CN110492980B - Data transmission method and device and user equipment - Google Patents
Data transmission method and device and user equipment Download PDFInfo
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- CN110492980B CN110492980B CN201910758356.4A CN201910758356A CN110492980B CN 110492980 B CN110492980 B CN 110492980B CN 201910758356 A CN201910758356 A CN 201910758356A CN 110492980 B CN110492980 B CN 110492980B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/26—Resource reservation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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Abstract
The invention provides a data transmission method, a data transmission device and user equipment. The method comprises the following steps: determining a resource selection range of transmission resources required by each data transmission; selecting the resources of the transmission resources required by data transmission in the resource selection range, and triggering the resource selection of the transmission resources required by the next data transmission in a preset time period before the time domain position of the selected transmission resources; and transmitting data according to the selected transmission resource. The invention can complete data transmission of all times within the time requirement range, and maximizes the selection range of transmission resources required by each data transmission.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, an apparatus, and a user equipment.
Background
In the chairman conference record formed by RAN1#96 conferences, NR (New Radio, New air interface) V2X (Vehicle to outside information exchange) supports blind retransmission.
In the chairman conference record formed by RAN1#97 conference, there are two resource reservation modes for blind retransmission, mode 1: one transmission may reserve more than 1 blind retransmission resource; mode 2: a transmission reserves the resources of only one blind retransmission and it is necessary to determine which way to use in the following conference discussion.
In the chairman conference record formed by RAN1#97 conference, a resource selection window is defined as a time interval in which a user selects transmission resources, wherein the starting position of the resource selection window is a time position separated by a time T1(T1> -0) after a resource selection trigger, and the ending position of the resource selection window at least considers a delay requirement. Other conditions need to be taken into further consideration.
LTE V2X supports a maximum number of transmissions of 2, i.e. an initial transmission and a blind retransmission. When the data packet arrives, the resource selection is triggered, and the resource selection window is [ n + T1, n + T2 ]. Wherein T1< ═ 4ms, T2< ═ 100ms, and the specific values of T1 and T2 depend on the UE implementation.
Since the reliability requirement in NR V2X is very high, the number of supported transmissions should be greater than 2.
Since the NR V2X blind retransmission option2 supports one transmission to reserve resources for the next transmission, it is necessary to design a resource selection window for each resource selection. While the design of the resource selection window in LTE V2X is not suitable for NR V2X blind retransmissions where the number of transmissions is greater than 2 and where each transmission selects the reserved resources for the next transmission.
Disclosure of Invention
The data transmission method, the data transmission device and the user equipment can complete data transmission of all times within a time requirement range, and maximize the selection range of transmission resources required by each data transmission.
In a first aspect, the present invention provides a data transmission method, including:
determining a resource selection range of transmission resources required by each data transmission;
selecting the resources of the transmission resources required by data transmission in the resource selection range, and triggering the resource selection of the transmission resources required by the next data transmission in a preset time period before the time domain position of the selected transmission resources;
and transmitting data according to the selected transmission resource.
Optionally, the determining a resource selection range of transmission resources required for each data transmission includes:
determining a resource selection range of transmission resources required by the first data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement;
and determining a resource selection range of transmission resources required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position of the transmission resources of the kth-1 th data transmission, wherein k is an integer larger than 1, and is smaller than or equal to the total transmission times of the data packet.
Optionally, the method further comprises:
determining transmission resources available for first data transmission according to a sensing result of a resource sensing window before a data packet arrives, wherein the range of the resource sensing window is determined according to the arrival time of the data packet and the size of the resource sensing window;
and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 1, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, the determining a resource selection range of transmission resources required for each data transmission includes:
determining the resource selection range of transmission resources required by the first data transmission and the 2 nd data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement;
and determining a resource selection range of transmission resources required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position of the transmission resources of the kth-1 th data transmission, wherein k is an integer larger than 2, and is less than or equal to the total transmission times of the data packet.
Optionally, the method further comprises:
determining transmission resources available for first data transmission and 2 nd data transmission according to a sensing result of a resource sensing window before a data packet arrives, wherein the range of the resource sensing window is determined according to the arrival time of the data packet and the size of the resource sensing window;
and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 2, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, an indication of transmission resources required for the next data transmission is reserved in each data transmission.
In a second aspect, the present invention provides a data transmission apparatus, including:
a first determining unit, configured to determine a resource selection range of transmission resources required for each data transmission;
a selecting unit, configured to select a resource of a transmission resource required for data transmission in the resource selection range, and trigger resource selection of the transmission resource required for next data transmission in a predetermined time period before a time domain position of the selected transmission resource;
and the transmission unit is used for transmitting data according to the selected transmission resource.
