Patent Description:
In order to improve coverage at an edge of a cell to provide a more balanced quality of service in a service area, coordinated multiple point technology is still an important technical means in the NR system. From the perspective of network morphology, network deployment with a large quantity of distributed access points plus centralized baseband processing may be more conducive to providing a balanced user experience rate, and may significantly reduce latency and signaling overhead caused by handover. As frequency bands become higher, relatively dense deployment of access points is also required from the perspective of ensuring network coverage. In a high frequency band, as the integration level of an active antenna equipment increases, it is more inclined to adopt a modularized active antenna array. An antenna array of each TRP (Transmission and Reception Point) may be divided into several relatively independent antenna panels, so that the shape and the quantity of ports of the entire array may be flexibly adjusted according to deployment scenarios and service requirements. The antenna panels or the TRPs may be connected by optical fibers for more flexible distributed deployment. In a millimeter wave band, as the wavelength decreases, the blocking effect produced by obstacles such as a human body or a vehicle becomes more significant. In this case, from the perspective of ensuring robustness of link connection, cooperation among multiple TRPs or panels may be used to transmit/receive with multiple beams from multiple angles, thereby reducing negative effects caused by the blocking effect.

According to a mapping relationship of transmitted signal streams to multiple TRPs/panels, coordinated multiple point transmission technology may be divided into two types: coherent transmission and non-coherent transmission. In coherent transmission, each data layer is mapped onto multiple TRPs/panels through a weighted vector. In non-coherent transmission, each data stream is only mapped to part of the TRPs/panels. Coherent transmission has higher requirements for synchronization among transmission points and transmission capacity of the backhaul link, so it is relatively sensitive to many non-ideal factors in actual deployment conditions. Comparatively speaking, incoherent transmission is less affected by the above factors, so it is a key consideration for multiple point transmission technology.

NC-JT transmission may use a method (single-PDCCH) in which a single PDCCH (physical downlink control channel) schedules a single PDSCH (physical downlink shared channel), or use a method (multi-PDCCH) in which multiple PDCCHs schedule their corresponding PDSCHs.

For the single-PDCCH method, due to closer coordination among transmission points, a more ideal backhaul link is required to exchange CSI and control information. Taking into account differences in channel conditions among the transmission points or the panels, a new codeword mapping method may be required. For example, using <NUM> codewords for less than <NUM> layers may be considered, and independent MCSs (modulation and coding scheme) may be used to respectively match the channel conditions of different transmission points/panels. Using a non-peer-to-peer mapping method for two codewords even may be considered. For signals sent by different transmission points/panels, it is also needed to group DM-RS (demodulation reference signal) ports according to QCL (quasi co-location) relationship, indicate different pieces of QCL information, and design corresponding TCI (transmission configuration indicator) structures and control signalings. In order to support the above enhancements, it may be needed to redesign the DM-RS allocation method in DCI (downlink control information). In addition, it is also needed to consider improvement of the CSI reporting method to support switch between single point transmission and coordinated transmission.

For the multi-PDCCH method, since transmissions of two PDSCHs and corresponding PDCCHs are relatively independent, this method is not sensitive to non-ideal factors such as latency of the backhaul link. In addition, since the various PDSCHs may correspond to different transmission points/panels, independent transmissions of multiple PDSCHs may avoid the complexity of codeword mapping, DMRS port grouping, TCI design, and DMRS port indication. It should be noted that although using a completely flexible scheduling method among multiple PDSCHs may be considered, it is needed to consider using quasi-static coordination among transmission points/panels to avoid interference among PDSCHs or DM-RS ports. Or, certain coordination mechanisms and scheduling restrictions may be used to avoid partial overlap among PDSCHs, so as to ensure accuracy of receiver interference estimation and link adaptation performance. In a case of multi-PDSCH transmission, corresponding uplink and downlink control channel design and HARQ (hybrid automatic repeat request) scheme design also need to be studied.

In addition to eMBB services, coordinated multiple point technology is of great significance for improving reliability of URLLC (ultra-reliable low-latency communication) service transmission. For example, in a high frequency band, the blocking effect may cause a temporary interruption of communication. In this case, coordinated transmission of multiple transmission points/panels may be used to reduce the probability of the signal being blocked. In addition, repeated transmission or diversity transmission of multiple transmission points/panels may be used to improve the reliability of transmission.

