CN116097814A

CN116097814A - Wireless communication method and communication device

Info

Publication number: CN116097814A
Application number: CN202080103952.XA
Authority: CN
Inventors: 吴作敏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2023-05-09
Also published as: WO2022087970A1

Abstract

The embodiment of the application provides a wireless communication method and communication equipment, and provides a DMRS pattern meeting the high-frequency communication requirement, which can improve the performance of DMRS channel estimation under the condition of high-frequency large subcarrier spacing, thereby improving the system performance. The method of wireless communication includes: the communication equipment transmits or receives the DMRS according to the DMRS pattern; wherein, REs performing OCC combining within CDM group in the DMRS pattern satisfy one of the following: REs performing OCC combining within the CDM group are located on consecutive subcarriers of one symbol; RE for executing OCC combination in the CDM group is positioned on continuous subcarriers of M symbols, M is a positive integer, and M is more than or equal to 2; RE performing OCC combining in the CDM group is located on the same subcarrier of M symbols, M is a positive integer, and M is more than or equal to 2.

Description

Wireless communication method and communication device

Technical Field

Embodiments of the present application relate to the field of communications, and more particularly, to a method and a communication device for wireless communication.

Background

To further increase the system throughput, cellular mobile communication systems are expanding towards higher frequency spectrums, e.g. above 52.6GHz, with the consequent introduction of larger system bandwidths and subcarrier spacings, e.g. subcarrier spacings 480khz,960khz. In this case, a higher requirement is put on the demodulation reference signal (Demodulation Reference Signal, DMRS) pattern (pattern), and how to design the DMRS pattern to meet the high-frequency communication requirement is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and communication equipment, and provides a DMRS pattern meeting the high-frequency communication requirement, which can improve the performance of DMRS channel estimation under the condition of high-frequency large subcarrier spacing, thereby improving the system performance.

In a first aspect, a method of wireless communication is provided, the method comprising:

the communication equipment transmits or receives the DMRS according to the DMRS pattern;

wherein, REs performing OCC combining within CDM group in the DMRS pattern satisfy one of the following:

REs performing OCC combining within the CDM group are located on consecutive subcarriers of one symbol;

RE for executing OCC combination in the CDM group is positioned on continuous subcarriers of M symbols, M is a positive integer, and M is more than or equal to 2;

RE performing OCC combining in the CDM group is located on the same subcarrier of M symbols, M is a positive integer, and M is more than or equal to 2.

In a second aspect, a communication device is provided for performing the method of the first aspect described above.

Specifically, the communication device comprises functional modules for performing the method in the first aspect described above.

In a third aspect, an apparatus for wireless communication is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect.

In a fourth aspect, there is provided an apparatus for implementing the method of the first aspect.

Specifically, the device comprises: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method as in the first aspect described above.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect described above.

In a sixth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first aspect described above.

In a seventh aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

Through the above technical solution, REs for performing OCC combining in CDM group in DMRS pattern are located on consecutive subcarriers of one symbol; alternatively, REs performing OCC combining within a CDM group in the DMRS pattern are located on consecutive subcarriers of M symbols; alternatively, REs performing OCC combining within a CDM group in the DMRS pattern are located on the same subcarriers of M symbols. That is, the DMRS pattern satisfies the high frequency communication requirement, and improves the performance of DMRS channel estimation in the case of high frequency large subcarrier spacing, thereby improving the system performance.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture to which embodiments of the present application apply.

Fig. 2 is a schematic diagram of a DMRS pattern provided herein.

Fig. 3 is a schematic diagram of another DMRS pattern provided herein.

Fig. 4 is a schematic diagram of yet another DMRS pattern provided herein.

Fig. 5 is a schematic diagram of yet another DMRS pattern provided herein.

Fig. 6 is a schematic diagram of simulation results of a data block error rate provided in the present application.

Fig. 7 is a schematic flow chart diagram of a method of wireless communication provided in accordance with an embodiment of the present application.

Fig. 8 to 16 are schematic diagrams of DMRS patterns provided according to embodiments of the present application.

Fig. 17 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 18 is a schematic block diagram of another communication device provided in accordance with an embodiment of the present application.

Fig. 19 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 20 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope of the present application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio, NR system evolution system, LTE over unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR over unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., and the embodiments of the present application may also be applied to these communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) fabric scenario.

Optionally, the communication system in the embodiments of the present application may be applied to unlicensed spectrum, where unlicensed spectrum may also be considered as shared spectrum; alternatively, the communication system in the embodiments of the present application may also be applied to licensed spectrum, where licensed spectrum may also be considered as non-shared spectrum.

Embodiments of the present application describe various embodiments in connection with network devices and terminal devices, where a terminal device may also be referred to as a User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, user Equipment, or the like.

