CN115883039A

CN115883039A - Indication method of demodulation reference signal DMRS port

Info

Publication number: CN115883039A
Application number: CN202111136371.9A
Authority: CN
Inventors: 蔡世杰; 刘显达; 张哲宁; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-03-31
Also published as: WO2023045751A1

Abstract

The embodiment of the application provides a demodulation reference signal DMRS port indication method and a device, wherein the method comprises the following steps: the method comprises the steps that network equipment determines a DMRS port set corresponding to a first sub-band, wherein the DMRS port set comprises a first DMRS port set, and the first DMRS port set corresponds to terminal equipment; the network equipment transmits first indication information, wherein the first indication information is used for indicating that the DMRS port set comprises M second DMRS port sets in the N second DMRS port sets, N and M are positive integers which are larger than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth also comprises a second sub-band, and the first sub-band is different from the second sub-band. By the technical scheme, the flexibility of the communication system can be improved, and the resource waste is reduced.

Description

Indication method of demodulation reference signal DMRS port

Technical Field

The embodiment of the application relates to the field of communication, in particular to an indication method of a demodulation reference signal DMRS port.

Background

At present, in a wireless communication system, considering that channel coefficients from different antenna ports to a terminal device are different, in order for a receiving end to be able to acquire information transmitted on multiple spatial layers, a demodulation reference signal (DMRS) is configured differently for each antenna port to estimate a channel state between each antenna port and the terminal device, so as to obtain a channel coefficient between each antenna port and the terminal device. The DMRSs corresponding to different antenna ports can be multiplexed by adopting time division, frequency division, code division and other modes.

Generally, one DMRS port corresponds to one spatial layer. For Multiple Input and Multiple Output (MIMO) transmission with a transmission stream number (rank) of R, the number of DMRS ports required is R. The base station needs to indicate the number of layers it transmits and the occupied DMRS port position for each terminal device. Currently, in the industry, a fixed rank number is usually configured for a terminal device in a whole band, that is, the same rank number is configured for all subbands in the whole band, but in a data transmission process, the rank numbers occupied by the terminal device in different subbands are different, and such DMRS port configuration not only affects the flexibility of a communication system, but also causes waste of transmission resources.

Disclosure of Invention

The embodiment of the application provides a method and a device for indicating a demodulation reference signal DMRS port, which can improve the flexibility of a communication system and reduce the waste of transmission resources by indicating different rank numbers for different sub-bands and indicating the positions of corresponding number of DMRS ports for different sub-bands.

In a first aspect, a DMRS port indication method is provided, and includes: the method comprises the steps that network equipment determines a DMRS port set corresponding to a first sub-band, wherein the DMRS port set comprises a first DMRS port set, and the first DMRS port set corresponds to terminal equipment; the network equipment transmits first indication information, wherein the first indication information is used for indicating that the DMRS port set comprises M second DMRS port sets in the N second DMRS port sets, N and M are positive integers which are larger than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth also comprises a second sub-band, and the first sub-band is different from the second sub-band.

Based on the technical scheme, the network equipment determines a first DMRS port set corresponding to the first sub-band, and sends first indication information to the terminal equipment, wherein the first indication information is used for indicating M second DMRS port sets in the N second DMRS port sets, and both N and M are positive integers greater than or equal to 1. And the terminal equipment determines the received DMRS port set according to the first indication information. Therefore, the network device can indicate different DMRS port sets (rank numbers) for different subbands, thereby improving the flexibility of the communication system and reducing the waste of transmission resources.

It is to be understood that one sub-band includes one or more resource blocks in the frequency domain, or one sub-band may include one or more resource block groups in the frequency domain. Since each resource block group also includes a plurality of resource blocks, the size of one sub-band may be the same as or different from the size of one resource block group. A subband may also be understood as a resource block group when a subband is the same size as a resource block group.

With reference to the first aspect, in certain implementations of the first aspect, the set of DMRS ports further corresponds to the first bandwidth, the method further comprising: and the network equipment sends second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth. Based on the technical scheme, the network device can indicate the DMRS port set corresponding to the first bandwidth through the second indication information, and does not need to indicate the DMRS port set corresponding to the sub-band on each sub-band, so that signaling overhead can be saved.

With reference to the first aspect, in certain implementations of the first aspect, the second indication information is used to indicate an index value of each of the first set of DMRS ports and an index value of each of the N second sets of DMRS ports.

Based on the above technical solution, the network device can indicate, through the second indication information, the index value of each port in the DMRS port set corresponding to the first bandwidth. The index value of the port indicates resources occupied by the DMRS port, and the resources may be frequency domain resources, time-frequency resources, code domain resources, and the like. For each sub-band in the first bandwidth, the network equipment indicates the positions of part of the DMRS ports from the DMRS port set corresponding to the first bandwidth, and different sub-bands in the first bandwidth can correspond to different parts of the DMRS ports, so that the flexibility of a communication system is improved, and the signaling overhead is saved.

With reference to the first aspect, in certain implementations of the first aspect, N is equal to 1; the first indication information includes a first value indicating that the set of DMRS ports includes 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the first aspect, in certain implementations of the first aspect, N is equal to 1; the first indication information includes a second value (the second value being different from the first value) to indicate that the set of DMRS ports does not include 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the first aspect, in certain implementations of the first aspect, N is greater than 1; the first indication information includes a first value indicating that the set of DMRS ports includes M second sets of DMRS ports out of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the first aspect, in certain implementations of the first aspect, N is greater than 1; the first indication information includes a second value (the second value being different from the first value) indicating that the set of DMRS ports does not include M of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the first aspect, in certain implementations of the first aspect, M is equal to 1, and the method further includes: the network equipment sends third indication information which is

A bit to indicate 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

It is necessary to state that,

this symbol means rounded up, e.g. when N =3, then->

Rounded up value is 2, when N =7, then ^ h>

The upper rounded value is 3.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information and/or the third indication information are/is carried in a Group downlink control information Group DCI.

In a second aspect, a DMRS port indication method is provided, including: receiving, by a terminal device, first indication information indicating that a set of DMRS ports includes M second sets of DMRS ports out of N second sets of DMRS ports, the DMRS ports corresponding to a first sub-band, the DMRS ports including a first set of DMRS ports, the first set of DMRS ports corresponding to the terminal device; the terminal equipment determines the DMRS port set according to the first indication information; wherein, N and M are both positive integers greater than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth further includes a second sub-band, and the first sub-band is different from the second sub-band.

Based on the technical scheme, the terminal device receives first indication information, wherein the first indication information is used for indicating M second DMRS port sets in the N second DMRS port sets. And the terminal equipment determines the received DMRS port set according to the first indication information. Therefore, the network device can indicate different DMRS port sets (rank numbers) for different subbands, thereby improving the flexibility of the communication system and reducing the waste of transmission resources.

With reference to the second aspect, in certain implementations of the second aspect, the set of DMRS ports further corresponds to the first bandwidth, the method further comprising: and the terminal equipment receives second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth. Based on the technical scheme, the network device can indicate the DMRS port set corresponding to the first bandwidth of the terminal device through the second indication information, and does not need to indicate the DMRS port set corresponding to the sub-band on each sub-band, so that the signaling overhead can be saved.

With reference to the second aspect, in certain implementations of the second aspect, the second indication information is used to indicate an index value for each of the first set of DMRS ports and an index value for each of the N second sets of DMRS ports.

With reference to the second aspect, in certain implementations of the second aspect, N is equal to 1; the first indication information includes a first value indicating that the set of DMRS ports includes 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the second aspect, in certain implementations of the second aspect, N is equal to 1; the first indication information includes a second value (the second value being different from the first value) indicating that the set of DMRS ports does not include 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the second aspect, in certain implementations of the second aspect, N is greater than 1; the first indication information includes a first value indicating that the set of DMRS ports includes M second sets of DMRS ports of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the second aspect, in certain implementations of the second aspect, N is greater than 1; the first indication information includes a second value (the second value being different from the first value) indicating that the set of DMRS ports does not include M of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, so that the flexibility of a communication system is improved, and the waste of transmission resources is reduced.

With reference to the second aspect, in certain implementations of the second aspect, M is equal to 1, and the method further includes: the terminal equipment receives third indication information which is

A bit to indicate 1 of the N second sets of DMRS ports. Based on the technical scheme, the network equipment can indicate different DMRS port sets (rank numbers) for different sub-bands, thereby improving the flexibility of a communication system and reducing transmissionThe waste of the input resources.

With reference to the second aspect, in some implementation manners of the second aspect, the first indication information and/or the third indication information are/is carried in the intra-Group downlink control information Group DCI.

In a third aspect, a communication apparatus is provided, the apparatus comprising: the terminal equipment comprises a processing unit and a processing unit, wherein the processing unit is used for determining a DMRS port set corresponding to a first sub-band, the DMRS port set comprises a first DMRS port set, and the first DMRS port set corresponds to the terminal equipment; a transceiver unit, configured to send first indication information, where the first indication information is used to indicate that the DMRS port set includes M second DMRS port sets of the N second DMRS port sets, where N and M are positive integers greater than or equal to 1, the first subband belongs to a first bandwidth, and the first bandwidth further includes a second subband, where the first subband is different from the second subband.

With reference to the third aspect, in certain implementations of the third aspect, the set of DMRS ports further corresponds to the first bandwidth, and the transceiver unit is further configured to: and sending second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

With reference to the third aspect, in certain implementations of the third aspect, the second indication information is used to indicate an index value of each of the first set of DMRS ports and an index value of each of the N second sets of DMRS ports.

