CN111417187A - Method and device for determining actual TRS frequency domain resource, storage medium and UE - Google Patents

Method and device for determining actual TRS frequency domain resource, storage medium and UE Download PDF

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CN111417187A
CN111417187A CN202010220022.4A CN202010220022A CN111417187A CN 111417187 A CN111417187 A CN 111417187A CN 202010220022 A CN202010220022 A CN 202010220022A CN 111417187 A CN111417187 A CN 111417187A
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trs
frequency domain
determining
domain resource
actual
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CN111417187B (en
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谭霞
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

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Abstract

A method and device for determining actual TRS frequency domain resources, a storage medium and UE are provided, the method comprises: receiving RRC signaling; if the RRC signaling contains indication information for configuring TRS frequency domain resources, determining whether the frequency band in which the UE is located belongs to a preset frequency band; if the frequency band where the UE is located belongs to the preset frequency band, judging whether the RRC signaling contains frequency domain overlapping indication information; if the RRC signaling contains the frequency domain overlapping indication information, determining the frequency domain resources of the N +1 sections of TRSs, and recording the section of TRS with the most frequency domain resources as a first maximum TRS; and determining the actual TRS frequency domain resources according to the first maximum TRS, and performing time-frequency offset tracking by adopting the actual TRS frequency domain resources. The invention can enhance the accuracy of time frequency offset estimation and improve the uplink and downlink performance of the UE.

Description

Method and device for determining actual TRS frequency domain resource, storage medium and UE
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining actual TRS frequency domain resources, a storage medium, and a UE.
Background
At present, the New Radio (NR) BAND (BAND)41 and the long Term Evolution (L ong Term Evolution, L TE) BAND 41/38 are partially overlapped in frequency (38.101 and 36.101), and with the development of the technology, the NR extension BAND may also share the same BAND with other modes, so that a corresponding adaptive strategy needs to be performed for each BAND.
Taking NR BAND 41 as an example, L TE BAND 41/38 cells may exist in the NR BAND 41 cell, and the TRS frequency domain configuration in the NR cell may include L TE cell signals.
In the prior art, a User Equipment (UE) needs to use a Tracking Reference Signal (TRS) to perform time-frequency offset tracking, and if there is an overlap between a frequency domain resource of the TRS and L TE, the time-frequency offset estimation is inaccurate, which affects uplink and downlink performance of the UE.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a device for determining actual TRS frequency domain resources, a storage medium and UE, and the method and the device have the opportunity of selecting only the TRS which is not overlapped with L TE for time-frequency offset tracking, so that the influence of the overlapped part of L TE and TRS is avoided, the accuracy of time-frequency offset estimation is enhanced, and the uplink and downlink performance of the UE is improved.
In order to solve the technical problem, an embodiment of the invention provides a method for determining an actual TRS frequency domain resource, which includes the steps of receiving an RRC signaling, determining whether a frequency band of a UE belongs to a preset frequency band or not if the RRC signaling contains indication information of configured TRS frequency domain resources, wherein the indication information of the configured TRS frequency domain resources is used for indicating pre-configured TRS frequency domain resources, determining whether frequency domain overlapping indication information is contained in the RRC signaling if the frequency band of the UE belongs to the preset frequency band, the frequency domain overlapping indication information is used for indicating that N L TEs are overlapped with the TRS on a frequency domain, dividing the TRS into N +1 sections, wherein N is a positive integer, determining the frequency domain resources of the N +1 sections of TRSs and recording one section of the TRSs with the largest frequency domain resources as a first largest TRS if the RRC signaling contains the frequency domain overlapping indication information, determining the actual TRS frequency domain resources according to the first largest TRS and performing biased time-frequency tracking by using the actual TRS frequency domain resources.
Optionally, determining the actual TRS frequency domain resource according to the first maximum TRS includes: if the frequency domain resource of the first maximum TRS is larger than or equal to a first preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the TRS of one section with the most frequency domain resources; and if the frequency domain resource of the first maximum TRS is smaller than a first preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is a preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
Optionally, the first preset frequency domain resource threshold is determined according to the estimation accuracy of the time frequency offset tracking.
