CN114866212A - DMRS configuration method and device, and base station - Google Patents
DMRS configuration method and device, and base station Download PDFInfo
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Abstract
The disclosure provides a DMRS configuration method and device and a base station. The DMRS configuration method comprises the following steps: under the condition that a user terminal is randomly accessed into a cell, identifying a target area where the user terminal is located; scanning the target area by using a preset beam to determine the motion states of all moving objects in the target area; if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not less than a first proportion threshold, configuring an additional DMRS for the user terminal through an RRC reconfiguration message; and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is smaller than the first proportion threshold.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to a method and an apparatus for configuring a DMRS (Demodulation Reference Signal), and a base station.
Background
In a 5G network, in order to enable a terminal to demodulate a channel more quickly, a 3GPP (3rd Generation Partnership Project) places DMRSs at a front position of a slot when designing the DMRSs, and also designs an additional DMRS at a rear position of the slot in order to cope with a doppler effect to satisfy an estimation accuracy of channel time-varying property. In practical application, the base station performs DMRS configuration through an RRC (Radio Resource Control) reconfiguration message.
Disclosure of Invention
The inventor notices that, because the base station does not have the capability to identify whether the user terminal moving at a high speed exists in the cell at present, the base station configures additional DMRSs for all the user terminals in the cell, and the base station cannot effectively change DMRS parameters after configuring the DMRSs, so that when the user terminal moving at a high speed does not exist in the cell, configuring additional DMRSs for all the user terminals causes waste of network resources, and reduces the spectrum efficiency of the network.
Accordingly, the DMRS configuration method provided by the present disclosure can perform DMRS differential configuration for a user terminal according to a mobility attribute of the user terminal, thereby effectively improving the spectrum efficiency of a network.
According to a first aspect of the embodiments of the present disclosure, there is provided a DMRS configuration method, performed by a DMRS configuration apparatus, including: under the condition that a user terminal is randomly accessed into a cell, identifying a target area where the user terminal is located; scanning the target area by using a preset beam to determine the motion state of all moving objects in the target area; if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not less than a first proportion threshold, configuring an additional DMRS for the user terminal through a Radio Resource Control (RRC) reconfiguration message; and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is less than the first proportion threshold.
In some embodiments, the identifying the target segment in which the ue is located includes: acquiring two SSB wave beams of the user terminal with strongest time advance TA and reference signal received power RSRP; determining the distance L between the user terminal and a base station in the cell according to the TA; determining a corresponding sector according to the two SSB wave beams; and determining a target area where the user terminal is located according to the distance L and the sector.
In some embodiments, the determining the target segment where the ue is located according to the distance and the sector includes: dividing the sector into a first area and a second area which are equal in width in the direction away from the base station, wherein the second area is positioned on one side of the first area away from the base station; dividing the first area into a plurality of sub-slice areas with equal width in a direction away from the base station; if the user terminal is located in the first area, determining a sub-area where the user terminal is located according to the distance L, and taking the sub-area where the user terminal is located as the target area; and if the user terminal is located in the second area, selecting the target area in the second area by using a first interval threshold L + m and a second interval threshold L-m in the direction far away from the base station, wherein m is a preset parameter.
In some embodiments, after the target parcel is selected, whether the user terminal is located in the target parcel is detected within a predetermined time range according to positioning information reported by the user terminal; and if the proportion of the detection results of the user terminal in the target area to all the detection results is smaller than a preset value, increasing m by a preset step length until the proportion of the detection results of the user terminal in the target area to all the detection results is not smaller than the preset value.
In some embodiments, if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is smaller than a first proportion threshold and greater than a second proportion threshold, detecting whether the proportion of the motor vehicle driving road area in the target area in the total area of the target area is greater than a preset area threshold; and if the proportion of the motor vehicle driving road area in the target area to the total area of the target area is greater than a preset area threshold, configuring an additional DMRS for the user terminal through an RRC reconfiguration message.
