CN117501647A

CN117501647A - Methods, apparatuses, and computer readable media for autonomous retransmission

Info

Publication number: CN117501647A
Application number: CN202180099226.XA
Authority: CN
Inventors: 郭平恒; R·玛尔多纳多; 李泽宪; 陶涛
Original assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Current assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2024-02-02
Also published as: WO2022257104A1

Abstract

A method for autonomous retransmission process is disclosed. An example method may include: performing initial transmission of a transport block on an initially configured grant resource, and starting a configured grant retransmission timer having a first value when the initial transmission is performed; selecting a plurality of configured grant resources based on at least one criterion related to the selection of the configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having a first value; and performing at least one retransmission of the transport block on the selected plurality of configured grant resources. Related apparatus and computer readable media are also disclosed.

Description

Methods, apparatuses, and computer readable media for autonomous retransmission

Technical Field

Various embodiments relate to methods, apparatuses, and computer-readable media for autonomous retransmission.

Background

When a User Equipment (UE) performs transmission of a Transport Block (TB) on a Configured Grant (CG) Physical Uplink Shared Channel (PUSCH), the UE may start a CG retransmission timer (CGRT). In case the UE does not receive Downlink Feedback Information (DFI) indicating a hybrid automatic repeat request (HARQ) process state before the CGRT expires, the UE may select another CG occasion and autonomously transmit the same TB again once the CGRT expires, because, for example, the Base Station (BS) may not receive the TB due to, for example, interference on an unlicensed band, or may not transmit the CG DFI due to Listen Before Talk (LBT) failure. This process may continue until the CG timer also expires, causing the TB to be cleared from the HARQ buffer. In case the delivery deadline is reached before the UE can attempt autonomous retransmission, for example if the first autonomous retransmission fails, the data in the second TB may not be delivered on time.

Disclosure of Invention

The following presents a simplified summary of example embodiments in order to provide a basic understanding of some aspects of various embodiments. It should be noted that this summary is not intended to identify key features of the essential elements or to define the scope of the embodiments, and its sole purpose is to introduce some concepts in a simplified form as a prelude to the more detailed description that is provided below.

In a first aspect, a method is disclosed. The method may include: performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed; selecting a plurality of configured grant resources based on at least one criterion related to the selection of the configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having a first value; and performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

In some embodiments, the at least one criterion may be related to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration.

In some embodiments, the at least one criterion, the configured number of authorized resources, and/or the configured authorized retransmission timer may be configured by a network device.

In some embodiments, at least one of the selected plurality of configured grant resources and the initially configured grant resources may have decorrelated channel characteristics.

In some embodiments, the selected plurality of configured grant resources may have decorrelated channel characteristics.

In some embodiments, the selected plurality of configured grant resources may be associated with the same identifier of the hybrid automatic repeat request process.

In some embodiments, the method may further comprise selecting the same identifier of the hybrid automatic repeat request process for the selected plurality of configured grant resources.

In some embodiments, the method may further include restarting the configured grant retransmission timer with a second value after performing the at least one retransmission, and the second value may be equal to or less than the first value.

In some embodiments, the method may further comprise restarting the configured grant retransmission timer with a third value after performing the at least one retransmission, and the third value may be less than the first value, if the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources.

In some embodiments, the selecting the plurality of configured authorized resources may include: one configured grant resource is selected based on the at least one criterion, and in the event that the one configured grant resource is selected for the at least one retransmission, the at least one retransmission may be performed on the selected one configured grant resource.

In a second aspect, a method is disclosed. The method may comprise configuring at least one criterion related to a selection of configured grant resources, a number of said configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value, and transmitting a configuration of said at least one criterion, a number of said configured grant resources, and/or a configuration of said configured grant retransmission timer.

In some embodiments, the at least one value may include a first value, and when an initial transmission of the transport block is performed on an initially configured grant resource, a configured grant retransmission timer having the first value may be started.

In some embodiments, the at least one retransmission may be performed on the plurality of configured grant resources selected based on the at least one criterion.

In some embodiments, the at least one value may further include a second value, the configured grant retransmission timer having the second value may be restarted after the at least one retransmission is performed, and the second value may be equal to or less than the first value.

In some embodiments, the at least one value may further include a third value, which may be less than the first value, and in the event that the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources, the configured grant retransmission timer with the third value may be restarted after performing at least one retransmission.

In some embodiments, the at least one retransmission may be performed on the one configured grant resource in case the one configured grant resource for the at least one retransmission is selected in the configured grant resource selection.

In a third aspect, an apparatus is disclosed. The apparatus may include at least one processor and at least one memory. The at least one memory may include computer program code, and the at least one memory and the computer program code may be configured, with the at least one processor, to cause the apparatus to perform: performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed; selecting a plurality of configured grant resources based on at least one criterion related to the selection of configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having the first value; and performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

In some embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform: the same identifier selected by the hybrid automatic repeat request process is selected for the selected plurality of configured grant resources.

In some embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform: after performing the at least one retransmission, restarting the configured grant retransmission timer with a second value, and the second value may be equal to or less than the first value.

In some embodiments, the at least one memory and the computer program code may also be configured to, with the at least one processor, cause the apparatus to further perform: in case the number of the selected plurality of configured grant resources is smaller than the configured or preconfigured number of the configured grant resources, after performing at least one retransmission, restarting the configured grant retransmission timer with a third value, and the third value may be smaller than the first value.

In some embodiments, the selecting the plurality of configured grant resources may include selecting one configured grant resource based on the at least one criterion, and in the event that the one configured grant resource for the at least one retransmission is selected, the at least one retransmission may be performed on the selected one configured grant resource.

In a fourth aspect, an apparatus is disclosed. The apparatus may include at least one processor and at least one memory. The at least one memory may include computer program code, and the at least one memory and the computer program code may be configured, with the at least one processor, to cause the apparatus to perform: configuring at least one criterion related to the selection of configured grant resources, the number of configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value, and transmitting the configuration of the at least one criterion, the number of configured grant resources, and/or the configuration of the configured grant retransmission timer.

In some embodiments, the at least one value may further include a third value, the configured grant retransmission timer having the third value may be restarted after performing the at least one retransmission in a case where the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources, and the third value may be less than the first value.

