WO2017097055A1

WO2017097055A1 - Method and device for random access channel

Info

Publication number: WO2017097055A1
Application number: PCT/CN2016/103765
Authority: WO
Inventors: 刘燕武; 张孝中; 肖辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-12-09
Filing date: 2016-10-28
Publication date: 2017-06-15
Also published as: CN106856628B; CN106856628A

Abstract

A method and device for a random access channel. The method comprises: acquiring, on the basis of physical random access channel (PRACH) configuration information, a first position of a first frequency domain resource allocated to the PRACH; determining physical uplink shared channel (PUSCH) service scheduling information to be scheduled for an uplink (UL) subframe of the next time instance, acquiring, according to the determined PUSCH service scheduling information, past signal to interference and noise ratio (SINR) information of each terminal UE of the scheduled PUSCH service within a preset time interval before the current time instance, and determining, according to the SINR information, an SINR average value of said UE; and allocating, according to the SINR average value corresponding to said UE and the first position, a second frequency domain resource to said UE, wherein if an SINR average value of a first UE is greater than an SINR average value of a second UE, then a distance value between a position of a second frequency domain resource correspondingly allocated to the first UE and the first position is greater than a distance value between a position of a second frequency domain resource correspondingly allocated to the second UE and the first position. Embodiments of the present invention lowers a false positive rate.

Description

Method and device for randomly accessing channels

Technical field

This document relates to, but is not limited to, the field of communication technologies, and in particular, to a method and apparatus for randomly accessing a channel.

Background technique

In the Time Division Duplexing (TDD) system, in order to improve the uplink capacity, it is necessary to utilize all the resources of the uplink resource block (RB). Therefore, in some scenarios, a physical uplink shared channel is required. A physical uplink access channel (PUSCH) channel shares a frequency domain resource of a physical random access channel (PRACH) channel; or a service that transmits a PUSCH to a neighboring RB of a frequency domain resource occupied by a PRACH channel. However, in the case of the two resource scheduling scenarios, the probability of the virtual check is too high (because the greater the Signal to Interference plus Noise Ratio (SINR) of the PUSCH service, the greater the probability of the virtual check.

In the Massive Multiple-Input Multiple-Output (Massive MIMO) system, the number of channels is designed. For the uplink, the more antennas, the higher the antenna diversity gain, and the SINR of the corresponding base station receiver. The higher the PUSCH signal energy is leaked on each antenna, the correlation between the antennas is enhanced, and the probability of false detection is increased. In the above two resource scheduling scenarios, the PRACH channel is virtual in the Massive MIMO system. The probability of detection is much higher than that of non-Massive MIMO systems.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and a device for randomly accessing a channel, which can reduce the false detection probability of the PRACH channel.

An embodiment of the present invention provides a method for randomly accessing a channel, where the method includes:

Acquiring the PRACH configuration information based on the physical random access channel The first location of the first frequency domain resource;

Determining the physical uplink shared channel PUSCH service scheduling information that needs to be scheduled in the uplink UL subframe at the next moment, and obtaining, according to the determined PUSCH service scheduling information, a history of each terminal UE that schedules the PUSCH service before the current time SNR SINR information, determining an average SINR of each UE according to the obtained SINR information;

Allocating a second frequency domain resource to each of the UEs according to the SINR average value and the first location corresponding to the UE; wherein, the SINR average value corresponding to the first UE is greater than that of the second UE The SINR average value, the distance value between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than the second frequency domain resource corresponding to the second UE The distance between the location and the first location.

Optionally, according to the frequency selection principle, a separation distance between a resource block RB location allocated for transmitting the PUSCH service and an RB location configured by default of the PRACH channel is less than a set value, and when the system message SIB2 is sent,

And adjusting, according to a preset rule, a location of the first frequency domain resource allocated by the PRACH, such that a distance between the second location corresponding to the second frequency domain resource and the first location is greater than adjusting the second The distance between the location before the frequency domain resource and the first location.

Optionally, after the allocating the second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE, the method further includes:

And determining, according to the PRACH configuration information and the PUSCH service scheduling information, that the interval between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH is less than a set threshold, calculating a second frequency domain resource corresponding The first SINR on the RB;

Comparing the first SINR with a preset threshold value of the PRACH virtual check, and adjusting the virtual check suppression threshold of the first frequency domain resource and the second frequency domain resource according to the comparison result .

