WO2023019857A1

WO2023019857A1 - Dmrs sending method and apparatus, dmrs receiving method and apparatus, and computer-readable storage medium

Info

Publication number: WO2023019857A1
Application number: PCT/CN2021/142783
Authority: WO
Inventors: 张萌
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-08-19
Filing date: 2021-12-30
Publication date: 2023-02-23
Also published as: CN115913483A

Abstract

A DMRS sending method and apparatus, a DMRS receiving method and apparatus, and a computer-readable storage medium. The DMRS sending method comprises: determining a mapping relationship between resource elements occupied by a DMRS and ports, wherein in the mapping relationship, each port corresponds to eight resource elements on two symbols, and the DMRS occupies four symbols in a single slot, or each port corresponds to four resource elements on two symbols, and the DMRS occupies two symbols in the single slot; and sending the DMRS according to the mapping relationship. By means of the technical solution of the present invention, the mapping of a DMRS to more ports can be achieved.

Description

DMRS sending and receiving method and device, computer-readable storage medium

This application claims the priority of the Chinese patent application submitted to the China Patent Office on August 19, 2021, with the application number 202110955421.X, and the title of the invention is "DMRS transmission and reception method and device, computer-readable storage medium", the entire content of which Incorporated in this application by reference.

technical field

The present invention relates to the technical field of communication, in particular to a DMRS sending and receiving method and device, and a computer-readable storage medium.

Background technique

In the prior art, a demodulation reference signal (Demodulation Reference Signal, DMRS) can be mapped to a maximum of 12 ports (port). In order to support higher-speed transmission in the future, the number of supported ports needs to be further increased.

However, how to realize the mapping of DMRS to more ports is an urgent problem to be solved.

Contents of the invention

The technical problem solved by the invention is how to realize the mapping of DMRS to more ports.

In order to solve the above technical problems, the embodiment of the present invention provides a DMRS sending method, the DMRS sending method includes: determining the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to two 8 resource elements on a symbol, DMRS occupies 4 symbols in a single slot, or, each port corresponds to 4 resource elements on two symbols, DMRS occupies 2 symbols in a single slot; according to the mapping The relationship sends the DMRS out.

Optionally, when the DMRS occupies 4 symbols in a single time slot, the 4 symbols are respectively two symbols occupied by the pre-DMRS in the time domain and two symbols occupied by the additional DMRS in the time domain, Each port corresponds to 4 resource elements on a single symbol.

Optionally, when the DMRS occupies 4 symbols in a single time slot, the 4 symbols are respectively the two symbols occupied by the pre-DMRS in the time domain and the other two consecutive symbols in the same time slot, each Ports correspond to 4 resource elements on a single symbol.

Optionally, when each port corresponds to 8 resource elements on two symbols, each CDM group indicates 8 resource elements, and the 8 resource elements correspond to 8 ports.

Optionally, the 8 resource elements occupy two symbols in the time domain and four subcarriers in the frequency domain.

Optionally, when the DMRS occupies 2 symbols in a single time slot, each port corresponds to 2 resource elements in a single symbol.

Optionally, when the DMRS configuration type is type 2, the maximum number of ports supported by the time-frequency resource of a single time slot is 24.

Optionally, the symbols occupied by the downlink shared channel or the uplink shared channel where the DMRS is located in the time domain cover the symbols occupied by the DMRS.

The embodiment of the present invention also provides a DMRS receiving method. The DMRS receiving method includes: receiving the DMRS; determining each port according to the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to two 8 resource elements on each symbol, DMRS occupies 4 symbols in a single slot, or, each port corresponds to 4 resource elements on two symbols, DMRS occupies 2 symbols in a single slot.

The embodiment of the present invention also provides a DMRS sending device. The DMRS sending device includes: a mapping relationship determination module, configured to determine the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, DMRS occupies 4 symbols in a single slot, or, each port corresponds to 4 resource elements on two symbols, DMRS occupies 2 symbols in a single slot; DMRS sends A module, configured to send the DMRS according to the mapping relationship.