The terminal device may be a STATION (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) STATION, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In embodiments of the present application, the terminal device may be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In this embodiment of the present application, the network device may be a device for communicating with a mobile device, where the network device may be an Access Point (AP) in a WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or an Access Point, a vehicle device, a wearable device, a network device or a base station (gNB) in an NR network, a network device in a PLMN network of future evolution, or a network device in an NTN network, etc.

By way of example and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. Alternatively, the network device may be a base station disposed on land, in a water area, or the like.

In this embodiment of the present application, a network device may provide a service for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Fig. 1 illustrates one network device and two terminal devices by way of example, and alternatively, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The terminology used in the description section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

It should be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, or the like.

In the embodiment of the present application, the "predefining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the specific implementation of the present application is not limited. Such as predefined may refer to what is defined in the protocol.

In this embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

For better understanding of the embodiments of the present application, DMRS patterns related to the present application are described.

The 5G communication system supports two DMRS types (types), wherein DMRS of multiple ports in the same code division multiplexing (code division multiplexing, CDM) group (group) occupy the same time-frequency resource, and are distinguished by a frequency domain orthogonal cover code (Orthogonal cover code, OCC) mode or by a time domain+frequency domain OCC mode.

type-1 DMRS adopts the mode of comb structure +OCC, divides into 2 group resources on the frequency domain:

for a single symbol, a maximum of 4 ports can be supported, with each set of resources internally distinguished by a frequency domain OCC, as shown in fig. 2;

for dual symbols, a maximum of 8 ports can be supported, with each set of resources internally distinguished by a time-domain + frequency-domain OCC, as shown in fig. 3.

type-2 DMRS, in a manner of Frequency division multiplexing+occ, as shown in fig. 3, is divided into 3 groups of resources in a manner of Frequency division multiplexing (Frequency-division multiplexing, FDM) in a Frequency domain:

For a single symbol, a maximum of 6 ports can be supported, with each set of resources internally distinguished by a frequency domain OCC, as shown in fig. 4;

for dual symbols, a maximum of 12 ports can be supported, with each set of resources internally distinguished by a time-domain + frequency-domain OCC, as shown in fig. 5.

To further increase the system throughput, cellular mobile communication systems are expanding towards higher frequency spectrums, e.g. above 52.6GHz, with the consequent introduction of larger system bandwidths and subcarrier spacings, e.g. subcarrier spacings 480khz,960khz. This means that the frequency domain interval between each Resource Element (RE) is further extended. If the DMRS pattern shown in fig. 2 to 5 is continued, multiple REs for OCC combining in the same CDM group may have a relatively large difference due to exceeding the channel coherence bandwidth (for example, in the type-1 DMRS, the REs for OCC combining differ by two subcarrier intervals, assuming that the subcarrier interval is 960kHz, and the REs for OCC combining differ by 960×2=1920 kHz), which affects the accuracy of DMRS channel estimation, thereby degrading the system performance.

In addition, the present application provides a simulation result of a Block Error Rate (BLER), as shown in fig. 6, where the conditions corresponding to the simulation result of the data BLER include:

The center frequency point is 60GHz, the transmission layer number is 2, the channel is a tapped delay line A (tapped delay line, TDL-A), the Delay Spread (DS) =20 ns, the modulation coding scheme (Modulation and Coding Scheme, MCS) =16, the subcarrier spacing (Subcarrier spacing, SCS) respectively takes 240kHz and 460 kHz, and the DMRS types are type-1 DMRS and type-2 DMRS.

In fig. 6, the horizontal axis represents signal-to-noise ratio (signal noise ratio, SNR) in decibels (dB); the vertical axis is block error rate (BLER).

From the simulation results of the data BLER as shown in fig. 6, the following points can be seen:

if DMRS corresponding to the transmission of the multi-layer data is multiplexed in a CDM mode, compared with a small subcarrier spacing, a large subcarrier spacing has obvious performance loss;

the performance loss of a CDM DMRS is related to the DMRS pattern, and the closer the DMRS is positioned on the frequency domain, the better the performance is; in fig. 6, the type-1 DMRS-OCC-combined DMRS REs are separated by 2 subcarrier intervals in the frequency domain, and the type-2 DMRS-OCC-combined DMRS REs are separated by 1 subcarrier interval in the frequency domain, so that the performance loss of the type-2 DMRS is relatively smaller.

Based on the above-mentioned problems, the present application proposes a DMRS pattern capable of improving the performance of DMRS channel estimation in the case of high-frequency large subcarrier spacing, thereby improving the system performance.

The technical scheme of the present application is described in detail below through specific embodiments.

Fig. 7 is a schematic flow chart diagram of a method 200 of wireless communication according to an embodiment of the present application, as shown in fig. 7, the method 200 may include at least some of the following:

s210, the communication equipment transmits or receives the DMRS according to the DMRS pattern;

It should be noted that, the effect of performing OCC combining in CDM group is to remove interference between different transmission layers, so as to improve performance of channel estimation. In addition, REs performing OCC combining within the CDM group are DMRS REs.

