For example, a CSI reporting configuration may include L sub-configurations, where each sub-configuration corresponds to a spatial / energy domain adjustment mode and each sub-configuration corresponds to a CSI result. If L in the CSI reporting configuration is greater than 1, each sub-configuration includes the following information:

[0102] For example, for type 1 spatial domain adjustment using the second resource configuration type (e.g., A1-2-revised type), each subconfiguration contains one or more of the following information: N1, N2 information for a single antenna panel, and N1, N2, Ng information for a multi-antenna panel; bitmap-based port subset indication information, where one bit corresponds to one port; codebook subset restriction information; and rank restriction information.

[0103] For example, for type 2 spatial domain adjustment using the first resource configuration type (e.g., A1-1-revised type), each sub-configuration contains the following information: a CSI-RS resource ID list, which may contain one CSI-RS resource ID or multiple CSI-RS resource IDs, so that one sub-configuration can be associated with at least one CSI-RS resource ID.

[0104] For another example, for energy domain adjustment, each sub-configuration is associated with a power offset (powerControlOffset).

[0105] In some embodiments, the association between CSI-RS resource configuration and sub-configuration is as follows:

[0106] For example, for the first resource configuration type (for example, the A1-1-revised type), one or more CSI-RS resources in a CSI-RS resource set for channel measurement can be associated with the same sub-configuration provided in the CSI reporting configuration, that is, a sub-configuration in the CSI reporting configuration can be associated with one or more CSI-RS resources in a CSI-RS resource set for channel measurement; wherein the resources in the resource set for channel measurement have the same number of antenna ports.

[0107] For another example, for the second resource configuration type (e.g., A1-2-revised type), all CSI-RS resources (which may be one or more) in the CSI-RS resource set for channel measurement are associated with each sub-configuration provided in the CSI report configuration, that is, each CSI-RS resource is associated with all sub-configurations, and the resources in the resource set for channel measurement have the same number of antenna ports.

[0108] In some embodiments, the CSI reporting process for a configuration that includes one or more sub-configurations is as follows: For a CSI reporting configuration that includes L sub-configurations, a framework needs to be supported so that a terminal device can report N CSIs at a reporting time, where N CSIs are associated with N sub-configurations in L (where 1≤N≤L), and each CSI corresponds to one sub-configuration. Where N=1 represents a single CSI report, and N>1 represents multiple CSI reports.

[0109] For semi-continuous / aperiodic CSI reporting, the base station supports triggering / indicating / activating N CSI reports in L, where 1≤N≤L; the maximum values ​​of L and N depend on the terminal capabilities. The specific triggering mechanism is as follows:

[0110] - For PUSCH-based aperiodic CSI and semi-persistent CSI reporting, support for DCI-based triggering:

[0111] For example, a trigger state associated with N sub-configurations is indicated by the CSI request field in the existing DCI. Different trigger states can represent different subsets of the L sub-configurations. Wherein, the DCI is UE-specific (in this case, the traditional DCI format applies);

[0112] For example, for A-CSI-RS, the CPU and CSI-RS resource / port calculations depend on the indicated N sub-configurations.

[0113] - For PUCCH-based semi-persistent CSI reporting, support for MAC CE-based triggering:

[0114] For example, it supports selecting indication information of N sub-configurations in one MAC-CE.

[0115] The above describes the CSI reporting related to the embodiments of the present application, but the present application is not limited thereto.

[0116] For PDSCH resource mapping in network energy-saving scenarios, for example, for each antenna port used to transmit a physical channel, the network device maps duplicate symbols to the REs of the VRB used for transmission based on the downlink power allocation, with one duplicate symbol mapped to one RE. The mapping to REs is in ascending order starting from the lowest index on the allocated VRB, where the lowest index corresponds to the first subcarrier of the lowest-frequency VRB.

[0117] If the terminal device receives the CSI-RS resource configuration information of the second information of the network device, and receives the CSI-RS indication / triggering / activation information of the second information, the mapped RE needs to meet the following requirements: if a PRB is used for a PDSCH scheduled by a PDCCH scrambled by a C-RNTI, MCSI-C-RNTI or CS-RNTI, or is a PDSCH for SPS, then the REs in the PRB that cannot be used for the NZP CSI-RS can be used for PDSCH resource mapping; and during the activation / triggering of the ZP CSI-RS, the ZP CSI-RS is declared as not applicable to PDSCH.

[0118] The following will first be explained by taking the example of the terminal device determining the PDSCH resource mapping in the type 1 spatial domain adjustment based on the second resource configuration type (for example, the A1-2-revised type) as an example.

[0119] For example, the second resource configuration type (for example, A1-2-revised type) is that a CSI-RS resource can be associated with one or more spatial adaptation patterns. Type 1 spatial adjustment is to enable or disable all antennas (factors) associated with a logical antenna port. The transmission power of each port remains unchanged, and the total number of antenna ports may be reduced. This adjustment will directly affect the number of antenna ports.

[0120] In some embodiments, specific implementation steps of type 1 airspace adjustment based on the second resource configuration type (e.g., A1-2-revised type) are as follows:

[0121] The terminal device receives first information from the network device and determines that the first resource is used to carry a PDSCH scheduled by a PDCCH or a PDSCH for SPS, where the PDCCH is scrambled by a C-RNTI, MCSI-C-RNTI, or CS-RNTI. The first resource is one or more PRBs, but is not limited thereto.

[0122] -The terminal device receives second information from the network device (for example, CSI-RS resource configuration information), where the resource configuration information includes at least one CSI resource setting for channel measurement, and the CSI resource setting includes one or more CSI-RS resource sets (ResourceSet); the CSI-RS resource set (ResourceSet) is a second resource configuration type (for example, A1-2-revised type), that is, a CSI-RS resource set (resource set) includes at least one CSI-RS resource (resource), wherein a CSI-RS resource can be associated with one or more spatial adaptation patterns. In addition, each CSI-RS resource includes a ResourceMapping IE, which is used to determine information such as the time-frequency position and number of ports of the CSI-RS resource. The time domain position l0∈{0, 1, ..., 13} and l1∈{2, 3, ..., 12} are provided by the high-level parameters firstOFDMSymbolInTime Domain and firstOFDMSymbolInTimeDomain2, respectively. The time domain position parameter defines the relative value of the slot start position. The frequency domain position is provided by the high-level parameter frequencyDomainAllocation, and the number of CSI-RS ports is provided by the high-level parameter nrofPort.

[0123] -The terminal device receives second information (e.g., CSI-RS resource / port indication / trigger / activation information) from the network device; the CSI-RS resource / port indication / trigger / activation information is used to indicate at least one CSI-RS port among the M ports of the CSI-RS resource. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS port, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS port.