Optionally, the first determining unit is configured to determine a resource selection range of a transmission resource required for first data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, and the transmission time requirement, and determine a resource selection range of a transmission resource required for kth data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, the transmission time requirement, and a time domain position where the transmission resource for kth-1 data transmission is located, where k is an integer greater than 1, and k is less than or equal to the total number of transmission times of the data packet.
Optionally, the apparatus further comprises:
a second determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 1, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, the first determining unit is configured to determine a resource selection range of a transmission resource required for first data transmission and second data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, and the transmission time requirement, and determine the resource selection range of the transmission resource required for the kth data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, the transmission time requirement, and a time domain position where the transmission resource of the kth-1 data transmission is located, where k is an integer greater than 2, and k is less than or equal to the total number of transmission times of the data packet.
Optionally, the apparatus further comprises:
a third determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission and second data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 2, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, an indication of transmission resources required for the next data transmission is reserved in each data transmission. In a third aspect, the present invention provides a user equipment, where the user equipment includes the above data transmission device.
The data transmission method, the data transmission device and the user equipment provided by the embodiment of the invention determine the resource selection range of the transmission resource required by each data transmission and perform resource selection, trigger the resource selection of the transmission resource required by the next data transmission within a preset time period before the time domain position of the selected transmission resource, and then perform data transmission according to the selected transmission resource, thereby completing the data transmission of all times within the time requirement range and maximizing the selection range of the transmission resource required by each data transmission.
Drawings
FIG. 1 is a flow chart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a time interval configuration between two adjacent data transmissions according to an embodiment of the present invention;
fig. 3 is a schematic configuration diagram of a resource sensing window and a resource selection window for 3 times data transmission according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of resource selection for first data transmission according to embodiment 1 of the present invention;
fig. 5 is a schematic view of resource selection for data transmission 2 according to embodiment 1 of the present invention;
fig. 6 is a schematic diagram of resource selection for data transmission of the 3 rd time according to embodiment 1 of the present invention;
fig. 7 is a schematic configuration diagram of resource sensing windows and resource selection windows for 3 times data transmission according to embodiment 2 of the present invention;
fig. 8 is a schematic diagram of resource selection for first data transmission and second data transmission according to embodiment 2 of the present invention;
fig. 9 is a schematic diagram of resource selection for data transmission of the 3 rd time according to embodiment 2 of the present invention;
fig. 10 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a data transmission method, where the method is applied to a UE, and as shown in fig. 1, the method includes:
and S11, determining the resource selection range of the transmission resources required by each data transmission.
S12, selecting the transmission resource needed by data transmission in the resource selection range, and triggering the resource selection of the transmission resource needed by the next data transmission in a preset time period before the time domain position of the selected transmission resource.
And S13, transmitting data according to the selected transmission resource.
The data transmission method provided by the embodiment of the invention determines the resource selection range of the transmission resource required by each data transmission and performs resource selection, triggers the resource selection of the transmission resource required by the next data transmission in a preset time period before the time domain position of the selected transmission resource, and then performs data transmission according to the selected transmission resource, thereby completing the data transmission of all times in the time requirement range and maximizing the selection range of the transmission resource required by each data transmission.
The data transmission method of the present invention is described in detail with reference to specific embodiments.
Example 1
For the blind retransmission of NR V2X, when the total transmission times are L and the transmission time requirement is TBFirst, a resource sensing window representing the range of available transmission resources for each data transmission and a resource selection window representing the range of resource selection of transmission resources required for each data transmission are determined. As shown in fig. 2, the time interval T between two adjacent data transmissionsgapNot less than 1. Wherein:
the resource sensing window representing the range of available transmission resources for the first data transmission is:
[n-a,n-1]
the resource sensing window representing the range of the transmission resources available for the kth data transmission is:
[nRA(k-1)-T1′-a,nRA(k-1)-T1′]
wherein n is the arrival time of the data packet, a is a preset value and represents the size of the resource sensing window, and nRA(k-1)Is the time domain position of the transmission resource of the (k-1) th data transmission, k is an integer greater than 1k≤L，T1Is a preset value and T1′≤4ms。
The resource selection window representing the resource selection range of the transmission resource required for the first data transmission, i.e. the resource selection window range when the resource selection is triggered for the first time, is:
the resource selection window representing the resource selection range of the transmission resource required for the kth data transmission, that is, the resource selection window representing the resource selection window range when the resource selection is triggered at the kth time, is:
where n is the arrival time of the packet, T1Is a predetermined value and T1≤4ms，TBFor the transmission time requirement of the data packet, L is the total transmission times of the data packet, nRA(k-1)The starting position of the resource selection window of each transmission resource is the position of the last transmission resource plus 1.