That is, in the embodiment of the present application, the DMRS pattern is related to the time domain symbol. Specifically, when the number of symbols is small (for example, 1 symbol or 2 symbols), multiple REs for performing OCC combining in the CDM group may be concentrated in the frequency domain as much as possible, and multiplexed by using the frequency domain OCC method or multiplexed by using the frequency domain+time domain OCC combining method; when the number of DMRS symbols is large (e.g., 2 symbols, or 4 symbols), multiple REs for performing OCC combining in the CDM group may be placed on multiple continuous or discontinuous symbols on the same subcarrier, and multiplexed in a time domain OCC manner.

It should be noted that, in the embodiment of the present application, the OCC combining can be performed in the time domain, mainly considering that most of high-frequency communication is used in the indoor high-throughput hot spot scenario, the moving speed of the user is relatively slow, and the channel variation in the time domain is small.

In the embodiment of the application, the DMRS pattern makes DMRS REs performing OCC combining in the same CDM group as close as possible to each other in frequency domain position so as to reduce performance loss of channel estimation and support higher system throughput.

In the embodiment of the application, the communication device may be a terminal device or a network device. Of course, some other device is also possible, which is not limited in this application.

For example, the network device transmits DMRS according to the DMRS pattern. In this case, the terminal device may receive the DMRS according to the DMRS pattern.

For another example, the network device receives the DMRS according to the DMRS pattern. In this case, the terminal device may transmit the DMRS according to the DMRS pattern.

For another example, network device a transmits DMRS according to the DMRS pattern. In this case, the network device B may receive the DMRS according to the DMRS pattern.

For another example, network device a receives the DMRS according to the DMRS pattern. In this case, the network device B may transmit the DMRS according to the DMRS pattern.

For another example, terminal device a transmits DMRS according to the DMRS pattern. In this case, the terminal device B may receive the DMRS according to the DMRS pattern.

For another example, terminal device a receives the DMRS according to the DMRS pattern. In this case, the terminal device B may transmit the DMRS according to the DMRS pattern.

That is, in the embodiment of the present application, the DMRS pattern may be applied to uplink and downlink communications, and may also be applied to D2D, V X, side-link, and so on communications. Of course, the present invention is also applicable to some other communication, such as NTN, which is not limited in this application.

In some embodiments, S210 may also be expressed as:

the communication device maps or de-maps DMRSs according to the DMRS pattern.

Optionally, in some embodiments, the DMRS pattern includes at least two CDM groups therein.

For example, the DMRS pattern includes 2 CDM groups, denoted as CDM group 0 and CDM group 1, respectively.

For another example, the DMRS pattern includes 3 CDM groups, which are denoted as CDM group 0, CDM group 1, and CDM group 2, respectively.

For another example, the DMRS pattern includes 4 CDM groups, which are respectively denoted as CDM group 0, CDM group 1, CDM group 2, and CDM group 3.

Optionally, in some embodiments, the M symbols are discontinuous in the time domain. Optionally, when m=4, the 4 symbols include 2 pre-DMRS symbols and 2 additional DMRS symbols, the 2 pre-DMRS symbols are continuous in the time domain, the 2 additional DMRS symbols are discontinuous in the time domain, and furthermore, the 2 pre-DMRS symbols are also discontinuous with the 2 additional DMRS symbols in the time domain. That is, 4 symbols are discontinuous in the time domain.

Alternatively, in other embodiments, the M symbols are contiguous in the time domain.

Optionally, in some embodiments, the DMRS pattern supports transmission of N-layer data, N being a positive integer, and n+.2. For example, n=2, 3,4. Of course, the DMRS pattern may also support transmission of layer 1 data, which is not limited in the embodiment of the present application.

Optionally, in some embodiments, the M symbols include a pre-DMRS symbol and/or an additional DMRS symbol.

For example, the M symbols include only pre-DMRS symbols.

For another example, the M symbols include a preamble DMRS symbol and an additional (additional) DMRS symbol.

In some embodiments, one CDM group occupies consecutive subcarriers in the frequency domain in a DMRS pattern within one Resource Block (RB).

In other embodiments, in the DMRS pattern within one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into a plurality of portions in the frequency domain.

In still other embodiments, one CDM group occupies discontinuous subcarriers in the frequency domain in the DMRS pattern within one RB.

Optionally, in some embodiments, the DMRS pattern supports at least one DMRS type.

For example, the DMRS pattern supports type-1 DMRS.

For another example, the DMRS pattern supports type-2 DMRS.

In addition, the DMRS pattern may also support some other DMRS types, which is not limited in this application.

In some embodiments, in case that REs performing OCC combining within the CDM group are located on one symbol, the DMRS pattern supports a maximum of 4 ports. In this case, the communication device may select some or all ports within one CDM group to transmit or receive DMRS.

