CN116506964A - Method, device, equipment and medium for adjusting guard interval of full duplex sub-band - Google Patents
Method, device, equipment and medium for adjusting guard interval of full duplex sub-band Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
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- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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Abstract
The disclosure provides a sub-band full duplex protection interval adjusting method, device, equipment and medium, and relates to the technical field of communication, wherein the method comprises the following steps: judging the data transmission of an uplink sub-band in the full duplex of the guard sub-band, or the data transmission of a downlink sub-band in the full duplex of the guard sub-band, and if the data transmission of the uplink sub-band is guaranteed, determining the occupation amount of uplink sub-band resources; if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources, and adjusting the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band through the occupation amount of the uplink sub-band resources or the occupation amount of the downlink sub-band resources. The width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex sub-band can be adjusted through the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource, so that the interference on a cross link is reduced, and the data transmission efficiency and quality are ensured.
Description
Technical Field
The disclosure relates to the technical field of communication, and in particular relates to a sub-band full duplex protection interval adjusting method, device, equipment and medium.
Background
Sub-band full duplex is a novel duplex technology, which can divide an uplink sub-band and a downlink sub-band on a frequency band of a carrier wave, so that a base station has uplink resources and downlink resources at the same time on more time slots, and the time delay advantage similar to that of a frequency division duplex (Frequency Division Duplexing, FDD) system is obtained in a time division duplex (Time Division Duplexing, TDD) system.
In the full duplex technology of the sub-band, cross link interference can be generated between the uplink sub-band and the downlink sub-band, generally, a larger guard interval can be set, but in the full duplex technology of the sub-band, the guard interval between the uplink sub-band and the downlink sub-band is generally difficult to directly set, so that the spectrum utilization efficiency can be obviously reduced, and therefore, the common guard interval between the uplink sub-band and the downlink sub-band is smaller, and the cross link interference between the uplink sub-band and the downlink sub-band is serious.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure provides a sub-band full duplex protection interval adjusting method, device, equipment and medium, which at least reduce interference on a cross link to a certain extent and ensure data transmission efficiency and quality.
Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.
In a first aspect, embodiments in the present disclosure provide a guard interval adjustment method for sub-band full duplex, the method including:
judging the data transmission of an uplink sub-band in the full duplex of the guard sub-band or the data transmission of a downlink sub-band in the full duplex of the guard sub-band;
if the data transmission of the uplink sub-band is ensured, determining the occupation amount of the uplink sub-band resources;
if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources;
the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band is adjusted by the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource.
In one possible embodiment, the method further comprises:
when the difference value between the downlink resource quantity and the uplink resource quantity in the frame format is larger than a first preset value, determining to ensure the data transmission of the uplink sub-band;
and when the uplink traffic is smaller than the second preset value and the downlink traffic is larger than the third preset value, determining to ensure the data transmission of the downlink sub-band in the full duplex of the sub-band.
In a possible embodiment, the determining the uplink subband resource occupancy includes:
And determining the occupation amount of uplink sub-band resources according to the maximum frequency spectrum efficiency supported by the terminal in the uplink sub-band and the average traffic of all terminals in the uplink sub-band.
In one possible embodiment, adjusting the width of the current guard interval between the uplink and downlink sub-bands in the sub-band full duplex by the uplink sub-band resource occupancy includes:
if the occupied amount of the uplink sub-band resources is larger than or equal to the threshold value of the occupied amount of the uplink sub-band resources, the width of the current guard interval is enlarged;
if the occupation amount of the uplink sub-band resources is smaller than the occupation amount threshold value of the uplink sub-band resources and the current guard interval is larger than the guard interval threshold value, the width of the current guard interval is reduced, or the width of the current guard interval is ensured to be unchanged.
In a possible embodiment, the expanding the width of the current guard interval includes:
and selecting a first width which is adjacent to the width of the current guard interval and is larger than the width of the current guard interval from a plurality of preset width values as the width of the adjusted guard interval.
In a possible embodiment, the expanding the width of the current guard interval includes:
Measuring an uplink sub-band interference result according to a sounding reference signal added in an uplink sub-band by a terminal and a comparison reference signal with a corresponding relation with the sounding reference signal in a downlink sub-band; the uplink sub-band interference result is the result that the base station receives interference when transmitting data through the uplink sub-band; the corresponding relation is that the symbol bit of the reference signal in the downlink sub-band is symmetrical to the symbol bit of the sounding reference signal in the uplink sub-band;
adjusting a table and the uplink sub-band interference result according to the uplink sub-band interference result, and expanding the width of the current guard interval to a second width; the uplink sub-band interference result adjustment table comprises the corresponding relation between the width of the guard interval and the uplink sub-band interference results.