[0124] For example, for semi-persistent CSI-RS resources, the indication / triggering / activation information of the CSI-RS resource / port is carried by a MAC CE. The MAC CE can be an existing semi-persistent CSI-RS activation / deactivation MAC CE, which uses the existing MAC CE, or a newly defined MAC CE, which is only used for the indication / triggering / activation information of the CSI-RS resource / port; the MAC CE includes multiple first fields, the first field is one bit wide, the first field represents a port or a CDM group, and the first field is used to indicate / trigger / activate a port or a CDM group, where setting it to 1 indicates that the corresponding port is indicated / triggered / activated, and setting it to 0 indicates that the corresponding port is not indicated / triggered / activated. The MAC CE may also include a second field, the second field taking a value (e.g., 1 or 0) representing that the first field is used to indicate the CSI-RS port, and the second field taking another value (e.g., 0 or 1) representing that the first field is used to indicate the CSI-RS resource.

[0125] For example, for aperiodic CSI-RS resources, the indication / triggering / activation information of the CSI-RS resources / ports is carried by DCI; the DCI follows the existing signaling and is used for both aperiodic CSI reporting activation / deactivation, aperiodic CSI-RS resource activation / deactivation, and indication / triggering / activation of aperiodic CSI reporting sub-configuration and indication / triggering / activation of aperiodic CSI-RS resources / ports. The aperiodic CSI-RS is associated with aperiodic CSI reporting, and the indicated / triggered / activated aperiodic CSI-RS resources / ports are the CSI-RS resource ID list or port subset indication information contained in the sub-configuration of the indicated / triggered / activated aperiodic CSI reporting.

[0126] -The terminal device determines that REs not used for CSI-RS in the PRB can be used for PDSCH resource mapping.

[0127] For example, the terminal device determines the third resource in the first resource based on the following method, where the first resource is the PRB determined based on the first information, and the third resource is the resource related to the CSI-RS in the first resource, that is, the RE of the CSI-RS in the PRB, so the third resource can be the first CSI-RS RE, or the second CSI-RS RE, or the third CSI-RS RE.

[0128] In some embodiments, the terminal device determines a third resource (e.g., a first CSI-RS RE) in the first resource based on second information (e.g., CSI-RS resource configuration information (CSI-RS Resource Setting and / or CSI-RS ResourceSet and / or ResourcMapping)); the terminal device at least determines that the second resource in the first resource used to carry the PDSCH is not the third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0129] For example, the high-level parameter nrofPort of the ResourcMapping IE in the CSI-RS resource configuration is configured to 32, indicating that the terminal device is configured with 32-port CSI-RS resources, with port indexes 0 to 31. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information from the network device, and the information is used to indicate / trigger / activate one or more ports to be activated. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates ports 0 to 7, i.e., the first 8 ports of 32 ports. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource / port, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource / port. Analyzing based on the above example, the CSI-RS is transmitted on ports 0 to 7, and resource mapping is performed on ports 0 to 7. In this case, the RE of the CSI-RS in the PRB used for PDSCH resource mapping is still determined by the time-frequency resources corresponding to all CSI-RS ports nrofPort, that is, the RE of the CSI-RS in the PRB is still determined by ResourcMapping. Analyzing based on the above example, PDSCH resource mapping is avoided according to the CSI-RS resources of ports 0 to 31, that is, CSI-RS ports 0 to 31 in the PRB cannot be used for PDSCH resource mapping, the time-frequency resources corresponding to CSI-RS ports 0 to 31 in the PRB are not available to PDSCH, and PDSCH does not perform resource mapping on the time-frequency resources corresponding to CSI-RS ports 0 to 31.

[0130] In some embodiments, the terminal device determines the third resource (e.g., the second CSI-RS RE) in the first resource based on the second information (e.g., CSI-RS resource / port indication / trigger / activation information), that is, the RE of the CSI-RS in the PRB is determined based on the RE occupied by the actual transmission of the CSI-RS; the terminal device at least determines that the second resource in the first resource used to carry the PDSCH is not the third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0131] For example, the high-level parameter nrofPort of the ResourceMapping IE in the CSI-RS resource configuration is configured to 32, indicating that the terminal device is configured with 32-port CSI-RS resources, with port indexes 0 to 31. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information of the network device, and the information is used to indicate / trigger / activate one or more ports. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates ports 0 to 7, i.e., the first 8 ports of 32 ports. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource / port, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource / port. Analyzing based on the above example, the CSI-RS is transmitted on ports 0 to 7, and resource mapping is performed on ports 0 to 7. In this case, the RE of the CSI-RS in the PRB used for PDSCH resource mapping is determined by the time-frequency resources corresponding to the port indicated by the CSI-RS resource / port indication / trigger / activation information. In the above example, PDSCH resource mapping avoids CSI-RS ports 0 to 7. That is, CSI-RS ports 0 to 7 in the PRB cannot be used for PDSCH resource mapping. The time-frequency resources corresponding to CSI-RS ports 0 to 7 in the PRB are unavailable for PDSCH, and PDSCH is not mapped to the time-frequency resources corresponding to CSI-RS ports 0 to 7. This improves time-frequency resource utilization and achieves significant energy savings.

[0132] In some embodiments, the terminal device determines a third resource (e.g., a third CSI-RS RE) based on the CSI-RS network indication and / or predefined information of the second information; the terminal device at least determines that the second resource used to carry the PDSCH in the first resource is not the third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0133] For example, the high-level parameter nrofPort of the ResourcMapping IE in the CSI-RS resource configuration is configured to 32, indicating that the terminal device is configured with 32-port CSI-RS resources, i.e., port indexes 0 to 31. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information from the network device, and the information is used to indicate / trigger / activate one or more ports. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates ports 0 to 7, i.e., the first 8 ports of 32 ports. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource / port, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource / port. Analyzing based on the above example, the CSI-RS is transmitted on ports 0 to 7, and resource mapping is performed on ports 0 to 7. The terminal device receives another network indication information, which can be a DCI or MAC CE bearer, used to indicate at least one port of CSI-RS, and the port indicated by the indication information is different from the port indicated by the CSI-RS resource / port indication / trigger / activation information. Analyzing based on the above example, the network indication information in this embodiment indicates ports 0 to 15 of the CSI-RS. In this case, the RE of the NZP CSI-RS in the PRB used for PDSCH resource mapping is determined by the network indication information. Analyzing based on the above example, the PDSCH resource mapping is avoided according to the CSI-RS resources of ports 0 to 15, that is, CSI-RS ports 0 to 15 in the PRB cannot be used for PDSCH resource mapping, and the time-frequency resources corresponding to CSI-RS ports 0 to 15 in the PRB are not available to PDSCH, and PDSCH does not perform resource mapping on the time-frequency resources corresponding to CSI-RS ports 0 to 15. As a result, the utilization rate of time-frequency resources is improved, and the dynamic changes in base station signaling are small.

