CN111294167A - Method and device for determining time-frequency position of resource, storage medium and terminal - Google Patents

Method and device for determining time-frequency position of resource, storage medium and terminal Download PDF

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CN111294167A
CN111294167A CN201910247850.4A CN201910247850A CN111294167A CN 111294167 A CN111294167 A CN 111294167A CN 201910247850 A CN201910247850 A CN 201910247850A CN 111294167 A CN111294167 A CN 111294167A
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resource
frequency domain
time
indication information
time domain
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CN111294167B (en
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曲鑫
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Beijing Spreadtrum Hi Tech Communications Technology Co Ltd
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Beijing Spreadtrum Hi Tech Communications Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and a device for determining time-frequency positions of resources, a storage medium and a terminal are provided, wherein the method comprises the following steps: receiving auxiliary link control information; determining a time-frequency position of a second resource according to time domain indication information, frequency domain indication information and a first resource, wherein the first resource is a resource transmitted by PSSCH transmission of this time scheduled by auxiliary link control information, and the second resource is a resource transmitted by previous PSSCH transmission corresponding to a TB carried by PSSCH of the first resource transmission; the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or to indicate a preset frequency domain partition to which the second resource belongs. The scheme provided by the invention can effectively distinguish the link when the layer-1 source identifiers and the layer-1 target identifiers of a plurality of UE collide, thereby greatly improving the success rate of HARQ combination.

Description

Method and device for determining time-frequency position of resource, storage medium and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a time-frequency location of a resource, a storage medium, and a terminal.
Background
With the development of the 3rd Generation Partnership Project (3 GPP), New Radio (NR, which may also be referred to as New air interface) vehicle-to-outside information exchange (vehicle to X, V2X, which may also be referred to as vehicle to evolution) is being researched as a key technical direction of the protocol Release 16(Release 16, R16). The enhancement of the NR V2X technology as Long Term Evolution (LTE for short) V2X is a key technical means for enabling the internet of vehicles.
The NR V2X can support three data transmission modes of unicast, multicast and broadcast to meet various service requirements of the Internet of vehicles. In order to improve the reliability of unicast and multicast communications, 3GPP has already discussed and agreed, and introduces a Layer-1 (Layer-1) feedback mechanism, such as a Hybrid Automatic Repeat reQuest (HARQ) feedback mechanism, and introduces a Layer-1 retransmission and HARQ combining mechanism based on HARQ feedback.
In order to implement a combining mechanism based on HARQ retransmission for layer-1, a secondary link receiving user needs to determine multiple transmissions corresponding to the same Transport Block (TB) and combine them. Therefore, in the existing protocol, a layer-1 source identifier and a layer-1 destination identifier are introduced into secondary link Control Information (SCI) so that a User Equipment (User Equipment, UE) serving as a receiving end can accurately identify one or more TBs belonging to the same TB from among a plurality of TBs received.
On the other hand, in order to reduce SCI signaling overhead, one way to determine the layer-1 source identifier and the layer-1 destination identifier is currently under discussion: the Layer-1 source identification and the Layer-1 destination identification are derived from a part of bit information of the Layer-2 source (Layer-2) identification and the Layer-2 destination identification, such as 8 bits of 24 bits.
However, such a design would cause a source identification and destination identification collision to occur at layer-1, resulting in HARQ combining failure.
Disclosure of Invention
The technical problem solved by the invention is how to effectively distinguish the link when the layer-1 source identification and the layer-1 target identification of a plurality of UE collide so as to improve the success rate of HARQ combination.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for determining a time-frequency position of a resource, where the method includes: receiving auxiliary link control information, wherein the auxiliary link control information comprises time domain indication information and frequency domain indication information; determining a time-frequency position of a second resource according to the time domain indication information, the frequency domain indication information and a first resource, wherein the first resource is a resource transmitted by PSSCH transmission of this time scheduled by the secondary link control information, and the second resource is a resource transmitted by PSSCH transmission of the previous time corresponding to a TB carried by PSSCH of the first resource transmission; wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
Optionally, the time domain indication information includes: a time domain interval, the time domain interval being a time interval of a time domain position of the first resource and a time domain position of the second resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: and determining the time domain position of the second resource according to the time domain interval and the time domain position of the first resource.
Optionally, the time domain interval included in the time domain indication information is a time domain interval value from a preset time domain interval set, where the preset time domain interval set is determined by a configuration or pre-configuration manner.
Optionally, the time domain indication information includes: an index of a time domain interval, where the time domain interval is a time interval between a time domain position of the first resource and a time domain position of the second resource, and an association relationship between the time domain interval and the index is determined in a configuration or pre-configuration manner; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: determining a corresponding time domain interval according to the index of the time domain interval and the incidence relation; and determining the time domain position of the second resource according to the determined time domain interval and the time domain position of the first resource.
Optionally, the frequency domain indication information includes: a frequency domain interval, the frequency domain interval being an interval of a frequency domain position of the first resource and a frequency domain position of the second resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: and determining the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource.
Optionally, the frequency domain indication information includes: a first relative position, the first relative position being a relative position of a frequency domain position of the second resource with respect to a frequency domain position of the first resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: and determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource.
Optionally, the first relative position is used to indicate: determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource includes: and determining that the frequency domain position of the second resource is above or below the frequency domain position of the first resource according to the size relation in the frequency domain.
Optionally, the preset frequency domain partition refers to: on a frequency domain, dividing a PSSCH transmission resource pool or a frequency domain partition obtained by BWP according to a preset interval; the frequency domain indication information includes: a second relative position, configured to indicate a preset frequency domain partition to which the frequency domain position of the second resource belongs; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: determining a relative position of the frequency domain position of the second resource within the PSSCH transmission resource pool or BWP based on the second relative position.
Optionally, the second resource is used to send the first-time transmission data or the nth-time retransmission data, and the first resource is used to send the (n + 1) -th retransmission resource, where n is greater than or equal to 1.
Optionally, the time-frequency position includes: a time domain location; a frequency domain location; the time domain position comprises a time domain starting position or a time domain ending position, and the frequency domain position comprises a frequency domain starting position or a frequency domain ending position.