In some embodiments, if the proportion of the motor vehicle driving road area in the target region to the total area of the target region is not greater than a preset area threshold, no additional DMRS is configured for the user terminal.
According to a second aspect of the embodiments of the present disclosure, there is provided a DMRS configuration apparatus, including: the system comprises a first processing module, a second processing module and a third processing module, wherein the first processing module is configured to identify a target area where a user terminal is located under the condition that the user terminal randomly accesses a cell; a second processing module configured to scan the target patch with a predetermined beam to determine motion states of all moving objects in the target patch; a third processing module configured to configure an additional DMRS for the user terminal through an RRC reconfiguration message if, in all the moving objects, a ratio of a total number of objects having a moving speed greater than a preset speed threshold to all the moving objects is not less than a first ratio threshold; and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is less than the first proportion threshold.
In some embodiments, the first processing module is configured to acquire two SSB beams of a synchronization signal block with strongest timing advance TA and strongest reference signal received power RSRP of the user terminal, determine a distance L between the user terminal and a base station in the cell according to the TA, determine a corresponding sector according to the two SSB beams, and determine a target segment where the user terminal is located according to the distance L and the sector.
In some embodiments, the first processing module is configured to divide the sector into a first area and a second area with equal widths in a direction away from the base station, where the second area is located on a side of the first area away from the base station, divide the first area into a plurality of sub-slice areas with equal widths in the direction away from the base station, determine, if the user terminal is located in the first area, a sub-slice area where the user terminal is located according to the distance L, and use the sub-slice area where the user terminal is located as the target slice area, and select, if the user terminal is located in the second area, the target slice area in the second area by using a first interval threshold L + m and a second interval threshold L-m in the direction away from the base station, where m is a preset parameter.
In some embodiments, the first processing module is configured to detect whether the ue is located in the target segment within a predetermined time range according to the positioning information reported by the ue after the target segment is selected, and increase m by a predetermined step length if a ratio of detection results of the ue located in the target segment to all detection results is smaller than a predetermined value, until a ratio of detection results of the ue located in the target segment to all detection results is not smaller than the predetermined value.
In some embodiments, the third processing module is configured to detect whether a ratio of a total number of objects having a moving speed greater than a preset speed threshold to the total area of the target zone is greater than a preset area threshold if the ratio of the total number of objects having a moving speed greater than the preset speed threshold to the total number of the moving objects is less than a first ratio threshold and greater than a second ratio threshold, and configure, by means of an RRC reconfiguration message, an additional DMRS for the user terminal if the ratio of a motor vehicle driving road area in the target zone to the total area of the target zone is greater than the preset area threshold.
In some embodiments, the third processing module is configured to not configure the additional DMRS for the user terminal if a ratio of a motor vehicle driving road area in the target region to a total area of the target region is not greater than a preset area threshold.
According to a third aspect of the embodiments of the present disclosure, there is provided a DMRS configuration apparatus, including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to perform a method implementing any of the embodiments described above based on instructions stored by the memory.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a base station including the DMRS configuration apparatus as described in any one of the embodiments above.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement the method according to any one of the embodiments.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a flowchart illustrating a DMRS configuration method according to an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating a method for identifying a target segment where a user terminal is located according to an embodiment of the disclosure;
fig. 3 is a schematic view of an SSB beam according to an embodiment of the present disclosure;
fig. 4 is a flowchart illustrating a DMRS configuration method according to another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a DMRS configuration apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a DMRS configuration apparatus according to another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The inventor has noticed that in the existing DL-AoD (Downlink Angle-of-deviation Angle) positioning method, a user terminal initiates random access to access a cell, a cell base station issues the length and number of DMRSs to the terminal through an RRC reconfiguration message, and the configuration is semi-static in DMRS-Downlink Config parameters of a PDSCH-Config field and DMRS-uplink Config parameters of a PUSCH-Config field, and the base station and the user terminal in the cell perform scheduling and demodulation according to the configuration.
