CN106856628B - method and device for restraining virtual detection of random access channel - Google Patents

method and device for restraining virtual detection of random access channel Download PDF

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CN106856628B
CN106856628B CN201510908860.XA CN201510908860A CN106856628B CN 106856628 B CN106856628 B CN 106856628B CN 201510908860 A CN201510908860 A CN 201510908860A CN 106856628 B CN106856628 B CN 106856628B
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frequency domain
domain resource
sinr
prach
threshold value
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CN106856628A (en
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刘燕武
张孝中
肖辉
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

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Abstract

The invention relates to the technical field of communication, and discloses a method and a device for inhibiting virtual detection of a random access channel, wherein the method comprises the following steps: acquiring a first position of a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information; determining Physical Uplink Shared Channel (PUSCH) service scheduling information needing scheduling of an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE for scheduling PUSCH service in a set time period before the current moment according to the service scheduling information, and determining an SINR average value of each UE according to the SINR information; allocating a second frequency domain resource to each UE according to the SINR average value corresponding to each UE and the first position; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.

Description

Method and device for restraining virtual detection of random access channel
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for suppressing false detection in a random access channel.
background
in a Time Division Duplex (TDD) system, in order to increase Uplink capacity, resources of all Uplink Resource Blocks (RBs) need to be maximally utilized as much as possible, so that in some scenarios, a Physical Uplink Shared Channel (PUSCH) Channel needs to share frequency domain resources of a Physical Random Access Channel (PRACH) Channel; or, the PUSCH service is sent in an RB adjacent to the frequency domain resource occupied by the PRACH channel, but in the two resource scheduling scenarios, the false detection probability is easily too high (because the higher the Signal to Interference noise Ratio (SINR) of the PUSCH service is, the higher the false detection probability is, and the SINR of the PUSCH service is increased in both the above two resource scheduling scenarios).
In a large-scale Multiple-Input Multiple-Output (Massive MIMO) system, because the number of designed channels is large, the number of antennas is large, the antenna diversity gain is high for uplink, the SINR of a corresponding base station receiving end is high, and the PUSCH signal energy is leaked on each antenna, so that the correlation between the antennas is enhanced, and thus the probability of false detection is increased.
disclosure of Invention
the invention provides a method and a device for inhibiting virtual detection of a random access channel, which solve the problem of overlarge probability of virtual detection of a PRACH channel in the conventional Massive MIMO system.
the embodiment of the invention provides a method for inhibiting virtual detection of a random access channel, which comprises the following steps:
Acquiring a first position of a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
Determining Physical Uplink Shared Channel (PUSCH) service scheduling information needing scheduling of an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE for scheduling PUSCH service in a set time period before the current moment according to the service scheduling information, and determining an SINR average value of each UE according to the SINR information;
Allocating a second frequency domain resource to each UE according to the SINR average value corresponding to each UE and the first position; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
Optionally, according to a frequency selection principle, a distance between an RB position of a resource block allocated to send a PUSCH service and an RB position configured by a PRACH channel default is smaller than a set value, and in a sending period of a system message SIB2, a second frequency domain resource is allocated to each UE according to the SINR average value and the first position corresponding to each UE, further including:
And adjusting the position of the first frequency domain resource allocated by the PRACH according to a preset rule, so that the distance value between a second position corresponding to the second frequency domain resource and the first position is greater than the distance between the second position and the first position before adjustment.
Optionally, after allocating a second frequency domain resource to each UE according to the SINR average value corresponding to each UE and the first position, the method further includes:
Based on PRACH configuration information and PUSCH service scheduling information, determining that the spacing distance between a first frequency domain resource allocated by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value, and calculating a first SINR (signal to interference plus noise ratio) on an RB corresponding to the second frequency domain resource;
and comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
optionally, adjusting the virtual inspection suppression threshold value of the virtual inspection of the first frequency domain resource and the second frequency domain resource according to the comparison result includes:
If the first SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of PRACH false detection, then increasing a false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or
and if the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted by the PRACH.
The embodiment of the invention also provides another method for inhibiting the virtual detection of the random access channel, which comprises the following steps
Determining a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
When the spacing distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold, calculating the signal-to-noise ratio (SINR) on the RB corresponding to the second frequency domain resource;
And comparing the SINR with a preset threshold value of the PRACH virtual detection, and adjusting the virtual detection inhibition threshold value of the virtual detection of the first frequency domain resource and the second frequency domain resource according to the comparison result.