The adjusting, by the comparison, the virtual check suppression threshold of the first frequency domain resource and the second frequency domain resource to perform the virtual check includes:

If the first SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the corresponding relationship between the preset SINR level segment and the virtual check suppression threshold is increased. Determining, by the first frequency domain resource and the second frequency domain resource, a false check suppression threshold of the virtual check; or

The first SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by an N-order isosceles filter before the signal downsampling process by the PRACH transmission.

An embodiment of the present invention further provides another method for randomly accessing a channel, where the method includes

Determining, by the PRACH configuration information of the physical random access channel, the first frequency domain resource allocated by the PRACH;

Determining a third frequency domain resource of the physical uplink shared channel PUSCH scheduling that needs to be scheduled in the uplink UL subframe;

When the distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold, calculating a signal to noise ratio SINR on the RB corresponding to the third frequency domain resource;

The SINR is compared with a preset threshold of the PRACH virtual check, and the virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource is falsely adjusted according to the comparison result.

Optionally, the adjusting, by the comparison result, the virtual check suppression threshold of performing false check on the first frequency domain resource and the third frequency domain resource includes:

And the SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, and is adjusted to the first frequency domain according to a preset relationship between the preset SINR level segment and the virtual check suppression threshold. a virtual check suppression threshold for the virtual check of the resource and the third frequency domain resource; or

The SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by an N-order isosceles filter before the time domain signal downsampling process transmitted through the PRACH channel.

An embodiment of the present invention provides a device for randomly accessing a channel, where the device includes:

a resource location determining module, configured to acquire, according to a physical random access channel PRACH configuration information, a first location of the first frequency domain resource allocated by the PRACH;

The SNR detection module is configured to determine the physical uplink shared channel PUSCH service scheduling information that needs to be scheduled in the uplink UL subframe at the next moment, and obtain the scheduled PUSCH service according to the determined PUSCH service scheduling information, and each terminal UE is set before the current time. The historical signal to noise ratio (SINR) information in the fixed time period, and determining an average value of the SINR of each UE according to the obtained SINR information;

a resource configuration module, configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE; where, the SINR average value corresponding to the first UE The value of the distance between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than the value of the second UE corresponding to the second UE. The distance value between the location of the second frequency domain resource and the first location.

Optionally, the resource configuration module is further configured to: according to a frequency selection principle, a separation distance between a resource block RB location allocated for transmitting a PUSCH service and an RB location configured by default of a PRACH channel is less than a set value, and the system message is During the sending period of the SIB2, the location of the first frequency domain resource allocated by the PRACH is adjusted according to a preset rule, so that the distance between the second location corresponding to the second frequency domain resource and the first location is Greater than a distance between the position before the second frequency domain resource and the first location.

Optionally, the device further includes:

The virtual check adjustment module is configured to determine, according to the PRACH configuration information and the PUSCH service scheduling information, that the interval between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH is less than a set threshold, Calculating a first SINR on the RB corresponding to the second frequency domain resource; comparing the first SINR with a preset threshold of the PRACH virtual check, and comparing the first frequency domain resource and the second frequency according to the comparison result The domain resource performs the virtual check suppression threshold of the virtual check to adjust.

Optionally, the virtual check adjustment module is set to:

When the first SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the corresponding relationship between the preset SINR level segment and the virtual check suppression threshold is increased. a virtual detection suppression threshold value of the virtual domain for the frequency domain resource and the second frequency domain resource; or

When the first SINR is greater than the preset maximum threshold, the PRACH time domain signal is processed by an N-order isosceles filter before the signal downsampling process by the PRACH transmission.

An embodiment of the present invention further provides another apparatus for randomly accessing a channel, where the apparatus includes:

a determining module, configured to determine a first frequency domain resource allocated by the PRACH based on the physical random access channel PRACH configuration information; and determine a physical uplink that needs to be scheduled in the uplink UL subframe a third frequency domain resource of the shared channel PUSCH scheduling;

a detecting module, configured to calculate a signal to noise ratio (SINR) on the RB corresponding to the third frequency domain resource when the distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold;

The adjusting module is configured to compare the SINR with a preset threshold of the PRACH virtual check, and perform a virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource according to the comparison result. The value is adjusted.

