CN108712780B - Method and device for selecting and determining downlink occupation indication granularity - Google Patents
Method and device for selecting and determining downlink occupation indication granularity Download PDFInfo
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- CN108712780B CN108712780B CN201810460267.7A CN201810460267A CN108712780B CN 108712780 B CN108712780 B CN 108712780B CN 201810460267 A CN201810460267 A CN 201810460267A CN 108712780 B CN108712780 B CN 108712780B
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- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention provides a method and a device for selecting downlink occupancy indication granularity, a method and a device for determining the downlink occupancy indication granularity and communication equipment. The method for selecting the downlink occupation indication granularity comprises the following steps: acquiring preset information of an occupation indication and confirming a bit number contained in the occupation indication; calculating the time domain symbol number required to be indicated by the occupation indication according to preset information; and selecting the indication granularity of the occupation indication according to the bit number and the time domain symbol number. The method of the invention can realize reasonable selection of the occupation indication, thereby more effectively utilizing the downlink control information resource, reducing the probability of the false alarm indication and improving the performance of the system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a device for selecting a downlink occupancy indication granularity, a method and a device for determining the downlink occupancy indication granularity, and a communication device.
Background
Currently, development work of a 5 th generation mobile communication system (5G) is actively underway. According to future application requirements, the 5G system needs to support multiple service scenarios, wherein communication scenarios of Ultra-high reliable and Ultra-Low Latency (URLLC) such as unmanned driving, industrial automation, and the like are receiving wide attention. Generally, URLLC data has extremely high burstiness and high requirement on delay, so that the data has extremely high resource scheduling priority. The solution proposed at present for the transmission of URLLC data is: when the URLLC data arrives, the 5G base station immediately schedules the URLLC data, that is, performs puncturing transmission in an enhanced Mobile Broadband (eMBB) data block in which resource allocation has been completed, so as to realize the fastest data transfer, and further meet the requirement of the URLLC data on time delay.
However, the punctured URLLC data will affect demodulation of the eMBB data at the User Equipment (UE). To improve this problem, researchers have proposed that eMBB UEs may be provided with information related to URLLC data in received data, such as the location of URLLC data, by setting a Preemption Indication (PI), and UEs may remove URLLC data based on the information provided by the PI to improve the dataThe demodulation success rate of (c). The relevant properties of PI are defined in the current standard, for example, PI includes 14 bits, where the 14 bits are used to indicate a certain time-frequency resource region, and indicate that the granularity (ts38.213int-TF-unit) is currently selected from {0, 14} and {1,7} according to the difference between the time-domain granularity and the frequency-domain granularity, as shown in fig. 1, when the configuration of {0, 14} is adopted, the 14 bits of PI are all used to indicate symbols in the time domain, i.e., the region to be indicated is divided into 14 parts in the time domain, and the frequency domain defaults to be the whole BWP (bandwidth part); when the time-frequency resource region to be indicated is not changed, but the configuration of {1,7} is adopted, as shown in fig. 2, the region to be indicated is divided into 7 parts in time domain (each part includes 2 OFDM symbols at this time), and then the region to be indicated is divided into 2 parts in frequency domain, where 14 bits of PI correspond to 14 parts in time-frequency resource. In addition, currently PI supports cross-Carrier scheduling, i.e., PI received by UE on a certain CC (Component Carrier, carrier unit) can be used to indicate URLLC occupancy on another CC, and there may be different SCS (sub-Carrier Spacing) configurations between the CC used for PI transmission and the CC indicated by PI. Since the current standard does not configure μ (SCS configuration of cell indicated by PI) and μ INT (SCS configuration of cell in which PI is located) values are defined (mu and mu are defined in 38.211) INT Is taken from {0,1,2,3,4 }). As shown in FIG. 3, when μ =0 (15 KHz SCS), μ INT 1 (30 KHz SCS), PI period is 1 slot, and PI chooses a 0, 14 time-frequency indication granularity configuration, 14 bits in PI will only be used for 7 symbols
In this case, the redundancy of the indication becomes too large, and DCI (Downlink Control Information) resources are wasted.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an aspect of the present invention is to provide a method for selecting a granularity of downlink occupancy indication.
Another aspect of the present invention is to provide a device for selecting granularity of downlink occupancy indication.
Still another aspect of the present invention is to provide a method for determining granularity of downlink occupancy indication.
Still another aspect of the present invention is to provide an apparatus for determining granularity of downlink occupancy indication.
Yet another aspect of the present invention is to provide a communication device.
In view of this, according to an aspect of the present invention, a method for selecting a granularity of downlink occupancy indication is provided, where the method is used in a base station, and includes: acquiring preset information of an occupation indication and confirming a bit number contained in the occupation indication; calculating the time domain symbol number required to be indicated by the occupation indication according to preset information; and selecting the indication granularity of the occupation indication according to the bit number and the time domain symbol number.