Optionally, adjusting the virtual inspection suppression threshold value of the virtual inspection of the first frequency domain resource and the second frequency domain resource according to the comparison result includes:
If the SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of the PRACH false detection, increasing a false detection suppression threshold value for performing the false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or
and if the SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before the time domain signal transmitted through the PRACH channel is subjected to down-sampling processing.
the embodiment of the invention provides a device for restraining virtual detection of a random access channel, which comprises:
a resource location determining module, configured to obtain, based on PRACH configuration information of a physical random access channel, a first location of a first frequency domain resource allocated by the PRACH;
The system comprises a signal-to-noise ratio detection module, a signal-to-noise ratio detection module and a signal-to-noise ratio detection module, wherein the signal-to-noise ratio detection module is used for determining Physical Uplink Shared Channel (PUSCH) service scheduling information needing to be scheduled of an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE for scheduling PUSCH service in a set time period before the current moment according to the service scheduling information, and determining;
A resource configuration module, configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first position corresponding to each UE; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
optionally, when, according to a frequency selection principle, an interval distance between an RB position allocated to send a PUSCH service and an RB position configured by a PRACH channel by default is smaller than a set value, and in a sending period of a system message SIB2, the resource configuration module is further configured to adjust a position of a first frequency domain resource allocated by the PRACH channel according to a preset rule, so that an interval distance value between a second position corresponding to the second frequency domain resource and the first position is greater than a distance between the second position and the first position before adjustment.
optionally, the apparatus further comprises:
The virtual detection adjusting module is used for determining that the spacing distance between a first frequency domain resource distributed by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value based on the PRACH configuration information and the PUSCH service scheduling information, and calculating a first SINR (signal to interference plus noise ratio) on the RB corresponding to the second frequency domain resource; and comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
Optionally, the virtual detection adjusting module is specifically configured to:
When the first SINR is larger than a preset lowest threshold value of PRACH virtual detection and smaller than a preset highest threshold value, increasing a virtual detection suppression threshold value for performing virtual detection on the first frequency domain resource and the second frequency domain resource according to the corresponding relation between preset SINR grade segmentation and a virtual alarm suppression threshold; or
And when the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted through the PRACH.
the embodiment of the invention also provides another device for inhibiting the virtual detection of the random access channel, which comprises
The resource position determining module is used for determining a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information; determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
The signal-to-noise ratio detection module is used for calculating the signal-to-noise ratio SINR on the RB corresponding to the second frequency domain resource when the spacing distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold;
and the threshold adjusting module is used for comparing the SINR with a preset threshold value of the PRACH virtual detection and adjusting the virtual detection inhibition threshold value of the first frequency domain resource and the second frequency domain resource in the virtual detection according to the comparison result.
Optionally, the threshold adjustment module is specifically configured to, if the SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of PRACH false detection, increase a false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or if the SINR is greater than the preset maximum threshold value, processing the PRACH time domain signal by an N-order equiripple filter before downsampling the time domain signal transmitted through the PRACH channel.
One or two of the above technical solutions have at least the following technical effects:
the method and the device provided by the embodiment of the invention can be used for scheduling the PUSCH service of the UE with smaller SINR to the adjacent PRACH or the used channel resource of the PRACH under the network scene with a plurality of UEs, so that even if the adjacent PRACH or the used channel resource RB of the PRACH (namely the same resource is used in an overlapping way) is required to be used, the residual PUSCH signal after the down sampling of the PRACH is smaller due to the smaller SINR corresponding to the adjacent or overlapped PUSCH service, thereby reducing the probability of the virtual detection of the PRACH.
Drawings
fig. 1 is a flowchart illustrating a method for suppressing false detection of a random access channel according to an embodiment of the present invention;
Fig. 2 is a flowchart illustrating a method for suppressing false detection of a random access channel according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for suppressing false detection of a random access channel according to a third embodiment of the present invention;
Fig. 4 is a flowchart illustrating a method for suppressing false detection of a random access channel according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for suppressing false detection of a random access channel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another apparatus for suppressing false detection of a random access channel according to an embodiment of the present invention.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a method for suppressing false detection in a random access channel, where the method includes:
Step 101, acquiring a first position of a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
102, determining PUSCH service scheduling information of a Physical Uplink Shared Channel (PUSCH) required to be scheduled at an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE for scheduling the PUSCH service in a set time period before the current moment according to the service scheduling information, and determining an SINR average value of each UE according to the SINR information;
103, allocating a second frequency domain resource to each UE according to the SINR average value and the first position corresponding to each UE; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, a specific implementation that a distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than a distance value between the position of the frequency domain resource allocated to the second UE and the first position (that is, an interval distance value between the second position and the first position corresponding to the second frequency domain resource is proportional to the SINR average value) may be:
When the SINR average value of a certain UE is larger than the false detection SINR minimum threshold, setting the frequency domain resource corresponding to the UE at a frequency domain position far away from the PRACH channel;
If the SINR average value of a certain UE is smaller than the false detection SINR minimum threshold, the frequency domain resource corresponding to the UE can be arranged at the position close to the PRACH channel frequency domain;
If the SINR average value of a certain UE is the lowest and is less than the false detection SINR lowest threshold, the frequency domain resource corresponding to the UE may be overlapped with the PRACH resource.
