CN110831191A - Method and device for configuring frequency domain resources of physical random access channel - Google Patents
Method and device for configuring frequency domain resources of physical random access channel Download PDFInfo
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- CN110831191A CN110831191A CN201810913866.XA CN201810913866A CN110831191A CN 110831191 A CN110831191 A CN 110831191A CN 201810913866 A CN201810913866 A CN 201810913866A CN 110831191 A CN110831191 A CN 110831191A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
A method and a device for configuring frequency domain resources of a Physical Random Access Channel (PRACH), the method comprising: acquiring the distribution condition of at least one sub-band on the carrier bandwidth part; configuring frequency domain resource configuration information for the at least one sub-band; and configuring the frequency domain resources of the physical random access channel in the at least one sub-band in an interleaving resource allocation mode according to the frequency domain resource configuration information, wherein each frequency domain resource of the physical random access channel comprises at least one interleaving resource set; wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups. The method can provide a solution for a frequency domain resource distribution mode supporting a flexible physical random access channel, and increases available resources of a frequency domain to better adapt to a narrowband LBT scene.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and an apparatus for configuring frequency domain resources of a physical random access channel.
Background
The 3rd Generation Partnership Project (3 GPP) standards organization will study how to deploy The Fifth-Generation mobile communications (5G) New wireless (New Radio, NR) system on The unlicensed spectrum, so as to achieve The purposes of fairly and effectively utilizing The unlicensed spectrum and increasing The data transmission rate of The NR system. The NR system uses unlicensed spectrum technology, also known as New radio access unlicensed (NR-U) technology. There are three main ways of NR-U technology. A first NR cell of an unlicensed spectrum is used as a primary cell; the second is that a User Equipment (User Equipment, UE for short) accesses an unlicensed spectrum NR cell through a licensed spectrum Long Term Evolution (LTE) cell, and the third is that the UE accesses an unlicensed spectrum NR cell through a licensed spectrum NR cell. In the second and third modes, the UE and the NR base station (also referred to as the gNB) or the evolved Node B (eNB) may operate on the licensed spectrum and the unlicensed spectrum simultaneously through the carrier aggregation technology.
In the Licensed Assisted Access (LAA) technology, Listen-Before-transmit (LBT) is adopted to realize coexistence of LAA and other systems of different operators in unlicensed spectrum.
Therefore, in the 5G communication technology, a method for configuring frequency domain resources based on a Physical Random Access CHannel (PRACH) with a narrow band (bandwidth not greater than 20MHz) is needed.
Disclosure of Invention
The embodiment of the invention provides a method for configuring frequency domain resources of a physical random access channel, which comprises the following steps: acquiring the distribution condition of at least one sub-band on the carrier bandwidth part; configuring frequency domain resource configuration information for the at least one sub-band; and configuring the frequency domain resources of the physical random access channel in the at least one sub-band in an interleaving resource allocation mode according to the frequency domain resource configuration information, wherein each frequency domain resource of the physical random access channel comprises at least one interleaving resource set; wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
Optionally, the configuring, according to the frequency domain resource configuration information, the frequency domain resource of the physical random access channel in the at least one subband in an interleaving resource allocation manner includes: configuring an interleaved resource set in each frequency domain resource in an interleaved resource allocation mode; acquiring the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a sub-band and the total amount of preset physical resource blocks contained in all the frequency domain resources in the sub-band when each frequency domain resource only contains one interlaced resource set; comparing the number of the required physical resource blocks with the total number of preset physical resource blocks contained in the frequency domain resource in one sub-band; determining the number of the staggered resource sets in each frequency domain resource according to the comparison result; and configuring the frequency domain resources of the physical random access channel according to the number of the staggered resource sets in each frequency domain resource.
Optionally, the determining, according to the comparison result, the number of interleaved resource sets in each frequency domain resource includes: if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
Optionally, the frequency domain start bit of the frequency domain resource of the physical random access channel is configured to be placed in the first interleaving resource group in the sub-band.