Optionally, the determining the frequency domain resources of the N +1 segment TRS includes determining the frequency domain positions of the N L TEs according to the frequency domain information of the overlapping of the TRS and L TE, and determining the frequency domain resources of each segment TRS in the N +1 segment TRS according to the frequency domain positions of the N L TEs.
Optionally, the method for determining the actual TRS frequency domain resource further includes detecting a signal-to-noise ratio of the TRS if the RRC signaling does not include frequency domain information where the TRS overlaps with L TE, and determining that the actual TRS frequency domain resource is a preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information if the signal-to-noise ratio is smaller than a first preset signal-to-noise ratio.
Optionally, the method for determining the actual TRS frequency domain resource further includes: if the signal to noise ratio is larger than or equal to the first preset signal to noise ratio, dividing the TRS into a plurality of sections, respectively detecting the signal to noise ratio of each section of TRS, and recording the TRS larger than or equal to the second preset signal to noise ratio as a larger TRS; determining one or more sections of larger TRSs occupying the most continuous frequency domain resources, and recording as a second maximum TRS; and determining the actual TRS frequency domain resources according to the second maximum TRS.
Optionally, determining the actual TRS frequency domain resource according to the second maximum TRS includes: if the frequency domain resource of the second maximum TRS is greater than or equal to a second preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the second maximum TRS; and if the frequency domain resource of the second maximum TRS is smaller than a second preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is the preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
Optionally, the second preset frequency domain resource threshold is determined according to the estimation accuracy of the time frequency offset tracking.
Optionally, the TRS is divided into multiple segments on average; the determining one or more large TRSs occupying the most contiguous frequency domain resources comprises: if there are consecutive larger TRSs of the segment sequence number, determining the largest consecutive number of the multiple segments of the larger TRS as the second largest TRS; and if no larger TRS with continuous segment sequence numbers exists, determining any one segment TRS as the second maximum TRS.
Optionally, the preset frequency bands include an NR frequency band 1, an L TE frequency band 1, an NR frequency band 41, a L TE frequency band 41, and a L TE frequency band 38.
In order to solve the technical problem, an embodiment of the present invention provides a device for determining an actual TRS frequency domain resource, including a signaling receiving module configured to receive an RRC signaling, a preset frequency band determining module configured to determine whether a frequency band in which a UE is located belongs to a preset frequency band when the RRC signaling includes indication information of configured TRS frequency domain resources, where the indication information of configured TRS frequency domain resources is used to indicate a preconfigured TRS frequency domain resource, a frequency domain overlap indication information determining module configured to determine whether the frequency band in which the UE is located belongs to the preset frequency band, where the frequency domain overlap indication information is used to indicate that N L TEs overlap with the TRS in a frequency domain and divide the TRS into N +1 segments, where N is a positive integer, a first maximum TRS determining module configured to determine the frequency domain resources of the N +1 segments and to mark a segment of the TRS with the largest frequency domain resources as a first maximum TRS when the RRC signaling includes the indication information of frequency domain overlap, and determine that the actual TRS tracks an actual time domain resource that is biased.
To solve the above technical problem, an embodiment of the present invention provides a storage medium having stored thereon computer instructions, which when executed, perform the steps of the method for determining actual TRS frequency domain resources.
In order to solve the above technical problem, an embodiment of the present invention provides a UE, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to perform the steps of the method for determining actual TRS frequency domain resources.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, by determining that the frequency band in which the UE is located belongs to the preset frequency band, and further determining the frequency domain resources of N +1 sections of TRSs divided by N L TEs when the RRC signaling contains frequency domain overlapping indication information, and determining the actual TRS frequency domain resources according to the section of TRS with the most frequency domain resources, compared with the prior art which only directly uses the frequency domain resources configured by RRC, by adopting the scheme of the embodiment of the invention, only the TRS which is not overlapped with L TE is selected to perform time-frequency offset tracking, so that the influence of the overlapped part of L TE and TRS is avoided, the accuracy of time-frequency offset estimation is enhanced, and the uplink and downlink performance of the UE is improved.