The invention provides a method for selecting the granularity of downlink occupation indication.A base station reads the preset information of the configured occupation indication and confirms the bit number contained in the occupation indication. Further, the number of time-Frequency symbols required to be indicated by the occupation indication is calculated according to the preset information, wherein the time-Frequency symbols are OFDM (Orthogonal Frequency Division Multiplexing) symbols. Comparing the number of bits with the number of symbols in the time domain, thereby selecting the indication granularity of the occupancy indication according to the comparison result. The method of the invention can realize reasonable selection of the occupation indication, thereby more effectively utilizing DCI resources, reducing the probability of false alarm indication and improving the performance of the system.
The method for selecting the downlink occupancy indication granularity according to the present invention may further have the following technical features:
in the above technical solution, preferably, the step of selecting the indication granularity of the occupation indication according to the number of bits and the number of symbols in the time domain specifically includes: comparing the number of bits with the number of time domain symbols; when the bit number is larger than the time domain symbol number, selecting a first indication granularity as an indication granularity of the occupation indication; and when the bit number is less than or equal to the time domain symbol number, selecting the second indication granularity as the indication granularity of the occupation indication.
In the technical scheme, when the bit number is greater than the time domain symbol number, a first indication granularity is selected as the indication granularity of the occupation indication, wherein the first indication granularity is {1,7}, namely, a region required to be indicated by the occupation indication is divided into 7 blocks from the time domain, and a region required to be indicated is divided into 2 blocks from the frequency domain. When the bit number is less than or equal to the number of symbols in the time domain, selecting a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is a configuration of {0, 14}, and 14 bits of the occupation indication are all used for indicating symbols in the time domain, i.e. the region required to be indicated is divided into 14 blocks in the time domain, and the frequency domain defaults to the whole BWP, thereby realizing reasonable selection of the occupation indication.
In any of the above technical solutions, preferably, the method further includes: configuring occupation indication according to indication granularity; and sending the occupation indication to the terminal.
In the technical scheme, the base station configures the occupation indication according to the selected indication granularity and sends the occupation indication to the terminal, so that related information of URLLC data in the received data is provided for the eMBB terminal, and the demodulation success rate of the data is improved.
In any of the above technical solutions, preferably, the preset information includes: the allocation method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this technical solution, the preset information includes, but is not limited to, the information, and the adjustment of the indication granularity is performed through the information, so that the DCI resource can be more effectively utilized, and the probability of the occurrence of the false alarm indication is reduced. It should be noted that the carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
According to another aspect of the present invention, an apparatus for selecting granularity of downlink occupancy indication is provided, where the apparatus is used for a base station, and the apparatus includes: the information acquisition module is used for acquiring preset information of the occupation indication and confirming the bit number contained in the occupation indication; the calculation module is used for calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information; and the selection module is used for selecting the indication granularity of the occupation indication according to the bit number and the time domain symbol number.
The invention provides a device for selecting the granularity of downlink occupation indication.A base station reads preset information of configured occupation indication and confirms the bit number contained in the occupation indication. Further, the number of time-frequency symbols required to be indicated by the occupation indication is calculated according to the preset information, wherein the time-frequency symbols are OFDM symbols. Comparing the number of bits with the number of symbols in the time domain, thereby selecting the indication granularity of the occupancy indication according to the comparison result. The method of the invention can realize reasonable selection of the occupation indication, thereby more effectively utilizing DCI resources, reducing the probability of false alarm indication and improving the performance of the system.
The apparatus for selecting granularity of downlink occupancy indication according to the present invention may further have the following technical features:
in the above technical solution, preferably, the selection module includes: the comparison module is used for comparing the bit number with the time domain symbol number; the selection module is specifically configured to select the first indication granularity as an indication granularity of the occupancy indication when the number of bits is greater than the time-domain symbol number; and when the bit number is less than or equal to the time domain symbol number, selecting the second indication granularity as the indication granularity of the occupation indication.
In the technical scheme, when the bit number is larger than the time domain symbol number, a first indication granularity is selected as the indication granularity of the occupation indication, wherein the first indication granularity is {1,7}, namely, a region required to be indicated by the occupation indication is divided into 7 blocks from the time domain, and a region required to be indicated is divided into 2 blocks from the frequency domain. When the bit number is less than or equal to the number of symbols in the time domain, selecting a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is a configuration of {0, 14}, and 14 bits of the occupation indication are all used for indicating symbols in the time domain, i.e. the region required to be indicated is divided into 14 blocks in the time domain, and the frequency domain defaults to the whole BWP, thereby realizing reasonable selection of the occupation indication.
In any of the above technical solutions, preferably, the method further includes: a configuration module, configured to configure an occupation indication according to an indication granularity; and the sending module is used for sending the occupation indication to the terminal.
In the technical scheme, the base station configures the occupation indication according to the selected indication granularity and sends the occupation indication to the terminal, so that the eMBB terminal is provided with the related information of the URLLC data in the received data, and the data demodulation success rate is improved.