In some embodiments, at least one retransmission may be performed on the one configured grant resource in case the one configured grant resource for the at least one retransmission is selected in the configured grant resource selection.

In a fifth aspect, an apparatus is disclosed. The apparatus may include: means for performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed; means for selecting a plurality of configured grant resources based on at least one criterion related to the selection of configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having the first value; and means for performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

In some embodiments, the apparatus may further comprise: means for selecting the same identifier of the hybrid automatic repeat request process for the selected plurality of configured grant resources.

In some embodiments, the apparatus may further comprise: means for restarting the configured grant retransmission timer with a second value after performing the at least one retransmission, and the second value may be equal to or less than the first value.

In some embodiments, the apparatus may further comprise means for restarting the configured grant retransmission timer with a third value after performing the at least one retransmission, and the third value may be less than the first value, if the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources.

In some embodiments, the means for selecting a plurality of configured grant resources may comprise means for selecting one configured grant resource based on the at least one criterion, and in case the one configured grant resource for the at least one retransmission is selected, the at least one retransmission may be performed on the selected one configured grant resource.

In a sixth aspect, an apparatus is disclosed. The apparatus may include: means for configuring at least one criterion related to a selection of configured grant resources, a number of said configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value; and means for transmitting a configuration of the at least one criterion, a configured number of grant resources of the configuration, and/or a configuration of a grant retransmission timer of the configuration.

In some embodiments, the at least one value may further include a third value, and in the event that the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources, the configured grant retransmission timer with the third value may be restarted after performing the at least one retransmission, and the third value may be less than the first value.

In some embodiments, in the event that one configured grant resource for the at least one retransmission is selected in the configured grant resource selection, the at least one retransmission may be performed on the one configured grant resource.

In a seventh aspect, a computer readable medium is disclosed. The computer-readable medium may include instructions stored thereon for causing an apparatus to perform: performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed; selecting a plurality of configured grant resources based on at least one criterion related to the selection of configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having the first value; and performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

In some embodiments, the computer-readable medium may further include instructions stored thereon for causing an apparatus to further perform: the same identifier of the hybrid automatic repeat request process is selected for the selected plurality of configured grant resources.

In some embodiments, the computer-readable medium may further include instructions stored thereon for causing an apparatus to further perform: after performing the at least one retransmission, restarting the configured grant retransmission timer with a second value, and the second value may be equal to or less than the first value.

In some embodiments, the computer-readable medium may further include instructions stored thereon for causing an apparatus to further perform: in case the number of the selected plurality of configured grant resources is smaller than the configured or preconfigured number of the configured grant resources, restarting the configured grant retransmission timer with a third value after performing the at least one retransmission, and the third value may be smaller than the first value.

In some embodiments, the selecting the plurality of configured grant resources may include selecting one configured grant resource based on the at least one criterion, and in the case that the one configured grant resource for the at least one retransmission is selected, the at least one retransmission may be performed on the selected one configured grant resource.

In an eighth aspect, a computer-readable medium is disclosed. The computer-readable medium may include instructions stored thereon for causing an apparatus to perform: configuring at least one criterion related to the selection of configured grant resources, the number of configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value, and transmitting the configuration of the at least one criterion, the number of configured grant resources, and/or the configuration of the configured grant retransmission timer.

In some embodiments, the at least one retransmission may be performed at the plurality of configured grant resources selected based on the at least one criterion.

In some embodiments, the at least one value may further include a third value, which may be less than the first value, and in the event that the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of the configured grant resources, the configured grant retransmission timer with the third value may be restarted after performing the at least one retransmission.

In some embodiments, in the case that one configured grant resource for the at least one retransmission is selected in the configured grant resource selection, the at least one retransmission may be performed on the one configured grant resource.

Other features and advantages of the exemplary embodiments of the present application will become apparent from the following description of the specific embodiments, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the exemplary embodiments of the present application.

Drawings

Some example embodiments will now be described by way of non-limiting example with reference to the accompanying drawings.

Fig. 1 shows an exemplary sequence diagram for an autonomous retransmission process according to an embodiment of the present application.

Fig. 2 shows an exemplary schematic diagram for an autonomous retransmission process according to an embodiment of the present application.

Fig. 3 illustrates an exemplary flow 300 for an autonomous retransmission process according to an embodiment of the present application.

Fig. 4 shows an exemplary schematic diagram for an autonomous retransmission process according to an embodiment of the present application.

Fig. 5 illustrates a flowchart that shows an example method 500 for an autonomous retransmission process, according to an embodiment of the present application.

Fig. 6 illustrates a flowchart diagram of an example method 600 for autonomous retransmission process, according to an embodiment of the present application.

Fig. 7 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application.

Fig. 8 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application.

Fig. 9 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application.

Fig. 10 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application.

The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. Repeated descriptions of the same elements will be omitted.

Detailed Description

Some example embodiments are described in detail below with reference to the drawings. The following description includes specific details for the purpose of providing a thorough understanding of various concepts. It will be apparent, however, to one skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known circuits, techniques, and components have been shown in block diagram form in order to avoid obscuring the concepts and features described.

Shorter CGRTs may be configured so that retransmissions may be attempted more quickly and more frequently, however, shorter CGRTs may themselves result in unnecessary retransmissions, which may result in interference to other coexistence techniques such as Wi-Fi. According to embodiments of the present application, the probability of successfully transmitting a TB before the deadline of delivery may be increased with little or no unnecessary interference.

Fig. 1 shows an exemplary sequence diagram for an autonomous retransmission process according to an embodiment of the present application. Referring to fig. 1, UE 110 may be a UE transmitting data in a TB, and network device 120 may be an apparatus in a Base Station (BS) in a Radio Access Network (RAN) to receive the data in the TB. The user equipment 110 is located in a cell covered by the network equipment 120.

In operation 130, the network device 120 may configure at least one criterion 135 related to CG resource selection, the number M of CG resources for at least one retransmission of a TB, and/or a CGRT 140 having at least one value. Network device 120 may then send UE 110 a configuration of at least one criterion 135, a number M of CG resources, and/or a configuration of CGRT 140.

Alternatively, in an embodiment, at least one criterion 135, the number of CG resources M, and/or CGRT 140 may be preconfigured at UE 110, and in such a case, network device 120 may not perform operation 130 to make such a configuration and may not send the configuration to UE 110.

