Configuration of multiple demodulation reference signal patterns

Abstract

Example embodiments of the present disclosure relate to configurations for multiple demodulation reference signal patterns. A terminal device receives, from a network device, a configuration associated with a plurality of demodulation reference signal (DMRS) patterns. The terminal device determines a DMRS pattern from a plurality of DMRS patterns based at least in part on the configuration. In this manner, the DMRS pattern can be dynamically indicated and switched, thereby improving communication performance.

Description

Technical Field

[0001] Various exemplary embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to methods, devices, apparatuses, and computer-readable storage media for configuration of multiple demodulation reference signal patterns. Background Art

[0002] As the communication industry develops, different technologies have been proposed to improve communication performance. For example, multiple-input multiple-output (MIMO) has been proposed. MIMO evolution requires enhancements to communication operations. Summary of the invention

[0003] In a first aspect of the present disclosure, a device is provided. The device includes at least one processor; and at least one memory storing instructions, which, when executed by the at least one processor, causes the device to at least: receive a configuration associated with a plurality of demodulation reference signal patterns from a network device; and determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns based at least in part on the configuration.

[0004] In a second aspect of the present disclosure, a device is provided. The device includes at least one processor; and at least one memory storing instructions, which, when executed by the at least one processor, causes the device to at least: send a configuration associated with a plurality of demodulation reference signal patterns to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0005] In a third aspect of the present disclosure, a method is provided. The method includes: receiving, at a terminal device and from a network device, a configuration associated with a plurality of demodulation reference signal patterns; and determining, based at least in part on the configuration, a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0006] In a fourth aspect of the present disclosure, a method is provided, comprising: sending, at a network device and to a terminal device, a configuration associated with a plurality of demodulation reference signal patterns, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0007] In a fifth aspect of the present disclosure, an apparatus is provided. The apparatus includes: a component for receiving a configuration associated with a plurality of demodulation reference signal patterns from a network device; and a component for determining a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns based at least in part on the configuration.

[0008] In a sixth aspect of the present disclosure, an apparatus is provided. The apparatus includes: a component for sending a configuration associated with a plurality of demodulation reference signal patterns to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0009] In a seventh aspect of the present disclosure, a computer-readable medium is provided. The computer-readable medium includes instructions that, when executed by an apparatus, cause the apparatus to at least perform the following items: receiving a configuration associated with a plurality of demodulation reference signal patterns from a network device; and determining a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns based at least in part on the configuration.

[0010] In an eighth aspect of the present disclosure, a computer-readable medium is provided. The computer-readable medium includes instructions, which, when executed by an apparatus, cause the apparatus to at least perform the following items: sending a configuration associated with a plurality of demodulation reference signal patterns to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0011] It should be understood that the invention summary is not intended to identify the key or essential features of the embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Some example embodiments will now be described with reference to the accompanying drawings, in which:

[0013] Figure 1 An example communication environment is shown in which example embodiments of the present disclosure may be implemented;

[0014] Figure 2 shows a signaling diagram for communication according to some example embodiments of the present disclosure;

[0015] Figure 3 shows a signaling diagram for communication according to some example embodiments of the present disclosure;

[0016] Figure 4 shows a signaling diagram for communication according to some example embodiments of the present disclosure;

[0017] Figure 5 shows a signaling diagram for communication according to some example embodiments of the present disclosure;

[0018] Figure 6 shows a signaling diagram for communication according to some example embodiments of the present disclosure;

[0019] Figure 7A flowchart of a method implemented at a first device according to some example embodiments of the present disclosure is shown;

[0020] Figure 8 A flowchart showing a method implemented at a second device according to some example embodiments of the present disclosure is shown;

[0021] Fig. 9 shows a simplified block diagram of a device suitable for implementing an example embodiment of the present disclosure; and

[0022] Fig.10 A block diagram of an example computer-readable medium is shown according to some example embodiments of the present disclosure.

[0023] Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. DETAILED DESCRIPTION

[0024] The principles of the present disclosure will now be described with reference to some example embodiments. It should be understood that these embodiments are described only for illustrative purposes and are helpful for those skilled in the art to understand and implement the present disclosure without implying any limitation on the scope of the present disclosure. The embodiments described herein can be implemented in various ways except for the ways described below.

[0025] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0026] References in this disclosure to "one embodiment," "an embodiment," "example embodiment," etc. indicate that the embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes the particular feature, structure, or characteristic. In addition, these phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it should be considered that it is within the knowledge of those skilled in the art to affect such feature, structure, or characteristic in conjunction with other embodiments, whether or not explicitly described.

[0027] It should be understood that although the terms "first" and "second" etc. can be used in this article to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first element can be referred to as the second element, and similarly, the second element can be referred to as the first element without departing from the scope of the exemplary embodiments. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0028] As used herein, “at least one of: ” and “at least one of ” and similar expressions, where a list of two or more elements is connected by “and” or “or”, mean at least any one element, or at least any two or more elements, or at least all the elements.

[0029] As used herein, unless explicitly stated, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs, and one or more intermediate steps may be included.

[0030] The terms used herein are used only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments. As used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprises", "comprising", "has", "having", "includes", and / or "including", when used herein, specify the presence of the features, elements, and / or components, etc., but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0031] As used in this application, the term "circuitry" may refer to one or more or all of the following:

[0032] (a) hardware circuit implementation only (e.g., implementation only in analog and / or digital circuitry) and

[0033] (b) a combination of hardware circuitry and software such as (where applicable):

[0034] (i) a combination of analog and / or digital hardware circuits and software / firmware and

[0035] (ii) any portion of hardware processor(s) with software (including digital signal processor(s), software and memory(s) that work together to enable a device (such as a mobile phone or server) to perform various functions and

[0036] (c) Hardware circuits and / or processor(s), such as microprocessor(s) or portions of microprocessor(s), that require software (e.g., firmware) to operate, but the software may not be present when the software is not required for operation.