Considering that there may be a terminal moving at a high speed in a cell, a base station generally configures an additional DMRS, and after the configuration, the base station can only modify the DMRS manually, and in addition, configuring the additional DMRS increases about 7% of network resource overhead, thereby reducing the spectral efficiency of the cell.
Accordingly, the DMRS configuration method provided by the present disclosure can perform DMRS differential configuration for a user terminal according to a mobility attribute of the user terminal, thereby effectively improving the spectrum efficiency of a network.
Fig. 1 is a flowchart illustrating a DMRS configuration method according to an embodiment of the present disclosure. In some embodiments, the following DMRS configuration methods are performed by a DMRS configuration apparatus.
In step 101, in the case that the user terminal randomly accesses to the cell, a target cell where the user terminal is located is identified.
In some embodiments, the flow of the method for identifying the target zone where the user terminal is located is shown in fig. 2.
In step 201, two SSB (Synchronization Signal Block) beams with strongest TA (Timing Advance) and RSRP (Reference Signal Receiving Power) of the ue are obtained.
In step 202, the distance L of the user terminal from the base station in the cell is determined according to the TA.
For example, the distance L between the ue and the base station in the cell is calculated by TA × C, where C is the speed of light.
In step 203, the corresponding sector is determined from the two SSB beams.
For example, as shown in fig. 3, the two SSB beams with the strongest PSRP are SSB beam 5 and SSB beam 6, and the corresponding sector is a triangular area between SSB beam 5 and SSB beam 6 set by a dotted line. In this sector, the user terminal is at a distance L from the base station in the cell.
In step 204, the target area where the user terminal is located is determined according to the distance L and the sector.
In some embodiments, the sector is divided into a first area and a second area with equal width in the direction away from the base station, wherein the second area is located on the side of the first area away from the base station. Next, the first area is divided into a plurality of equal-width sub-tile regions in a direction away from the base station.
As shown in fig. 3, in the direction away from the base station, the sector located between the SSB beam 5 and the SSB beam 6 is divided into a first area and a second area of equal width by D/2, where D is the cell coverage radius. Next, in the direction away from the base station, the first area is divided into k equal-width sub-patch areas, and the distances from the boundary of each sub-patch area to the base station are respectively D/2k, D/k, … and D/2.
And then, if the user terminal is located in the first area, determining the sub-slice area where the user terminal is located according to the distance L, and taking the sub-slice area where the user terminal is located as a target slice area.
And if the user terminal is located in the second area, selecting a target area in the second area by using a first interval threshold L + m and a second interval threshold L-m in the direction away from the base station, wherein m is a preset parameter.
For example, m is 5 meters.
As shown in fig. 3, if the ue is located in the second area, the boundary of the target segment where the ue is located is [ L-m, L + m ] in the direction away from the base station.
In some embodiments, after the target zone in which the ue is located in the second zone is selected, whether the ue is located in the target zone is detected within a predetermined time range according to the positioning information reported by the ue.
And if the proportion of the detection result of the user terminal in the target area to all the detection results is smaller than the preset value, increasing m by a preset step length until the proportion of the detection result of the user terminal in the target area to all the detection results is not smaller than the preset value.
For example, if the ratio of the detection result of the ue located in the target segment to the total detection result is less than 90% within the predetermined time range, then m is increased by a predetermined step (e.g. 1 m). And circulating the steps until the proportion of the detection result of the user terminal in the target area to the whole detection result reaches 90% within the preset time range. Thereby it is ensured that the user terminal is indeed located within the determined target parcel.
Returning to fig. 1. In step 102, the target patch is scanned with a predetermined beam to determine the motion status of all moving objects in the target patch.
In step 103, if the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold in all the moving objects, configuring the additional DMRS for the user terminal through the RRC reconfiguration message.