In other embodiments, the DMRS pattern supports a maximum of 12 ports in case that REs performing OCC combining within the CDM group are located on one symbol. In this case, the communication device may select some or all ports within one CDM group to transmit or receive DMRS.

Of course, in the case where REs performing OCC combining within the CDM group are located on one symbol, the DMRS pattern may also support other numbers of ports, which is not limited in this application.

In some embodiments, the DMRS pattern supports a maximum of 8 ports in case that REs performing OCC combining within the CDM group are located on M symbols. In this case, the communication device may select some or all ports within one CDM group to transmit or receive DMRS.

In some embodiments, the DMRS pattern supports a maximum of 12 ports in case that REs performing OCC combining within the CDM group are located on M symbols. In this case, the communication device may select some or all ports within one CDM group to transmit or receive DMRS.

Of course, in the case where REs performing OCC combining within the CDM group are located on M symbols, the DMRS pattern may also support other numbers of ports, which is not limited in this application.

It should be noted that, the ports in the embodiments of the present application may also be referred to as DMRS pilot ports.

Optionally, in some embodiments, the DMRS pattern is for at least one of the following subcarrier spacings:

120kHz，240kHz，480kHz，960kHz，1920kHz。

that is, the DMRS pattern supports a high frequency large subcarrier spacing.

The DMRS pattern may be used for other subcarrier intervals, for example, subcarrier intervals smaller than 120kHz, and subcarrier intervals larger than 1920kHz, which is not limited in this application.

Therefore, in the embodiment of the present application, REs performing OCC combining within the CDM group in the DMRS pattern are located on consecutive subcarriers of one symbol; alternatively, REs performing OCC combining within a CDM group in the DMRS pattern are located on consecutive subcarriers of M symbols; alternatively, REs performing OCC combining within a CDM group in the DMRS pattern are located on the same subcarriers of M symbols. That is, the DMRS pattern satisfies the high frequency communication requirement, and improves the performance of DMRS channel estimation in the case of high frequency large subcarrier spacing, thereby improving the system performance.

The DMRS patterns in the embodiments of the present application are described in detail below with examples 1 and 2.

In embodiment 1, the DMRS pattern supports type-1 DMRS, and the DMRS pattern includes 2 CDM groups, denoted as CDM group 0 and CDM group 1, respectively.

Alternatively, in embodiment 1, for single symbol DMRS, REs performing OCC combining within a CDM group in the DMRS pattern are located on consecutive subcarriers of 1 symbol. Specifically, 2 REs for performing OCC combining in the CDM group are located on 2 consecutive subcarriers of 1 symbol, and multiplexed by means of frequency domain OCC, so that at most 4 ports can be supported. Further, in one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into 3 parts in the frequency domain. As shown in fig. 8, CDM group 0 includes port 0 and port 1, CDM group 1 includes port 2 and port 3, wherein fig. 8 exemplarily shows 2 REs (2 REs in a black bold line) for performing OCC merge on port 0, 2 REs for performing OCC merge on

port

1, 2 REs for performing OCC merge on

port

2, and 2 REs for performing OCC merge on port 3. The 2 REs in the black bold line in fig. 8 are the 2 REs that perform OCC merge. The other REs performing OCC merge on port 0, port 1, port 2, and port 3 are similar, and the other REs performing OCC merge may be determined with reference to the 2 REs performing OCC merge that have been shown.

That is, for single symbol DMRS, a plurality of REs performing OCC combining within a CDM group may be concentrated as much as possible on the frequency domain.

For a single symbol DMRS, it includes 1 pre-DMRS symbol.

Alternatively, in one implementation, for a single symbol DMRS, when the number of transmission layers is 2, the communication device may select only ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, such as 4 layers, the communication device may select a plurality of ports of different CDM groups (such as port 0 and port 1 of CDM group 0, and port 2 and port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in embodiment 1, for a dual symbol DMRS, REs performing OCC combining within a CDM group in the DMRS pattern are located on consecutive subcarriers of 2 symbols. Specifically, 4 REs for performing OCC combining in the CDM group are located on 2 consecutive subcarriers of 2 symbols, and multiplexed by means of time domain+frequency domain OCC, so that at most 8 ports can be supported. Further, in one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into 3 parts in the frequency domain. As shown in fig. 9, CDM group 0 includes port 0, port 1, port 4 and port 5, CDM group 1 includes port 2, port 3, port 6 and port 7, wherein fig. 9 exemplarily shows 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, and 4 REs for performing OCC merge on port 7. The 4 REs in the black bold line in fig. 9 are the 4 REs that perform OCC merge. The other REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, and port 7 are similar, and the other REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

That is, for the dual symbol DMRS, a plurality of REs performing OCC combining within the CDM group may be concentrated as much as possible on the frequency domain.

For a dual symbol DMRS, it may include 2 pre-DMRS symbols, as shown in fig. 6. Of course, for a dual symbol DMRS, it may also include 1 pre-DMRS symbol and 1 additional DMRS symbol, in which case the two symbols are discontinuous.