In any of the above technical solutions, preferably, the preset information includes: the allocation method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this technical solution, the preset information includes, but is not limited to, the information, and the adjustment of the indication granularity is performed through the information, so that the DCI resource can be more effectively utilized, and the probability of occurrence of the false alarm indication is reduced. It should be noted that the carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
According to another aspect of the present invention, a method for determining a granularity of a downlink occupancy indication is provided, where the method is used for a terminal, and includes: acquiring preset information of the occupation indication and confirming the bit number contained in the occupation indication; calculating the time domain symbol number required to be indicated by the occupation indication according to preset information; and determining the indication granularity of the occupation indication according to the bit number and the time domain symbol number.
The method for determining the granularity of the downlink occupation indication provided by the invention has the advantages that the terminal obtains the preset information of the occupation indication and confirms the bit number contained in the occupation indication. And further, calculating the time domain symbol number required to be indicated by the occupation indication according to preset information, wherein the time frequency symbol is an OFDM symbol. And comparing the bit number with the time domain symbol number so as to determine the indication granularity of the occupation indication selected by the base station according to the comparison result. The method of the invention can more effectively utilize DCI resources, reduce the probability of false alarm indication and improve the performance of the system.
The method for determining the downlink occupancy indication granularity according to the present invention may further have the following technical features:
in the foregoing technical solution, preferably, the step of determining the indication granularity of the occupancy indication according to the number of bits and the number of symbols in the time domain specifically includes: comparing the number of bits with the number of time domain symbols; when the bit number is larger than the time domain symbol number, determining the indication granularity of the occupation indication as a first indication granularity; and when the bit number is less than or equal to the time domain symbol number, determining the indication granularity of the occupation indication to be a second indication granularity.
In the technical scheme, when the bit number is greater than the time domain symbol number, a first indication granularity is determined as the indication granularity of the occupation indication, wherein the first indication granularity is {1,7}, namely, a region required to be indicated by the occupation indication is divided into 7 blocks from the time domain, and a region required to be indicated is divided into 2 blocks from the frequency domain. And when the bit number is less than or equal to the time domain symbol number, determining a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is {0, 14}, namely, the region required to be indicated is divided into 14 blocks from the time domain, and the default is the whole BWP on the frequency domain, thereby realizing reasonable determination of the occupation indication.
In any of the above technical solutions, preferably, the method further includes: receiving and demodulating an occupancy indication; and according to the indication granularity, allocating and corresponding the bits contained in the occupation indication to the time-frequency resources required to be indicated by the occupation indication.
In the technical scheme, after receiving the demodulation occupation indication, the bits in the occupation indication correspond to the time-frequency resources required by the occupation indication according to the determined indication granularity. For example, when the indication granularity configuration is determined to be {0, 14}, and the occupation indication needs to indicate 14 symbols, the time-frequency resource indicated by one bit is: one symbol in the time domain and the entire BWP in the frequency domain.
In any of the above technical solutions, preferably, the preset information includes: the method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this technical solution, the preset information includes, but is not limited to, the information, and the adjustment of the indication granularity is performed through the information, so that the DCI resource can be more effectively utilized, and the probability of occurrence of the false alarm indication is reduced. The carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
According to another aspect of the present invention, an apparatus for determining granularity of downlink occupancy indication is provided, where the apparatus is used for a terminal, and includes: the information acquisition module is used for acquiring preset information of the occupation indication and confirming the bit number contained in the occupation indication; the calculation module is used for calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information; and the determining module is used for determining the indication granularity of the occupation indication according to the bit number and the time domain symbol number.
The device for determining the granularity of the downlink occupation indication obtains the preset information of the occupation indication by the terminal and confirms the bit number contained in the occupation indication. And further, calculating the time domain symbol number required to be indicated by the occupation indication according to preset information, wherein the time frequency symbol is an OFDM symbol. And comparing the bit number with the time domain symbol number so as to determine the indication granularity of the occupation indication selected by the base station according to the comparison result. The method of the invention can more effectively utilize DCI resources, reduce the probability of false alarm indication and improve the performance of the system.
The apparatus for determining granularity of downlink occupancy indication according to the present invention may further have the following technical features:
in the foregoing technical solution, preferably, the determining module includes: the comparison module is used for comparing the bit number with the time domain symbol number; the determining module is specifically configured to determine, when the number of bits is greater than the time-domain symbol number, that the indication granularity of the occupancy indication is a first indication granularity; and when the bit number is less than or equal to the time domain symbol number, determining the indication granularity of the occupation indication to be a second indication granularity.
In the technical scheme, when the bit number is greater than the time domain symbol number, a first indication granularity is determined as the indication granularity of the occupation indication, wherein the first indication granularity is {1,7}, namely, a region required to be indicated by the occupation indication is divided into 7 blocks from the time domain, and a region required to be indicated is divided into 2 blocks from the frequency domain. And when the bit number is less than or equal to the symbol number of the time domain, determining a second indication granularity as the indication granularity of the occupancy indication, wherein the second indication granularity is a configuration of {0, 14}, namely, a region required to be indicated is divided into 14 blocks from the time domain, and the frequency domain is defaulted to the whole BWP, so that reasonable determination of the occupancy indication is realized.