Optionally, the resource groups with the frequency domain start bit of the frequency domain resource of the physical random access channel placed outside the first interleaving resource group in the sub-band are configured.
The embodiment of the invention provides a device for configuring frequency domain resources of a physical random access channel, which comprises the following steps: a sub-band obtaining unit, configured to obtain a distribution situation of at least one sub-band on a carrier bandwidth part; an information configuration unit, configured to configure frequency domain resource configuration information for the at least one sub-band; and a frequency domain resource allocation unit, configured to allocate, in a staggered resource allocation manner according to the frequency domain resource allocation information, frequency domain resources of a physical random access channel in the at least one subband, where each frequency domain resource of the physical random access channel includes at least one staggered resource set; wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
Optionally, the frequency domain resource configuration unit includes: an interleaved resource set allocation unit, configured to allocate an interleaved resource set in each frequency domain resource in an interleaved resource allocation manner; a data obtaining unit, configured to obtain the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a subband and the total number of preset physical resource blocks included in all frequency domain resources in a subband when each frequency domain resource only includes one interleaved resource set; a comparing unit, configured to compare the number of the required physical resource blocks with a total number of preset physical resource blocks included in all frequency domain resources in the sub-band; a determining unit, configured to determine, according to a comparison result, the number of interleaved resource sets in each frequency domain resource; and a frequency domain resource allocation subunit, configured to allocate the frequency domain resources of the physical random access channel according to the number of the interleaved resource sets in each frequency domain resource.
Optionally, the determining, according to the comparison result, the number of interleaved resource sets in each frequency domain resource includes: if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
Optionally, the frequency domain start bit of the frequency domain resource of the physical random access channel is configured to be placed in the first interleaving resource group in the sub-band.
Optionally, the resource groups with the frequency domain start bit of the frequency domain resource of the physical random access channel placed outside the first interleaving resource group in the sub-band are configured.
The embodiment of the invention provides a device for configuring frequency domain resources of a physical random access channel, which comprises a memory and a processor, wherein the memory is stored with a computer program capable of running on the processor, and the processor executes the program to realize the following steps: acquiring the distribution condition of at least one sub-band on the carrier bandwidth part; configuring frequency domain resource configuration information for the at least one sub-band; and configuring the frequency domain resources of the physical random access channel in the at least one sub-band in an interleaving resource allocation mode according to the frequency domain resource configuration information, wherein each frequency domain resource of the physical random access channel comprises at least one interleaving resource set; wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
Optionally, the configuring, according to the frequency domain resource configuration information, the frequency domain resource of the physical random access channel in the at least one subband in an interleaving resource allocation manner includes: configuring an interleaved resource set in each frequency domain resource in an interleaved resource allocation mode; acquiring the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a sub-band and the total amount of preset physical resource blocks contained in all the frequency domain resources in the sub-band when each frequency domain resource only contains one interlaced resource set; comparing the number of the required physical resource blocks with the total number of preset physical resource blocks contained in the frequency domain resource in one sub-band; determining the number of the staggered resource sets in each frequency domain resource according to the comparison result; and configuring the frequency domain resources of the physical random access channel according to the number of the staggered resource sets in each frequency domain resource.
Optionally, the determining, according to the comparison result, the number of interleaved resource sets in each frequency domain resource includes: if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
Optionally, the frequency domain start bit of the frequency domain resource of the physical random access channel is configured to be placed in the first interleaving resource group in the sub-band.
Optionally, the resource groups with the frequency domain start bit of the frequency domain resource of the physical random access channel placed outside the first interleaving resource group in the sub-band are configured.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
the embodiment of the invention provides a method for configuring frequency domain resources of a physical random access channel, which comprises the following steps: acquiring the distribution condition of at least one sub-band on the carrier bandwidth part; configuring frequency domain resource configuration information; and configuring the frequency domain resources of the physical random access channel in the at least one sub-band in an interleaving resource allocation mode according to the frequency domain resource configuration information, wherein each frequency domain resource of the physical random access channel comprises at least one interleaving resource set. In the embodiment of the invention, a solution can be provided for a frequency domain resource distribution mode supporting a flexible physical random access channel, and frequency domain available resources are increased to better adapt to a narrowband LBT (local binary transmission) scene.