Alternatively, in one implementation, for a dual symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 4, and port 5 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0 and port 1 of CDM group 0, and port 2 and port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in another implementation, for a dual symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 4, and port 5 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0, port 1, port 4, and port 5 of CDM group 0, and port 2, port 3, port 6, and port 7 of CDM group 1) to receive or transmit DMRS.

Alternatively, in embodiment 1, for a four-symbol DMRS, REs performing OCC combining within a CDM group in the DMRS pattern are located on the same subcarriers of 4 symbols. Specifically, 4 REs for performing OCC combining in the CDM group are located on the same subcarrier of 4 symbols, and multiplexed by means of time domain OCC, so that at most 8 ports can be supported. Further, in one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into 6 parts in the frequency domain. As shown in fig. 10, CDM group 0 includes port 0, port 1, port 4 and port 5, CDM group 1 includes port 2, port 3, port 6 and port 7, wherein fig. 10 exemplarily shows 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, and 4 REs for performing OCC merge on port 7. The 4 REs in the black bold line in fig. 10 are the 4 REs that perform OCC merge. The other REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, and port 7 are similar, and the other REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

For a four-symbol DMRS, which includes 2 pre-DMRS symbols and 2 additional DMRS symbols, the specific positions are shown in fig. 7. In addition, for a four-symbol DMRS, 1 pre-DMRS and 3 additional DMRS symbols may be used.

That is, for a four-symbol DMRS, a plurality of REs performing OCC combining within a CDM group may be placed on a plurality of symbols on the same subcarrier.

Alternatively, in one implementation, for a four-symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 4, and port 5 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0, port 1, and port 2, port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in another implementation, for a four-symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 2, port 3, port 6, and port 7 of CDM group 1) or a plurality of ports of different CDM groups (e.g., port 0, port 1, port 4, and port 5 of CDM group 0, and port 2, port 3, port 6, and port 7 of CDM group 1) to receive or transmit DMRS.

Alternatively, in embodiment 1, for DMRS greater than four symbols, the DMRS pattern may refer to four symbols DMRS, and will not be described herein.

Therefore, in embodiment 1, for the type-1 dmrs, REs in the dmrs pattern in which OCC combining is performed within the CDM group are relatively concentrated in frequency domain positions, which is advantageous for improving accuracy of channel estimation.

In embodiment 2, the DMRS pattern supports type-2 DMRS, and the DMRS pattern includes 3 CDM groups, denoted as CDM group 0, CDM group 1, and CDM group 2, respectively.

Alternatively, in embodiment 2, for single symbol DMRS, REs performing OCC combining within a CDM group in the DMRS pattern are located on consecutive subcarriers of 1 symbol. Specifically, 4 REs for performing OCC combining in the CDM group are multiplexed on 4 consecutive subcarriers of 1 symbol, that is, in the manner of frequency domain OCC, and up to 12 ports can be supported. Further, in one RB, one CDM group occupies consecutive subcarriers in the frequency domain. As shown in fig. 11, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, CDM group 2 includes port 4, port 5, port 10 and port 11, wherein fig. 11 exemplarily shows 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 11 are the 4 REs that perform OCC merge.

That is, for single symbol DMRS, 4 subcarriers performing OCC combining within the same CDM group may be grouped together.

For a single symbol DMRS, it includes 1 pre-DMRS symbol.

Alternatively, in one implementation, for a single symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0 and port 1 of CDM group 0, and port 2 and port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in another implementation, for a single symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0, port 1, port 6, and port 7 of CDM group 0, and port 2, port 3, port 8, and port 9 of CDM group 1) to receive or transmit DMRS.

Optionally, in embodiment 2, for the dual symbol DMRS, REs in the CDM group in the DMRS pattern that perform OCC combining are located on consecutive subcarriers of 2 symbols, and multiplexing is performed by means of time domain+frequency domain OCC, and a maximum of 12 ports can be supported. Specifically, the DMRS pattern may correspond to case 1 and case 2 as follows.

Case 1, 4 REs performing OCC combining within a cdm group are located on 2 consecutive subcarriers of 2 symbols. Further, in one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into 2 parts in the frequency domain. That is, a plurality of units included in the same CDM group within one RB are uniformly dispersed with two REs adjacent in the frequency domain as one unit. As shown in fig. 12, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, and CDM group 2 includes port 4, port 5, port 10 and port 11. Wherein, fig. 12 illustrates 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 12 are the 4 REs that perform OCC merge. The REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port 10, and port 11 are similar, and the REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

Case 2, 4 REs performing OCC combining within a cdm group are located on 2 consecutive subcarriers of 2 symbols. Further, in one RB, one CDM group occupies consecutive subcarriers in the frequency domain. That is, two REs adjacent in the frequency domain are used as one unit, and two units of the same CDM group within one RB are also adjacent. As shown in fig. 13, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, and CDM group 2 includes port 4, port 5, port 10 and port 11. Fig. 13 illustrates 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 13 are the 4 REs that perform OCC merge. The REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port 10, and port 11 are similar, and the REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

It should be noted that, since the dispersed DMRS is more favorable for channel estimation, case 1 is more preferable than case 2.