Optionally, the adjusting module is configured to: when the SINR is greater than a preset minimum threshold of the PRACH virtual check and less than a preset maximum threshold, according to a preset SINR level segment and a virtual check suppression threshold And raising a false check suppression threshold for performing false check on the first frequency domain resource and the third frequency domain resource; or if the SINR is greater than the preset maximum threshold, transmitting to the PRACH channel The PRACH time domain signal is processed by an N-order isosceles filter before the time domain signal downsampling process.

Compared with the related art, the technical solution provided by the embodiment of the present invention includes: acquiring, according to physical random access channel (PRACH) configuration information, a first location of a first frequency domain resource allocated by a PRACH; determining an uplink at a next moment The (UL) subframe needs to schedule physical uplink shared channel (PUSCH) service scheduling information, and obtains a historical signal-to-noise ratio (SINR) in a time period set by each terminal UE before the current time according to the determined PUSCH service scheduling information. The information, the SINR average value of each UE is determined according to the SINR information; the second frequency domain resource is allocated to each UE according to the SINR average value and the first location corresponding to each UE; The average value of the SINR corresponding to the UE is greater than the average value of the SINR corresponding to the second UE, and the distance between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than that of the second UE. The distance value between the location of the second frequency domain resource assigned to the first location. Embodiments of the present invention reduce the probability of false detection. The method and the device provided by the embodiments of the present invention, in a network scenario where multiple UEs are present, scheduling a PUSCH service with a smaller SINR than a small UE to a channel resource used by a PRACH neighbor or a PRACH, so even if a PRACH neighbor or a PRACH is used The channel resources RB (that is, the same resource is used in an overlapping manner), because the SINR corresponding to the adjacent or overlapping PUSCH service is relatively small, the residual PUSCH signal after the PRACH is downsampled is relatively small, so that the probability of PRACH false detection is reduced.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic flowchart of a method for randomly accessing a channel according to Embodiment 1 of the present invention;

2 is a schematic flowchart of a method for randomly accessing a channel according to Embodiment 2 of the present invention;

FIG. 3 is a schematic flowchart of a method for randomly accessing a channel according to Embodiment 3 of the present invention; FIG.

4 is a schematic flowchart of a method for randomly accessing a channel according to Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for randomly accessing a channel according to an embodiment of the present invention;

FIG. 6 is a structural block diagram of another apparatus for randomly accessing a channel according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Embodiment 1

As shown in FIG. 1 , an embodiment of the present invention provides a method for randomly accessing a channel, where the method includes:

Step 101: Acquire, according to physical random access channel (PRACH) configuration information, a first location of a first frequency domain resource allocated by the PRACH.

Step 102: Determine physical uplink shared channel (PUSCH) service scheduling information that needs to be scheduled in an uplink (UL) subframe at a next moment, and obtain a scheduled PUSCH service according to the determined PUSCH service scheduling information. Each terminal UE is set before the current time. Historical signal to noise ratio (SINR) information in a time period, and determining an average value of SINR of each UE according to the obtained SINR information;

It should be noted that the method for obtaining the signal-to-noise ratio is a conventional technique used in uplink measurement, and is often used for some detection decisions and scheduling of uplink. A smoothing method may be used for setting the time period. For example, each UL subframe will smooth the current SINR and the historical SINR, and the current SINR occupies a time period exceeding a preset percentage threshold, and the percentage threshold is It may be a value greater than or equal to 50%, for example, 60%, and the proportion of historical weight in the SINR of the set time period is mainly to avoid misjudgment due to sudden changes in SINR.

Step 103: Allocating a second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE; wherein, when the average value of the SINR corresponding to the first UE is greater than the average value of the SINR corresponding to the second UE, Then, the location and the first location of the second frequency domain resource corresponding to the first UE The distance value between the locations is greater than the distance between the location of the second frequency domain resource to which the second UE is allocated and the first location.

Optionally, when the average value of the SINR corresponding to the first UE is greater than the average value of the SINR corresponding to the second UE, the distance between the location of the second frequency domain resource corresponding to the first UE and the first location And a distance value between the location of the second frequency domain resource corresponding to the second UE and the first location (ie, the interval distance value between the second location and the first location corresponding to the second frequency domain resource and the SINR average Implementations that are proportional to the value can include:

When the SINR average value of the UE is greater than the virtual SINR minimum threshold, the second frequency domain resource corresponding to the UE is set in a frequency domain location away from the PRACH channel;

If the SINR average value of the UE is smaller than the virtual SINR minimum threshold, the second frequency domain resource corresponding to the UE may be set in a frequency domain position adjacent to the PRACH channel;

If the average SINR of a certain UE is the lowest and less than the minimum threshold of the virtual SINR, the second frequency domain resource corresponding to the UE may be overlapped with the PRACH resource.