For example, the preset speed threshold is 30 km/h.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold, which means that the area is most likely to be on the driving road (i.e. road) of the motor vehicle, and the user terminal is likely to be located in the driving vehicle. In this case, the additional DMRS is configured for the user terminal through the RRC reconfiguration message.
In step 104, if the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects in all the moving objects is not greater than a second ratio threshold, no DMRS is configured for the user terminal, where the second ratio threshold is smaller than the first ratio threshold.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not greater than the second ratio threshold, which means that the area is probably located in the pedestrian area, and the terminal may be on the hands of the walking people. In this case, the user terminal is not configured with an additional DMRS.
In the DMRS configuration method provided in the foregoing embodiment of the present disclosure, whether to configure an additional DMRS for the user terminal is determined according to the motion states of all moving objects in the target region where the user terminal is located, so that dynamic DMRS configuration can be performed for the user terminal, and thus the spectrum efficiency of a network is effectively improved.
Fig. 4 is a flowchart illustrating a DMRS configuration method according to another embodiment of the present disclosure. In some embodiments, the following DMRS configuration methods are performed by a DMRS configuration apparatus.
In step 401, in the case that the ue randomly accesses to the cell, a target cell where the ue is located is identified.
In some embodiments, the flow of the method for identifying the target zone where the user terminal is located is shown in fig. 2.
In step 402, the target patch is scanned with a predetermined beam to determine the motion state of all moving objects in the target patch.
In step 403, if the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold Th1, configuring the additional DMRS for the user terminal through the RRC reconfiguration message.
For example, the preset speed threshold is 30 km/h.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold, which means that the area is most likely to be on the driving road (i.e. road) of the motor vehicle, and the user terminal is likely to be located in the driving vehicle. In this case, the additional DMRS is configured for the user terminal through the RRC reconfiguration message.
In step 404, if the ratio of the total number of objects with moving speeds greater than the preset speed threshold to all moving objects in all moving objects is not greater than the second ratio threshold Th2, no additional DMRS is configured for the user terminal, wherein the second ratio threshold Th2 is smaller than the first ratio threshold Th 1.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not greater than the second ratio threshold, which means that the area is probably located in the pedestrian area, and the terminal may be on the hands of the walking people. In this case, the user terminal is not configured with an additional DMRS.
In step 405, if the ratio of the total number of the moving objects with the moving speed greater than the preset speed threshold to the total moving objects is smaller than the first ratio threshold Th1 and greater than the second ratio threshold Th2, the ratio of the motor vehicle driving road area in the target zone to the total area of the target zone is detected.
In step 406, if the ratio of the motor vehicle driving road area in the target area to the total area of the target area is greater than the preset area threshold, configuring the additional DMRS for the user terminal through the RRC reconfiguration message.
In step 407, if the ratio of the motor vehicle driving road area in the target area to the total area of the target area is not greater than the preset area threshold, no additional DMRS is configured for the user terminal.
For example, the predetermined area threshold is 50%.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is smaller than the first ratio threshold Th1 and greater than the second ratio threshold Th2, which means that the area is probably in the intersection processing of the road and pedestrian areas. In this case, the user terminal may be in a traveling vehicle or may be in the hands of a walking person.
If the area occupied by the road in the area is large, the probability that the user terminal is located in a running vehicle is large, and in this case, the additional DMRS is configured for the user terminal through the RRC reconfiguration message. If the area occupied by the road in the area is small, the probability that the user terminal is located on the hand of a walking crowd is large, and the user terminal is not configured with the additional DMRS under the condition.
Fig. 5 is a schematic structural diagram of a DMRS configuration apparatus according to an embodiment of the present disclosure. As shown in fig. 5, the DMRS configuration apparatus includes a first processing module 51, a second processing module 52, and a third processing module 53.
The first processing module 51 is configured to identify a target segment where the user terminal is located in case the user terminal randomly accesses the cell.