With reference to the third aspect, in certain implementations of the third aspect, N is equal to 1; the first indication information includes a first value indicating that the set of DMRS ports includes 1 of the N second sets of DMRS ports.

With reference to the third aspect, in certain implementations of the third aspect, N is equal to 1; the first indication information includes a second value (the second value being different from the first value) to indicate that the set of DMRS ports does not include 1 of the N second sets of DMRS ports.

With reference to the third aspect, in certain implementations of the third aspect, N is greater than 1; the first indication information includes a first value indicating that the set of DMRS ports includes M second sets of DMRS ports of the N second sets of DMRS ports.

With reference to the third aspect, in certain implementations of the third aspect, N is greater than 1; the first indication information includes a second value (the second value is different from the first value) to indicate that the set of DMRS ports does not include M of the N second sets of DMRS ports.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: m equals 1, the transceiver unit further configured to: sending third indication information, wherein the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

With reference to the third aspect, in some implementation manners of the third aspect, the first indication information and/or the third indication information are/is carried in intra-Group downlink control information Group DCI.

In a fourth aspect, there is provided a communication apparatus, the apparatus comprising: a transceiver unit, configured to receive first indication information, where the first indication information is used to indicate that the DMRS port set includes M second DMRS port sets of the N second DMRS port sets, the DMRS port sets corresponding to the first subband, the DMRS port sets include a first DMRS port set, and the first DMRS port set corresponds to the terminal device; a processing unit, configured to determine the DMRS port set according to the first indication information; wherein, N and M are positive integers greater than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth further comprises a second sub-band, and the first sub-band is different from the second sub-band.

With reference to the fourth aspect, in some implementations of the fourth aspect, the set of DMRS ports further corresponds to the first bandwidth, the transceiver unit further configured to: and receiving second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the second indication information is used to indicate an index value of each of the first set of DMRS ports and an index value of each of the N second sets of DMRS ports.

With reference to the fourth aspect, in certain implementations of the fourth aspect, N is equal to 1; the first indication information includes a first value indicating that the set of DMRS ports includes 1 of the N second sets of DMRS ports.

With reference to the fourth aspect, in certain implementations of the fourth aspect, N is equal to 1; the first indication information includes a second value (the second value being different from the first value) indicating that the set of DMRS ports does not include 1 of the N second sets of DMRS ports.

With reference to the fourth aspect, in certain implementations of the fourth aspect, N is greater than 1; the first indication information includes a first value indicating that the set of DMRS ports includes M second sets of DMRS ports of the N second sets of DMRS ports.

With reference to the fourth aspect, in certain implementations of the fourth aspect, N is greater than 1; the first indication information includes a second value (the second value is different from the first value) to indicate that the set of DMRS ports does not include M of the N second sets of DMRS ports.

With reference to the fourth aspect, in some implementations of the fourth aspect, M is equal to 1, and the transceiver unit is further configured to: receiving third indication information which is

A bit to indicate 1 of the N second sets of DMRS ports.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first indication information and/or the third indication information are/is carried in intra-Group downlink control information Group DCI.

In a fifth aspect, there is provided a network device, the apparatus comprising at least one processor configured to perform the method of the first aspect above or any possible implementation manner of the first aspect, and an interface circuit.

In a sixth aspect, there is provided a terminal device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of the second aspect above or any possible implementation manner of the second aspect.

In a seventh aspect, a computer program product is provided, the computer program product comprising a computer program for performing the method of the first aspect or any possible implementation manner of the first aspect, or for performing the method of the second aspect or any possible implementation manner of the second aspect, when the computer program is executed by a processor.

An eighth aspect provides a computer readable storage medium having stored thereon a computer program for performing the method of the first aspect or any possible implementation form of the first aspect, or for performing the method of the second aspect or any possible implementation form of the second aspect, when the computer program is executed.

In a ninth aspect, a chip system is provided, the chip system comprising: a processor for calling and running the computer program from the memory so that the communication device on which the chip system is installed performs the method of any of the possible implementations of the first aspect or performs the method of any of the possible implementations of the second aspect.

A tenth aspect provides a communication system comprising the communication apparatus of any one of the possible implementations of the third aspect or the communication apparatus of any one of the possible implementations of the fourth aspect.

Drawings

Fig. 1 is a schematic diagram of a scenario suitable for a method provided in an embodiment of the present application.

Fig. 2 is a diagram illustrating an example of a DMRS pattern in a 5G system.

Fig. 3 is a schematic flow chart of an embodiment provided herein.

Fig. 4 is a schematic flow chart of yet another embodiment provided herein.

Fig. 5 is a diagram illustrating an example of wideband DMRS port allocation and narrowband DMRS port indication provided in this application.

Fig. 6 is a schematic diagram of another example of wideband DMRS port allocation and narrowband DMRS port indication provided by the present application.

Fig. 7 is a schematic diagram of another example of wideband DMRS port allocation and narrowband DMRS port indication provided by the present application.

Fig. 8 is a schematic diagram of another example of wideband DMRS port allocation and narrowband DMRS port indication provided by the present application.

Fig. 9 is a schematic diagram of another example of wideband DMRS port allocation and narrowband DMRS port indication provided by the present application.

FIG. 10 is a schematic block diagram of yet another embodiment provided herein.

FIG. 11 is a schematic block diagram of yet another embodiment provided herein.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) systems, general Packet Radio Service (GPRS), long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5 g) or new radio NR systems, etc.

For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 101 shown in fig. 1. The communication system 100 may further comprise at least one terminal device, such as the terminal devices 102 to 107 shown in fig. 1. The terminal devices 102 to 107 may be mobile or stationary. Network device 101 and one or more of terminal devices 102-107 may each communicate over a wireless link. Each network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area.

Alternatively, the terminal devices may communicate directly with each other. Direct communication between terminal devices may be achieved, for example, using device to device (D2D) technology or the like. As shown in fig. 1, direct communication may be performed between

terminal devices

105 and 106 and between

terminal devices

105 and 107 using D2D technology.

Terminal devices

106 and 107 may communicate with terminal device 105 separately or simultaneously.

The terminal apparatuses 105 to 107 can also communicate with the network apparatus 101, respectively. For example, it may communicate directly with network device 101, such as

terminal devices

105 and 106 in the figure may communicate directly with network device 101; it may also communicate with the network device 101 indirectly, such as terminal device 107 communicating with the network device 101 via terminal device 106.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. The network devices include, but are not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP), a Wireless relay Node, a Wireless backhaul Node, a Transmission Point (TP), or a Transmission and Reception Point (TRP) in a Wireless Fidelity (WIFI) system, and the like, and may also be 5G, such as NR, a gbb in a system, or a transmission point (TRP or TP), and one or a group of base stations in a 5G system may include multiple antennas, or panels, such as a Radio Network Controller (RNC), a distributed Node B, or a Base Band Unit (BBU).

In some deployments, the gNB may include Centralized Units (CUs) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes the information of the PHY layer or is converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, can also be considered to be transmitted by the DU or by the DU + CU. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application 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 (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

Before describing the embodiments of the present application, a few concepts related to the embodiments of the present application will be briefly described.

Wireless or limited local area network access is provided to end users through indoor or outdoor Customer Premises Equipment (CPE) by Fixed Wireless Access (FWA) networks relying on LTE and 5G NR technology. The CPE can provide a variety of services to end users, such as internet, landline, television, smart home, and the like. For FWA scenarios, downlink communication from a network device to a CPE is usually mainly based on large data packet transmission, and a base station needs to schedule more spectrum resources for the CPE to meet the rate requirement. In particular, for an indoor FWA scenario, since there are many indoor obstacles and multipath effects are severe, there is a strong frequency selective fading of the channel.

In the 5G NR system and the LTE system, an Orthogonal Frequency Division Multiple Access (OFDMA) system is generally used as a multiple access scheme. The ofdma is mainly characterized in that transmission resources are divided into orthogonal time-frequency Resource Elements (REs), signals transmitted by a transmitting end are all carried on the REs and transmitted to a receiving end, and the different REs are orthogonal to each other, so that the receiving end can independently receive the signals transmitted by each RE. In consideration of the fading characteristics of the wireless channel, the signal carried on the RE will generate distortion after passing through the channel, and the channel distortion is usually referred to as channel coefficient. In order to recover a received signal, a receiving end needs to estimate a channel coefficient, and a process of obtaining channel information by the receiving end may also be referred to as channel estimation.

In an existing wireless communication system, a base station is equipped with multiple antennas to implement spatial multiplexing transmission using multiple-input multiple-output (MIMO) technology, that is, multiple data streams are transmitted on the same time-frequency resource, each data stream is transmitted on an independent spatial layer, and each spatial layer is to be mapped to a different antenna port for transmission. Considering that channel coefficients from different antenna ports to terminal devices are different, in order for a receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficient between each antenna port and the terminal, so that it is necessary to configure different DMRSs for each antenna port, and DMRSs corresponding to different antenna ports may be multiplexed in time division, frequency division, code division, and other manners. Illustratively, as shown in fig. 2, the total number of DMRS ports is 6, and the number of cdm groups is 3. Wherein, the horizontal direction represents a time domain, the vertical direction represents a frequency domain, each small square represents an RE, where

DMRS ports

0 and 1 are multiplexed by orthogonal codes, so the REs corresponding to the two ports are also called a Code Division Multiplexing (CDM) group.