In any of the above technical solutions, preferably, the method further includes: the receiving and demodulating module is used for receiving and demodulating the occupation indication; and the allocation module is used for allocating the bits contained in the occupation indication according to the indication granularity and corresponding to the time-frequency resources required by the occupation indication.
In the technical scheme, after receiving the demodulation occupation indication, the bits in the occupation indication correspond to the time-frequency resources required by the occupation indication according to the determined indication granularity. For example, when the indication granularity configuration is determined to be {0, 14}, and the occupation indication needs to indicate 14 symbols, the time-frequency resource indicated by one bit is: one symbol in the time domain and the entire BWP in the frequency domain.
In any of the above technical solutions, preferably, the preset information includes: the method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this technical solution, the preset information includes, but is not limited to, the information, and the adjustment of the indication granularity is performed through the information, so that the DCI resource can be more effectively utilized, and the probability of the occurrence of the false alarm indication is reduced. The carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
According to another aspect of the present invention, a communication device is provided, which includes the selection apparatus of the granularity of downlink occupancy indication in any of the above; or any one of the above-mentioned determining means of the granularity of downlink occupancy indication.
The communication device provided by the present invention includes the apparatus for determining the granularity of downlink occupancy indication according to any of the above technical solutions, and therefore the computer device includes all the beneficial effects of the apparatus for determining the granularity of downlink occupancy indication according to any of the above technical solutions.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a diagram showing {0, 14} indication granularity in the related art;
FIG. 2 is a diagram showing {1,7} indication granularity in the related art;
fig. 3 is a diagram showing cross-carrier redundancy indication in the related art;
fig. 4 is a flowchart illustrating a method for selecting a granularity of downlink occupancy indication according to an embodiment of the present invention;
FIG. 5 is a flow chart illustrating a method for selecting granularity of downlink occupancy indications in accordance with another embodiment of the present invention;
fig. 6 is a schematic block diagram of a device for selecting granularity of downlink occupancy indication according to an embodiment of the present invention;
FIG. 7 is a schematic block diagram of a selection apparatus for downstream occupancy indication granularity of another embodiment of the present invention;
fig. 8 is a flowchart illustrating a method for determining a granularity of downlink occupancy indication according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating a method for determining a granularity of downlink occupancy indication according to another embodiment of the present invention;
fig. 10 is a schematic block diagram of a device for determining granularity of downlink occupancy indication according to an embodiment of the present invention;
fig. 11 is a schematic block diagram of a device for determining granularity of downlink occupancy indication according to another embodiment of the present invention;
fig. 12 shows a schematic diagram of granularity adaptive adjustment of a specific embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An embodiment of the first aspect of the present invention provides a method for selecting a downlink occupancy indication granularity, where the method is used for a base station, and fig. 4 illustrates a flowchart of the method for selecting the downlink occupancy indication granularity according to an embodiment of the present invention. Wherein, the method comprises the following steps:
The invention provides a method for selecting the granularity of downlink occupation indication.A base station reads preset information of configured occupation indication and confirms the bit number contained in the occupation indication. Further, the number of time-Frequency symbols required to be indicated by the occupation indication is calculated according to the preset information, wherein the time-Frequency symbols are OFDM (Orthogonal Frequency Division Multiplexing) symbols. Comparing the number of bits with the number of time domain symbols, thereby selecting an indication granularity of the occupancy indication according to the comparison result. The method of the invention can realize reasonable selection of the occupation indication, thereby more effectively utilizing DCI resources, reducing the probability of false alarm indication and improving the performance of the system.
Fig. 5 is a flowchart illustrating a method for selecting a granularity of downlink occupancy indication according to another embodiment of the present invention. Wherein, the method comprises the following steps:
step 510, when the number of bits is less than or equal to the number of time domain symbols, selecting a second indication granularity as an indication granularity of the occupation indication;
In this embodiment, a first indication granularity is selected as the indication granularity of the occupancy indication when the number of bits is greater than the number of symbols in the time domain, where the first indication granularity is a {1,7} configuration, that is, the region required to indicate the occupancy indication is divided into 7 blocks in the time domain, and the region required to indicate is divided into 2 blocks in the frequency domain. When the number of bits is less than or equal to the number of symbols in the time domain, selecting a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is a configuration of {0, 14}, and 14 bits of the occupation indication are all used for indicating symbols in the time domain, i.e. the region to be indicated is divided into 14 blocks in the time domain, and the default is the whole BWP in the frequency domain, thereby realizing reasonable selection of the occupation indication.
And the base station configures the occupation indication according to the selected indication granularity and sends the occupation indication to the terminal, so that the eMBB terminal is provided with the related information of the URLLC data in the received data, and the demodulation success rate of the data is improved.
Preferably, the preset information includes: the allocation method comprises the following steps of occupying the interval configuration of the sub-carrier of the carrier unit where the indication is located, occupying the interval configuration of the sub-carrier of the carrier unit required to be indicated by the indication, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this embodiment, the preset information includes, but is not limited to, the above information, and the adjustment of the indication granularity is performed through the above information, so that DCI resources can be more effectively utilized, and the probability of occurrence of false alarm indication is reduced. The carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
It should be further noted that, after configuring the occupancy indication granularity, the base station does not need to send a signaling to notify the terminal that the configured indication granularity changes, and the terminal can determine the indication granularity through the information.