Additionally or alternatively, in an embodiment, at least one criterion 135, the number M of CG resources, and a portion of CGRT 140 may be preconfigured at UE 110. In this case in operation 130, network device 120 may configure at least one criterion 135, the number M of CG resources, and another portion of CGRT 140, and then transmit the configured at least one criterion 135, the number M of CG resources, and another portion of CGRT 140 to UE 110.

Whether the at least one criterion 135, the number M of CG resources and/or the CGRT 140 is configured by the network device 120 and received from the network device 120 or pre-configured at the UE 110, the UE 110 may perform an initial transmission of the TB and at least one retransmission of the TB according to the at least one criterion 135, the number M and the CGRT 140.

Fig. 2 shows an exemplary schematic diagram for an autonomous retransmission process according to an embodiment of the present application. The present embodiment is described below with reference to fig. 1 and 2. In fig. 2, CG resource 1 and CG resource M are shown as examples of M CG resources selected for the first round of retransmission, and it is understood that if M >2, there may be other at least one CG resource numbered between 1 and M and not shown.

Referring to fig. 1 and 2, in operation 145, UE 110 may perform initial transmission 220 of a TB on an initial CG resource and initiate CGRT 140 having a first value when initial transmission 220 is performed. The initial CG resource may refer to the CG resource for initial transmission 220 and may also be referred to as a "first CG resource".

In the case where there is no DFI during the CGRT 140 having the first value, for example, the UE 110 has not received a DFI for the CG PUSCH before the CGRT 140 having the first value expires, the UE 110 may select a plurality of CG resources based on at least one criterion 135 related to CG resource selection in operation 150.

In an embodiment, at least one criterion 135 may be associated with at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of CG configuration.

In one embodiment, the selected plurality of CG resources may have decorrelated channel characteristics. For example, in operation 150, UE 110 may select M CG resources for at least one retransmission of the first round of retransmission, and in the case of M >1, UE 110 may increase the probability of success in delivering the TB by having a diversity gain for the M CG resources that are decorrelated and selected based on at least one criterion 135. The selected plurality of CG resources having reduced correlated channel characteristics may be helpful in cases where the selected plurality of CG resources do not have fully decorrelated channel characteristics.

For example, criterion 135 may relate to channel characteristics in the time domain, and in this case, the M CG resources may have a time gap between each other that is greater than a first threshold (i.e., a minimum time gap). Thus, the PUSCH of the selected M CG resources may have decorrelated channel characteristics in the time domain. For example, in fig. 2, the time gap between the PUSCH of the selected CG resource 1 and the PUSCH of the selected CG resource M is greater than the first threshold.

Alternatively or additionally, criterion 135 may relate to channel characteristics in the frequency domain, and in this case, the M CG resources may have a frequency gap between each other that is greater than a second threshold (i.e., a minimum frequency gap). For example, the M CG resources may be in different serving cells or bandwidth parts (BWP) or different carriers. Thus, the PUSCH of the selected M CG resources may have decorrelated channel characteristics in the frequency domain. For example, in fig. 2, the frequency gap between the PUSCH of the selected CG resource 1 and the PUSCH of the selected CG resource M is greater than the second threshold.

Alternatively or additionally, the criterion 135 may relate to channel characteristics in the spatial domain, and in this case, the M CG resources may be in different beams or beam groups, either towards different transmission/reception points (TRP) or towards different antenna panels. Thus, the PUSCH of the selected M CG resources may have decorrelated channel characteristics in the spatial domain. For example, in fig. 2, the PUSCH of the selected CG resource 1 may be, for example, on beam 1, and the PUSCH of the selected CG resource M may be, for example, on beam M different from beam 1.

Alternatively or additionally, the criterion 135 may relate to channel characteristics in the code, and in this case, PUSCH of M CG resources may have different channel codes. Thus, the PUSCH of the selected M CG resources may have decorrelated channel characteristics with respect to different channel codes. For example, in fig. 2, the code of PUSCH of the selected CG resource 1 may be different from the code of PUSCH of the selected CG resource M.

Alternatively or additionally, criteria 135 may relate to an index of CG configurations, and in this case, M CG resources may belong to different CG configurations. The PUSCH of the selected M CG resources may have decorrelated channel characteristics due to belonging to different CG configurations. For example, in fig. 2, the selected CG resource 1 may belong to CG configuration 1, and the selected CG resource M may belong to CG configuration M.

In an embodiment, alternatively or additionally, at least one of the selected plurality of CG resources and the initial CG resource may have decorrelated channel characteristics. For example, at least one of the selected M CG resources may have channel characteristics that are decorrelated with respect to channel characteristics of the initial CG resource, and any one of the selected M CG resources may have the same channel characteristics as the initial CG resource. For example, in fig. 2, the selected CG resource M may have the same channel characteristics in the frequency domain as the initial CG resource, and the selected CG resource 1 may have channel characteristics in the frequency domain that are decorrelated from the initial CG resource. Alternatively or additionally, for example, in fig. 2, the selected CG resource M may be in the same beam direction as the initial CG resource, and the selected CG resource 1 may be in another beam direction different from the initial CG resource. The selected CG resources and initial CG resources having reduced correlated channel characteristics may be helpful in cases where the selected CG resources and initial CG resources do not have fully decorrelated channel characteristics.

In an embodiment, the selected plurality of CG resources are associated with an identifier of the same HARQ process. This may help achieve diversity gain for the selected M CG resources. And in operation 155, UE 110 may select an identifier of the same HARQ process for the selected plurality of CG resources. For example, in fig. 2, selected CG resource 1 and selected CG resource M, as well as other selected CG resources numbered between 1 and M and not shown, may be associated with the same HARQ process identifier, which may be selected by UE 110.

In operation 160, UE 110 may perform at least one retransmission of the TB on the selected plurality of CG resources. For example, as shown in fig. 2, UE 110 may perform retransmission of a TB 230 on CG resource 1 and perform retransmission of a TB 240 on CG resource M. It will be appreciated that although not shown, if M >2, UE 110 may perform other retransmissions of TBs on other CG resources between numbers 1 to M.