[0037] This definition of circuitry applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term "circuitry" also covers an implementation of only a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term "circuitry" also covers, for example, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in a server, cellular network device, or other computing or network device, if applicable to the particular claim element.

[0038] As used herein, the term "communication network" refers to a network that complies with any appropriate communication standard, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High Speed ​​Packet Access (HSPA), Narrowband Internet of Things (NB-IoT), etc. In addition, the communication between the terminal device and the network device in the communication network can be performed according to any appropriate generation communication protocol, including but not limited to the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocol, and / or any other protocol currently known or developed in the future. The embodiments of the present disclosure can be applied to various communication systems. In view of the rapid development of communication, there will certainly be future types of communication technologies and systems, using which the present disclosure can be embodied. This should not be regarded as limiting the scope of the present disclosure to the above-mentioned systems.

[0039] As used herein, the term "network device" refers to a node in a communication network, via which a terminal device accesses the network and receives services therefrom. A network device may refer to a base station (BS) or an access point (AP), for example, a NodeB (NodeB or NB), an evolved NodeB (eNodeB or eNB), an NR NB (also referred to as a gNB), a remote radio unit (RRU), a radio head (RH), a remote radio head (RRH), a relay, a low-power node (such as a femto and pico, etc.), a non-terrestrial network (NTN) or a non-terrestrial network device (such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous orbit (GEO) satellite, an aircraft network device, etc., depending on the terminology and technology applied. In some example embodiments, a radio access network (RAN) separation architecture includes a centralized unit (CU) and a distributed unit (DU) at an IAB donor node. An IAB node includes a mobile terminal (IAB-MT) portion that behaves like a UE toward a parent node, and the DU portion of the IAB node behaves like a base station toward a next-hop IAB node.

[0040] The term "terminal device" refers to any terminal device that may be capable of wireless communication. As an example and not limitation, a terminal device may also be referred to as a communication device, a user equipment (UE), a subscriber station (SS), a portable user station, a mobile station (MS), or an access terminal (AT). The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet computer, a wearable terminal device, a personal digital assistant (PDA), a portable computer, a desktop computer, an image capture terminal device (such as a digital camera), a game terminal device, a music storage and playback device, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, a laptop embedded device (LEE), a laptop mounted device (LME), a USB dongle, a smart device, a wireless client device (CPE), an Internet of Things (IoT) device, a watch or other wearable device, a head mounted display (HMD), a vehicle, a drone, medical equipment and applications (such as remote surgery), industrial equipment and applications (such as robots and / or other wireless devices operating in the context of industrial and / or automated processing chains), consumer electronic devices, equipment operating on commercial and / or industrial wireless networks, etc. The terminal device may also correspond to the mobile terminal (MT) part of an IAB node (eg, a relay node).In the following description, the terms "terminal device", "communication device", "terminal", "user equipment" and "UE" may be used interchangeably.

[0041] As used herein, the terms "resource", "transmission resource", "resource block", "physical resource block" (PRB), "uplink resource" or "downlink resource" may refer to any resource used to perform communication (e.g., communication between a terminal device and a network device), such as time domain resources, frequency domain resources, space domain resources, code domain resources, or any other resource for enabling communication. In the following, unless explicitly stated, resources in both the frequency domain and the time domain will be used as examples of transmission resources to describe some example embodiments of the present disclosure. It should be noted that the example embodiments of the present disclosure are also applicable to other resources in other domains.

[0042] As described above, there is a need to enhance communication operations. For example, uplink (UL) and downlink (DL) demodulation reference signal (DMRS) operations are enhanced. According to some solutions, a larger number of DMRS ports for downlink and uplink MIMO are proposed. For example, it can be up to 24 orthogonal DMRS ports, where for each applicable DMRS type, the maximum number of orthogonal ports for both single-symbol and dual-symbol DMRS is doubled.

[0043] The distribution of resource elements used for DMRS within or across time slots may be referred to as a DMRS pattern. For example, a DMRS pattern may specify the number of total resource elements used to carry DMRS for transmission on multiple antenna ports in each physical resource block (PRB). A DMRS pattern may have a maximum number of DMRS antenna ports that may be supported. In the present disclosure, the terms "DMRS pattern" and "DMRS type" may be used interchangeably. In order to support a large number of DMRS ports up to 24, a new enhanced DMRS pattern needs to be supported. In order to support more orthogonal DMRS ports, an enhanced DMRS pattern may have a resource element (RE) pattern different from the RE pattern of a normal DMRS, which only supports up to 8 or 12 DMRS ports. Due to the support of a large number of DMRS antenna ports, at the expense of performance, when the number of DMRS antenna ports does not exceed the support for the normal DM-RS pattern, the UE may not need to be scheduled using an enhanced DMRS pattern. This means that the UE may support both normal DM-RS and enhanced DMRS RE patterns in different time slots according to the use case. However, according to some solutions, the DMRS configuration is radio resource control (RRC) configured, and switching between DMRS RE patterns on a slot-by-slot basis is not supported. Therefore, a solution for supporting different DMRS patterns for terminal devices is required.

[0044] Example Environment

[0045] Figure 1 An example communication environment 100 is shown in which example embodiments of the present disclosure may be implemented. In the communication environment 100, a plurality of communication devices, including a first device 110 and a second device 120, may communicate with each other.

[0046] exist Figure 1 In the example of , the first device 110 may include a terminal device, and the second device 120 may include a network device serving the terminal device. The service area of ​​the second device 120 may be referred to as a cell 102.