The problem in the related technologies is that a correspondence between a TCI state of a DMRS port and a CDM group cannot be determined. Document "<NPL>" discussed enhancements on multi-TRP/panel transmission including improved reliability and robustness with both ideal and non-ideal backhaul: Specify downlink control signalling enhancement(s) for efficient support of non-coherent joint transmission Perform study and, if needed, specify enhancements on uplink control signalling and/or reference signal(s) for non-coherent joint transmission. Multi-TRP techniques for URLLC requirements are included in this WI. Document by <NPL>) discloses considerations for supporting multi-TRP/panel transmission in Rel-<NUM>. Document by <NPL>) discloses the design for multiple PDCCH and single PDCCH based non-coherent joint transmission and enhancement for URLLC with multiple TRPs/panels.

The embodiments of the present disclosure provide a method for receiving information, a method for sending information, a terminal, and a network device, as defined in the appended set of claims. When implementing multiple point transmission, the correspondence between the CDM group and the TCI state can be determined, which improves the reliability of transmission. The scope of the present invention is determined only by the scope of the appended claims.

The beneficial effects of the embodiments of the present disclosure are as follows.

In the above embodiments of the present disclosure, the terminal receives the indication information, where the indication information is used for indicating the at least one transmission configuration indicator TCI state of the demodulation reference signal DMRS port on the one or more resources allocated to the terminal; determines the correspondence between the at least one TCI state on one or more resources and the code division multiplexing CDM group to which the DMRS port belongs; and receives the information according to the correspondence between the TCI state on the one or more resources and the CDM group to which the DMRS port belongs. In this way, the correspondence between the CDM group and the TCI state can be determined in a case of multiple point transmission, which improves the reliability of transmission.

Exemplary embodiments of the present disclosure are described in more detail with reference to the accompanying drawings hereinafter. Although the drawings show exemplary embodiments of the present disclosure, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure as defined by the appended claims to those skilled in the art.

To address the problem in the related technologies that the correspondence between the CDM group and the TCI state cannot be determined, the embodiments of the present disclosure provide a method for receiving information, a method for sending information, a terminal, and a network device. In this way, in a case of multiple point transmission, information can be received according to the correspondence between the CDM group and TCI state, which improves the reliability of transmission. In the following embodiments of the present disclosure, the meaning of "a resource" includes:.

As shown in <FIG>, embodiments of the present disclosure provide a method for receiving information, which is applied to a terminal, and the method includes the following steps.

Step <NUM>: receiving indication information, where the indication information is used for indicating at least one transmission configuration indicator (TCI) state of a demodulation reference signal (DMRS) port on one or more resources allocated to the terminal.

Step <NUM>: determining a correspondence between the at least one TCI state on the one or more resources and a code division multiplexing (CDM) group to which the DMRS port belongs.

Step <NUM>: receiving information according to the correspondence between the TCI state on the one or more resources and the CDM group to which the DMRS port belongs.

In the embodiments, in step <NUM>, the TCI state may include: one or two TCI states; the CDM group may include: <NUM>, <NUM>, or <NUM> CDM groups.

Specifically, step <NUM> may include:
determining that one TCI state on the one or more resources corresponds to N CDM groups, or, determining that two TCI states on the one or more resources correspond to N CDM groups, where N is equal to <NUM>, <NUM>, or <NUM>.

The first case: when DMRS(s) allocated to the UE belongs to one CDM group and one TCI state is indicated to the UE, the CDM group corresponds to the indicated TCI state.

The second case: when DMRS(s) allocated to the UE belongs to two CDM groups, and one TCI state is indicated to the UE, the CDM groups correspond to the indicated TCI state.

The third case: when DMRS(s) allocated to the UE belongs to <NUM> CDM groups, and one TCI state is indicated to the UE, the CDM groups correspond to the indicated TCI state.

The fourth case: when DMRS(s) allocated to the UE belongs to one CDM group and two TCI states are indicated to the UE, the correspondence between the CDM group and the TCI states is determined by the following optional methods:.

