WO2018058456A1

WO2018058456A1 - Sending method, receiving method and apparatus for channel state information reference signal

Info

Publication number: WO2018058456A1
Application number: PCT/CN2016/100878
Authority: WO
Inventors: 贺传峰
Original assignee: 华为技术有限公司
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2018-04-05
Also published as: CN109716797A

Abstract

Provided by the present application are a sending method, receiving method and apparatus for a channel state information reference signal. The sending method for a channel state information reference signal comprises: a network device determining the number of antenna ports corresponding to a channel state information reference signal (CSI-RS) resource; dividing the antenna ports into at least two antenna port sets; determining a code division multiplexing (CDM) type corresponding to each antenna port set; sending CSI-RS resource configuration information to a terminal device, the CSI-RS resource configuration information being used to indicate a CSI-RS resource and a CDM type corresponding to the antenna ports in each antenna port set; and sending a CSI-RS of the antenna ports in the antenna port set according to the CDM type and the CSI-RS resource corresponding to each antenna port. Using the method and apparatus provided by the present application, it is possible to reduce the effect of configuring a uniform CDM type on a result of channel estimation or channel measurement performed by a CSI-RS.

Description

Channel state information reference signal transmitting method and receiving method and device

Technical field

The present application relates to the field of wireless communications, and in particular, to a channel state information reference signal transmitting method and receiving method and device.

Background technique

In a communication system, a terminal device usually needs to use a channel state information reference signal (CSI-RS) transmitted by a network device to implement channel estimation or channel measurement. In order for the terminal device to know which time-frequency signals are used for transmitting the CSI-RS, the network device needs to configure the CSI-RS resources for transmitting the CSI-RS for the terminal device before transmitting the reference signal.

In a long term evolution (LTE) system, a network device has multiple antenna ports, and the terminal device needs to perform channel estimation or channel measurement for each antenna port, so the network device needs to be configured for the terminal device. The CSI-RS resource contains a certain number of antenna ports. For example, in LTE R10, the number of antenna ports included in the CSI-RS resource may be 1, 2, 4, or 8; in LTE R13, the number of antenna ports included in the CSI-RS resource may be 12 or 16; in LTE R14 The number of antenna ports included in the CSI-RS resource is 20, 24, 28, or 32.

In general, the CSI-RS of each antenna port needs to occupy a resource element (RE) in each resource block (RB). In order to fully utilize the transmit power to ensure the transmit power of the CSI-RS of each port, the CSI-RS of one port can be sent through a set of REs, and the CSI-RSs of different ports can be code division multiplexing. The method referred to as CDM) is multiplexed on a group of identical REs. The antenna ports in the CSI-RS resources configured by the network device to the terminal device adopt the same CDM type, and then the CSI-RSs of the respective antenna ports implement CDM according to the CDM type. For example, when the CDM type configured by the network device is CDM2, the CSI-RSs of the 2 antenna ports of the terminal device are multiplexed on 2 REs by orthogonal codes of length 2, and the CDM type configured by the network device is CDM4. At the time, the CSI-RSs of the four antenna ports are multiplexed on the four REs by orthogonal codes of length 4.

As the number of antenna ports of the terminal device increases, for example, when the number of antenna ports is 32, if the antenna port of the CSI-RS resource configured by the network device to the terminal device adopts a unified CDM type, it may cause The results obtained by using CSI-RS for channel estimation or channel measurement are affected.

Summary of the invention

The present application provides a channel state information reference signal sending method and receiving method and device, which can reduce the degree to which the result of channel estimation or channel measurement of the CSI-RS is affected by configuring a unified CDM type.

In a first aspect, the present application provides a channel state information reference signal sending method, including: determining, by a network device, a number of antenna ports corresponding to a channel state information reference signal CSI-RS resource; the network device corresponding to the number of antenna ports The antenna port is divided into at least two antenna port sets; the network device determines a code division multiplexing CDM type corresponding to each of the at least two antenna port sets; the network device sends the terminal device to the terminal device CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate CSI-RS resources and CDM types corresponding to antenna ports in each of the at least two antenna port sets; the network The device sends the CSI-RS of the antenna port in the antenna port set according to the CDM type and the CSI-RS resource corresponding to each of the antenna ports.