in this embodiment, if the separation distance between the RB location of the resource block allocated for transmitting the PUSCH service and the RB location of the PRACH channel default configuration is smaller than a set value according to the frequency selection principle, and in a transmission period of the system message 2(SIB2), in order to achieve that the separation distance value between the second location and the first location corresponding to the second frequency-domain resource is proportional to the SINR average value, the location of the first frequency-domain resource may also be adjusted, and then specifically implemented by:
and adjusting the position of the first frequency domain resource allocated by the PRACH according to a preset rule, so that the distance value between a second position corresponding to the second frequency domain resource and the first position is greater than the distance between the second position and the first position before adjustment.
because the PUSCH channel shares the frequency domain resources of the PRACH channel; or, sending PUSCH traffic in the adjacent RB of the frequency domain resource occupied by the PRACH channel may all cause an increase in the virtual detection probability, and based on the foregoing embodiment, in order to avoid an increase in the virtual detection probability caused by resource sharing, the method provided in the embodiment of the present invention further adjusts the virtual detection threshold according to the detected SINR, and the specific implementation may be:
Based on PRACH configuration information and PUSCH service scheduling information, determining that the spacing distance between a first frequency domain resource allocated by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value, and calculating a first SINR (signal to interference plus noise ratio) on an RB corresponding to the second frequency domain resource;
And comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
Wherein adjusting the false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to the comparison result comprises:
if the first SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of PRACH false detection, then increasing a false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or
and if the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted by the PRACH.
Example two
as shown in fig. 2, the following describes a method for suppressing false detection of a random access channel according to an embodiment of the present invention with reference to a specific example, in which multiple UEs are scheduled in this embodiment, and the UEs are uniformly distributed at near-far midpoints, and the specific implementation may be:
Step 201, acquiring configuration information of a PRACH and scheduling information of a PUSCH service that an uplink UL subframe needs to be scheduled at a next time;
step 202, obtaining a history SINR record of UE corresponding to the PUSCH service;
step 203, according to the obtained historical SINR records, judging whether the RB level average SINR of the UE scheduling the PUSCH service is larger than the false detection SINR minimum threshold one by one, if so, turning to step 204; otherwise, go to step 205;
Step 204, the UE with the SINR larger than the lowest threshold of the false detection SINR is dispatched to a frequency domain position far away from the PRACH, and the dispatching process is ended;
Step 205, detecting whether frequency selection scheduling is required, wherein a period when the RB resource allocated for sending the PUSCH service and the RB resource configured by the PRACH channel default must be adjacent is an SIB2 sending period, and if yes, going to step 206; otherwise, go to step 207;
step 206, adjusting the frequency domain detection starting position of the PRACH, and avoiding the adjacent or overlapping distribution of the frequency domain resource of the PRACH and the frequency domain resource of the PUSCH service;
Step 207, allocating the frequency domain resource of the PUSCH service at the position adjacent to or overlapping the PRACH frequency domain resource.
by the implementation method of flexible scheduling provided by the embodiment of the invention, when multiple UEs exist and the PRACH needs to be used adjacently or overlappingly by using the PRACH channel resource RB, the residual PUSCH signal after the PRACH is subjected to down sampling is smaller because the SINR corresponding to the PUSCH service is smaller, so that the probability of PRACH virtual detection can be effectively reduced.
EXAMPLE III
as shown in fig. 3, another method for suppressing false detection of a random access channel is provided in an embodiment of the present invention, where the method includes
Step 301, determining a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
Step 302, determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
Step 303, when the distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold, calculating the signal-to-noise ratio SINR on the RB corresponding to the second frequency domain resource;
and 304, comparing the SINR with a preset threshold of PRACH false detection, and adjusting a false detection suppression threshold of the first frequency domain resource and the second frequency domain resource according to the comparison result.