Because for the first round of retransmission, a TB may be retransmitted on multiple CG resources with decorrelated channel characteristics, the likelihood of LBT failure or decoding failure on the multiple CG resources may be significantly reduced, and thus the TB may likely be successfully retransmitted to network device 120, and UE 110 may receive the corresponding DFI from network device 120 in the first round of retransmission. Even if the deadline for delivery of a TB is reached before the end of the first round of retransmission, for example, before the restart CGRT 140 shown in fig. 2 expires, the TB is likely to be successfully retransmitted to the network side.

In some embodiments, although the number of CG resources configured or preconfigured is M, UE 110 may select N (N < M) CG resources to retransmit the TB, and in some embodiments, one CG resource may be selected by UE 110 to retransmit the TB in operation 150, as will be described later in connection with fig. 3 and 4.

With continued reference to fig. 1 and 2, in operation 165, UE 110 may restart CGRT 140 with a second value after performing at least one retransmission, and the second value may be equal to or less than the first value. For example, as shown in fig. 2, assuming that retransmission 240 on CG resource M is the last of M retransmissions on M CG resources of the first round of retransmission, UE 110 may restart CGRT 140 with the second value when retransmission 240 on CG resource M is performed. In other words, UE 110 may restart CGRT 140 with the second value when at least one retransmission of the first round of retransmission has been performed.

In the event that UE 110 has not received a DFI corresponding to a TB from network device 120 before CGRT 140 having the second value expires, UE 110 may repeat the retransmission round in the next round of retransmission (not shown), e.g., at least one of operation 150, operation 155, operation 160, or operation 165, until CG timer 210 expires unless a delivery deadline is reached.

The result of the corresponding operation in the repeated retransmission round may be the same as or different from the first round of retransmission. For example, the M CG resources selected for the next round of retransmission in operation 160 may be the same as or different from the M CG resources selected for the first round of retransmission in operation 160.

The second value for the first round of retransmission may be equal to or less than the first value, e.g., half the first value. The second value may be unchanged during the next retransmission round. Alternatively, the second value may decrease as the retransmission round progresses. For example, the second value may be reduced by half in successive retransmission rounds. As the duration of CGRT 140 decreases, retransmission rounds may be repeated more quickly and more frequently, so that the probability of successful retransmission of TBs before the deadline is reached may be further increased.

In an embodiment, UE 110 may not restart CGRT 140 after performing at least one retransmission in operation 160, such that UE 110 may perform operation 150 to again select M CG resources for at least one retransmission of a TB without waiting for the duration of CGRT 140. In the event that the delivery deadline approaches and if CGRT 140 is running and CG resources cannot be selected, not restarting CGRT 140 may enable UE 110 to select CG resources and retransmit TBs faster, such that the probability of successfully retransmitting TBs before the delivery deadline may be further increased.

Fig. 3 illustrates an exemplary flow 300 for an autonomous retransmission process according to an embodiment of the present application. The exemplary process 300 may be performed by UE 110. The flow 300 may be described with reference to fig. 1 and 2.

Prior to flow 300, UE 110 has preconfigured or has received from network device 120 at least one criterion 135 related to CG resource selection, a number M of CG resources, and a configuration of CGRT 140 having at least a value.

In operation 310, UE 110 may perform an initial transmission 220 of a TB to network device 120 on an initial CG resource and initiate CGRT 140 with a first value when performing initial transmission 220. Operation 310 may be similar to operation 145. For details of operation 310, reference is made to the description above of at least operation 145, which is not repeated here.

In operation 320, in the case where UE 110 receives a DFI corresponding to initial transmission 220 of a TB from network device 120 before CGRT 140 having the first value expires ("yes" branch of operation 320), UE 110 may not perform autonomous retransmission in operation 330. In operation 320, in case UE 110 receives a DFI corresponding to a retransmission of a TB (e.g., retransmission 230 or transmission 240 in the first round of retransmission, or retransmission in the next round of retransmission) before expiration of restart CGRT 140 (yes branch of operation 320), UE 110 may stop autonomous retransmission in operation 330. Alternatively, in case UE 110 does not restart CGRT 140, for example, UE 110 does not perform operation 370 or operation 390, which will be described later, if UE 110 receives a DFI corresponding to retransmission of a TB before CG timer 210 expires or a delivery deadline in operation 320 (yes branch of operation 320), UE 110 may also stop autonomous retransmission in operation 330.

In the event that the transmission of the TB or at least one retransmission is successfully decoded by network device 120, network device 120 may indicate an Acknowledgement (ACK) for the corresponding HARQ process in the DFI and UE 110 may stop or not autonomously transmit.

In the event that a transmission or at least one retransmission of a TB has been detected but network device 120 has not successfully decoded the transmission or at least one retransmission, network device 120 may indicate a non-acknowledgement (NACK) for the corresponding HARQ process in the DFI and UE 110 may process the TB by means of a retransmission grant from network device 120, so UE 110 may stop or not perform autonomous transmission.

In the event that UE 110 does not receive a DFI corresponding to a TB from network device 120 before CGRT 140 expires in operation 320 ("no" branch of operation 320), UE 110 may select a plurality of CG resources based on at least one criterion 135 related to CG resource selection in operation 340. And thus starts a round of autonomous retransmission attempts. Alternatively, in the case where UE 110 does not restart CGRT 140, for example, UE 110 does not perform operation 370 or operation 390, which will be described later, if DFI is not received before CG timer 210 expires or a deadline is reached ("no" branch of operation 320), UE 110 may perform operation 340 after sending or retransmitting a TB (for example, after performing operation 360 or operation 380, which will be described later). Operation 340 may be similar to operation 150. For details of operation 340, reference is made to the description above regarding at least operation 150, and no further description is provided herein.

In the event that UE 110 determines in operation 350 that the number of CG resources selected is the preconfigured or configured number M ("no" branch of operation 350), in operation 360 UE 110 may perform at least one retransmission of the TB on the selected M CG resources. Operation 360 may be similar to operation 160. For details of operation 360, reference is made to the description above of at least operation 160, which is not repeated here.

Optionally, in operation 370, UE 110 may restart CGRT 140 with a second value, and the second value may be less than or equal to the first value. Operation 370 may be similar to operation 165. For details of operation 370, reference is made to the above description of at least operation 165, which is not repeated here. UE 110 may then repeat the flow from operation 320.