[0134] The following is an example of a terminal device determining the RE of the NZP CSI-RS in type 2 spatial domain adjustment based on the first resource configuration type (for example, A1-1-revised type) to illustrate.

[0135] For example, the first resource configuration type (for example, A1-1-revised type) is that a CSI-RS resource can be associated with a spatial adaptation pattern. Type 2 spatial adaptation is to enable or disable part of the antennas (factors) associated with a logical antenna port. The transmission power of each port may change, and the total number of antenna ports remains unchanged.

[0136] In some embodiments, specific implementation steps of type 1 airspace adjustment based on the first resource configuration type (e.g., A1-1-revised type) include:

[0137] -The terminal device receives first information from the network device to determine whether the first resource is used to carry a PDSCH scheduled by a PDCCH scrambled by a C-RNTI, MCSI-C-RNTI or CS-RNTI, or a PDSCH used for SPS.

[0138] -The terminal device receives second information (e.g., CSI-RS resource configuration information) from the network device, wherein the resource configuration information includes at least one CSI resource setting for channel measurement, the CSI resource setting including at least one CSI-RS resource set (ResourceSet); the CSI-RS resource set (ResourceSet) is of a first resource configuration type (e.g., A1-1-revised type), i.e., a CSI-RS resource set in a CSI-RS resource setting includes at least one resource, wherein a CSI-RS resource is associated with only one spatial adaptation pattern. Each CSI-RS resource includes a ResourceMapping IE and a higher-layer parameter powerControlOffsetSS; the higher-layer parameter powerControlOffsetSS is used to configure the ratio of the CSI-RS EPRE to the SSB EPRE. In type 2 spatial domain adjustment based on the first resource configuration type (e.g., A1-1-revised type), different resources in a resource set can be configured with different powerControlOffsetSS values, that is, CSI-RS resources are configured with different power offset values.

[0139] -The terminal device receives second information from the network device (e.g., indication / triggering / activation information of a CSI-RS resource / port), where the indication / triggering / activation information of the CSI-RS resource / port is used to indicate at least one CSI-RS resource in the CSI-RS resource set (ResourceSet). The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource.

[0140] For example, for semi-persistent CSI-RS resources, the indication / triggering / activation information of the CSI-RS resource / port is carried by a MAC CE. The MAC CE can be an existing semi-persistent CSI-RS activation / deactivation MAC CE, which uses the existing MAC CE, or a newly defined MAC CE, which is only used for the indication / triggering / activation information of the CSI-RS resource / port. The MAC CE includes multiple first fields, the first field has a bit width of one bit, the first field represents a CSI-RS resource or a CSI-RS resource group, and the first field is used to indicate / trigger / activate a CSI-RS resource or a CSI-RS resource group, wherein setting it to 1 indicates that the corresponding resource is indicated / triggered / activated, and setting it to 0 indicates that the corresponding resource is not indicated / triggered / activated. The MAC CE may also include a one-bit second field, when the second field takes a value (for example, 1), it indicates that the first field is used to indicate the CSI-RS port, and when the second field takes another value (for example, 0), it indicates that the first field is used to indicate the CSI-RS resource.

[0141] For example, for aperiodic CSI-RS resources, the indication / triggering / activation information of the CSI-RS resources / ports is carried by DCI; the DCI uses existing signaling and is used for both aperiodic CSI reporting activation / deactivation, aperiodic CSI-RS resource activation / deactivation, and indication / triggering / activation of aperiodic CSI reporting sub-configuration and indication / triggering / activation of aperiodic CSI-RS resources / ports. The aperiodic CSI-RS is associated with aperiodic CSI reporting, and the indicated / triggered / activated aperiodic CSI-RS resources / ports are the CSI-RS resource / port information contained in the indicated / triggered / activated aperiodic CSI reporting sub-configuration.

[0142] - The terminal device determines, based on the first information, that the first resource is used to carry a PDSCH scheduled by a PDCCH scrambled by a C-RNTI, MCSI-C-RNTI, or CS-RNTI, or a PDSCH for SPS; and the terminal device determines, based on the second information, that a CSI-RS is transmitted within the PRB. Therefore, REs in the first resource that are not used for NZP CSI-RS can be used for PDSCH resource mapping.

[0143] For example, the terminal device determines the RE of the CSI-RS in the first resource based on the following method, that is, the RE related to the CSI-RS in the first resource is the third resource, which can be the first CSI-RS RE, or the second CSI-RS RE, or the third CSI-RS RE.

[0144] In some embodiments, the terminal device determines the third resource (e.g., the first CSI-RS RE) in the first resource based on second information (e.g., CSI-RS resource configuration information (CSI-RS Resource Setting and / or CSI-RS ResourceSet and / or ResourcMapping)); the terminal device at least determines that the second resource in the first resource used to carry the PDSCH is not the third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0145] For example, the CSI-RS resource set includes 8 CSI-RS resources, namely CSI-RS resource indexes 0 to 7. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information from the network device, which is used to indicate / trigger / activate at least one CSI-RS resource. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates the CSI-RS resource indexes 0 to 1. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource. Analyzing based on the above example, the CSI-RS is transmitted on CSI-RS resources 0 to 1, and resource mapping is performed on CSI-RS resources 0 to 1. In this case, the RE of the NZP CSI-RS in the PRB used for PDSCH resource mapping is still determined by all CSI-RS resources contained in the resource set (CSI-RS ResourceSet) in the CSI-RS resource configuration information. In the above example, PDSCH resource mapping is avoided according to CSI-RS resources 0 to 7. In other words, CSI-RS resources 0 to 7 cannot be used for PDSCH resource mapping, CSI-RS resources 0 to 7 are unavailable for PDSCH, and PDSCH is not resource mapped on CSI-RS resources 0 to 7. Therefore, the standardization impact is small and the standardization work is less.

[0146] In some embodiments, the terminal device determines the third resource (e.g., the second CSI-RS RE) in the first resource based on the second information (e.g., CSI-RS resource / port indication / trigger / activation information), that is, the NZP CSI-RS resource in the first resource is determined based on the RE occupied by the actual transmission of the NZP CSI-RS; the terminal device at least determines that the second resource in the first resource used to carry the PDSCH is not the third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0147] For example, the CSI-RS resource set includes 8 CSI-RS resources, namely CSI-RS resource indexes 0 to 7. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information from the network device, which is used to indicate / trigger / activate at least one CSI-RS resource. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates the CSI-RS resource indexes 0 to 1. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource. Analyzing based on the above example, the CSI-RS is transmitted on CSI-RS resources 0 to 1, and resource mapping is performed on CSI-RS resources 0 to 1. In this case, the RE of the NZP CSI-RS in the PRB used for PDSCH resource mapping is determined by the CSI-RS resource indicated by the CSI-RS resource / port indication / trigger / activation information. In the above example, PDSCH resource mapping is avoided according to CSI-RS resources 0 to 1, that is, CSI-RS resources 0 to 1 cannot be used for PDSCH resource mapping, CSI-RS resources 0 to 1 are unavailable to PDSCH, and PDSCH is not mapped on CSI-RS resources 0 to 1. As a result, the time-frequency resource utilization is high and the energy saving gain is high.