In order to solve the foregoing technical problem, an embodiment of the present invention further provides a device for determining a time-frequency position of a resource, where the device includes: a receiving module, configured to receive auxiliary link control information, where the auxiliary link control information includes time domain indication information and frequency domain indication information; a determining module, configured to determine, according to the time domain indication information, the frequency domain indication information, and a first resource, a time-frequency position of a second resource, where the first resource is a resource sent by a current PSSCH transmission scheduled by the secondary link control information, and the second resource is a resource sent by a previous PSSCH transmission corresponding to a TB carried by a PSSCH transmitted by the first resource; wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions, where the computer instructions execute the steps of the above method when executed.
In order to solve the above technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to perform the steps of the method.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method for determining time-frequency positions of resources, which comprises the following steps: receiving auxiliary link control information, wherein the auxiliary link control information comprises time domain indication information and frequency domain indication information; determining a time-frequency position of a second resource according to the time domain indication information, the frequency domain indication information and a first resource, wherein the first resource is a resource transmitted by PSSCH transmission of this time scheduled by the secondary link control information, and the second resource is a resource transmitted by PSSCH transmission of the previous time corresponding to a TB carried by PSSCH of the first resource transmission; wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
Compared with the scheme of indicating the time-frequency domain information of the TB including the initial transmission and the multi-transmission of all the retransmissions in the SCI in the prior art, the scheme of the embodiment of the invention can effectively distinguish the link when the layer-1 source identifiers and the layer-1 target identifiers of a plurality of UEs collide while improving the resource utilization rate, thereby greatly improving the success rate of the HARQ combination. Specifically, based on the time domain indication information and the frequency domain indication information, the relative time-frequency domain position of the previous transmission (corresponding to the second resource) relative to the current transmission (corresponding to the first resource) of the same TB can be indicated by the SCI, so that when the layer-1 source identifier and the layer-1 destination identifier collide, the time-frequency domain position of the previous transmission, which belongs to the same TB as the TB currently transmitted TB, can still be determined according to the relative time-frequency domain position indicated by the SCI. Therefore, the combination of the previous decoding result of the same TB and the decoding result of the current transmission becomes possible, and the HARQ combination can still be successfully completed when the collision occurs between the layer-1 source identifier and the layer-1 destination identifier.
Further, the time domain indication information includes: an index of a time domain interval, where the time domain interval is a time interval between a time domain position of the first resource and a time domain position of the second resource, and an association relationship between the time domain interval and the index is determined in a configuration or pre-configuration manner; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: determining a corresponding time domain interval according to the index of the time domain interval and the incidence relation; and determining the time domain position of the second resource according to the determined time domain interval and the time domain position of the first resource. Therefore, the signaling overhead of the SCI can be saved, and the time interval between the time domain position of the current transmission and the time domain position of the previous transmission of the same TB can be accurately indicated, so that the UE can accurately determine the time domain position of the second resource.
Further, the frequency domain indication information includes: a frequency domain interval, the frequency domain interval being an interval of a frequency domain position of the first resource and a frequency domain position of the second resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: and determining the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource. Therefore, the UE can accurately determine the frequency domain position of the second resource by indicating the interval between the frequency domain position of the current transmission and the frequency domain position of the previous transmission of the same TB.
Further, the frequency domain indication information includes: a first relative position, the first relative position being a relative position of a frequency domain position of the second resource with respect to a frequency domain position of the first resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: and determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource. Therefore, the UE can accurately determine the frequency domain position of the second resource by indicating the relative position of the frequency domain position of the previous transmission of the same TB relative to the frequency domain position of the current transmission.
Further, the preset frequency domain partition refers to: on a frequency domain, dividing a PSSCH transmission resource pool or a frequency domain partition obtained by BWP according to a preset interval; the frequency domain indication information includes: a second relative position, configured to indicate a preset frequency domain partition to which the frequency domain position of the second resource belongs; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes: determining a relative position of the frequency domain position of the second resource within the PSSCH transmission resource pool or BWP based on the second relative position. Therefore, the UE can determine the approximate range of the frequency domain position of the second resource by indicating the second relative position of the frequency domain position of the previous transmission corresponding to the TB of the PSSCH transmission in the preset frequency domain partition.
Drawings
FIG. 1 is a flowchart of a method for determining a time-frequency location of a resource according to an embodiment of the present invention;
FIG. 2 is a flowchart of one embodiment of step S102 of FIG. 1;
FIG. 3 is a communication diagram of an exemplary application scenario in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the time-frequency domain location of a resource of the scenario of FIG. 3;
FIG. 5 is a schematic diagram of the time-frequency domain location of another resource of the scenario of FIG. 3;
FIG. 6 is a schematic diagram of the time-frequency domain location of yet another resource of the scenario shown in FIG. 3;
fig. 7 is a schematic structural diagram of an apparatus for determining a time-frequency location of a resource according to an embodiment of the present invention.
Detailed Description
As background, in NR V2X communication, the layer-1 source identification and the layer-1 destination identification may be from a portion of the layer-2 source identification and the layer-2 destination identification, such as 8 bits from the layer-2 identification, respectively. Since the layer-2 source identifier and the layer-2 destination identifier have 24 bits respectively, but only 8 bits are carried in the layer-1 correspondingly, the layer-1 source identifiers and the layer-1 destination identifiers of different UEs collide with each other, and the link cannot be distinguished. Further, when implementing the combining mechanism based on HARQ retransmission in layer-1, the foregoing problem may cause a UE (hereinafter, referred to as a receiving UE) as a receiving end to simultaneously receive TBs respectively transmitted from multiple UEs as transmitting ends, and the receiving UE cannot effectively distinguish which TB corresponds to a previous transmission, thereby causing HARQ combining failure.
One solution that currently exists is: the SCI indicates the time-frequency domain information of multiple transmissions of one TB including the initial transmission and all retransmissions. For example, assuming that a TB is transmitted four times, the SCI indicates the time-frequency domain location of the four transmissions at each transmission.