For a dual symbol DMRS, it may include 2 pre-DMRS symbols, as shown in fig. 12 and 13. Of course, for a dual symbol DMRS, it may also include 1 pre-DMRS symbol and 1 additional DMRS symbol, in which case the two symbols are discontinuous.

Alternatively, in one implementation, for a dual symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0 and port 1 of CDM group 0, and port 2 and port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in another implementation, for a dual symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0, port 1, port 6, and port 7 of CDM group 0, port 2, port 3, port 8, and port 9 of CDM group 1, and port 4, port 5, port 10, and port 11 of CDM group 2) to receive or transmit DMRS.

Optionally, in embodiment 2, for the four-symbol DMRS, REs in the CDM group in the DMRS pattern that perform OCC combining are located on the same subcarriers of 4 symbols, and multiplexing is performed by means of time domain OCC, so that a maximum of 12 ports can be supported. Specifically, the DMRS pattern may correspond to case 3, case 4, and case 5 as follows.

Case 3, 4 REs in the CDM group performing OCC combining in the dmrs pattern are located on the same subcarrier of 4 symbols. Further, in one RB, one CDM group is discontinuous in the frequency domain, and one CDM group is uniformly divided into 4 parts in the frequency domain. That is, with each RE in the frequency domain as one unit, a plurality of units contained in the same CDM group within one RB are uniformly dispersed. As shown in fig. 14, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, and CDM group 2 includes port 4, port 5, port 10 and port 11. Fig. 14 illustrates 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 14 are the 4 REs that perform OCC merging. The REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port 10, and port 11 are similar, and the REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

Case 4, 4 REs in the dmrs pattern that perform OCC combining within the CDM group are located on the same subcarrier of 4 symbols. Further, in one RB, one CDM group is partially continuous in the frequency domain, and one CDM group is uniformly divided into 2 parts in the frequency domain. That is, each RE in the frequency domain is used as a unit, and a plurality of units included in the same CDM group in one RB are adjacent to each other in pairs. As shown in fig. 15, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, and CDM group 2 includes port 4, port 5, port 10 and port 11. Fig. 15 illustrates 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 15 are the 4 REs that perform OCC merge. The REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port 10, and port 11 are similar, and the REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

Case 6, 4 REs performing OCC combining within the CDM group in the dmrs pattern are located on the same subcarrier of 4 symbols. Further, in one RB, one CDM group is continuous in the frequency domain. That is, a plurality of REs included in the same CDM group within one RB are relatively concentrated in the frequency domain. As shown in fig. 16, CDM group 0 includes port 0, port 1, port 6 and port 7, CDM group 1 includes port 2, port 3, port 8 and port 9, and CDM group 2 includes port 4, port 5, port 10 and port 11. Wherein, fig. 16 illustrates 4 REs for performing OCC merge on port 0, 4 REs for performing OCC merge on port 1, 4 REs for performing OCC merge on port 2, 4 REs for performing OCC merge on port 3, 4 REs for performing OCC merge on port 4, 4 REs for performing OCC merge on port 5, 4 REs for performing OCC merge on port 6, 4 REs for performing OCC merge on port 7, 4 REs for performing OCC merge on port 8, 4 REs for performing OCC merge on port 9, 4 REs for performing OCC merge on port 10, and 4 REs for performing OCC merge on port 11. The 4 REs in the black bold line in fig. 16 are the 4 REs that perform OCC merging. The REs performing OCC combining on port 0, port 1, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port 10, and port 11 are similar, and the REs performing OCC combining may be determined with reference to the 4 REs performing OCC combining that have been shown.

It should be noted that, since the dispersed DMRS is more favorable for channel estimation, case 3 is better than cases 4 and 5. Further, case 4 described above is more preferable than case 5.

For a four-symbol DMRS, which includes 2 pre-DMRS symbols and 2 additional DMRS symbols, the specific positions are shown in fig. 14, 15 and 16. In addition, for a four-symbol DMRS, 1 pre-DMRS symbol and 3 additional DMRS symbols may be used.

Alternatively, in one implementation, for a four-symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0 and port 1 of CDM group 0, and port 2 and port 3 of CDM group 1) to receive or transmit the DMRS.

Alternatively, in another implementation, for a four-symbol DMRS, when the number of transmission layers is 2, the communication device may select only a portion of ports within the same CDM group (e.g., port 0 and port 1 in CDM group 0) to receive or transmit the DMRS; when the number of transmission layers is greater than 2, the communication device may select a plurality of ports within the same CDM group (e.g., port 0, port 1, port 6, and port 7 in CDM group 0) or a plurality of ports of different CDM groups (e.g., port 0, port 1, port 6, and port 7 of CDM group 0, and port 4, port 5, port 10, and port 11 of CDM group 2) to receive or transmit DMRS.

