CN111294102B - CSI-RS transmission method and device, storage medium, and transmitting UE - Google Patents
CSI-RS transmission method and device, storage medium, and transmitting UE Download PDFInfo
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- CN111294102B CN111294102B CN201910712616.4A CN201910712616A CN111294102B CN 111294102 B CN111294102 B CN 111294102B CN 201910712616 A CN201910712616 A CN 201910712616A CN 111294102 B CN111294102 B CN 111294102B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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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
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Abstract
A CSI-RS sending method and device, a storage medium and a sending UE are provided, the method comprises the following steps: determining the reserved resources left after the first side link data is sent; determining one or more second receiving UEs according to the remaining reserved resources; and sending configuration information to the one or more second receiving UEs, wherein the configuration information comprises the target IDs and CSI-RS information of the one or more second receiving UEs. The scheme of the invention has the opportunity of effectively ensuring the transmission quality when the remaining reserved resources are utilized to send the information of other receiving UE.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a CSI-RS transmission method and apparatus, a storage medium, and a transmitting UE.
Background
In the Vehicle to electrical (V2X) network, data transmission and reception are performed between a User Equipment (UE) and the UE through a Side-link (Side-link).
In LTE V2X, the number of subframes for psch transmission opportunities is configured by a higher layer C _ rest =10 × sl _resource _reset _counter. Each time a transmission resource is used, C _ resel is decreased by 1, and when C _ resel is decreased to 1, the UE performs resource sensing again.
In RAN1#97 chairman's Notes for forming a chairman conference, new Radio (NR) V2X Mode 2 supports reservation of resources for feedback-based sidelink shared channel retransmission, and supports release of unused resources using HARQ feedback at least from the perspective of the user equipment transmitting this Transport Block (TB).
From the above two cases, it can be determined that there may be a remaining reserved resource after UE1 has transmitted all data to UE 2. In order to more efficiently utilize the transmission resources, UE1 may transmit data for UE3 using the remaining resources of the reserved resources.
However, in the prior art, at this time, the transmitting UE (i.e., UE 1) does not determine the Channel Quality Indicator (CQI) and the Rank Indicator (RI) of the data transmitted to UE3, which easily results in poor transmission quality.
There is a need for a CSI-RS transmission method that enables a transmitting UE to determine channel quality, so that there is an opportunity to effectively ensure transmission quality when transmitting information of other receiving UEs using remaining reserved resources.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a CSI-RS sending method and device, a storage medium and a sending UE, which have a chance to effectively ensure the transmission quality when sending the information of other receiving UEs by using the remaining reserved resources.
In order to solve the above technical problem, an embodiment of the present invention provides a CSI-RS transmitting method, including the following steps: determining the reserved resources left after the first side link data is sent; determining one or more second receiving UEs according to the remaining reserved resources; and sending configuration information to the one or more second receiving UEs, wherein the configuration information comprises the target IDs and CSI-RS information of the one or more second receiving UEs.
Optionally, the CSI-RS sending method further includes: receiving CSI reports from the one or more second receiving UEs, respectively, the CSI reports being determined by each second receiving UE according to the CSI-RS information; and determining UE to be sent in the one or more second receiving UEs according to the CSI report, and sending second side chain data to the UE to be sent by adopting the remaining reserved resources.
Optionally, determining, according to the CSI report, a UE to be sent in the one or more second receiving UEs includes: and determining the earliest received CSI report, and taking the second receiving UE to which the earliest received CSI report belongs as the UE to be sent.
Optionally, determining, according to the CSI report, a UE to be sent in the one or more second receiving UEs includes: and determining a second receiving UE with the best channel quality from the one or more second receiving UEs as the UE to be sent according to the CSI report.
Optionally, the determining the reserved resources remaining after the first sidelink data is sent includes: determining the residual sending times of the first side chain data; and if the residual sending times are less than or equal to the preset times, determining the reserved resources left after the first side chain data are sent.
Optionally, the remaining number of times of sending the first side link data is determined when sending the first side link data to the first receiving UE.
Optionally, determining one or more second receiving UEs according to the remaining reserved resources includes: determining data to be sent of each receiving UE; and if the resource occupied by the data to be sent is less than or equal to the residual reserved resource, determining that the receiving UE to which the data to be sent belongs is the second receiving UE.