When the layer-1 source identifier and the layer-1 destination identifier collide, the receiving UE can find the time-frequency domain position of multiple transmission of one TB according to the time-frequency domain information of multiple transmission corresponding to the TB for carrying out HARQ combination by the solution. However, such a solution requires reserving resources for multiple transmissions of one TB, and resource utilization is low. For example, if the TB is successfully decoded by the receiving UE at the initial transmission and an HARQ-ACKnowledgement (ACK) feedback is sent, the three subsequent retransmissions will not occur in practice, but according to the provision of the solution, all time-frequency domain positions of the TB at the initial transmission and the three subsequent retransmissions must be indicated in the initial transmission SCI, which will definitely cause resource waste.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for determining a time-frequency position of a resource, where the method includes: receiving auxiliary link control information, wherein the auxiliary link control information comprises time domain indication information and frequency domain indication information; determining a time-frequency position of a second resource according to the time domain indication information, the frequency domain indication information and a first resource, wherein the first resource is a resource transmitted by PSSCH transmission of this time scheduled by the secondary link control information, and the second resource is a resource transmitted by PSSCH transmission of the previous time corresponding to a TB carried by PSSCH of the first resource transmission; wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
By adopting the scheme of the embodiment of the invention, the resource utilization rate can be improved, and simultaneously, the link can be effectively distinguished when the layer-1 source identification and the layer-1 target identification of a plurality of UE collide, thereby greatly improving the HARQ merging success rate. Specifically, based on the time domain indication information and the frequency domain indication information, the relative time-frequency domain position of the previous transmission (corresponding to the second resource) relative to the current transmission (corresponding to the first resource) of the same TB can be indicated by the SCI, so that when the layer-1 source identifier and the layer-1 destination identifier collide, the time-frequency domain position of the previous transmission, which belongs to the same TB as the TB currently transmitted TB, can still be determined according to the relative time-frequency domain position indicated by the SCI. Therefore, the combination of the previous decoding result of the same TB and the decoding result of the current transmission becomes possible, and the HARQ combination can still be successfully completed when the collision occurs between the layer-1 source identifier and the layer-1 destination identifier.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a method for determining a time-frequency location of a resource according to an embodiment of the present invention. The scheme of the embodiment can be applied to a vehicle networking scene, such as an NR V2X scene. The scheme of this embodiment may be performed by the user equipment side, such as by the receiving UE. The receiving UE may determine the time-frequency position of the second resource corresponding to the currently received first resource by using the scheme of this embodiment, and further perform HARQ combining decoding.
Specifically, referring to fig. 1, the method for determining the time-frequency position of the resource according to this embodiment may include the following steps:
step S101, receiving auxiliary link control information, wherein the auxiliary link control information comprises time domain indication information and frequency domain indication information;
step S102, determining the time-frequency position of a second resource according to the time domain indication information, the frequency domain indication information and the first resource;
the first resource is a resource transmitted by the current PSSCH transmission scheduled by the secondary link control information, and the second resource is a resource transmitted by the previous PSSCH transmission corresponding to a TB carried by the PSSCH transmitted by the first resource.
Specifically, the time domain indication information may be used to indicate a deviation of the first resource from the second resource in a time domain.
More specifically, the frequency domain indication information may be used to indicate a deviation of the first resource from the second resource in a frequency domain, or may be used to indicate a preset frequency domain partition to which the second resource belongs.
Further, the time-frequency location may include a time-domain location and a frequency-domain location. The following is a detailed description of determining the time domain position of the second resource based on the time domain indication information, and determining the frequency domain position of the second resource based on the frequency domain indication information, respectively.
Further, the second resource may be used to send the initial transmission data or the nth retransmission data, and the first resource may be used to send the (n + 1) th retransmission resource, where n is greater than or equal to 1.
Further, the first resource may be transmitted by a UE (hereinafter, referred to as a transmitting UE) as a transmitting end in response to receiving HARQ-Negative ACKnowledgement (NACK) information transmitted by the UE, so as to retransmit the same data previously transmitted using the second resource using the first resource.
In one embodiment, the time domain indication information may include: a time domain interval, which is a time interval between a time domain position of the first resource and a time domain position of the second resource.
In particular, the time domain position may comprise a time domain start position and/or a time domain end position. In other words, the time domain interval may be a time interval of a slot position of the start or end of the current psch transmission scheduled by the SCI received in step S101 and a slot position of the start or end of the previous psch transmission corresponding to the TB transmitted by the psch transmission.
For example, the time interval may be a time interval between a time domain starting position of the first resource and a time domain starting position of the second resource.
For another example, the time interval may be a time interval between a time domain start position of the first resource and a time domain end position of the second resource.
For another example, the time interval may be a time interval between a time domain end position of the first resource and a time domain start position of the second resource.
For another example, the time interval may be a time interval between a time domain end position of the first resource and a time domain end position of the second resource.
For another example, the time interval may also indicate a time interval between the time domain starting position of the first resource and the time domain starting position of the second resource, and a time interval between the time domain ending position of the first resource and the time domain starting position of the second resource.
In practical applications, it may be determined by a protocol to specify, configure or configure the start and end positions of the time interval to adopt the time domain start position or the time domain end position of the resource.
Accordingly, the step S102 may include the steps of: and determining the time domain position of the second resource according to the time domain interval and the time domain position of the first resource.
In this example, the time domain interval may be directly indicated in the SCI by time domain indication information. Correspondingly, in response to receiving the SCI, the receiving UE may directly determine the time domain interval according to the time domain indication information included in the SCI, and further determine the time domain position of the second resource according to the time domain interval and the time domain position of the first resource received this time.
Further, the time domain interval included in the time domain indication information may be a value selected from a preset time domain interval set, and the preset time domain interval set may be determined by a configuration or a pre-configuration manner.
For example, the determining by way of configuration means: the indication is performed through downlink signaling (e.g., RRC signaling) previously sent by the base station.
For another example, the determining by the preconfigured means may include: the UE is preset in a Subscriber Identity Module (SIM) card associated with the UE.
Specifically, the base station may indicate the preset time domain interval set to the receiving UE in a configuration manner, and indicate one value in the preset time domain interval set in the current SCI as the current time domain interval. In response to receiving the SCI, the receiving UE may determine the time domain position of the second resource according to the time domain interval and the time domain position of the currently received first resource.