In operation 350, UE 110 may perform at least one retransmission of the TB on the selected N CG resources in case it is determined that the number of selected CG resources is N and less than the preconfigured or configured number M (yes branch of operation 350) due to that some CG resources are occupied, LBT failure on some CG resources, etc. in operation 380. Operation 380 may be similar to operation 160. For details of operation 380, reference is made to the description of at least operation 160 above, and no further description is provided herein.

In an embodiment, in case that the number N of the selected plurality of CG resources is less than the number M of the configured or preconfigured CG resources, after performing at least one retransmission on the selected N CG resources in operation 380, in operation 390, UE 110 may restart CGRT 140 with a third value, and the third value is less than the first value. Thus, while CG resources selected for retransmitting TBs are reduced from M to N, retransmissions may be attempted more quickly and more frequently. UE 110 may then repeat the flow of self-operation 320.

Fig. 4 shows an exemplary schematic diagram for an autonomous retransmission process according to an embodiment of the present application. Referring to fig. 1 and 4, ue 110 performs initial transmission 420 of a TB on an initial CG resource (e.g., beam 1) and initiates CGRT 140 with a first value in operation 145. In the case where UE 110 does not receive a DFI corresponding to initial transmission 420 of a TB before CGRT 140 having the first value expires, UE 110 may select one CG resource based on at least one criterion 135 in operation 150.

For example, where the criterion 135 relates to channel characteristics in the frequency domain, the selected one CG resource and the initial CG resource may have a frequency gap greater than a second threshold (i.e., a minimum frequency gap). For example, the selected one CG resource may be in a different serving cell or BWP than the initial CG resource. Thus, the PUSCH of a selected one CG resource may have decorrelated channel characteristics in the frequency domain with respect to the initial CG resource.

Alternatively or additionally, where the criteria 135 relates to channel characteristics in the spatial domain, the selected one CG resource and the initial CG resource may be in different beams or beam groups, either towards different TRPs or towards different antenna panels. Thus, the PUSCH of a selected one CG resource may have decorrelated channel characteristics in the spatial domain with respect to the initial CG resource. For example, in fig. 4, if the PUSCH of the initial CG resource is, for example, on beam 1, the PUSCH of the selected one CG resource may be, for example, on beam 2 different from beam 1.

Referring to fig. 1 and 4, in the case that one CG resource is selected for at least one retransmission in CG resource selection of operation 150, UE 110 may perform at least one retransmission, e.g., retransmission 430 on the selected one CG resource (e.g., beam 2), UE 110 may perform at least one retransmission in operation 160.

Since the selected one CG resource may have a de-correlated channel characteristic with respect to the original CG resource, the probability of LBT failure or decoding failure on the selected one CG resource may be different from the original CG resource and it is possible that the probability of successful retransmission of a TB before the deadline for delivery may be higher than autonomous retransmission without CG resource selection.

UE 110 may then optionally restart CGRT 140 with the second value in operation 165. In the event that UE 110 has not received a DFI corresponding to retransmission 430 of a TB, UE 110 may repeat the retransmission round in the next round of retransmission (not shown), e.g., at least one of operations 150, 155, 160, or 165, until CG timer 210 expires unless the deadline for delivery is reached.

Fig. 5 shows a flowchart illustrating an example method 500 for an autonomous retransmission process according to an embodiment of the present application. The example method 500 may be performed, for example, at a UE such as the UE 110.

Referring to fig. 5, an example method 500 may include an operation 510 of performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed; operation 520 selecting a plurality of configured grant resources based on at least one criterion related to the selection of the configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having a first value; and an operation 530 of performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

Details of operation 510 may be referred to the description above with respect to at least operation 145, operation 310, initial transmission 220, and initial transmission 420, and are not repeated here.

Details of operation 520 may be referred to above with respect to at least operation 150, operation 320, operation 340, and standard 135, and are not described in detail herein.

For details of operation 530, reference may be made to the descriptions above regarding at least operation 160, operation 360, retransmission 230, and retransmission 240, which are not repeated here.

In an embodiment, the at least one criterion may be related to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration. For more details, see the description above regarding at least standard 135, which is not repeated here.

In an embodiment, the at least one criterion, the number of configured grant resources and/or the configured grant retransmission timer may be configured by the network device. For more details, reference is made to the description above regarding at least operation 130, which is not repeated here.

In an embodiment, at least one of the selected plurality of configured grant resources and the initially configured grant resources may have decorrelated channel characteristics. For more details, reference is made to the description above regarding at least criteria 135 and operation 150, which are not repeated here.

In an embodiment, the selected plurality of configured grant resources may have decorrelated channel characteristics. For more details, reference is made to the description above regarding at least criteria 135 and operation 150, which are not repeated here.

In an embodiment, the selected plurality of configured grant resources may be associated with an identifier of the same hybrid automatic repeat request process. For more details reference is made to the description above regarding at least the HARQ process identity, which is not repeated here.

In an embodiment, the example method 500 may further include an operation of selecting an identifier of the same hybrid automatic repeat request process for the selected plurality of configured authorized resources. For more details, reference is made to the description above regarding at least operation 155, which is not repeated here.

In an embodiment, the example method 500 may further include an operation of restarting the configured grant retransmission timer with a second value after performing at least one retransmission, and the second value may be equal to or less than the first value. For more details, reference is made to the above description of at least CGRT 140, operation 165 and operation 370, which are not repeated here.

In one embodiment, the example method 500 may further include: in the case where the selected number of the plurality of configured grant resources is less than the configured or preconfigured number of configured grant resources, restarting operation of the configured grant retransmission timer with a third value after performing at least one retransmission, and the third value may be less than the first value. For more details, reference is made to the description above regarding at least CGRT 140, operation 165, operation 380 and operation 390, which are not repeated here.

In an embodiment, the operation of selecting the plurality of configured grant resources may include an operation of selecting one configured grant resource based on at least one criterion, and in case one configured grant resource for the at least one retransmission is selected, the at least one retransmission may be performed on the selected one configured grant resource. For more details, reference is made to the description above regarding at least criteria 135, operation 150, operation 160, and fig. 4, and no further description is provided herein.

Fig. 6 illustrates a flowchart diagram of an example method 600 for autonomous retransmission process, according to an embodiment of the present application. The example method 600 may be performed, for example, at a network device in a RAN, such as the network device 120.