In a possible embodiment, the uplink subband interference results include a self-interference result and a cross-interference result;
the measuring the uplink sub-band interference result according to the sounding reference signal added in the uplink sub-band by the terminal and the contrast reference signal with the corresponding relation with the sounding reference signal in the downlink sub-band comprises:
Determining a self-interference result through the comparison reference signal; the self-interference result is the self-interference isolation attenuation degree between a transmitting antenna and a receiving antenna of the base station;
determining a first signal-to-interference-and-noise ratio according to the sounding reference signal;
comparing the first signal-to-interference-and-noise ratio with the channel state of the non-sub-band full duplex time slot to determine a cross interference result; the cross interference result is the cross interference from downlink data transmission to the uplink sub-band when the base station transmits data to the uplink sub-band;
and determining the uplink sub-band interference result according to the self-interference result and the cross-interference result.
In a possible embodiment, the expanding the width of the current guard interval to the second width according to the uplink sub-band interference result adjustment table and the uplink sub-band interference result includes:
and keeping the boundary of the uplink sub-band in the current guard interval still, and adjusting the boundary of the downlink sub-band according to the uplink sub-band interference result to expand the width of the current guard interval to a second width.
In a possible embodiment, the determining the downlink subband resource occupancy includes:
And determining the occupation amount of downlink sub-band resources according to the maximum spectrum efficiency supported by the terminal under the estimation of the downlink sub-band channel and the average traffic of all the terminals in the downlink sub-band.
In one possible embodiment, adjusting the width of the current guard interval between the uplink and downlink sub-bands in the sub-band full duplex by the downlink sub-band resource occupancy includes:
if the occupation amount of the downlink sub-band resources is larger than or equal to the occupation amount threshold value of the downlink sub-band resources, the width of the current guard interval is enlarged;
if the downlink subband resource occupation amount is smaller than the downlink subband resource occupation amount threshold value and the current guard interval is larger than the guard interval threshold value, the width of the current guard interval is reduced, or the width of the current guard interval is ensured to be unchanged.
In a possible embodiment, the expanding the width of the current guard interval includes:
determining a downlink sub-band interference result according to the cross interference reference signal added by the terminal in the downlink sub-band; the cross interference reference signal is used for measuring the condition that a downlink sub-band in a sub-band full duplex time slot is interfered; the downlink sub-band interference result is the cross interference from downlink data transmission to uplink sub-band when the base station transmits data through the downlink sub-band;
Adjusting a table and the downlink sub-band interference result according to the downlink sub-band interference result, and expanding the width of the current guard interval to a third width; the downlink sub-band interference result adjustment table comprises the corresponding relation between the width of the guard interval and the downlink sub-band interference results.
In a possible embodiment, the determining the downlink subband interference result according to the cross interference reference signal added by the terminal in the downlink subband includes:
determining a second signal-to-interference-and-noise ratio according to the cross interference reference signal;
and comparing the second signal-to-interference-and-noise ratio with the channel state of the non-sub-band full duplex time slot to determine a downlink sub-band interference result.
In a possible embodiment, the expanding the width of the current guard interval includes:
and keeping the boundary of the downlink sub-band in the current guard interval still, and adjusting the boundary of the uplink sub-band according to the downlink sub-band interference result to expand the width of the current guard interval to a third width.
In a second aspect, embodiments in the present disclosure provide a guard interval adjustment apparatus for sub-band full duplex, the apparatus comprising:
the judging unit is used for judging the data transmission of the uplink sub-band in the full duplex of the guard sub-band or the data transmission of the downlink sub-band in the full duplex of the guard sub-band;
A determining unit, configured to determine an uplink subband resource occupation amount if data transmission of an uplink subband is guaranteed;
the determining unit is further used for determining the occupation amount of downlink sub-band resources if the data transmission of the downlink sub-band is ensured;
and the adjusting unit is used for adjusting the width of the current protection interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band through the occupation amount of the uplink sub-band resources or the occupation amount of the downlink sub-band resources.
In a third aspect, an embodiment of the present disclosure provides an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the method described in the first aspect above via execution of the executable instructions.
In a fourth aspect, embodiments of the present disclosure provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method described in the first aspect above.
In a fifth aspect, according to another aspect of the present disclosure, there is also provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions are read from a computer-readable storage medium by a processor of a computer device, and executed by the processor, cause the computer device to perform the method of any of the above.
