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CN115119257A - Method, device, equipment and storage medium for triggering CSI-RS (channel State information-reference Signal) sending - Google Patents

Method, device, equipment and storage medium for triggering CSI-RS (channel State information-reference Signal) sending Download PDF

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Publication number
CN115119257A
CN115119257A CN202110309046.1A CN202110309046A CN115119257A CN 115119257 A CN115119257 A CN 115119257A CN 202110309046 A CN202110309046 A CN 202110309046A CN 115119257 A CN115119257 A CN 115119257A
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csi
target
channel
sending
decoding
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CN115119257B (en
Inventor
许丽玉
章钱
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Chenxin Technology Co ltd
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Chenxin Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • 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
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a method, a device, equipment and a storage medium for triggering CSI-RS (channel state information-reference signal) sending, wherein the method comprises the following steps: under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel has effective Channel State Information (CSI); if the bit error rate of the target UE decoding, the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions, sending of a channel state information reference signal (CSI-RS) is not triggered; and if not, triggering the sending of the CSI-RS so that the target UE feeds back the CSI. The technical scheme provided by the embodiment of the invention can reduce the processing frequency of the CSI-RS and improve the processing performance of the UE.

Description

Method, device, equipment and storage medium for triggering CSI-RS (channel state information-reference signal) transmission
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method, a device, equipment and a storage medium for triggering CSI-RS (channel state information-reference signal) sending.
Background
In the application of Long Time Evolution-Vehicle to Evolution (LTE-V2X) technology, only broadcast transmission is supported, and in the Next generation Vehicle networking (NR-V2X), not only broadcast transmission but also multicast and unicast transmission are supported. In the case of unicast transmission, in order to effectively improve transmission efficiency, a User Equipment (UE) at a home terminal may perform flexible scheduling according to Channel environment Information of a target UE, and introduce a non-periodic Channel State Information (CSI) feedback technique, where the target UE needs to feed back a Channel Quality Indicator (CQI) and a Rank indicator (Rank Indication, RI) to the UE at the home terminal according to a measurement result of a Channel State Information Reference Signal (CSI-RS).
Wherein, the specific flow is as follows: the local terminal UE sets a CSI request field to be 1 in an SCI format 2-A and simultaneously sends CSI-RS to the target UE; and after the target UE acquires the CSI request, estimating the CSI-RS to acquire the CQI and the RI, and feeding back the CQI and the RI to the local terminal UE. The local terminal UE selects whether to use layering or not according to the fed back RI in combination with the size of the data volume to be sent; and adjusting a Modulation and Coding Scheme (MCS) of the UE of the local terminal in real time according to the fed-back CQI, so as to avoid the use of a code rate which is not matched with the channel state by the UE of the local terminal and cause a high-probability error code of the target UE. However, the above scheme frequently sending CSI-RS increases code rate, affects data decoding success rate, and also increases load of the target UE, thereby affecting performance.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for triggering CSI-RS (channel state information-reference signal) sending, which can reduce the processing frequency of CSI-RS and improve the processing performance of UE (user equipment).
In a first aspect, an embodiment of the present invention provides a method for triggering CSI-RS transmission, including:
under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel has effective Channel State Information (CSI);
if the target UE receives the channel state information reference signal CSI-RS, the target UE decodes the channel state information reference signal CSI-RS, and the error rate of the target UE, the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions, the sending of the channel state information reference signal CSI-RS is not triggered;
and if not, triggering the sending of the CSI-RS so that the target UE feeds back the CSI.
In a second aspect, an embodiment of the present invention further provides an apparatus for triggering CSI-RS transmission, including:
the judging module is used for judging whether the selected sub-channel has effective Channel State Information (CSI) or not under the condition of sending data to target User Equipment (UE);
the first triggering module is used for not triggering the sending of a channel state information reference signal CSI-RS if the error rate of target UE decoding, the ratio of the times of sending data to the target UE and receiving decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions;
and if not, triggering the sending of the CSI-RS so as to enable the target UE to feed back the CSI.