Drawings
Fig. 1 is a schematic resource mapping diagram of an uplink shared channel transmitted in an unlicensed spectrum in the prior art;
fig. 2 is a schematic flowchart of a method for configuring frequency domain resources of a PRACH, according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of step S103 shown in FIG. 2;
fig. 4 to fig. 7 are schematic diagrams of configuration structures of frequency domain resources of a PRACH according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus for configuring frequency domain resources of a PRACH, according to an embodiment of the present invention; and
fig. 9 is a schematic structural diagram of an apparatus for configuring frequency domain resources of a PRACH, according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic diagram of resource mapping for transmitting an uplink shared channel in an unlicensed spectrum in the prior art.
Existing 3GPP LTE systems employ LAA technology to communicate in unlicensed spectrum. In LAA, an Uplink Shared Channel (UL-SCH) and a Physical Uplink Control Channel (PUCCH) may be transmitted in an interleaved resource allocation (interlace) manner. Referring to fig. 1, taking a 20MHz transmission bandwidth including 100 PRBs as an example, LAA configures 10 Physical Resource Blocks (PRBs) for UL-SCH resources, and at this time, the UL-SCH may be uniformly distributed in a frequency domain, for example, using PRBs with indexes 0, 10,20, … …, and 90 for transmission. The PRB 0-PRB 9 form a cluster resource group (cluster)0, and the like, the PRB 10-PRB 19 form a cluster resource group (cluster1, … …, … …), each of which contains 10 PRBs and contains the staggered resource subsets in different sets of staggered resources (for example, interlace 0-interlace 9).
The staggered resource allocation manner shown in fig. 1 is also applied to the method for configuring frequency domain resources of PRACH provided by the embodiment of the present invention.
Fig. 2 is a flowchart illustrating a method for configuring frequency domain resources of a PRACH, according to an embodiment of the present invention.
In S101, a distribution of at least one subband over a portion of a carrier bandwidth is obtained.
In a specific implementation, the higher layer signaling may inform the distribution of sub-bands (narrow bands) on the carrier. The carrier bandwidth part comprises at least one subband.
In S102, frequency domain resource configuration information is configured for the at least one sub-band.
In a specific implementation, the frequency domain resource configuration information includes: the PRB index of the frequency domain starting position pair of the PRACH in the at least one subband is N, the frequency domain resource number M, the number Q of the interleaving resource groups in one subband and the number K of the PRBs in the interleaving resource groups.
In S103, according to the frequency domain resource allocation information, a frequency domain resource of a physical random access channel is allocated in the at least one sub-band in an interleaving resource allocation manner, where each frequency domain resource of the physical random access channel includes at least one interleaving resource set.
Specifically, referring to fig. 3, fig. 3 is a flowchart illustrating an embodiment of step S103 shown in fig. 2. In a specific implementation, S103 includes S1031 to S1035.
In S1031, one interleaved resource set is configured in each frequency domain resource by way of interleaved resource allocation.
In a specific implementation, a basic unit of the frequency domain resource of each PRACH is an interleaved resource set, and PRBs included in the interleaved resource set are uniformly distributed in a frequency domain. For example, if a subband contains 100 PRBs, its index is 0-99. The index of the PRB occupied by one interleaved resource set on that subband may be 0, 10,20, 30 … …, 90. By means of staggered resource allocation, frequency domain resources of the PRACH can be uniformly distributed in a bandwidth part.
In S1032, the number of PRBs required for the frequency domain resources of the physical random access channel in one subband and the total amount of preset PRBs included in all the frequency domain resources in one subband when each frequency domain resource only includes one interleaved resource set are obtained.