1. Subcarrier: in a communication system using Orthogonal Frequency Division Multiplexing (OFDM) technology, a frequency domain resource is divided into a plurality of sub-resources, and each sub-resource in the frequency domain may be referred to as a sub-carrier. A subcarrier can also be understood as a minimum granularity of frequency domain resources. The OFDM technique is a multi-carrier modulation technique.

2. Subcarrier spacing: in a communication system using the OFDM technique, the value of the interval between the center positions or peak positions of two subcarriers adjacent to each other in the frequency domain is calculated. For example, the subcarrier spacing in the LTE system is 15kHz, the subcarrier spacing in the NR system in the 5G system may be 15kHz, or 30kHz, or 60kHz, or 120kHz, or the like.

3. Resource Block (RB): the N subcarriers consecutive in the frequency domain may be referred to as one resource block. For example, one resource block in the LTE system includes 12 subcarriers, and one resource block in the NR system in 5G also includes 12 subcarriers. As the communication system evolves, the number of subcarriers included in a resource block may be other values.

4. Time unit: the time unit is a time domain concept or a unit in a time domain, and may be one or more subframes, one or more slots, or one or more OFDM time symbols, where, for example, in a 5G NR system, the slot length is 1ms, and the slot length corresponding to a subcarrier interval of 30khz is 0.5ms. An OFDM time symbol may also be referred to as a symbol for short, which is a time unit in the OFDM system with the symbol as the minimum in the time domain.

5. Time-frequency resource unit: the minimum time-frequency resource granularity in the OFDM system is an OFDM symbol in the time domain and a subcarrier in the frequency domain.

6. Sub-band: one sub-band includes one or more resource blocks in the frequency domain, or one sub-band may include one or more resource block groups in the frequency domain. Since each resource block group also includes a plurality of resource blocks, the size of one sub-band may be the same as or different from the size of one resource block group. A subband may also be understood as a resource block group when a subband is the same size as a resource block group.

7. Antenna port: in the 5G NR system, antenna ports are logical ports for transmission, and one antenna port includes a plurality of physical antennas. From the perspective of the receiving end, each antenna port corresponds to an independent wireless channel.

8. Spatial layer: in the existing wireless communication system, a base station is equipped with multiple antennas to implement spatial multiplexing transmission by using MIMO technology, that is, multiple different data streams are transmitted on the same time-frequency resource, each unrelated data stream is transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission.

9. Resource block group: one or more resource blocks constitute a Resource Block Group (RBG). The size of the RBG is configured by high-level parameters in the 5G NR. Note that the size of an RBG mentioned in the present application is understood as the number of resource blocks included in the RBG, and the size of a certain frequency domain resource mentioned in the present application is also understood as the number of RBs included in the frequency domain resource. A resource block group included in a certain frequency domain resource, or a resource block group in a first resource block group or a first resource block group included in a certain frequency domain resource, may be understood as a unit resource block group in the frequency domain resource.

10. Partial Bandwidth (BWP): which may also be referred to as a bandwidth portion, a terminal device may be configured with a portion of the frequency domain resources in the carrier for data transmission in the 5G NR, instead of requiring all of the frequency domain resources in the carrier.

11. type0 and type1 resource allocation

The downlink data channel supports two types of frequency domain resource allocation: type0 type and type1 type. Wherein type0 type is discontinuous frequency domain resource allocation, and type1 type is continuous frequency domain resource allocation. In order to support the flexibility of the location and number of the scheduled frequency domain resources, downlink Control Information (DCI) can dynamically indicate the frequency domain resource allocation type used for the scheduled PDSCH transmission (when the parameter resource allocation in the higher layer signaling PDSCH-configuration is set to dynamic), at which time the highest bit in the DCI intermediate frequency domain resource allocation information field is used to indicate the frequency domain resource allocation type used for the PDSCH transmission scheduled by the current DCI. In addition, the frequency domain resource allocation used by the PDSCH can also be directly determined by the higher layer signaling parameter, resource allocation.

Specifically, type0 type indicates the resource block group allocated to the PDSCH in BWP by a bitmap or bitmap, and type1 type indicates the resource block group allocated to the PDSCH in BWP with consecutive numbers by RIV. When interleaving mapping is employed, resource blocks may be understood as consecutively numbered virtual resource blocks. RIV is used to indicate the starting resource block number RB allocated to the UE PDSCH _start And length L of allocated consecutive resource blocks _RBs . In the existing 3GPP standard TS 38.214, the calculation formula of RIV is as follows:

if it is not

Then->

If not, then,

12. demodulation reference signal: reference signals that may be used for demodulation of data or signaling. According to different transmission directions, the method can be divided into an uplink demodulation reference signal and a downlink demodulation reference signal. The demodulation reference signal may be DMRS in LTE protocol or NR protocol, or may also be other reference signals defined in future protocols for implementing the same or similar functions. In LTE or NR protocols, DMRS may be carried in a physical shared channel and transmitted with data signals for demodulating the data signals carried in the physical shared channel. For example, the downlink data is transmitted together with the Physical Downlink Shared Channel (PDSCH) or the uplink data is transmitted together with the Physical Uplink Shared Channel (PUSCH). The DMRS may also be carried in a physical control channel and transmitted together with the control signaling, so as to demodulate the control signaling carried in the physical control channel aggregate. For example, the downlink control signaling is transmitted together with a Physical Downlink Control Channel (PDCCH) or the uplink control signaling is transmitted together with a Physical Uplink Control Channel (PUCCH). In the embodiment of the present application, the demodulation reference signal may include a downlink demodulation reference signal transmitted through a PDCCH or a PDSCH, and may also include an uplink demodulation reference signal transmitted through a PUCCH or a PUSCH. Also, for convenience of explanation, the demodulation reference signal is hereinafter simply referred to as DMRS.

In LTE and NR protocols, DMRS may employ pseudo-random (PN) sequences, and thus, may also be referred to as DMRS sequences. In the embodiments of the present application, "DMRS" and "DMRS sequence" may be used interchangeably, and the intended meanings thereof are consistent when the differences are not emphasized.

The DMRS sequence may be composed of a plurality of modulation symbols. The modulation symbols may be, for example, quadrature Phase Shift Keying (QPSK) symbols. The modulation symbol r (n) carried on the nth subcarrier can be obtained by formula one shown below:

wherein, the form presented by r (n) is a complex form obtained by modulating the PN sequence, i.e. a modulation symbol, which is hereinafter referred to as a symbol. n denotes an nth subcarrier among subcarriers occupied by a DMRS among Component Carriers (CCs),

d represents the density of the DMRS on one RB and one OFDM symbol>

May represent the number of RBs included in one CC. c (i) denotes an initial value c _init A defined PN sequence.

Initial value c _init This can be further obtained from equation two shown below:

wherein, l denotes the l-th OFDM symbol within one slot,

indicates the number of time slots in a frame, and->

Indicating the number of OFDM symbols in one slot. Sequence identification->

Initial value c that can be used to generate DMRS sequences _init . Scrambling code identification n _SCID The method can be used for indicating DMRS sequence scrambling code generation information.

In NR, n _SCID May be indicated by Downlink Control Information (DCI),

may be indicated by higher layer parameters. For example, when the terminal device receives DCI of format (format) 1_1, the DCI may include a flag indicating the n _SCID An indication field of the value of. In NR, the n _SCID The value of (1) can be 0 or 1, and can be used for downlink transmission; n can be respectively configured by a high-layer parameter scrambling code identification 0 (scrambling code ID 0) and a scrambling code identification (scrambling code ID 1) in an Information Element (IE) of DMRS downlink configuration (DMRS-DownlinkConfig) _SCID In a value of 0 or 1 respectively>

The value of (c). In NR, is>

For another example, when the terminal device receives DCI of format 1_0, the n may be implicitly indicated _SCID Is 0, and the value of n is _SCID Can be used for downlink transmission. Higher layer parameter scramblingID0 configurable n in DMRS-DownlinkConfig IE _SCID When (a) is 0

The value of (c). In NR, <' >>

For another example, when the terminal device receives DCI of format 0_1, n for uplink transmission may be determined _SCID Is 0 or 1, and the high-level parameters can be respectively configured with n _SCID When (b) is 0 or 1 respectively

The value of (c). In the case of the NR, the group,

also for example, when the terminal device receives DCI of format 0_0, n for uplink transmission may be determined _SCID Is 0, the high level parameter can be configured with n _SCID When (a) is 0

The value of (c). In NR, is>

When the terminal device does not receive the listed DCI, the terminal device can default to the DCI

Is a cell identification->

It can be seen that n _SCID And

n used by DMRS transmitted to different terminal devices, in most cases at UE specific _SCID And &>

May be the same or different.

13. Two DMRS pilot types supported by NR: DMRS Type1 Type and DMRS Type2 Type. The DMRS Type1 Type comprises two CDM groups, and when a single symbol DMRS is adopted, at most 4 DMRS ports are supported, wherein 2 DMRS ports are supported inside each CDM group in a frequency domain code division multiplexing mode for multiplexing; when the dual-symbol DMRS is adopted, at most 8 DMRS ports are supported, wherein each CDM group supports 4 DMRS port multiplexing in a time domain and frequency domain code division multiplexing mode. The DMRS Type2 Type comprises 3 CDM groups, when a single symbol DMRS is adopted, at most 6 DMRS ports are supported, and 2 DMRS port multiplexing is supported in each CDM group in a frequency domain code division multiplexing mode; when the dual-symbol DMRS is adopted, at most 12 DMRS ports are supported, and 4 DMRS ports are supported in each CDM group in a time domain and frequency domain code division multiplexing mode.