[0047] It should be understood that Figure 1The number of devices and their connections shown in are for illustrative purposes only and do not imply any limitation. The communication environment 100 may include any appropriate number of devices configured to implement the example embodiments of the present disclosure. Although not shown, it will be understood that one or more additional devices may be located in the cell 102, and one or more additional units may be deployed in the communication environment 100. It should be noted that, although illustrated as a network device, the second device 120 may be a device other than a network device. Although illustrated as a terminal device, the first device 110 may be a device other than a terminal device.

[0048] Hereinafter, for the purpose of illustration, some example embodiments are described in which the first device 110 operates as a terminal device and the second device 120 operates as a network device. However, in some example embodiments, the operations related to the terminal device may be implemented at a network device or other devices, and the operations related to the network device may be implemented at a terminal device or other devices.

[0049] In some example embodiments, if first device 110 is a terminal device and second device 120 is a network device, the link from second device 120 to first device 110 is referred to as a downlink (DL), and the link from first device 110 to second device 120 is referred to as an uplink (UL). In DL, second device 120 is a transmitting (TX) device (or transmitter) and first device 110 is a receiving (RX) device (or receiver). In UL, first device 110 is a TX device (or transmitter) and second device 120 is an RX device (or receiver).

[0050] The communication in the communication environment 100 can be implemented according to any appropriate communication protocol, including but not limited to cellular communication protocols such as the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G), and the sixth generation (6G), wireless local area network communication protocols (such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11, etc.), and / or any other protocols currently known or to be developed in the future. In addition, the communication can utilize any appropriate wireless communication technology, including but not limited to: code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), frequency division duplex (FDD), time division duplex (TDD), multiple input multiple output (MIMO), orthogonal frequency division multiple access (OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), and / or any other technology currently known or to be developed in the future.

[0051] Working principles and example signaling for communication

[0052] According to some example embodiments of the present disclosure, a solution for configuring multiple DMRS patterns is provided. In this solution, a first device receives a configuration associated with multiple DMRS patterns from a second device. The first device determines a DMRS pattern from multiple DMRS patterns based at least in part on the configuration. In this way, the DMRS pattern can be dynamically indicated and switched, thereby improving communication performance.

[0053] Reference now Figure 2 , Figure 2 A signaling diagram 200 for communication according to some example embodiments of the present disclosure is shown. Figure 2 As shown, the signaling diagram 200 involves a first device 110 and a second device 120. For the purpose of discussion, reference will be made to Figure 1 To describe the signaling diagram 200. Although a first device 110 and a second device 120 are Figure 2 , but it will be understood that there may be multiple first devices performing similar operations as described below with respect to the first device 110, and there may be multiple second devices performing similar operations as described below with respect to the second device 120.

[0054] In some example embodiments, the first device 110 may send 2010 capability information to the second device 120. In some example embodiments, the capability information may indicate one or more DMRS patterns that may be supported by the first device 110. For example, the capability information may indicate that the DMRS pattern supported by the first device 110 may specify a total of 12 resource elements per PRB for carrying DMRS, with a maximum number of antenna ports of 12. Alternatively, the capability information may indicate that the DMRS pattern supported by the first device 110 may specify a total of 24 resource elements per PRB for carrying DMRS, with a maximum number of antenna ports of 24. In some example embodiments, the DMRS pattern may be used for DL ​​PDSCH reception. Alternatively, or in addition, the DMRS pattern may be used for UL PUSCH transmission.

[0055] In some example embodiments, the capability information may indicate that the first device 110 may support 8 DMRS ports and 16 DMRS ports for DMRS type 1 and 12 DMRS ports and 24 DMRS ports for DMRS type 2. DMRS type 1 may correspond to each other resource element in the frequency occupied by a DMRS symbol. DMRS type 2 may correspond to two consecutive resource elements occupied by a DM-RS symbol in each group of six resource elements. As another example, the capability information may indicate that the first device 110 may support 8 DMRS ports for DMRS type 1 and 12 DMRS ports for DMRS type 2. The second device 120 may determine 2020 one or more DMRS patterns supported by the first device 110 based on the capability information.

[0056] The second device 120 sends 2030 a configuration associated with a plurality of DRMS ​​patterns. In some example embodiments, the configuration may include a TDRA table including a plurality of time domain resource allocation (TDRA) entries. In this case, in some example embodiments, the TDRA entry may include an indication of a DMRS pattern. In other words, the TDRA entry may indicate which DMRS pattern is applied. In some example embodiments, the TDRA table may be configured for DL. Additionally or alternatively, the TDRA table may be configured for UL.

[0057] Alternatively, the configuration may indicate a first mapping between a plurality of DMRS patterns and a set of search spaces. For example, the first mapping may indicate that the first search space is associated with the first DMRS pattern, and the second search space is associated with the second DMRS pattern. In other words, the first mapping may indicate that a certain search space is associated with a certain DMRS pattern. The term "search space" used herein may refer to an area in a downlink resource grid where a physical downlink control channel (PDCCH) may be carried. In some example embodiments, the search space set may include a common search space (CSS). For example, the search space set may include one or more of: Type-0 PDCCH CSS, Type0A-PDCCH CSS, Type1-PDCCH CSS, Type2-PDCCH CSS, or Type3-PDCCH CSS. Alternatively, the search space set may include a UE-specific search space. In some example embodiments, the first mapping may be used for DL ​​reception. Additionally or alternatively, the first mapping may be used for UL transmission. In some other example embodiments, the first mapping may be used for DL ​​and UL.