TABLE 1 PRACH FREQUENCY-DOMAIN RESOURCE RETAINED PRB NUMBER TABLE
In specific implementation, referring to table 1, table 1 is a table of the number of PRBs required for PRACH frequency domain resources. May be according to the sequence length L of the PRACHRAPRACH subcarrier spacing Δ fRAAnd the subcarrier interval delta f of the bandwidth part, and the quantity of PRBs (physical resource blocks) required by acquiring the frequency domain resources of the PRACH in one subband
In addition, after a set of interleaved resources is configured in the frequency domain resource of each PRACH, the total amount of the preset PRBs included in all the frequency domain resources in one subband can be obtained.
In S1033, the number of required PRBs is compared with a total number of preset PRBs included in all frequency domain resources in the subband.
In S1034, the number of interleaved resource sets in each frequency domain resource is determined according to the comparison result.
In a specific implementation, if the number of the required PRBs is greater than the total number of preset PRBs included in all frequency domain resources in the subband, increasing the number of the configured corresponding interleaved resource sets in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
In S1035, the frequency domain resources of the physical random access channel are configured according to the number of interleaved resource sets in each frequency domain resource.
And configuring one or more interleaving resource sets in each frequency domain resource according to the number of the interleaving resource sets in each frequency domain resource.
In some embodiments, the frequency domain starting position of the frequency domain resource of the PRACH may be configured within the first interleaving resource group in the subband, or may be configured in other interleaving resource groups besides the first interleaving resource group in the subband.
Referring to fig. 4 to 7, fig. 4 to 7 are schematic configuration structures of frequency domain resources of a PRACH according to an embodiment of the present invention. The method for configuring frequency domain resources of PRACH is further described with reference to specific embodiments.
In the embodiment shown in fig. 4, the carrier bandwidth part includes a sub-band (corresponding to step S101), and the frequency domain resource configuration information of the PRACH is configured in the sub-band through a high-level signaling. That is, the PRB index N corresponding to the frequency domain starting position of the PRACH within the at least one subband, the frequency domain resource number M, the number Q of interleaved resource groups in one subband, and the number K of PRBs in the interleaved resource groups are configured through high layer signaling (corresponding to step S102).
Specifically, referring to fig. 4, a PRB index N corresponding to a frequency domain starting position of the PRACH in the subband is 1, a frequency domain resource number M is 2, a number Q of interleaving resource groups in one subband is 10, and a number K of PRBs in the interleaving resource groups is 10. It follows that the subband comprises 10 groups of interleaved resources, each group of interleaved resources comprising 10 PRBs.
In some embodiments, within one subband, one interleaved resource set is configured for each frequency domain resource of the PRACH (corresponding to S1031). Therefore, the PRB index corresponding to the first frequency domain resource is 1, 11, 21, … …, 91; the PRB index for the second frequency-domain resource is 2, 12,22, … …, 92. Referring to table 1, if the sequence length of the PRACH, the PRACH subcarrier interval, and the subcarrier interval (L) of the bandwidth part are determined according to the PRACH sequence lengthRAIs 839, Δ fRA5kHz, af is 30kHz), the number of PRBs needed to acquire the frequency domain resources of the PRACH within the one subband is 12. Meanwhile, in this embodiment, when each frequency domain resource only includes one interleaved resource set, the total amount of the preset PRBs included in all frequency domain resources in one subband is 20 (corresponding to S1032). Thus, by comparison, only one interleaved resource set (corresponding to S1033, S1034) needs to be configured in each frequency domain resource, and the number of configured interleaved resource sets (corresponding to S1035) does not need to be increased in each frequency domain resource.
In some embodiments, the frequency domain starting position of the frequency domain resource of the PRACH is located within the first set of interleaved resources in the subband (i.e., N ≦ K). Therefore, when the PRB index corresponding to the frequency domain starting position of the PRACH in one subband is N and the frequency domain resource number of the PRACH is M, the starting indexes corresponding to the frequency domain resources of the PRACH are N, N +1, N +2, … …, and N + M-1, respectively.