Currently, in the industry, a fixed Rank number (also called a number of layers or a number of streams) is generally configured for a terminal device in a full band, and a fixed DMRS port resource is occupied in the full band, however, in a data transmission process, the Rank number occupied by the terminal device is not exactly the same in different subbands, for example, a network device configures 3 streams in a subband, but the terminal device only uses 2 streams. Therefore, such DMRS port configuration may not only affect the flexibility of the communication system, but also cause waste of transmission resources.

Based on the method, the network equipment configures different Rank numbers for different sub-bands and indicates that the different Rank numbers are used in the different sub-bands, so that the flexibility of a communication system is improved, and the waste of resources is reduced.

Embodiments of the present application will be described in detail below with reference to the following drawings.

Fig. 3 is a schematic flow chart of an indication method of a DMRS port provided by the present application, and the method includes at least the following steps.

S310, the network equipment determines a DMRS port set corresponding to the first sub-band, wherein the DMRS port set comprises a first DMRS port set, and the first DMRS port set corresponds to the terminal equipment.

In particular, the first DMRS port set may be port set α _n The first DMRS port set corresponds to the terminal device, which may be understood as the port set α _n Corresponding to the terminal device. Illustratively, UE1 corresponds to a port set α ₁ UE2 corresponding port set α ₂ UE3 corresponding Port set α ₃ 。

It should be noted that each port set α _n In which is p _n A port (port), where p _n Is greater than or equal to 1. For example, port set α ₁ In which is p ₁ One port, a set of ports α ₂ In the presence of p ₂ Port, port set α ₃ In the presence of p ₃ And a plurality of ports. It should be understood that, in the embodiment of the present application, the port set α is described above _n Number of ports p in _n May be the same or different, i.e. p ₁ 、p ₂ 、p ₃ May be the same or different.

It should be understood that, in the embodiment of the present application, each port set α _n Do not overlap.

It should be understood that the above correspondence may be configured in advance by the network device, or may be specified by a protocol, and the embodiment of the present application is not described herein again.

S320, the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating that the DMRS port set comprises M second DMRS port sets in the N second DMRS port sets. Wherein, N and M are both positive integers greater than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth further includes a second sub-band, and the first sub-band is different from the second sub-band.

And S330, the terminal equipment determines the DMRS port set according to the first indication information.

Specifically, the first indication information indicates that the DMRS port set includes N port sets β _n M port sets β of _m . Illustratively, the first indication information indicates that the DMRS port set includes N port sets β _n M of (2) _m It may be understood that the first indication information indicates that the DMRS port set includes the port set β ₁ 、β ₂ 、β ₃ ……β _n M port sets, wherein the mth port set is β _m . And the terminal equipment determines the DMRS port set corresponding to the first sub-band according to the first indication information.

It should be noted that each port set β _n In which is q _n A port, q _n Greater than or equal to 1. For example, port set β ₁ In which is q ₁ Port, port set beta ₂ In which is q ₂ Port, port set beta ₃ In the presence of q ₃ And a plurality of ports. It should be understood that, in the embodiment of the present application, the port set β is described above _n Number of ports q in (1) _n May be the same or different, i.e. q ₁ 、q ₂ 、q ₃ May be the same or different.

It should be understood that in the embodiment of the present application, each port set β _n Do not overlap.

It should be understood that the first indication information may be Downlink Control Information (DCI), or may also be a medium access control element (MAC CE), or may also be Radio Resource Control (RRC) signaling, or may also be a Physical Downlink Control Channel (PDCCH), and the embodiment of the present invention is not limited herein.

It will be appreciated that the first sub-band may also be described as sub-band i and the second sub-band may also be described as sub-band i +1, where i is a positive integer. In this application, a full band is divided into multiple sub-bands in frequency, for example, sub-band 1, sub-band 2, \8230, sub-band i +1, etc., and since the channel condition of each sub-band may be different, a network device needs to configure different port numbers for different sub-bands and indicate the specific positions of the ports. For convenience of description, in the following embodiments, the first subband is represented by subband i.

Optionally, in a possible implementation, the method includes: and S340, the network equipment sends second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth. Specifically, the second indication information is used to indicate an index value of each DMRS port in the first set of DMRS ports and an index value of each DMRS port in the N second sets of DMRS ports.

And S350, the terminal equipment determines the position of each DMRS port in the DMRS port set according to the second indication information.

For each terminal device UEn, the network device indicates the DMRS port set corresponding to the first bandwidth, that is, the port set α, through the second indication information _n And N port sets beta _n . Wherein each port set alpha _n In which is p _n A port (port) where p _n Greater than or equal to 1. For example, port set α ₁ In which is p ₁ Port, port set α ₂ In which is p ₂ Port, port set α ₃ In which is p ₃ And (4) a port. Each port set beta _n In which is q _n A port, q _n Greater than or equal to 1. For example, port set β ₁ In which is q ₁ Port, port set beta ₂ In the presence of q ₂ One port, port set beta ₃ In which is q ₃ And (4) a port.

Specifically, the second indication information is used for indicating the first DMRS port set α _n Index value of each DMRS port and N second sets of DMRS ports beta _n Index value of each DMRS port.

Illustratively, with port set α _n For example, in the first bandwidth, the network device sends the second indication information if the port set α is ₁ Only 1 port (port) in the index table, at this time, the second indication information indicates an index value corresponding to port 1; if the port set alpha ₁ In which there are 3 ports (p) ₁ = 3), at this time, the second indication information indicates index values corresponding to port1, port2, and port 3. And the terminal equipment can acquire the position of the port in each port set according to the index value of each port indicated by the second indication information under the first bandwidth.

It should be understood that the second indication information may be carried in DCI, or may also be carried in MAC CE, or may also be carried in RRC signaling, or may also be carried in PDCCH, which is not limited herein.

It should be understood that the first bandwidth may also be described as a full band, and the embodiments of the present application are not limited thereto.

It should also be understood that the second indication information may be an indication information D ₁ Or a plurality of indication information d _n That is, it may be the indication information D ₁ Unified pointing port set alpha _n And beta _n An index value for each port in; or, the plurality of indication information may indicate the port sets α respectively _n And beta _n The index value of each port in the application, and the embodiments of the application are not limited herein.

Based on the technical scheme, the network device indicates the port set corresponding to the first bandwidth and the index value of the port (port) in the port set, and does not need to send indication information indicating the port position to the terminal device in each sub-band, so that signaling overhead can be saved.

Optionally, in a possible implementation, when N is equal to 1, the first indication information includes a first value for indicating that the DMRS port set includes 1 of the N second DMRS port sets.

Specifically, if the network device sends the first indication information (e.g., bit information b) to the terminal device UEn for the sub-band i _n,i ) If bit information b _n,i When the value is a first value (e.g., the first value is 0), 1 port set β is indicated _n 1 port set in the network. Then the terminal device determines that the received DMRS port set includes a port set α corresponding to the UEn according to the value of the first indication information as the first value _n And 1 port set beta _n Of the above.

Exemplarily, taking UE1 as an example, when N is equal to 1, assume that the first indication information (bit information b) _1,i ) Taking the value as a first value and indicating 1 port set beta ₁ That is, terminal device UE1 determines, for subband i, that the receiving DMRS port set includes its corresponding port set α ₁ And port set beta ₁ 。

Specifically, if the network device sends the first indication information (e.g., bit information b) to the terminal device UEn for the sub-band i _n,i ) If bit information b _n,i When the value is not the first value, 1 port set beta is indicated _n 0 of (3). Then, when the terminal device determines that the value of the first indication information is a second value (for example, the second value is 1), that is, the value is not the first value, it determines that the DMRS port set received by the terminal device only includes the port set α corresponding to the UEn _n 。

Exemplarily, taking UE1 as an example, when N is equal to 1, assume that the first indication information (bit information b) _1,i ) When the value is a second value, indicating the port set beta ₁ 0, i.e. does not indicate port set β ₁ Then the terminal equipment UE1 is directed to the sub-bandi determine that a receiving DMRS port set includes only its corresponding port set a ₁ 。

Optionally, in one possible implementation, when N is greater than 1, the first indication information (e.g., bit information b) _n,i ) A first value is included to indicate that the set of DMRS ports includes M of the N second sets of DMRS ports.

Specifically, if the network device sends the first indication information (e.g., bit information b) to the terminal device UEn for subband i _n,i ) If bit information b _n,i When the value is a first value (e.g., the first value is 0), N port sets β are indicated _n M port sets, where M is greater than or equal to 1. At this time, the terminal device determines that the received DMRS port set includes a port set α corresponding to the UEn according to the value of the first indication information as the first value _n And N port sets beta _n M port sets.

In one possible implementation, when N is greater than 1 and m is equal to 1, the method further includes: the network equipment sends third indication information which is

Bit for indicating N port sets beta _n 1 port set. Exemplarily, when N =4, the third indication information is 2 bits, and is used for indicating 4 port sets β _n 1 of (2). As shown in table 1, the value of the third bit information and the port set β _n The correspondence of (3) is as follows.