With reference to the first aspect, in a first possible implementation manner of the first aspect, in the set of the at least two antenna ports, the time-frequency resource density corresponding to the antenna port in the different antenna port sets is different.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the time-frequency resource corresponding to the antenna port in the first antenna port set of the at least two antenna port sets The density is higher than a time-frequency resource density corresponding to the antenna port of the second antenna port set of the at least two antenna port sets, and the first antenna port set corresponds to a CDM length lower than the second antenna port set. Corresponding CDM length.

With reference to the first aspect, or any one of the first to the second possible implementation manners of the first aspect, in the third possible implementation manner of the first aspect, the antenna port of each of the at least two antenna port sets Each antenna port set in the set contains 4 or 8 antenna ports.

With reference to the first aspect, or any one of the first to the second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, if the CSI-RS resource density of the antenna port in the antenna port set is If 1, the CDM length configured for the antenna port set is 2 or 4; or, if the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the CDM length configured for the antenna port set It is 4 or 8.

In a second aspect, the present application further provides a channel state information reference signal receiving method, including: The CSI-RS resource configuration information is used to indicate a CSI-RS resource corresponding to an antenna port in each of the at least two antenna port sets. And a code division multiplexing CDM type; the terminal device receives a CSI-RS of each antenna port in the antenna port set according to a CSI-RS resource and a CDM type corresponding to an antenna port in each of the antenna port sets.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the terminal device performs channel measurement according to the CSI-RS.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, in the set of the at least two antenna ports, the antenna port corresponding to the different antenna port sets The time-frequency resource density is different.

With reference to the two possible implementations of the first aspect, in a third possible implementation manner of the first aspect, the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets a time-frequency resource density corresponding to an antenna port of the second antenna port set of the at least two antenna port sets, where the CDM length corresponding to the first antenna port set is lower than the second antenna port set The length of the CDM.

With reference to the first aspect, or any one of the first to third possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, if the CSI-RS resource density of the antenna port in the antenna port set is If 1, the CDM length configured for the antenna port set is 2 or 4; or, if the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the CDM length configured for the antenna port set It is 4 or 8.

In a third aspect, the present application further provides a channel state information reference signal sending apparatus, where the apparatus may include a receiving module, a processing module, and a sending module, and the like, for performing the method steps in the various implementation manners of the first aspect. The receiving unit transceiver may be implemented by a transceiver of the network device, or may be implemented by a processor, and the transceiver unit may also be implemented by a transceiver of the network device. Alternatively, the transceiver implementation may be controlled by a processor; the processing unit transceiver may be implemented by the processor.

In a fourth aspect, the present application further provides a channel state information reference signal receiving apparatus, where the apparatus may include a receiving module, a processing module, and a receiving module, and the like, for performing the method steps in the various implementation manners of the first aspect. The receiving unit transceiver may be implemented by a transceiver of the terminal device, or may be implemented by a processor, and the transceiver unit may also be sent and received by the terminal device. The processor may be implemented, or may be controlled by a processor; the processing unit transceiver may be implemented by the processor.

In a fifth aspect, the present application further provides a wireless communication system, which may include the network device described in the foregoing third aspect or the terminal device described in the foregoing fourth aspect.

In a sixth aspect, the present application further provides a storage medium, where the computer storage medium may store a program, and when the program is executed, the channel state information reference signal sending method or the channel state information reference signal receiving method provided by the present application may be implemented. Some or all of the steps in the examples.

With the method or device provided by the present invention, it is possible to reduce the result of channel estimation or channel measurement of the CSI-RS caused by configuring a unified CDM type.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly described below. Obviously, for those skilled in the art, without any creative labor, Other drawings can also be obtained from these figures.