And configuring the frequency domain resources of the physical random access channel in the at least one sub-band in a staggered resource allocation mode according to the frequency domain resource configuration information. That is, in some embodiments, the PRB index corresponding to the first frequency domain resource of the PRACH is N, N + K, N +2K, … …, N + (Q-1) × K. The PRB index corresponding to the second frequency domain resource is N +1, N + K +1, N +2K +1, … …, N + (Q-1) × K + 1. The PRB index corresponding to the Mth frequency domain resource is N + M-1, N + K + M-1, N +2K + M-1, … …, N + (Q-J) K + M-1.
Referring to fig. 5, in the embodiment shown in fig. 5, the carrier bandwidth portion still contains only one sub-band. The difference from the embodiment shown in fig. 4 is that: the frequency domain starting position of the frequency domain resource of the PRACH is located in other interleaving resource groups (i.e., N > K) outside the first interleaving resource group in the subband.
In some embodiments, the frequency domain resource configuration information of the PRACH is configured in a sub-band by higher layer signaling. Specifically, referring to fig. 5, a PRB index N corresponding to a frequency-domain starting position of the PRACH in the subband is 11, a frequency-domain resource number M is 2, a number Q of interleaving resource groups in one subband is 10, and a number K of PRBs in the interleaving resource groups is 10. It follows that the subband comprises 10 groups of interleaved resources, each group of interleaved resources comprising 10 PRBs.
Therefore, within one subband, the PRB index corresponding to the first frequency-domain resource of the PRACH is 11, 21, 31, … …, 91; the PRB index for the second frequency-domain resource is 12,22,32, … …, 92.
As in the embodiment shown in fig. 4, in the embodiment shown in fig. 5, referring to table 1, if the number of PRBs required to acquire the frequency domain resource of the PRACH in the one subband is 12 and the total number of the preset physical resource blocks included in all the frequency domain resources in the one subband is 18 according to the PRACH format, the PRACH subcarrier spacing, and the subcarrier spacing of the bandwidth part, only one interleaved resource set needs to be configured in each frequency domain resource of the PRACH.
In some embodiments, when a PRB index corresponding to a frequency domain starting position of a PRACH within one subband is N and the number of frequency domain resources of the PRACH is M, starting indexes corresponding to the frequency domain resources of the PRACH are N, N +1, N +2, … …, and N + M-1, respectively.
In some embodiments, when the frequency-domain starting position of the frequency-domain resource of the PRACH is outside the first interleaved resource group in the subband (i.e., N > K), if the frequency-domain starting position of the frequency-domain resource of the PRACH is in the J-th interleaved resource group in the subband, the PRB index corresponding to the first frequency-domain resource of the PRACH is N, N + K, N +2K, … …, N + (Q-J) × K. The PRB index corresponding to the second frequency domain resource is N +1, N + K +1, N +2K +1, … …, N + (Q-J) × K + 1. The PRB index corresponding to the Mth frequency domain resource is N + M-1, N + K + M-1, N +2K + M-1, … …, N + (Q-J) K + M-1.
Referring to fig. 6, in the embodiment shown in fig. 6, the carrier bandwidth portion still contains only one sub-band. The difference from the embodiment shown in fig. 5 is that: within each frequency domain resource of the PRACH, more than one interleaved resource set is configured.
In some embodiments, the frequency domain resource configuration information of the PRACH is configured in a sub-band by higher layer signaling. Specifically, referring to fig. 6, a PRB index N corresponding to a frequency-domain starting position of the PRACH in the subband is 31, a frequency-domain resource number M is 1, a number Q of interleaving resource groups in one subband is 10, and a number K of PRBs in the interleaving resource groups is 10. It follows that the subband comprises 10 groups of interleaved resources, each group of interleaved resources comprising 10 PRBs.