Assuming that the value of the third bit information received by the UE1 is "01", at this time, the UE1 receives the port set α for the subband i ₁ And beta ₂ (ii) a Assuming that the third bit information received by UE2 takes the value of "11", at this time, UE2 receives port set α for subband i ₂ And beta ₄ 。

TABLE 1

Third bit information	Set of ports betan
		00	β ₁
01	β ₂
		10	β ₃
11	β ₄

Optionally, in one possible implementation, when N is greater than 1, the first indication information (e.g., bit information b) _n,i ) And when the value is the second value, namely the value is not the first value, the value is used for indicating 0 second DMRS port sets in the N second DMRS port sets.

Specifically, if the network device sends the first indication information (e.g., bit information b) to the terminal device UEn for the sub-band i _n,i ) If bit information b _n,i When the value is a second value, indicating N port sets beta _n 0 of (3). Then, the terminal device determines that the DMRS port set received by the terminal device only includes the port set α corresponding to the UEn according to that the value of the first indication information is the second value, that is, the value is not the first value _n 。

Optionally, in a possible implementation manner, the first indication information or the third indication information is carried in the Group downlink control information Group DCI.

The embodiments provided in the present application are described in detail below with reference to several figures. Fig. 4 is a schematic flow chart of a DMRS port indication method provided in an embodiment of the present application, where the method includes at least the following steps.

S410, the network equipment determines the DMRS port set corresponding to the sub-band i. Similar to S310, the present application is not described in detail for simplicity.

S420, the network equipment sends first indication information, and the first indication information indicates that the DMRS port set comprises 1 of N second DMRS port sets, wherein N is equal to 1.

And S430, the terminal equipment determines a DMRS port set according to the first indication information.

Specifically, when N is equal to 1, the first indication information indicates that the DMRS port set includes the port set β.

It should be noted that there are q ports in each port set β, and q is greater than or equal to 1. For ease of understanding, the following description will take 1 port in the port set β as an example.

When N is equal to 1, the network equipment determines that the DMRS port set corresponding to the sub-band i comprises a DMRS port set alpha _n And 1 port set beta. That is, for each of the N UEs, the network device allocates a port set α corresponding to the UE for the UE _n And 1 port set beta.

In one possible implementation, the network device sends first indication information (bit information b) to the terminal device for subband i _n,i ) If bit information b _n,i When the value is a first value (for example, the first value is 0), 1 port set β is indicated ₁ . The terminal device then bases on the received bit information b _n,i Is a first value, and determines that the received DMRS port set comprises a port set alpha corresponding to the terminal equipment _n And a port set beta.

In another possible implementation, the networkDevice sends bit information b to terminal device for subband i _n,i If bit information b _n,i When the value is the second value (for example, the second value is 1), 1 port set β is not indicated. The terminal device then determines from the received bit information b _n Is not a first value, and the DMRS port set received by the DMRS port set is determined to only comprise the port set alpha corresponding to the DMRS port set _n And not port set beta.

Illustratively, if UE1 receives b _n,i Is 0, that is, the first value, then UE1 except receiving the port set α corresponding to it ₁ In addition, a port set β is also received; if b is received by UE2 and UE3 _n,i If the value of (a) is 1, that is, not the first value, then both UE2 and UE3 only receive the port set α corresponding thereto ₂ And alpha ₃ The port set β is not received.

If b is received by UE1 and UE2 _n,i If the value of (a) is 1, that is, not the first value, then both UE1 and UE2 only receive the port set α corresponding thereto ₁ And alpha ₂ No port set β is received; if b is received by UE3 _n,i Is 0, i.e. the first value, then UE3 receives the port set α corresponding to it except for the port set α corresponding to it ₃ In addition, a port set β is also received.

It should be understood that, in the embodiment of the present application, the value of the first value "0" is merely an example, and the present application is not limited thereto.

S440, the network device sends second indication information, where the second indication information indicates the port set α corresponding to the first bandwidth _n And the position (index value) of each port in β.

S450, the terminal equipment determines the position of each DMRS port in the DMRS port set according to the second indication information.

It should be noted that S440-S450 are similar to S340-S350, and are not described herein for brevity.

Illustratively, taking N =1,m =1 as an example, fig. 5 shows a case where 3 UEs compete for wideband DMRS port allocation of 1 group port set β and narrowband DMRS port indication of subband i, as shown in fig. 5, assuming port set α ₁ Therein is provided with3 ports, port set α ₂ And alpha ₃ There are 2 ports and the port set β has 1 port.

As shown in (a) of fig. 5, the second indication information indicates the port set α ₁ The index values of the ports in (1) are #0, #1, #2, and the port set alpha ₂ The index values of ports in (1) are #4, #5, and the port set α ₃ The index values of the ports in port set β are #6, #7, and the index values of the ports in port set β are #3.

As shown in fig. 5 (b), if bit information b is received by UE1 _n,i Is taken to be 0, the ue1 receives the port set alpha corresponding to it ₁ And a port set beta, wherein the UE1 uses ports with index values of #0 to # 3; if bit information b is received by UE2 and UE3 _n,i When the value of (1) is obtained, the UE2 receives the port set alpha ₂ In this case, UE2 uses ports with index values #4 and #5, and UE3 receives α ₃ At this time, UE3 uses ports with index values #6 and # 7.

As shown in fig. 5 (c), if bit information b is received by UE1 and UE2 _n,i When the value of (3) is 1, the UE1 receives the port set α ₁ In this case, UE1 uses ports having index values #0 to #2, and UE2 receives the port set α ₂ UE2 now uses ports with index values #4 and # 5; if bit information b is received by UE3 _n,i Is taken as 0, the ue3 receives the port set alpha corresponding to it ₃ And port set β, when UE3 uses ports with index values #3, #6, and # 7.

It should be understood that the second indication information in (a) of fig. 5 indicates the position (index value) of the port only for illustration, i.e., the second indication information may also indicate the port set α ₁ The middle port position is other index values (e.g., #4, #5, # 6), which is not limited in this embodiment.

It should also be understood that the second indication information may be an indication information D ₁ Or a plurality of indication information d _n That is, it may be the indication information D ₁ Unified indication port set alpha _n And an index value for each port in β; alternatively, the indication information may be a plurality of indication information, for example, indication information d ₁ Indication of alpha ₁ Each of (1)Index value of a port, indication information d ₂ Indication of alpha ₂ Index value of each port of (1), indication information d ₃ Indication of alpha ₃ Index value of each port of (1), indication information d ₄ An index value of each port of β is indicated, and embodiments of the present application are not limited herein.

Based on the method, the network equipment indicates the number of the ports used by the terminal equipment in different sub-bands (sub-band i) through the first indication information, so that the flexibility of the communication system can be improved, and the waste of resources can be reduced. The network device can save signaling overhead by indicating the port set under the first bandwidth and the position (index value) of each port in the port set through the second indication information.

Fig. 6 shows a schematic flow diagram of a DMRS port indication method of a further embodiment provided herein, the method at least including the following steps.

S610, the network equipment determines the DMRS port set corresponding to the sub-band i. Similar to S310, the present application is not described in detail for simplicity.

S620, the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating that the DMRS port set comprises M second DMRS port sets in the N second DMRS port sets, at this time, N is greater than 1, and M is greater than or equal to 1.

And S630, the terminal equipment determines the DMRS port set according to the first indication information.

Illustratively, the first indication information indicates that the DMRS port set includes N port sets β _n M of (2) _m It may be understood that the first indication information indicates that the DMRS port set includes the port set β ₁ 、β ₂ 、β ₃ ……β _n M port sets in (b), wherein the mth port set is β _m . And the terminal equipment determines a DMRS port set corresponding to the sub-band i according to the first indication information.

It should be noted that each port set β _n In the presence of q _n A port, q _n Greater than or equal to 1. For example, port set β ₁ In which is q ₁ One port, port set beta ₂ In which is q ₂ A port, a portSet of beta ₃ In which is q ₃ And (4) a port. It should be understood that, in the embodiment of the present application, the port set β is described above _n Number of ports q in (1) _n May be the same or different, i.e. q ₁ 、q ₂ 、q ₃ May be the same or different.

In one possible implementation, the network device sends the first indication information (bit information b) to the terminal device for subband i _n,i ) If bit information b _n,i When the value is a first value (e.g., the first value is 0), N port sets β are indicated _n M of (1). The terminal device then determines from the received bit information b _n,i Is a first value, and determines that the received DMRS port set comprises a port set alpha corresponding to the terminal equipment _n And a set of M ports beta _m And M is 1 or more.

In another possible implementation, the network device sends bit information b to the terminal device for subband i _n,i If bit information b _n,i When the value is the second value (for example, the second value is 1), the N port sets β are indicated _n 0 of (3). The terminal device then bases on the received bit information b _n Is not the first value, and the DMRS port set received by the DMRS port set is determined to only comprise the port set alpha corresponding to the DMRS port set _n 。

And S640, when the M is equal to 1, the network device sends third indication information to the terminal device, wherein the third indication information is used for indicating 1 second DMRS port in the N second DMRS port sets.

Specifically, the third indication information may be

A bit to indicate 1 of the N second sets of DMRS ports.

Exemplarily, taking N =4 as an example, the terminal device receives the third indication information (bit information c) _n,i ) The number of the terminal equipment is 2 bits, and the terminal equipment determines that the terminal equipment is N port sets beta according to the value of the third indication information _n Which one of them. TABLE 2bit information c _n,i And port set beta _n The corresponding relationship of (1).