In another embodiment, the time domain indication information may include: an index of a time domain interval, where the time domain interval may be a time interval between a time domain position of the first resource and a time domain position of the second resource, and an association relationship between the time domain interval and the index may be determined in a configured or preconfigured manner.
Accordingly, referring to fig. 2, the step S102 may include the steps of:
step S1021, determining a corresponding time domain interval according to the index of the time domain interval and the incidence relation;
step S1022, determining the time domain position of the second resource according to the determined time domain interval and the time domain position of the first resource.
Therefore, the signaling overhead of the SCI can be saved, and the time interval between the time domain position of the current transmission and the time domain position of the previous transmission of the same TB can be accurately indicated, so that the UE can accurately determine the time domain position of the second resource.
For example, in conjunction with fig. 2-4, assuming that the layer-1 Source identity (Source Identification, Source ID) of UE1 is the same as the layer-1 Source identity of UE3, and is 00001100, this value may be taken from the layer-2 Source identities of UE1 and UE3, respectively. Similarly, assuming that the layer-1 Destination identity (Destination Identification, Destination ID) of UE2 and the layer-1 Destination identity of UE4 are the same and are 11100001, the values may be taken from the layer-2 Destination identities of UE2 and UE4, respectively.
In this example, UE1 is in unicast communication with UE2, and UE3 is in unicast communication with UE 4. Since UE2 and UE4 are close in distance, both can receive data transmitted by UE1 and UE 3.
With reference to fig. 3 and 4, UE1 as the transmitting UE transmits TB1 through a secondary link Physical layer data Channel (psch), which is abbreviated as a secondary link data Channel, at a time slot n (slot n), and UE3 as the transmitting UE also transmits TB2 through the psch at the time slot n.
It is assumed that the SCIs transmitted by the UE1 and the UE3 each include 2 bits of time domain indication information. The time domain interval included in the time domain indication information may be a preset time domain interval set {3,4,5,6} configured by the base station.
For example, when the time domain indication information is 00, it indicates that the time domain interval is 3 slots; when the time domain indication information is 01, indicating that the time domain interval is 4 time slots; when the time domain indication information is 10, indicating that the time domain interval is 5 time slots; when the time domain indication information is 11, indicating that the time domain interval is 6 time slots;
when the value of a New Data Indicator (NDI) in the SCI is 0, it indicates that the transmission is an initial transmission, and the time domain indication information has no meaning. And when the numerical value of the NDI is 1, the transmission is indicated as retransmission, and the time domain indication information has meaning.
The UE2 and the UE4 receive the same data (i.e., TB1 and TB2) for the two layer-1 source id and layer-1 destination id in the slot n, respectively, and the UE2 and the UE4 decode the data respectively but fail to decode the data. Therefore, the UE2 and the UE4 respectively feed back HARQ-NACK using corresponding Feedback resources on a secondary link Physical layer Feedback Channel (PSFCH, which may be referred to as a secondary link Feedback Channel).
And after receiving the HARQ-NACK on the corresponding feedback resources, the UE1 and the UE3 respectively carry out retransmission.
It is assumed that the time domain indication information in the SCI corresponding to the first retransmission TB1 sent by the UE1 is 01, which indicates that the time domain interval between the first retransmission TB1 and the first transmission TB1 is 4 slots.
It is assumed that the time domain indication information in the SCI corresponding to the first retransmission TB2 sent by the UE3 is 00, which indicates that the time domain interval between the first retransmission TB2 and the first transmission TB2 is 3 slots.
Therefore, when the UE2 and the UE4 receive two first retransmission data (i.e., the first retransmission TB1 and the first retransmission TB2), the time domain position of the first transmission data corresponding to each retransmission data can be determined according to the time domain indication information. And then, determining the frequency domain position of the initial transmission data corresponding to each retransmission data by combining the frequency domain indication information, and determining the previous TB corresponding to the TB received this time by backward extrapolation from a two-dimensional angle constructed by the time domain and the frequency domain, thereby successfully realizing the HARQ combined decoding of the same TB.
Taking the UE2 as an example, in response to the SCI corresponding to the retransmission TB received in the slot n +4, the UE2 may determine that the TB received this time is 4 slots away from the time domain of the last transmission according to the time domain indication information in the SCI. Referring to fig. 4, since the TB is received in the slot n +4, it can be determined that the previous TB corresponding to the TB received in the slot n +4 is the TB located in the slot n. In fact, the UE2 received the first retransmission TB1 in the slot n +4, but for the UE2 as the receiving UE, it is not known whether it is the TB1 or the TB2 at the time of receiving the TB, so that it needs to be effectively distinguished by the time domain indication information and the frequency domain indication information by using the scheme described in the present embodiment.
Similarly, in response to the SCI corresponding to the retransmission TB received in the slot n +3, the UE2 may determine that the TB received this time is 3 slots away from the time domain of the last transmission according to the time domain indication information in the SCI. With reference to fig. 4, since the TB is received in the slot n +3, it can be determined that the previous TB corresponding to the retransmitted TB received in the slot n +3 is the TB located in the slot n.
Therefore, the UE2 and the UE4 as receiving UEs can determine the relative time domain position of the TB transmitted by the previous psch transmission corresponding to the TB carried by the PSSCH scheduled by the current SCI based on the time domain indication information in the currently received SCI, and then the specific process of determining the relative frequency domain position of the previous TB corresponding to the currently received TB by the UE2 and the UE4 according to the frequency domain indication information in the SCI will be described in detail. After the relative time domain position and the relative frequency domain position of the previous TB corresponding to the current TB are determined, the previous TB corresponding to the current TB can be uniquely determined from a two-dimensional angle constructed by the time domain and the frequency domain. In the scenario illustrated in fig. 4, the UE2 and the UE4 can determine that the previous TB corresponding to the first retransmission TB2 received in the slot n +3 is the initial transmission TB2 received in the slot n, and also determine that the previous TB corresponding to the first retransmission TB1 received in the slot n +4 is the initial transmission TB1 received in the slot n.
In one embodiment, the frequency domain indication information may include: a frequency domain interval, the frequency domain interval being an interval of a frequency domain position of the first resource and a frequency domain position of the second resource.
In particular, the frequency domain position may comprise a frequency domain start position and/or a frequency domain end position.