According to the frequency domain resource allocation information, an interleaved resource set is allocated on a first frequency domain resource of the PRACH within the subband, and a PRB index corresponding to the interleaved resource set is 31, 41, 51, … …, 91.
Referring to table 1, if the number of PRBs required to acquire the frequency domain resource of the PRACH within the one subband is 12 according to the PRACH format, the PRACH subcarrier spacing, and the subcarrier spacing of the bandwidth part. Meanwhile, in this embodiment, when each frequency domain resource only includes one interleaved resource set, the total amount of the preset PRBs included in all frequency domain resources in one subband is 8. Thus, by comparison, 2 sets of interleaved resources are configured in each frequency domain resource.
And configuring the frequency domain resources of the physical random access channel according to the quantity of the staggered resource sets in each frequency domain resource. That is, the PRB index corresponding to the first frequency-domain resource of the PRACH is 31, 41, 51, … …, 91,32,42, … …, 92.
In some embodiments, when a PRB index corresponding to a frequency domain starting position of a PRACH within one subband is N and the number of frequency domain resources of the PRACH is M, starting indexes corresponding to the frequency domain resources of the PRACH are N, N +1, N +2, … …, and N + M-1, respectively.
In some embodiments, when each frequency domain resource of the PRACH includes two interleaved resource groups, if a frequency domain start position of the frequency domain resource of the PRACH is located in a J-th interleaved resource group in the subband, a PRB index corresponding to the first frequency domain resource of the PRACH is N, N + K, N +2K, … …, N + (Q-J) × K, N +1, N + K +1, N +2K +1, … …, N + (Q-J) × K + 1. The PRB indexes corresponding to the second frequency domain resource are N +2, N + K +2, N +2K +2, … …, N + (Q-J) × K +2, N +3, N + K +3, N +2K +3, … …, N + (Q-J) × K + 3. The indexes of PRBs corresponding to the Mth frequency domain resource are N +2(M-1), N + K +2(M-1), N +2K + (2M-1), … …, N + (Q-J) K +2(M-1), N +2M-1, N + K +2M-1, N +2K +2M-1, … …, N + (Q-J) K + 2M-1.
Referring to fig. 7, in the embodiment shown in fig. 7, the carrier bandwidth portion contains 2 subbands. And the high-level signaling configures the frequency domain resource of the PRACH for each sub-band.
In some embodiments, the frequency domain resource configuration information of the PRACH is configured in a sub-band by higher layer signaling. Specifically, referring to fig. 6, a PRB index N corresponding to a frequency-domain starting position of the PRACH in the first subband is 1, a frequency-domain resource number M is 1, a number Q of interleaving resource groups in each subband is 10, and a number K of PRBs in the interleaving resource groups is 10. It follows that each subband comprises 10 sets of interleaved resources, each set of interleaved resources comprising 10 PRBs.
According to the frequency domain resource allocation information, an interleaved resource set is allocated in each subband, and the PRB indexes corresponding to the interleaved resource sets in each subband are all 1, 11, 21, … …, 91.
Referring to table 1, if the number of PRBs required to acquire the frequency domain resource of the PRACH within one subband is 6 according to the PRACH format, the PRACH subcarrier spacing, and the subcarrier spacing of the bandwidth part. Meanwhile, in this embodiment, when each frequency domain resource only includes one interleaved resource set, the number of the preset PRBs included in all frequency domain resources in one subband is 10. Thus, by comparison, only one interleaved resource set is configured within each frequency domain resource, without increasing the number of configured interleaved resource sets in each frequency domain resource.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an apparatus for configuring frequency domain resources of a PRACH, according to an embodiment of the present invention. The configuration device comprises the following units.
A subband obtaining unit 21, configured to obtain a distribution of at least one subband in the carrier bandwidth part.
An information configuring unit 22, configured to configure frequency domain resource configuration information for the at least one sub-band.