TABLE 2

Bit information c _n,i	Set of ports beta _n
		00	β ₁
01	β ₂
		10	β ₃
11	β ₄

Note that bit information c shown in Table 2 _n,i Value of and port set beta _n The corresponding relations in (b) are merely for illustration, and it should be understood that the embodiments of the present application are not limited thereto.

As shown in Table 2, if the bit information c received by UE1 _n,i Is "00", UE1 is instructed to receive port set β ₁ (ii) a If bit information c is received by UE2 _n,i To "10", UE2 is instructed to receive port set β ₃ (ii) a If bit information c is received by UE3 _n,i To "11", UE3 is instructed to receive port set β ₄ (ii) a If bit information c is received by UE4 _n,i Is "01", the UE4 is instructed to receive the port set beta ₂ 。

Therefore, the terminal device may determine the DMRS port set corresponding to the subband i according to the indication of the first indication information and the third indication information.

Illustratively, if the UE1 receives bit information b _n,i Is 0, that is, the first value, then UE1 except receiving the port set α corresponding to it ₁ In addition, 1 port set beta is received _n But is the set of N ports beta _n Which further indication of the third indication information is required. At this time, if the third indication information (bit information c) _n,i ) Is '00', the UE1 receives the port set β ₁ . Then UE1 determines that the corresponding DMRS port set for sub-band i includes port set alpha according to the first indication information and the third indication information ₁ And port set beta ₁ 。

If bit information b is received by UE2 and UE3 _n,i If the value of (a) is 1, that is, if the value of (b) is not the first value, then both UE2 and UE3 only receive the port set α corresponding to them ₂ And alpha ₃ Will not receive the N port sets beta _n Any one of the above. Then the UE2 determines that the corresponding DMRS port set for the sub-band i only includes the port set alpha according to the first indication information ₂ . The UE3 determines that the DMRS port set corresponding to the sub-band i only comprises the port set alpha according to the first indication information ₃ 。

It should be noted that the network device may not configure more than 1 terminal device to use the same port set β _n 。

In a possible implementation manner, the method may further include S650 and S660, S650, where the second indication information indicates the port set α corresponding to the first bandwidth _n And beta _n The location (index) of each port inValue).

And S660, the terminal equipment determines the position of each DMRS port in the DMRS port set according to the second indication information.

It should be noted that S650-S660 are similar to S340-S350, and are not described herein again for simplicity.

Exemplarily, in case of N =2,m =1, fig. 7 shows that 3 UEs compete for the port set β _n (β ₁ 、β ₂ ) The allocation of wideband DMRS ports for 1 port set in the sub-band i, and the narrowband DMRS ports for sub-band i. As shown in FIG. 7, assume a port set α ₁ 、α ₂ And alpha ₃ There are 2 ports in the set of ports, β ₁ And port set beta ₂ There are 1 port.

The second indication information indicates the port set alpha corresponding to the first bandwidth _n And beta _n The location (index value) of each port. As shown in (a) of fig. 7, the second indication information indicates the port set α ₁ The index value of the middle port position is #0, #1, and the port set alpha ₂ The index values of the middle port positions are #4, #5, and the port set alpha ₃ The index values of the middle port position are #6, #7, and the port set beta ₁ Has an index value of #2 for the port position in (1), and a port set β ₂ The index value in (2) is #3.

As shown in fig. 7 (b), if bit information b is received by UE1 and UE2 _n,i Is "0", that is, the first value, then UE1 and UE2 not only receive the corresponding port set α ₁ And alpha ₂ And also receives a port set beta _n (β ₁ 、β ₂ ) But specifically which port set, further indication of the third indication information is required. At this time, UE1 and UE2 receive the third indication information, where the third indication information is

bit (bit information c) _n,i 1 bit), the third indication information is used for indicating 2 port sets beta _n (β ₁ 、β ₂ ) Of the above. Illustratively, if the UE1 receives bit information c _n,i Is "0", thenIndicating UE1 receive port set beta ₁ Bit information c received by UE2 _n,i Is 1, indicating UE2 to receive port set beta ₂ . If the value of the first indication information received by the UE3 is "1", that is, not the first value, then the UE3 only receives the port set α corresponding to the first indication information ₃ Does not receive port set beta _n (β ₁ 、β ₂ ) Any one of the above.

As shown in fig. 7 (b), UE1 determines receiving port set α according to the first indication information and the third indication information ₁ And port set beta ₁ In this case, UE1 uses ports with index values #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information and the third indication information ₂ And port set beta ₂ In this case, UE2 uses ports having index values #3 to # 5. UE3 determines receiving port set alpha according to the first indication information ₃ At this time, UE3 uses ports with index values #6 and # 7.

As shown in fig. 7 (c), if bit information b is received by UE1 and UE3 _n,i Is "0", i.e. the first value, then UE1 and UE3 not only receive the corresponding port set α ₁ And alpha ₃ And also receives port set beta _n (β ₁ 、β ₂ ) But specifically which port set, further indication of the third indication information is required. At this time, UE1 and UE3 receive the third indication information, where the third indication information is

bit (bit information c) _n,i 1 bit), the third indication information is used for indicating 2 port sets beta _n (β ₁ 、β ₂ ) Of the above. For example, if the bit information c received by UE1 _n,i Is "0", UE1 is instructed to receive port set β ₁ Bit information c received by UE3 _n,i Is "1", UE3 is instructed to receive port set β ₂ . If the value of the first indication information received by the UE2 is 1, that is, is not the first value, then the UE2 only receives the port set α corresponding to the first indication information ₂ Does not receive port set beta _n (β ₁ 、β ₂ ) Any one of the above.

That is, as shown in fig. 7 (c), the UE1 determines the receiving port set α according to the first indication information and the third indication information ₁ And port set beta ₁ At this time, UE1 uses ports with index values of #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information ₂ At this time, UE2 uses ports with index values #4 and # 5. The UE3 determines a receiving port set alpha according to the first indication information and the third indication information ₃ And port set beta ₂ At this time, the UE3 uses ports with index values #3, #6, and # 7.

It should be understood that the second indication information in (a) of fig. 7 indicates the position (index value) of the port only for illustration, i.e., the second indication information may also indicate the port set α ₁ The middle port position is other index values, which is not limited in the embodiments of the present application.

Based on the technical scheme, the network equipment indicates the port number of the terminal equipment aiming at the sub-band i and the position of the DMRS port corresponding to the port number, so that the flexibility of a communication system can be improved, the waste of resources is reduced, and the signaling overhead is saved.

Optionally, in another possible implementation manner, the network device may define the UEs as a class a UE and a class B UE, and for the class a UE, the network device allocates a corresponding port set α to each UE in the class a UE _n And a port set beta _m . For class B UEs, the network device assigns a corresponding port set α to each of the class B UEs _n And a plurality of port sets beta _m 。

Take UE1 and UE2 as a class a UE and UE3 as a class B UE as an example. For the type a UE, the network device configures a port set α corresponding to UE1 ₁ And port set beta ₁ Port set α corresponding to UE2 ₂ And port set beta ₂ 。

For a type a UE (UE 1, UE 2), if the bit information b received by UE1 and UE2 _n,i When the value is a first value (e.g., 0), then UE1 receives the corresponding port set α ₁ And port set beta ₁ UE2 receives the corresponding port set α ₂ And port set beta ₂ . However, for a type B UE (UE 3), if the UE3 receives bit information B _n,i Is "0", i.e. the first value, then the UE3 not only receives the corresponding port set α ₃ And also receives 2 port sets beta _m 1 port set β in _m But specifically the port set beta _m (β ₁ 、β ₂ ) Which port set of the first port set requires further indication of the third indication information. At this time, the UE3 receives the third indication information, where the third indication information is

bit (bit information c) _n,i 1 bit), the third indication information is used for indicating 2 port sets beta _m (β ₁ 、β ₂ ) One of them.

However, if the bit information b is received by UE1 and UE2 _n,i When the value is not the first value, the UE1 only receives the port set α at this time ₁ UE2 only receives port set α ₂ . If bit information b is received by UE3 _n,i When the value is not the first value, the UE3 only receives the port set α at this time ₃ 。

It should be noted that the network device is not configurable to use the port set β for both the class a UE and the class B UE _m . That is, if all the UEs in the class a UEs determine to receive the corresponding port set α _n And corresponding port set beta _m I.e. UE1 receives the port set α ₁ And port set beta ₁ UE2 receiving Port set α ₂ And port set beta ₂ . It can be seen that in this case, all port sets β _m Are all used, the class B UE can no longer use the port set beta _m 。

Illustratively, UE1 and UE2 are class a UEs, and UE3 is a class B UE. FIG. 8 shows that 3 UEs (class A and B) compete together for the set of 2 group ports β _m (β ₁ 、β ₂ ) And a narrowband DMRS port indication of sub-band i. As shown in FIG. 8, assume port set α ₁ 、α ₂ And alpha ₃ There are 2 ports in each of them,set of ports beta ₁ And port set beta ₂ There are 1 port.

The second indication information indicates the port set alpha corresponding to the first bandwidth _n And beta _n The location (index value) of each port. As shown in (a) of fig. 8, the second indication information indicates the port set α ₁ The index value of the middle port position is #0, #1, and the port set alpha ₂ The index values of the middle port position are #4, #5, and the port set alpha ₃ The index values of the middle port positions are #6, #7, and the port set beta ₁ Has an index value of #2 for the port position in (1), and a port set β ₂ The index value of the port position in (1) is #3.