Optionally, determining one or more second receiving UEs according to the remaining reserved resources includes: determining data to be sent of each receiving UE; if the resource occupied by the data to be sent is less than or equal to the residual reserved resource, determining that the receiving UE to which the data to be sent belongs is an alternative UE; pre-determining a time to receive a CSI report from each of the candidate UEs; if the time for receiving the CSI report is earlier than a preset time point, determining that the alternative UE to which the CSI report belongs is the second receiving UE; and the preset time point is determined according to the time point of sending the first side chain data.
Optionally, before determining one or more second receiving UEs according to the remaining reserved resources, the CSI-RS transmitting method further includes: and determining that the residual reserved resources are greater than or equal to a preset resource threshold value.
Optionally, the sending the configuration information to the one or more second receiving UEs includes: and including the configuration information in secondary link control information, and sending the secondary link control information to the one or more second receiving UEs by using PSCCH.
Optionally, the sending the configuration information to the one or more second receiving UEs includes: transmitting the configuration information to the one or more second receiving UEs using MAC-CE signaling.
Optionally, the sending the configuration information to the one or more second receiving UEs includes: sending the configuration information to the one or more second receiving UEs using RRC signaling.
To solve the above technical problem, an embodiment of the present invention provides a CSI-RS transmitting apparatus, including: the residual resource determining module is suitable for determining the residual reserved resources after the first side link data is sent; a second receiving UE determining module, adapted to determine one or more second receiving UEs according to the remaining reserved resources; a configuration information sending module adapted to send configuration information to the one or more second receiving UEs, the configuration information including target IDs of the one or more second receiving UEs and CSI-RS information.
To solve the above technical problem, an embodiment of the present invention provides a storage medium having stored thereon computer instructions, which when executed, perform the steps of the CSI-RS transmitting method described above.
In order to solve the technical problem, an embodiment of the present invention provides a sending UE, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the CSI-RS sending method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the present invention, after the remaining reserved resources are determined, configuration information is sent to one or more second receiving UEs, where the configuration information includes target IDs and CSI-RS information of the one or more second receiving UEs, so that the receiving UEs can feed back channel quality information according to the CSI-RS information, for example, a CSI report feedback manner can be adopted, so that the sending UEs determine channel quality, and further, there is an opportunity to effectively ensure transmission quality when sending information of other receiving UEs by using the remaining reserved resources.
Further, the sending UE determines the UE to be sent in the one or more second receiving UEs according to the CSI report, and sends the second side chain data to the UE to be sent by using the remaining reserved resources.
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Fig. 1 is a flowchart of a CSI-RS transmission method according to an embodiment of the present invention;
FIG. 2 is a flowchart of one embodiment of step S12 of FIG. 1;
FIG. 3 is a flow chart of another embodiment of step S12 of FIG. 1;
fig. 4 is a partial flow diagram of another CSI-RS transmission method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a CSI-RS transmitting apparatus according to an embodiment of the present invention.
Detailed Description
As described above, in the existing V2X technology, when UE1 finishes transmitting all data to UE2, there may be a residual reserved resource. In order to more efficiently utilize the transmission resources, UE1 may transmit data of UE3 using the remaining resources of the reserved resources.
Specifically, whether the CSI reference signal transmitted together with the sidelink shared channel transmitted to a certain ue can be transmitted to one or more other ues has been a problem to be solved.
More specifically, in RAN1#96 conference forming chairman's Notes, the relevant Working assumption (Working assumption) for CSI reference signals states that in R16 there is no independent reference signal transmission for CSI reporting (CSI report) and the NR secondary link edge uses the NR Uu port CSI framework.
In RAN1#96b secondary conference forming chairman's Notes, at least CSI reference signals are supported as Channel Quality Indication (CQI)/Rank Indication (RI) measurements, and the CSI reference signals are restricted to be transmitted within the secondary link shared channel range.
Meanwhile, when the user equipment activates one CSI report, the user equipment may have various behaviors, for example: finding a report Config associated with the ResourceConfig, measuring RSs configured according to the ResourceConfig, and reporting a report result configured according to the report Config.
For the aperiodic report activated by CSI request (0-6 bit) in the Downlink Control Information (DCI), each field corresponds to 1 trigger state. Therefore, at most 2^6-1=63 trigger states are associated in the downlink control information.
However, in the prior art, the sending UE (i.e. UE 1) does not determine the channel quality indication and the rank indication of the data sent to UE3 at this time, which easily results in poor transmission quality.
The inventor of the present invention has found through research that, in the prior art, channel quality indication and rank indication need to be determined based on CSI-RS information, however, a sending UE cannot timely send CSI-RS information, which makes it difficult for the sending UE to determine channel quality.