For example, the frequency domain interval may be a time interval between a frequency domain starting position of the first resource and a frequency domain starting position of the second resource.
For another example, the frequency domain interval may be a time interval between a frequency domain end position of the first resource and a frequency domain end position of the second resource.
In practical applications, it may be determined by a protocol, configuration, or a combination thereof that the start and end positions of the frequency domain interval adopt the frequency domain start position or the frequency domain end position of the resource.
Accordingly, with continued reference to fig. 2, the step S102 may further include: step S1023, determining the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource.
Therefore, the UE can accurately determine the frequency domain position of the second resource by indicating the interval between the frequency domain position of the current transmission and the frequency domain position of the previous transmission of the same TB.
In this example, the frequency domain indication information may be directly indicated in the SCI to directly indicate the frequency domain interval. In response to receiving the SCI, the receiving UE may directly determine the frequency domain interval according to the frequency domain indication information included in the SCI, and further determine the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource received this time.
Further, the frequency domain interval included in the frequency domain indication information may be a value selected from a preset frequency domain interval set, and the preset frequency domain interval set may be determined in a configuration or pre-configuration manner.
Specifically, the base station may indicate the preset frequency domain interval set to the receiving UE in a configuration manner, and indicate one value in the preset frequency domain interval set in the current SCI as the current frequency domain interval. In response to receiving the SCI, the receiving UE may determine the frequency domain location of the second resource according to the frequency domain interval and the frequency domain location of the currently received first resource.
In another embodiment, the frequency domain indication information may include: the index of the frequency domain interval, and the association relationship between the frequency domain interval and the index can be determined in a configured or pre-configured manner.
In yet another embodiment, the frequency domain indication information may include: a first relative position, the first relative position being a relative position of a frequency domain position of the second resource with respect to a frequency domain position of the first resource. In other words, the first relative position may be used to indicate a relative frequency domain position of a previous psch transmission corresponding to a TB sent by the psch scheduled this time in step S101.
For example, the first relative position may be a relative position of a frequency domain starting position of the second resource with respect to a frequency domain starting position of the first resource.
For another example, the first relative position may be a relative position of a frequency domain end position of the second resource with respect to a frequency domain start position of the first resource.
Accordingly, the step S1023 can be replaced by: and determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource.
In a typical application scenario, the first relative position may be used to indicate: and the size relationship between the RB index or the sub-channel index corresponding to the frequency domain position of the second resource and the RB index or the sub-channel index corresponding to the frequency domain position of the first resource.
Correspondingly, the determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource may include: and determining that the frequency domain position of the second resource is above or below the frequency domain position of the first resource according to the size relation in the frequency domain.
For example, when the size relationship is that the frequency domain position of the second resource is located above the frequency domain position of the first resource in the frequency domain, it may mean that the frequency corresponding to the frequency domain starting position (or the frequency domain ending position) of the second resource is greater than the frequency corresponding to the frequency domain starting position (or the frequency domain ending position) of the first resource in the frequency domain.
For another example, when the size relationship is that the frequency domain position of the second resource is located below the frequency domain position of the first resource in the frequency domain, it may mean that the frequency corresponding to the frequency domain starting position (or the frequency domain ending position) of the second resource is smaller than the frequency corresponding to the frequency domain starting position (or the frequency domain ending position) of the first resource in the frequency domain.
Still taking the scenarios shown in fig. 3 and fig. 4 as an example, it can be determined through the time domain indication information in the SCI: the TB received at slot n +3 corresponds to the TB transmitted at slot n, and the TB received at slot n +4 corresponds to the TB transmitted at slot n.
Next, taking the UE2 as an example, a process of determining the TBs of the slot n corresponding to the TBs received in the slot n +3 and the slot n +4, respectively, based on the frequency domain indication information in the SCI will be described in detail.
The frequency domain indication information is assumed to be 1 bit. When the numerical value of the frequency domain indication information is 0, the RB index or the subchannel (subchannel) index corresponding to the frequency domain starting position of the previous PSSCH transmission is smaller than the RB index or the subchannel index corresponding to the frequency domain starting position of the current PSSCH; when the value of the frequency domain indication information is 1, it indicates that an RB index or a subchannel (subchannel) index corresponding to a frequency domain starting position of a previous psch transmission is greater than an RB index or a subchannel index corresponding to a frequency domain starting position of a current psch.
It is assumed that the frequency domain indication information in the SCI corresponding to the first retransmission TB1 sent by the UE1 is 1, which indicates that the RB index corresponding to the frequency domain starting position of the first retransmission TB1 is greater than the RB index corresponding to the frequency domain starting position of the first retransmission.
It is assumed that the frequency domain indication information in the SCI corresponding to the first retransmission TB2 sent by the UE3 is 0, which indicates that the RB index corresponding to the frequency domain starting position of the first retransmission TB2 is smaller than the RB index corresponding to the frequency domain starting position of the first retransmission.
Therefore, for the UE2, in response to the SCI corresponding to the retransmitted TB received in the slot n +3, it may be determined according to the frequency domain indication information with a value of 0, that the RB index corresponding to the frequency domain starting position of the primary TB is smaller than the RB index corresponding to the frequency domain starting position of the first retransmitted TB. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +3 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +3 is actually the primary retransmitted TB2 according to the determined size relationship, and the previous transmission corresponding to the TB is the primary transmitted TB 2.
Similarly, in response to the SCI corresponding to the retransmitted TB received in the slot n +4, it may be determined according to the frequency domain indication information with a value of 1, where the RB index corresponding to the frequency domain starting position of the initially transmitted TB is greater than the RB index corresponding to the frequency domain starting position of the first retransmitted TB. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +4 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +4 is actually the primary retransmitted TB1 according to the determined size relationship, and the previous transmission corresponding to the TB is the primary transmitted TB 1.
Thus, under the mutual coordination of the time domain indication information and the frequency domain indication information, when the layer-1 source identifier and the layer-1 destination identifier of different UEs (corresponding to UE1 and UE3, UE2 and UE4 shown in fig. 3) collide, the time-frequency domain position of the second resource transmitted by the previous PSSCH transmission corresponding to the first resource transmitted by the PSSCH transmission of the current SCI scheduling can be effectively identified. In fig. 4, the first and second resources are characterized by TBs.