In some embodiments, the first processing module 51 is configured to acquire two SSB beams of the ue with strongest TA and strongest RSRP, determine a distance L between the ue and a base station in a cell according to the TA, determine a corresponding sector according to the two SSB beams, and determine a target segment where the ue is located according to the distance L and the sector.
In some embodiments, the first processing module 51 is configured to divide the sector into a first area and a second area with equal width in a direction away from the base station, where the second area is located on a side of the first area away from the base station, divide the first area into a plurality of sub-slice areas with equal width in the direction away from the base station, determine, if the user terminal is located in the first area, a sub-slice area where the user terminal is located according to the distance L, and use the sub-slice area where the user terminal is located as a target slice area, and select, if the user terminal is located in the second area, the target slice area in the second area by using a first interval threshold L + m and a second interval threshold L-m, where m is a preset parameter.
In some embodiments, the first processing module 51 is configured to detect whether the ue is located in the target segment within a predetermined time range according to the positioning information reported by the ue after the target segment is selected, and increase m by a predetermined step length if the ratio of the detection result of the ue located in the target segment to all the detection results is smaller than a predetermined value, until the ratio of the detection result of the ue located in the target segment to all the detection results is not smaller than the predetermined value.
The second processing module 52 is configured to scan the target patch with predetermined beams to determine the motion status of all moving objects in the target patch.
The third processing module 53 is configured to configure an additional DMRS for the ue through the RRC reconfiguration message if, in all the moving objects, the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold; and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is smaller than the first proportion threshold.
For example, the preset speed threshold is 30 km/h.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not less than the first ratio threshold, which means that the area is most likely to be on the driving road (i.e. road) of the motor vehicle, and the user terminal is likely to be located in the driving vehicle. In this case, the additional DMRS is configured for the user terminal through the RRC reconfiguration message.
In addition, the proportion of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is not greater than the second proportion threshold, which means that the area is probably in a pedestrian area, and the terminal is probably on the hands of people walking. In this case, the user terminal is not configured with an additional DMRS.
In some embodiments, the third processing module 53 is configured to detect whether a ratio of a vehicle driving road area in the target segment to a total area of the target segment is greater than a preset area threshold if a ratio of a total number of objects having a moving speed greater than a preset speed threshold to all moving objects in all moving objects is less than a first ratio threshold and greater than a second ratio threshold, and configure the additional DMRS for the user terminal through the RRC reconfiguration message if the ratio of the vehicle driving road area in the target segment to the total area of the target segment is greater than the preset area threshold.
In addition, the third processing module 53 is configured to not configure the additional DMRS for the user terminal if the ratio of the motor vehicle driving road area in the target region to the total area of the target region is not greater than the preset area threshold.
It should be noted that the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects is smaller than the first ratio threshold Th1 and greater than the second ratio threshold Th2, which means that the area is probably in the intersection processing of the road and the pedestrian area. In this case, the user terminal may be in a traveling vehicle or may be in the hands of a walking person.
If the area occupied by the road in the area is large, the probability that the user terminal is located in a running vehicle is large, and in this case, the additional DMRS is configured for the user terminal through the RRC reconfiguration message. If the area occupied by the road in the area is small, the probability that the user terminal is located on the hand of a walking crowd is large, and the user terminal is not configured with the additional DMRS under the condition.
Fig. 6 is a schematic structural diagram of a DMRS configuration apparatus according to another embodiment of the present disclosure. As shown in fig. 6, the DMRS configuration apparatus includes a memory 61 and a processor 62.
The memory 61 is used for storing instructions, the processor 62 is coupled to the memory 61, and the processor 62 is configured to execute the method according to any one of the embodiments in fig. 1, 2 and 4 based on the instructions stored in the memory.
As shown in fig. 6, the DMRS configuring apparatus further includes a communication interface 63, configured to exchange information with other devices. Meanwhile, the DMRS configuration apparatus further includes a bus 64, and the processor 62, the communication interface 63, and the memory 61 complete communication with each other through the bus 64.