Optionally, a specific implementation manner of adjusting the virtual inspection suppression threshold for the virtual inspection of the first frequency domain resource and the second frequency domain resource according to the comparison result includes:
If the SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of the PRACH false detection, increasing a false detection suppression threshold value for performing the false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or
and if the SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before the time domain signal transmitted through the PRACH channel is subjected to down-sampling processing.
example four
As shown in fig. 4, the following embodiments of the present invention, with reference to specific examples, schedule a PUSCH service on frequency domain resources adjacent to a PRACH channel, and when an SINR of a PUSCH service RB is less than 20db, reduce a false detection by dynamically setting a false alarm suppression relative threshold, where the processing steps are:
step 401, acquiring PRACH configuration information and PUSCH service scheduling information;
step 402, determining whether the adjacent RB of the PRACH channel or the used RB is allocated to the PUSCH for use according to the PRACH configuration information and the PUSCH service scheduling information, and if so, proceeding to step 403; otherwise, go to step 409;
Step 403, calculating SINR on RBs adjacent to or overlapped by PUSCH of the PRACH channel;
Step 404, judging whether the calculated SINR is greater than the lowest threshold (SINR _ Low) of the PRACH false detection and less than the highest threshold (SINR _ Highdb) of the PRACH false detection, if so, proceeding to step 406; otherwise, go to step 405;
step 405, if the calculated SINR is less than the lowest threshold (SINR _ Low) of the PRACH false detection, it is considered that the PUSCH leakage signal does not affect the detection of the PRACH, the false alarm suppression threshold value of the PRACH is not adjusted, and go to step 407;
step 406, inquiring a preset SINR-to-PRACH virtual inspection threshold value correspondence table according to the calculated SINR, acquiring a threshold value corresponding to the SINR, and adjusting the threshold value of the original PRACH virtual inspection by using the threshold value;
For example: and searching corresponding false alarm suppression thresholds in a segmented manner according to different SINR grades. For example, when there is 3db of PUSCH interference, the false alarm suppression threshold is dynamically increased, and the false detection rate is reduced from 0.42% to 0.01%.
step 407, judging whether the calculated SINR is greater than the highest threshold of the PRACH false detection, if so, turning to step 409; otherwise, go to step 408;
Step 408, if the SINR is greater than the highest threshold of PRACH false detection (SINR _ Highdb), add a first-stage filtering before downsampling;
Before down-sampling, an equiripple filter of N orders is added, the N orders are different according to different SIN settings, for example, when Ydb is provided in a pusch signal, after 1536-point time domain data after original filtering down-sampling is subjected to the 95-order equiripple filter, the false detection rate is reduced from 1.3% to about 0.05%.
step 409, PRACH detection processing.
EXAMPLE five
As shown in fig. 5, an embodiment of the present invention provides a device for suppressing false detection of a random access channel, where the device specifically includes:
A resource location determining module 501, configured to obtain, based on PRACH configuration information of a physical random access channel, a first location of a first frequency domain resource allocated by the PRACH;
a signal-to-noise ratio detection module 502, configured to determine scheduling information of a physical uplink shared channel PUSCH service that an uplink UL subframe needs to be scheduled at a next time, determine, according to the scheduling information of the service, historical signal-to-noise ratio SINR information of each terminal UE scheduling the PUSCH service in a set time period before a current time, and determine, according to the SINR information, an SINR average value of each UE;
a resource configuration module 503, configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first position corresponding to each UE; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
In this embodiment, when the separation distance between the RB position of the resource block allocated for transmitting the PUSCH service and the RB position of the PRACH channel default configuration is smaller than the set value according to the frequency selection principle, and in the transmission period of the system message 2(SIB2), then:
the resource configuration module 503 is further configured to adjust a position of the first frequency domain resource allocated by the PRACH according to a preset rule, so that an interval distance value between a second position corresponding to the second frequency domain resource and the first position is greater than a distance between the second position and the first position before adjustment.
further, the apparatus further comprises:
the virtual detection adjusting module is used for determining that the spacing distance between a first frequency domain resource distributed by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value based on the PRACH configuration information and the PUSCH service scheduling information, and calculating a first SINR (signal to interference plus noise ratio) on the RB corresponding to the second frequency domain resource; and comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
wherein, the virtual inspection adjusting module is specifically configured to:
when the first SINR is larger than a preset lowest threshold value of PRACH virtual detection and smaller than a preset highest threshold value, increasing a virtual detection suppression threshold value for performing virtual detection on the first frequency domain resource and the second frequency domain resource according to the corresponding relation between preset SINR grade segmentation and a virtual alarm suppression threshold; or
and when the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted through the PRACH.