[0058] In some other embodiments, the configuration may indicate a second mapping between multiple DMRS patterns and a set of DCI formats. For example, the second mapping may indicate that the first search space is associated with the first DMRS pattern, and the second search space is associated with the second DMRS pattern. In other words, the second mapping may indicate that a certain DCI format is associated with a certain DMRS. The term "DCI format" used herein may refer to a predefined format in which downlink control information is packaged / formed and sent in a PDCCH. For example, a DCI format set may include one or more of the following: DCI_format 0, DCI_format 1, or DCI_format 2.

[0059] The second device 120 may send 2040 an indication indicating the time domain resource allocation entry to the first device 110. For example, the indication may be sent via downlink control information. In some other example embodiments, the indication may be sent via a medium access control (MAC) control element (CE).

[0060] The first device 110 determines 2050 the DMRS pattern from the plurality of DMRS patterns based at least in part on the configuration. In some example embodiments, the first device 110 may determine the TDRA entry based on the indication. In this case, the TDRA entry may indicate the DMRS pattern, and the first device 110 may determine the DMRS pattern based on the TDRA entry. For example only, if the TDRA entry indicates 12 DMRS ports for DMRS type 2, the first device 110 may determine the DMRS pattern to be 12 DMRS ports for DMRS type 2.

[0061] Alternatively, the first device 110 may determine a search space on which a physical downlink control channel (PDCCH) is detected. In this case, the first device 110 may determine a TDRA pattern based on the search space and the first mapping. As an example only, the first mapping may indicate that a Type-0 PDCCH CSS is associated with 8 DMRS ports for DMRS type 1, and a Type0A-PDCCH CSS is associated with 12 DMRS ports for DMRS type 2. In this case, if the first device 110 detects a channel in the Type-0 PDCCH CSS, the first device 110 may determine the DMRS pattern to be 8 DMRS ports for DMRS type 1.

[0062] In some other example embodiments, the first device 110 may determine a search space on which the PDCCH is detected, and determine a TDRA entry based on the search space. In this case, the first device 110 may determine a DMRS pattern indicated in the TDRA entry. For example, a PDCCH scheduled in the search space may be associated with one or more TDRA entries configured with a DMRS pattern.

[0063] In some example embodiments, the first device 110 may determine a DCI format associated with the channel. In this case, the first device 110 may determine the DMRS pattern based on the DCI format and the second mapping. By way of example only, the second mapping may indicate that DCI_format 0 is associated with 8 DMRS ports for DMRS type 1, while DCI_FORMAT 1 is associated with 12 DMRS ports for DMRS type 2. In this case, if the first device 110 detects DCI_format 0, the first device 110 may determine the DMRS pattern to be 8 DMRS ports for DMRS type 1.

[0064] In some example embodiments, first device 110 may perform DL PDSCH reception based on the DMRS pattern.Alternatively or additionally, first device 110 may perform UL PUSCH transmission based on the DMRS pattern.

[0065] According to an exemplary embodiment of the present disclosure, both normal DMRS and enhanced DMRS can be supported for a terminal device according to scheduling conditions. In this way, a DMRS pattern can be dynamically indicated and switched, thereby improving communication performance.

[0066] Some example embodiments of the present disclosure will be referred to below Figures 3 to 6 Described in detail.

[0067] Figure 3 300 is shown for communication according to some example embodiments of the present disclosure. Figure 3 As shown, the signaling diagram 300 involves the first device 110 and the second device 120 .

[0068] The second device 120 may send 3010 a TDRA table including TDRA entries to the first device 110. In some example embodiments, the TDRA table may be configured for DL. Alternatively or additionally, the TDRA table may be configured for UL. For example, in order to schedule PDSCH or PUSCH, the first device 110 may be configured with a TDRA table. In some example embodiments, each TDRA entry in the TDRA table may indicate an offset k0, a mapping type, and a start symbol and length (SLIV).

[0069] In some example embodiments, in order to support different DMRS patterns, the first device 110 may be configured with a PDSCH / PUSCH-TDRA table with additional parameters of the DMRS pattern. The first device 110 may be configured with a TDRA entry with or without DMRS type information. When multiple DMRS patterns are supported, DM-RStype-r18 may have multiple options. Table 1 below shows examples of TDRA entries according to some example embodiments of the present disclosure. It should be noted that Table 1 is for example only and not for limitation.

[0070] Table 1

[0071]

[0072] In some example embodiments, a Rel-18 DM-RS pattern associated with two DM-RS types (type 1 or type 2) may be defined. Alternatively, a new Rel-18 DM-RS may be defined that is independent of the normal DM-RS type. In some example embodiments, the maximum number of enhanced DMRS ports may be double the ports: for DMRS type 1, the maximum number of enhanced DMRS ports for PDSCH / PUSCH may be a single-symbol DMRS with 8 DMRS ports and a dual-symbol DMRS with 16 DMRS ports; for DMRS type 2, the maximum number of enhanced DMRS ports for PDSCH / PUSCH may be a single-symbol DMRS with 12 DMRS ports and a dual-symbol DMRS with 24 DMRS ports.

[0073] Alternatively, the DMRS type associated with the mapping type (type A or type B) may be retained in the TDRA entry. Table 2 below shows an example of a TDRA entry according to some example embodiments of the present disclosure. It should be noted that Table 2 is only an example and not a limitation.

[0074] Table 2

[0075]

[0076] In some other example embodiments, if independent mapping of DM-RS patterns is used regardless of the mapping type, DM-RStype-r18 can be configured to select an option. (Where type 3 or type 4 is a new DMRS pattern). Table 3 below shows examples of TDRA entries according to some example embodiments of the present disclosure. It should be noted that Table 3 is merely an example and not a limitation.