The embodiment of the disclosure provides a sub-band full duplex protection interval adjusting method, which comprises the following steps: judging the data transmission of an uplink sub-band in the full duplex of the guard sub-band or the data transmission of a downlink sub-band in the full duplex of the guard sub-band; if the data transmission of the uplink sub-band is ensured, determining the occupation amount of the uplink sub-band resources; if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources; the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band is adjusted by the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource. The width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex sub-band can be adjusted through the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource, so that the interference on a cross link is reduced, and the data transmission efficiency and quality are ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 shows a schematic diagram of a sub-band full duplex configuration in an embodiment of the present disclosure;
FIG. 2 illustrates interference between uplink and downlink in an embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a guard interval adjustment method of sub-band full duplex in an embodiment of the disclosure;
FIG. 4 is a schematic diagram of an uplink subband and downlink subband configuration in an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another uplink and downlink subband configuration in an embodiment of the present disclosure;
fig. 6 illustrates a schematic diagram of still another uplink and downlink subband configuration in an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a guard interval adjusting apparatus with full duplex sub-band in an embodiment of the present disclosure;
fig. 8 shows a schematic structural diagram of an electronic device in an embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.
In the related art, such a large guard interval is generally difficult to directly set between an uplink sub-band and a downlink sub-band in full duplex of the sub-bands, so that the spectrum utilization efficiency is significantly reduced, and the common guard interval between the uplink sub-band and the downlink sub-band in full duplex of the sub-bands is smaller, so that the cross link interference between the uplink sub-band and the downlink sub-band is serious. A schematic diagram of a sub-band full duplex configuration is shown in fig. 1, where, as shown in fig. 1, downlink resource blocks and uplink resource blocks may be placed side by side up and down; there may be a case that the uplink sub-band is included in the carrier, and there are two guard intervals, and a symmetrical design mode is adopted, that is, a downlink resource block-an uplink resource block-a downlink resource block; as shown in fig. 1, the uplink resource block may be configured on the side, where a blank portion indicates a guard interval.
The distance between the uplink sub-band and the downlink sub-band is described by the following, and for the case that the uplink is interfered by the downlink, the interference mainly comes from the self-interference of the transmitting antenna and the receiving antenna of the base station and the interference from the neighboring base station when transmitting the downlink information. As shown in fig. 2, the self-interference of the sub-band full duplex base station and the downlink interference of other base stations to the sub-band full duplex base station.
For the case that the downlink is interfered by the uplink, since the terminal generally does not have the capability of receiving and transmitting simultaneously, the interference mainly comes from the interference of an unspecified number of uplink terminals around the downlink terminal, which can be understood that the terminal a is receiving downlink information, and other terminals are sending uplink information, the terminal a may receive the uplink information sent by other terminals, so that the downlink information received by the terminal a is interfered by other terminals. The other terminals transmitting the uplink information as shown in fig. 2 interfere with the terminals receiving the downlink information.
Therefore, the embodiment of the disclosure provides a guard interval adjusting method for full duplex of a sub-band, which is used for judging whether data transmission of an uplink sub-band in full duplex of the sub-band is guaranteed or data transmission of a downlink sub-band in full duplex of the sub-band is guaranteed; if the data transmission of the uplink sub-band is ensured, determining the occupation amount of the uplink sub-band resources; if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources; the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band is adjusted by the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource. By the mode, the width of the current protection interval between the uplink sub-band and the downlink sub-band in the sub-band full duplex can be adjusted through the occupation amount of the uplink sub-band resource or the occupation amount of the downlink sub-band resource, so that the data transmission efficiency and quality are ensured, and the frequency spectrum utilization rate and the transmission reliability in the sub-band full duplex are improved.
The present exemplary embodiment will be described in detail below with reference to the accompanying drawings and examples.
Firstly, in the embodiment of the present disclosure, a method for adjusting a guard interval of full duplex sub-band is provided, and the method may be executed by any electronic device having a computing processing capability, where an electronic device is taken as an example.
Fig. 3 shows a flowchart of a subband full duplex guard interval adjustment method in an embodiment of the present disclosure, and as shown in fig. 3, the subband full duplex guard interval adjustment method provided in the embodiment of the present disclosure includes the following steps:
s302: and judging whether the data transmission of the uplink sub-band in the full duplex of the guard sub-band is ensured or the data transmission of the downlink sub-band in the full duplex of the guard sub-band is ensured.
In a possible embodiment, the data transmission efficiency and quality, and the transmission reliability can be ensured by adjusting the guard interval between the uplink sub-band and the downlink sub-band.
Based on the above, the data transmission of the uplink sub-band in the full duplex of the guard sub-band can be judged first, or the data transmission of the downlink sub-band in the full duplex of the guard sub-band needs to be judged according to the load condition.
The specific judging mode can be as follows: and when the difference value between the downlink resource quantity and the uplink resource quantity in the frame format is larger than a first preset value, determining to ensure the data transmission of the uplink sub-band. It can be understood that: when the downlink resource is far greater than the uplink resource in the frame format, the uplink subband is usually narrower at this time, and the capacity of the uplink subband generally needs to be guaranteed.