The embodiment of the present invention also provides a DMRS receiving device. The DMRS receiving device includes: a DMRS receiving module for receiving a DMRS; a port mapping module for determining each port according to the mapping relationship between resource elements occupied by the DMRS and each port, wherein, In the mapping relationship, each port corresponds to 8 resource elements on two symbols, and DMRS occupies 4 symbols in a single time slot, or, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 4 symbols in a single time slot. 2 symbols are occupied in a single slot.

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the DMRS sending method or the steps of the DMRS sending and receiving are executed.

The embodiment of the present invention also provides a DMRS sending device, including a memory and a processor, the memory stores a computer program that can run on the processor, and the processor executes the DMRS when running the computer program. The steps of the sending method.

An embodiment of the present invention also provides a DMRS receiving device, including a memory and a processor, the memory stores a computer program that can run on the processor, and the processor executes the DMRS when running the computer program. The steps of the receive method.

The embodiment of the present invention also discloses a data multiplexing indication method. The data multiplexing indication method includes: determining at least one DMRS port being called, and the identifier of the code division multiplexing group corresponding to the at least one DMRS port. DMRS There is a corresponding relationship between the port and the identifier of the code division multiplexing group; the identifier of each code division multiplexing group is sent out.

Optionally, the sending the identifier of each code division multiplexing group includes: sending the identifier of each code division multiplexing group in the form of a bitmap (bitmap).

Optionally, before sending the identifier of each code division multiplexing group includes: sending the number of the code division multiplexing group corresponding to the at least one DMRS port.

The embodiment of the present invention also discloses another data multiplexing indication method. The data multiplexing indication method includes: determining at least one DMRS port being called, and the number of code division multiplexing groups corresponding to the at least one DMRS port; Send out the quantity of the code division multiplexing group.

Optionally, the maximum number of the code division multiplexing groups is 6.

Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

In the technical solution of the present invention, in the mapping relationship between resource elements occupied by DMRS and each port, each port corresponds to 8 resource elements on two symbols, and DMRS occupies 4 symbols in a single time slot, or each port corresponds to 4 resource elements over two symbols, DMRS occupies 2 symbols in a single slot. Compared with the DMRS occupying two symbols in the time slot in the prior art, the technical solution of the present invention realizes mapping resource elements occupied by the DMRS with more port numbers by occupying 4 symbols in the time domain; or, by Each port corresponds to 4 resource elements on two symbols. On the basis that DMRS occupies 2 symbols in a single time slot, the resource elements occupied by DMRS are mapped to more ports, so as to achieve high-speed Data transfer support.

Description of drawings

Fig. 1 is the flowchart of a kind of DMRS transmission method of the embodiment of the present invention;

FIG. 2 is a schematic diagram of a mapping relationship between resource elements and ports occupied by a DMRS according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a mapping relationship between resource elements and ports occupied by another DMRS according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a DMRS sending device according to an embodiment of the present invention;

Fig. 5 is a flowchart of a data multiplexing indication method according to an embodiment of the present invention.

Detailed ways

As mentioned in the background art, how to realize the mapping of DMRS to more ports is an urgent problem to be solved.

The technical scheme of the present invention realizes mapping the resource elements occupied by the DMRS with more ports by occupying 4 symbols in the time domain; or, by mapping each port to 4 resource elements on two symbols, the DMRS On the basis of occupying 2 symbols in a single time slot, the resource elements occupied by DMRS are mapped to more ports, so as to support high-speed data transmission.

The Fangming technical solution can be applied to 5G (5Generation) communication systems, 4G, 3G communication systems, and various new communication systems in the future, such as 6G, 7G, etc.

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a flow chart of a DMRS sending method according to an embodiment of the present invention.

The embodiments of the present invention may be used on the network device side or the user equipment side, that is, each step of the method may be executed by the network device side or the user equipment. Specifically, when the DMRS is an uplink DMRS, the DMRS sending method is executed by a user equipment; when the DMRS is a downlink DMRS, the DMRS sending method is executed by a network device. Wherein, the user equipment includes but is not limited to terminal equipment such as a mobile phone, a computer, and a tablet computer. The network device may be a base station or a core network device.