[0077] Table 3

[0078]

[0079]

[0080] The second device 120 may send 3020 an indication indicating a time domain resource allocation entry to the first device 110. In some example embodiments, the indication may be sent via downlink control information. For example, the second device 120 may schedule via a TDRA entry in a DCI and TDRA table. In some other example embodiments, the indication may be sent via a media access control (MAC) control element (CE).

[0081] The first device 110 may determine 3030 a TDRA entry based on the DCI. As an example only, if the TDRA table includes 8 TDRA entries, the DCI may include a 3-bit indication indicating the TDRA entry.

[0082] The first device 110 may determine 3040 a DMRS pattern based on the TDRA entry. For example, the first device 110 may determine the DMRS pattern indicated in the TDRA entry.

[0083] According to reference Figure 3 The described exemplary embodiments make it simple and easy for a terminal device to support both normal DMRS and enhanced DMRS according to scheduling conditions. In this way, the DMRS pattern can be dynamically indicated and switched, thereby improving communication performance.

[0084] Figure 4 4 shows a signaling diagram 400 for communication according to some example embodiments of the present disclosure. Figure 4 As shown, the signaling diagram 400 involves a first device 110 and a second device 120 .

[0085] The second device 120 may send 4010 to the first device 110 a configuration including a first mapping between a plurality of DMRS patterns and a set of search spaces. In some example embodiments, the configuration may be a search space configuration. For example, the first mapping may indicate that the first search space is associated with the first DMRS pattern, and the second search space is associated with the second DMRS pattern. In other words, the first mapping may indicate that a certain search space is associated with a certain DMRS pattern.

[0086] The first device 110 may detect 4020 the PDCCH in one or more search spaces. In some example embodiments, the search space set may include a common search space (CSS). Alternatively, the search space set may include a UE-specific search space. In some example embodiments, the first mapping may be configured for DL. Alternatively or additionally, the first mapping may be configured for UL. In some other example embodiments, the first mapping may be configured for DL ​​and UL.

[0087] The second device 120 may send 4030 a DCI on the PDCCH to the first device 110. The first device 110 may determine 4040 a search space detected on the PDCCH. In this case, the first device 110 may determine 4050 a DMRS pattern based on the search space. For example, assuming that for a normal DM-RS, 4 TDRA entries are used, two search spaces may be supported, and for a PDCCH in a normal search space, 4 TDRA entries may be used, and a 2-bit DCI indication may be used.

[0088] According to reference Figure 4 In the described example embodiment, if the DMRS pattern is associated with a PDSCH scheduled by a PDCCH in the search space, the first device can have an assumption of DMRS when detecting the PDCCH. In this way, it does not increase the number of bits in the DCI and reduces the delay caused by decoding the DCI. In addition, the relevant processing can be prepared even before the DCI detection.

[0089] Figure 5 5 shows a signaling diagram 500 for communication according to some example embodiments of the present disclosure. Figure 5 As shown, the signaling diagram 500 involves a first device 110 and a second device 120 .

[0090] The second device 120 may send 5010 a TDRA table including TDRA entries to the first device 110. In some example embodiments, the TDRA table may be configured for DL. Alternatively or additionally, the TDRA table may be configured for UL. For example, in order to schedule PDSCH or PUSCH, the first device 110 may be configured with a TDRA table. In some example embodiments, each TDRA entry in the TDRA table may indicate an offset k0, a mapping type, and a start symbol and length (SLIV).

[0091] In some example embodiments, to support different DMRS patterns, first device 110 may be configured with a PDSCH / PUSCH-TDRA table with additional parameters of the DMRS pattern.First device 110 may be configured with a TDRA entry with or without DMRS type information.

[0092] The first device 110 may detect 5020 the PDCCH in one or more search spaces. In some example embodiments, the search space set may include a common search space (CSS). Alternatively, the search space set may include a UE-specific search space. In some example embodiments, the first mapping may be configured for DL. Alternatively or additionally, the first mapping may be configured for UL. In some other example embodiments, the first mapping may be configured for DL ​​and UL.

[0093] The second device 120 may send 5030DCI on the PDCCH to the first device 110. The first device 110 may determine 5040 the search space in which the PDCCH is detected. The first device 110 may determine 5050 the TDRA entry based on the search space. In other words, if the first device 110 is configured with an enhanced DMRS, the PDCCH scheduled in the search space may have a new TDRA table in which one or more TDRA entries are configured with an enhanced DMRS. In this case, the first device 110 may determine 5060 the DMRS pattern based on the TDRA entry. For example, the PDCCH scheduled in the search space may be associated with one or more TDRA entries configured with a DMRS pattern. For example, assuming that for a normal DM-RS, 4 TDRA entries are used, two search spaces may be supported, the normal search space may use 2 bits for DCI indication, and 2-3 bits may be used for the search space configured with an enhanced DMRS.

[0094] According to reference Figure 5 The exemplary embodiments described above can reduce the number of search spaces required for scheduling different DMRS patterns. In addition, the number of TDRA entries can be optimized without increasing the DCI indication bits.

[0095] Figure 6 600 is shown for communication according to some example embodiments of the present disclosure. Figure 6 As shown, the signaling diagram 600 involves a first device 110 and a second device 120 .

[0096] The second device 120 may send 6010 a configuration indicating a second mapping between a plurality of DMRS patterns and a set of DCI formats. For example, the second mapping may indicate that a first search space is associated with a first DMRS pattern, and a second search space is associated with a second DMRS pattern. In other words, the second mapping may indicate that a certain DCI format is associated with a certain DMRS.

[0097] The first device 110 may detect 6020 the PDCCH in one or more search spaces. In some example embodiments, a set of search spaces may include a common search space (CSS). Alternatively, a set of search spaces may include a UE-specific search space.