Further, when the uplink traffic is smaller than the second preset value and the downlink traffic is larger than the third preset value, determining to guarantee data transmission of the downlink sub-band in the full duplex of the sub-band. It can be understood that: when the uplink service is less and the downlink service load is heavier, the downlink sub-band resource can be preferentially ensured.
S304: and if the data transmission of the uplink sub-band is ensured, determining the occupation amount of the uplink sub-band resources.
In one possible embodiment, the uplink subband resource occupation amount may be determined according to the maximum spectrum efficiency that the terminal can support in the uplink subband and the average traffic volume of all terminals in the uplink subband.
The specific formula is as follows:
wherein U represents the occupation amount of uplink sub-band resources; y represents the average traffic of all terminals in the uplink sub-band; x is x n Indicating the maximum spectral efficiency that each terminal can support in the uplink sub-band.
S306: and if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources.
In one possible embodiment, when there is less uplink traffic and more downlink traffic load, the priority may be chosen to guarantee downlink subband resources.
The downlink sub-band resource occupation amount can be determined according to the maximum spectrum efficiency supported by the terminal under the downlink sub-band channel estimation and the average traffic of all the terminals in the downlink sub-band.
The specific formula is as follows:
wherein D represents the occupation amount of uplink sub-band resources; y' representsThe average traffic of the terminal in the downlink sub-band; x is x n ' represents the maximum spectral efficiency that each terminal can support under the downlink sub-band.
S308: the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band is adjusted by the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource.
In one possible embodiment, the specific way to adjust the width of the current guard interval between the uplink and downlink sub-bands in the full duplex of the sub-band by the uplink sub-band resource occupancy may include the following cases:
illustratively, if the uplink subband resource occupancy is greater than or equal to the uplink subband resource occupancy threshold, the width of the current guard interval is enlarged.
By S U And when the ratio of the occupied uplink sub-band resource U to the occupied uplink sub-band total resource U is larger than a certain ratio, the current guard interval width is required to be enlarged to adapt to the occupied uplink sub-band resource U.
The specific manner of expanding the width of the current guard interval may include the following:
example 1: and selecting a first width which is adjacent to the width of the current protection interval and is larger than the width of the current protection interval from a plurality of preset width values as the width of the adjusted protection interval.
When the width of the current guard interval needs to be enlarged according to the occupation amount of the uplink sub-band resources, the width of the guard interval is adjusted to a preset width adjacent to the width of the current guard interval.
Example 2: measuring an uplink sub-band interference result according to a sounding reference signal added in an uplink sub-band by a terminal and a comparison reference signal with a corresponding relation with the sounding reference signal in a downlink sub-band, wherein the corresponding relation is that a symbol position of the comparison reference signal in the downlink sub-band is symmetrical with a symbol position of the sounding reference signal in the uplink sub-band, and the width of a current guard interval is enlarged to a second width according to an uplink sub-band interference result adjustment table and the uplink sub-band interference result; the uplink sub-band interference result adjustment table includes a correspondence between the width of the guard interval and the plurality of uplink sub-band interference results.
The uplink sub-band interference result is the result that the base station receives interference when transmitting data through the uplink sub-band.
And determining how much width of the guard interval is specifically required to be adjusted according to the uplink sub-band interference result by measuring the uplink sub-band interference result, and adjusting the guard interval by an uplink sub-band interference result adjusting table, wherein the uplink sub-band interference result adjusting table can be understood as the corresponding relation between the width of the guard interval and the sub-band interference result. For example, when the guard interval is enlarged, for example, the interference level of the uplink sub-band interference result determined at present is a, the interference level is expected to be reduced to B, and the width of the guard interval corresponding to the need for enlarging can be determined.
Further, the difference A-B can be determined by the interference level A corresponding to the uplink sub-band interference result and the expected interference level B, and the width to be adjusted can be calculated specifically through the A-B.
When the guard interval needs to be enlarged, if the level of cross link interference indicated by the uplink subband interference result is not high, it is considered that the channel main influencing factor is not cross link interference between the uplink subband and the downlink subband, and the guard interval may not be enlarged or may be slightly enlarged correspondingly.
In the process of adjusting the guard interval, the maximum guard interval width may be preset, and the guard interval is adjusted anyway, generally cannot exceed the maximum value, which may be set to a guard interval width that is sufficiently safe.
The guard interval may be set in advance in steps to several optional width values, or may be set to each value of the number of minimum to maximum Resource Blocks (RBs). Specifically, how to preset the optional width value of the guard interval can be determined according to practical situations, if the adjustment accuracy is higher, the value can be set to each value from the minimum RB number to the maximum RB number, and the width value to be adjusted is calculated according to the specific uplink subband interference result.