Further, when the frequency domain resource of the first maximum TRS is set to be greater than or equal to the first preset frequency domain resource threshold, the frequency domain resource of the TRS with the section with the most frequency domain resources is used, so that the problem that the accuracy of time frequency offset estimation is too low when the time frequency offset tracking is performed by using the divided TRS with the section being too small due to the fact that the TRS is divided by L TE can be avoided.
Further, if the RRC signaling does not include frequency domain information overlapping the TRS and L TE, the configured TRS frequency domain resource information in the RRC signaling may be directly used to determine the preconfigured TRS frequency domain resource when the signal-to-noise ratio of the TRS is small, which is beneficial to improving the efficiency of determining the actual TRS frequency domain resource and reducing the operation amount by using the configured TRS frequency domain resource under the conditions of small signal-to-noise ratio and good TRS signal quality.
Further, if the RRC signaling does not include frequency domain information where TRSs overlaps L TE, when the signal-to-noise ratio of the TRS is large, the TRS is divided into multiple segments, and the signal-to-noise ratio of each segment of TRS is detected, and then the actual TRS frequency domain resource is determined according to one or more large TRSs occupying the largest continuous frequency domain resources, because the signal-to-noise ratio is often poor due to the overlapping of L TE and TRS, compared with the prior art in which only RRC-configured frequency domain resources can be used directly, by adopting the scheme of the embodiment of the present invention, only a portion of TRS with good signal-to-noise ratio is selected for time-frequency offset tracking, thereby further avoiding the influence of the overlapping portion of L TE and TRS, enhancing the accuracy of time-frequency offset estimation, and improving the uplink and downlink performance of the UE.
Further, when the frequency domain resource of the second largest TRS is set to be greater than or equal to the second preset frequency domain resource threshold, the frequency domain resource of one or more sections of larger TRS occupying the largest continuous frequency domain resource is adopted, so that the problem that the accuracy of time frequency offset estimation is too low when the frequency offset tracking is carried out by adopting one or more sections of TRS after the section due to too few frequency domain resources after the TRS is segmented can be avoided.
Further, the TRSs are averagely segmented, when larger TRSs with continuous segment numbers are adopted, the continuous number of the plurality of segments of larger TRSs is the largest, and when larger TRSs without continuous segment numbers are not adopted, any segment of TRS is determined, so that the controllability and the accuracy of TRS segmentation are improved, the accuracy of time frequency offset estimation is further enhanced, and the uplink and downlink performance of the UE is improved.
Drawings
FIG. 1 is a diagram illustrating L TE and TRS overlapping part in the prior art;
fig. 2 is a flowchart of a method for determining actual TRS frequency domain resources according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating L TE overlapping TRS according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for determining actual TRS frequency-domain resources according to an embodiment of the present invention.
Detailed Description
As mentioned above, as technology advances, the NR extension BAND may share the same BAND with other modes, so it is necessary to make a corresponding adaptive strategy for each BAND.
In the prior art, the UE needs to use the TRS for time-frequency offset tracking, and if there is an overlap between the frequency domain resource of the TRS and L TE, the time-frequency offset estimation is inaccurate, which affects uplink and downlink performance of the UE.
The inventor of the present invention finds, through research, that in the prior art, only the frequency domain Resource configured by Radio Resource Control (RRC) can be directly used, and when the time-frequency offset tracking is performed by using the TRS that overlaps with L TE, the overlapping portion of L TE and TRS has a large influence, which seriously affects the accuracy of time-frequency offset estimation.
Referring to fig. 1, fig. 1 is a schematic diagram of L TE and TRS overlapping part in the prior art.
As shown in fig. 1, N L TEs overlap M TRSs in the frequency domain, and each TRS is divided into N +1 sections.