Thus, with continued reference to fig. 3 and fig. 4, when receiving two first retransmission data, UE2 and UE4 may determine the initial transmission data corresponding to each retransmission data according to the time domain indication information and the frequency domain indication information, and further perform HARQ combining and decoding on multiple transmissions of the same TB.
Similarly, the combination of the second retransmission and the first retransmission and the decoding result of the first transmission can also be realized.
Accordingly, when the UE2 or UE4 decodes correctly, HARQ-NACK is not fed back any more, but the decoding result is transmitted to layer-2 of the UE, and it is finally determined whether the TB is self-owned according to the complete layer-2 identifier at layer-2.
In another exemplary application scenario, the preset frequency domain partition may refer to: and on the frequency domain, dividing a PSSCH transmission resource pool or a frequency domain partition obtained by BWP according to a preset interval. For example, referring to fig. 5, the psch transmission resource pool may be equally divided into 4 frequency domain partitions (corresponding to partition 1 through partition 4 in the figure). Similarly, referring to fig. 6, the partial Bandwidth (BWP) may be equally divided into 4 frequency domain partitions (corresponding to partition 1 to partition 4 in the figure).
In the scenarios shown in fig. 5 and fig. 6, the time domain positions of the primary transmission TB1, the primary retransmission TB1, the secondary retransmission TB1, the primary transmission TB2, the primary retransmission TB2, and the secondary retransmission TB2 in the time domain are the same as the time domain positions of the respective TBs in the scenario shown in fig. 4, so that the time domain indication information is not changed, and a specific process of how to determine the time domain position of the primary transmission TB corresponding to the respective retransmission TB according to the time domain indication information is not repeated in this scenario.
The scheme in this scenario only specifically explains how to determine the frequency domain position of the primary transmission TB corresponding to each retransmission TB according to the preset frequency domain partition indicated by the frequency domain indication information.
Further, the frequency domain indication information may include: a second relative position, which may be used to indicate a preset frequency domain partition to which the frequency domain position of the second resource belongs.
For example, the second relative position may be used to indicate a preset frequency domain partition to which a frequency domain starting position of the second resource belongs.
For another example, the second relative position may be used to indicate a preset frequency domain partition to which the frequency domain end position of the second resource belongs.
In practical applications, whether the second relative position indication is the frequency domain start position or the preset frequency domain partition to which the frequency domain end position of the second resource belongs may be determined by a protocol specification, configuration or configuration.
Accordingly, the step S1023 can be replaced by: determining a relative position of the frequency domain position of the second resource within the PSSCH transmission resource pool or BWP based on the second relative position.
Taking the scenarios shown in fig. 3 and fig. 5 as an example, it can be determined through the time domain indication information in the SCI: the TB received at slot n +3 corresponds to the TB transmitted at slot n, and the TB received at slot n +4 corresponds to the TB transmitted at slot n.
Next, taking the UE2 as an example, the process of determining the TBs of the slot n corresponding to the TBs received in the slot n +3 and the slot n +4 respectively based on the second relative position indicated by the frequency domain indication information in the SCI will be described in detail.
Assuming that the frequency domain indication information is log2M bits, where M is the number of preset frequency domain partitions.
With particular reference to the scenario of FIG. 5, the second relative position of the frequency domain indication information is log24-2 bits.
When the second relative position of the frequency domain indication information is 00, it indicates that the frequency domain starting position of the previous psch transmission is located in the first part of the psch transmission resource pool (corresponding to partition 1 of the 4 frequency domain partitions in fig. 5).
When the second relative position of the frequency domain indication information is 01, it indicates that the frequency domain starting position of the previous psch transmission is located in the second part of the psch transmission resource pool (corresponding to partition 2 of the 4 frequency domain partitions in fig. 5).
When the second relative position of the frequency domain indication information is 10, it indicates that the frequency domain starting position of the previous psch transmission is located in the third part of the psch transmission resource pool (corresponding to partition 3 of the 4 frequency domain partitions in fig. 5).
When the second relative position of the frequency domain indication information is 11, it indicates that the frequency domain starting position of the previous psch transmission is located in the fourth part of the psch transmission resource pool (corresponding to partition 4 of the 4 frequency domain partitions in fig. 5).
Assuming that the second relative position of the frequency domain indication information in the SCI corresponding to the first retransmission TB1 sent by the UE1 is 01, it indicates that the frequency domain starting position of the initial transmission TB1 is located in the second part of the PSSCH transmission resource pool, i.e., partition 2 in fig. 5.
Assuming that the second relative position of the frequency domain indication information in the SCI corresponding to the first retransmission TB2 sent by the UE3 is 00, it indicates that the frequency domain starting position of the initial transmission TB2 is located in the first part of the PSSCH transmission resource pool, i.e., partition 1 in fig. 5.
Therefore, for the UE2, in response to the SCI corresponding to the retransmitted TB received in the time slot n +3, it may be determined that the frequency domain starting position of the primary TB is located in partition 1 according to the frequency domain indication information with a value of 00. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +3 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +3 is actually the primary retransmitted TB2 according to the determined frequency domain range information of the partition 1, and the previous transmission corresponding to the TB is the primary transmitted TB 2.
Similarly, in response to the SCI corresponding to the retransmitted TB received in the time slot n +4, the frequency domain starting position of the primary TB may be located in the partition 2 according to the frequency domain indication information with a value of 01. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +4 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +4 is actually the primary retransmitted TB1 according to the determined frequency domain range information of the partition 2, and the previous transmission corresponding to the TB is the primary transmitted TB 1.
Taking the scenarios shown in fig. 3 and fig. 6 as an example, it can be determined through the time domain indication information in the SCI: the TB received at slot n +3 corresponds to the TB transmitted at slot n, and the TB received at slot n +4 corresponds to the TB transmitted at slot n.
Next, taking the UE2 as an example, the process of determining the TBs of the slot n corresponding to the TBs received in the slot n +3 and the slot n +4 respectively based on the second relative position indicated by the frequency domain indication information in the SCI will be described in detail.
Assuming that the frequency domain indication information is log2M bits, where M is the number of preset frequency domain partitions.