The following description will take 3 data transmissions as an example.
As shown in FIG. 3, when the total number of transmission times is 3 and the transmission time requirement is TBFirst, a resource sensing window representing the range of available transmission resources for each data transmission and a resource selection window representing the range of resource selection of transmission resources required for each data transmission are determined. Wherein the content of the first and second substances,
the resource sensing window for each data transmission is:
Sensing window1：[n-a,n-1]
Sensing window2：[nRA1-T1′-a,nRA1-T1′]
Sensing window3：[nRA2-T1′-a,nRA2-T1′]
wherein n is the arrival time of the data packet, a is the size of the resource sensing window, and nRA1Time domain position, n, of transmission resource for the 1 st data transmissionRA2Time domain position, T, of transmission resource for 2 nd data transmission1Is a preset value and T1' < 4ms, the specific value depends on the UE implementation.
The resource selection window for each data transmission is:
Selection window1：
Selection window2：
Selection window3：[nRA2+1,n+TB)]
where n is the arrival time of the packet, T1Is a predetermined value and T1≤4ms，TBFor the transmission time requirement of a data packet, nRA1Time domain position, n, of transmission resource for the 1 st data transmissionRA2For the time domain position of the transmission resource of the 2 nd data transmission, the starting position of the resource selection window of each transmission resource is the position of the last transmission resource plus 1.
As shown in fig. 4, when a data packet arrives, resource Selection for the first data transmission is triggered, the corresponding resource Sensing window is Sensing window1, and the resource Selection window is Selection window 1.
As shown in fig. 5, the selection of resources for the second data transmission is triggered before the first data transmission, with the triggering time nRA1-T1' the corresponding resource Sensing window is Sensing window2, the resource Selection window is Selection window2, and the resource required for the second selected data transmission is reserved in the first data transmission.
As shown in fig. 6, the selection of resources for the third transmission is triggered before the second transmission, at a time nRA2-T1', the corresponding resource Sensing window is Sensing window3, and the resource selection window isSelection window3, the resource required for the third selected data transmission is indicated in the second data transmission reservation.
Therefore, 3 times of data transmission can be guaranteed to be completed within the time requirement range, and the resource selection range of the resources required by each data transmission is larger and more flexible.
Example 2
Unlike embodiment 1, the resource for the first transmission and the resource for the second transmission are triggered and then selected separately in embodiment 1, whereas in embodiment 2, the resource selection for the first transmission and the resource selection for the second transmission are both triggered at time n (packet arrival time), and then both resources are selected together within the same resource selection window, and then the selected resource for the second transmission is indicated in the first transmission.
For the blind retransmission of NR V2X, when the total transmission times are L and the transmission time requirement is TBFirst, a resource sensing window representing the range of available transmission resources for each data transmission and a resource selection window representing the range of resource selection of transmission resources required for each data transmission are determined.
The resource sensing window representing the available transmission resource range for the first data transmission and the 2 nd data transmission is:
[n-a,n-1]
the resource sensing window representing the range of the transmission resources available for the kth data transmission is:
[nRA(k-1)-T1′-a,nRA(k-1)-T1′]
wherein n is the arrival time of the data packet, a is a preset value and represents the size of the resource sensing window, and nRA(k-1)Is the time domain position of the transmission resource of the kth-1 data transmission, k is an integer larger than 2 and is less than or equal to L, T1Is a preset value and T1′≤4ms。
The resource selection window representing the resource selection range of transmission resources required for the first data transmission and the 2 nd data transmission, that is, the resource selection window range representing the resource selection window range when the resource selection is triggered for the first time and the 2 nd time, is:
the resource selection window representing the resource selection range of the transmission resource required for the kth data transmission, that is, the resource selection window representing the resource selection window range when the resource selection is triggered at the kth time, is:
where n is the arrival time of the packet, T1Is a predetermined value and T1≤4ms，TBFor the transmission time requirement of the data packet, L is the total transmission times of the data packet, nRA(k-1)The starting position of the resource selection window of each transmission resource is the position of the last transmission resource plus 1.