In the embodiment of the present invention, after determining the remaining reserved resources, configuration information is sent to one or more second receiving UEs, where the configuration information includes the target ID and CSI-RS information of the one or more second receiving UEs, so that the receiving UEs can feed back channel quality information according to the CSI-RS information, for example, a CSI report feedback manner can be adopted, so that the sending UEs determine channel quality, and further, there is an opportunity to effectively ensure transmission quality when sending information of other receiving UEs using the remaining reserved resources.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart of a CSI-RS transmitting method according to an embodiment of the present invention. The CSI-RS transmission method may include steps S11 to S13:
step S11: determining the reserved resources left after the first side link data is sent;
step S12: determining one or more second receiving UEs according to the remaining reserved resources;
step S13: and sending configuration information to the one or more second receiving UEs, wherein the configuration information comprises the target IDs and CSI-RS information of the one or more second receiving UEs.
In the specific implementation of step S11, by determining the reserved resources remaining after the first sidelink data is transmitted, there is an opportunity to utilize the remaining reserved resources.
Further, the step of determining the reserved resources remaining after the first sidelink data is sent may include: determining the remaining sending times of the first side chain data; and if the residual sending times are less than or equal to the preset times, determining the reserved resources left after the first side chain data are sent.
In the embodiment of the invention, the remaining sending times are determined firstly, and then the remaining reserved resources are confirmed when the remaining sending times are less and the data can be sent out, so that the frequency of confirming the remaining reserved resources is reduced, and the confirmation resources are saved.
Further, the remaining number of transmissions of the first side-chain data may be determined when transmitting the first side-chain data to the first receiving UE.
In a specific implementation manner of the embodiment of the present invention, it may be configured to determine the remaining number of times of sending the first side link data each time the first side link data is sent to the first receiving UE, so that the remaining number of times of sending may be determined in real time, which is further helpful for determining the remaining reserved resources in time.
In another specific implementation manner of the embodiment of the present invention, the remaining number of times of sending the first side chain data may be determined only when the first side chain data is sent to the first receiving UE for a preset number of times, for example, when the number of times of sending is determined, and the remaining number of times of sending is estimated to be less, the remaining number of times of sending is determined, so that the frequency of determining the remaining number of times of sending may be reduced, and the determination resource is further saved.
As a non-limiting example, the preset number may be set to 2-10 times, so as to avoid the waste of the acknowledgement resource caused by too many times and avoid the insufficient remaining duration caused by too few times, which may make it too late to send and receive information to and from the second receiving UE, so that the remaining reserved resource may not be effectively utilized.
In the implementation of step S12, one or more second receiving UEs may be determined in various manners according to the remaining reserved resources.
Referring to fig. 2, fig. 2 is a flowchart of an embodiment of step S12 in fig. 1. The step of determining one or more second receiving UEs according to the remaining reserved resources may include steps S21 to S22:
step S21: data to be transmitted for each receiving UE is determined.
Step S22: and if the resource occupied by the data to be sent is less than or equal to the residual reserved resource, determining that the receiving UE to which the data to be sent belongs is the second receiving UE.
In the embodiment of the invention, the receiving UE can be selected as the target to be sent only under the condition that the resource occupied by the data to be sent is adaptive to the remaining reserved resource, so that the remaining reserved resource can be utilized more effectively.
Referring to fig. 3, fig. 3 is a flowchart of another embodiment of step S12 in fig. 1. The step of determining one or more second receiving UEs according to the remaining reserved resources may include steps S31 to S32, and the following steps are described.
In step S31, data to be transmitted for each receiving UE is determined.
In step S32, if the resource occupied by the data to be sent is less than or equal to the remaining reserved resource, it is determined that the receiving UE to which the data to be sent belongs is an alternative UE.
In the specific implementation, more details about steps S31 to S32 are described with reference to steps S21 and S22 in fig. 2, and are not described herein again.
In step S33, the time to receive CSI reports from each candidate UE is pre-determined.
In a specific implementation, the sending UE may predict the time when the receiving UE needs to send back the CSI report, and give an indication when sending the CSI-RS information, so that the time when receiving the CSI report from each candidate UE may be determined more accurately.
In step S34, if the time for receiving the CSI report is earlier than a preset time point, it is determined that the candidate UE to which the CSI report belongs is the second receiving UE.
And the preset time point is determined according to the time point of sending the first side chain data.
In a specific implementation, it may be predetermined how long it takes to transmit data to the CSI report after receiving the CSI report, and the time length is advanced as the preset time point according to a time point when the first sidelink data is transmitted.