In embodiment 2, the DMRS symbols are different in number, and pattern in the frequency domain is also transformed. This feature is different from the current DMRS, and if the DMRS with multiple symbols is simply a repetition in the time domain, the frequency domain positions are the same.

Alternatively, in embodiment 2, for DMRS greater than four symbols, the DMRS pattern may refer to four symbols DMRS, and will not be described herein.

Therefore, in embodiment 2, for the type-2 dmrs, REs in the dmrs pattern in which OCC combining is performed within the CDM group are relatively concentrated in frequency domain positions, which is advantageous for improving accuracy of channel estimation.

In embodiment 1 and embodiment 2, the positions of DMRS symbols in the schematic diagrams are for reference only, and the specific DMRS symbol positions need to be determined according to the DMRS type, the number of symbols, the symbol length of the data channel, and the like.

The method embodiments of the present application are described in detail above with reference to fig. 7 to 16, and the apparatus embodiments of the present application are described in detail below with reference to fig. 17 to 20, it being understood that the apparatus embodiments and the method embodiments correspond to each other, and similar descriptions may refer to the method embodiments.

Fig. 17 shows a schematic block diagram of a communication device 300 according to an embodiment of the present application. As shown in fig. 17, the communication apparatus 300 includes:

A communication unit 310, configured to send or receive DMRS according to a demodulation reference signal DMRS pattern;

wherein, the resource elements RE in the DMRS pattern for performing orthogonal cover code OCC combining in the code division multiplexing CDM group satisfies one of the following:

Optionally, the M symbols are discontinuous in the time domain.

Optionally, the M symbols are consecutive in the time domain.

Optionally, the DMRS pattern supports transmission of N layer data, N is a positive integer, and N is not less than 2.

Optionally, the M symbols include a pre-DMRS symbol and/or an additional DMRS symbol.

Optionally, in the DMRS pattern, one CDM group occupies consecutive subcarriers in a frequency domain; or alternatively, the process may be performed,

in the DMRS pattern, one CDM group occupies at least two consecutive subcarriers in a frequency domain; or alternatively, the process may be performed,

in the DMRS pattern, one CDM group occupies discontinuous subcarriers in the frequency domain.

Optionally, the DMRS pattern supports at least one DMRS type.

Alternatively, in case that REs performing OCC combining within the CDM group are located on one symbol, the DMRS pattern supports at most 4 ports, or the DMRS pattern supports at most 12 ports; or alternatively, the process may be performed,

in case that REs performing OCC combining within the CDM group are located on M symbols, the DMRS pattern supports a maximum of 12 ports, or the DMRS pattern supports a maximum of 8 ports.

Optionally, at least two CDM groups are included in the DMRS pattern.

Optionally, the DMRS pattern is for at least one of the following subcarrier intervals:

120kHz，240kHz，480kHz，960kHz，1920kHz。

alternatively, in some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip.

It should be understood that the communication device 300 according to the embodiments of the present application may correspond to the communication device in the embodiments of the method of the present application, and the foregoing and other operations and/or functions of each unit in the communication device 300 are respectively for implementing the corresponding flow of the communication device in the method 200 shown in fig. 7, and are not further described herein for brevity.

Fig. 18 is a schematic structural diagram of a communication device 400 provided in an embodiment of the present application. The communication device 400 shown in fig. 18 comprises a processor 410, from which the processor 410 may call and run a computer program to implement the method in the embodiments of the present application.

Optionally, as shown in fig. 18, the communication device 400 may also include a memory 420. Wherein the processor 410 may call and run a computer program from the memory 420 to implement the methods in embodiments of the present application.

Wherein the memory 420 may be a separate device from the processor 410 or may be integrated into the processor 410.

Optionally, as shown in fig. 18, the communication device 400 may further include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

Among other things, transceiver 430 may include a transmitter and a receiver. Transceiver 430 may further include antennas, the number of which may be one or more.

Optionally, the communication device 400 may be a communication device in the embodiment of the present application, and the communication device 400 may implement a corresponding flow implemented by the communication device in each method in the embodiment of the present application, which is not described herein for brevity.

Fig. 19 is a schematic structural view of an apparatus of an embodiment of the present application. The apparatus 500 shown in fig. 19 includes a processor 510, and the processor 510 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in fig. 19, the apparatus 500 may further comprise a memory 520. Wherein the processor 510 may call and run a computer program from the memory 520 to implement the methods in embodiments of the present application.

Wherein the memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

Optionally, the apparatus 500 may further comprise an input interface 530. The processor 510 may control the input interface 530 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the apparatus 500 may further comprise an output interface 540. Wherein the processor 510 may control the output interface 540 to communicate with other devices or chips, and in particular may output information or data to other devices or chips.