Further, the specific way to measure the uplink subband interference result is as follows:
determining a self-interference result by comparing reference signals, wherein the self-interference result is the self-interference isolation attenuation degree between a base station transmitting antenna and a base station receiving antenna, determining a first signal-to-interference-noise ratio according to the sounding reference signals, and determining a cross-interference result by comparing the first signal-to-interference-noise ratio with the channel state of a non-sub-band full duplex time slot; the cross interference result is the cross interference from the downlink data transmission to the uplink sub-band when the base station transmits the data in the uplink sub-band, and the interference result of the uplink sub-band is determined according to the self-interference result and the cross interference result.
Fig. 4 shows a schematic diagram of a sub-band full duplex time slot configuration; the specific flow is as follows: when measuring the interference result of the uplink sub-band, the base station transmits a sounding reference signal (Sounding Reference Signal, SRS) to the base station on the uplink sub-band, and simultaneously transmits a comparison reference signal received by the base station on the corresponding symbol of the boundary of the downlink sub-band, at the moment, the resource of the downlink sub-band on the corresponding symbol should be used as far as possible, at least the resource with the same width as the uplink sub-band must be used, and if no content is to be transmitted, the comparison reference signal can be expanded.
Further, the same requirement is also made for the downlink sub-band on the other side in the case where the uplink sub-band is included in the carrier. For example, there is one downlink subband at the upper part of the uplink subband, and one downlink subband at the lower part of the uplink subband, where the uplink subband is included in the carrier, it is necessary to set sounding reference signals at both the upper and lower boundaries of the uplink subband, and set reference signals in the corresponding downlink subbands, respectively.
Since uplink subband interference generally exists self-interference between a transmitting antenna and a receiving antenna of a base station and cross interference from downlink data transmission to an uplink subband when the base station performs data transmission on the uplink subband. And in the process of measuring the uplink sub-band interference result, estimating the self-interference isolation attenuation degree from the transmitting antenna to the receiving antenna according to the strength of the reference signal when the transmitting antenna transmits the signal and the strength of the reference signal when the receiving antenna receives the signal. And then estimating a first signal-to-interference-plus-noise ratio (Signal to Interference plus Noise Ratio, SINR) at the moment according to the sounding reference signal, comparing the channel state estimated by the non-sub-band full duplex time slot to obtain a cross interference result, and finally determining an uplink sub-band interference result.
Further, in the adjusting process, the width of the current guard interval is enlarged, the boundary of the uplink sub-band in the current guard interval is kept motionless, and according to the uplink sub-band interference result, the boundary of the downlink sub-band is adjusted, and the width of the current guard interval is enlarged to the second width.
Illustratively, if the uplink subband resource occupation amount is smaller than the uplink subband resource occupation amount threshold and the current guard interval is larger than the guard interval threshold, the width of the current guard interval is reduced, or the width of the current guard interval is ensured to be unchanged.
When the occupied amount U of the uplink sub-band resource is smaller than the total resource amount S of the uplink sub-band currently set U If the current guard interval is greater than the preset guard interval threshold, it is indicated that the current guard interval has a reduced condition, specifically, whether the current downlink interference condition is reduced or not can be measured, and the current downlink sub-band resource use condition is combined to comprehensively determine to reduce the guard interval or not to adjust. The manner in which the downlink interference is specifically measured is described in detail below.
When the reduction is required, if the cross link interference level is not high or obvious, it is considered that a reduction condition can be provided, the guard interval is properly reduced, and the minimum guard interval width also needs to be set, and the guard interval cannot be adjusted to be smaller than the minimum guard interval width anyway.
In another possible embodiment, the specific way to adjust the width of the current guard interval between the uplink and downlink sub-bands in the sub-band full duplex by the downlink sub-band resource occupancy may include the following cases:
illustratively, if the downlink subband resource occupancy is greater than or equal to the downlink subband resource occupancy threshold, the width of the current guard interval is enlarged.
In D U And representing the total resource quantity of the downlink sub-band which is currently set, and when the proportion of the occupied quantity D of the downlink sub-band resource to the total resource quantity of the downlink sub-band is larger than a certain proportion, indicating that the width of the current guard interval needs to be enlarged to adapt to the occupied quantity D of the downlink sub-band resource.
The specific manner of expanding the width of the current guard interval may include:
example 1: and selecting a first width which is adjacent to the width of the current protection interval and is larger than the width of the current protection interval from a plurality of preset width values as the width of the adjusted protection interval.
The adjustment of the guard interval may be completed directly after the determination to enlarge the width of the current guard interval.