The fifth case: When DMRS(s)allocated to the UE belongs to <NUM> CDM groups, and <NUM> TCI states are indicated to the UE, the correspondence between the CDM groups and the TCI states is determined by the following optional methods:.

The sixth case: when DMRS(s)allocated to the UE belongs to <NUM> CDM groups, and <NUM> TCI states are indicated to the UE, the correspondence between the CDM groups and the TCI states is determined by the following optional methods:.

The above <NUM>) may include the follows.

<NUM>) In a case that one resource is allocated to the terminal by the network side through control information, the correspondence between the two TCI states and the one CDM group is a first correspondence; where the first correspondence includes: according to a predefined rule, one TCI state is selected from the two TCI states, and the CDM group corresponds to the selected TCI state; for example, according to the predefined rule, one of the TCI states is selected, and the CDM group correspond to the selected TCI state. For example, the first TCI state is always selected; or,
the correspondence between the two TCI states and the one CDM group is a second correspondence; where the second correspondence includes: according to a DMRS port allocation value indicated in downlink control information (DCI), the correspondence between the two TCIs states and the one CDM group is determined, one DMRS port allocation value corresponds to one TCI state, and the CDM group corresponds to the selected TCI state; for example, a DMRS port allocation value (value as shown in Table <NUM> to Table <NUM>) indicated in the DCI corresponds to a mapping relationship. For example, value m corresponds to the selection of the first TCI state, and value n corresponds to the selection of the second TCI state. The specific value as used is not limited to the cases in Tables <NUM> to <NUM>.

For example, value <NUM> in Table <NUM> corresponds to a situation where DMRS port <NUM> is allocated in a case of single codeword transmission. It may be predefined that: if there are two TCI states, the value corresponds to a case where the first TCI state is selected. In addition, a new value may be added in Table <NUM>, DMRS port <NUM> is allocated for this value, but it corresponds to a case where the second TCI state is selected.

<NUM>) In a case that at least two resources are allocated to the terminal, then on each resource, the CDM group corresponds to one TCI state of the two TCI states. That is, if the network side instructs, through the control information, the terminal to use more than one resource, then on each resource, the CDM group corresponds to one of the TCI states.

Specifically, <NUM>) in a case that at least two time domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of mini slots or slots, one TCI state of the two TCI states is used for mini slots or slots with one type of serial number, and different TCI states are used for mini slots or slots with different types of serial numbers; for example, the network side indicates multiple time domain resources (corresponding to the TDM mode), and the correspondence between the CDM group and the TCI states is associated with serial numbers of mini slots or slots. For example, odd-numbered mini slots or slots use the first TCI state, and even-numbered mini slots or slots use the second TCI state.

<NUM>) in a case that at least two frequency domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of the frequency domain resources, one TCI state of the two TCI states is used for frequency domain resources with one type of serial number, and different TCI states are used for frequency domain resources with different types of serial numbers; for example, the network side indicates multiple frequency domain resources (corresponding to the FDM mode), and the correspondence between the CDM group and the TCI states is associated with serial numbers of the frequency domain resources. For example, odd-numbered frequency domain resources use the first TCI state, and even-numbered frequency domain resources use the second TCI state.

<NUM>) in a case that at least two frequency domain and time domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of the frequency domain or time domain resources, one TCI state of the two TCI states is used for frequency domain or time domain resources with one type of serial number, and different TCI states are used for frequency domain or time domain resources with different types of serial numbers. For example, the network side indicates multiple frequency domain and time domain resources (corresponding to the FDM+TDM mode), and the correspondence between the CDM group and the TCI states is associated with serial numbers of the frequency domain or time domain resources. For example, odd-numbered frequency domain or time domain resources use the first TCI state, and even-numbered frequency domain or time domain resources use the second TCI state.

The above <NUM>) may include the follows:.

Specifically, <NUM>) in a case that at least two time domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of mini slots or slots, one TCI state of the two TCI states is used for mini slots or slots with one type of serial number, and different TCI states are used for mini slots or slots with different types of serial numbers; for example, the network side indicates multiple time domain resources or the network side indicates that the corresponding mode is TDM mode, and the correspondence between the CDM group and the TCI states is associated with serial numbers of mini slots or slots. For example, odd-numbered mini slots or slots use the first TCI state, and even-numbered mini slots or slots use the second TCI state; or,.