Optionally, the apparatus may be applied to a communication device in the embodiments of the present application, and the apparatus may implement a corresponding flow implemented by the communication device in each method in the embodiments of the present application, which is not described herein for brevity.

Alternatively, the device mentioned in the embodiments of the present application may also be a chip. For example, a system-on-chip or a system-on-chip, etc.

Fig. 20 is a schematic block diagram of a communication system 600 provided by an embodiment of the present application. As shown in fig. 20, the communication system 600 includes a terminal device 610 and a network device 620.

The terminal device 610 may be used to implement the corresponding functions implemented by the communication device in the above method, and the network device 620 may also be used to implement the corresponding functions implemented by the communication device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a communication device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the communication device in each method in the embodiments of the present application, which is not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a communication device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding processes implemented by the communication device in the methods in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the communication device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the communication device in each method in the embodiments of the present application, which is not described herein for brevity.

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

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

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

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

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. For such understanding, the technical solutions of the present application may be embodied in essence or in a part contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions for causing 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 the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising:

the communication equipment transmits or receives the DMRS according to the demodulation reference signal (DMRS) pattern;

wherein, the resource elements RE in the DMRS pattern for performing orthogonal cover code OCC combining in the code division multiplexing CDM group satisfies one of the following:

REs performing OCC combining within the CDM group are located on consecutive subcarriers of one symbol;

RE for executing OCC combination in the CDM group is positioned on continuous subcarriers of M symbols, M is a positive integer, and M is more than or equal to 2;

RE performing OCC combination in the CDM group is positioned on the same subcarrier of M symbols, M is a positive integer, and M is more than or equal to 2.
The method of claim 1, wherein the M symbols are discontinuous in the time domain.
The method of claim 1, wherein the M symbols are contiguous in the time domain.
The method of any one of claims 1 to 3, wherein the DMRS pattern supports transmission of N layer data, N being a positive integer, and N being ≡2.
The method of any of claims 1 to 4, wherein the M symbols comprise a pre-DMRS symbol and/or an additional DMRS symbol.
The method of any of claims 1 to 5, wherein the DMRS pattern supports at least one DMRS type.
The method according to any one of claim 1 to 6,

in case that REs performing OCC combining within the CDM group are located on one symbol, the DMRS pattern supports at most 4 ports, or the DMRS pattern supports at most 12 ports; or alternatively, the process may be performed,

in case that REs performing OCC combining within the CDM group are located on M symbols, the DMRS pattern supports a maximum of 12 ports, or the DMRS pattern supports a maximum of 8 ports.
The method according to any one of claim 1 to 7,

the DMRS pattern includes at least two CDM groups therein.
The method of any one of claims 1 to 8, wherein the DMRS pattern is for at least one of the following subcarrier intervals:

120kHz，240kHz，480kHz，960kHz，1920kHz。
a communication device, comprising:

a communication unit, configured to send or receive DMRS according to a demodulation reference signal DMRS pattern;

wherein, the resource elements RE in the DMRS pattern for performing orthogonal cover code OCC combining in the code division multiplexing CDM group satisfies one of the following:

REs performing OCC combining within the CDM group are located on consecutive subcarriers of one symbol;

RE for executing OCC combination in the CDM group is positioned on continuous subcarriers of M symbols, M is a positive integer, and M is more than or equal to 2;

RE performing OCC combination in the CDM group is positioned on the same subcarrier of M symbols, M is a positive integer, and M is more than or equal to 2.
The communication device of claim 10, wherein the M symbols are discontinuous in the time domain.
The communication device of claim 10, wherein the M symbols are contiguous in the time domain.
The communication device of any of claims 10 to 12, wherein the DMRS pattern supports transmission of N layers of data, N being a positive integer, and N being ≡2.
The communication device of any of claims 10 to 13, wherein the M symbols comprise a pre-DMRS symbol and/or an additional DMRS symbol.
The communication device of any of claims 10 to 14, wherein the DMRS pattern supports at least one DMRS type.
A communication device as claimed in any one of claims 10 to 15,

in case that REs performing OCC combining within the CDM group are located on one symbol, the DMRS pattern supports at most 4 ports, or the DMRS pattern supports at most 12 ports; or alternatively, the process may be performed,

in case that REs performing OCC combining within the CDM group are located on M symbols, the DMRS pattern supports a maximum of 12 ports, or the DMRS pattern supports a maximum of 8 ports.
A communication device as claimed in any one of claims 10 to 16,

the DMRS pattern includes at least two CDM groups therein.
The communication device of any of claims 10 to 17, wherein the DMRS pattern is for at least one of the following subcarrier intervals:

120kHz，240kHz，480kHz，960kHz，1920kHz。
a communication device, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 9.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 9.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 9.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 9.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 9.