It should be noted that the virtual check SINR minimum threshold may include a threshold set by the system simulation.

In an optional embodiment, if according to the frequency selection principle, the separation distance between the resource block RB location allocated for transmitting the PUSCH service and the RB location of the PRACH channel default configuration is less than a set value, and in System Message 2 (SIB2) In the sending period, in order to achieve that the distance between the second location and the first location corresponding to the second frequency domain resource is proportional to the SINR average value, the embodiment of the present invention may further adjust the location of the first frequency domain resource, Can include:

The position of the first frequency domain resource allocated by the PRACH is adjusted according to a preset rule, so that the interval distance between the second location corresponding to the second frequency domain resource and the first location is greater than the position before adjusting the second frequency domain resource. The distance between a position.

It should be noted that the frequency selection principle may include a general principle of selecting a quality channel for the UE. The set value can be set by a person skilled in the art according to the data of the system simulation, and generally can be 2 to 3 RB.

Because the PUSCH channel shares the frequency domain resources of the PRACH channel, or the services of the PUSCH transmitted by the neighboring RBs of the frequency domain resources occupied by the PRACH channel, the probability of the virtual check is increased, and the resource sharing is avoided in the case of the foregoing embodiment. The probability of false detection increases, the present invention The method provided by the embodiment further adjusts the threshold value of the virtual check according to the detected SINR, and the implementation may include:

And determining, according to the PRACH configuration information and the PUSCH service scheduling information, that the interval between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH is less than a set threshold, calculating the number corresponding to the RB of the second frequency domain resource An SINR; here, the set threshold can be determined by means of system simulation, and the general set threshold can be 3 RB. A method of calculating the first SINR is a conventional technique of those skilled in the art.

The first SINR is compared with a preset threshold of the PRACH virtual check, and the virtual check suppression threshold of the first frequency domain resource and the second frequency domain resource is falsely adjusted according to the comparison result. Here, the initial dummy check suppression threshold can be obtained by system simulation. Different values are set under different antennas (Ant), and different values are adaptively configured according to the number of Ants of the base station. For example, under 8Ant, the configuration is 179. .

The adjusting the false check suppression threshold for performing the virtual check on the first frequency domain resource and the second frequency domain resource according to the comparison result includes:

If the first SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the first frequency domain resource is adjusted according to the preset relationship between the SINR level segment and the virtual check suppression threshold. The second frequency domain resource performs a false check suppression threshold of the virtual check; or

The first SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by the N-order isosceles filter before the down-sampling process of the signal transmitted by the PRACH.

It should be noted that the preset minimum threshold and the preset maximum threshold may be determined according to system simulation. Different values are set under different Ants, and different thresholds may be adaptively configured according to the number of Ants of the base station. In the embodiment of the present invention, the thresholds for suppressing the false check are different, and the false check suppression thresholds are respectively set in different SINR ranges. The threshold setting is based on the values corresponding to different SINRs given by the system simulation; the correspondence between the SINR level segmentation and the virtual check suppression threshold is obtained by the system simulation, which is equivalent to constructing a simple correspondence according to the simulation.

In the embodiment of the present invention, the PRACH time domain signal can be processed by using a 50th-order ripple filter.

The method for randomly accessing the channel in the embodiment of the present invention may be implemented by using a 4G LTE base station, a Small Cell, a Pre5G base station, or the like as a hardware execution subject.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the random access channel.

Embodiment 2

As shown in FIG. 2, the following example is used to describe a method for randomly accessing a channel in the embodiment of the present invention. In this embodiment, multiple UE scheduling is performed, and the UE is evenly distributed at a near-near midpoint. Embodiments include:

Step 201: Obtain configuration information of the PRACH and scheduling information of the PUSCH service that needs to be scheduled in the uplink UL subframe at the next moment;

Step 202: Acquire a historical SINR record of the UE corresponding to the PUSCH service.

Step 203: According to the obtained historical SINR record, determine whether the RB-level average SINR of the UE that schedules the PUSCH service is greater than the virtual detection SINR minimum threshold, and if it is greater than the virtual detection SINR minimum threshold, go to step 204; if it is less than or equal to the virtual inspection SINR The lowest threshold, proceeds to step 205;

Step 204: The UE with the SINR greater than the lowest threshold of the virtual SINR is scheduled to be located in a frequency domain far from the PRACH channel, and the scheduling process ends.