Referring to fig. 6, an example method 600 may include an operation 610 of configuring at least one criterion related to a selection of configured grant resources, a number of configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value, and transmitting a configuration of the at least one criterion, a number of configured configurations of the configured grant resources, and/or a configuration of the configured grant retransmission timer.

For details of operation 610, reference is made to the above description of at least operation 130, which is not repeated here.

Details of operation 620 may be referred to the description above with respect to at least criterion 135, number M, and CGRT 140, and are not repeated here.

In an embodiment, the at least one criterion may be related to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration. For more details, reference is made to the description above regarding at least standard 135, which is not repeated here.

In an embodiment, the at least one value may comprise a first value, and the configured grant retransmission timer with the first value may be started when an initial transmission of the transport block is performed on the initially configured grant resources. For more details, reference is made to the above description regarding at least CGRT 140, operation 145, operation 310, initial transmission 220 and initial transmission 420, and no further description is given here.

In an embodiment, at least one retransmission may be performed on a plurality of configured grant resources selected based on at least one criterion. For more details, reference is made to the description above regarding at least operation 160, operation 360, retransmission 230 and retransmission 240, which are not repeated here.

In an embodiment, the selected plurality of configured grant resources are associated with an identifier of the same hybrid automatic repeat request process. For more details reference is made to the description above regarding at least the HARQ process identity, which is not repeated here.

In one embodiment, the at least one value may further include a second value, the configured grant retransmission timer having the second value may be restarted after performing the at least one retransmission, and the second value may be equal to or less than the first value. For more details, reference is made to the above description of at least CGRT 140, operation 165 and operation 370, which are not repeated here.

In one embodiment, the at least one value may further comprise a third value, which may be less than the first value, in case the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of configured grant resources, and the configured grant retransmission timer with the third value may be restarted after performing the at least one retransmission. For more details, reference is made to the description above regarding at least CGRT 140, operation 165, operation 380 and operation 390, which are not repeated here.

In one embodiment, in the event that one configured grant resource for at least one retransmission is selected in the configured grant resource selection, at least one retransmission may be performed on one configured grant resource. For more details, reference is made to the description above regarding at least criteria 135, operation 150, operation 160, and fig. 4, and no further description is provided herein.

Fig. 7 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application. For example, the apparatus may be at least a portion of UE 110 in the above example.

As shown in fig. 7, the example apparatus 700 may include at least one processor 710 and at least one memory 720 that may include computer program code 730. The at least one memory 720 and the computer program code 730 may be configured to, with the at least one processor 710, cause the apparatus 700 to perform at least the example method 500 described above.

In various example embodiments, the at least one processor 710 in the example apparatus 700 may include, but is not limited to, at least one hardware processor including at least one microprocessor such as a Central Processing Unit (CPU), a portion of the at least one processor, and one hardware processor, as well as any other suitable special purpose processor such as those developed based on, for example, field Programmable Gate Arrays (FPGAs) and Application Specific Integrated Circuits (ASICs). In addition, the at least one processor 710 may also include at least one other circuit or element not shown in fig. 7.

In various example embodiments, the at least one memory 720 in the example apparatus 700 may include various forms of at least one storage medium, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, but is not limited to, random Access Memory (RAM), cache memory, and the like. The non-volatile memory may include, but is not limited to, for example, read Only Memory (ROM), hard disk, flash memory, and the like. Further, the at least one memory 720 may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof.

Further, in various example embodiments, the example apparatus 700 may also include at least one other circuit, element, and interface, such as at least one I/O interface, at least one antenna element, and so forth.

In various example embodiments, the circuits, components, elements, and interfaces in the example apparatus 700 including the at least one processor 710 and the at least one memory 720 may be coupled together via any suitable connection (including, but not limited to, buses, crossbars, wires, and/or wireless lines) in any suitable manner (e.g., electrical, magnetic, optical, electromagnetic, etc.).

It should be appreciated that the structure of the apparatus on the UE 110 side is not limited to the example apparatus 700 described above.

Fig. 8 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application. The apparatus may be, for example, at least a portion of the network device 120 in the examples described above.

As shown in fig. 8, the example apparatus 800 may include at least one processor 810 and at least one memory 820 that may include computer program code 830. The at least one memory 820 and the computer program code 830 may be configured to, with the at least one processor 810, cause the apparatus 800 to perform at least one of the above-described example methods 600.

In various example embodiments, the at least one processor 810 in the example apparatus 800 may include, but is not limited to, at least one hardware processor including at least one microprocessor such as a Central Processing Unit (CPU), a portion of the at least one processor, and any other suitable special purpose processor such as those developed based on, for example, field Programmable Gate Arrays (FPGAs) and Application Specific Integrated Circuits (ASICs). In addition, the at least one processor 810 may also include at least one other circuit or element not shown in fig. 8.

In various example embodiments, the at least one memory 820 in the example apparatus 800 may include various forms of at least one storage medium, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, but is not limited to, random Access Memory (RAM), cache memory, and the like. The non-volatile memory may include, but is not limited to, for example, read Only Memory (ROM), hard disk, flash memory, and the like. Furthermore, the at least one memory 820 may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof.

Furthermore, in various example embodiments, the example apparatus 800 may also include at least one other circuit, element, and interface, such as at least one I/O interface, at least one antenna element, and the like.

In various example embodiments, the circuits, components, elements, and interfaces in the example apparatus 800 including the at least one processor 810 and the at least one memory 820 may be coupled together via any suitable connection (including, but not limited to, buses, crossbars, wires, and/or wireless lines) in any suitable manner (e.g., electrical, magnetic, optical, electromagnetic, etc.).

It is to be appreciated that the structure of the apparatus on the network device 120 side is not limited to the example apparatus 800 described above.

Fig. 9 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application. For example, the device may be at least a portion of UE 110 in the above example.

As shown in fig. 9, the example apparatus 900 may include means 910 for performing operation 510 of the example method 500, means 920 for performing operation 520 of the example method 500, and means 930 for performing operation 530 of the example method 500. In one or more further example embodiments, at least one I/O interface, at least one antenna element, etc., may also be included in the example device 900.

In some example embodiments, examples of the apparatus in the example device 900 may include circuitry. For example, an example of apparatus 910 may include circuitry configured to perform operation 510 of example method 500, an example of apparatus 920 may include circuitry configured to perform operation 520 of example method 500, and 930 may include circuitry configured to perform operation 530 of example method 500. In some example embodiments, examples of the apparatus may also include software modules and any other suitable functional entities.