Example 2: determining a downlink sub-band interference result according to a cross interference reference signal added by the terminal in the downlink sub-band, adjusting a table and the downlink sub-band interference result according to the downlink sub-band interference result, and expanding the width of the current guard interval to a third width; the downlink sub-band interference result adjustment table includes a correspondence between the width of the guard interval and the plurality of downlink sub-band interference results.
The downlink sub-band interference result is cross interference from downlink data transmission to uplink sub-band when the base station transmits data through the downlink sub-band. The cross interference reference signal is used to measure the interference of the downlink sub-band in the sub-band full duplex time slot.
Specifically, the guard interval can be adjusted by taking the measured downlink sub-band interference result as a basis, so that the cross interference between the downlink sub-band and the uplink sub-band is reduced. In the adjusting process, the width gear can be directly set, a plurality of gears are determined to be adjusted according to the downlink sub-band interference result obtained through measurement, and each value from the minimum RB number to the maximum RB number in the guard interval can be specifically adjusted.
Further, the specific manner of measuring the downlink subband interference result is as follows:
and determining a second signal-to-interference-and-noise ratio according to the cross interference reference signal, and comparing the channel states of the non-sub-band full duplex time slot with the second signal-to-interference-and-noise ratio to determine a downlink sub-band interference result.
As shown in fig. 5, since the sub-band configuration of the sub-band full duplex is a cell-level configuration, a cross interference reference signal specific to the cell configuration is designed for measuring the interfered condition of the downlink sub-band in the sub-band full duplex time slot and reporting to the base station. The position is mainly located at one side of the guard interval in the boundary of the downlink sub-band and the guard interval, at least occupies a plurality of Resource Elements (REs) in 1 RB, the RB does not contain any information except the cross interference reference signal, and the rest REs are empty.
The cross interference reference signals may be present in all sub-band full duplex slots, either periodically configured, or triggered by downlink control information (Downlink Control Information, DCI).
After receiving the cross interference reference signal, the base station can determine a second signal-to-interference-and-noise ratio, and compare the channel states of the non-sub-band full duplex time slots to determine a downlink sub-band interference result.
Further, for the case where the uplink sub-band is included inside the carrier, i.e., downlink sub-band-uplink sub-band-downlink sub-band, there are two guard intervals. If the guard intervals are designed symmetrically, the cross interference reference signal may be set in only one of the guard intervals.
Further, in particular, if necessary and allowed by resources, the cross interference reference signals arranged at intervals can also be added in the downlink sub-band, as shown in fig. 6. The feedback of the terminal measurement can be used as the basis for the base station to adjust the downlink sub-band scheduling modulation and coding strategy (Modulation and Coding Scheme, MCS) according to the interfered condition. And the cross interference reference signal is arranged at the inner side of the downlink sub-band, and other RE resources in the occupied RB can be used for transmitting other information.
By receiving the cross interference reference signal, the channel state of the terminal at the edge of the downlink sub-band (or part of the working bandwidth) can be reflected, and the potential cross interference from the uplink sub-band is estimated.
Further, in a specific adjustment process, the boundary of the downlink sub-band in the current guard interval can be kept unchanged, and according to the downlink sub-band interference result, the boundary of the uplink sub-band is adjusted, so that the width of the current guard interval is enlarged to a third width.
For example, if the downlink subband resource occupation amount is smaller than the downlink subband resource occupation amount threshold and the current guard interval is larger than the guard interval threshold, the width of the current guard interval may be reduced, or the width of the current guard interval is ensured to be unchanged.
It should be noted that, when the carrier is wide and the uplink subband is narrow, the downlink subband is affected unevenly. If there is a complete downlink or uplink time slot of the non-subband full duplex configuration, a more accurate downlink subband interfered condition can be obtained compared with the channel state without cross link interference measured at this time.
After receiving the measurement feedback of the terminal, the base station can allocate the downlink resources close to or far from the uplink sub-band according to the channel state of the terminal, balance the performance, and determine the RB number of the extended or reduced guard interval by determining the occupation amount of the downlink sub-band resources and estimating the load condition of the downlink sub-band resources.
According to the method for adjusting the guard interval of the full duplex sub-band, whether uplink sub-band transmission or downlink sub-band transmission needs to be ensured is determined, further, comparison reference signals and detection reference signals configured under corresponding conditions are used, the sub-band interference result is determined by comparing the channel states of the sub-band and the non-sub-band full duplex time slot of the comparison reference signals, and the guard interval is adjusted based on the occupied amount of sub-band resources. On the premise of determining the subband interference result, the method can accurately determine how much width of the guard interval needs to be adjusted, accurately determine the accuracy to the resource block, further ensure the occupied amount of the subband resources to meet the transmission requirement by adjusting the guard interval, and ensure the data transmission efficiency and quality.
Based on the same inventive concept, the embodiments of the present disclosure also provide a guard interval adjusting device for full duplex sub-band, as in the following embodiments. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.