As shown in fig. 8 (b), if bit information b is received by UE1 and UE2 _n,i Is 0, that is, the first value, then UE1 receives the corresponding port set α ₁ And port set beta ₁ UE2 receives the corresponding port set α ₂ And port set beta ₂ . If bit information b of the first indication information received by the UE3 _n,i Is 1, i.e. not the first value, then UE3 only receives the port set α corresponding to it ₃ Does not receive port set beta _m (β ₁ 、β ₂ ) Any one of the above.

That is, the UE1 determines the receiving port set α according to the first indication information ₁ And port set beta ₁ At this time, UE1 uses ports with index values of #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information ₂ And port set beta ₂ At this time, UE2 uses ports with index values #3 to # 5; the UE3 determines a receiving port set alpha according to the first indication information ₃ At this time, UE3 uses ports with index values #6 and # 7.

As shown in fig. 8 (c), if the UE1 receives bit information b _n,i Is 0, that is, the first value, then UE1 receives the corresponding port set α ₁ And port set beta ₁ . If bit information b received by UE2 _n,i Is 1, i.e. not the first value, then UE2 only receives the corresponding port set α ₂ . If bit information b is received by UE3 _n,i When the value of (b) is 0, namely the first value,then UE3 receives the corresponding port set alpha ₃ And 2 port sets beta _m (β ₁ 、β ₂ ) But in particular the set of ports beta _m (β ₁ 、β ₂ ) Which port set, a further indication of the third indication information is required. At this time, the UE3 receives the third indication information (bit information c) _n,i ) The third indication information is

bit (bit information c) _n,i 1 bit), the third indication information is used for indicating 2 port sets beta _m (β ₁ 、β ₂ ) One of them. For example, if the UE3 receives bit information c _n,i Is "1", UE3 is instructed to receive port set β ₂ 。

That is, the UE1 determines the receiving port set α according to the first indication information ₁ And port set beta ₁ At this time, UE1 uses ports with index values of #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information ₂ UE2 uses ports with index values #4 and #5 at this time; the UE3 determines a receiving port set alpha according to the first indication information and the third indication information ₃ And port set beta ₂ At this time, the UE3 uses ports having index values #3, #6, and # 7.

It should be understood that the second indication information in (a) of fig. 8 indicates the position (index value) of the port is only for illustration, i.e., the second indication information may also indicate the port set α ₁ The middle port position is other index values, which is not limited in the embodiments of the present application.

Optionally, in a possible implementation manner, the first indication information may be carried in a Group downlink control information Group DCI. Specifically, the network device indicates in the Group DCI, and allocates first indication information (bit information b) to each subband i _n,i ) Is composed of

Corresponding to U UEs, each UE is instructed to use N port sets beta _n 1 port set β in (1) _m Or not usingAny one port set beta _m 。

Illustratively, fig. 9 shows 3 UEs contending for 2 port sets β _m And a narrowband DMRS port indication of sub-band i. As shown in FIG. 9, assume a port set α ₁ 、α ₂ And alpha ₃ There are 2 ports in the system, the port set β ₁ And port set beta ₂ There are 1 port.

Specifically, the second indication information indicates the port set α corresponding to the first bandwidth _n And beta _n The location (index value) of each port. As shown in (a) of fig. 9, the second indication information indicates the port set α ₁ The index values of the middle port positions are #0, #1, and the port set alpha ₂ The index values of the middle port positions are #4, #5, and the port set alpha ₃ The index values of the middle port position are #6, #7, and the port set beta ₁ The index value of the port position in (1) is #2, and the port set β ₂ The index value of the port position in (1) is #3.

As shown in Table 3, table 3 shows bit information b _n,i Value of and port set beta _m It should be understood that the corresponding relationship is only an example, and the application is not limited thereto.

For example, as shown in fig. 9 (b), if the UE1 corresponds to bit information b in the first indication information _n,i Is '00', indicating the port set beta ₁ At this time, UE1 receives the port set α ₁ And beta ₁ . If bit information b in the first indication information corresponding to the UE2 _n,i Is taken as '01', indicating a port set beta ₂ At this time, UE2 receives port set α ₂ And beta ₂ . Bit information b in first indication information corresponding to UE3 _n,i Is '11', indicating an empty port set beta _m At this time, the UE3 receives the port set α ₃ 。

That is, the UE1 determines the receiving port set α according to the first indication information ₁ And port set beta ₁ At this time, UE1 uses ports with index values of #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information ₂ And portSet of beta ₂ At this time, UE2 uses ports with index values #3 to # 5; UE3 determines receiving port set alpha according to the first indication information ₃ At this time, UE3 uses ports with index values #6 and # 7.

For another example, as shown in fig. 9 (c), if bit information b in the first indication information corresponding to UE1 is included _n,i Is '00', indicating the port set beta ₁ At this time, UE1 receives port set α ₁ And beta ₁ . If bit information b in the first indication information corresponding to the UE2 _n,i Is '10', does not indicate the port set beta _m Can be understood as indicating an empty port set beta _m At this time, UE2 receives only port set α ₂ . If bit information b in the first indication information corresponding to the UE3 _n,i Is taken to be "11", also indicating an empty port set beta _m At this time, UE3 receives only port set α ₃ 。

That is, the UE1 determines the receiving port set α according to the first indication information ₁ And port set beta ₁ In this case, UE1 uses ports with index values #0 to # 2; UE2 determines a receiving port set alpha according to the first indication information ₂ UE2 uses ports with index values #4 and #5 at this time; UE3 determines receiving port set alpha according to the first indication information ₃ At this time, UE3 uses ports with index values #6 and # 7.

TABLE 3

Bit information b _n	Set of ports beta _m
		00	β ₁
01	β ₂
		10	\
11	\

Optionally, in another possible implementation manner, the first indication information may be carried in intra-Group downlink control information Group DCI. Specifically, the network device indicates in the Group DCI, and allocates first indication information (bit information e) to each subband i _n,i ) Is composed of

Corresponding to N beta _m Indicating which of the U UEs uses the beta _m Or no UE using the port set beta _m 。

As shown in Table 4, table 4 shows bit information e _n,i It should be understood that the corresponding relationship is only an example, and the present application is not limited thereto.

For example, as shown in (d) of fig. 9, if the port set β ₁ Bit information e in corresponding first indication information _n,i Is '00', indicating that the UE1 uses the port set beta ₁ At this time, UE1 receives port set α ₁ And beta ₁ . If port set beta ₂ Bit information e in corresponding first indication information _n,i Is '10', indicating that the UE3 uses the port set beta ₂ At this time, the UE3 receives the port set α ₃ And beta ₂ . No bit information in the first indication information indicates that the UE2 uses the port set beta ₁ And beta ₂ UE2 receives only port set α ₂ 。

That is, the UE1 determines the receiving port set α according to the first indication information ₁ And port set beta ₁ At this time, UE1 uses ports with index values of #0 to # 2; UE2 according to the first indication informationDetermining a set of receive ports alpha ₂ UE2 uses ports with index values #4 and #5 at this time; UE3 determines receiving port set alpha according to the first indication information ₃ And beta ₂ At this time, the UE3 uses ports with index values #3, #6, and # 7.

TABLE 4

Bit information e _n,i	Set of ports beta _m
		00	UE1
01	UE2
		10	UE3
11	\

According to the technical scheme provided by the embodiment of the application, different rank numbers are indicated for different sub-bands, and the positions of the corresponding number of DMRS ports are indicated for different sub-bands, so that the flexibility of a communication system can be improved, and the waste of transmission resources is reduced.

The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic, all of which are contemplated to fall within the scope of the present application.

It is to be understood that, in the above-described method embodiments, the method and operations implemented by each device/apparatus may also be implemented by a component (e.g., a chip or a circuit) of the corresponding device/apparatus.

It should be understood that the manner, the case, the category and the division of the embodiments in the present application are only for convenience of description and should not constitute a particular limitation, and features in various manners, categories, cases and embodiments can be combined without contradiction

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.

It should be understood that the above description is only for the purpose of helping those skilled in the art better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Various equivalent modifications or changes will be apparent to those skilled in the art in light of the above examples given, for example, some steps in the above methods may not be necessary, or some steps may be newly added, etc. Or a combination of any two or more of the above embodiments. Such modifications, variations, or combinations are also within the scope of the embodiments of the present application.

It should be understood that the foregoing descriptions of the embodiments of the present application focus on highlighting differences between the various embodiments, and that the same or similar parts that are not mentioned may be referred to one another, and thus, for brevity, will not be described again.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 3 to 9. Hereinafter, the apparatus provided in the embodiment of the present application will be described in detail with reference to fig. 10 to 11. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.

Fig. 10 is a schematic diagram of a communication device according to an embodiment of the present application. The communication apparatus is configured to implement the steps of the corresponding network device and the corresponding terminal device in the foregoing embodiments, as shown in fig. 10, the communication apparatus 1000 includes a processing unit 1010 and a transceiver unit 1020.