In the above <NUM>), determining according to the value indicated in the DMRS table (such as Table <NUM> to Table <NUM> or a new table formed after adding a new value) by the network side may include:.

In the above <NUM>), it may specifically include:.

The above <NUM>) in a case that a DMRS port allocation value that the terminal is configured to use is a fourth set, then on each resource, the <NUM> CDM groups correspond to one TCI state of the two TCI states; that is, if the network side instructs, through control information, the terminal to use a value set Y2, then on each resource, the <NUM> CDM groups correspond to one of the TCI states.

In other embodiments of the present disclosure, the quantity of TCI states may be <NUM> or more, and when there are <NUM> or <NUM> or <NUM> CDM groups, the correspondence between the TCI states and the CDM groups is similar to the correspondence in a case where there are <NUM> TCI states. For example, when there are <NUM> TCI states and <NUM> CDM groups, one of the TCIs is selected, and the CDM groups correspond to the selected TCI; in some cases, it may be that a CDM group <NUM> corresponds to TCI1, a CDM group <NUM> corresponds to TCI2, and a CDM group <NUM> corresponds to TCI3; or, in some cases, it may be that a CDM group <NUM> and a CDM group <NUM> corresponds to TCI1, and a CDM group <NUM> corresponds to TCI3; or, in some cases, it may be that a CDM group <NUM> and a CDM Group <NUM> corresponds to TCI1, and a CDM group <NUM> corresponds to TCI2; which may be determined according to specific implementation scenarios.

In the above embodiments of the present disclosure, by determining the correspondence between the CDM groups and the TCI states, the terminal can determine the used transmission mode and the correspondence between the CDM group and the TCI state, thereby improving the reliability of transmission.

The embodiments of the present disclosure also provide a method for sending information, which is applied to a network device, and the method includes:.

In some embodiments, the correspondence between the at least one TCI state on the one or more resources and the CDM group to which the DMRS port belongs comprises: one TCI state on the one or more resources corresponds to N CDM groups, or, two TCI states on the one or more resources correspond to N CDM groups, where N is equal to <NUM>, <NUM>, or <NUM>.

In some embodiments, in a case that two TCI states on the one or more resources correspond to one CDM group, the correspondence between the TCI state and the CDM group to which the DMRS port belongs comprises: on each resource of the one or more resources, the CDM group corresponding to one TCI state of the two TCI states.

In some embodiments, the CDM group corresponding to one TCI state of the two TCI states comprises: in a case that at least two resources are allocated to the terminal, then on each resource of the at least two resources, the CDM group corresponds to one TCI state of the two TCI states.

In some embodiments, on each resource of the one or more resources, the CDM group corresponding to one TCI state of the two TCI states includes:.

In some embodiments, the method for sending information further includes: in a case that two TCI states on the one or more resources correspond to <NUM> or <NUM> CDM groups, sending signaling to the terminal, where the signaling is used for indicating the correspondence between the two TCI states on the one or more resources and the <NUM> or <NUM> CDM groups.

It should be noted that the above <FIG> and all its implementation manners are applicable to these embodiments, and the same technical effects can also be achieved.

As shown in <FIG> which is not in accordance with the appended claims and given as examples useful for the understanding of the invention, embodiments of the present disclosure also provide a terminal <NUM>, including a processor <NUM>, a transceiver <NUM>, and a memory <NUM>. The memory <NUM> stores a program executable by the processor <NUM>, and the processor <NUM>, when executing the program, performs the following steps:.

The determining the correspondence between the at least one TCI state on the one or more resources and the CDM group to which the DMRS port belongs includes: determining that one TCI state on the one or more resources corresponds to N CDM groups, or, determining that two TCI states on the one or more resources correspond to N CDM groups, where N is equal to <NUM>, <NUM>, or <NUM>.