With particular reference to the scenario of FIG. 6, the second relative position of the frequency domain indication informationIs set as log24-2 bits.
When the second relative position of the frequency domain indication information is 00, it indicates that the frequency domain start position of the previous pscch transmission is located in the first portion of BWP (corresponding to partition 1 of the 4 frequency domain partitions in fig. 5). Wherein BWP is a secondary link BWP
When the second relative position of the frequency domain indication information is 01, it indicates that the frequency domain start position of the previous pscch transmission is located in the second portion of BWP (corresponding to partition 2 of the 4 frequency domain partitions in fig. 5).
When the second relative position of the frequency domain indication information is 10, it indicates that the frequency domain start position of the previous pscch transmission is located in the third portion of BWP (corresponding to partition 3 of the 4 frequency domain partitions in fig. 5).
When the second relative position of the frequency domain indication information is 11, it indicates that the frequency domain starting position of the previous pscch transmission is located in the fourth part of BWP (corresponding to partition 4 of the 4 frequency domain partitions in fig. 5).
Assuming that the second relative position of the frequency domain indication information in the SCI corresponding to the first retransmission TB1 sent by the UE1 is 01, it indicates that the frequency domain starting position of the first retransmission TB1 is located in the second part of BWP, i.e., partition 2 in fig. 6.
Assuming that the second relative position of the frequency domain indication information in the SCI corresponding to the first retransmission TB2 sent by the UE3 is 00, it indicates that the frequency domain starting position of the first retransmission TB2 is located in the first part of BWP, i.e. partition 1 in fig. 6.
Therefore, for the UE2, in response to the SCI corresponding to the retransmitted TB received in the time slot n +3, it may be determined that the frequency domain starting position of the primary TB is located in partition 1 according to the frequency domain indication information with a value of 00. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +3 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +3 is actually the primary retransmitted TB2 according to the determined frequency domain range information of the partition 1, and the previous transmission corresponding to the TB is the primary transmitted TB 2.
Similarly, in response to the SCI corresponding to the retransmitted TB received in the time slot n +4, the frequency domain starting position of the primary TB may be located in the partition 2 according to the frequency domain indication information with a value of 01. Therefore, on the basis of previously determining that the retransmitted TB received by the slot n +4 corresponds to the primary transmitted TB received by the slot n based on the time domain indication information, it may be further determined that the retransmitted TB received by the slot n +4 is actually the primary retransmitted TB1 according to the determined frequency domain range information of the partition 2, and the previous transmission corresponding to the TB is the primary transmitted TB 1.
In particular, at least one PSSCH transmission resource pool may be contained within a single BWP.
Further, the PSSCH transmission resource pool can include a PSSCH transmission resource pool.
Therefore, by adopting the scheme of the embodiment of the invention, the resource utilization rate can be improved, and simultaneously, the link can be effectively distinguished when the layer-1 source identifiers and the layer-1 target identifiers of a plurality of UE collide, thereby greatly improving the success rate of HARQ combination. Specifically, based on the time domain indication information and the frequency domain indication information, the relative time-frequency domain position of the previous transmission (corresponding to the second resource) relative to the current transmission (corresponding to the first resource) of the same TB can be indicated by the SCI, so that when the layer-1 source identifier and the layer-1 destination identifier collide, the time-frequency domain position of the previous transmission, which belongs to the same TB as the TB currently transmitted TB, can still be determined according to the relative time-frequency domain position indicated by the SCI. Therefore, the combination of the previous decoding result of the same TB and the decoding result of the current transmission becomes possible, and the HARQ combination can still be successfully completed when the collision occurs between the layer-1 source identifier and the layer-1 destination identifier.
In a variation of this embodiment, the step of determining the time domain position of the second resource based on the time domain indication information and the step of determining the frequency domain position of the second resource based on the frequency domain indication information may be performed synchronously or asynchronously. When the two execution steps are executed asynchronously, the execution sequence of the two execution steps can be interchanged. For example, referring to fig. 2, the step S1023 may be performed before the steps S1021 and S1022.
Fig. 7 is a schematic structural diagram of an apparatus for determining a time-frequency location of a resource according to an embodiment of the present invention. Those skilled in the art understand that the determining device 7 for time-frequency location of resources (which may be simply referred to as the determining device 7) in this embodiment may be used to implement the technical solutions of the methods described in the embodiments shown in fig. 1 to fig. 6.
Specifically, in this embodiment, the determining device 7 may include: a receiving module 71, configured to receive auxiliary link control information, where the auxiliary link control information includes time domain indication information and frequency domain indication information; a determining module 72, configured to determine, according to the time domain indication information, the frequency domain indication information, and a first resource, a time-frequency position of a second resource, where the first resource is a resource sent by a current psch transmission scheduled by the secondary link control information, and the second resource is a resource sent by a previous psch transmission corresponding to a TB carried by a psch transmitted by the first resource; wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain; the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
In one embodiment, the time domain indication information may include: a time domain interval, the time domain interval being a time interval of a time domain position of the first resource and a time domain position of the second resource; the determining module 72 may include: a first determining submodule 721 is configured to determine the time domain position of the second resource according to the time domain interval and the time domain position of the first resource.
Further, the time domain interval included in the time domain indication information may be a value selected from a preset time domain interval set, and the preset time domain interval set may be determined by a configuration or a pre-configuration manner.
In one embodiment, the time domain indication information may include: an index of a time domain interval, where the time domain interval is a time interval between a time domain position of the first resource and a time domain position of the second resource, and an association relationship between the time domain interval and the index may be determined in a configured or preconfigured manner; the determining module 72 may include: the second determining submodule 722 is configured to determine a corresponding time domain interval according to the index of the time domain interval and the association relationship; and determining the time domain position of the second resource according to the determined time domain interval and the time domain position of the first resource.
In one embodiment, the frequency domain indication information may include: a frequency domain interval, the frequency domain interval being an interval of a frequency domain position of the first resource and a frequency domain position of the second resource; the determining module 72 may include: a third determining submodule 723, configured to determine the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource.
In one embodiment, the frequency domain indication information may include: a first relative position, the first relative position being a relative position of a frequency domain position of the second resource with respect to a frequency domain position of the first resource; the determining module 72 may include: a fourth determining submodule 724 is configured to determine the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource.