[0098] The second device 120 may send 6030 a DCI on a PDCCH to the first device 110. The first device 110 may determine 6040 a DCI format based on the DCI. In this case, the first device 110 may determine 6050 a DMRS pattern based on the DCI format and the second mapping. As an example only, the second mapping may indicate that DCI_format 0 is associated with 8 DMRS ports for DMRS type 1, while DCI_FORMAT 1 is associated with 12 DMRS ports for DMRS type 2. In this case, if the first device 110 detects DCI_format 0, the first device 110 may determine the DMRS pattern to be 8 DMRS ports for DMRS type 1.

[0099] According to reference Figure 6 An example embodiment is described which does not increase the number of bits in the DCI and reduces the delay caused by decoding the DCI. In addition, even the correlation process can be prepared before the DCI detection.

[0100] Example Method

[0101] Figure 7 A flowchart of an example method 700 implemented at a first device according to some example embodiments of the present disclosure is shown. For the purpose of discussion, the method 700 will be described from Figure 1 The angle of the first device 110 is described.

[0102] At block 710, the first device receives a configuration associated with a plurality of demodulation reference signal patterns from a second device. In some example embodiments, the configuration may include a time domain resource allocation table including a plurality of time domain resource allocation entries. In some example embodiments, at least one time domain resource allocation entry in the time domain resource allocation table may include an indication of a demodulation reference signal pattern. In some example embodiments, the time domain resource allocation table may be configured for downlink reception or uplink transmission.

[0103] Alternatively, the configuration may indicate a first mapping between a plurality of demodulation reference signal patterns and a set of search spaces.In some example embodiments, the configuration may indicate a second mapping between a plurality of demodulation reference signal patterns and a set of downlink control information formats.

[0104] In some example embodiments, the first device may receive an indication indicating a TDRA entry from the second device. For example, the indication may be sent via downlink control information. In some other example embodiments, the indication may be sent via a media access control (MAC) control element (CE).

[0105] At block 730, the first device determines a demodulation reference signal pattern to be used from a plurality of demodulation reference signal patterns based at least in part on the configuration. In some example embodiments, the first device may determine a time domain resource allocation entry based on downlink control information. In this case, the first device may determine the demodulation reference signal pattern indicated in the time domain resource allocation entry as the demodulation reference signal pattern.

[0106] In some example embodiments, the first device may determine a search space on which the PDCCH is detected. In this case, the first device may determine a demodulation reference signal pattern based on the search space and the first mapping. In some example embodiments, the first mapping may be configured as at least one of: downlink reception or uplink transmission.

[0107] Alternatively, the first device may determine a search space on which the PDCCH is detected. The first device may also determine a time domain resource allocation entry based on the search space. In this case, the first device may determine a demodulation reference signal pattern indicated in the time domain resource allocation entry.

[0108] In some other example embodiments, the first device may determine a downlink control information format associated with the channel. In this case, the first device may determine a demodulation reference signal pattern based on the downlink control information format and the second mapping.

[0109] In some example embodiments, the first device may perform at least one of: transmitting or receiving with the second device based on the demodulation reference signal pattern.

[0110] Figure 8 A flowchart of an example method 800 implemented at a second device according to some example embodiments of the present disclosure is shown. For the purpose of discussion, the method 800 will be described from Figure 1 The angle of the second device 120 is described.

[0111] At block 810, the second device sends a configuration associated with a plurality of demodulation reference signal patterns to the first device. In some example embodiments, the configuration may include a time domain resource allocation table, the time domain resource allocation table including a plurality of time domain resource allocation entries. In some example embodiments, at least one time domain resource allocation entry in the time domain resource allocation table may include an indication of the demodulation reference signal pattern. In some example embodiments, the time domain resource allocation table may be configured for downlink reception or uplink transmission.

[0112] Alternatively, the configuration may indicate a first mapping between a plurality of demodulation reference signal patterns and a set of search spaces.In some example embodiments, the configuration may indicate a second mapping between a plurality of demodulation reference signal patterns and a set of downlink control information formats.

[0113] In some example embodiments, at block 820, the second device may send information to the first device on a channel between the first device and the second device. The information is used to determine a demodulation reference signal pattern from a plurality of demodulation reference signal patterns. For example, the second device may send an indication indicating a TDRA entry to the first device. In some example embodiments, the indication may be sent via downlink control information. In some other example embodiments, the indication may be sent via a media access control (MAC) control element (CE).

[0114] Example devices, equipment, and media

[0115] In some example embodiments, a first device (eg, Figure 1 The first device 110 in the embodiment may include a component for performing the corresponding operation of the method 700. The component may be implemented in any suitable form. For example, the component may be implemented in a circuit system or a software module. The first device may be implemented as Figure 1 The first device 110 or is included in Figure 1 In the first device 110.

[0116] In some example embodiments, the first apparatus includes means for receiving a configuration associated with a plurality of demodulation reference signal patterns from a network device; and means for determining a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns based at least in part on the configuration.

[0117] In some example embodiments, the means for receiving the configuration includes means for receiving a time domain resource allocation table including a plurality of time domain resource allocation entries from a network device, wherein at least one time domain resource allocation entry in the time domain resource allocation table includes information related to a demodulation reference signal pattern in a plurality of demodulation reference signal patterns.

[0118] In some example embodiments, the first apparatus comprises means for receiving an indication indicating a time domain resource allocation entry from a network device via downlink control information or a medium access control control element.

[0119] In some example embodiments, means for determining a demodulation reference signal pattern comprises means for determining, at least in part, a demodulation reference signal pattern to be used based on the indicated time domain resource allocation entry.

[0120] In some example embodiments, the time domain resource allocation table is used for at least one of: downlink reception or uplink transmission.