In a case that there are two TCI states and one CDM group, the determining the correspondence between the TCI state and the CDM group to which the DMRS port belongs includes: determining the correspondence between the two TCI states and the one CDM group according to the resources allocated to the terminal; or, receiving signaling and determining the correspondence between the two TCI states and the one CDM group according to the signaling; or, on each resource, the CDM group corresponding to one TCI state of the two TCI states; or, determining the correspondence between the two TCI states and the one CDM group according to a DMRS port allocation value indicated in a DMRS table by a network side.

The determining the correspondence between the two TCI states and the one CDM group according to the resources allocated to the terminal includes:.

The determining the correspondence between the two TCI states and the one CDM group according to the signaling includes:.

The determining the correspondence between the two TCI states and the one CDM group according to the DMRS port allocation value indicated in the DMRS table by the network side includes:.

On each resource, the CDM group corresponding to one TCI state of the two TCI states includes:.

In a case that there are two TCI states and <NUM> or <NUM> CDM groups, the determining the correspondence between the at least one TCI state and the CDM group to which the DMRS port belongs includes: determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to the resources allocated to the terminal; or, receiving signaling and determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to the signaling; or, determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to a DMRS port allocation value indicated in a DMRS table by a network side.

The determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to the resources allocated to the terminal includes:.

The determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to the signaling includes:.

The determining the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups according to the DMRS port allocation value indicated in the DMRS table by the network side includes:.

On each resource, the <NUM> or <NUM> CDM groups corresponding to one TCI state of the two TCI states includes:.

The at least one CDM group of the <NUM> or <NUM> CDM groups corresponding to one TCI state of the two TCI states includes: according to a predefined rule, one TCI state is selected from the two TCI states, the at least one CDM group of the <NUM> or <NUM> CDM groups corresponds to the selected TCI state, and the remaining CDM groups correspond to the other TCI state; or, according to a DMRS port allocation value indicated in downlink control information (DCI), the correspondence between the two TCI states and the <NUM> or <NUM> CDM groups is determined, one DMRS port allocation value corresponds to two TCI states, and one TCI state corresponds to at least one CDM group.

In the terminal, the transceiver <NUM> and the memory <NUM>, as well as the transceiver <NUM> and the processor <NUM>, may be connected through a bus interface. The functions of the processor <NUM> may be realized by the transceiver <NUM>, and the functions of the transceiver <NUM> may be realized by the processor <NUM>. All the implementations of <FIG> are also applicable to the embodiments of the terminal, and the same technical effects can also be achieved.

The embodiments of the present disclosure also provide a device for receiving information, including:.

All the above implementations of <FIG> are applicable to the embodiments of the device, and the same technical effects can also be achieved.

The embodiments of the present disclosure also provide a network device, including: a processor, a transceiver, and a memory, the memory stores a program executable by the processor, and the processor, where executing, the program, performs the following steps:.

All the above implementations of <FIG> are also applicable to the embodiments of the network device, and the same technical effects can also be achieved.

Embodiments of the present disclosure also provide a device for sending information, which includes:.

The embodiments of the present disclosure also provide a computer storage medium, which has instructions, and the instructions, when being executed by a computer, configure the computer to perform the method on the terminal side or the method on the network device side described above.

In the above embodiments of the present disclosure, by determining the correspondence between the CDM groups and the TCI states, the terminal can determine the used transmission mode and the correspondence between the CDM groups and the TCI states, thereby improving the reliability of transmission.

Those skilled in the art will appreciate that the units and the algorithm steps described in conjunction with the embodiments according to the present disclosure may be implemented in the form of electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or in software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each particular application, and such implementations are not to be considered as departing from the scope of the present disclosure.

Those skilled in the art can clearly understand that, for the sake of easiness and conciseness of description, reference can be made to the corresponding processes in the foregoing method embodiments for specific operating processes of the systems, the devices and the units described above, and a detailed description thereof is not provided herein.

For the embodiments according to the present disclosure, it should be understood that the disclosed device and method may be implemented in other ways. For example, the described embodiments directed to the device are merely exemplary. For example, the units are divided merely in logical function, which may be divided in another way in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the disclosed or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, which may be implemented in electronic, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple network units. Some or all of the units may be selected according to practical needs to achieve the object of the technical solutions of the embodiments.