In the embodiment of the invention, by determining that the frequency band in which the UE is located belongs to the preset frequency band, and further determining the frequency domain resources of N +1 sections of TRSs divided by N L TEs when the RRC signaling contains frequency domain overlapping indication information, and determining the actual TRS frequency domain resources according to the section of TRS with the most frequency domain resources, compared with the prior art which only directly uses the frequency domain resources configured by RRC, by adopting the scheme of the embodiment of the invention, only the TRS which is not overlapped with L TE is selected to perform time-frequency offset tracking, so that the influence of the overlapped part of L TE and TRS is avoided, the accuracy of time-frequency offset estimation is enhanced, and the uplink and downlink performance of the UE is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 2, fig. 2 is a flowchart of a method for determining actual TRS frequency domain resources according to an embodiment of the present invention. The determination method of the actual TRS frequency domain resource may include steps S21 to S25:
step S21: receiving RRC signaling;
step S22: if the RRC signaling contains indication information for configuring TRS frequency domain resources, determining whether the frequency band of the UE belongs to a preset frequency band, wherein the indication information for configuring the TRS frequency domain resources is used for indicating the preconfigured TRS frequency domain resources;
step S23, if the frequency band where the UE is located is determined to belong to a preset frequency band, judging whether the RRC signaling contains frequency domain overlapping indication information, wherein the frequency domain overlapping indication information is used for indicating that N L TEs are overlapped with the TRS on the frequency domain, and dividing the TRS into N +1 sections, wherein N is a positive integer;
step S24: if the RRC signaling contains the frequency domain overlapping indication information, determining the frequency domain resources of the N +1 sections of TRSs, and recording the section of TRS with the most frequency domain resources as a first maximum TRS;
step S25: and determining the actual TRS frequency domain resources according to the first maximum TRS, and performing time-frequency offset tracking by adopting the actual TRS frequency domain resources.
In a specific implementation of step S21, the UE may receive Radio Resource Control (RRC) signaling from the base station and determine whether to trigger the subsequent step based on the content in the RRC signaling.
In a specific implementation of step S22, if the RRC signaling includes configured TRS frequency domain resource indication information, it is determined whether a frequency band in which the UE is located belongs to a preset frequency band, where the configured TRS frequency domain resource indication information is used to indicate a preconfigured TRS frequency domain resource.
Specifically, the UE may trigger a step of determining whether a frequency band in which the UE is located belongs to a preset frequency band in response to the RRC signaling that includes indication information for configuring the TRS frequency domain resource. In other words, under the condition that the RRC signaling does not include the TRS frequency domain resource configuration indication information, the UE may not need to determine whether the frequency band in which the UE is located belongs to the preset frequency band, so as to reduce the operation resources.
The TRS frequency domain resource indication information is used to indicate a preconfigured TRS frequency domain resource, which may be a frequency domain resource preconfigured for the UE for time frequency offset estimation. For example, the frequency domain resources occupied by the entire TRS as shown in fig. 1.
It should be noted that, in the prior art, the time-frequency offset estimation can be performed only by directly using the pre-configured TRS frequency domain resources.
Further, the preset frequency bands may include an NR frequency band 1, an L TE frequency band 1, an NR frequency band 41, a L TE frequency band 41, and a L TE frequency band 38.
It should be noted that, in the above frequency bands, a problem that the TRS and L TE are overlapped to affect the accuracy of the time-frequency offset estimation easily occurs, but the embodiment of the present invention is also applicable to other frequency bands with the same or similar problem.
In the specific implementation of step S23, if the UE determines that the frequency band in which the UE is located belongs to the preset frequency band, it is determined whether the RRC signaling includes frequency domain overlapping indication information.
Wherein the frequency domain overlapping indication information is used to indicate that N L TEs overlap with the TRS in the frequency domain, and the TRS is divided into N +1 segments, where N is a positive integer.
In a specific application of the embodiments of the present invention, the RRC configuration of NR may provide L TE related information overlapping NR in RateMatchPattern L TE-CRS
Referring to fig. 3, fig. 3 is a schematic diagram of an overlapping portion of L TE and TRS in an embodiment of the present invention.