In a third aspect, an embodiment of the present invention provides a user equipment, including:
one or more processors;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the methods provided by the embodiments of the present invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method provided by the embodiment of the present invention.
According to the technical scheme provided by the embodiment of the invention, under the condition that data is sent to the target User Equipment (UE), if the selected sub-channel is judged to have effective CSI, and the error rate of decoding of the target UE, the ratio of the number of times of sending the data to the target UE and receiving decoding feedback information fed back by the target UE and the channel busy rate meet preset conditions, the sending of a channel state information reference signal (CSI-RS) is not triggered, the processing frequency of the CSI-RS can be reduced, and the processing performance of the UE is improved.
Drawings
Fig. 1a is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention;
fig. 1b is a diagram of the CSI, the CSI acquisition time, and the sub-channel mapping;
fig. 1c is a CSI initialization flow diagram;
fig. 1d is a CSI update flow chart;
fig. 2a is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention;
fig. 2b is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention;
fig. 2c is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention;
fig. 3 is a block diagram of an apparatus for triggering CSI-RS transmission according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Fig. 1a is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention, where the method may be performed by an apparatus for triggering CSI-RS transmission, where the apparatus may be implemented by software and/or hardware, and the apparatus may be configured in a User Equipment (UE), where the user equipment may be a vehicle in a vehicle network, and the method may be applied in a scenario where the UE transmits data.
As shown in fig. 1a, the technical solution provided by the embodiment of the present invention includes:
s110: and under the condition of transmitting data to the target user equipment UE, judging whether the selected sub-channel has effective channel state information CSI.
If yes, go to step S120, otherwise go to step S130.
In the embodiment of the present invention, the target UE may be a UE communicating with the local UE, for example, a target vehicle, or may also be another UE communicating with the local UE.
In the embodiment of the present invention, if the local UE needs to communicate with the target UE, the local UE may send data to the target UE, and when sending data to the target UE, the local UE needs to determine information related to the selected sub-channel, so as to determine whether sending of the CSI-RS needs to be triggered, so that the target UE feeds back the CSI. The fed back CSI includes a Channel Quality Indication (CQI) and an RI.
In this embodiment of the present invention, optionally, before sending data, the UE at the local end may further include: creating a corresponding relationship between the CSI and the CSI acquisition time and the sub-channel, and initializing the CSI and the CSI acquisition time to an invalid value, for example, referring to fig. 1b for the CSI and the CSI acquisition time and the sub-channel for the corresponding relationship, and referring to fig. 1c for the CSI initialization process. When receiving data, the local UE can analyze MAC information fed back by the target UE, update the latest CSI by using CSI in the MAC information, and update the acquisition time of the latest CSI by using the time for receiving the MAC information. The CSI and the CSI acquisition time are initialized to be invalid values, so that the CSI-RS is required to be transmitted to acquire the CSI fed back by the target UE when data is transmitted. When the local UE receives data of the target UE, the local UE parses Media Access Control (MAC) header information in a Physical downlink Shared Channel (pscch), obtains CSI of a sub-Channel corresponding to the target UE in the MAC header, updates the last CSI, and updates the last CSI obtaining time by using the obtaining time of the MAC information, so as to determine validity of the CSI according to the obtaining time of the CSI. Fig. 1d may be referred to herein for a flow of updating CSI.
In this embodiment of the present invention, before determining whether the selected subchannel has an effective CSI value, the method further includes: judging whether the selected sub-channel receives CSI or not; if not, not triggering the sending of the CSI-RS; correspondingly, the determining whether valid CSI exists for the selected sub-channel includes: and if the selected sub-channel receives the CSI, judging whether the selected sub-channel has effective CSI. Wherein the selected sub-channel may be one or more. When the local UE sends data, it needs to select a sub-channel and determine whether the selected sub-channel receives CSI fed back by the target UE. And if the CSI fed back by the target UE is received, further judging the validity of the received CSI. If the CSI fed back by the target UE is not received, the sending of the CSI-RS needs to be triggered to acquire the CSI fed back by the target UE.