[0121] In some example embodiments, means for receiving a configuration includes means for receiving a configuration from a network device indicating a first mapping between a plurality of demodulation reference signal patterns and a set of search spaces.

[0122] In some example embodiments, means for determining a demodulation reference signal pattern includes means for determining a search space over which a physical downlink control channel is detected; and means for determining the demodulation reference signal pattern based on the search space and the first mapping.

[0123] In some example embodiments, the first mapping is for at least one of: downlink reception or uplink transmission.

[0124] In some example embodiments, means for determining a demodulation reference signal pattern includes means for determining a search space on which a physical downlink control channel is detected; means for determining a time domain resource allocation entry based on the search space; and means for determining a demodulation reference signal pattern based on the time domain resource allocation entry.

[0125] In some example embodiments, means for receiving a configuration from the second device includes means for receiving a configuration from a network device indicating a second mapping between a plurality of demodulation reference signal patterns and a set of downlink control information formats.

[0126] In some example embodiments, means for determining a demodulation reference signal pattern includes means for determining a downlink control information format; and means for determining the demodulation reference signal pattern based on the downlink control information format and the second mapping.

[0127] In some example embodiments, the first apparatus comprises means for performing at least one of: transmitting or receiving with the second device based on a target demodulation reference signal pattern.

[0128] In some example embodiments, the first device comprises a terminal device.

[0129] In some example embodiments, a second device (eg, Figure 1 The second device 120 in the embodiment may include a component for performing the corresponding operation of method 800. The component may be implemented in any suitable form. For example, the component may be implemented in a circuit system or a software module. The second device may be implemented as Figure 1 The second device 120 or included in Figure 1 In the second device 120 in.

[0130] In some example embodiments, the second apparatus comprises means for sending a configuration associated with a plurality of demodulation reference signal patterns to the terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

[0131] In some example embodiments, the component for transmission configuration includes: a component for sending a time domain resource allocation table including multiple time domain resource allocation entries to a terminal device, wherein at least one time domain resource allocation entry in the time domain resource allocation table includes information related to a demodulation reference signal pattern among multiple demodulation reference signal patterns.

[0132] In some example embodiments, the second apparatus comprises means for sending the time domain resource allocation entry to the terminal device via downlink control information or a medium access control control element.

[0133] In some example embodiments, the time domain resource allocation table is used for at least one of: downlink reception or uplink transmission.

[0134] In some example embodiments, the means for sending the configuration comprises means for sending a configuration indicating a first mapping between a plurality of demodulation reference signal patterns and a set of search spaces to a terminal device.

[0135] In some example embodiments, the first mapping is for at least one of: downlink reception or uplink transmission.

[0136] In some example embodiments, the means for sending the configuration comprises means for sending a configuration to the terminal device indicating a second mapping between a plurality of demodulation reference signal patterns and a set of downlink control information formats.

[0137] In some example embodiments, the apparatus comprises a network device.

[0138] Fig. 9 900 is a simplified block diagram of a device suitable for implementing an example embodiment of the present disclosure. The device 900 may be provided to implement a communication device, such as Figure 1The first device 110 or the second device 120 is shown. As shown in the figure, the device 900 includes one or more processors 910, one or more memories 920 coupled to the processor 910, and one or more communication modules 940 coupled to the processor 910.

[0139] The communication module 940 is used for two-way communication. The communication module 940 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interface may represent any interface necessary for communicating with other network elements. In some example embodiments, the communication module 940 may include at least one antenna.

[0140] Processor 910 may be of any type suitable for the local technology network, and may include, as non-limiting examples, one or more of: a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Device 900 may have multiple processors, such as application specific integrated circuit chips, which are time-slaved to a clock synchronized with a main processor.

[0141] The memory 920 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 924, electrically programmable read-only memory (EPROM), flash memory, hard disk, compact disk (CD), digital video disk (DVD), optical disk, laser disk, and other magnetic storage and / or optical storage. Examples of volatile memories include, but are not limited to, random access memory (RAM) 922 and other volatile memories that will not persist over the duration of a power outage.

[0142] The computer program 930 includes computer executable instructions executed by the associated processor 910. The instructions of the program 930 may include instructions for performing the operations / actions of some example embodiments of the present disclosure. The program 930 may be stored in a memory, such as ROM 924. The processor 910 may perform any suitable actions and processes by loading the program 930 into the RAM 922.

[0143] The exemplary embodiments of the present disclosure may be implemented by a program 930, so that the device 900 may perform any process of the present disclosure, such as referring to Figures 2 to 8 The exemplary embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0144] In some example embodiments, the program 930 may be tangibly embodied in a computer-readable medium that may be included in the device 900 (such as in the memory 920) or in other storage devices accessible by the device 900. The device 900 may load the program 930 from the computer-readable medium to the RAM 922 for execution. In some example embodiments, the computer-readable medium may include any type of non-transitory storage medium, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. As used herein, the term "non-transitory" is a limitation of the medium itself (i.e., tangible, not a signal), not a limitation on data storage persistence (e.g., RAM vs. ROM).

[0145] Fig.10 An example of a computer readable medium 1000 is shown, which may be in the form of a CD, DVD or other optical storage disk. Computer readable medium 1000 has a program 930 stored thereon.

[0146] In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flow charts, or using some other graphical representations, it should be understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0147] Some example embodiments of the present disclosure also provide at least one computer program product, which is tangibly stored on a computer-readable medium (such as a non-transient computer-readable medium). The computer program product includes computer executable instructions, such as those included in a program module, which are executed in a device on a target physical or virtual processor to perform any of the methods described above. Typically, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The functions of the program modules can be combined or split between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in both local and remote storage media.

[0148] The program code for executing the method of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or completely on a remote machine or server.