Step 205: Detecting whether the scheduling requirement is frequency-selected, and when the RB resource allocated by the PUSCH service and the RB resource configured by default on the PRACH channel must be adjacent to each other, the period is the SIB2 transmission period, if the detection is the frequency selection scheduling requirement, and when sending The RB resource allocated by the PUSCH service and the RB resource configured by default on the PRACH channel must be in the vicinity of the SIB2 transmission period, and then the process proceeds to step 206; if the detection is not the frequency selection scheduling requirement, or the RB resource allocated by the PUSCH service is transmitted and The RB resource configured by default on the PRACH channel does not necessarily need to be in the vicinity of the SIB2 transmission period, and proceeds to step 207;

Step 206: Adjust a frequency domain detection start position of the PRACH to prevent the frequency domain resource of the PRACH from being adjacent or overlapping with the frequency domain resource of the PUSCH service.

Step 207: Allocate frequency domain resources of the PUSCH service in a neighboring or overlapping position of the PRACH frequency domain resource.

According to the implementation method of the flexible scheduling provided by the embodiment of the present invention, when multiple UEs are present, and the PRACH channel resource RB needs to be used adjacently or overlapped by the PRACH, due to proximity or heavy The SINR corresponding to the PUSCH service is relatively small, and the residual PUSCH signal after the PRACH is downsampled is relatively small, so that the probability of PRACH false detection can be effectively reduced.

Embodiment 3

As shown in FIG. 3, the embodiment of the present invention further provides another method for randomly accessing a channel, including:

Step 301: Determine, according to physical random access channel (PRACH) configuration information, a first frequency domain resource allocated by the PRACH.

Step 302: Determine a third frequency domain resource scheduled by a physical uplink shared channel (PUSCH) scheduled by an uplink (UL) subframe;

Step 303, when the separation distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold, calculating a signal to noise ratio (SINR) on the RB corresponding to the third frequency domain resource;

Step 304: Compare the SINR with the preset threshold of the PRACH virtual check, and adjust the virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource according to the comparison result.

Optionally, the implementation of adjusting the virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource according to the comparison result includes:

If the SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the first frequency domain resource and the third are adjusted according to the corresponding relationship between the preset SINR level segment and the virtual check suppression threshold. The virtual detection suppression threshold of the virtual domain for the virtual domain resource; or

The SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by an N-order isosceles filter before the down-sampling of the time domain signal transmitted through the PRACH channel.

Embodiment 4

As shown in FIG. 4, the following combined example schedules a PUSCH service in a frequency domain resource adjacent to a PRACH channel in the embodiment of the present invention, and the SINR of the PUSCH service RB is less than 20 decibels (db). When the dummy check is reduced by dynamically setting the virtual check suppression relative threshold, the processing steps include:

Step 401: Obtain PRACH configuration information and PUSCH service scheduling information.

Step 402: Determine whether the PRACH channel has a neighboring or overlapping PUSCH resource allocation. The method includes: determining, according to the PRACH configuration information and the PUSCH service scheduling information, whether the neighboring RB of the PRACH channel or the used RB is allocated to the PUSCH, if the neighboring RB of the PRACH channel is used. Or the already used RB has been allocated to PUSCH use, then proceeds to step 403; if the adjacent RB of the PRACH channel and the used RB are not allocated to the PUSCH, the process proceeds to step 409;

Step 403: Calculate an SINR on a RB adjacent to or used by a PUSCH channel;

Step 404: Determine whether the calculated SINR is greater than a minimum threshold of the PRACH false check (SINR_Low) and less than a maximum threshold of the PRACH false check (SINR_Highdb), if the calculated SINR is greater than a minimum threshold of the PRACH false check and is less than the highest of the PRACH false check Threshold, then proceeds to step 406; if the calculated SINR is less than or equal to the lowest threshold of the PRACH false check; or, greater than or equal to the highest threshold of the PRACH false check, proceeds to step 405;

Step 405, if the calculated SINR is less than the lowest threshold of the PRACH false check (SINR_Low), it is considered that the PUSCH leakage signal does not affect the detection of the PRACH, and does not adjust the false check suppression threshold of the PRACH, and proceeds to step 407;

Step 406: According to the SINR, the table is configured with different detection thresholds. The method includes: querying, according to the calculated SINR, a preset relationship between a preset SINR and a threshold value of a PRACH virtual check, and obtaining a threshold value corresponding to the calculated SINR, and using the threshold value. The threshold value adjusts a PRACH false check suppression threshold;

For example, the corresponding false check suppression threshold is searched according to different SINR level segments. For example, when there is 3db PUSCH interference, the virtual detection suppression threshold is dynamically increased, and the false detection rate is reduced from 0.42% to 0.01%. Dynamic improvement means that the latest corresponding false detection suppression threshold is determined according to the latest SINR for each detection.