Specifically, the DMRS sending method may include the following steps:

Step 101: Determine the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS occupies 4 symbols in a single time slot, Alternatively, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot;

Step 102: Send the DMRS according to the mapping relationship.

It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution order of the steps.

It can be understood that, in a specific implementation, the DMRS sending method may be implemented in the form of a software program, and the software program runs in a processor integrated in a chip or a chip module.

In one embodiment of the present invention, each port corresponds to 8 resource elements on two symbols, and DMRS occupies 4 symbols in a single time slot. The same 8 resource elements can be mapped to 4 ports through Code Division Multiplexing (CDM, Code Division Multiplexing). Thus, within a physical resource block (Physical Resource Block, PRB) resource with one time slot in the time domain and 12 subcarriers in the frequency domain, mapping to 12 ports can be realized. On this basis, by extending DMRS to occupy 4 symbols in a single time slot, the mapping of resource elements occupied by DMRS to 24 ports can be realized.

Specifically, refer to FIG. 2. In the physical resource block resources shown in FIG. 2, on

symbols

2 and 3, ports AP0, AP2, AP4, AP1, AP3, AP5, AP6, and AP8 can be realized through code division multiplexing. , AP10, AP7, AP9, AP11 mapping, wherein, code division multiplexing group 1 can indicate ports AP0, AP1, AP6 and AP7, and code division multiplexing group 2 can indicate ports AP2, AP3, AP8 and AP9; With group 3 ports AP4, AP5, AP10 and AP11 can be indicated.

Correspondingly, on symbol 9 and symbol 10, the mapping to ports AP12, AP14, AP16, AP13, AP15, AP17, AP18, AP20, AP22, AP19, AP21, and AP23 can be realized through code division multiplexing, wherein the code division Multiplexing group 4 can indicate ports AP12, AP13, AP18 and AP19; code division multiplexing group 5 can indicate ports AP14, AP15, AP20 and AP21; code division multiplexing group 6 can indicate ports AP16, AP17, AP22 and AP23.

Thus, in the physical resource block resources shown in FIG. 2 , the mapping of the resource elements occupied by the DMRS to the 24 ports AP0-AP23 is realized.

In a non-limiting embodiment, the four symbols are respectively two symbols occupied by the pre-DMRS in the time domain and two symbols occupied by the additional DMRS in the time domain, and each port is divided into two symbols in a single symbol The above corresponds to 4 resource elements.

In this embodiment, the symbols occupied by a DMRS in a single time slot are the symbols occupied by a front loaded DMRS (front loaded DMRS) and an additional DMRS (additional DMRS). Specifically, the pre-DMRS is located in symbol 2 and symbol 3 in the slot, that is, the third symbol and the fourth symbol; the extra DMRS is located in symbol 10 and symbol 11 in the slot, that is, the eleventh symbol and the tenth symbol. two symbols.

Correspondingly, the symbols occupied by the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH) where the DMRS is located in the time domain cover the symbols occupied by the DMRS. That is, only when the number of time-domain symbols of the PUSCH or PDSCH is greater than a certain value X, DMRS transmission greater than 12 ports and less than or equal to 24 ports can be used. Wherein, X may be a preset value.

For example, when the symbols occupied by the DMRS in a single slot are the symbols occupied by the pre-DMRS and the additional DMRS, the PDSCH or PUSCH needs to cover symbols 2 to 11, that is, the length of the PDSCH or PUSCH must be greater than or equal to 10 symbols , to use DMRS with more than 12 ports and less than or equal to 24 ports.

In this embodiment, the density of the DMRS in the frequency domain is that each port corresponds to 4 resource elements in a single symbol.

In another non-limiting embodiment, when a DMRS occupies 4 symbols in a single time slot, the 4 symbols are respectively the two symbols occupied by the pre-DMRS in the time domain and other consecutive symbols in the same time slot. The two symbols of , each port corresponds to 4 resource elements on a single symbol.

In this embodiment, the symbols occupied by the DMRS in a single time slot are respectively the symbols occupied by the front loaded DMRS (front loaded DMRS), and the other two consecutive symbols in the same time slot as the front loaded DMRS. Specifically, the other two symbols are located after the symbols occupied by the pre-DMRS.