In the embodiment of the invention, the receiving UE can be selected as the target to be sent only under the condition that the occupied resources of the data to be sent are adapted to the remaining reserved resources and the CSI report is received at a chance, so that the remaining reserved resources are utilized more effectively and the accuracy of data transmission is improved.
Further, before determining one or more second receiving UEs according to the remaining reserved resources, the CSI-RS transmitting method may further include: and determining that the residual reserved resources are greater than or equal to a preset resource threshold value.
In the embodiment of the invention, the receiving UE can be selected under the condition that the residual reserved resource is large enough to have an opportunity to realize data transmission, so that the resource waste caused by the fact that the proper receiving UE cannot be selected at a high probability when the residual reserved resource is very small is avoided.
With continued reference to fig. 1, in a specific implementation of step S13, configuration information is sent to the one or more second receiving UEs, where the configuration information includes target IDs and CSI-RS information of the one or more second receiving UEs.
The target Identity (ID) may be used to indicate the second receiving UE, and it should be noted that in the embodiment of the present invention, other appropriate identity information may also be used to indicate the second receiving UE.
In particular implementations, the configuration information may be sent to the one or more second receiving UEs in a variety of ways.
In a first specific implementation manner of the embodiment of the present invention, the step of sending the configuration information to the one or more second receiving UEs may include: and including the configuration information in secondary link control information, and sending the secondary link control information to the one or more second receiving UEs by using PSCCH.
Specifically, in the RAN1#94b secondary conference forming chairman's Notes, the Layer-1 destination ID may be explicitly included in the secondary link Control Information (Sidelink Control Information, SCI), which is used to indicate to which UE the secondary link shared channel is transmitted, so that it or their destination IDs may be additionally indicated in the secondary link Control Information in order to indicate to which or which additional UEs the CSI reference signal is transmitted.
In a second specific implementation manner of the embodiment of the present invention, the step of sending the configuration information to the one or more second receiving UEs may include: and sending the configuration information to the one or more second receiving UEs by adopting a Media Access Control Element (MAC-CE) signaling.
Specifically, an Aperiodic CSI Trigger State selection (Aperiodic CSI Trigger State selection) MAC-CE structure in NR Uu may include fields of Serving Cell ID, BWP ID, ti, and the like.
The Serving Cell ID is used to indicate a Serving Cell to which the MAC-CE is applied, and the field length is 5 bits. The BWP ID is a bandwidth part (BWP) indicating the MAC-CE application, and has a field of 2 bits. Ti is used to indicate the selection state of the configured aperiodic trigger state in the CSI-aperiodicTriggerStateList (at most 2^6-1=63 trigger states). Because there are only 1 BWP in NR V2X, the BWP ID field can be changed to destination ID, and the number of Ti fields can be reduced to achieve the purpose of better indicating the target ID.
In a third specific implementation manner of the embodiment of the present invention, the step of sending the configuration information to the one or more second receiving UEs may include: and sending the configuration information to the one or more second receiving UEs by adopting Radio Resource Control (RRC) signaling.
It should be noted that, in the embodiment of the present invention, other suitable higher layer signaling may also be adopted to send the configuration information to the receiving UE.
In the embodiment of the present invention, after determining the remaining reserved resources, configuration information is sent to one or more second receiving UEs, where the configuration information includes the target ID and CSI-RS information of the one or more second receiving UEs, so that the receiving UEs can feed back channel quality information according to the CSI-RS information, for example, a CSI report feedback manner can be adopted, so that the sending UEs determine channel quality, and further, there is an opportunity to effectively ensure transmission quality when sending information of other receiving UEs using the remaining reserved resources.
Referring to fig. 4, fig. 4 is a partial flowchart of another CSI-RS transmission method according to an embodiment of the present invention. The another CSI-RS transmission method may include steps S11 to S13 shown in fig. 1, and may further include steps S41 to S42:
step S41: receiving CSI reports from the one or more second receiving UEs, respectively, the CSI reports being determined by each second receiving UE according to the CSI-RS information;
step S42: and determining UE to be sent in the one or more second receiving UEs according to the CSI report, and sending second side chain data to the UE to be sent by adopting the remaining reserved resources.
In a specific implementation, the step of determining, according to the CSI report, a UE to be sent in the one or more second receiving UEs may include: and determining the earliest received CSI report, and taking the second receiving UE to which the earliest received CSI report belongs as the UE to be sent.