Step 407: Determine whether the calculated SINR is greater than the highest threshold of the PRACH false check, and the calculated SINR is greater than the highest threshold of the PRACH false check, and then proceeds to step 409; the calculated SINR is less than or equal to the highest threshold of the PRACH false check, and then Go to step 408;

Step 408, adding a primary filter before downsampling;

Add an N-order isosceles filter before the downsampling. The N-order is different according to different SINR settings. For example, if the PUSCH signal has Ydb, the 1536-point time-domain data after down-sampling the original filter is 95-order isosceles filter. The false detection rate has only dropped from 1.3% to around 0.05%. Here, setting the SINR mode according to the Nth order is a common technical means for those skilled in the art.

Step 409, PRACH detection processing.

Embodiment 5

As shown in FIG. 5, an embodiment of the present invention provides a device for randomly accessing a channel, where the device includes:

The resource location determining module 501 is configured to acquire, according to physical random access channel (PRACH) configuration information, a first location of the first frequency domain resource allocated by the PRACH;

The signal-to-noise ratio detection module 502 is configured to determine physical uplink shared channel (PUSCH) service scheduling information that needs to be scheduled in an uplink (UL) subframe at a next moment, and obtain a scheduled PUSCH service for each terminal UE according to the determined PUSCH service scheduling information. Setting historical signal to noise ratio (SINR) information within a time period before the current time, determining an average SINR value of each UE according to the obtained SINR information;

The resource configuration module 503 is configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE, where the average value of the SINR corresponding to the first UE is greater than that of the second UE. The SINR average, the distance between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than the location of the second frequency domain resource corresponding to the second UE and the first The distance between the locations.

In an optional embodiment, the resource configuration module is further configured to: when according to the frequency selection principle, a separation distance between a resource block RB position allocated for transmitting the PUSCH service and an RB position configured by default of the PRACH channel is less than a set value, and During the sending period of the system message 2 (SIB2), the location of the first frequency domain resource allocated by the PRACH is adjusted according to a preset rule, so that the second location corresponding to the second frequency domain resource and the first location are The interval value between the two is greater than the distance between the position before the second frequency domain resource and the first position.

Optionally, the device further includes:

The virtual check adjustment module is configured to determine, between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH, based on the PRACH configuration information and the PUSCH service scheduling information. The first SINR on the RB corresponding to the second frequency domain resource is calculated, and the first SINR is compared with the preset threshold of the PRACH virtual check according to the comparison result, and the first frequency domain resource and the first frequency domain are compared according to the comparison result. The two-frequency domain resource performs the virtual check suppression threshold of the virtual check to adjust.

Optionally, the virtual check adjustment module is set to:

When the first SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the first frequency domain resource is raised according to the preset relationship between the preset SINR level segment and the virtual check suppression threshold. a dummy check suppression threshold for performing a virtual check with the second frequency domain resource; or

When the first SINR is greater than the preset maximum threshold, the PRACH time domain signal is processed by the N-order isosceles filter before the down-sampling process of the signal transmitted by the PRACH.

Embodiment 6

As shown in FIG. 6, the embodiment of the present invention further provides another apparatus for randomly accessing a channel, including

The determining module 601 is configured to determine a first frequency domain resource allocated by the PRACH based on physical random access channel (PRACH) configuration information, and determine a physical uplink shared channel (PUSCH) scheduling that needs to be scheduled in an uplink (UL) subframe Triple frequency domain resources;

The detecting module 602 is configured to calculate a signal to noise ratio (SINR) on the RB corresponding to the third frequency domain resource when the separation distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold;

The adjusting module 603 is configured to compare the SINR with the preset threshold of the PRACH virtual check, and adjust the virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource according to the comparison result.