For example, the pre-DMRS is located in symbol 2 and symbol 3 in the time slot, and the other two symbols may be any two consecutive symbols from symbol 4 to symbol 13.

Correspondingly, the symbols occupied by the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH) where the DMRS is located in the time domain cover the symbols occupied by the DMRS. Only when the number of time-domain symbols of the PUSCH or PDSCH is greater than a certain value X, the DMRS transmission of more than 12 ports and less than or equal to 24 ports can be used. Wherein, X can be a preset value.

For example, when the symbols occupied by DMRS in a single slot are pre-DMRS (symbol 2 and symbol 3) and symbol 4 and symbol 5 respectively, PDSCH or PUSCH needs to cover symbol 2 to symbol 5, that is, the length of PDSCH or PUSCH A DMRS with more than 12 ports and less than or equal to 24 ports can be used only when the number of symbols is greater than or equal to 4.

In a non-limiting embodiment of the present invention, when each port corresponds to 8 resource elements on two symbols, each code division multiplexing group indicates 8 resource elements, and the 8 resource elements correspond to 8 ports .

Further, the eight resource elements occupy two symbols in the time domain and four subcarriers in the frequency domain.

In a non-limiting embodiment of the present invention, when a DMRS occupies 2 symbols in a single time slot, each port corresponds to 2 resource elements in a single symbol.

In the embodiment of the present invention, each port corresponds to 2 resource elements on a single symbol, that is, the density of the DMRS in the frequency domain is that each port corresponds to 2 resource elements on a single symbol. Then each port occupies a total of four resource elements on two symbols. Thus, on the same physical resource block resource, the number of ports can be extended from 12 to 24.

Please refer to FIG. 3 for details. On

symbols

2 and 3 of physical resource block resources, the same resource element can be extended from ports AP0, AP2, and AP4 to AP0, AP2, AP4, AP12, AP14, and AP16.

Correspondingly, it can be extended from ports AP1, AP3, and AP5 to AP1, AP3, AP5, AP13, AP15, and AP17; it can be extended from ports AP6, AP8, and AP10 to AP6, AP8, AP10, AP18, AP20, and AP22; it can be extended from ports AP7, AP9, and AP11 are extended to AP7, AP9, AP11, AP19, AP21, and AP23.

In a non-limiting embodiment of the present invention, when the DMRS configuration type is type 2, the maximum number of ports supported by the time-frequency resource of a single time slot is 24.

In the prior art, when the DMRS configuration type is type1, a single symbol supports a maximum of 4 ports, and a double symbol supports a maximum of 8 ports; when the configuration type is type2, a single symbol supports a maximum of 6 ports, and a double symbol supports a maximum of 12 ports. The embodiment of the present invention realizes the expansion of DMRS port from 12 to 24 by reconstructing the resource element and port mapping relationship occupied by DMRS configuration type 2 in double symbols, and realizes the support for the maximum number of 24 ports.

The embodiment of the invention also discloses a DMRS receiving method. The DMRS receiving method may include the following steps: receiving the DMRS; determining each port according to the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resources on two symbols element, DMRS occupies 4 symbols in a single slot, or, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot.

It can be understood that, in a specific implementation, the DMRS receiving method may be implemented in the form of a software program, and the software program runs in a processor integrated in a chip or a chip module.

Specifically, when the DMRS sending method is executed by the network device, the DMRS receiving method is executed by the user equipment; when the DMRS sending method is executed by the user equipment, the DMRS receiving method is executed by the network device.

Please refer to FIG. 4, the embodiment of the present invention also discloses a DMRS sending device 40, and the DMRS sending device 40 may include:

The mapping relationship determination module 401 is configured to determine the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS is in a single time slot Occupies 4 symbols, or, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot;

The DMRS sending module 402 is configured to send the DMRS according to the mapping relationship.

For more details about the working principle and working mode of the DMRS sending device 40 , reference may be made to the related descriptions in FIG. 1 to FIG. 3 , which will not be repeated here.