The following description will take 3 data transmissions as an example.
As shown in FIG. 7, when the total number of transmission times is 3 and the transmission time requirement is TBFirst, a resource sensing window representing the range of available transmission resources for each data transmission and a resource selection window representing the range of resource selection of transmission resources required for each data transmission are determined. Wherein the content of the first and second substances,
the resource sensing window for each data transmission is:
Sensing window1&2：[n-a,n-1]
Sensing window3：[nRA2-T1′-a,nRA2-T1′]
wherein n is the arrival time of the data packet, a is the size of the resource sensing window, and nRA2Time domain position, T, of transmission resource for 2 nd data transmission1Is a preset value and T1' < 4ms, the specific value depends on the UE implementation.
The resource selection window for each data transmission is:
Selection window1&2：
Selection window3：[nRA2+1,n+TB)]
where n is the arrival time of the packet, T1Is a predetermined value and T1≤4ms，TBFor the total time of transmission of the data packet, nRA2For the time domain position of the transmission resource of the 2 nd data transmission, the starting position of the resource selection window of each transmission resource is the position of the last transmission resource plus 1.
As shown in fig. 8, when a data packet arrives, resource Selection for first data transmission and 2 nd data transmission is triggered, then according to the Sensing result of the resource Sensing window1&2, resource Selection is performed in the resource Selection window1&2, two resources are selected for the first data transmission and the 2 nd data transmission, respectively, wherein the resource for the 2 nd data transmission reserves an indication in the first data transmission.
As shown in FIG. 9, the resource selection for the 3 rd data transmission is triggered before the 2 nd data transmission, and the triggering time is nRA2-T1' and then selects resources for transmission of the 2 nd transmission within a resource Selection window3 according to the Sensing result within the resource Sensing window3, the selected resources having a reservation indication in the 2 nd transmission.
Therefore, 3 times of data transmission can be guaranteed to be completed within the time requirement range, and the resource selection range of the resources required by each data transmission is larger and more flexible.
An embodiment of the present invention further provides a data transmission apparatus, where the apparatus is located in a UE, and as shown in fig. 10, the apparatus includes:
a first determining unit 11, configured to determine a resource selection range of transmission resources required for each data transmission;
a selecting unit 12, configured to select a resource of a transmission resource required for data transmission in the resource selection range, and trigger resource selection of the transmission resource required for next data transmission in a predetermined time period before a time domain position of the selected transmission resource;
a transmission unit 13, configured to perform data transmission according to the selected transmission resource.
The data transmission device provided by the embodiment of the invention determines the resource selection range of the transmission resource required by each data transmission and performs resource selection, triggers the resource selection of the transmission resource required by the next data transmission in a preset time period before the time domain position of the selected transmission resource, and performs data transmission according to the selected transmission resource, thereby completing the data transmission of all times in the time requirement range and maximizing the selection range of the transmission resource required by each data transmission.
Optionally, the first determining unit 11 is configured to determine a resource selection range of a transmission resource required for first data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, and the transmission time requirement, and determine a resource selection range of a transmission resource required for kth data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, the transmission time requirement, and a time domain position where the transmission resource of kth-1 data transmission is located, where k is an integer greater than 1, and k is less than or equal to the total number of transmission times of the data packet.
Optionally, the apparatus further comprises:
a second determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 1, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, the first determining unit 11 is configured to determine a resource selection range of a transmission resource required for first data transmission and second data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, and the transmission time requirement, and determine the resource selection range of the transmission resource required for the kth data transmission according to the arrival time of the data packet, the total number of transmission times of the data packet, the transmission time requirement, and a time domain position where the transmission resource of the kth-1 data transmission is located, where k is an integer greater than 2, and k is less than or equal to the total number of transmission times of the data packet.
Optionally, the apparatus further comprises:
a third determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission and second data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 2, and k is smaller than or equal to the total transmission times of the data packet.
Optionally, an indication of transmission resources required for the next data transmission is reserved in each data transmission.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
The embodiment of the invention also provides the user equipment, and the user equipment comprises the data transmission device.