Further, the first relative position may be used to indicate: the fourth determining submodule 724 may include a size relationship between an RB index or a subchannel index corresponding to the frequency-domain position of the second resource and an RB index or a subchannel index corresponding to the frequency-domain position of the first resource: a determining unit 7241, configured to determine, in the frequency domain, that the frequency domain position of the second resource is located above or below the frequency domain position of the first resource according to the size relationship.
In one embodiment, the preset frequency domain partition may refer to: on a frequency domain, dividing a PSSCH transmission resource pool or a frequency domain partition obtained by BWP according to a preset interval; the frequency domain indication information may include: a second relative position, configured to indicate a preset frequency domain partition to which the frequency domain position of the second resource belongs; the determining module 72 may include: a fifth determining sub-module 725 for determining the relative position of the frequency domain position of the second resource within the pscch transmission resource pool or BWP based on the second relative position.
In one embodiment, the second resource may be used to transmit initial transmission data or nth retransmission data, and the first resource may be used to transmit n +1 th retransmission resource, where n ≧ 1.
In one embodiment, the time-frequency location may include: a time domain location; a frequency domain location; the time domain position may include a time domain start position or a time domain end position, and the frequency domain position may include a frequency domain start position or a frequency domain end position.
For more details of the operation principle and the operation mode of the determining device 7, reference may be made to the related descriptions in fig. 1 to fig. 6, which are not described herein again.
Further, the embodiment of the present invention further discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solution described in the embodiments shown in fig. 1 to fig. 6 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The storage medium may include ROM, RAM, magnetic or optical disks, etc.
Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the method technical solution described in the embodiments shown in fig. 1 to 6 when running the computer instruction. Preferably, the terminal may be a User Equipment (UE) applied to the NR V2X scenario. Such as a UE that is the receiving end in a NR V2X unicast or multicast scenario.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (13)

1. A method for determining time-frequency position of resource is characterized by comprising the following steps:
receiving auxiliary link control information, wherein the auxiliary link control information comprises time domain indication information and frequency domain indication information;
determining a time-frequency position of a second resource according to the time domain indication information, the frequency domain indication information and a first resource, wherein the first resource is a resource transmitted by PSSCH transmission of this time scheduled by the secondary link control information, and the second resource is a resource transmitted by PSSCH transmission of the previous time corresponding to a TB carried by PSSCH of the first resource transmission;
wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain;
the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
2. The method of claim 1, wherein the time domain indication information comprises: a time domain interval, the time domain interval being a time interval of a time domain position of the first resource and a time domain position of the second resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes:
and determining the time domain position of the second resource according to the time domain interval and the time domain position of the first resource.
3. The method according to claim 2, wherein the time domain indication information includes a time domain interval value selected from a preset time domain interval set, and the preset time domain interval set is determined by configuration or pre-configuration.
4. The method of claim 1, wherein the time domain indication information comprises: an index of a time domain interval, where the time domain interval is a time interval between a time domain position of the first resource and a time domain position of the second resource, and an association relationship between the time domain interval and the index is determined in a configuration or pre-configuration manner; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes:
determining a corresponding time domain interval according to the index of the time domain interval and the incidence relation;
and determining the time domain position of the second resource according to the determined time domain interval and the time domain position of the first resource.
5. The determination method according to claim 1, wherein the frequency domain indication information comprises: a frequency domain interval, the frequency domain interval being an interval of a frequency domain position of the first resource and a frequency domain position of the second resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes:
and determining the frequency domain position of the second resource according to the frequency domain interval and the frequency domain position of the first resource.
6. The determination method according to claim 1, wherein the frequency domain indication information comprises: a first relative position, the first relative position being a relative position of a frequency domain position of the second resource with respect to a frequency domain position of the first resource; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes:
and determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource.
7. The determination method according to claim 6, wherein the first relative position is used to indicate that: determining the frequency domain position of the second resource according to the first relative position and the frequency domain position of the first resource includes:
and determining that the frequency domain position of the second resource is above or below the frequency domain position of the first resource according to the size relation in the frequency domain.
8. The method according to claim 1, wherein the predetermined frequency domain partition is: on a frequency domain, dividing a PSSCH transmission resource pool or a frequency domain partition obtained by BWP according to a preset interval; the frequency domain indication information includes: a second relative position, configured to indicate a preset frequency domain partition to which the frequency domain position of the second resource belongs; the determining the time-frequency position of the second resource according to the time domain indication information, the frequency domain indication information and the first resource includes:
determining a relative position of the frequency domain position of the second resource within the PSSCH transmission resource pool or BWP based on the second relative position.
9. The method of claim 1, wherein the second resource is used for transmitting initial transmission data or n-th retransmission data, and the first resource is used for transmitting n + 1-th retransmission resource, where n ≧ 1.
10. The determination method according to any of claims 1 to 9, wherein the time-frequency location comprises: a time domain location; a frequency domain location; the time domain position comprises a time domain starting position or a time domain ending position, and the frequency domain position comprises a frequency domain starting position or a frequency domain ending position.
11. An apparatus for determining a time-frequency location of a resource, comprising:
a receiving module, configured to receive auxiliary link control information, where the auxiliary link control information includes time domain indication information and frequency domain indication information;
a determining module, configured to determine, according to the time domain indication information, the frequency domain indication information, and a first resource, a time-frequency position of a second resource, where the first resource is a resource sent by a current PSSCH transmission scheduled by the secondary link control information, and the second resource is a resource sent by a previous PSSCH transmission corresponding to a TB carried by a PSSCH transmitted by the first resource;
wherein the time domain indication information is used for indicating the deviation of the first resource and the second resource in the time domain;
the frequency domain indication information is used to indicate a deviation of the first resource from the second resource in a frequency domain, or is used to indicate a preset frequency domain partition to which the second resource belongs.
12. A storage medium having stored thereon computer instructions, wherein said computer instructions when executed perform the steps of the method of any of claims 1 to 10.
13. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 10.
CN201910247850.4A 2019-03-29 2019-03-29 Method and device for determining time-frequency position of resource, storage medium and terminal Active CN111294167B (en)

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