The embodiment of the present invention also discloses a DMRS receiving device. The DMRS receiving device includes: a DMRS receiving module for receiving DMRS; a port mapping module for determining each port according to the mapping relationship between resource elements occupied by the DMRS and each port, wherein , in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and DMRS occupies 4 symbols in a single time slot, or, each port corresponds to 4 resource elements on two symbols, and DMRS Occupies 2 symbols in a single slot.

In a specific implementation, the above-mentioned DMRS sending device and DMRS receiving device may correspond to chips with DMRS transceiver functions in network equipment or user equipment, such as SOC (System-On-a-Chip, system on chip), baseband chip, etc.; or correspond to The network equipment or user equipment includes a chip module with DMRS transceiver function; or corresponds to a chip module with data processing function chip, or corresponds to network equipment, or corresponds to user equipment.

Referring to FIG. 5 , the embodiment of the present invention also discloses a data multiplexing indication method.

The embodiments of the present invention may be used on the network device side or the user equipment side, that is, each step of the method may be executed by the network device side or the user equipment.

Specifically, the data multiplexing indication method may include the following steps:

Step 501: Determine at least one DMRS port being called, and the identifier of the code division multiplexing group corresponding to the at least one DMRS port, and the DMRS port has a corresponding relationship with the identifier of the code division multiplexing group;

Step 502: Send out the identifiers of each code division multiplexing group.

The data multiplexing indication method in the embodiment of the present invention can indicate whether the DMRS and the data (Data) are multiplexed within the same symbol (symbol). That is to say, if a resource element occupied by a DMRS port being called is transmitting DMRS, then this resource element cannot be used to transmit data. In this case, by sending the identifier of the code division multiplexing group corresponding to at least one DMRS port, the receiving end will not demodulate data on the resource element indicated by the identifier of the code division multiplexing group.

In a specific implementation, the identifier of the code division multiplexing group may be an index of the code division multiplexing group.

In the prior art, the CDM groups without data parameter can only indicate the number of CDM groups (CDM group number), for example, the number is 1, 2 or 3. However, in this case, the receiving end cannot specify which code division multiplexing group it is, especially in the case of a large number of code division multiplexing groups. For example, when the number of DMRS ports is 24, the number of code division multiplexing groups is extended to 6, which only indicates that the number of code division multiplexing groups cannot meet the requirement. In the embodiment of the present invention, the flexibility of indication can be improved by clearly indicating the identity of the code division multiplexing group.

In a non-limiting embodiment, the identification of each code division multiplexing group is sent out in the form of a bitmap (bitmap).

For example, if the number of code division multiplexing groups is 6, the number of bits in the bitmap is 6, and each bit corresponds to the identifiers of the 6 code division multiplexing groups. When the ID of the code division multiplexing group is 1, the bit mapping is 100000; when the ID of the code division multiplexing group is 2, the bit mapping is 010000; and so on, when the ID of the code division multiplexing group is 6, the bit mapping is 000001; when the ID of the code division multiplexing group is 1 and 6, the bit mapping is 100001.

In the embodiment of the present invention, the signaling overhead can be saved by sending the identifier of the code division multiplexing group in a bit-mapping manner.

In a non-limiting embodiment, the following steps may be included before step 501: sending out the number of code division multiplexing groups corresponding to the at least one DMRS port.

In the embodiment of the present invention, the number of code division multiplexing groups can be indicated first, and then the specific code division multiplexing group identifier (CDM group index) can be determined after indicating the number of code division multiplexing groups.

In the embodiment of the present invention, the flexibility of indicating can be realized by indicating the identifier of the code division multiplexing group without changing the framework of the original standard communication protocol.

The embodiment of the present invention also discloses another data multiplexing indication method. The data multiplexing indication method includes: determining at least one DMRS port being called, and the number of code division multiplexing groups corresponding to the at least one DMRS port; Send out the quantity of the code division multiplexing group. The maximum number of the code division multiplexing groups is 6.

In the embodiment of the present invention, the default code division multiplexing group number corresponds to a fixed code division multiplexing group identifier (CDM group index). When the number of DMRS ports is 24, the number of code division multiplexing groups needs to be extended to 6.