1 is a schematic flowchart of an embodiment of a method for transmitting a channel state information reference signal according to the present application;

2 is a schematic diagram of an embodiment of a CSI-RS resource distribution according to the present application;

3 is a schematic flowchart of an embodiment of a correspondence between a CSI-RS resource and a CDM type according to the present application;

4 is a schematic flowchart of an embodiment of a method for receiving a channel state information reference signal according to the present application;

FIG. 5 is a schematic structural diagram of an embodiment of a network device according to the present application;

6 is a schematic structural diagram of an embodiment of a terminal device according to the present application;

7 is a schematic structural diagram of another embodiment of a network device according to the present application;

FIG. 8 is a schematic structural diagram of another embodiment of a terminal device according to the present application;

detailed description

The embodiments of the present invention can be applied to a wireless communication system including a terminal device or a terminal device. For example, an LTE system, or other wireless communication system using various radio access technologies, for example, using code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access, etc. Into the technology system, the subsequent evolution system, such as the fifth generation (5G) system.

Specifically, the embodiment of the present invention is applicable to data transmission between a terminal device and a network device, data transmission between the terminal device and the terminal device, or data transmission between the network device and the network device. The terminal device can be a device that provides voice and or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a mobile terminal. The computer, for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and or data with the wireless access network. For example, personal communication service (PCS) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal Digital assistant, PDA for short. A wireless terminal may also be referred to as a system, a subscriber unit (SU), a subscriber station (SS), a mobile station (MS), a remote station (RS), and an access station. Point (access point, AP for short), remote terminal (RT), access terminal (AT), user terminal (UT), user agent (UA) User equipment, or user equipment (UE).

The network device involved in the embodiments of the present invention may be a base station, or an access point, or may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface. The base station can be used to convert the received air frame and the IP packet into a router between the wireless terminal and the rest of the access network, wherein the rest of the access network can include an Internet Protocol (IP) network. . The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNodeB) in LTE. The application is not limited.

Referring to FIG. 1, it is a flowchart of an embodiment of a reference signal sending method of the present application. The method steps shown in this embodiment may be performed by a network device. If shown in FIG. 1, the embodiment may include the following steps:

Step 101: The network device determines the number of antenna ports corresponding to the CSI-RS resource. The CSI-RS resource refers to a time-frequency resource allocated by the network device for transmitting the respective antenna ports CSI-RS.

The number of antenna ports may also be different according to the number of antenna ports supported by the network device, the capability of the terminal device, and the CSI measurement. For example, in LTE R14, the number of antenna ports of the CSI-RS resource may be 20, 24, and 28 Or 32. The network device may first determine the number of antenna ports of the CSI-RS resource according to the number of supported antenna ports, the capabilities of the terminal device, and the requirements of CSI measurement.

Step 102: The network device divides the antenna port corresponding to the number of antenna ports of the CSI-RS resource into at least two antenna port sets.

After the number of antenna ports is determined, the network device divides the antenna port into at least two antenna port sets according to the number of the antenna ports, and the sum of the number of antenna ports in each antenna port set is the CSI-RS resource. The number of antenna ports. Each antenna port set may include at least one antenna port, and the number of antenna ports in each antenna port set may be equal or unequal.

In LTE, a CSI-RS resource of a high number of ports is usually generated by aggregation of a low number of port CSI-RS resources, for example, when the number of antenna ports of the CSI-RS resource is 12 or more, the terminal device is configured. The CSI-RS resource is aggregated by a 4-port CSI-RS resource or an 8-port CSI-RS resource. Since the CSI-RS resources of the high number of ports are usually generated by the aggregation of the low number of port CSI-RS resources, the number of antenna port sets and the antennas included in each antenna port set can be determined according to the aggregation manner of the CSI-RS resources. The number of ports.

For example, in LTE R13, the number of antenna ports of the CSI-RS can be configured to be 12 or 16, that is, the CSI-RS supports a maximum of 16 antenna ports, and the CSI-RS resources of the 16 antenna ports can adopt two 8-port CSIs. The RS resources are aggregated. The CSI-RS resources of the 12 antenna ports can be aggregated by using three 4-port CSI-RS resources. Therefore, when dividing the port set, if the number of the antenna ports is 16, all the antenna ports of the terminal can be divided into two antenna port sets, wherein each antenna port set includes 8 antenna ports. If the number of antenna ports is 12, all antenna ports of the terminal may be divided into three antenna port sets, wherein each antenna port set includes 4 antenna ports.

Since the CSI-RS resources of the high number of ports are usually aggregated by the 4-port CSI-RS resources and the 8-port CSI-RS resources, the number of antenna ports in each of the antenna port sets may be 4 or 8.