[0148] In some embodiments, the terminal device determines a third resource (e.g., a third CSI-RS RE) based on second information (e.g., a CSI-RS network indication and / or predefined information), and the terminal device at least determines that the second resource used to carry the PDSCH in the first resource is not a third resource, or in other words, the terminal assumes that the PDSCH in the first resource is not mapped to the third resource.

[0149] For example, the CSI-RS resource set includes 8 CSI-RS resources, namely CSI-RS resource indexes 0 to 7. The terminal device receives the CSI-RS resource / port indication / trigger / activation information of the second information from the network device, which is used to indicate / trigger / activate at least one CSI-RS resource. Analyzing based on the above example, the CSI-RS resource / port indication / trigger / activation information indicates the CSI-RS resource indexes 0 to 1. The terminal device assumes that the CSI-RS is transmitted on the indicated / triggered / activated CSI-RS resource, and the terminal device performs CSI measurement based on the indicated / triggered / activated CSI-RS resource. Analyzing based on the above example, the CSI-RS is transmitted on CSI-RS resources 0 to 1, and resource mapping is performed on CSI-RS resources 0 to 1. The terminal device receives another network indication information, which can be a DCI or MAC CE bearer, and is used to indicate at least one CSI-RS resource in the CSI-RS resource set, and the CSI-RS resource indicated by the indication information is different from the CSI-RS resource indicated by the CSI-RS resource / port indication / trigger / activation information. Taking the above example as an analysis, CSI-RS resources 0 to 3 are indicated in this embodiment. In this case, the RE of the NZP CSI-RS in the PRB used for PDSCH resource mapping is determined by the CSI-RS resource indicated by the network indication information. Taking the above example as an analysis, PDSCH resource mapping is avoided according to CSI-RS resources 0 to 3, that is, CSI-RS resources 0 to 3 cannot be used for PDSCH resource mapping, CSI-RS resources 0 to 3 are not available to PDSCH, and PDSCH does not perform resource mapping on CSI-RS resources 0 to 3. As a result, the time-frequency resource utilization is high, the energy-saving gain is high, and the base station signaling dynamics is small.

[0150] The above describes the resource mapping in the embodiment of the present application, but the present application is not limited thereto.

[0151] In some embodiments, the terminal device determines (assumes) to transmit CSI-RS on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports; and the terminal device performs CSI measurement based on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports.

[0152] The above briefly describes CSI measurement, etc. For details about CSI measurement and CSI-RS, please refer to the relevant technologies.

[0153] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0154] It can be seen from the above embodiments that even in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can efficiently and accurately map PDSCH resources and reach a consensus, and terminal equipment can accurately receive PDSCH, thereby improving the utilization of time-frequency resources and enhancing energy-saving gains.

[0155] Embodiments of the second aspect

[0156] The embodiment of the present application provides a method for sending a downlink data channel, which is described from the perspective of a network device. The embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as the embodiment of the first aspect will not be repeated.

[0157] FIG4 is a schematic diagram of a method for transmitting a downlink data channel according to an embodiment of the present application. As shown in FIG4 , the method includes:

[0158] 401. A network device sends first information to a terminal device, wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource.

[0159] 402. The network device sends the physical downlink shared channel to the terminal device; wherein, the second information related to the CSI-RS resource is used by the terminal device to determine the second resource carrying the PDSCH in the first resource.

[0160] It is worth noting that FIG4 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG4 above.

[0161] In some embodiments, the first resource is a physical resource block (PRB) carrying or corresponding to the PDSCH, and the second resource is one or more resource elements (REs) not used for the channel state information reference signal (CSI-RS).

[0162] In some embodiments, the physical resource blocks (PRBs) are used for PDSCH scheduled by PDCCH, the PDCCH is scrambled by C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource blocks (PRBs) are used for PDSCH of SPS.

[0163] In some embodiments, the second information is used to configure and / or indicate CSI-RS resources;

[0164] For example, the CSI-RS resources include NZP CSI-RS resources and / or ZP CSI-RS resources, but are not limited thereto.

[0165] In some embodiments, the second information includes information related to CSI-RS configuration, the second information includes CSI resource settings for channel measurement, and the CSI resource settings include at least one CSI resource set.

[0166] In some embodiments, the CSI resource set is at least one NZP CSI-RS resource set and / or SSB (SS / PBCH block) set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

[0167] In some embodiments, the second information includes information related to CSI-RS configuration, and the second information includes one or more ZP CSI-RS resource sets (resource sets), and the ZP CSI-RS resource sets include at most 16 ZP CSI-RS resources (resources).

[0168] In some embodiments, the NZP CSI-RS resource and / or the ZP CSI-RS resource includes a resource mapping information element (Resource Mapping IE), and the resource mapping information element is used to determine the time-frequency resource and / or port information of the CSI-RS.

[0169] In some embodiments, the second information includes information related to the CSI-RS indication, and the second information is used to indicate / trigger / activate at least one CSI-RS resource in a CSI resource set, and / or, the second information is used to indicate / trigger / activate at least one CSI-RS port of the CSI-RS resource.

[0170] In some embodiments, CSI-RS is transmitted on indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports; and CSI is measured based on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports.

[0171] In some embodiments, the second information includes information related to CSI-RS configuration, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource for the PDSCH resource mapping based on the third resource.

[0172] For example, the second information is used to determine the first NZP CSI-RS RE and the first ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the first NZP CSI-RS RE is determined as the resource element (RE) for the PDSCH resource mapping.

[0173] In some embodiments, the first ZP CSI-RS is declared as not available for PDSCH during activation / triggering of the first ZP CSI-RS.

[0174] In some embodiments, the second information includes information related to CSI-RS indication, and the second information is used to determine a third resource related to CSI-RS in the first resource, and determine the second resource for the PDSCH resource mapping based on the third resource.

[0175] For example, the second information is used to determine a second NZP CSI-RS RE and a second ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the second NZP CSI-RS RE is determined as a resource element (RE) for the PDSCH resource mapping.

[0176] In some embodiments, the second ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the second ZP CSI-RS.

[0177] In some embodiments, the second information includes predefined information and / or network indication information, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource for the PDSCH resource mapping based on the third resource.

[0178] For example, the predefined information and / or network indication information is used to determine the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the third NZP CSI-RS RE is determined as the resource element (RE) for the PDSCH resource mapping.

[0179] In some embodiments, the third ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the third ZP CSI-RS.

[0180] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0181] It can be seen from the above embodiments that even in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can efficiently and accurately map PDSCH resources and reach a consensus, and terminal equipment can accurately receive PDSCH, thereby improving the utilization of time-frequency resources and enhancing energy-saving gains.