Specifically, there is a mapping relationship between the number of code division multiplexing groups and the identifier of the code division multiplexing groups. When the number of code division multiplexing groups is 1, the identification of the corresponding code division multiplexing group is 0; when the number of code division multiplexing groups is 2, the identifications of the corresponding code division multiplexing groups are 0 and 1; When the number of multiplexing groups is 3, the identifiers of the corresponding code division multiplexing groups are 0, 1 and 2; when the number of code division multiplexing groups is 4, the identifiers of the corresponding code division multiplexing groups are 0, 1, 2 and 3; when the number of code division multiplexing groups is 5, the identification of the corresponding code division multiplexing groups is 0, 1, 2, 3 and 4; when the number of code division multiplexing groups is 6, the corresponding code division multiplexing groups Multiplexing groups are identified as 0, 1, 2, 3, 4 and 5.

Regarding each device described in the above embodiments, each module/unit contained in the product may be a software module/unit, or a hardware module/unit, or may be partly a software module/unit and partly a hardware module/unit. . For example, for each device or product applied to or integrated into a chip, each module/unit contained therein may be realized by hardware such as a circuit, or at least some modules/units may be realized by a software program, and the software program Running on the integrated processor inside the chip, the remaining (if any) modules/units can be realized by means of hardware such as circuits; They are all realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components of the chip module, or at least some modules/units can be realized by means of software programs, The software program runs on the processor integrated in the chip module, and the remaining (if any) modules/units can be realized by hardware such as circuits; /Units can be realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components in the terminal, or at least some modules/units can be implemented in the form of software programs Realization, the software program runs on the processor integrated in the terminal, and the remaining (if any) modules/units can be implemented by means of hardware such as circuits.

The embodiment of the present invention also discloses a storage medium, which is a computer-readable storage medium on which a computer program is stored, and the computer program can execute the steps of the method shown in FIG. 1 or FIG. 5 when running. The storage medium may include ROM, RAM, magnetic or optical disks, and the like. The storage medium may also include a non-volatile memory (non-volatile) or a non-transitory (non-transitory) memory, and the like.

The embodiment of the present invention also discloses a DMRS sending device. The DMRS sending device may include a memory and a processor, and a computer program that can run on the processor is stored in the memory. When the processor runs the computer program, it can execute the steps of the method shown in FIG. 1 .

The embodiment of the present invention also discloses a DMRS receiving device. The DMRS receiving device may include a memory and a processor, and the memory stores a computer program that can run on the processor. When the processor runs the computer program, it can execute the steps of the DMRS receiving method.

The Fangming technical solution is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, Vehicle-to-Everything (vehicle-to-everything communication) architecture and other architectures.

The base station (base station, BS for short) in the embodiment of the present application may also be referred to as a base station device, and is a device deployed in a radio access network (RAN) to provide a wireless communication function. For example, the equipment providing base station function in 2G network includes base wireless transceiver station (English: base transceiver station, referred to as BTS), the equipment providing base station function in 3G network includes Node B (NodeB), and the equipment providing base station function in 4G network Including evolved Node B (evolved NodeB, eNB), in wireless local area networks (wireless local area networks, referred to as WLAN), the equipment that provides base station functions is the access point (access point, referred to as AP), 5G new wireless (New Radio , referred to as NR), the device gNB that provides base station functions, and the node B (ng-eNB) that continues to evolve, in which gNB and the terminal use NR technology for communication, and the ng-eNB and the terminal use E-UTRA (Evolved Universal Terrestrial Radio Access) technology for communication, both gNB and ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes equipment that provides base station functions in future new communication systems.

The base station controller in the embodiment of the present application is a device for managing base stations, such as a base station controller (BSC for short) in a 2G network and a radio network controller (radio network controller, RNC for short) in a 3G network. ), can also refer to the device for controlling and managing the base station in the new communication system in the future.

The network side (network) in the embodiment of the present invention refers to the communication network that provides communication services for the terminal, including the base station of the wireless access network, may also include the base station controller of the wireless access network, and may also include the equipment on the core network side .