Step 103: The network device determines a code division multiplexing CDM type corresponding to each of the at least two antenna port sets.

After the antenna port set is determined, the network device configures one CDM type for each of the antenna port sets. The CDM types corresponding to the respective antenna port sets may be the same or different. The CDM type includes CDM2, CDM4, and CDM8, and different types of CDMs have different lengths. Generally, the CDM length of CDM8 is greater than the CDM length of CDM4, and the CDM length of CDM4 is greater than the CDM length of CDM2. Other CDM types can be deduced by analogy.

In order to reduce the radio resources occupied by the reference signal, the CSI-RS resource density can usually be reduced from the frequency domain. The CSI-RS resource density refers to the ratio between the number of REs of the CSI-RSs used to carry a group of antenna ports and the system bandwidth, as the density of the group of antenna ports. If the antenna port in the CSI-RS resource is not transmitted in the CDM mode, the CSI-RS of each antenna port is carried by one RE. Therefore, the CSI-RS resource density can also be expressed, and the first type of RB and the total number of RBs are The ratio, where the first type of RB refers to an RB in which an RE for carrying a CSI-RS exists, and its unit can be generally expressed as: RE/RB/port. For example, a CSI-RS resource density of 1 RE/RB/port means that for each antenna port in a port set, there is one RE in each RB for transmitting the CSI-RS of the antenna port. The CSI-RS resource density of 0.5RE/RB/port means that for each antenna port in a port set, only one RE in every two RBs is used to transmit the CSI-RS of the antenna port, that is, The RE transmitting the CSI-RS does not appear in every RB, but only one of the 2 RBs has an RE for CSI-RS transmission. For the antenna ports in the CSI-RS resources to be transmitted in CDM mode, the CSI-RSs of a group of antenna ports are carried by a group of REs, so the CSI-RS resource density of the group of antenna ports may also be represented as the group of antenna ports. The ratio of the number of occupied REs to the total number of RBs and the number of antenna ports included in the group.

When the antenna port of the CSI-RS resource is divided into three antenna port sets, the density of the CSI-RS corresponding to the first antenna port set may be set to 1 RE/RB/port, and the second antenna port set and The density of the corresponding CSI-RS of the third antenna port set may be 0.5 RE/RB/port. If there are 8 antenna ports in each antenna port set, only 16 REs can be carried in each RB to carry CSI-RS, so that the radio resource overhead for supporting CSI-RS with antenna port number 24 can be reduced.

For example, as shown in FIG. 2, each square represents an RE, and the REs having the same RE filling manner as indicated by 201 are used to transmit the RE of the CSI-RS of the antenna port in the first antenna port set; and the RE indicated by 202 The REs of the same filling mode are used to transmit the REs of the CSI-RSs of the antenna ports in the second antenna port set; the REs of the same manner as the RE filling manner indicated by 203 are used to transmit the CSI-RSs of the antenna ports in the third antenna port set. RE. It should be noted that only two RBs of the nth RB and the n+1th RB are shown in FIG. 4, and in practice, more RBs or fewer RBs may be included.

The network device may configure the code division multiplexing CDM type corresponding to the antenna port set according to the CSI-RS resource density corresponding to the antenna port in the antenna port set. Generally, the CDM length of the antenna port with a low CSI-RS resource density can be made higher than the CDM length of the antenna port with a high CSI-RS resource density, thereby compensating for the loss of CSI measurement performance due to the low CSI-RS resource density. That is, if the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets is higher than the antenna port corresponding to the second antenna port set in the at least two antenna port sets The time-frequency resource density, the CDM length corresponding to the first antenna port set is lower than the CDM length corresponding to the second antenna port set degree.