[0182] Embodiments of the third aspect

[0183] The embodiment of the present application provides a receiving device for a downlink data channel. The device may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device. The contents that are the same as those in the embodiment of the first aspect are not repeated here.

[0184] FIG5 is a schematic diagram of a receiving device for a downlink data channel according to an embodiment of the present application. As shown in FIG5 , the receiving device 500 for a downlink data channel includes:

[0185] A first receiving unit 501 receives first information from a network device, where the first information is used to instruct the terminal device to receive the physical downlink shared channel (PDSCH) on a first resource; and

[0186] The second receiving unit 502 receives the physical downlink shared channel; wherein the second resource carrying the PDSCH in the first resource is determined according to the second information related to the CSI-RS.

[0187] In some embodiments, the first resource is a physical resource block (PRB) carrying or corresponding to the PDSCH, and the second resource is one or more resource elements (REs) not used for the channel state information reference signal (CSI-RS).

[0188] In some embodiments, the physical resource blocks (PRBs) are used for PDSCH scheduled by PDCCH, the PDCCH is scrambled by C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource blocks (PRBs) are used for PDSCH of SPS.

[0189] In some embodiments, the second information is used to configure and / or indicate CSI-RS resources;

[0190] For example, the CSI-RS resources include NZP CSI-RS resources and / or ZP CSI-RS resources.

[0191] In some embodiments, the second information includes information related to CSI-RS configuration, the second information includes a CSI resource setting for channel measurement, and the CSI resource setting includes at least one CSI resource set.

[0192] In some embodiments, the CSI resource set is at least one NZP CSI-RS resource set and / or SSB (SS / PBCH block) set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

[0193] In some embodiments, the second information includes information related to CSI-RS configuration, and the second information includes one or more ZP CSI-RS resource sets (resource sets), and the ZP CSI-RS resource sets include at most 16 ZP CSI-RS resources (resources).

[0194] In some embodiments, the NZP CSI-RS resource and / or the ZP CSI-RS resource includes a resource mapping information element (Resource Mapping IE), and the resource mapping information element is used to determine the time-frequency resource and / or port information of the CSI-RS.

[0195] In some embodiments, the second information includes information related to the CSI-RS indication, and the second information is used to indicate / trigger / activate at least one CSI-RS resource in a CSI resource set, and / or, the second information is used to indicate / trigger / activate at least one CSI-RS port of the CSI-RS resource.

[0196] In some embodiments, the second receiving unit 502 further determines (assumes) that CSI-RS is transmitted on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports; and performs CSI measurement based on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports.

[0197] In some embodiments, the second information includes information related to CSI-RS configuration, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0198] For example, the third receiving unit 503 determines the first NZP CSI-RS RE and the first ZP CSI-RS RE in the physical resource block (PRB) according to the CSI-RS configuration information; and determines the RE in the physical resource block (PRB) that is not used for the first NZP CSI-RS RE as the resource element (RE) for the PDSCH resource mapping.

[0199] In some embodiments, the second receiving unit 502 determines / assumes that the first ZP CSI-RS is declared as not available for PDSCH during activation / triggering of the first ZP CSI-RS.

[0200] In some embodiments, the second information includes CSI-RS indication information, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0201] For example, the second receiving unit 502 determines the second NZP CSI-RS RE and the second ZP CSI-RS RE in the physical resource block (PRB) according to the CSI-RS indication information; and determines the RE in the physical resource block (PRB) that is not used for the second NZP CSI-RS RE as the resource element (RE) for the PDSCH resource mapping.

[0202] In some embodiments, the second receiving unit 502 determines / assumes that the second ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the second ZP CSI-RS.

[0203] In some embodiments, the second information includes predefined information and / or network indication information, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0204] For example, the second receiving unit 502 determines the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block (PRB) according to the predefined information and / or network indication information; and determines the RE in the physical resource block (PRB) that is not used for the third NZP CSI-RS RE as the resource element (RE) for the PDSCH resource mapping.

[0205] In some embodiments, the second receiving unit 502 determines / assumes that the third ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the third ZP CSI-RS.

[0206] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The receiving device 500 for the downlink data channel may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0207] In addition, for simplicity, FIG5 only illustrates the connection relationship or signal path between various components or modules. However, those skilled in the art should be aware that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; this application is not limited to this.

[0208] Through the embodiments of the present application, even in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can efficiently and accurately map resources for PDSCH and reach a consensus, and terminal equipment can accurately receive PDSCH, thereby improving the utilization of time-frequency resources and enhancing energy-saving gains.

[0209] Embodiments of the fourth aspect

[0210] The embodiment of the present application provides a downlink data channel transmitting device, which may be, for example, a network device, or one or more components or assemblies configured in the network device, and the contents identical to those in the first and second aspects of the embodiment will not be repeated.

[0211] FIG6 is a schematic diagram of a transmitting device for a downlink data channel according to an embodiment of the present application. As shown in FIG6 , the transmitting device 600 for a downlink data channel includes:

[0212] A first sending unit 601 sends first information to a terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource;

[0213] The second sending unit 602 sends the physical downlink shared channel to the terminal device; wherein the second information related to the CSI-RS resource is used by the terminal device to determine the second resource carrying the PDSCH in the first resource.

[0214] In some embodiments, the first resource is a physical resource block (PRB) carrying or corresponding to the PDSCH, and the second resource is one or more resource elements (REs) not used for the channel state information reference signal (CSI-RS).

[0215] In some embodiments, the physical resource block (PRB) is used for a PDSCH scheduled by a PDCCH, the PDCCH being scrambled by a C-RNTI, an MCSI-C-RNTI, or a CS-RNTI, or the physical resource block (PRB) is used for a PDSCH of an SPS;

[0216] The second information is used to configure and / or indicate CSI-RS resources; the CSI-RS resources include NZP CSI-RS resources and / or ZP CSI-RS resources.

[0217] In some embodiments, the second information includes information related to CSI-RS configuration, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0218] For example, the second information is used to determine the first NZP CSI-RS RE and the first ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the first NZP CSI-RS RE is determined as a resource element (RE) for the PDSCH resource mapping; during activation / triggering of the first ZP CSI-RS, the first ZP CSI-RS is declared as not available for PDSCH.

[0219] In some embodiments, the second information includes information related to CSI-RS indication, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0220] For example, the second information is used to determine a second NZP CSI-RS RE and a second ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the second NZP CSI-RS RE is determined as a resource element (RE) for the PDSCH resource mapping; during activation / triggering of the second ZP CSI-RS, the second ZP CSI-RS is declared as not applicable to PDSCH.

[0221] In some embodiments, the second information includes predefined information and / or network indication information, and the second information is used to determine a third resource related to the CSI-RS in the first resource, and determine the second resource carrying the PDSCH based on the third resource.