In an implementation manner of the embodiment of the present invention, optionally, the determining whether the selected subchannel has valid CSI includes: judging whether the acquisition time of the CSI received by the sub-channel is less than a preset time threshold value or not; if so, then valid CSI is present. The preset time threshold may be set empirically. When the acquisition time of the CSI received by the sub-channel is longer than a preset time threshold, if the sub-channel environment is considered to be changed and the CSI is unreliable, the sending of the CSI-RS needs to be triggered again to acquire the CSI fed back by the target UE; if the acquisition time of the CSI is less than the preset time threshold, the CSI-RS can be continuously used without triggering the sending of the CSI-RS.
S120: and if the error rate of target UE decoding, the ratio of times of sending data to the target UE and receiving decoding feedback information fed back by the target UE and the channel busy rate meet preset conditions, sending of a channel state information reference signal CSI-RS is not triggered.
In an implementation manner of the embodiment of the present invention, optionally, if the bit error rate of the target UE decoding, the ratio of the number of times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE, and the channel busy rate satisfy a preset condition, the sending of the channel state information reference signal CSI-RS is not triggered, including: if the following conditions are met, the CSI-RS is not triggered to be transmitted: the error rate of target UE decoding is smaller than a preset threshold; the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset ratio; the channel busy rate CBR is smaller than a preset busy rate threshold value.
When the target UE receives data sent by the local terminal UE, the data is decoded, and when the decoding is successful, ACK information is fed back to the local terminal UE; and if the decoding fails, feeding back NACK information to the local terminal UE. And the local terminal UE can calculate the error rate of target UE decoding according to the received ACK information and NACK information. When the error rate is greater than the preset threshold, it is considered that the estimated CSI may be inaccurate, and the CSI needs to be updated again, so that sending of the CSI-RS needs to be triggered again to acquire the CSI fed back by the target UE.
In the communication process between the local UE and the target UE, decoding feedback information (ACK information or NACK information) fed back by the target UE may be received, and the local UE may communicate with other UEs besides communicating with the target UE, and may also feed back the decoding feedback information to other UEs (where the decoding feedback information may be received or sent through PSFCH), so that the other UEs know the decoding condition of the local UE, and therefore the decoding feedback information received by the local UE may be collided by the high-priority decoding feedback information sent by the local UE; in the case of a conflict, there may be a case where the decoding feedback information fed back by the target UE is not received, and in the case where a ratio of times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset ratio, it may be considered that no conflict occurs, a channel state does not change, and it may not be necessary to trigger sending of the CSI-RS, and if the ratio of times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is larger than the preset ratio, in order to confirm whether the channel state changes, sending of the CSI-RS needs to be retriggered to acquire CSI fed back by the target UE. Or when the decoding feedback information is not received within a preset time period, in order to confirm whether the channel state changes, the sending of the CSI-RS also needs to be triggered to acquire the CSI fed back by the target UE.
The selection of resources in the internet of vehicles is performed autonomously by the home-end UE, and a channel may be very busy in a period of time, so that the probability of collision also increases, and therefore, whether to trigger the sending of the CSI-RS to obtain the CSI fed back by the target UE needs to consider a Channel Busy Rate (CBR), if the CBR is greater than a preset busy rate threshold, it is considered that the probability of collision increases, and the channel quality needs to be reevaluated, and therefore, the sending of the CSI-RS needs to be triggered to enable the target UE to feed back the CSI, and if the CBR is less than the preset busy rate threshold, it is considered that the sending of the CSI-RS has a smaller collision rate, and the sending of the CSI-RS may not be triggered. Therefore, the following condition needs to be satisfied, and the transmission of the CSI-RS is not triggered: the error rate of target UE decoding is smaller than a preset threshold; the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset ratio; the channel busy rate CBR is smaller than a preset busy rate threshold value.
S130: triggering transmission of CSI-RS to enable the target UE to feed back CSI.
In the embodiment of the invention, if the selected sub-channel is judged to have no effective CSI, the sending of the CSI-RS is triggered so that the target UE feeds back the CSI.