For example, if the CSI-RS resource density of the antenna port in the antenna port set is 1RE/RB/port, the CDM type configured for the antenna port set may be CDM for sharing with the UEs of R12 and R13. 2 or 4, to ensure that it can be shared with the UEs of R12 and R13; for the port where the CSI-RS resource density of the antenna port in the antenna port set is less than 1RE/RB/port, the CDM type configured for the antenna port set may be It is CDM4 or 8, so that the antenna port in the antenna port set obtains higher transmission power to compensate for the performance loss of CSI measurement caused by the CSI-RS resource density reduction. Since this part of the port cannot be shared with the UEs of R12 and R13, CDM8 can be used to obtain higher transmission power. The antenna port in the first port set in the CSI-RS resource configuration adopts CDM4, and the antenna port in the second and third port set adopts CDM 8. For example, as shown in FIG. 3, REs of the same letter represent RE groups according to the same CDM. Among them, the CDM lengths of A and B are equivalent, the CDM lengths of C and D are equal, and the CDM lengths of A and B are smaller than the CDM lengths of C and D. For example, A and B can be CDM4, while C and D can be CDM8.

Step 104: The network device sends the CSI-RS resource configuration information to the terminal device, where the CSI-RS resource configuration information is used to indicate the CSI corresponding to the antenna port in each of the at least two antenna port sets. RS resources and CDM types.

After the CSI-RS resource and the CDM type corresponding to the antenna port in each antenna port set are determined, the network device may send CSI-RS resource configuration information to the terminal device, where the CSI-RS resource configuration information is used to indicate the CSI-RS resources and CDM types corresponding to antenna ports in each of the at least two antenna port sets. The CSI-RS resource corresponding to the antenna port in the antenna port set may include the CSI-RS resource used to transmit each antenna port in the antenna port set.

For example, if the antenna port set includes a first antenna port set and a second antenna port set, the CSI-RS resource configuration information may be used to indicate: a CSI-RS corresponding to an antenna port in the first antenna port set. The CDM type corresponding to the resource and the first antenna port set, and the CDI type corresponding to the CSI-RS resource corresponding to the antenna port in the second antenna port set and the CDM type corresponding to the second antenna port set.

Step 105: The network device sends the CSI-RS of the antenna port in the antenna port set according to the CDM type and the CSI-RS resource corresponding to each of the antenna port sets.

After the CSI-RS resource configuration information is sent, since the CSI-RS resources corresponding to each antenna port have been determined, the network device according to the CDM type and CSI corresponding to each of the antenna port sets. The RS resource transmits a CSI-RS of an antenna port in the set of antenna ports. The specific sending process will not be described here.

By dividing the antenna port in the CSI-RS resource into different antenna port sets and configuring different CDM types for the CSI-RS resource configuration in each port set, it may be in the port set with low CSI-RS resource density. The port configures a higher CDM length to obtain higher transmit power, which is used to compensate for the performance loss of CSI measurement caused by the CSI-RS resource density reduction. The CSI measurement performance of the ports of different densities in the CSI-RS resources can be similar, the accuracy of the CSI measurement is improved, and the downlink throughput of the system is improved.

Referring to FIG. 4, it is a schematic flowchart of an embodiment of a channel state information reference signal receiving method according to the present application. As shown in FIG. 4, the method may include:

Step 401: The terminal device receives the channel state information reference signal CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate an antenna port corresponding to each antenna port set in the at least two antenna port sets. CSI-RS resources and CDM types.

The terminal device may first receive the CSI-RS resource configuration information, and the related content of the CSI-RS resource configuration information may refer to the foregoing embodiment, and details are not described herein again.

Step 402: The terminal device receives, according to the CSI-RS resource and the CDM type corresponding to the antenna port in each of the antenna port sets, a CSI-RS of an antenna port in each of the antenna port sets.

After receiving the CSI-RS resource configuration information, determining, according to the CSI-RS resource configuration information, a CDM type and a CSI-RS resource corresponding to each antenna port set; and determining a CDM corresponding to each antenna port. Type and CSI-RS resources; after the CDM type and CSI-RS resources of each antenna port are determined, the terminal device receives the CSI-RS of each antenna port according to the CDM type of each antenna port and the CSI-RS resource.

The channel measurement performed by using the technical solution provided by the present embodiment can make the measurement performance of each antenna port similar, so that the performance difference of the channel measurement can be reduced when the terminal device performs channel measurement.

After the CSI-RS of each of the antenna ports, the terminal device may also perform channel measurement according to the reception result of the CSI-RS. Therefore, after step 402, the method may further include:

Step 403: The terminal device performs channel measurement according to the CSI-RS.