[0149] In the context of the present disclosure, computer program codes or related data may be carried by any suitable carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0150] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or apparatuses, or any suitable combination of the above. More specific examples of computer readable storage media would include an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0151] In addition, although the operations are described in a particular order, this should not be understood as requiring such operations to be performed in the particular order or sequence shown, or that all the operations shown are required to be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these details should not be interpreted as limitations on the scope of the present disclosure, but should be interpreted as descriptions of features that may be specific to a particular embodiment. Unless explicitly stated, certain features described in the context of separate embodiments may also be implemented in combination in a single embodiment. On the contrary, unless explicitly stated, the various features described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments.

[0152] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it should be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Instead, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A device, include: at least one processor; as well as at least one memory storing instructions, which, when executed by the at least one processor, cause the apparatus to at least perform: receiving, from a network device, a configuration associated with a plurality of demodulation reference signal patterns; as well as Based at least in part on the configuration, a demodulation reference signal pattern to be used is determined from among the plurality of demodulation reference signal patterns.

2. The apparatus according to claim 1, wherein receiving the configuration include: A time domain resource allocation table including a plurality of time domain resource allocation entries is received from the network device, wherein at least one time domain resource allocation entry in the time domain resource allocation table includes: information related to a demodulation reference signal pattern in the plurality of demodulation reference signal patterns.

3. The apparatus according to any one of claims 1 to 2, wherein the apparatus is further configured to perform: An indication indicating a time domain resource allocation entry is received from the network device via downlink control information or a medium access control control element.

4. The apparatus according to any one of claims 1 to 3, wherein the demodulation reference signal pattern is determined include: Based at least in part on the indicated time domain resource allocation entry, a demodulation reference signal pattern to be used is determined.

5. The apparatus according to any one of claims 1 to 4, wherein the time domain resource allocation table is used for at least one of the following items: downlink reception or uplink transmission.

6. The apparatus of claim 1, wherein receiving the configuration include: The configuration indicating a first mapping between the plurality of demodulation reference signal patterns and a set of search spaces is received from the network device.

7. The apparatus according to claim 1 or 6, wherein the demodulation reference signal pattern is determined include: determining a search space on which a physical downlink control channel is detected; as well as The demodulation reference signal pattern is determined based on the search space and the first mapping.

8. The apparatus of claim 6 or 7, wherein the first mapping is used for at least one of: downlink reception or uplink transmission.

9. The apparatus according to claim 1 or 2, wherein the demodulation reference signal pattern is determined include: determining a search space on which a physical downlink control channel is detected; Based on the search space, determining a time domain resource allocation entry; as well as The demodulation reference signal pattern is determined based on the time domain resource allocation entry.

10. The apparatus of claim 1, wherein receiving the configuration include: The configuration indicating a second mapping between the plurality of demodulation reference signal patterns and a set of downlink control information formats is received from the network device.

11. The apparatus according to any one of claims 1 or 10, wherein the demodulation reference signal pattern is determined include: determining a downlink control information format; as well as The demodulation reference signal pattern is determined based on the downlink control information format and the second mapping.

12. The apparatus according to any one of claims 1 to 11, wherein the apparatus is further configured to perform: Based on the demodulation reference signal pattern, at least one of the following items is performed: transmission or reception with the network device.

13. The apparatus according to any one of claims 1 to 12, wherein the apparatus comprises a terminal device.

14. A device, include: at least one processor; as well as at least one memory storing instructions, which, when executed by the at least one processor, cause the apparatus to at least perform: A configuration associated with a plurality of demodulation reference signal patterns is sent to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

15. The apparatus according to claim 14, wherein sending the configuration include: A time domain resource allocation table including a plurality of time domain resource allocation entries is sent to the terminal device, wherein at least one time domain resource allocation entry in the time domain resource allocation table includes information related to a demodulation reference signal pattern in the plurality of demodulation reference signal patterns.

16. The apparatus according to claim 14 or 15, wherein the apparatus is further configured to perform: The time domain resource allocation entry is sent to the terminal device via downlink control information or a medium access control control element.

17. The apparatus according to claim 15 or 16, wherein the time domain resource allocation table is used for at least one of the following items: downlink reception or uplink transmission.

18. The apparatus according to claim 14, wherein sending the configuration include: The configuration indicating a first mapping between the plurality of demodulation reference signal patterns and a set of search spaces is sent to the terminal device.

19. The apparatus of claim 18, wherein the first mapping is used for at least one of: downlink reception or uplink transmission.

20. The apparatus of claim 14, wherein sending the configuration include: The configuration indicating a second mapping between the plurality of demodulation reference signal patterns and a set of downlink control information formats is sent to the terminal device.

21. An apparatus according to any one of claims 14 to 20, wherein the apparatus comprises a network device.

22. A method, include: receiving, at a terminal device and from a network device, a configuration associated with a plurality of demodulation reference signal patterns; as well as Based at least in part on the configuration, a demodulation reference signal pattern to be used is determined from among the plurality of demodulation reference signal patterns.

23. A method, include: A configuration associated with a plurality of demodulation reference signal patterns is sent at a network device and to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

24. A computer-readable medium comprising instructions, which, when executed by a device, cause the device to at least perform the following: receiving, from a network device, a configuration associated with a plurality of demodulation reference signal patterns; and Based at least in part on the configuration, a demodulation reference signal pattern to be used is determined from among the plurality of demodulation reference signal patterns.

25. A computer-readable medium comprising instructions, which, when executed by a device, cause the device to at least perform the following: A configuration associated with a plurality of demodulation reference signal patterns is sent to a terminal device, the configuration being used to determine a demodulation reference signal pattern to be used from the plurality of demodulation reference signal patterns.

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