In the related art, the CSI-RS is transmitted at the cost of data puncturing, the frequent transmission of the CSI-RS increases the code rate, affects the success rate of data decoding, and increases the load of the target UE.
According to the technical scheme provided by the embodiment of the invention, under the condition that data is sent to the target User Equipment (UE), if the selected sub-channel is judged to have effective CSI, and the error rate of decoding of the target UE, the ratio of the times of sending the data to the target UE and receiving decoding feedback information fed back by the target UE and the channel busy rate meet preset conditions, the sending of a channel state information reference signal (CSI-RS) is not triggered, the processing of the CSI-RS is reduced as much as possible on the premise of accurately acquiring the channel transmission quality, resources occupied by the CSI-RS are saved and used for a data channel, the code rate is reduced, the decoding performance is improved, the frequency of processing the CSI-RS by the target UE is reduced, and the capacity of receiving a plurality of UEs is improved.
Fig. 2a is a flowchart of a method for triggering CSI-RS transmission according to an embodiment of the present invention, where in this embodiment, optionally, if an error rate of decoding by the target UE, a ratio of times of sending data to the target UE and receiving decoding feedback information fed back by the target UE, and a channel busy rate satisfy a preset condition, the method does not trigger transmission of a channel state information reference signal CSI-RS, and includes:
judging whether the error rate of target UE decoding is smaller than a preset threshold value or not;
if yes, judging whether the frequency proportion of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset proportion or not;
if yes, whether the channel busy rate is smaller than a preset busy rate threshold value or not;
if so, not triggering the transmission of the CSI-RS.
Optionally, the method may further include: if the error rate of the target UE decoding is not greater than a preset threshold value, the CSI-RS is not triggered to be sent;
if the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is not greater than a preset ratio, the CSI-RS is not triggered to be sent;
and if the CBR is larger than a preset busy rate threshold value, not triggering the sending of the CSI-RS.
Optionally, the method provided in the embodiment of the present invention may further include:
judging whether the selected sub-channel receives CSI or not;
if not, triggering the sending of the CSI-RS;
correspondingly, the determining whether the selected sub-channel has valid CSI includes:
and if the selected sub-channel receives the CSI, judging whether the selected sub-channel has effective CSI.
As shown in fig. 2a, the technical solution provided by the embodiment of the present invention includes:
s210: under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel receives CSI or not;
if not, go to step S220, and if so, go to step S230.
S220: triggering transmission of the CSI-RS.
S230: and judging whether the selected sub-channel has effective CSI.
If yes, go to S240, otherwise go to S220.
S240: and judging whether the error rate of target UE decoding is less than a preset threshold value.
If yes, go to step S250, otherwise, go to step S220.
S250: judging whether the frequency proportion of sending data to target UE and receiving decoding feedback information fed back by the target UE is smaller than a preset proportion or not;
if yes, go to step S260, otherwise go to step S220.
S260: whether the channel busy rate is less than a preset busy rate threshold value.
If yes, go to S270; if not, go to step S220.
S270: transmission of the CSI-RS is not triggered.
Fig. 2b and fig. 2c may be referred to for a method provided by an embodiment of the present invention.
According to the technical scheme provided by the embodiment of the invention, under the condition of sending data to the target User Equipment (UE), if the selected sub-channel receives the CSI, the validity of the CSI is judged, if the CSI is judged to be valid and the error rate of the target decoding is smaller than the preset threshold value, the ratio of the times of sending the data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than the preset ratio, and the busy condition of the channel is smaller than the preset busy rate threshold value, the sending of the CSI-RS is not triggered, the processing of the CSI-RS can be reduced as much as possible on the premise of accurately obtaining the transmission quality of the channel, resources occupied by the CSI-RS are saved and used for the data channel, so that the code rate is reduced, the decoding performance is improved, the frequency of the target UE for processing the CSI-RS is reduced, and the capacity of receiving a plurality of UEs is improved.