Optionally, the adjusting module 603 is configured to: when the SINR is greater than the preset minimum threshold of the PRACH virtual check and less than the preset maximum threshold, according to the preset SINR level segmentation and the virtual check suppression threshold And raising a false check suppression threshold for performing false check on the first frequency domain resource and the second frequency domain resource; or if the SINR is greater than a preset maximum threshold, before downsampling the time domain signal transmitted through the PRACH channel The PRACH time domain signal is processed by an N-order isosceles filter.

The above one or more technical solutions in the embodiments of the present application have the following technical effects:

The method and the device provided by the embodiments of the present invention, in a network scenario where multiple UEs are present, scheduling a PUSCH service with a smaller SINR than a small UE to a channel resource used by a PRACH neighbor or a PRACH, so even if a PRACH neighbor or a PRACH is used (that is, the same resource is heavy The channel resource RB used by the stacking is smaller because the SINR corresponding to the PUSCH service in the adjacent or overlapping is relatively small, and the residual PUSCH signal after the PRACH is downsampled is relatively small, so that the probability of the PRACH false check is reduced.

In addition, by dynamically adjusting the false check suppression threshold, when a scheduling scenario in which a PUSCH service is transmitted using a PRACH neighbor or a PRACH used channel resource RB occurs, the false check rate can be greatly reduced within a certain SINR range.

By adding a primary filtering process, when a scheduling scenario in which a PUSCH service is transmitted using a PRACH neighbor or a PRACH used channel resource RB occurs, after the residual PUSCH signal exceeds a certain SINR, the influence of the SINR on the PRACH detection is removed by filtering.

It is apparent that the described embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. The invention is not limited to any specific form of combination of hardware and software.

The embodiments disclosed in the present application are as described above, but the descriptions are only for the purpose of understanding the present application, and are not intended to limit the present application, such as the specific implementation method in the embodiments of the present invention. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

The above technical solution reduces the probability of false detection.

Claims

A method for randomly accessing a channel, the method comprising:

Obtaining, by using the physical random access channel PRACH configuration information, a first location of the first frequency domain resource to which the PRACH is allocated;

Determining the physical uplink shared channel PUSCH service scheduling information that needs to be scheduled in the uplink UL subframe at the next moment, and obtaining, according to the determined PUSCH service scheduling information, a history of each terminal UE that schedules the PUSCH service before the current time SNR SINR information, determining an average SINR of each UE according to the obtained SINR information;

Allocating a second frequency domain resource to each of the UEs according to the SINR average value and the first location corresponding to the UE; wherein, the SINR average value corresponding to the first UE is greater than that of the second UE The SINR average value, the distance value between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than the second frequency domain resource corresponding to the second UE The distance between the location and the first location.
The method according to claim 1, further comprising: according to a frequency selection principle, a separation distance between a resource block RB position allocated for transmitting a PUSCH service and an RB position configured by default of a PRACH channel is less than a set value, and When the system message SIB2 is sent,

And adjusting, according to a preset rule, a location of the first frequency domain resource allocated by the PRACH, such that a distance between the second location corresponding to the second frequency domain resource and the first location is greater than adjusting the second The distance between the location before the frequency domain resource and the first location.
The method of claim 1 or 2, after the assigning the second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE, the method further includes:

And determining, according to the PRACH configuration information and the PUSCH service scheduling information, that the interval between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH is less than a set threshold, calculating a second frequency domain resource corresponding The first SINR on the RB;

Comparing the first SINR with a preset threshold value of the PRACH virtual check, and adjusting the virtual check suppression threshold of the first frequency domain resource and the second frequency domain resource according to the comparison result .
The method of claim 3, wherein the adjusting the dummy check suppression threshold for performing the virtual check 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 the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the first SINR is adjusted according to the corresponding relationship between the preset SINR level segment and the virtual check suppression threshold. Determining a threshold of a virtual check for the virtual domain by the frequency domain resource and the second frequency domain resource; or

The first SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by an N-order isosceles filter before the signal downsampling process by the PRACH transmission.
A method of randomly accessing a channel, the method comprising

Determining, by the PRACH configuration information of the physical random access channel, the first frequency domain resource allocated by the PRACH;

Determining a third frequency domain resource of the physical uplink shared channel PUSCH scheduling that needs to be scheduled in the uplink UL subframe;

When the distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold, calculating a signal to noise ratio SINR on the RB corresponding to the third frequency domain resource;