A frequency domain resource allocation unit 23, configured to allocate, in a staggered resource allocation manner according to the frequency domain resource allocation information, frequency domain resources of a physical random access channel in the at least one subband, where each frequency domain resource of the physical random access channel includes at least one staggered resource set.
Wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
The frequency domain resource configuration unit 23 includes the following units.
An interleaved resource set allocation unit 231 is configured to allocate an interleaved resource set in each frequency domain resource by means of interleaved resource allocation.
A data obtaining unit 232, configured to obtain the number of physical resource blocks needed by the frequency domain resources of the physical random access channel in the subband and the total number of preset physical resource blocks included in all frequency domain resources in one subband when each frequency domain resource only includes one interleaved resource set.
A comparing unit 233, configured to compare the number of the required physical resource blocks with a total number of preset physical resource blocks included in all frequency domain resources in the sub-band.
A determining unit 234, configured to determine, according to the comparison result, the number of interleaved resource sets in each frequency domain resource.
A frequency domain resource allocation subunit 235, configured to allocate the frequency domain resources of the physical random access channel according to the number of the interleaved resource sets in each frequency domain resource.
Said determining, according to the comparison result, the number of sets of interleaved resources within each of the frequency domain resources comprises: if the number of the required PRBs is larger than the total number of the PRBs contained in all the frequency domain resources in the subband, acquiring the PRBs corresponding to more than one staggered resource set in each frequency domain resource; otherwise, only obtaining the PRB corresponding to one staggered resource set in each frequency domain resource.
In this embodiment, more contents about the operation principle and the operation mode of the configuration of the frequency domain resource of the PRACH may refer to the related descriptions in fig. 2 to fig. 7, and are not described again here.
Fig. 9 provides a configuration apparatus of an uplink time-frequency resource set according to an embodiment of the present invention, which includes a memory 91 and a processor 92, where the memory 91 stores a computer program that can be executed on the processor 92, the computer program stored on the memory 91 is a program for implementing the above method steps, and the processor 92 implements the above steps when executing the program. The memory 91 may include: ROM, RAM, magnetic or optical disks, and the like. The steps are referred to above and are not described herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. A method for configuring frequency domain resources of a Physical Random Access Channel (PRACH), comprising:
acquiring the distribution condition of at least one sub-band on the carrier bandwidth part;
configuring frequency domain resource configuration information for the at least one sub-band; and
according to the frequency domain resource allocation information, allocating frequency domain resources of a physical random access channel in the at least one sub-band in a staggered resource allocation mode, wherein each frequency domain resource of the physical random access channel comprises at least one staggered resource set;
wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
2. The method of claim 1, wherein the configuring, in the at least one sub-band, the frequency domain resources of the physical random access channel in an interleaving resource allocation manner according to the frequency domain resource configuration information comprises:
configuring an interleaved resource set in each frequency domain resource in an interleaved resource allocation mode;
acquiring the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a sub-band and the total amount of preset physical resource blocks contained in all the frequency domain resources in the sub-band when each frequency domain resource only contains one interlaced resource set;
comparing the number of the required physical resource blocks with the total number of preset physical resource blocks contained in the frequency domain resource in one sub-band;
determining the number of the staggered resource sets in each frequency domain resource according to the comparison result; and
and configuring the frequency domain resources of the physical random access channel according to the quantity of the staggered resource sets in each frequency domain resource.
3. The method of claim 2, wherein determining the number of interleaved resource sets per frequency domain resource based on the comparison comprises:
if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
4. The method of claim 1, wherein the frequency domain start bit of the frequency domain resource of the physical random access channel is configured to be located in the first interleaving resource group in the sub-band.
5. The method of claim 1, wherein the resource groups are configured with interleaving resources whose starting bits in frequency domain of physical random access channel frequency domain resources are located outside the first interleaving resource group in the sub-band.