It will be understood by those skilled in the art that all or part of the processes of the embodiments of the methods described above may be implemented by a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method of data transmission, comprising:
determining a resource selection range of transmission resources required by each data transmission;
selecting the resources of the transmission resources required by data transmission in the resource selection range, and triggering the resource selection of the transmission resources required by the next data transmission in a preset time period before the time domain position of the selected transmission resources;
performing data transmission according to the selected transmission resource;
the determining the resource selection range of the transmission resource required by each data transmission comprises:
determining a resource selection range of transmission resources required by the first data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement; determining a resource selection range of transmission resources required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position of the transmission resources of the kth-1 th data transmission, wherein k is an integer greater than 1 and is less than or equal to the total transmission times of the data packet; alternatively, the first and second electrodes may be,
determining the resource selection range of transmission resources required by the first data transmission and the 2 nd data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement; and determining a resource selection range of transmission resources required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position of the transmission resources of the kth-1 th data transmission, wherein k is an integer larger than 2, and is less than or equal to the total transmission times of the data packet.
2. The method of claim 1, wherein when determining the resource selection range of the transmission resources required for the first data transmission according to the arrival time of the data packet, the total number of transmissions of the data packet, and the transmission time requirement, the method further comprises:
determining transmission resources available for first data transmission according to a sensing result of a resource sensing window before a data packet arrives, wherein the range of the resource sensing window is determined according to the arrival time of the data packet and the size of the resource sensing window;
and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 1, and k is smaller than or equal to the total transmission times of the data packet.
3. The method of claim 1, wherein when determining the resource selection range of the transmission resources required for the first data transmission and the 2 nd data transmission according to the arrival time of the data packet, the total number of transmissions of the data packet, and the transmission time requirement, the method further comprises:
determining transmission resources available for first data transmission and 2 nd data transmission according to a sensing result of a resource sensing window before a data packet arrives, wherein the range of the resource sensing window is determined according to the arrival time of the data packet and the size of the resource sensing window;
and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 2, and k is smaller than or equal to the total transmission times of the data packet.
4. A method according to any one of claims 1 to 3, characterized in that in each data transmission an indication of the transmission resources required for the next data transmission is reserved.
5. A data transmission apparatus, comprising:
a first determining unit, configured to determine a resource selection range of transmission resources required for each data transmission;
a selecting unit, configured to select a resource of a transmission resource required for data transmission in the resource selection range, and trigger resource selection of the transmission resource required for next data transmission in a predetermined time period before a time domain position of the selected transmission resource;
a transmission unit, configured to perform data transmission according to the selected transmission resource;
the first determining unit is used for determining a resource selection range of transmission resources required by the first data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement, and determining a resource selection range of the transmission resources required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position of the transmission resources of the kth-1 data transmission, wherein k is an integer greater than 1, and k is less than or equal to the total transmission times of the data packet; or, the resource selection range is used for determining the resource selection range of the transmission resource required by the first data transmission and the 2 nd data transmission according to the arrival time of the data packet, the total transmission times of the data packet and the transmission time requirement, and determining the resource selection range of the transmission resource required by the kth data transmission according to the arrival time of the data packet, the total transmission times of the data packet, the transmission time requirement and the time domain position where the transmission resource of the kth-1 th data transmission is located, wherein k is an integer greater than 2, and k is less than or equal to the total transmission times of the data packet.
6. The apparatus according to claim 5, wherein when the first determining unit is configured to determine the resource selection range of the transmission resource required for the first data transmission according to the arrival time of the data packet, the total number of transmissions of the data packet, and the transmission time requirement, the apparatus further comprises:
a second determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 1, and k is smaller than or equal to the total transmission times of the data packet.
7. The apparatus according to claim 5, wherein when the first determining unit is configured to determine the resource selection range of the transmission resources required for the first data transmission and the 2 nd data transmission according to the arrival time of the data packet, the total number of transmissions of the data packet, and the transmission time requirement, the apparatus further comprises:
a third determining unit, configured to determine, according to a sensing result of a resource sensing window before a data packet arrives, a transmission resource available for first data transmission and second data transmission, where a range of the resource sensing window is determined according to an arrival time of the data packet and a size of the resource sensing window; and determining transmission resources available for the kth data transmission according to a sensing result of a resource sensing window before the kth data transmission, wherein the range of the resource sensing window is determined according to the time domain position of the transmission resources of the kth data transmission and the size of the resource sensing window, k is an integer larger than 2, and k is smaller than or equal to the total transmission times of the data packet.
8. The apparatus according to any of claims 5 to 7, wherein an indication of transmission resources required for the next data transmission is reserved in each data transmission.
9. A user equipment, characterized in that the user equipment comprises a data transmission device according to any one of claims 5 to 8.
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| EP4128932A4 (en) * | 2020-03-24 | 2023-11-22 | Lenovo (Beijing) Limited | Method and apparatus for sidelink resource re-evaluation |
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