CN111769900A - Method and device for scheduling channel state information reference signal - Google Patents
Method and device for scheduling channel state information reference signal Download PDFInfo
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- CN111769900A CN111769900A CN201910256900.5A CN201910256900A CN111769900A CN 111769900 A CN111769900 A CN 111769900A CN 201910256900 A CN201910256900 A CN 201910256900A CN 111769900 A CN111769900 A CN 111769900A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Abstract
The invention provides a scheduling method and a scheduling device of a channel state information reference signal, which are used for solving the problems of reduced frequency spectrum utilization rate and increased energy consumption and interference in the prior art. The method comprises the following steps: the method comprises the steps that access network equipment determines the service transmission condition and/or the channel quality change condition of terminal equipment which has access to the access network equipment, wherein the service transmission condition of the terminal equipment is used for representing whether the terminal equipment has service data to be transmitted or not; the access network equipment adjusts the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment; and the access network equipment sends CSI-RS to the terminal equipment according to the adjusted time interval.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for scheduling a channel state information reference signal.
Background
Massive Multiple-Input Multiple-Output (Massive Multiple-Input Multiple-Output) is used as a key technology of an NR (New Radio) system, and can improve the spectrum utilization rate and improve the user experience. The flexible downlink reference signal design can improve MassiveMIMO coverage gain, and further improve user experience and cell capacity. The aperiodic CSIRS (Channel-State information reference signal) in the NR system may be transmitted only in the user connection State or when the user has traffic scheduling, thereby reducing the base station side energy consumption and networking interference, and being more suitable for multi-antenna port transmission of the MassiveMIMO system.
The base station side triggers and schedules the non-periodic CSIRS for transmission at a fixed time interval, but the time interval is set to be longer, which can cause that the terminal side cannot match the channel environment in time, the forming gain is reduced, and the user experience is deteriorated; however, the time interval is set to be shorter, so that the frequency spectrum utilization rate is reduced, and the energy consumption and networking interference of the base station side are increased.
Disclosure of Invention
The invention provides a scheduling method and a scheduling device of a channel state information reference signal, which are used for solving the problems of reduced frequency spectrum utilization rate and increased energy consumption and interference in the prior art.
In a first aspect, the present invention provides a method for scheduling csi-rs, including:
the method comprises the steps that access network equipment determines the service transmission condition and/or the channel quality change condition of terminal equipment which has access to the access network equipment, wherein the service transmission condition of the terminal equipment is used for representing whether the terminal equipment has service data to be transmitted or not;
the access network equipment adjusts the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment;
and the access network equipment sends CSI-RS to the terminal equipment according to the adjusted time interval.
In an optional implementation manner, the adjusting, by the access network device, a time interval for triggering sending of the CSI-RS to the terminal device according to a service transmission condition and/or a channel quality change condition of the terminal device includes:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than a preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality change value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
In an optional implementation manner, the channel quality change value is a difference between a channel quality indicator CQI fed back by the terminal device and a CQI fed back by the terminal device last time, where the channel quality change value is received by the access network device, and the CQI is used to indicate a measurement result obtained by the terminal device performing channel measurement according to the received CSI-RS sent by the access network device.
In an alternative implementation, the third value is determined based on the channel quality variation value.
In an optional implementation manner, the CSI-RS is an aperiodic CSI-RS.
In a second aspect, an embodiment of the present invention provides a scheduling apparatus for a channel state information reference signal, where the apparatus is applied to an access network device, and includes:
a determining module, configured to determine a service transmission condition and/or a channel quality change condition of a terminal device that has accessed the access network device, where the service transmission condition of the terminal device is used to characterize whether service data to be transmitted exists in the terminal device;
the adjusting module is used for adjusting the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment determined by the determining module;
and the sending module is used for sending the CSI-RS to the terminal equipment according to the time interval adjusted by the adjusting module.
In an optional implementation manner, the adjusting module is specifically configured to:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value; or
If the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
In an optional implementation manner, the channel quality change value is a difference between a channel quality indicator CQI fed back by the terminal device and a CQI fed back by the terminal device last time, where the channel quality change value is received by the access network device, and the CQI is used to indicate a measurement result obtained by the terminal device performing channel measurement according to the received CSI-RS sent by the access network device.
In an alternative implementation, the third value is determined based on the channel quality variation value.
In an optional implementation manner, the CSI-RS is an aperiodic CSI-RS.