[0222] For example, the predefined information and / or network indication information is used to determine the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) not used for the third NZP CSI-RS RE is determined as the resource element (RE) for the PDSCH resource mapping; during the activation / triggering of the third ZP CSI-RS, the third ZP CSI-RS is declared as not applicable to PDSCH.

[0223] In some embodiments, as shown in FIG6 , the apparatus further comprises:

[0224] A processing unit 603 determines (assumes) that a CSI-RS is transmitted on an indicated / triggered / activated NZP CSI-RS resource and / or NZP CSI-RS port.

[0225] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The downlink data channel transmitting device 600 may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0226] In addition, for the sake of simplicity, FIG6 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0227] Through the embodiments of the present application, even in some scenarios of wireless communication applications (such as energy-saving mode), network equipment and terminal equipment can efficiently and accurately map resources for PDSCH and reach a consensus, and terminal equipment can accurately receive PDSCH, thereby improving the utilization of time-frequency resources and enhancing energy-saving gains.

[0228] Embodiments of the fifth aspect

[0229] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

[0230] In some embodiments, the communication system 100 may include at least:

[0231] A network device sends first information for instructing the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; and

[0232] A terminal device receives the physical downlink shared channel; wherein the second resource carrying the PDSCH in the first resource is determined based on the second information related to the CSI-RS resource.

[0233] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0234] Figure 7 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 7, network device 700 may include a processor 710 (e.g., a central processing unit (CPU)) and a memory 720; memory 720 is coupled to processor 710. Memory 720 may store various data and may also store an information processing program 730, which is executed under the control of processor 710.

[0235] For example, the processor 710 may be configured to execute a program to implement the method for sending a downlink data channel as described in the embodiment of the second aspect. For example, the processor 710 may be configured to perform the following control: sending first information to a terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; sending the physical downlink shared channel to the terminal device; wherein second information related to a CSI-RS resource is used by the terminal device to determine a second resource that carries the PDSCH in the first resource.

[0236] Furthermore, as shown in FIG7 , network device 700 may further include a transceiver 740 and an antenna 750, among others. The functions of these components are similar to those in the prior art and are not further described here. It is worth noting that network device 700 does not necessarily include all of the components shown in FIG7 . Furthermore, network device 700 may also include components not shown in FIG7 , for which reference may be made to the prior art.

[0237] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0238] Figure 8 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 8 , terminal device 800 may include a processor 810 and a memory 820. Memory 820 stores data and programs and is coupled to processor 810. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0239] For example, the processor 810 may be configured to execute a program to implement the method for receiving a downlink data channel as described in the embodiment of the first aspect. For example, the processor 810 may be configured to perform the following control: receiving first information from a network device, the first information being used to instruct the terminal device to receive the physical downlink shared channel (PDSCH) on a first resource; and receiving the physical downlink shared channel; wherein a second resource carrying the PDSCH in the first resource is determined based on second information related to a CSI-RS resource.

[0240] As shown in Figure 8 , the terminal device 800 may further include: a communication module 830, an input unit 840, a display 850, and a power supply 860. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 800 does not necessarily include all of the components shown in Figure 8 , and these components are not essential. Furthermore, the terminal device 800 may also include components not shown in Figure 8 , for which reference may be made to the prior art.

[0241] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the method for receiving a downlink data channel described in the embodiment of the first aspect.

[0242] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method for receiving a downlink data channel described in the embodiment of the first aspect.

[0243] An embodiment of the present application further provides a computer program, wherein when the program is executed in a network device, the program enables the network device to execute the method for sending a downlink data channel as described in the embodiment of the second aspect.

[0244] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the method for sending a downlink data channel described in the embodiment of the second aspect.

[0245] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0246] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0247] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0248] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0249] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0250] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0251] 1. A method for receiving a downlink data channel, comprising:

[0252] The terminal device receives first information from the network device, where the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource; and

[0253] The terminal device receives the physical downlink shared channel; wherein the second resource carrying the PDSCH in the first resource is determined based on the second information related to the CSI-RS.

[0254] 2. The method according to Note 1, wherein the first resource is a physical resource block (PRB) that carries or corresponds to the PDSCH, and the second resource is one or more resource elements (RE) that are not used for the channel state information reference signal (CSI-RS).

[0255] 3. The method according to Note 2, wherein the physical resource block (PRB) is used for PDSCH scheduled by PDCCH, the PDCCH is scrambled by C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource block (PRB) is used for PDSCH of SPS.

[0256] 4. The method according to any one of Notes 1 to 3, wherein the second information is used to configure and / or indicate CSI-RS resources;

[0257] The CSI-RS resources include NZP CSI-RS resources and / or ZP CSI-RS resources.

[0258] 5. A method according to any one of Notes 1 to 4, wherein the second information includes information related to the CSI-RS configuration, the second information includes a CSI resource setting for channel measurement, and the CSI resource setting includes at least one CSI resource set.

[0259] 6. The method according to Note 5, wherein the CSI resource set is at least one NZP CSI-RS resource set and / or SSB (SS / PBCH block) set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

[0260] 7. A method according to any one of Notes 1 to 4, wherein the second information includes information related to the CSI-RS configuration, and the second information includes one or more ZP CSI-RS resource sets, and the ZP CSI-RS resource set includes at most 16 ZP CSI-RS resources.

[0261] 8. The method according to any one of Notes 4 to 7, wherein the NZP CSI-RS resources and / or ZP CSI-RS resources include a resource mapping information element (Resource Mapping IE), and the resource mapping information element is used to determine the time-frequency resources and / or port information of the CSI-RS.

[0262] 9. A method according to any one of Notes 1 to 8, wherein the second information includes information related to the CSI-RS indication, the second information is used to indicate / trigger / activate at least one CSI-RS resource in a CSI resource set, and / or the second information is used to indicate / trigger / activate at least one CSI-RS port of a CSI-RS resource.

[0263] 10. The method according to any one of Notes 1 to 9, wherein the method further comprises:

[0264] The terminal device determines (assumes) to transmit CSI-RS on the indicated / triggered / activated NZP CSI-RS resource and / or NZP CSI-RS port; and

[0265] The terminal device performs CSI measurement based on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports.

[0266] 11. The method according to any one of Notes 1 to 10, wherein the second information includes information related to the CSI-RS configuration, and the terminal device determines the second resource carrying the PDSCH in the first resource based on the second information.

[0267] 12. A method according to any one of Notes 1 to 10, wherein the second information includes information related to the CSI-RS configuration, and the terminal device determines a third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0268] 13. The method according to note 12, wherein the terminal device determines the first NZP CSI-RS RE and the first ZP CSI-RS RE in the physical resource block (PRB) according to CSI-RS configuration information; and

[0269] The terminal device determines the REs in the physical resource block (PRB) that are not used for the first NZP CSI-RS REs as resource elements (REs) for PDSCH resource mapping.