Fig. 3 is a block diagram of an apparatus for triggering CSI-RS transmission according to an embodiment of the present invention, and as shown in fig. 3, the apparatus according to the embodiment of the present invention includes a determining module 310, a first triggering module 320, and a second triggering module 330.
The determining module 310 is configured to determine whether the selected sub-channel has valid CSI when transmitting data to the target UE;
the first triggering module 320 is configured to not trigger sending of a channel state information reference signal CSI-RS if the error rate of target UE decoding, the ratio of times of sending data to the target UE and receiving decoding feedback information fed back by the target UE, and the channel busy rate satisfy preset conditions;
a second triggering module 330, configured to trigger sending of the CSI-RS if not, so that the target UE feeds back the CSI.
Optionally, if the bit error rate of the target UE decoding, the ratio of the number of sending data to the target UE and receiving the decoding feedback information fed back by the target UE, and the channel busy rate satisfy preset conditions, the sending of the channel state information reference signal CSI-RS is not triggered, including:
if the following conditions are met, the CSI-RS is not triggered to be transmitted:
the error rate of target UE decoding is smaller than a preset threshold;
the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset ratio;
the channel busy rate is less than a preset busy rate threshold.
Optionally, the determining module 310 is further configured to:
judging whether the selected sub-channel receives CSI or not;
if not, triggering the sending of the CSI-RS;
correspondingly, the determining whether the selected sub-channel has valid CSI includes:
and if the selected sub-channel receives the CSI, judging whether the selected sub-channel has effective CSI.
Optionally, the determining whether the selected sub-channel has valid CSI includes:
judging whether the acquisition time of the CSI received by the selected sub-channel is less than a preset time threshold value or not;
if so, then valid CSI is present.
Optionally, the apparatus further comprises:
the device comprises a creating module, a judging module and a judging module, wherein the creating module is used for creating a corresponding relation among CSI, CSI acquisition time and a sub-channel, and initializing the CSI and the CSI acquisition time into invalid values;
and the updating module is used for analyzing the MAC information fed back by the target UE, updating the latest CSI by adopting the CSI in the MAC information, and updating the acquisition time of the latest CSI by adopting the time for receiving the MAC information.
Optionally, if the bit error rate of the target UE decoding, the ratio of the number of sending data to the target UE and receiving the decoding feedback information fed back by the target UE, and the channel busy rate satisfy preset conditions, the sending of the channel state information reference signal CSI-RS is not triggered, including:
judging whether the error rate of the target UE decoding is smaller than a preset threshold value or not;
if yes, judging whether the frequency proportion of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset proportion or not;
if so, whether the channel busy rate is smaller than a preset busy rate threshold value or not;
and if so, not triggering the CSI-RS to be transmitted.
Optionally, the second triggering module 330 is further configured to:
if the error rate of the target UE decoding is not greater than a preset threshold value, the CSI-RS is not triggered to be sent;
if the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is not greater than a preset ratio, the CSI-RS is not triggered to be sent;
and if the channel busy rate is greater than a preset busy rate threshold value, not triggering the sending of the CSI-RS.
The device can execute the method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 4 is a schematic structural diagram of an apparatus provided in an embodiment of the present invention, and as shown in fig. 4, the apparatus includes:
one or more processors 410, one processor 410 being illustrated in FIG. 4;
a memory 420;
the apparatus may further include: an input device 430 and an output device 440.
The processor 410, the memory 420, the input device 430 and the output device 440 in the apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 4.
The memory 420 may be used as a non-transitory computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules (e.g., the determining module 310, the first triggering module 320, and the second triggering module 330 shown in fig. 3) corresponding to a method for triggering CSI-RS transmission according to an embodiment of the present invention. The processor 410 executes various functional applications and data processing of the computer device by executing the software programs, instructions and modules stored in the memory 420, namely, implementing a method for triggering CSI-RS transmission of the above method embodiment, that is:
under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel has effective Channel State Information (CSI);
if the target UE receives the channel state information reference signal CSI-RS, the target UE decodes the channel state information reference signal CSI-RS, and the error rate of the target UE, the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions, the sending of the channel state information reference signal CSI-RS is not triggered;
if not, triggering the sending of the CSI-RS so that the target UE feeds back the CSI.