In a third aspect, an embodiment of the present invention provides an access network device, including:
a memory and a processor;
a memory for storing program instructions;
and the processor is used for calling the program instructions stored in the memory and executing the method of any implementation mode of the first aspect according to the obtained program.
In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the above method.
In the embodiment of the invention, the sending time interval of the CSI-RS is adjusted by acquiring the service scheduling condition of the terminal equipment and the channel quality condition, so that the problems of the reduction of the forming gain, the reduction of the frequency spectrum utilization rate, the increase of the energy consumption of the base station side and the networking interference caused by sending the CSI-RS at a fixed time point can be avoided to a certain extent.
Drawings
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for scheduling csi-rs according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another scheduling method of csi-rs according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a scheduling apparatus for csi reference signals according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an access network device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention can be applied to a 4G system, a 5G system or a new system generated in the future. The 4G system may be a Long Term Evolution (LTE) system, and the 5G system may be a New Radio (NR) system.
Fig. 1 illustrates an architecture of a communication system including an access network device and a terminal device.
A Terminal device, also called a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a User, for example, a handheld device, a vehicle-mounted device, etc. with a wireless connection function. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable Device, a Virtual Reality (VR) Device, an Augmented Reality (AR) Device, a wireless terminal in Industrial Control (Industrial Control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety, a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.
The access network device related in the embodiment of the present invention may also be referred to as a base station or AN access node (access node, abbreviated as AN) to provide a wireless access service for the terminal. The Access Node may be a Base Transceiver Station (BTS) in a global system for Mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, a Base Station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or eNodeB) in an LTE system, or a Base Station device (gbb), a small Base Station device, a wireless Access Node (WiFi AP), a wireless interworking Microwave Access Base Station (WiMAX BS) in a future 5G network, which is not limited in this respect.
The plurality of the present invention means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean:
a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. In addition, it should be understood that although the terms first, second, etc. may be used to describe the packets in the embodiments of the present invention, the packets should not be limited to these terms. These terms are only used to distinguish packets from each other.
The embodiment of the invention can be applied to MassiveMIMO application scenes. The communication system may use the CSI-RS to determine the channel state. The CSI-RS may be transmitted on a periodic, aperiodic basis.
The existing base station side triggers and schedules the sending and the analysis of the aperiodic CSI-RS only at a fixed time point. And only in a fixed time band, you trigger and schedule the CSIRS, so that the flexibility of the aperiodic CSI-RS design cannot be embodied. If the sending period of the non-periodic CSI-RS is too long, the channel environment cannot be matched in time, the forming gain is reduced, and the user experience is poor; if the non-periodic CSIRS sending period is too short, the frequency spectrum utilization rate is reduced, and the energy consumption and networking interference of a base station side are increased.
Based on this, embodiments of the present invention provide a method and an apparatus for scheduling a channel state information reference signal, which adjust a sending time interval of a CSI-RS by obtaining a service scheduling condition of a terminal device and a channel quality condition, and can avoid, to a certain extent, problems of a decrease in a forming gain and a spectrum utilization rate, an increase in energy consumption and networking interference at a base station side, which are caused by sending the CSI-RS at a fixed time point. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
Referring to fig. 2, a flowchart of a scheduling method of csi-rs according to an embodiment of the present invention is shown. The method comprises the following steps:
s201, an access network device determines a service transmission condition and/or a channel quality change condition of a terminal device which has accessed to the access network device, wherein the service transmission condition of the terminal device is used for representing whether the terminal device has service data to be transmitted or not.
Illustratively, the Channel Quality Indication change condition may be reflected by the terminal device according to a change of a CQI (Channel Quality Indication) fed back by the CSI-RS received twice.
S202, the access network equipment adjusts the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment.
S203, the access network equipment sends CSI-RS to the terminal equipment according to the adjusted time interval.
Wherein the CSI-RS may be an aperiodic CSI-RS.
In an optional implementation manner, the adjusting, by the access network device, a time interval for triggering sending of the CSI-RS to the terminal device according to a service transmission condition and/or a channel quality change condition of the terminal device includes:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than a preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value, wherein the second value is smaller than the first value; or
If the service data to be transmitted exists on the terminal equipment and the channel quality change value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
Illustratively, the first value range may be 10s-600s, and may be dynamically configured and modifiable according to requirements. The second value may range from 0.1s to 10 s. The third value may range from 0.005s to 0.1 s.