After the measurement result is generated by the channel measurement, the terminal device may further send the measurement result to the network device, so that the network device performs scheduling and the like according to the measurement result.

The channel measurement is performed by using the technical solution provided by the implementation, which may be that the channel measurement result is more accurate.

Referring to FIG. 5, it is a schematic structural diagram of an embodiment of an application network device. The network device can be used to perform The channel state information reference signal transmission method corresponding to FIG. 1 is performed. As shown in FIG. 5, the network device may include: a receiving unit 501, a processing unit 502, and a sending unit 503.

The processing unit 502 is configured to determine the number of antenna ports corresponding to the CSI-RS resource of the channel state information reference signal, and divide the antenna port corresponding to the number of the antenna ports into at least two antenna port sets; determine the at least two a code division multiplexing CDM type corresponding to each of the antenna port sets in the antenna port set; a sending unit 503, configured to send CSI-RS resource configuration information to the terminal device, where the CSI-RS resource configuration information is used to indicate the a CSI-RS resource and a CDM type corresponding to an antenna port in each of the at least two antenna port sets; and transmitting CSI of the antenna port in the antenna port set according to a CDM type corresponding to each of the antenna ports -RS.

Referring to FIG. 6, a schematic structural diagram of an embodiment of an application terminal device is shown. The terminal device may be configured to perform the channel state information reference signal receiving method corresponding to FIG. 4. As shown in FIG. 6, the terminal device may include: a receiving unit 601, a processing unit 602, and a sending unit 603.

The receiving unit 601 is configured to receive channel state information reference signal CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate an antenna port in each of the at least two antenna port sets. Corresponding CSI-RS resources and code division multiplexing CDM types; receiving CSIs of antenna ports in each of the antenna port sets according to CSI-RS resources and CDM types corresponding to antenna ports in each of the antenna port sets -RS.

Optionally, the processing unit 602 performs channel measurement according to the CSI-RS of the antenna port in each of the antenna port sets. The sending unit 603 is configured to send the measurement result obtained by the channel measurement to the network device.

FIG. 7 is a schematic structural diagram of another embodiment of a network device according to the present application. The network device in this embodiment may be used to perform the method steps in the channel sending method shown in FIG. 1. As shown in FIG. 7, the network device may be composed of a processor 701, a memory 702, a transceiver 703, and the like.

The processor 701 is a control center of the network device, and connects various parts of the entire network device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory, Perform various functions of the network device and/or process data. The processor may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above PLD can be complex programmable A complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 702 may include a volatile memory, such as a random access memory (RAM); and may also include a non-volatile memory, such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory may also include a combination of the above types of memory. A program or code may be stored in the memory, and the processor in the network element may implement the function of the network element by executing the program or code.

In the embodiment of the present application, the network device may be used to implement various steps of the channel state information reference signal sending method in the foregoing embodiment. The function to be implemented by the receiving unit 501 may be implemented by the transceiver 703 of the terminal device or by the transceiver 703 controlled by the processor 701; the function to be implemented by the sending unit 503 may also be implemented by the terminal. The transceiver 703 of the device is implemented or can also be implemented by the transceiver 703 controlled by the processor 701; the functions to be implemented by the processing unit 502 can be implemented by the processor 701.

FIG. 8 is a schematic structural diagram of another embodiment of a terminal device according to the present application.

FIG. 8 is a schematic structural diagram of an embodiment of a terminal device according to the present application. The terminal device may be the terminal device in any of the foregoing embodiments, and may be used to perform the method steps in the channel sending method shown in FIG.

As shown in FIG. 8, the terminal device may include a processor 801, a memory 802, and a transceiver 803. The transceiver 803 may include components such as a receiver 8031, a transmitter 8032, and an antenna 8033. The terminal device may also include more or less components, or some components, or different component arrangements, which are not limited by the present invention.

The processor 801 is a control center of the terminal device, which connects various parts of the entire terminal device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 802, and calling data stored in the memory, To perform various functions of the terminal device and/or process data. The processor 801 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions. For example, the processor may include only a central processing unit (CPU), or may be a GPU, a digital signal processor (DSP), and a control chip in the transceiver 803 (for example, a baseband). A combination of chips). In the embodiment of the present application, the CPU may be a single operation core, and may also include a multi-operation core.