In addition, functional units in various embodiments of the present disclosure may be integrated into one processing unit, or may be physically independent, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit, and sold or used as a standalone product, it may be stored in a computer readable storage medium. Based on this understanding, essence of the technical solution of the present disclosure, or the part contributing to the related technologies, or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium, and the software product includes a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of method described in the various embodiments of the present disclosure. The storage medium includes a USB flash disk, a mobile hard disk, an ROM, an RAM, a magnetic disk, an optical disk, and other medium which may store program code.

In addition, it should be noted that in the device and the method of the present disclosure, it is apparent that various components or various steps may be decomposed and/or recombined. The decomposition and/or recombination should be considered as equivalents of the present disclosure. Moreover, the steps of performing the above series of processes may naturally be performed in a chronological order or in an order as illustrated, but not necessarily be required to be performed in a chronological order, and some steps may be performed in parallel or independently of each other. It should be noted that, a person ordinary skilled in the art can understand that all or any steps or components of the method and device in the present disclosure may be implemented with hardware, firmware, software or any combination thereof in any computing device (including a processor and a storage medium and so on) or in a network of computing devices, which can be realized by a person skilled in the art with their basic programming skills on the basis of the present disclosure.

Therefore, the objects of the present disclosure may be achieved through running a program or a group of programs on any computing device. The computing device may be a well-known common device. Accordingly, the object of the present disclosure may be achieved by merely providing a program product having program codes for implementing the method or device. That is, such a program product is included in the present disclosure, so is a storage medium storing such a program product thereon. Apparently, the storage medium may be any well-known storage medium or any storage medium developed in the future. It should be further pointed out that, in the device and method of the present disclosure, each component or step may be divided or recombined. The dividing and recombining should be regarded as equivalent solutions of the present disclosure. In addition, the steps in the present disclosure may be performed sequentially according to the described order. It is not required that the steps may only be performed sequentially. Some steps may be performed in parallel or independently.

The various modules, units, subunits or submodules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC), or one or more microprocessors, or one or more digital signal processors (Digital Signal Processor, DSP), or one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc. As another example, when a module described above is implemented in the form of scheduling program codes by a processing element, the processing element may be a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processors that may call program codes. As another example, these modules may be integrated together and implemented as a system-on-a-chip (System-on-a-chip, SOC).

Claim 1:
A method for receiving information, comprising:
receiving (<NUM>) indication information, wherein the indication information is used for indicating at least one transmission configuration indicator, TCI, state of a demodulation reference signal, DMRS, port on one or more resources allocated to a terminal;
determining (<NUM>) a correspondence between the at least one TCI state on the one or more resources and a code division multiplexing, CDM, group to which the DMRS port belongs; and
receiving (<NUM>) information according to the correspondence between the TCI state on the one or more resources and the CDM group to which the DMRS port belongs;
wherein the determining (<NUM>) the correspondence between the at least one TCI state on the one or more resources and the CDM group to which the DMRS port belongs comprises:
determining that two TCI states on the one or more resources correspond to N CDM groups, where N is equal to <NUM>, <NUM>, or <NUM>;
wherein, when N is equal to <NUM>, the determining the correspondence between the TCI state and the CDM group to which the DMRS port belongs comprises:
on each resource of the one or more resources, the CDM group corresponding to one TCI state of the two TCI states;
wherein the CDM group corresponding to one TCI state of the two TCI states comprises:
in a case that at least two resources are allocated to the terminal, then on each resource of the at least two resources, the CDM group corresponding to one TCI state of the two TCI states;
characterized in that, on each resource of the one or more resources, the CDM group corresponding to one TCI state of the two TCI states comprises:
in a case that at least two time domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of mini slots or slots, one TCI state of the two TCI states is used for mini slots or slots with one type of serial number, and different TCI states are used for mini slots or slots with different types of serial numbers; or,
in a case that at least two frequency domain resources are allocated to the terminal, the correspondence between the one CDM group and the TCI states is associated with serial numbers of the frequency domain resources, one TCI state of the two TCI states is used for frequency domain resources with one type of serial number, and different TCI states are used for frequency domain resources with different types of serial numbers.