The channel quality change value is a difference between a Channel Quality Indicator (CQI) fed back by the terminal device and a CQI fed back by the terminal device last time, which are received by the access network device, and the CQI is used for indicating a measurement result obtained by the terminal device performing channel measurement according to the received CSI-RS sent by the access network device.
The following describes embodiments of the present invention in detail with reference to application scenarios, and an aperiodic CSI-RS is taken as an example for description.
Referring to fig. 3, a flowchart of a method for scheduling a csi reference signal according to an embodiment of the present invention is shown.
S301, after the access network device determines that the terminal device is accessed, whether the terminal device has the service data to be transmitted is judged. If yes, go to step S302, otherwise go to step S303.
The access network equipment adjusts the size of a time interval for sending the aperiodic CSI-RS according to the frequency degree of service scheduling.
In addition, when the access network equipment determines that no terminal equipment is accessed, the transmission of the aperiodic CSI-RS of the terminal equipment is not triggered.
And S302, sending the aperiodic CSI-RS to the terminal equipment according to the second time interval. The second time interval is equal to a second value, for example the second value may range from 0.1s to 10 s. Wherein, the more frequent the service scheduling, the shorter the time interval for transmitting the aperiodic CSI. S304 is performed.
S303, sending the aperiodic CSI-RS to the terminal equipment according to the first time interval. S301 is executed. The first time interval is equal to the first value, for example the first value may range from 10s to 600 s.
S304, the access network device determines whether the channel quality variation value is smaller than a preset threshold, if so, executes S302, and if not, executes S305.
Optionally, when the access network device determines that the terminal device has service data transmission and the channel quality variation value is smaller than the preset threshold, the value of the second time interval may be reduced within the range of the second value.
And S305, adjusting to send the aperiodic CSI-RS to the terminal equipment according to the third time interval. S304 or S301 is executed.
The channel quality change value is greater than or equal to the preset threshold value, that is, the change of the CQI value is large twice continuously, which indicates that the channel environment changes fast, so that the transmission frequency of the aperiodic CSI-RS is increased, that is, the time interval for transmitting the aperiodic CSI-RS is adjusted, and the third time interval is adjusted from the second time interval. The channel quality change value is smaller than the preset threshold value, that is, the CQI value is relatively stable, which indicates that the channel environment changes slowly, and the value of the second time interval can be reduced within the range of the second value.
The service data to be transmitted exists on the terminal device, and the change of the CQI value reported by the terminal device based on the CSIRS measurement is faster, so that the sending time interval of the aperiodic CSIRS can be properly reduced, and the faster the change of the CQI value is, the smaller the third time interval T3(0.005 s-0.1 s) of the access network device sending the aperiodic CSIRS is.
Illustratively, the third time interval may be determined according to a difference between two consecutive CQI values. It should be understood that the CQI value range is typically an integer from 0 to 15, and the absolute value of the CQI reporting difference value range is also an integer from 0 to 15. And determining a third time period T3 to be (0.1-Vcqi 0.006) s according to the fact that the absolute value Vcqi of the CQI difference reported twice is an integer of 0-15.
Based on the same inventive concept as the method embodiment, an embodiment of the present invention provides a scheduling apparatus for a channel state information reference signal, where the apparatus 400 is applied to an access network device, and as shown in fig. 4, the apparatus includes:
a determining module 401, configured to determine a service transmission condition and/or a channel quality change condition of a terminal device that has accessed the access network device, where the service transmission condition of the terminal device is used to represent whether the terminal device has service data to be transmitted;
an adjusting module 402, configured to adjust a time interval for sending channel state information-reference signal CSI-RS to the terminal device according to the service transmission condition and/or the channel quality change condition of the terminal device determined by the determining module 401;
a sending module 403, configured to send CSI-RS to the terminal device according to the time interval adjusted by the adjusting module 402.
In an optional implementation manner, the adjusting module 402 is specifically configured to:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value; or
If the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
In an optional implementation manner, the channel quality change value is a difference between a channel quality indicator CQI fed back by the terminal device and a CQI fed back by the terminal device last time, where the channel quality change value is received by the access network device, and the CQI is used to indicate a measurement result obtained by the terminal device performing channel measurement according to the received CSI-RS sent by the access network device.
In an alternative implementation, the third value may be determined based on the channel quality variation value.