The transceiver 803 is configured to establish a communication channel, and enable the terminal device to connect to the receiving device through the communication channel, thereby implementing data transmission between the terminal devices. The transceiver 803 may include a wireless local area network (WLAN) module, a Bluetooth module, a baseband module, and the like, and a radio frequency (RF) circuit corresponding to the communication module. Used for wireless local area network communication, Bluetooth communication, infrared communication, and/or cellular communication system communication, such as wideband code division multiple access (WCDMA) and/or high speed downlink packet access (high speed) Downlink packet access (HSDPA). The transceiver 803 is configured to control communication of components in the terminal device and can support direct memory access.

In various implementations of the present application, the various transceivers 803 in the transceiver 803 are typically in the form of integrated circuit chips and can be selectively combined without necessarily including all of the transceivers 803 and Corresponding antenna group. For example, the transceiver 803 can include only baseband chips, radio frequency chips, and corresponding antennas to provide communication functionality in a cellular communication system. The wireless communication connection established via the transceiver 803, such as wireless local area network access or WCDMA access, may be connected to a cellular network or the internet. In some optional implementations of the present application, a communication module, such as a baseband module, in the transceiver 803 can be integrated into the processor, typically an APQ+MDM series platform such as that provided by Qualcomm. The radio frequency circuit is used for receiving and transmitting signals during information transmission and reception or during a call. For example, after the downlink information of the network device is received, it is processed by the processor; in addition, the data designed for the uplink is sent to the network device. Generally, the radio frequency circuit includes well-known circuits for performing these functions, including but not limited to an antenna system, a radio frequency transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a codec. (codec) chipset, Subscriber Identity Module (SIM) card, memory, etc. In addition, the RF circuit can communicate with the network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to a global system of mobile communication (GSM), a general packet radio service (gprs), and code division multiple access. (code division multiple access, CDMA for short), wideband code division multiple access (WCDMA), high speed uplink packet access (HSUPA), long-term evolution (long) Term evolution (LTE), e-mail, short messaging service (SMS), etc.

In the embodiment of the present application, the terminal device may be used to implement various method steps of the channel state information reference signal receiving method in the foregoing embodiment. The function to be implemented by the receiving unit 601 may be implemented by the transceiver 803 of the terminal device or by the transceiver 803 controlled by the processor 801; The implemented functions may also be implemented by the transceiver 803 of the terminal device, or may also be implemented by the transceiver 803 controlled by the processor 801; the functions to be implemented by the processing unit 802 may be implemented by the processor 601. .

In a specific implementation, the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, where the program may include each of a channel state information reference signal sending method or a channel state information reference signal receiving method provided by the present invention. Some or all of the steps in the examples. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM: ROM) or a random access memory (RAM).

It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. In particular, for the network device and the terminal device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant places can be referred to the description in the method embodiment.

The embodiments of the invention described above are not intended to limit the scope of the invention.

Claims

A channel state information reference signal sending method, comprising:

The network device determines the number of antenna ports corresponding to the channel state information reference signal CSI-RS resource;

The network device divides the antenna port corresponding to the number of antenna ports into at least two antenna port sets;

Determining, by the network device, a code division multiplexed CDM type corresponding to an antenna port in each of the at least two antenna port sets;

And the CSI-RS resource configuration information is used to indicate a CSI-RS corresponding to an antenna port in each antenna port set Resources and CDM types;

The network device sends the CSI-RS of the antenna port in the antenna port set according to the CDM type and the CSI-RS resource corresponding to each of the antenna ports.
The method of claim 1 wherein

In the at least two antenna port sets, the time-frequency resource densities corresponding to the antenna ports in the different antenna port sets are different.
The method of claim 2 wherein

And if the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets is higher than the time frequency corresponding to the antenna port of the second antenna port set in the at least two antenna port sets The resource density, then the CDM length corresponding to the first antenna port set is lower than the CDM length corresponding to the second antenna port set.
A method according to any one of claims 1 to 3, characterized in that

The number of antenna ports included in each of the at least two antenna port sets is 4 or 8.
A method according to any one of claims 1 to 4, characterized in that