Fig. 6 is a schematic block diagram illustrating a device 600 for selecting a granularity of downlink occupancy indication according to an embodiment of the present invention. Wherein the apparatus 600 comprises:
an information obtaining module 602, configured to obtain preset information of the occupation indication and determine a bit number included in the occupation indication; a calculating module 604, configured to calculate, according to preset information, a time domain symbol number required to be indicated by the occupancy indication; a selecting module 606, configured to select an indication granularity of the occupancy indication according to the bit number and the time-domain symbol number.
The invention provides a device 600 for selecting the granularity of downlink occupation indication, which is used for a base station to read the preset information of the configured occupation indication and confirm the bit number contained in the occupation indication. Further, the number of time-frequency symbols required to be indicated by the occupation indication is calculated according to the preset information, wherein the time-frequency symbols are OFDM symbols. Comparing the number of bits with the number of symbols in the time domain, thereby selecting the indication granularity of the occupancy indication according to the comparison result. The method of the invention can realize reasonable selection of the occupation indication, thereby more effectively utilizing DCI resources, reducing the probability of false alarm indication and improving the performance of the system.
Fig. 7 shows a schematic block diagram of a selection means 700 of the granularity of downlink occupancy indications of another embodiment of the present invention. Wherein, this device 700 includes:
an information obtaining module 702, configured to obtain preset information of the occupation indication and determine a bit number included in the occupation indication;
a calculating module 704, configured to calculate, according to preset information, a time domain symbol number required to be indicated by the occupancy indication;
a selecting module 706, configured to select an indication granularity of the occupancy indication according to the number of bits and the time-domain symbol number;
a selection module 706 comprising: a comparing module 762 for comparing the number of bits and the number of symbols in the time domain; a selecting module 706, specifically configured to select the first indication granularity as an indication granularity of the occupancy indication when the number of bits is greater than the time-domain symbol number; when the bit number is smaller than or equal to the time domain symbol number, selecting a second indication granularity as the indication granularity of the occupation indication;
a configuration module 708 configured to configure the occupation indication according to the indication granularity;
a sending module 710, configured to send the occupation indication to the terminal.
In this embodiment, a first indication granularity is selected as the indication granularity of the occupancy indication when the number of bits is greater than the number of symbols in the time domain, where the first indication granularity is a {1,7} configuration, that is, the region required to indicate the occupancy indication is divided into 7 blocks in the time domain, and the region required to indicate is divided into 2 blocks in the frequency domain. When the bit number is less than or equal to the number of symbols in the time domain, selecting a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is a configuration of {0, 14}, and 14 bits of the occupation indication are all used for indicating symbols in the time domain, i.e. the region required to be indicated is divided into 14 blocks in the time domain, and the frequency domain defaults to the whole BWP, thereby realizing reasonable selection of the occupation indication.
And the base station configures the occupation indication according to the selected indication granularity and sends the occupation indication to the terminal, so that the eMBB terminal is provided with the relevant information of the URLLC data in the received data, and the demodulation success rate of the data is improved.
Preferably, the preset information includes: the allocation method comprises the following steps of occupying the interval configuration of the sub-carrier of the carrier unit where the indication is located, occupying the interval configuration of the sub-carrier of the carrier unit required to be indicated by the indication, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this embodiment, the preset information includes, but is not limited to, the above information, and the adjustment of the indication granularity is performed through the above information, so that DCI resources can be more effectively utilized, and the probability of occurrence of false alarm indication is reduced. It should be noted that the carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
An embodiment of the third aspect of the present invention provides a method for determining a granularity of downlink occupancy indication, which is used for a terminal, and fig. 8 illustrates a flowchart of the method for determining the granularity of downlink occupancy indication according to an embodiment of the present invention. Wherein, the method comprises the following steps:
According to the method for determining the granularity of the downlink occupation indication, the terminal obtains the preset information of the occupation indication and confirms the bit number contained in the occupation indication. And further, calculating the number of time domain symbols required to be indicated by the occupation indication according to preset information, wherein the time frequency symbols are OFDM symbols. And comparing the bit number with the time domain symbol number so as to determine the indication granularity of the occupation indication selected by the base station according to the comparison result. The method of the invention can more effectively utilize DCI resources, reduce the probability of false alarm indication and improve the performance of the system.
Fig. 9 is a flowchart illustrating a method for determining a granularity of downlink occupancy indication according to another embodiment of the present invention. Wherein, the method comprises the following steps:
step 902, acquiring preset information of an occupation indication and confirming a bit number contained in the occupation indication;
step 910, when the number of bits is less than or equal to the number of time domain symbols, determining the indication granularity of the occupancy indication as a second indication granularity;
In this embodiment, a first indication granularity is determined as the indication granularity of the occupation indication when the number of bits is greater than the number of symbols in the time domain, where the first indication granularity is a {1,7} configuration, that is, a region required to indicate the occupation indication is divided into 7 blocks in the time domain, and a region required to indicate is divided into 2 blocks in the frequency domain. And when the bit number is less than or equal to the time domain symbol number, determining a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is {0, 14}, namely, the region required to be indicated is divided into 14 blocks from the time domain, and the default is the whole BWP on the frequency domain, thereby realizing reasonable determination of the occupation indication.