EXAMPLE six
as shown in fig. 6, another apparatus for suppressing false detection of a random access channel according to an embodiment of the present invention includes
a resource location determining module 601, configured to determine, based on PRACH configuration information of a physical random access channel, a first frequency domain resource allocated by the PRACH; determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
A signal-to-noise ratio detection module 602, configured to calculate a signal-to-noise ratio SINR on an RB corresponding to the second frequency domain resource when a separation distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold;
A threshold adjusting module 603, configured to compare the SINR with a preset threshold of PRACH false detection, and adjust a false detection suppression threshold of the first frequency domain resource and the second frequency domain resource according to a comparison result.
optionally, the threshold adjusting module 603 is specifically configured to, if the SINR is greater than a preset lowest threshold value and less than a preset highest threshold value of PRACH false detection, increase a false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false alarm suppression threshold; or if the SINR is greater than the preset maximum threshold value, processing the PRACH time domain signal by an N-order equiripple filter before downsampling the time domain signal transmitted through the PRACH channel.
One or more technical solutions in the embodiments of the present application have at least the following technical effects:
the method and the device provided by the embodiment of the invention can be used for scheduling the PUSCH service of the UE with smaller SINR to the adjacent PRACH or the used channel resource of the PRACH under the network scene with a plurality of UEs, so that even if the adjacent PRACH or the used channel resource RB of the PRACH (namely the same resource is used in an overlapping way) is required to be used, the residual PUSCH signal after the down sampling of the PRACH is smaller due to the smaller SINR corresponding to the adjacent or overlapped PUSCH service, thereby reducing the probability of the virtual detection of the PRACH.
In addition, by dynamically adjusting the false alarm suppression threshold, when a scheduling scene that the PRACH is adjacent or the PRACH uses the channel resource RB to send the PUSCH service occurs, the false detection rate can be greatly reduced within a certain SINR range.
By adding the primary filtering processing, when a scheduling scene that the PRACH is adjacent or the PRACH uses the channel resource RB to send the PUSCH service occurs, the influence of the SINR on the PRACH detection can be removed through the filtering processing after the residual PUSCH signal exceeds a certain SINR.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (12)

1. a method for suppressing false detection in a random access channel, the method comprising:
acquiring a first position of a first frequency domain resource allocated to a Physical Random Access Channel (PRACH) based on PRACH configuration information;
determining Physical Uplink Shared Channel (PUSCH) service scheduling information needing scheduling of an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE (user equipment) scheduling PUSCH service in a set time period before the current moment according to the service scheduling information, and determining an SINR average value of each UE according to the SINR information;
allocating a second frequency domain resource to each UE according to the SINR average value corresponding to each UE and the first position; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
2. The method of claim 1, further comprising:
according to a frequency selection principle, when the spacing distance between the RB position of a resource block distributed for sending the PUSCH service and the RB position of PRACH channel default configuration is smaller than a set value, selecting a system message SIB2 sending period;
And adjusting the position of the first frequency domain resource allocated by the PRACH according to a preset rule, so that the distance value between a second position corresponding to the second frequency domain resource and the first position is greater than the distance between the second position and the first position before adjustment.
3. the method of claim 1 or 2, wherein after allocating a second frequency domain resource for each UE according to the SINR average value and the first position corresponding to each UE, the method further comprises:
Based on PRACH configuration information and PUSCH service scheduling information, determining that the spacing distance between a first frequency domain resource allocated by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value, and calculating a first SINR (signal to interference plus noise ratio) on an RB corresponding to the second frequency domain resource;
and comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
4. the method of claim 3, wherein adjusting the false detection suppression threshold for the false detection of the first frequency domain resource and the second frequency domain resource according to the comparison comprises:
If the first SINR is greater than a preset lowest threshold value of PRACH virtual inspection and less than a preset highest threshold value, increasing a virtual inspection suppression threshold value for performing virtual inspection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between preset SINR level segments and virtual inspection suppression threshold values; or
and if the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted by the PRACH.
5. a method for suppressing false detection of a random access channel includes
determining a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
When the spacing distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold, calculating the signal-to-noise ratio (SINR) on the RB corresponding to the second frequency domain resource;
and comparing the SINR with a preset threshold value of the PRACH virtual detection, and adjusting the virtual detection inhibition threshold value of the virtual detection of the first frequency domain resource and the second frequency domain resource according to the comparison result.