The memory 61 may comprise a high-speed RAM memory, and may further comprise a non-volatile memory (e.g., at least one disk memory). The memory 61 may also be a memory array. The storage 61 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules.
Further, the processor 62 may be a central processing unit CPU, or may be an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement embodiments of the present disclosure.
The disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement the method according to any one of the embodiments in fig. 1, 2, and 4.
Fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure. As shown in fig. 7, the base station 70 includes a DMRS configuration device 71. The DMRS configuring device 71 is the DMRS configuring device according to any one of the embodiments of fig. 5 and 6.
For example, the coverage radius D of the cell is 300 meters, and 7 SSB beams are configured, and the terminal measures that the signals of the SSB beam 5 and the SSB beam 6 are strongest, and then determines the corresponding sector according to the SSB beam 5 and the SSB beam 6. If the TA when the user terminal randomly accesses is 600us, the distance L is 180 meters and the distance exceeding D/2 is 150 meters calculated by TA × C. If the initial value of the parameter m is 5 meters, the adjustment step length x is 1 meter. And scanning a target area in the sector, which is positioned at [175, 185] m, by using a radar, and if the proportion of the detection result of the user terminal positioned in the target area to all the detection results is less than 90% within the range of 1 hour, changing the value of m to be 6. And further scanning a target area positioned in [174, 186] meters in the sector by using a radar, and stopping adjusting the parameter m if the proportion of the detection result of the user terminal positioned in the target area to all the detection results is greater than or equal to 90% within the range of 1 hour. And then, if the ratio of the total number of the objects with the moving speed greater than the preset speed threshold to all the moving objects in the target area is not greater than a second ratio threshold, namely the target area is located in a pedestrian area, no additional DMRS is configured for the user terminal.
In some embodiments, the functional units described above can be implemented as general purpose processors, Programmable Logic Controllers (PLCs), 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, or any suitable combination thereof for performing the functions described in this disclosure.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (15)
1. A demodulation reference signal (DMRS) configuration method is executed by a DMRS configuration device and comprises the following steps:
under the condition that a user terminal is randomly accessed into a cell, identifying a target area where the user terminal is located;
scanning the target area by using a preset beam to determine the motion state of all moving objects in the target area;
if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not less than a first proportion threshold, configuring an additional DMRS for the user terminal through a Radio Resource Control (RRC) reconfiguration message;
and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is less than the first proportion threshold.
2. The method of claim 1, wherein the identifying the target segment in which the user terminal is located comprises:
acquiring two SSB wave beams of the user terminal with strongest time advance TA and reference signal received power RSRP;
determining the distance L between the user terminal and a base station in the cell according to the TA;
determining a corresponding sector according to the two SSB wave beams;
and determining a target area where the user terminal is located according to the distance L and the sector.
3. The method of claim 2, wherein the determining the target segment where the user terminal is located according to the distance and the sector comprises:
dividing the sector into a first area and a second area which are equal in width in the direction away from the base station, wherein the second area is positioned on one side of the first area away from the base station;
dividing the first area into a plurality of sub-slice areas with equal width in a direction away from the base station;
if the user terminal is located in the first area, determining a sub-area where the user terminal is located according to the distance L, and taking the sub-area where the user terminal is located as the target area;
and if the user terminal is located in the second area, selecting the target area in the second area by using a first interval threshold L + m and a second interval threshold L-m in the direction away from the base station, wherein m is a preset parameter.
4. The method of claim 3, further comprising:
after the target area is selected, whether the user terminal is located in the target area is detected within a preset time range according to positioning information reported by the user terminal;
and if the proportion of the detection result of the user terminal in the target area to all the detection results is smaller than a preset value, increasing m by a preset step length until the proportion of the detection result of the user terminal in the target area to all the detection results is not smaller than the preset value.