After receiving the demodulation occupation indication, corresponding the bits in the occupation indication to the time-frequency resources required to be indicated by the occupation indication with the determined indication granularity. For example, when the indication granularity configuration is determined to be {0, 14}, and the occupation indication needs to indicate 14 symbols, the time-frequency resource indicated by one bit is: one symbol in the time domain and the entire BWP in the frequency domain.
Preferably, the preset information includes: the method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this embodiment, the preset information includes, but is not limited to, the above information, and the adjustment of the indication granularity is performed through the above information, so that DCI resources can be more effectively utilized, and the probability of occurrence of false alarm indication is reduced. It should be noted that the carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
For the preset information acquiring process of the terminal, it should be noted that the preset information is configured by the base station (high-level information), but the information has a larger updating period, when a new carrier unit is activated in the updating period, the terminal only needs to obtain the subcarrier interval configuration of the newly activated carrier unit from the base station, and then reads the remaining required information from the preset information (which is not updated) configured by the previous base station, so as to complete the acquiring process of the "updated preset information". The updated preset information is equivalent to that the interval configuration of a certain subcarrier changes after a new carrier unit is added, and the change is not updated and notified by high-level information but is read and updated by a terminal.
In addition, the granularity configuration and understanding of the occupation indication by the terminal and the base station are completed based on the carrier unit environment where the terminal and the base station are located, no additional signaling is needed to inform each other, when the terminal is in a certain carrier unit configuration environment, the base station can correspondingly select a certain granularity configuration (such as {1,7 }), and the terminal can understand the received occupation indication according to {1,7 }.
An embodiment of a fourth aspect of the present invention provides a device for determining granularity of downlink occupancy indication, which is used for a terminal, and fig. 10 shows a schematic block diagram of a device 100 for determining granularity of downlink occupancy indication according to an embodiment of the present invention. Wherein the apparatus 100 comprises:
the information acquisition module 102 is configured to acquire preset information of the occupation indication and determine a bit number included in the occupation indication; a calculating module 104, configured to calculate, according to preset information, a time domain symbol number required to be indicated by the occupancy indication; a determining module 106, configured to determine an indication granularity of the occupancy indication according to the bit number and the time-domain symbol number.
According to the device 100 for determining the granularity of the downlink occupation indication, provided by the invention, the terminal obtains the preset information of the occupation indication and confirms the bit number contained in the occupation indication. And further, calculating the time domain symbol number required to be indicated by the occupation indication according to preset information, wherein the time frequency symbol is an OFDM symbol. And comparing the bit number with the time domain symbol number so as to determine the indication granularity of the occupation indication selected by the base station according to the comparison result. The method of the invention can more effectively utilize DCI resources, reduce the probability of false alarm indication and improve the performance of the system.
Fig. 11 shows a schematic block diagram of the apparatus 110 for determining granularity of downlink occupancy indication according to another embodiment of the present invention. Wherein the apparatus 110 comprises:
an information obtaining module 112, configured to obtain preset information of the occupation indication and determine a bit number included in the occupation indication;
a calculating module 114, configured to calculate, according to preset information, a time domain symbol number required to be indicated by the occupancy indication;
a determining module 116, configured to determine an indication granularity of the occupancy indication according to the bit number and the time-domain symbol number;
a determination module 116 comprising: a comparing module 162, configured to compare the number of bits with the number of symbols in the time domain; a determining module 116, configured to determine, when the bit number is greater than the time-domain symbol number, that the indication granularity of the occupancy indication is a first indication granularity; when the bit number is smaller than or equal to the time domain symbol number, determining the indication granularity of the occupation indication as a second indication granularity;
a receiving and demodulating module 118 for receiving and demodulating the occupation indication;
an allocating module 120, configured to allocate and correspond the bits included in the occupation indication to the time-frequency resources required by the occupation indication according to the indication granularity.
In this embodiment, a first indication granularity is determined as the indication granularity of the occupation indication when the number of bits is greater than the number of symbols in the time domain, where the first indication granularity is a {1,7} configuration, that is, a region required to indicate the occupation indication is divided into 7 blocks in the time domain, and a region required to indicate is divided into 2 blocks in the frequency domain. And when the bit number is less than or equal to the time domain symbol number, determining a second indication granularity as the indication granularity of the occupation indication, wherein the second indication granularity is {0, 14}, namely, the region required to be indicated is divided into 14 blocks from the time domain, and the default is the whole BWP on the frequency domain, thereby realizing reasonable determination of the occupation indication.