As shown in FIG. 3, N L TE overlap M TRSs in the frequency domain, and divide the TRSs into N +1 sections, in the frequency domain resources of the N +1 sections of TRSs, the frequency domain resources included in each section of TRS may not be identical, e.g., D1 > D2 > D3.
In a specific implementation of step S24, if the RRC signaling includes the frequency domain overlap indication information, the frequency domain resources of the N +1 segments of TRSs are determined, and a segment of TRS with the largest frequency domain resources is denoted as a first maximum TRS.
In a specific implementation, the frequency domain overlap indication information is used to indicate that N L TEs overlap with the TRS in a frequency domain, and the UE may determine the frequency domain resources of the N +1 sections of TRSs according to the frequency domain overlap indication information, for example, determine D1, D2, and D3 in fig. 3, and determine that D1 is the section of TRS with the most frequency domain resources, that is, the first maximum TRS.
Further, the step of determining the frequency domain resources of the N +1 segment TRS may include determining the frequency domain positions of the N L TEs according to the frequency domain information of the TRS overlapping with L TE, and determining the frequency domain resources of each segment TRS of the N +1 segment TRS according to the frequency domain positions of the N L TE.
In the embodiment of the present invention, by setting the step of determining the frequency domain positions of the N L TEs, the frequency domain resource of each segment TRS in the N +1 segments TRS can be determined more accurately.
In a specific implementation of step S25, the UE may determine the actual TRS frequency-domain resource according to the first maximum TRS, and perform time-frequency offset tracking using the actual TRS frequency-domain resource.
In a first specific implementation manner of the embodiment of the present invention, the first maximum TRS may be directly used as the actual TRS frequency domain resource, and the actual TRS frequency domain resource may be used to perform time-frequency offset tracking.
In the embodiment of the invention, by determining that the frequency band in which the UE is located belongs to the preset frequency band, and further when the RRC signaling contains the frequency domain overlapping indication information, determining the frequency domain resources of N +1 sections of TRSs divided by N L TEs, and adopting the section of TRS with the most frequency domain resources as the actual TRS frequency domain resources, compared with the prior art which only can directly use the frequency domain resources configured by the RRC, by adopting the scheme of the embodiment of the invention, the TRS which is not overlapped with L TE can be selected to perform time-frequency offset tracking, so that the influence of the overlapped part of L TE and TRS is avoided, the accuracy of time-frequency offset estimation is enhanced, and the uplink and downlink performance of the UE is improved.
In a second specific implementation manner of the embodiment of the present invention, the step of determining the actual TRS frequency domain resource according to the first maximum TRS may include: if the frequency domain resource of the first maximum TRS is larger than or equal to a first preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the TRS of one section with the most frequency domain resources; and if the frequency domain resource of the first maximum TRS is smaller than a first preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is a preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
In the embodiment of the present invention, when the frequency domain resource of the first largest TRS is set to be greater than or equal to the first preset frequency domain resource threshold, the frequency domain resource of the TRS of the section with the largest frequency domain resource is only used, so that it can be avoided that the accuracy of the time frequency offset estimation is too low when the time frequency offset tracking is performed by using the divided TRS of the section divided by L TE because the TRS is too small in size.
Further, the first preset frequency domain resource threshold may be determined according to the estimation accuracy of the time frequency offset tracking.
In a specific application of the embodiment of the present invention, the first preset frequency domain resource threshold may be an estimation accuracy according to the time frequency offset tracking, for example, represented by using a parameter TRS _ PRB _ MIN.
In a third specific implementation manner of the embodiment of the present invention, the method for determining the actual TRS frequency domain resource may further include detecting a signal-to-noise ratio of the TRS if the RRC signaling does not include frequency domain information where the TRS and L TE overlap, and determining that the actual TRS frequency domain resource is a preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information if the signal-to-noise ratio is smaller than a first preset signal-to-noise ratio.