Fig. 10 shows a block diagram illustrating an apparatus for autonomous retransmission procedures according to an embodiment of the present application. The device may be, for example, at least a portion of the network device 120 in the examples described above.

As shown in fig. 10, the example apparatus 1000 may include means 1010 for performing operation 610 of the example method 600, and means 1020 for performing operation 620 of the example method 600. In one or more further example embodiments, at least one I/O interface, at least one antenna element, etc., may also be included in the example device 1000.

In some example embodiments, examples of the apparatus in the example device 1000 may include circuitry. For example, an example of apparatus 1010 may include circuitry configured to perform operation 610 of example method 600, and an example of apparatus 1020 may include circuitry configured to perform operation 620 of example method 600. In some example embodiments, examples of the apparatus may also include software modules and any other suitable functional entities.

The term "circuitry" throughout this application may refer to one or more or all of the following: (a) Hardware-only circuit implementations (such as implementations in analog and/or digital circuits only); (b) A combination of hardware circuitry and software, e.g., as applicable; (i) A combination of analog and/or digital hardware circuitry and software/firmware; and (ii) a hardware processor working together with any portion of software (including digital signal processors), software, and memory to cause a device such as a mobile phone or server to perform various functions); and (c) hardware circuitry and/or a processor, such as a microprocessor or a portion of a microprocessor, that requires software (e.g., firmware) to operate, but the software may not exist when operation is not required. This definition of circuitry applies to one or all uses of that term in this application, including in any claims. As a further example, as used in this application, the term "circuitry" also encompasses an implementation of only a hardware circuit or processor (or processors) or a hardware circuit or processor and portions thereof (or their) accompanying software and/or firmware. For example and where applicable to the elements of the claims, the term circuitry also encompasses a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, a cellular network device, or other computing or network device.

Another example embodiment may relate to computer program code or instructions that may cause an apparatus to perform at least the corresponding methods described above. Another example embodiment may relate to a computer readable medium having such computer program code or instructions stored thereon. In some embodiments, such computer-readable media may include at least one storage medium in various forms, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, but is not limited to, RAM, cache, and the like. The non-volatile memory may include, but is not limited to, ROM, hard disk, flash memory, etc. The non-volatile memory may also include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof.

Throughout the specification and claims, the words "comprise," "comprising," and the like are to be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense, unless the context clearly requires otherwise; that is, in the sense of "including but not limited to". As generally used herein, the term "coupled" refers to two or more elements that may be connected directly, or through one or more intervening elements. Likewise, as generally used herein, the term "connected" refers to two or more elements that may be connected directly or through one or more intervening elements. In addition, as used in this application, the words "herein," "above," "below," and words of similar import shall refer to this application as a whole and not to any particular portions of this application. Where the context allows, words in the description using the singular or plural number may also include the plural or singular number, respectively. The word "or" refers to a list of two or more items, which word encompasses all of the following interpretations of the word: all items in the list, any items in the list, and any combination of items in the list.

Furthermore, conditional language such as "may," "capable," "for example," "examples," "such as," etc., as used herein, are generally intended to convey that certain embodiments include and other embodiments do not include certain features, elements and/or states unless specifically stated otherwise or otherwise understood in the context of use. Thus, such conditional language is not generally intended to be any requirement for features, elements and/or states to be in any way essential to one or more embodiments or that one or more embodiments necessarily include logic for determining that such features, elements and/or states are included or to be performed in any particular example embodiment with or without author input or prompting.

As used herein, the term "determining" may include, but is not limited to: calculation, computing, processing, deriving, measuring, investigation, querying (e.g., querying in a table, database, or another data structure), ascertaining, and the like. Further, "in determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), obtaining, and the like. Further, "in determination/determination" may include resolution, selection (selection), pick (sorting), establishment, and the like.

Although some embodiments have been described, they have been given by way of example and are not intended to limit the scope of the present disclosure. Indeed, the apparatus (devices), methods, and systems described herein may be embodied in a variety of other forms. Furthermore, various omissions, substitutions, and changes in the form of the methods and systems described herein may be made without departing from the spirit of the disclosure. For example, while blocks are presented in a given arrangement, alternative embodiments may perform similar functions with different components and/or circuit topologies, and some blocks may be deleted, moved, added, subdivided, combined, and/or modified. At least one of these blocks may be implemented in a variety of different ways. The order of the blocks may also be altered. Any suitable combination of the elements and acts of some of the above embodiments can be combined to provide other embodiments. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the application.

Abbreviations used in the specification and/or drawings are defined as follows:

ACK acknowledgement

BS base station

BWP bandwidth part

Authorization of CG configuration

CGRT CG retransmission timer

DFI downlink feedback information

HARQ hybrid automatic repeat request

LBT listen before talk

NACK non-acknowledgement

RAN radio access network

Re-TX retransmission

TB transport block

TRP transmitting/receiving point

TX transmission

UE user equipment

Claims

1. A method, comprising:

performing initial transmission of a transport block on an initially configured grant resource, and starting a configured grant retransmission timer having a first value when the initial transmission is performed;

selecting a plurality of configured grant resources based on at least one criterion related to the selection of the configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having a first value; and

at least one retransmission of the transport block is performed on the selected plurality of configured grant resources.

2. The method of claim 1, wherein the at least one criterion relates to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration.

3. The method according to claim 1 or 2, wherein the at least one criterion, the configured number of authorized resources and/or the configured authorized retransmission timer is configured by a network device.

4. A method as claimed in any one of claims 1 to 3, wherein at least one of the selected plurality of configured grant resources and the initially configured grant resources has a decorrelated channel characteristic.

5. A method as claimed in any one of claims 1 to 3, wherein the selected plurality of configured grant resources have decorrelated channel characteristics.

6. The method of any of claims 1 to 5, wherein the selected plurality of configured grant resources are associated with an identifier of the same hybrid automatic repeat request process.

7. The method of claim 6, further comprising:

an identifier of the same hybrid automatic repeat request process is selected for the selected plurality of configured grant resources.

8. The method of any one of claims 1 to 7, further comprising:

after performing the at least one retransmission, restarting the configured grant retransmission timer with a second value, the second value being equal to or less than the first value.