In an optional implementation manner, the CSI-RS is an aperiodic CSI-RS.
An embodiment of the present invention further provides another access network device, as shown in fig. 5, including:
a communication interface 501, a memory 502, and a processor 503;
the processor 503 communicates with other devices through the communication interface 501, for example, the other devices may be terminal devices, and the processor 503 may send CSI-RS to the terminal devices through the communication interface 501; a memory 502 for storing program instructions; the processor 503 is configured to invoke the program instructions stored in the memory 502, and execute the method executed by the access network device (or the base station) in the foregoing embodiments according to the obtained program.
In the embodiment of the present application, the specific connection medium among the communication interface 501, the memory 502, and the processor 503 is not limited, for example, a bus may be divided into an address bus, a data bus, a control bus, and the like.
In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (e.g., a random-access memory (RAM)). The memory can also be, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
In the embodiment of the invention, the sending time interval of the CSI-RS is adjusted by acquiring the service scheduling condition of the terminal equipment and the channel quality condition, so that the problems of the reduction of the forming gain, the reduction of the frequency spectrum utilization rate, the increase of the energy consumption of the base station side and the networking interference caused by sending the CSI-RS at a fixed time point can be avoided to a certain extent.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for scheduling CSI-RS (channel State information reference signals), comprising:
the method comprises the steps that access network equipment determines the service transmission condition and/or the channel quality change condition of terminal equipment which has access to the access network equipment, wherein the service transmission condition of the terminal equipment is used for representing whether the terminal equipment has service data to be transmitted or not;
the access network equipment adjusts the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment;
and the access network equipment sends CSI-RS to the terminal equipment according to the adjusted time interval.
2. The method of claim 1, wherein the adjusting, by the access network device, the time interval for triggering the CSI-RS to be sent to the terminal device according to the traffic transmission condition and/or the channel quality change condition of the terminal device comprises:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than a preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value, wherein the second value is smaller than the first value; or
If the service data to be transmitted exists on the terminal equipment and the channel quality change value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
3. The method of claim 2, wherein the channel quality variation value is a difference between a Channel Quality Indicator (CQI) fed back by the terminal device and a CQI fed back by the terminal device last time, which are received by the access network device, and the CQI is used for indicating a measurement result obtained by the terminal device performing channel measurement according to a received CSI-RS sent by the access network device.
4. The method of claim 3, wherein the third value is determined based on the channel quality variation value.
5. The method of any of claims 1-4, wherein the CSI-RS is an aperiodic CSI-RS.
6. A scheduling apparatus of a CSI-RS, wherein the apparatus is applied to an access network device, and comprises:
a determining module, configured to determine a service transmission condition and/or a channel quality change condition of a terminal device that has accessed the access network device, where the service transmission condition of the terminal device is used to characterize whether service data to be transmitted exists in the terminal device;
the adjusting module is used for adjusting the time interval for sending the channel state information-reference signal CSI-RS to the terminal equipment according to the service transmission condition and/or the channel quality change condition of the terminal equipment determined by the determining module;
and the sending module is used for sending the CSI-RS to the terminal equipment according to the time interval adjusted by the adjusting module.
7. The apparatus of claim 6, wherein the adjustment module is specifically configured to:
if the service data to be transmitted does not exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exist on the terminal equipment, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a second value, wherein the second value is smaller than the first value; alternatively, the first and second electrodes may be,
if the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be smaller than the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be the second value; or
If the service data to be transmitted exists on the terminal equipment and the channel quality variation value is determined to be greater than or equal to the preset threshold value, adjusting the time interval for sending the CSI-RS to the terminal equipment to be a third value, wherein the third value is smaller than the second value;
wherein the first value, the second value, and the third value are all greater than 0.
8. The apparatus of claim 7, wherein the channel quality variation value is a difference between a Channel Quality Indicator (CQI) fed back by the terminal device and a CQI fed back by the terminal device last time, which are received by the access network device, and the CQI is used to indicate a measurement result obtained by the terminal device performing channel measurement according to a received CSI-RS sent by the access network device.
9. The apparatus of claim 8, wherein the third value is determined based on the channel quality variation value.
10. The apparatus of any one of claims 6-9, wherein the CSI-RS is an aperiodic CSI-RS.
11. An access network device, comprising:
a memory and a processor;
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing the method of any one of claims 1 to 5 according to the obtained program.
12. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 5.
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