Fig. 7 is a schematic structural diagram of a full duplex sub-band guard interval adjusting apparatus according to an embodiment of the present disclosure, and as shown in fig. 7, the full duplex sub-band guard interval adjusting apparatus 70 includes: a determining unit 701, configured to determine data transmission of an uplink subband in full duplex of a guard subband, or data transmission of a downlink subband in full duplex of a guard subband; a determining unit 702, configured to determine an uplink subband resource occupation amount if data transmission of an uplink subband is guaranteed; the determining unit 702 is further configured to determine a downlink subband resource occupation amount if data transmission of a downlink subband is guaranteed; an adjusting unit 703, configured to adjust the width of the current guard interval between the uplink subband and the downlink subband in the full duplex of the subband according to the uplink subband resource occupation amount or the downlink subband resource occupation amount.
Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.
An electronic device 800 according to such an embodiment of the present disclosure is described below with reference to fig. 8. The electronic device 800 shown in fig. 8 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.
As shown in fig. 8, the electronic device 800 is embodied in the form of a general purpose computing device. Components of electronic device 800 may include, but are not limited to: the at least one processing unit 810, the at least one memory unit 820, and a bus 830 connecting the various system components, including the memory unit 820 and the processing unit 810.
Wherein the storage unit stores program code that is executable by the processing unit 810 such that the processing unit 810 performs steps according to various exemplary embodiments of the present disclosure described in the above section of the present specification. For example, the processing unit 810 may perform the steps of any of the method embodiments described above.
The storage unit 820 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 8201 and/or cache memory 8202, and may further include Read Only Memory (ROM) 8203.
Storage unit 820 may also include a program/utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
Bus 830 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
The electronic device 800 may also communicate with one or more external devices 840 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 800, and/or any device (e.g., router, modem, etc.) that enables the electronic device 800 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 850. Also, electronic device 800 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 860. As shown, network adapter 860 communicates with other modules of electronic device 800 over bus 830. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 800, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the method in the above-described embodiment.
In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure. In some possible implementations, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the "exemplary methods" section of this specification, when the program product is run on the terminal device.
More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
In this disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Alternatively, the program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
In particular implementations, the program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.
From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (16)
1. A method for adjusting guard interval of full duplex sub-band, the method comprising:
judging the data transmission of an uplink sub-band in the full duplex of the guard sub-band or the data transmission of a downlink sub-band in the full duplex of the guard sub-band;
if the data transmission of the uplink sub-band is ensured, determining the occupation amount of the uplink sub-band resources;
if the data transmission of the downlink sub-band is ensured, determining the occupation amount of the downlink sub-band resources;
the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band is adjusted by the occupied amount of the uplink sub-band resource or the occupied amount of the downlink sub-band resource.
2. The guard interval adjustment method of claim 1, further comprising:
When the difference value between the downlink resource quantity and the uplink resource quantity in the frame format is larger than a first preset value, determining to ensure the data transmission of the uplink sub-band;
and when the uplink traffic is smaller than the second preset value and the downlink traffic is larger than the third preset value, determining to ensure the data transmission of the downlink sub-band in the full duplex of the sub-band.
3. The guard interval adjustment method of claim 1, wherein the determining the uplink subband resource occupancy comprises:
and determining the occupation amount of uplink sub-band resources according to the maximum frequency spectrum efficiency supported by the terminal in the uplink sub-band and the average traffic of all terminals in the uplink sub-band.
4. The guard interval adjustment method of claim 1, wherein adjusting the width of the current guard interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band by the uplink sub-band resource occupation amount comprises:
if the occupied amount of the uplink sub-band resources is larger than or equal to the threshold value of the occupied amount of the uplink sub-band resources, the width of the current guard interval is enlarged;
if the occupation amount of the uplink sub-band resources is smaller than the occupation amount threshold value of the uplink sub-band resources and the current guard interval is larger than the guard interval threshold value, the width of the current guard interval is reduced, or the width of the current guard interval is ensured to be unchanged.
5. The guard interval adjustment method of claim 4, wherein the expanding the width of the current guard interval comprises:
and selecting a first width which is adjacent to the width of the current guard interval and is larger than the width of the current guard interval from a plurality of preset width values as the width of the adjusted guard interval.
6. The guard interval adjustment method of claim 4, wherein the expanding the width of the current guard interval comprises:
measuring an uplink sub-band interference result according to a sounding reference signal added in an uplink sub-band by a terminal and a comparison reference signal with a corresponding relation with the sounding reference signal in a downlink sub-band; the uplink sub-band interference result is the result that the base station receives interference when transmitting data through the uplink sub-band; the corresponding relation is that the symbol bit of the reference signal in the downlink sub-band is symmetrical to the symbol bit of the sounding reference signal in the uplink sub-band;
adjusting a table and the uplink sub-band interference result according to the uplink sub-band interference result, and expanding the width of the current guard interval to a second width; the uplink sub-band interference result adjustment table comprises the corresponding relation between the width of the guard interval and the uplink sub-band interference results.