In a first embodiment, the communication apparatus is configured to implement the steps of the corresponding network device in the foregoing embodiments:

the processing unit 1010 is configured to determine a DMRS port set corresponding to a first subband, where the DMRS port set includes a first DMRS port set, and the first DMRS port set corresponds to a terminal device; the transceiver unit 1020 is configured to send first indication information, where the first indication information is used to indicate that the DMRS port set includes M second DMRS port sets of the N second DMRS port sets, where N and M are positive integers greater than or equal to 1, the first subband belongs to a first bandwidth, and the first bandwidth further includes a second subband, and the first subband is different from the second subband.

Optionally, in some embodiments, the transceiver unit 1020 is further configured to: and sending second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

Optionally, in some embodiments, the second indication information is used to indicate an index value of each DMRS port in the first set of DMRS ports and an index value of each DMRS port in the N second sets of DMRS ports.

Optionally, in some embodiments, N is equal to 1; the first indication information includes a first value indicating that the set of DMRS ports includes 1 of the N second sets of DMRS ports.

Optionally, in some embodiments, N is greater than 1; the first indication information includes a first value to indicate that the set of DMRS ports includes M of the N second DMRS port sets.

Optionally, in some embodiments, M is equal to 1, and the transceiver unit 1020 is further configured to: sending third indication information, wherein the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

Optionally, in some embodiments, the first indication information and/or the third indication information are carried in a Group downlink control information Group DCI.

In a second embodiment, the communication apparatus is configured to implement the steps of the corresponding terminal device in the above embodiments:

the transceiver unit 1020 is configured to receive first indication information, where the first indication information is used to indicate that the DMRS port sets include M second DMRS port sets of the N second DMRS port sets, where the DMRS port sets correspond to the first subband, the DMRS port sets include a first DMRS port set, and the first DMRS port set corresponds to the terminal device;

the processing unit 1010 is configured to determine the DMRS port set according to the first indication information; wherein, N and M are both positive integers greater than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth further includes a second sub-band, and the first sub-band is different from the second sub-band.

Optionally, in some embodiments, the set of DMRS ports corresponds to the first bandwidth, and the transceiver unit 1020 is further configured to: and receiving second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

Optionally, in some embodiments, M is equal to 1, and the transceiver unit 1020 is further configured to: receiving third indication information which is

A bit to indicate 1 of the N second sets of DMRS ports.

Fig. 11 shows a schematic block diagram of an apparatus 1100 provided herein, the apparatus 1100 comprising:

a memory 1110 for storing a program, the program comprising code;

a transceiver 1120 for communicating with other devices;

a processor 1130 for executing the program codes in memory 1110.

Optionally, when the code is executed, the processor 1130 may implement the operations of the method, which are not described herein again for brevity. The transceiver 1120 is used to perform specific signal transceiving under the driving of the processor 1130.

The device 1100 may be any one of the network device and the terminal device described above, and performs the operations of the processing unit, and the transceiver may include a transmitter and/or a receiver, and performs the corresponding steps of the transmitting unit and the receiving unit, respectively.

Embodiments of the present application further provide a computer-readable medium for storing a computer program code, where the computer program includes instructions for executing the archive management method of the embodiments of the present application in the foregoing method. The readable medium may be a read-only memory (ROM) or a Random Access Memory (RAM), which is not limited in this embodiment of the present application.

The present application also provides a computer program product comprising instructions that, when executed, cause the archive management device to perform the operations of archive management corresponding to the above method.

An embodiment of the present application further provides a system chip, where the system chip includes: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, a pin or a circuit, etc. The processing unit can execute computer instructions to enable a chip in the device to execute any one of the file management methods provided by the embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

Alternatively, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like. The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for executing programs for controlling the transmission method of the feedback information. The processing unit and the storage unit may be decoupled, and are respectively disposed on different physical devices, and are connected in a wired or wireless manner to implement respective functions of the processing unit and the storage unit, so as to support the system chip to implement various functions in the foregoing embodiments. Alternatively, the processing unit and the memory may be coupled to the same device.

It will be appreciated that the memory elements of the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, synchronous Link DRAM (SLDRAM), and direct rambus 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 appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Additionally, the terms "system" and "network" are often used interchangeably herein.

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 technical 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 is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the unit is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

This function, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the 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 of the changes or substitutions within the technical scope of the present application, and shall 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

1. A demodulation reference signal (DMRS) port indication method is characterized by comprising the following steps:

the method comprises the steps that a network device determines a DMRS port set corresponding to a first sub-band, wherein the DMRS port set comprises a first DMRS port set, and the first DMRS port set corresponds to a terminal device;

the network device transmitting first indication information indicating that the set of DMRS ports includes M of N second sets of DMRS ports,

the first sub-band belongs to a first bandwidth, the first bandwidth further comprises a second sub-band, and the first sub-band is different from the second sub-band.

2. The method of claim 1, wherein the set of DMRS ports corresponds to the first bandwidth, the method further comprising:

and the network equipment sends second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

3. The method of claim 2,

the second indication information is used to indicate an index value for each of the first set of DMRS ports and an index value for each of the N second sets of DMRS ports.

4. The method according to any one of claims 1 to 3, wherein N is equal to 1;

the first indication information includes a first value to indicate that the set of DMRS ports includes 1 of the N second sets of DMRS ports

5. The method of any one of claims 1 to 3, wherein N is greater than 1;

the first indication information includes a first value indicating that the set of DMRS ports includes M of the N second sets of DMRS ports.

6. The method of claim 5, wherein M is equal to 1, the method further comprising:

the network equipment sends third indication information, wherein the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

7. The method of claim 6, wherein the first indication information and/or the third indication information is carried in an intra-Group downlink control information Group DCI.

8. A demodulation reference signal (DMRS) port indication method is characterized by comprising the following steps:

receiving first indication information by a terminal device, wherein the first indication information is used for indicating that a DMRS port set comprises M second DMRS port sets in N second DMRS port sets, the DMRS port sets correspond to a first sub-band, the DMRS port sets comprise a first DMRS port set, and the first DMRS port set corresponds to the terminal device;

the terminal equipment determines the DMRS port set according to the first indication information;

wherein, N and M are both positive integers greater than or equal to 1, the first sub-band belongs to a first bandwidth, the first bandwidth further includes a second sub-band, and the first sub-band is different from the second sub-band.

9. The method of claim 8, wherein the set of DMRS ports corresponds to the first bandwidth, the method further comprising:

and the terminal equipment receives second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

10. The method of claim 9,

11. The method according to any one of claims 8 to 10, wherein N is equal to 1;

the first indication information includes a first value to indicate that the set of DMRS ports includes 1 of the N second sets of DMRS ports.

12. The method of any one of claims 8 to 10, wherein N is greater than 1;

the first indication information includes a first value to indicate that the set of DMRS ports includes M of the N second sets of DMRS ports.

13. The method of claim 12, wherein M is equal to 1, the method further comprising:

the terminal device receives the thirdIndication information, the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

14. The method of claim 13, wherein the first indication information and/or the third indication information is carried in an intra-Group downlink control information Group DCI.

15. A communications apparatus, comprising:

a processing unit, configured to determine a set of DMRS ports corresponding to a first subband, where the set of DMRS ports includes a first set of DMRS ports, and the first set of DMRS ports corresponds to a terminal device;

a transceiver unit configured to transmit first indication information indicating that the set of DMRS ports includes M second sets of DMRS ports among the N second sets of DMRS ports,

16. The apparatus of claim 15, wherein the set of DMRS ports corresponds to the first bandwidth,

the transceiver unit is further configured to: and sending second indication information, wherein the second indication information is used for indicating the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

17. The apparatus of claim 16,

18. The apparatus of any one of claims 15 to 17, wherein N is equal to 1;

19. The apparatus of any one of claims 15 to 17, wherein N is greater than 1;

20. The apparatus of claim 19, wherein M is equal to 1,

the transceiver unit is further configured to: sending third indication information, wherein the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

21. The apparatus of claim 19, wherein the first indication information and/or the third indication information is carried in an intra-Group downlink control information Group DCI.

22. A communications apparatus, comprising:

a transceiver unit configured to receive first indication information indicating that a set of DMRS ports includes M second sets of DMRS ports out of N second sets of DMRS ports, the DMRS ports corresponding to a first subband, the DMRS ports including a first set of DMRS ports, the first set of DMRS ports corresponding to a terminal device;

a processing unit, configured to determine the DMRS port set according to the first indication information;

23. The apparatus of claim 22, wherein the set of DMRS ports corresponds to the first bandwidth,

the transceiver unit is further configured to: receiving second indication information, where the second indication information is used to indicate the first DMRS port set and the N second DMRS port sets corresponding to the first bandwidth.

24. The apparatus of claim 23,

25. The apparatus of any one of claims 22 to 24, wherein N is equal to 1;

26. The device of any one of claims 22 to 24, wherein N is greater than 1;

27. The apparatus of claim 26, wherein M equals 1,

the transceiver unit is further configured to: receiving third indication information, wherein the third indication information is

A bit to indicate 1 of the N second sets of DMRS ports.

28. The apparatus of claim 27, wherein the first indication information and/or the third indication information are carried in an intra-Group downlink control information Group DCI.

29. A computer-readable medium for storing a program which, when executed by a processor, performs the method of any one of claims 1 to 7 or the method of any one of claims 8 to 14.

30. A system-on-chip, the system-on-chip comprising:

a processor coupled with a memory, the memory to store instructions;

the processor is used for calling and executing the instructions from the memory, so that the communication device provided with the chip system executes the method of any one of claims 1 to 7 or the method of any one of claims 8 to 14.