In the embodiment of the present invention, the second receiving UE to which the earliest received CSI report belongs is used as the UE to be sent, so that the risk that the time is insufficient and the remaining reserved resources are not utilized can be effectively reduced.
In a specific implementation, the step of determining, according to the CSI report, a UE to be sent in the one or more second receiving UEs may include: and determining a second receiving UE with the best channel quality from the one or more second receiving UEs as the UE to be sent according to the CSI report.
In the embodiment of the present invention, the second receiving UE with the best channel quality is determined from the one or more second receiving UEs as the UE to be transmitted, so that the accuracy of data transmission can be effectively improved, and the utilization value of the remaining reserved resources can be improved.
In the embodiment of the present invention, the sending UE determines, according to the CSI report, the UE to be sent among the one or more second receiving UEs, and sends the second side link data to the UE to be sent by using the remaining reserved resources.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a CSI-RS transmitting apparatus according to an embodiment of the present invention. The CSI-RS transmitting apparatus may include:
a remaining resource determining module 51, adapted to determine a remaining reserved resource after the first side link data is sent;
a second receiving UE determining module 52 adapted to determine one or more second receiving UEs according to the remaining reserved resources;
a configuration information sending module 53, adapted to send configuration information to the one or more second receiving UEs, where the configuration information includes target IDs and CSI-RS information of the one or more second receiving UEs.
In the embodiment of the present invention, after determining the remaining reserved resources, configuration information is sent to one or more second receiving UEs, where the configuration information includes the target ID and CSI-RS information of the one or more second receiving UEs, so that the receiving UEs can feed back channel quality information according to the CSI-RS information, for example, a CSI report feedback manner can be adopted, so that the sending UEs determine channel quality, and further, there is an opportunity to effectively ensure transmission quality when sending information of other receiving UEs using the remaining reserved resources.
In the implementation, please refer to the foregoing description and the related descriptions about the CSI-RS transmitting method shown in fig. 1 to fig. 4 for the principle, the specific implementation and the beneficial effects of the CSI-RS transmitting apparatus, which are not described herein again.
It should be noted that in the specific implementation of the embodiment of the present invention, the configuration of the target ID may be added to the CSI-Associated report ConfigInfo in the higher layer signaling.
In one specific application, a resourceForChannel like field in the CSI-Associated report ConfigInfo may be retained. Specifically, the original NR Uu high-level configuration may allocate a maximum of 128 trigger states to multiple user equipments for use, such as trigger states belonging to user equipment 2 from 1 to 16, trigger states belonging to user equipment 3 from 17 to 32, and so on. The MAC-CE is activated by 63 MAC-CEs, so that each UE knows which UE the corresponding CSI reference signal is intended for when each UE solves the unique trigger states corresponding to the CSI request in the sidelink control information (e.g. the CSI request field is 000001, which indicates that the CSI reference signal is intended for UE 2).
In another specific application, the resourceforchannellnfo field in the CSI-AssociatedReportConfigInfo may be removed. Specifically, since the CSI reference signal is limited to be transmitted within the scope of the sidelink shared channel in NR V2X, the CSI reference signal cannot be configured with a bandwidth larger than that of the sidelink shared channel, which makes the CSI reference signal configuration very limited. Therefore, the configuration of the CSI reference signals can be independently configured in the sidelink control information into a table form, the form is similar to that of a DMRS or a PTRS, only destination IDs are associated with high-level CSI reports, the method can only see the self report and the self destination ID from the perspective of receiving user equipment, and can see the relationship between the configured report and all the destination IDs from the perspective of user equipment sending the CSI reference signals, so that a plurality of trigger user equipment can send respective CSI reports.
It should be noted that in NR Uu, there is a fixed report SlotOffset for each aperiodic CSI report, so the base station can receive CSI reports at certain slots. In NR Uu, mode1 needs to allocate resources for the transmitting user equipment, and Mode 2 needs to sense resources for the transmitting user equipment itself, so to avoid that multiple user equipments need to transmit CSI reports in the same slot, the fixed report SlotOffset can be changed to 1 threshold, as long as CSI reports are transmitted before this threshold. The user equipment transmitting the CSI reference signal needs to be aware all the time within the threshold range to receive the CSI report. When data packets of a plurality of user equipment arrive, the method can ensure that a transmission mechanism is established with the user equipment with better channel quality within the allowable delay range.
In this case, slotOffset of the original higher layer related report needs to be changed to threshold so that the multiple user equipments have sufficient resources to feed back CSI reports.
It should be noted that the technical solution of the present invention is applicable to a 5G (5 Generation) communication system, a 4G communication system, a 3G communication system, and various future new communication systems, such as 6G, 7G, and the like.