In the embodiment of the present invention, if the RRC signaling does not include frequency domain information overlapping the TRS and L TE, the configured TRS frequency domain resource information in the RRC signaling may be directly used to determine the preconfigured TRS frequency domain resource when the signal-to-noise ratio of the TRS is small, which is beneficial to improving the efficiency of determining the actual TRS frequency domain resource and reducing the operation amount by using the configured TRS frequency domain resource under the conditions of small signal-to-noise ratio and good TRS signal quality.
Further, the method for determining the actual TRS frequency domain resource may further include: if the signal to noise ratio is larger than or equal to the first preset signal to noise ratio, dividing the TRS into a plurality of sections, respectively detecting the signal to noise ratio of each section of TRS, and recording the TRS larger than or equal to the second preset signal to noise ratio as a larger TRS; determining one or more sections of larger TRSs occupying the most continuous frequency domain resources, and recording as a second maximum TRS; and determining the actual TRS frequency domain resources according to the second maximum TRS.
In the embodiment of the present invention, if the RRC signaling does not include frequency domain information where TRSs and L TE overlap, when the signal-to-noise ratio of the TRS is large, the TRS is divided into multiple segments, and the signal-to-noise ratio of each segment of TRS is detected, and then the actual TRS frequency domain resource is determined according to one or more large TRSs occupying the largest continuous frequency domain resources, because the signal-to-noise ratio is often poor due to the overlap of L TE and TRS, compared with the prior art in which only RRC-configured frequency domain resources can be directly used, by using the scheme of the embodiment of the present invention, only a portion of TRS with better signal-to-noise ratio is selected for time-frequency offset tracking, thereby further avoiding the influence of the overlapping portion of L TE and TRS, enhancing the accuracy of time-frequency offset estimation, and improving the uplink and downlink performance of the UE.
Still further, the step of determining the actual TRS frequency domain resource according to the second maximum TRS may include: if the frequency domain resource of the second maximum TRS is greater than or equal to a second preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the second maximum TRS; and if the frequency domain resource of the second maximum TRS is smaller than a second preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is the preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
In the embodiment of the present invention, when the frequency domain resource of the second largest TRS is set to be greater than or equal to the second preset frequency domain resource threshold, the frequency domain resource of the one or more large TRSs occupying the largest continuous frequency domain resource is only used, so that the problem that the accuracy of the time frequency offset estimation is too low when the time frequency offset tracking is performed by using the one or more TRSs after the TRS is segmented due to too few frequency domain resources after the TRS is segmented can be avoided.
Further, the second preset frequency domain resource threshold is determined according to the estimation accuracy of the time frequency offset tracking.
In a specific application of the embodiment of the present invention, the second preset frequency domain resource threshold may be an estimation accuracy according to the time frequency offset tracking, for example, represented by using a parameter TRS _ PRB _ MIN.
Further, the TRS may be equally divided into a plurality of segments; the step of determining one or more large TRSs occupying the most contiguous frequency domain resources may comprise: if there are consecutive larger TRSs of the segment sequence number, determining the largest consecutive number of the multiple segments of the larger TRS as the second largest TRS; and if no larger TRS with continuous segment sequence numbers exists, determining any one segment TRS as the second maximum TRS.