After receiving the demodulation occupation indication, corresponding the bits in the occupation indication to the time-frequency resources required to be indicated by the occupation indication with the determined indication granularity. For example, when the indication granularity configuration is determined to be {0, 14}, and the occupation indication needs to indicate 14 symbols, the time-frequency resource indicated by one bit is: one symbol in the time domain and the entire BWP in the frequency domain.
Preferably, the preset information includes: the method comprises the following steps of occupying the subcarrier interval configuration of the carrier unit where the indication is located, occupying the subcarrier interval configuration of the carrier unit required to be indicated, occupying the scheduling period of the indication and the number of symbols contained in a single time slot.
In this embodiment, the preset information includes, but is not limited to, the above information, and the adjustment of the indication granularity is performed through the above information, so that DCI resources can be more effectively utilized, and the probability of occurrence of false alarm indication is reduced. It should be noted that the carrier unit may be a bandwidth of the entire cell, or may be a partial Bandwidth (BWP) of the cell bandwidth.
For the preset information acquiring process of the terminal, it should be noted that the preset information is configured by the base station (high-level information), but the information has a larger updating period, when a new carrier unit is activated in the updating period, the terminal only needs to obtain the subcarrier interval configuration of the newly activated carrier unit from the base station, and then reads the remaining required information from the preset information (which is not updated) configured by the previous base station, so as to complete the acquiring process of the "updated preset information". The updated preset information is equivalent to that the interval configuration of a certain subcarrier changes after a new carrier unit is added, and the change is not updated and notified by high-level information but is read and updated by a terminal.
In addition, the granularity configuration and understanding of the occupation indication by the terminal and the base station are completed based on the carrier unit environment, no additional signaling is needed to inform each other, when the terminal and the base station are in a certain carrier unit configuration environment, the base station can correspondingly select a certain granularity configuration (such as {1,7 }), and the terminal can understand the received occupation indication according to {1,7 }.
In a specific embodiment of the present invention, a method for adjusting granularity of downlink occupancy indication includes the following steps:
step one, the base station selects the indication granularity according to the carrier unit where the occupation indication is located, the subcarrier interval configuration of the indication carrier unit needed by the occupation indication, the occupation indication sending period and the symbol number contained in a single time slot.
The occupation indication granularity selection method can be that the symbol number of the occupation indication required indication is calculated according to the carrier unit where the occupation indication is located, the subcarrier interval configuration of the indication carrier unit required by the occupation indication, the occupation indication sending period and the symbol number contained in a single time slot, when the bit number contained in the occupation indication is more than the symbol number required to be indicated, the configuration of {1,7} is selected, otherwise, the configuration of {0, 14} is selected.
And step two, the base station configures the occupation indication according to the selected indication granularity and sends the occupation indication to the terminal. After configuring the occupancy indication granularity, the base station does not send a signaling to inform the terminal that the configured occupancy indication granularity changes.
And step three, the terminal confirms the indication granularity according to the carrier unit where the occupation indication is located, the subcarrier interval configuration of the carrier unit indicated by the occupation indication, the occupation indication sending period and the symbol number contained in a single time slot, and after receiving and demodulating the occupation indication, the terminal corresponds the bit in the occupation indication to the indicated time-frequency resource according to the indication granularity. That is, the granularity configuration and understanding of the occupation indication by the terminal and the base station are completed based on the carrier unit environment where the terminal and the base station are located, and no additional signaling is needed to inform each other, when the terminal is in a certain carrier unit configuration environment, the base station can correspondingly select a certain granularity configuration (such as {1,7 }), and the terminal can understand the received occupation indication according to {1,7 }.
Since the indication granularity of the current occupation indication is configured by a Radio Resource Control (RRC) layer, but the cell activation of the terminal is based on Media Access Control (MAC) layer information, and the update period of the RRC information is longer than that of the MAC layer, when a new carrier unit is activated, problems such as excessive indication redundancy may occur according to the occupation indication granularity configured by the RRC layer. Therefore, a method for configuring the granularity of occupation indication adaptively is designed, as shown in fig. 12, that is, when the number of bits included in the occupation indication is greater than the number of symbols to be indicated, a part of bits in the occupation indication are used for indication in the frequency domain, and the granularity of indication is adjusted from {0, 14} to {1,7}, so as to better utilize DCI resources and reduce the probability of occurrence of false alarm indication to some extent.
An embodiment of a fifth aspect of the present invention provides a communications device, including any one of the foregoing downlink occupancy indication granularity selecting means; or any one of the above-mentioned determining apparatuses of downlink occupancy indication granularity.
The communication device provided by the present invention includes the determining apparatus for determining the granularity of downlink occupancy indication according to any of the above technical solutions, and therefore the computer device includes all the beneficial effects of the determining apparatus for determining the granularity of downlink occupancy indication according to any of the above technical solutions.