The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the computer instructions execute the steps of the method when running. The storage medium may be a computer-readable storage medium, and may include, for example, non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may also include optical disks, mechanical hard disks, solid state hard disks, and so on.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory may be Random Access Memory (RAM) which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlronous DRAM (SLDRAM), and direct bus RAM (DR RAM).
The embodiment of the present invention further provides a sending UE, which includes a memory and a processor, where the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the method when executing the computer instructions. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Specifically, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal device), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (15)
1. A CSI-RS transmission method is characterized by comprising the following steps:
determining the reserved resources left after the first side link data is sent;
determining one or more second receiving UEs according to the remaining reserved resources;
and sending configuration information to the one or more second receiving UEs, wherein the configuration information comprises the target IDs and CSI-RS information of the one or more second receiving UEs.
2. The CSI-RS transmitting method according to claim 1, further comprising:
receiving CSI reports from the one or more second receiving UEs, respectively, the CSI reports being determined by each second receiving UE according to the CSI-RS information;
and determining UE to be sent in the one or more second receiving UEs according to the CSI report, and sending second side chain data to the UE to be sent by adopting the remaining reserved resources.
3. The CSI-RS transmission method of claim 2, wherein determining a UE to be transmitted among the one or more second receiving UEs based on the CSI report comprises:
and determining the earliest received CSI report, and taking the second receiving UE to which the earliest received CSI report belongs as the UE to be sent.
4. The CSI-RS transmission method of claim 2, wherein determining, among the one or more second receiving UEs, a UE to be transmitted according to the CSI report comprises:
and determining a second receiving UE with the best channel quality from the one or more second receiving UEs as the UE to be sent according to the CSI report.
5. The CSI-RS transmission method of claim 1, wherein the determining the reserved resources left after the first sidelink data is transmitted comprises:
determining the remaining sending times of the first side chain data;
and if the residual sending times are less than or equal to the preset times, determining the residual reserved resources after the first side link data are sent.
6. The CSI-RS transmission method of claim 5,
the remaining number of transmissions of the first sidelink data is determined when the first sidelink data is transmitted to a first receiving UE.
7. The CSI-RS transmission method of claim 1, wherein determining one or more second receiving UEs based on the remaining reserved resources comprises:
determining data to be sent of each receiving UE;
and if the resource occupied by the data to be sent is less than or equal to the residual reserved resource, determining that the receiving UE to which the data to be sent belongs is the second receiving UE.
8. The CSI-RS transmission method of claim 1, wherein determining one or more second receiving UEs based on the remaining reserved resources comprises:
determining data to be sent of each receiving UE;
if the resource occupied by the data to be sent is less than or equal to the residual reserved resource, determining that the receiving UE to which the data to be sent belongs is an alternative UE;
pre-determining a time to receive a CSI report from each of the candidate UEs;
if the time for receiving the CSI report is earlier than a preset time point, determining that the alternative UE to which the CSI report belongs is the second receiving UE;
and the preset time point is determined according to the time point of sending the first side chain data.
9. The CSI-RS transmission method of claim 1, wherein before determining one or more second receiving UEs based on the remaining reserved resources, further comprising:
and determining that the residual reserved resources are greater than or equal to a preset resource threshold value.
10. The CSI-RS transmission method of claim 1, wherein transmitting configuration information to the one or more second receiving UEs comprises:
and including the configuration information in secondary link control information, and sending the secondary link control information to the one or more second receiving UEs by using PSCCH.
11. The CSI-RS transmission method of claim 1, wherein transmitting configuration information to the one or more second receiving UEs comprises:
transmitting the configuration information to the one or more second receiving UEs using MAC-CE signaling.
12. The CSI-RS transmission method of claim 1, wherein transmitting configuration information to the one or more second receiving UEs comprises:
and sending the configuration information to the one or more second receiving UEs by adopting RRC signaling.
13. A CSI-RS transmitting apparatus, comprising:
the residual resource determining module is suitable for determining the residual reserved resources after the first side link data is sent;
a second receiving UE determining module, adapted to determine one or more second receiving UEs according to the remaining reserved resources;
a configuration information sending module adapted to send configuration information to the one or more second receiving UEs, the configuration information including target IDs of the one or more second receiving UEs and CSI-RS information.
14. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the CSI-RS transmitting method of any of claims 1 to 11.
15. A transmitting UE comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the CSI-RS transmitting method of any of claims 1 to 11.
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