The SINR is compared with a preset threshold value of the PRACH virtual check, and the virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource is falsely adjusted according to the comparison result.
The method of claim 5, wherein the adjusting the dummy check suppression threshold for performing the virtual check on the first frequency domain resource and the third frequency domain resource according to the comparison result comprises:

And the SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, and is adjusted to the first frequency domain according to a preset relationship between the preset SINR level segment and the virtual check suppression threshold. a virtual check suppression threshold for the virtual check of the resource and the third frequency domain resource; or

The SINR is greater than the preset maximum threshold, and the PRACH time domain signal is processed by an N-order isosceles filter before the time domain signal downsampling process transmitted through the PRACH channel.
A device for randomly accessing a channel, the device comprising:

a resource location determining module, configured to acquire, according to a physical random access channel PRACH configuration information, a first location of the first frequency domain resource allocated by the PRACH;

The SNR detection module is configured to determine the physical uplink shared channel PUSCH service scheduling information that needs to be scheduled in the uplink UL subframe at the next moment, and obtain the scheduled PUSCH service according to the determined PUSCH service scheduling information, and each terminal UE is set before the current time. The historical signal to noise ratio (SINR) information in the fixed time period, and determining an average value of the SINR of each UE according to the obtained SINR information;

a resource configuration module, configured to allocate a second frequency domain resource to each UE according to the SINR average value and the first location corresponding to each UE; where, the SINR average value corresponding to the first UE The value of the distance between the location of the second frequency domain resource corresponding to the first UE and the first location is greater than the value of the second UE corresponding to the second UE. The distance value between the location of the second frequency domain resource and the first location.
The apparatus according to claim 7, wherein the resource configuration module is further configured to: according to a frequency selection principle, a separation distance between a resource block RB location allocated for transmitting a PUSCH service and an RB location configured by default of a PRACH channel is less than a set value And adjusting, according to a preset rule, a location of the first frequency domain resource allocated by the PRACH according to a preset rule, so that the second location corresponding to the second frequency domain resource and the first location are The interval value between the two is greater than the distance between the position before the second frequency domain resource and the first position.
The apparatus of claim 7 or 8, the apparatus further comprising:

The virtual check adjustment module is configured to determine, according to the PRACH configuration information and the PUSCH service scheduling information, that the interval between the first frequency domain resource allocated by the PRACH and the second frequency domain resource scheduled by the PUSCH is less than a set threshold, Calculating a first SINR on the RB corresponding to the second frequency domain resource; comparing the first SINR with a preset threshold of the PRACH virtual check, and comparing the first frequency domain resource and the second frequency according to the comparison result The domain resource performs the virtual check suppression threshold of the virtual check to adjust.
The apparatus of claim 9, wherein the virtual check adjustment module is configured to:

When the first SINR is greater than the preset minimum threshold of the PRACH virtual check and is less than the preset maximum threshold, the corresponding relationship between the preset SINR level segment and the virtual check suppression threshold is increased. a virtual detection suppression threshold value of the virtual domain for the frequency domain resource and the second frequency domain resource; or

And when the first SINR is greater than the preset maximum threshold, before the downsampling process of the signal transmitted by the PRACH, the PRACH time domain signal is performed by an N-order equal-correlation filter. Reason.
A device for randomly accessing a channel, the device comprising:

a determining module, configured to determine a first frequency domain resource allocated by the PRACH based on the physical random access channel PRACH configuration information; and determine a third frequency domain resource scheduled by the physical uplink shared channel PUSCH of the uplink UL subframe;

a detecting module, configured to calculate a signal to noise ratio (SINR) on the RB corresponding to the third frequency domain resource when the distance between the first frequency domain resource and the third frequency domain resource is less than a set threshold;

The adjusting module is configured to compare the SINR with a preset threshold of the PRACH virtual check, and perform a virtual check suppression threshold of the first frequency domain resource and the third frequency domain resource according to the comparison result. The value is adjusted.
The apparatus according to claim 11, wherein the adjusting module is configured to: when the SINR is greater than a preset minimum threshold of the PRACH false check and less than a preset maximum threshold, segmentation according to a preset SINR level a virtual check suppression threshold corresponding to the virtual check suppression threshold, or a virtual check suppression threshold for performing false check on the first frequency domain resource and the third frequency domain resource; or the SINR is greater than the preset maximum threshold Then, the PRACH time domain signal is processed by an N-order isosceles filter before the down-sampling process of the time domain signal transmitted through the PRACH channel.