In the description of the present specification, the description of "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A method for selecting downlink occupancy indication granularity, the method being used for a base station, the method comprising:
acquiring preset information of an occupation indication and confirming a bit number contained in the occupation indication;
calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information;
selecting the indication granularity of the occupation indication according to the bit number and the time domain symbol number;
the step of selecting the indication granularity of the occupation indication according to the bit number and the time domain symbol number specifically includes:
comparing the number of bits with the number of time domain symbols;
when the bit number is larger than the time domain symbol number, selecting a first indication granularity as the indication granularity of the occupation indication;
and when the bit number is smaller than or equal to the time domain symbol number, selecting a second indication granularity as the indication granularity of the occupation indication.
2. The method for selecting granularity of downlink occupancy indication according to claim 1, further comprising:
configuring the occupation indication according to the indication granularity;
and sending the occupation indication to a terminal.
3. The method according to claim 1, wherein the preset information includes: the allocation method comprises the following steps of configuring the interval of the sub-carrier of the carrier unit where the occupation indication is located, configuring the interval of the sub-carrier of the carrier unit required to be indicated by the occupation indication, and scheduling period of the occupation indication and the number of symbols contained in a single time slot.
4. An apparatus for selecting granularity of downlink occupancy indication, the apparatus being used for a base station, the apparatus comprising:
the information acquisition module is used for acquiring preset information of the occupation indication and confirming the bit number contained in the occupation indication;
the calculation module is used for calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information;
a selecting module, configured to select an indication granularity of the occupancy indication according to the bit number and the time-domain symbol number;
the selection module comprises:
the comparison module is used for comparing the bit number with the time domain symbol number;
the selecting module is specifically configured to select a first indication granularity as the indication granularity of the occupation indication when the bit number is greater than the time-domain symbol number; and when the bit number is smaller than or equal to the time domain symbol number, selecting a second indication granularity as the indication granularity of the occupation indication.
5. The apparatus for selecting granularity of downlink occupancy indication according to claim 4, further comprising:
a configuration module, configured to configure the occupation indication according to the indication granularity;
and the sending module is used for sending the occupation indication to the terminal.
6. The apparatus as claimed in claim 4, wherein the preset information comprises: the allocation method comprises the following steps of allocating the interval of the sub-carriers of the carrier unit where the occupation indication is located, allocating the interval of the sub-carriers of the carrier unit required to be indicated by the occupation indication, and allocating the dispatching cycle of the occupation indication and the number of symbols contained in a single time slot.
7. A method for determining downlink occupancy indication granularity, which is used for a terminal, includes:
acquiring preset information of an occupation indication and confirming a bit number contained in the occupation indication;
calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information;
determining the indication granularity of the occupation indication according to the bit number and the time domain symbol number;
the step of determining the indication granularity of the occupation indication according to the bit number and the time domain symbol number specifically includes:
comparing the number of bits with the number of time domain symbols;
when the bit number is larger than the time domain symbol number, determining that the indication granularity of the occupation indication is a first indication granularity;
and when the bit number is smaller than or equal to the time domain symbol number, determining the indication granularity of the occupation indication to be a second indication granularity.
8. The method for determining granularity of downlink occupancy indication according to claim 7, further comprising:
receiving and demodulating the occupancy indication;
and according to the indication granularity, allocating and corresponding the bits contained in the occupation indication to the time-frequency resources required to be indicated by the occupation indication.
9. The method of claim 7, wherein the preset information includes: the occupied indication is in the subcarrier interval configuration of the carrier unit, the subcarrier interval configuration of the carrier unit required to be indicated by the occupied indication, the scheduling period of the occupied indication and the number of symbols contained in a single time slot.
10. An apparatus for determining granularity of downlink occupancy indication, the apparatus being used for a terminal, the apparatus comprising:
the information acquisition module is used for acquiring preset information of the occupation indication and confirming the bit number contained in the occupation indication;
the calculation module is used for calculating the time domain symbol number required to be indicated by the occupation indication according to the preset information;
a determining module, configured to determine an indication granularity of the occupancy indication according to the bit number and the time-domain symbol number;
the determining module includes:
the comparison module is used for comparing the bit number with the time domain symbol number;
the determining module is specifically configured to determine, when the number of bits is greater than the time-domain symbol number, that the indication granularity of the occupancy indication is a first indication granularity; and when the bit number is smaller than or equal to the time domain symbol number, determining the indication granularity of the occupation indication to be a second indication granularity.
11. The apparatus for determining granularity of downlink occupancy indication according to claim 10, further comprising:
a receiving and demodulating module for receiving and demodulating the occupation indication;
and the allocation module is used for allocating and corresponding the bits contained in the occupation indication to the time-frequency resources required by the occupation indication according to the indication granularity.
12. The apparatus for determining granularity of downlink occupancy indication according to claim 10, wherein the preset information includes: the occupied indication is in the subcarrier interval configuration of the carrier unit, the subcarrier interval configuration of the carrier unit required to be indicated by the occupied indication, the scheduling period of the occupied indication and the number of symbols contained in a single time slot.
13. A communication device, comprising:
the selection device of the granularity of downlink occupancy indication according to any one of claims 4 to 6; or the apparatus according to any of claims 10 to 12, wherein the apparatus is configured to determine the granularity of downlink occupancy indications.
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