The terminal in the embodiment of the present application may refer to various forms of user equipment (user equipment, referred to as UE), access terminal, user unit, user station, mobile station, mobile station (mobile station, built as MS), remote station, remote terminal, mobile device, user terminal, terminal equipment, wireless communication device, user agent, or user device. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or future evolution of public land mobile communication networks (Public Land Mobile Network, referred to as PLMN), etc., which are not limited in this embodiment of the present application.

The embodiment of this application defines the one-way communication link from the access network to the terminal as the downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; The one-way communication link is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

It should be understood that the term "and/or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B may mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this article indicates that the associated objects are an "or" relationship.

"Multiple" appearing in the embodiments of the present application means two or more.

The first, second, etc. descriptions that appear in the embodiments of this application are only for illustration and to distinguish the description objects. Any limitations of the examples.

The "connection" in the embodiment of the present application refers to various connection methods such as direct connection or indirect connection to realize communication between devices, which is not limited in the embodiment of the present application.

It should be understood that, in the embodiments of the present application, the processor may be a central processing unit (CPU for short), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP for short) , application specific integrated circuit (ASIC for short), off-the-shelf programmable gate array (field programmable gate array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Wired or wireless transmission to another website site, computer, server or data center.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can 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 invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims

A DMRS sending method is characterized in that, comprising:

Determine the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS occupies 4 symbols in a single time slot, or, each One port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot;

Send the DMRS according to the mapping relationship.
The DMRS sending method according to claim 1, wherein when the DMRS occupies 4 symbols in a single time slot, the 4 symbols are respectively the two symbols occupied by the pre-DMRS in the time domain and the additional DMRS For two symbols occupied in the time domain, each port corresponds to 4 resource elements in a single symbol.
The DMRS sending method according to claim 1, wherein when the DMRS occupies 4 symbols in a single time slot, the 4 symbols are respectively the two symbols occupied by the pre-DMRS in the time domain and the same time slot. For the other two consecutive symbols in the slot, each port corresponds to 4 resource elements in a single symbol.
The DMRS sending method according to claim 1, wherein when each port corresponds to 8 resource elements on two symbols, each code division multiplexing group indicates 8 resource elements, and the 8 resource elements correspond to 8 ports.
The DMRS sending method according to claim 4, wherein the eight resource elements occupy two symbols in the time domain and four subcarriers in the frequency domain.
The DMRS sending method according to claim 1, wherein when the DMRS occupies 2 symbols in a single time slot, each port corresponds to 2 resource elements in a single symbol.
The DMRS sending method according to claim 1, wherein when the DMRS configuration type is type 2, the maximum number of ports supported by the time-frequency resource of a single time slot is 24.
The DMRS sending method according to claim 1, wherein the symbols occupied by the downlink shared channel or the uplink shared channel where the DMRS is located in the time domain cover the symbols occupied by the DMRS.
A DMRS receiving method is characterized in that, comprising:

receive DMRS;

Each port is determined according to the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS occupies 4 symbols in a single time slot, Alternatively, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot.
A DMRS sending device is characterized in that it comprises:

A mapping relationship determining module, configured to determine a mapping relationship between resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS occupies a single time slot 4 symbols, or, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot;

The DMRS sending module is configured to send the DMRS according to the mapping relationship.
A DMRS receiving device is characterized in that it comprises:

DMRS receiving module, for receiving DMRS;

The port mapping module is used to determine each port according to the mapping relationship between the resource elements occupied by the DMRS and each port, wherein, in the mapping relationship, each port corresponds to 8 resource elements on two symbols, and the DMRS in a single time slot Occupies 4 symbols in , or, each port corresponds to 4 resource elements on two symbols, and DMRS occupies 2 symbols in a single slot.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is run by a processor, the steps of the DMRS sending method described in any one of claims 1 to 8 are executed, or claim 9 The step of sending and receiving the DMRS.
A DMRS sending device, comprising a memory and a processor, the memory stores a computer program that can run on the processor, wherein the processor executes claims 1 to 8 when running the computer program The steps of any one of the DMRS sending methods.
A DMRS receiving device, comprising a memory and a processor, the memory is stored with a computer program that can run on the processor, wherein the processor executes the computer program described in claim 9 when running the computer program Steps of the DMRS receiving method.