5. The method of any of claims 1-4, further comprising:
if the proportion of the total number of the objects with the moving speed larger than the preset speed threshold in all the moving objects is smaller than a first proportion threshold and larger than a second proportion threshold, detecting whether the proportion of the motor vehicle driving road area in the target area in the total area of the target area is larger than a preset area threshold;
and if the proportion of the motor vehicle driving road area in the target area to the total area of the target area is greater than a preset area threshold, configuring an additional DMRS for the user terminal through an RRC reconfiguration message.
6. The method of claim 5, further comprising:
and if the proportion of the motor vehicle driving road area in the target area to the total area of the target area is not greater than a preset area threshold, not configuring the additional DMRS for the user terminal.
7. An apparatus for DMRS configuration, comprising:
the system comprises a first processing module, a second processing module and a third processing module, wherein the first processing module is configured to identify a target area where a user terminal is located under the condition that the user terminal randomly accesses a cell;
a second processing module configured to scan the target patch with a predetermined beam to determine motion states of all moving objects in the target patch;
a third processing module configured to configure an additional DMRS for the user terminal through an RRC reconfiguration message if, in all the moving objects, a ratio of a total number of objects having a moving speed greater than a preset speed threshold to all the moving objects is not less than a first ratio threshold; and if the proportion of the total number of the objects with the moving speed greater than the preset speed threshold in all the moving objects is not greater than a second proportion threshold, not configuring the additional DMRS for the user terminal, wherein the second proportion threshold is less than the first proportion threshold.
8. The apparatus of claim 7, wherein,
the first processing module is configured to acquire two SSB beams of a timing advance TA of the user terminal and two SSB beams of a synchronization signal block with strongest reference signal received power RSRP, determine a distance L between the user terminal and a base station in the cell according to the TA, determine a corresponding sector according to the two SSB beams, and determine a target slice area where the user terminal is located according to the distance L and the sector.
9. The apparatus of claim 8, wherein,
the first processing module is configured to divide the sector into a first area and a second area with equal width in a direction away from the base station, where the second area is located on a side, away from the base station, of the first area, divide the first area into a plurality of sub-slice areas with equal width in the direction away from the base station, determine, if the user terminal is located in the first area, a sub-slice area where the user terminal is located according to the distance L, and use the sub-slice area where the user terminal is located as the target slice area, and select, if the user terminal is located in the second area, the target slice area in the second area by using a first interval threshold L + m and a second interval threshold L-m in the direction away from the base station, where m is a preset parameter.
10. The apparatus of claim 9, wherein,
the first processing module is configured to detect whether the user terminal is located in the target parcel or not according to positioning information reported by the user terminal within a preset time range after the target parcel is selected, and if the proportion of the detection results of the user terminal located in the target parcel to all the detection results is smaller than a preset value, increase m by a preset step length until the proportion of the detection results of the user terminal located in the target parcel to all the detection results is not smaller than the preset value.
11. The apparatus of any one of claims 7-10,
the third processing module is configured to detect whether a ratio of a motor vehicle driving road area in the target region to a total area of the target region is greater than a preset area threshold if a ratio of a total number of objects having a movement speed greater than a preset speed threshold to the total number of the moving objects in the total number of the moving objects is smaller than a first ratio threshold and greater than a second ratio threshold, and configure an additional DMRS for the user terminal through an RRC reconfiguration message if the ratio of the motor vehicle driving road area in the target region to the total area of the target region is greater than the preset area threshold.
12. The apparatus of claim 11, wherein,
and the third processing module is configured to not configure the additional DMRS for the user terminal if the proportion of the motor vehicle driving road area in the target area to the total area of the target area is not greater than a preset area threshold.
13. An apparatus for DMRS configuration, comprising:
a memory configured to store instructions;
a processor coupled to the memory, the processor configured to perform implementing the method of any of claims 1-6 based on instructions stored by the memory.
14. A base station comprising the DMRS configuration apparatus of any one of claims 7-13.
15. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1-6.
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