[0270] 14. The method according to supplementary note 13, wherein the first ZP CSI-RS is declared as not available for PDSCH during activation / triggering of the first ZP CSI-RS.

[0271] 15. The method according to any one of Notes 1 to 10, wherein the second information includes information related to the CSI-RS indication, and the terminal device determines the second resource carrying the PDSCH in the first resource based on the second information.

[0272] 16. A method according to any one of Notes 1 to 10, wherein the second information includes information related to the CSI-RS indication, and the terminal device determines the third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0273] 17. The method according to note 16, wherein the terminal device determines the second NZP CSI-RS RE and the second ZP CSI-RS RE in the physical resource block (PRB) according to CSI-RS indication information; and

[0274] The terminal device determines the REs in the physical resource block (PRB) that are not used for the second NZP CSI-RS REs as resource elements (REs) for PDSCH resource mapping.

[0275] 18. The method according to Note 17, wherein the second ZP CSI-RS is declared as not applicable to PDSCH during activation / triggering of the second ZP CSI-RS.

[0276] 19. The method according to any one of Notes 1 to 10, wherein the second information includes predefined information and / or network indication information, and the terminal device determines the second resource carrying the PDSCH in the first resource based on the second information.

[0277] 20. A method according to any one of Notes 1 to 10, wherein the second information includes predefined information and / or network indication information, and the terminal device determines a third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0278] 21. The method according to Note 19, wherein the terminal device determines the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block (PRB) according to the predefined information and / or network indication information; and

[0279] The terminal device determines the REs not used for the third NZP CSI-RS REs in the physical resource block (PRB) as resource elements (REs) for PDSCH resource mapping.

[0280] 22. The method according to Note 21, wherein the third ZP CSI-RS is declared as not applicable to PDSCH during activation / triggering of the third ZP CSI-RS.

[0281] 23. A method for transmitting a downlink data channel, comprising:

[0282] The network device sends first information to the terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) on a first resource;

[0283] The network device sends the physical downlink shared channel to the terminal device; wherein, the second information related to the CSI-RS resource is used by the terminal device to determine the second resource that carries the PDSCH in the first resource.

[0284] 24. The method according to Note 23, wherein the first resource is a physical resource block (PRB) that carries or corresponds to the PDSCH, and the second resource is one or more resource elements (RE) that are not used for the channel state information reference signal (CSI-RS).

[0285] 25. The method according to Note 24, wherein the physical resource block (PRB) is used for PDSCH scheduled by PDCCH, the PDCCH is scrambled by C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource block (PRB) is used for PDSCH of SPS.

[0286] 26. The method according to any one of Notes 23 to 25, wherein the second information is used to configure and / or indicate CSI-RS resources;

[0287] The CSI-RS resources include NZP CSI-RS resources and / or ZP CSI-RS resources.

[0288] 27. A method according to any one of Notes 23 to 26, wherein the second information includes information related to the CSI-RS configuration, the second information includes a CSI resource setting for channel measurement, and the CSI resource setting includes at least one CSI resource set.

[0289] 28. The method according to Note 27, wherein the CSI resource set is at least one NZP CSI-RS resource set and / or SSB (SS / PBCH block) set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

[0290] 29. A method according to any one of Notes 23 to 26, wherein the second information includes information related to the CSI-RS configuration, and the second information includes one or more ZP CSI-RS resource sets, and the ZP CSI-RS resource set includes at most 16 ZP CSI-RS resources.

[0291] 30. A method according to any one of Notes 26 to 29, wherein the NZP CSI-RS resources and / or ZP CSI-RS resources include a resource mapping information element (Resource Mapping IE), and the resource mapping information element is used to determine the time-frequency resources and / or port information of the CSI-RS.

[0292] 31. A method according to any one of Notes 23 to 30, wherein the second information includes information related to the CSI-RS indication, the second information is used to indicate / trigger / activate at least one CSI-RS resource in a CSI resource set, and / or the second information is used to indicate / trigger / activate at least one CSI-RS port of the CSI-RS resource.

[0293] 32. A method according to any one of Notes 23 to 31, wherein the CSI-RS is transmitted on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports; and the CSI is measured based on the indicated / triggered / activated NZP CSI-RS resources and / or NZP CSI-RS ports.

[0294] 33. A method according to any one of Notes 23 to 32, wherein the second information includes information related to CSI-RS configuration, and the second information is used to determine the second resource carrying the PDSCH in the first resource.

[0295] 34. A method according to any one of Notes 23 to 32, wherein the second information includes information related to the CSI-RS configuration, and the terminal device determines the third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0296] 35. A method according to Note 34, wherein the second information is used to determine the first NZP CSI-RS RE and the first ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) that is not used for the first NZP CSI-RS RE is determined as a resource element (RE) for PDSCH resource mapping.

[0297] 36. The method according to Note 35, wherein the first ZP CSI-RS is declared as not available for PDSCH during activation / triggering of the first ZP CSI-RS.

[0298] 37. A method according to any one of Notes 23 to 32, wherein the second information includes information related to the CSI-RS indication, and the second information is used to determine the second resource carrying the PDSCH in the first resource.

[0299] 38. A method according to any one of Notes 23 to 32, wherein the second information includes information related to the CSI-RS indication, and the terminal device determines the third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0300] 39. A method according to Note 38, wherein the second information is used to determine the second NZP CSI-RS RE and the second ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) that is not used for the second NZP CSI-RS RE is determined as a resource element (RE) for PDSCH resource mapping.

[0301] 40. The method according to Note 39, wherein the second ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the second ZP CSI-RS.

[0302] 41. A method according to any one of Notes 23 to 32, wherein the second information includes predefined information and / or network indication information, and the second information is used to determine the second resource carrying the PDSCH in the first resource.

[0303] 42. A method according to any one of Notes 23 to 32, wherein the second information includes predefined information and / or network indication information, and the terminal device determines a third resource related to the CSI-RS in the first resource based on the second information, and determines the second resource for carrying the PDSCH based on the third resource.

[0304] 43. A method according to Note 42, wherein the predefined information and / or network indication information is used to determine the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block (PRB); and the RE in the physical resource block (PRB) that is not used for the third NZP CSI-RS RE is determined as a resource element (RE) for PDSCH resource mapping.

[0305] 44. The method according to Note 43, wherein the third ZP CSI-RS is declared as not applicable for PDSCH during activation / triggering of the third ZP CSI-RS.

[0306] 45. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for receiving a downlink data channel as described in any one of Notes 1 to 22.

[0307] 46. ​​A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for sending a downlink data channel as described in any one of Notes 23 to 44.