In the embodiment of the invention, the TRSs are averagely segmented, when larger TRSs with continuous segment numbers are adopted, the continuous number of the plurality of segments of larger TRSs is the largest, and when larger TRSs with continuous segment numbers are not adopted, any segment of TRS is determined, which is beneficial to improving the controllability and the accuracy of TRS segmentation, thereby further enhancing the accuracy of time frequency offset estimation and improving the uplink and downlink performance of UE.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus for determining actual TRS frequency domain resources according to an embodiment of the present invention. The determining means of the actual TRS frequency domain resource may include:
a signaling receiving module, configured to receive an RRC signaling;
a preset frequency band determining module, configured to determine whether a frequency band in which the UE is located belongs to a preset frequency band when the RRC signaling includes configured TRS frequency domain resource indication information, where the configured TRS frequency domain resource indication information is used to indicate a preconfigured TRS frequency domain resource;
a frequency domain overlapping indication information determining module, configured to determine whether the RRC signaling includes the frequency domain overlapping indication information when it is determined that the frequency band where the UE is located belongs to a preset frequency band, where the frequency domain overlapping indication information is used to indicate that N L TEs overlap with the TRS in a frequency domain, and the TRS is divided into N +1 segments, where N is a positive integer;
a first maximum TRS determining module, configured to determine, when the RRC signaling includes the frequency domain overlapping indication information, a frequency domain resource of the N +1 segment TRS, and mark a segment TRS with a largest frequency domain resource as a first maximum TRS;
and the actual determining module is used for determining the actual TRS frequency domain resource according to the first maximum TRS and performing time-frequency offset tracking by adopting the actual TRS frequency domain resource.
For the principle, specific implementation and beneficial effects of the apparatus for determining actual TRS frequency domain resources, please refer to the foregoing and the related description of the method for determining actual TRS frequency domain resources shown in fig. 2, which is not repeated herein.
The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the computer instructions execute the steps of the method when running. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
Specifically, in the embodiment of the present invention, the processor may be a Central Processing Unit (CPU), and the processor may also be another general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or another programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It should also be understood that the memory in the embodiments of the present application may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory the volatile memory may be Random Access Memory (RAM), which serves as external cache memory, such as Static RAM (SRAM), Dynamic RAM (DRAM), synchronous dynamic RAM (synchronous DRAM), Synchronous DRAM (SDRAM), SDRAM L, or DDR SDRAM.
The embodiment of the present invention further provides a UE, which includes a memory and a processor, where the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the method when executing the computer instructions. The UE includes, but is not limited to, a mobile phone, a computer, a tablet computer, and other terminal devices.
In particular, a terminal in this embodiment may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a Mobile device, a user terminal, a terminal device (terminal equipment), a Wireless communication device, a user agent, or a user equipment, and the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless local loop (Wireless L cal L oop, abbreviated as W LL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device, or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network, or a terminal device in a future Public land Mobile Network (Public Network L, and Mobile MN L), and the like, and the embodiments are not limited thereto.
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 (13)

1. A method for determining actual TRS frequency domain resources is characterized by comprising the following steps:
receiving RRC signaling;
if the RRC signaling contains indication information for configuring TRS frequency domain resources, determining whether the frequency band of the UE belongs to a preset frequency band, wherein the indication information for configuring the TRS frequency domain resources is used for indicating the preconfigured TRS frequency domain resources;
if the frequency band where the UE is located belongs to the preset frequency band, judging whether frequency domain overlapping indication information is contained in the RRC signaling, wherein the frequency domain overlapping indication information is used for indicating that N L TE are overlapped with the TRS on the frequency domain, and dividing the TRS into N +1 sections, wherein N is a positive integer;
if the RRC signaling contains the frequency domain overlapping indication information, determining the frequency domain resources of the N +1 sections of TRSs, and recording the section of TRS with the most frequency domain resources as a first maximum TRS;
and determining the actual TRS frequency domain resources according to the first maximum TRS, and performing time-frequency offset tracking by adopting the actual TRS frequency domain resources.
2. The method of determining actual TRS frequency domain resources according to claim 1, wherein determining the actual TRS frequency domain resources according to the first maximum TRS comprises:
if the frequency domain resource of the first maximum TRS is larger than or equal to a first preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the TRS of one section with the most frequency domain resources;
and if the frequency domain resource of the first maximum TRS is smaller than a first preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is a preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
3. The method of determining actual TRS frequency domain resource according to claim 2, wherein the first preset frequency domain resource threshold is determined according to an estimation accuracy of the time frequency offset tracking.
4. The method of determining actual TRS frequency domain resources according to claim 1, wherein determining the frequency domain resources of the N +1 section TRS comprises:
determining frequency domain positions of the N L TEs according to the frequency domain information of the TRS overlapped with L TEs;
and determining the frequency domain resources of each TRS in the N +1 sections of TRSs according to the frequency domain positions of the N L TEs.