If the CSI-RS resource density of the antenna port in the antenna port set is 1, the CDM length configured for the antenna port set is 2 or 4; or

If the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the day is The line port set configuration has a CDM length of 4 or 8.
A channel state information reference signal receiving method, comprising:

The terminal device receives the channel state information reference signal CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate the CSI-RS corresponding to the antenna port in each of the at least two antenna port sets. Resource and code division multiplexing CDM type;

The terminal device receives a CSI-RS of an antenna port in each of the antenna port sets according to a CSI-RS resource and a CDM type corresponding to an antenna port in each of the antenna port sets.
The method of claim 6 wherein the method further comprises:

The terminal device performs channel measurement according to the CSI-RS.
A method according to claim 6 or claim 7 wherein:

In the at least two antenna port sets, the time-frequency resource densities corresponding to the antenna ports in the different antenna port sets are different.
The method of claim 8 wherein:

And if the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets is higher than the time frequency corresponding to the antenna port of the second antenna port set in the at least two antenna port sets The resource density, then the CDM length corresponding to the first antenna port set is lower than the CDM length corresponding to the second antenna port set.
A method according to any one of claims 6 to 9, wherein

If the CSI-RS resource density of the antenna port in the antenna port set is 1, the CDM length configured for the antenna port set is 2 or 4; or

If the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the CDM length configured for the antenna port set is 4 or 8.
A network device, comprising:

a processing unit, configured to determine a number of antenna ports corresponding to the CSI-RS resource of the channel state information reference signal; divide the antenna port corresponding to the number of the antenna ports into at least two antenna port sets; and determine the at least two antenna port sets Code division multiplexing CDM class corresponding to each of the antenna port sets type;

a sending unit, configured to send, to the terminal device, CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate a CSI corresponding to an antenna port in each of the at least two antenna port sets The RS resource and the CDM type; the CSI-RS of the antenna port in the antenna port set is transmitted according to the CDM type corresponding to each of the antenna ports.
The network device of claim 11 wherein:

In the at least two antenna port sets, the time-frequency resource densities corresponding to the antenna ports in the different antenna port sets are different.
A network device according to claim 12, wherein

And if the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets is higher than the time frequency corresponding to the antenna port of the second antenna port set in the at least two antenna port sets The resource density, then the CDM length corresponding to the first antenna port set is lower than the CDM length corresponding to the second antenna port set.
A network device according to any one of claims 11 to 13, wherein

Each of the antenna port sets in each of the at least two antenna port sets includes an antenna port number of 4 or 8.
A network device according to any one of claims 11 to 14, wherein

If the CSI-RS resource density of the antenna port in the antenna port set is 1, the CDM length configured for the antenna port set is 2 or 4; or

If the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the CDM length configured for the antenna port set is 4 or 8.
A terminal device, comprising:

a receiving unit, configured to receive channel state information reference signal CSI-RS resource configuration information, where the CSI-RS resource configuration information is used to indicate an antenna port corresponding to each antenna port set in the at least two antenna port sets CSI-RS resource and code division multiplexing CDM type; receiving CSI-RS of each antenna port set in the antenna port set according to CSI-RS resources and CDM types corresponding to antenna ports in each of the antenna port sets.
The terminal device according to claim 16, further comprising:

And a processing unit, configured to perform channel measurement according to the CSI-RS of the antenna port in each of the antenna port sets.
A terminal device according to claim 16 or 17, wherein

In the at least two antenna port sets, the time-frequency resource densities corresponding to the antenna ports in the different antenna port sets are different.
The terminal device according to claim 18, characterized in that

And if the time-frequency resource density corresponding to the antenna port in the first antenna port set of the at least two antenna port sets is higher than the time frequency corresponding to the antenna port of the second antenna port set in the at least two antenna port sets The resource density, then the CDM length corresponding to the first antenna port set is lower than the CDM length corresponding to the second antenna port set.
A terminal device according to any one of claims 16 to 19, characterized in that

If the CSI-RS resource density of the antenna port in the antenna port set is 1, the CDM length configured for the antenna port set is 2 or 4; or

If the CSI-RS resource density of the antenna port in the antenna port set is less than 1, the CDM length configured for the antenna port set is 4 or 8.