The memory 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the computer device, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 420 may optionally include memory located remotely from processor 410, which may be connected to the terminal device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. The output device 440 may include a display device such as a display screen.
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for triggering CSI-RS transmission, according to an embodiment of the present invention:
under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel has effective Channel State Information (CSI);
if the bit error rate of the target UE decoding, the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions, sending of a channel state information reference signal (CSI-RS) is not triggered;
if not, triggering the sending of the CSI-RS so that the target UE feeds back the CSI.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims (10)

1. A method of triggering CSI-RS transmission, comprising:
under the condition of sending data to target User Equipment (UE), judging whether the selected sub-channel has effective Channel State Information (CSI);
if the target UE receives the channel state information reference signal CSI-RS, the target UE decodes the channel state information reference signal CSI-RS, and the error rate of the target UE, the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE and the channel busy rate meet the preset conditions, the sending of the channel state information reference signal CSI-RS is not triggered;
and if not, triggering the sending of the CSI-RS so that the target UE feeds back the CSI.
2. The method of claim 1, wherein if the bit error rate of the target UE decoding, the ratio of the number of times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE, and the channel busy rate satisfy a preset condition, the sending of the CSI-RS is not triggered, comprising:
if the following conditions are met, the sending of the CSI-RS is not triggered:
the error rate of target UE decoding is smaller than a preset threshold;
the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset ratio;
the channel busy rate is less than a preset busy rate threshold.
3. The method of claim 1, further comprising:
judging whether the selected sub-channel receives CSI or not;
if not, triggering the sending of the CSI-RS;
correspondingly, the determining whether the selected sub-channel has valid CSI includes:
and if the selected sub-channel receives the CSI, judging whether the selected sub-channel has effective CSI.
4. The method according to any of claims 1-3, wherein the determining whether the selected sub-channel has valid CSI comprises:
judging whether the acquisition time of the CSI received by the selected sub-channel is less than a preset time threshold value or not;
if so, then valid CSI is present.
5. The method of claim 1, further comprising:
creating a corresponding relation among CSI, CSI acquisition time and a sub-channel, and initializing the CSI and the CSI acquisition time to an invalid value;
and analyzing MAC information fed back by the target UE, updating the latest CSI by adopting the CSI in the MAC information, and updating the acquisition time of the latest CSI by adopting the time for receiving the MAC information.
6. The method of claim 2, wherein if the bit error rate of the target UE decoding, the ratio of the number of times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE, and the channel busy rate satisfy a preset condition, the sending of the CSI-RS is not triggered, comprising:
judging whether the error rate of the target UE decoding is smaller than a preset threshold value or not;
if so, judging whether the frequency proportion of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is smaller than a preset proportion;
if so, whether the channel busy rate is smaller than a preset busy rate threshold value or not;
if so, not triggering the CSI-RS to be transmitted.
7. The method of claim 6, further comprising:
if the error rate of the target UE decoding is not greater than a preset threshold value, the CSI-RS is not triggered to be sent;
if the ratio of the times of sending data to the target UE and receiving the decoding feedback information fed back by the target UE is not greater than a preset ratio, the CSI-RS is not triggered to be sent;
and if the channel busy rate is greater than a preset busy rate threshold value, not triggering the sending of the CSI-RS.
8. An apparatus that triggers CSI-RS transmission, comprising:
the judging module is used for judging whether the selected sub-channel has effective Channel State Information (CSI) or not under the condition of sending data to target User Equipment (UE);
the first trigger module is used for not triggering the sending of a channel state information reference signal CSI-RS if the bit error rate of target UE decoding, the ratio of times of sending data to the target UE and receiving decoding feedback information fed back by the target UE and the channel busy rate meet preset conditions;
and if not, triggering the sending of the CSI-RS so as to enable the target UE to feed back the CSI.
9. A user device, comprising:
one or more processors;
a storage device for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-7.
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