7. The guard interval adjustment method of claim 6, wherein the uplink sub-band interference result comprises a self-interference result and a cross-interference result;
the measuring the uplink sub-band interference result according to the sounding reference signal added in the uplink sub-band by the terminal and the contrast reference signal with the corresponding relation with the sounding reference signal in the downlink sub-band comprises:
determining a self-interference result through the comparison reference signal; the self-interference result is the self-interference isolation attenuation degree between a transmitting antenna and a receiving antenna of the base station;
determining a first signal-to-interference-and-noise ratio according to the sounding reference signal;
comparing the first signal-to-interference-and-noise ratio with the channel state of the non-sub-band full duplex time slot to determine a cross interference result; the cross interference result is the cross interference from downlink data transmission to the uplink sub-band when the base station transmits data to the uplink sub-band;
and determining the uplink sub-band interference result according to the self-interference result and the cross-interference result.
8. The guard interval adjustment method of claim 6, wherein the expanding the width of the current guard interval to a second width according to an uplink sub-band interference result adjustment table and the uplink sub-band interference result comprises:
And keeping the boundary of the uplink sub-band in the current guard interval still, and adjusting the boundary of the downlink sub-band according to the uplink sub-band interference result to expand the width of the current guard interval to a second width.
9. The guard interval adjustment method of claim 1, wherein the determining the downlink subband resource occupancy comprises:
and determining the occupation amount of downlink sub-band resources according to the maximum spectrum efficiency supported by the terminal under the estimation of the downlink sub-band channel and the average traffic of all the terminals in the downlink sub-band.
10. The guard interval adjusting method of claim 1, wherein adjusting the width of the current guard interval between the uplink and downlink sub-bands in the full duplex of the sub-bands by the downlink sub-band resource occupation amount comprises:
if the occupation amount of the downlink sub-band resources is larger than or equal to the occupation amount threshold value of the downlink sub-band resources, the width of the current guard interval is enlarged;
if the downlink subband resource occupation amount is smaller than the downlink subband resource occupation amount threshold value and the current guard interval is larger than the guard interval threshold value, the width of the current guard interval is reduced, or the width of the current guard interval is ensured to be unchanged.
11. The guard interval adjustment method of claim 10, wherein the expanding the width of the current guard interval comprises:
determining a downlink sub-band interference result according to the cross interference reference signal added by the terminal in the downlink sub-band; the cross interference reference signal is used for measuring the condition that a downlink sub-band in a sub-band full duplex time slot is interfered; the downlink sub-band interference result is the cross interference from downlink data transmission to uplink sub-band when the base station transmits data through the downlink sub-band;
adjusting a table and the downlink sub-band interference result according to the downlink sub-band interference result, and expanding the width of the current guard interval to a third width; the downlink sub-band interference result adjustment table comprises the corresponding relation between the width of the guard interval and the downlink sub-band interference results.
12. The guard interval adjustment method of claim 1, wherein the determining the downlink subband interference result according to the cross interference reference signal added by the terminal in the downlink subband comprises:
determining a second signal-to-interference-and-noise ratio according to the cross interference reference signal;
and comparing the second signal-to-interference-and-noise ratio with the channel state of the non-sub-band full duplex time slot to determine a downlink sub-band interference result.
13. The guard interval adjustment method of claim 11, wherein the expanding the width of the current guard interval to a third width according to a downlink sub-band interference result adjustment table and the downlink sub-band interference result comprises:
and keeping the boundary of the downlink sub-band in the current guard interval still, and adjusting the boundary of the uplink sub-band according to the downlink sub-band interference result to expand the width of the current guard interval to a third width.
14. A guard interval adjustment device for full duplex sub-band, the device comprising:
the judging unit is used for judging the data transmission of the uplink sub-band in the full duplex of the guard sub-band or the data transmission of the downlink sub-band in the full duplex of the guard sub-band;
a determining unit, configured to determine an uplink subband resource occupation amount if data transmission of an uplink subband is guaranteed;
the determining unit is further used for determining the occupation amount of downlink sub-band resources if the data transmission of the downlink sub-band is ensured;
and the adjusting unit is used for adjusting the width of the current protection interval between the uplink sub-band and the downlink sub-band in the full duplex of the sub-band through the occupation amount of the uplink sub-band resources or the occupation amount of the downlink sub-band resources.
15. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the method of any one of claims 1-13 via execution of the executable instructions.
16. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any one of claims 1-13.
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