9. The method of any one of claims 1 to 7, further comprising:

in case the number of the selected plurality of configured grant resources is smaller than the configured or preconfigured number of the configured grant resources, restarting the configured grant retransmission timer with a third value after performing the at least one retransmission, the third value being smaller than the number of the first value configured grant resources.

10. The method of any of claims 1 to 8, wherein the selecting a plurality of configured grant resources comprises:

one configured grant resource is selected based on the at least one criterion, and in the event that the one configured grant resource is selected for the at least one retransmission, the at least one retransmission is performed on the selected one configured grant resource.

11. A method, comprising:

configuring at least one criterion related to a configured grant resource selection, a number of said configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value; and

transmitting the configuration of the at least one standard, the configuration quantity of the configured authorized resources and/or the configuration of the configured authorized retransmission timer.

12. The method of claim 11, wherein the at least one criterion relates to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration.

13. The method of claim 11 or 12, wherein the at least one value comprises a first value, and when an initial transmission of the transport block is performed on an initially configured grant resource, starting a configured grant retransmission timer having the first value.

14. The method of claim 13, wherein the at least one retransmission is performed on the plurality of configured grant resources selected based on the at least one criterion.

15. The method of claim 14, wherein at least one of the selected plurality of configured grant resources and the initially configured grant resources has decorrelated channel characteristics.

16. The method of claim 14, wherein the selected plurality of configured grant resources have decorrelated channel characteristics.

17. The method of any of claims 14 to 16, wherein the selected plurality of configured grant resources are associated with an identifier of the same hybrid automatic repeat request process.

18. The method of any of claims 14 to 17, wherein the at least one value further comprises a second value, the configured grant retransmission timer having the second value is restarted after the at least one retransmission is performed, and the second value is equal to or less than the first value.

19. The method of any of claims 14 to 17, wherein the at least one value further comprises a third value that is less than the first value, and in the event that the number of the selected plurality of configured grant resources is less than the configured or preconfigured number of configured grant resources, restarting the configured grant retransmission timer with the third value after performing the at least one retransmission.

20. The method according to any of claims 14 to 18, wherein in case one configured grant resource for the at least one retransmission is selected in the configured grant resource selection, the at least one retransmission is performed on the one configured grant resource.

21. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform:

performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed;

22. The apparatus of claim 21, wherein the at least one criterion relates to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration.

23. The apparatus of claim 21 or 22, wherein the at least one criterion, the configured number of grant resources, and/or the configured grant retransmission timer are configured by a network device.

24. The apparatus of any of claims 21 to 23, wherein at least one of the selected plurality of configured grant resources and the initially configured grant resources has decorrelated channel characteristics.

25. The apparatus of any of claims 21 to 23, wherein the selected plurality of configured grant resources have decorrelated channel characteristics.

26. The apparatus of any of claims 21 to 25, wherein the selected plurality of configured grant resources are associated with an identifier of a same hybrid automatic repeat request process.

27. The apparatus of claim 26, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

28. The apparatus of any of claims 21 to 27, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

29. The apparatus of any of claims 21 to 27, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

in case the number of the selected plurality of configured grant resources is smaller than the configured or preconfigured number of the configured grant resources, restarting the configured grant retransmission timer with a third value after performing at least one retransmission, the third value being smaller than the first value.

30. The apparatus of any of claims 21 to 28, wherein the selecting a plurality of configured grant resources comprises:

one configured grant resource is selected based on the at least one criterion, the at least one retransmission being performed on the selected one configured grant resource in case the one configured grant resource is selected for the at least one retransmission.

31. An apparatus, comprising:

At least one processor; and

32. The apparatus of claim 31, wherein the at least one criterion relates to at least one of: channel characteristics in the time domain, channel characteristics in the frequency domain, channel characteristics in the spatial domain, channel characteristics in the code, or an index of the configured grant configuration.

33. The apparatus of claim 31 or 32, wherein the at least one value comprises a first value, and when an initial transmission of the transport block is performed on an initially configured grant resource, a configured grant retransmission timer with the first value is started.

34. The apparatus of claim 33, wherein the at least one retransmission is performed on authorized resources of the plurality of configurations selected based on the at least one criterion.

35. The apparatus of claim 34, wherein at least one of the selected plurality of configured grant resources and the initially configured grant resources has decorrelated channel characteristics.

36. The apparatus of claim 34, wherein the selected plurality of configured grant resources have decorrelated channel characteristics.

37. The apparatus of any of claims 34 to 36, wherein the selected plurality of configured grant resources are associated with an identifier of a same hybrid automatic repeat request process.

38. The apparatus of any of claims 34-37, wherein the at least one value further comprises a second value, the configured grant retransmission timer with the second value is restarted after the at least one retransmission is performed, and the second value is equal to or less than the first value.

39. The apparatus of any of claims 34-37, wherein the at least one value further comprises a third value, performed if the number of the selected plurality of configured grant resources is less than a configured or preconfigured number of configured grant resources, the configured grant retransmission timer having the third value is restarted after performing the at least one retransmission, and the third value is less than the first value.

40. The apparatus of any of claims 34 to 38, wherein the at least one retransmission is performed on the one configured grant resource if the one configured grant resource for the at least one retransmission is selected in the configured grant resource selection.

41. An apparatus, comprising:

means for performing an initial transmission of a transport block on an initially configured grant resource and starting a configured grant retransmission timer having a first value when the initial transmission is performed;

means for selecting a plurality of configured grant resources based on at least one criterion related to the selection of configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having the first value; and

means for performing at least one retransmission of the transport block on the selected plurality of configured grant resources.

42. An apparatus, comprising:

means for configuring at least one criterion related to a selection of configured grant resources, a number of said configured grant resources for at least one retransmission of a transport block, and/or a configured grant retransmission timer having at least one value; and

Means for transmitting a configuration of the at least one criterion, a configured number of grant resources of the configuration, and/or a configuration of a grant retransmission timer of the configuration.

43. A computer readable medium comprising program instructions for causing an apparatus to:

selecting a plurality of configured grant resources based on at least one criterion related to the selection of configured grant resources in the absence of downlink feedback information during a configured grant retransmission timer having the first value; and

44. A computer readable medium comprising program instructions for causing an apparatus to:

transmitting a configuration of the at least one criterion, a configuration number of the configured grant resources, and/or a configuration of the configured grant retransmission timer.