5. The method of determining actual TRS frequency domain resource according to claim 1, further comprising:
if the RRC signaling does not contain frequency domain information overlapping with L TE, detecting the signal-to-noise ratio of the TRS;
and if the signal-to-noise ratio is smaller than a first preset signal-to-noise ratio, determining that the actual TRS frequency domain resource is the pre-configured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
6. The method of determining actual TRS frequency domain resource according to claim 5, further comprising:
if the signal to noise ratio is larger than or equal to the first preset signal to noise ratio, dividing the TRS into a plurality of sections, respectively detecting the signal to noise ratio of each section of TRS, and recording the TRS larger than or equal to the second preset signal to noise ratio as a larger TRS;
determining one or more sections of larger TRSs occupying the most continuous frequency domain resources, and recording as a second maximum TRS;
and determining the actual TRS frequency domain resources according to the second maximum TRS.
7. The method of determining actual TRS frequency domain resources of claim 6, wherein determining the actual TRS frequency domain resources based on the second maximum TRS comprises:
if the frequency domain resource of the second maximum TRS is greater than or equal to a second preset frequency domain resource threshold value, determining that the actual TRS frequency domain resource is the frequency domain resource of the second maximum TRS;
and if the frequency domain resource of the second maximum TRS is smaller than a second preset frequency domain resource threshold, determining that the actual TRS frequency domain resource is the preconfigured TRS frequency domain resource indicated by the configured TRS frequency domain resource indication information.
8. The method of determining actual TRS frequency domain resource according to claim 7, wherein the second predetermined frequency domain resource threshold is determined according to an estimation accuracy of the time frequency offset tracking.
9. The method of determining an actual TRS frequency domain resource according to claim 6, wherein the TRS is equally divided into a plurality of segments;
the determining one or more large TRSs occupying the most contiguous frequency domain resources comprises:
if there are consecutive larger TRSs of the segment sequence number, determining the largest consecutive number of the multiple segments of the larger TRS as the second largest TRS;
and if no larger TRS with continuous segment sequence numbers exists, determining any one segment TRS as the second maximum TRS.
10. The method of determining actual TRS frequency domain resources of claim 1, wherein the predetermined bands include NR band 1, L TE band 1, NR band 41, L TE band 41, and L TE band 38.
11. An apparatus for determining actual TRS frequency domain resources, comprising:
a signaling receiving module, configured to receive an RRC signaling;
a preset frequency band determining module, configured to determine whether a frequency band in which the UE is located belongs to a preset frequency band when the RRC signaling includes configured TRS frequency domain resource indication information, where the configured TRS frequency domain resource indication information is used to indicate a preconfigured TRS frequency domain resource;
a frequency domain overlapping indication information determining module, configured to determine whether the RRC signaling includes the frequency domain overlapping indication information when it is determined that the frequency band where the UE is located belongs to a preset frequency band, where the frequency domain overlapping indication information is used to indicate that N L TEs overlap with the TRS in a frequency domain, and the TRS is divided into N +1 segments, where N is a positive integer;
a first maximum TRS determining module, configured to determine, when the RRC signaling includes the frequency domain overlapping indication information, a frequency domain resource of the N +1 segment TRS, and mark a segment TRS with a largest frequency domain resource as a first maximum TRS;
and the actual determining module is used for determining the actual TRS frequency domain resource according to the first maximum TRS and performing time-frequency offset tracking by adopting the actual TRS frequency domain resource.
12. A storage medium having stored thereon computer instructions, wherein the computer instructions are operable to perform the steps of the method for determining actual TRS frequency domain resources of any one of claims 1 to 10.
13. A UE comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the method for determining actual TRS frequency domain resources of any one of claims 1 to 10.
CN202010220022.4A 2020-03-25 2020-03-25 Method and device for determining actual TRS frequency domain resource, storage medium and UE Active CN111417187B (en)

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