6. the method of claim 5, wherein adjusting the false detection suppression threshold for the false detection of the first frequency domain resource and the second frequency domain resource according to the comparison comprises:
if the SINR is greater than a preset minimum threshold value and less than a preset maximum threshold value of PRACH false detection, increasing a false detection suppression threshold value for performing false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between preset SINR level segments and the false detection suppression threshold value; or
And if the SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before the time domain signal transmitted through the PRACH channel is subjected to down-sampling processing.
7. An apparatus for suppressing false positive detection in a random access channel, the apparatus comprising:
A resource location determining module, configured to obtain, based on PRACH configuration information of a physical random access channel, a first location of a first frequency domain resource allocated by the PRACH;
The system comprises a signal-to-noise ratio detection module, a signal-to-noise ratio detection module and a signal-to-noise ratio detection module, wherein the signal-to-noise ratio detection module is used for determining Physical Uplink Shared Channel (PUSCH) service scheduling information needing to be scheduled of an Uplink (UL) subframe at the next moment, judging historical signal-to-noise ratio (SINR) information of each terminal UE for scheduling PUSCH service in a set time period before the current moment according to the service scheduling information, and determining;
a resource configuration module, configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first position corresponding to each UE; when the SINR average value corresponding to the first UE is greater than the SINR average value corresponding to the second UE, the distance value between the position of the frequency domain resource allocated to the first UE and the first position is greater than the distance value between the position of the frequency domain resource allocated to the second UE and the first position.
8. The apparatus of claim 7, wherein when a spacing distance between an RB location allocated for sending a PUSCH service and an RB location of a PRACH channel default configuration is smaller than a set value according to a frequency selection principle, a system message SIB2 is selected for sending a cycle, and the resource configuration module is further configured to adjust a location of a first frequency domain resource allocated for the PRACH according to a preset rule, so that a spacing distance value between a second location corresponding to the second frequency domain resource and the first location is greater than a distance between the second location and the first location before the adjustment.
9. The apparatus of claim 7 or 8, further comprising:
The virtual detection adjusting module is used for determining that the spacing distance between a first frequency domain resource distributed by the PRACH and a second frequency domain resource scheduled by the PUSCH is smaller than a set threshold value based on the PRACH configuration information and the PUSCH service scheduling information, and calculating a first SINR (signal to interference plus noise ratio) on the RB corresponding to the second frequency domain resource; and comparing the first SINR with a preset threshold value of PRACH virtual inspection, and adjusting a virtual inspection suppression threshold value of the first frequency domain resource and the second frequency domain resource according to a comparison result.
10. the apparatus of claim 9, wherein the virtual detection adjustment module is specifically configured to:
when the first SINR is larger than a preset lowest threshold value of PRACH virtual detection and smaller than a preset highest threshold value, increasing a virtual detection inhibition threshold value for performing virtual detection on the first frequency domain resource and the second frequency domain resource according to the corresponding relation between preset SINR grade segmentation and the virtual detection inhibition threshold value; or
And when the first SINR is larger than the preset highest threshold value, processing the PRACH time domain signal through an N-order equiripple filter before down-sampling the signal transmitted through the PRACH.
11. An apparatus for suppressing false detection in a random access channel, the apparatus comprising
the resource position determining module is used for determining a first frequency domain resource allocated by a Physical Random Access Channel (PRACH) based on PRACH configuration information;
determining a second frequency domain resource to be scheduled by a Physical Uplink Shared Channel (PUSCH) of an Uplink (UL) subframe;
the signal-to-noise ratio detection module is used for calculating the signal-to-noise ratio SINR on the RB corresponding to the second frequency domain resource when the spacing distance between the first frequency domain resource and the second frequency domain resource is smaller than a set threshold;
and the threshold adjusting module is used for comparing the SINR with a preset threshold value of the PRACH virtual detection and adjusting the virtual detection inhibition threshold value of the first frequency domain resource and the second frequency domain resource in the virtual detection according to the comparison result.
12. The apparatus of claim 11, wherein the threshold adjustment module is specifically configured to increase the false detection suppression threshold for performing the false detection on the first frequency domain resource and the second frequency domain resource according to a corresponding relationship between a preset SINR level segment and a false detection suppression threshold if the SINR is greater than a preset lowest threshold for the false detection of the PRACH and less than a preset highest threshold; or if the SINR is greater than the preset maximum threshold value, processing the PRACH time domain signal by an N-order equiripple filter before downsampling the time domain signal transmitted through the PRACH channel.
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