6. An apparatus for configuring frequency domain resources of a physical random access channel, comprising:
a sub-band obtaining unit, configured to obtain a distribution situation of at least one sub-band on a carrier bandwidth part;
an information configuration unit, configured to configure frequency domain resource configuration information for the at least one sub-band; and a frequency domain resource allocation unit, configured to allocate, in a staggered resource allocation manner according to the frequency domain resource allocation information, frequency domain resources of a physical random access channel in the at least one subband, where each frequency domain resource of the physical random access channel includes at least one staggered resource set;
wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
7. The apparatus of claim 6, wherein the frequency domain resource configuration unit comprises: an interleaved resource set allocation unit, configured to allocate an interleaved resource set in each frequency domain resource in an interleaved resource allocation manner;
a data obtaining unit, configured to obtain the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a subband and the total number of preset physical resource blocks included in all frequency domain resources in a subband when each frequency domain resource only includes one interleaved resource set;
a comparing unit, configured to compare the number of the required physical resource blocks with a total number of preset physical resource blocks included in all frequency domain resources in the sub-band;
a determining unit, configured to determine, according to a comparison result, the number of interleaved resource sets in each frequency domain resource; and
and a frequency domain resource allocation subunit, configured to allocate the frequency domain resources of the physical random access channel according to the number of the interleaved resource sets in each frequency domain resource.
8. The apparatus of claim 7, wherein the determining the number of interleaved resource sets per frequency domain resource according to the comparison comprises:
if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
9. The apparatus of claim 6, wherein a frequency domain start bit of the frequency domain resource of the physical random access channel is configured to be located in a first interleaving resource group in the sub-band.
10. The apparatus of claim 6, wherein the set of interleaving resources is configured such that the frequency domain start bit of the frequency domain resource of the physical random access channel is located outside the first set of interleaving resources in the sub-band.
11. An apparatus for configuring frequency domain resources of a physical random access channel, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor when executing the program implements the steps of:
acquiring the distribution condition of at least one sub-band on the carrier bandwidth part;
configuring frequency domain resource configuration information for the at least one sub-band; and
according to the frequency domain resource allocation information, allocating frequency domain resources of a physical random access channel in the at least one sub-band in a staggered resource allocation mode, wherein each frequency domain resource of the physical random access channel comprises at least one staggered resource set;
wherein the frequency domain resource configuration information includes: the frequency domain starting position of the physical random access channel resource in the at least one sub-band, the number of frequency domain resources, the number of interleaving resource groups in one sub-band, and the number of physical resource blocks in the interleaving resource groups.
12. The apparatus of claim 11, wherein the configuring, according to the frequency domain resource configuration information, frequency domain resources of a physical random access channel in the at least one sub-band in an interleaving resource allocation manner comprises:
configuring an interleaved resource set in each frequency domain resource in an interleaved resource allocation mode;
acquiring the number of physical resource blocks needed by frequency domain resources of a physical random access channel in a sub-band and the total amount of preset physical resource blocks contained in all the frequency domain resources in the sub-band when each frequency domain resource only contains one interlaced resource set;
comparing the number of the required physical resource blocks with the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band;
determining the number of the staggered resource sets in each frequency domain resource according to the comparison result; and
and configuring the frequency domain resources of the physical random access channel according to the quantity of the staggered resource sets in each frequency domain resource.
13. The apparatus of claim 12, wherein the determining the number of interleaved resource sets per frequency domain resource based on the comparison comprises:
if the number of the required physical resource blocks is larger than the total number of preset physical resource blocks contained in all frequency domain resources in the sub-band, increasing the number of the corresponding staggered resource sets configured in each frequency domain resource; otherwise, only one interleaved resource set is configured within each frequency domain resource.
14. The apparatus of claim 11, wherein a frequency domain start bit of a frequency domain resource of a physical random access channel is configured to be located in a first set of interleaving resources in a subband.
15. The apparatus of claim 11, wherein the set of interleaving resources is configured such that the frequency domain start bit of the frequency domain resource of the physical random access channel is located outside the first set of interleaving resources in the subband.
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