Claims

1. A receiving device for a downlink data channel, comprising: A first receiving unit, which receives first information from a network device, where the first information is used to instruct a terminal device to receive a physical downlink shared channel at a first resource; as well as A second receiving unit is configured to receive the physical downlink shared channel; wherein a second resource carrying the physical downlink shared channel in the first resource is determined according to second information related to a channel state information reference signal resource.

2. The device according to claim 1, wherein: The first resource is a physical resource block that carries or corresponds to the physical downlink shared channel, and the second resource is one or more resource elements that are not used for the channel state information reference signal.

3. The device according to claim 2, wherein: The physical resource block is used for a physical downlink shared channel scheduled by a physical downlink control channel, the physical downlink control channel is scrambled by C-RNTI, MCSI-C-RNTI or CS-RNTI, or the physical resource block is used for a physical downlink shared channel scheduled semi-persistently.

4. The device according to claim 1, wherein: The second information is used to configure and / or indicate a channel state information reference signal resource; the channel state information reference signal resource includes an NZP CSI-RS resource and / or a ZP CSI-RS resource.

5. The device according to claim 1, wherein: The second information includes information related to a channel state information reference signal configuration, the second information includes a channel state information resource setting for channel measurement, and the channel state information resource setting includes at least one channel state information resource set.

6. The device according to claim 5, wherein: The channel state information resource set is at least one NZP CSI-RS resource set and / or a synchronization signal block set, and the NZP CSI-RS resource set includes at least one NZP CSI-RS resource.

7. The device according to claim 1, wherein: The second information includes information related to channel state information reference signal configuration, and the second information includes one or more ZP CSI-RS resource sets, and the ZP CSI-RS resource set includes at most 16 ZP CSI-RS resources.

8. The device according to claim 4, wherein: The NZP CSI-RS resource and / or the ZP CSI-RS resource includes a resource mapping information element, and the resource mapping information element is used to determine the time-frequency resource and / or port information of the channel state information reference signal.

9. The device according to claim 1, wherein: The second information includes information related to the channel state information reference signal indication, and the second information is used to indicate / trigger / activate at least one channel state information reference signal resource in a channel state information resource set, and / or, the second information is used to indicate / trigger / activate at least one channel state information reference signal port of the channel state information reference signal resource.

10. The device according to claim 1, wherein: The device also includes: A processing unit, which assumes that a channel state information reference signal is transmitted on an indicated / triggered / activated NZP CSI-RS resource and / or an NZP CSI-RS port; and performs channel state information measurement based on the indicated / triggered / activated NZP CSI-RS resource and / or the NZP CSI-RS port.

11. The device according to claim 1, wherein: The second information includes information related to channel state information reference signal configuration, and the second receiving unit determines a second resource carrying the physical downlink shared channel in the first resource according to the second information.

12. The device according to claim 11, wherein The second receiving unit determines a first NZP CSI-RS RE and / or a first ZP CSI-RS RE in a physical resource block according to the second information; and determines a resource element in the physical resource block that is not used for the first NZP CSI-RS RE as a resource element for physical downlink shared channel resource mapping; During activation / triggering of the first ZP CSI-RS, the first ZP CSI-RS is declared as not applicable to a physical downlink shared channel.

13. The device according to claim 1, wherein: The second information includes information related to a channel state information reference signal indication, and the second receiving unit determines a second resource carrying the physical downlink shared channel in the first resource according to the second information.

14. The device according to claim 13, wherein: The second receiving unit determines a second NZP CSI-RS RE and a second ZP CSI-RS RE in a physical resource block according to the second information; and determines a resource element in the physical resource block that is not used for the second NZP CSI-RS RE as a resource element for physical downlink shared channel resource mapping; During activation / triggering of the second ZP CSI-RS, the second ZP CSI-RS is declared as not applicable to a physical downlink shared channel.

15. The device according to claim 1, wherein: The second information includes predefined information and / or network indication information, and the second receiving unit determines a second resource carrying the physical downlink shared channel in the first resource according to the second information.

16. The device according to claim 15, wherein: The second receiving unit determines the third NZP CSI-RS RE and the third ZP CSI-RS RE in the physical resource block according to the predefined information and / or the network indication information; and determines the resource element not used for the third NZP CSI-RS RE in the physical resource block as the resource element for physical downlink shared channel resource mapping; During activation / triggering of the third ZP CSI-RS, the third ZP CSI-RS is declared as not applicable to the physical downlink shared channel.

17. A transmitting device for a downlink data channel, comprising: A first sending unit, which sends first information to a terminal device; wherein the first information is used to instruct the terminal device to receive a physical downlink shared channel at a first resource; A second sending unit sends the physical downlink shared channel to the terminal device; wherein the second information related to the channel state information reference signal resource is used by the terminal device to determine a second resource that carries the physical downlink shared channel in the first resource.

18. The device according to claim 17, wherein: The first resource is a physical resource block that carries or corresponds to the physical downlink shared channel, and the second resource is one or more resource elements that are not used for the channel state information reference signal; The physical resource block is used for a physical downlink shared channel scheduled by a physical downlink control channel, the physical downlink control channel is scrambled by a C-RNTI, an MCSI-C-RNTI or a CS-RNTI, or the physical resource block is used for a physical downlink shared channel of semi-persistent scheduling; The second information is used to configure and / or indicate NZP CSI-RS resources and / or ZP CSI-RS resources.

19. The device according to claim 17, wherein: The second information includes information related to a channel state information reference signal configuration, and the second information is used to determine a first NZP CSI-RS RE and a first ZP CSI-RS RE in the physical resource block; and resource elements in the physical resource block that are not used for the first NZP CSI-RS RE are determined as resource elements for physical downlink shared channel resource mapping; during activation / triggering of the first ZP CSI-RS, the first ZP CSI-RS is declared as not applicable to a physical downlink shared channel; And / or, the second information includes information related to a channel state information reference signal indication, and the second information is used to determine a second NZP CSI-RS RE and a second ZP CSI-RS RE in the physical resource block; and resource elements in the physical resource block that are not used for the second NZP CSI-RS RE are determined to be used for the resource element mapped to a physical downlink shared channel resource; during activation / triggering of the second ZP CSI-RS, the second ZP CSI-RS is declared as not applicable to a physical downlink shared channel; And / or, the second information includes predefined information and / or network indication information, and the predefined information and / or network indication information is used to determine a third NZP CSI-RS RE and a third ZP CSI-RS RE in the physical resource block; And the resource elements in the physical resource block that are not used for the third NZP CSI-RS RE are determined as resource elements for the physical downlink shared channel resource mapping; during the activation / triggering of the third ZP CSI-RS, the third ZP CSI-RS is declared as not applicable to the physical downlink shared channel.

20. A communication system comprising: A network device, which sends first information for instructing a terminal device to receive a physical downlink shared channel on a first resource; as well as A terminal device receives the physical downlink shared channel; wherein a second resource carrying the physical downlink shared channel in the first resource is determined according to second information related to a channel state information reference signal resource.

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