Method for scheduling retransmission of configured grant in unlicensed NR

Abstract

According to an exemplary embodiment of the present invention, there is at least one method and apparatus for performing the following operations: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; determining, by a network device of a communication network, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant. In addition, for performing the following operations: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and sending the information to the network device for use in retransmission of the data transmission subset using scheduling resources of the uplink grant.

Description

Technical Field

[0001] Teachings of exemplary embodiments in accordance with this invention relate generally to scheduling retransmissions of bursts for configured grant transmissions, and more particularly to scheduling retransmissions of bursts for configured grant transmissions using multi-TTI uplink grants. Background Art

[0002] This section is intended to provide a background or context for the invention described in the claims. The description herein may include concepts that may be sought, but not necessarily concepts that have been previously conceived or sought. Therefore, unless otherwise indicated herein, the content described in this section is not prior art to the description and claims in this application and will not be admitted to be prior art by inclusion in this section.

[0003] Certain abbreviations that may be found in this specification and / or in the accompanying drawings are defined herein as follows:

[0004] 3GPP Third Generation Partnership Project

[0005] ACK

[0006] AUL Autonomous Uplink

[0007] BW Bandwidth

[0008] BWP Bandwidth Part

[0009] CRC Cyclic Redundancy Check

[0010] C-RNTI Cell Radio Network Temporary Identifier

[0011] CS-RNTI Configured Scheduling Radio Network Temporary Identifier

[0012] CB Code Block

[0013] CBG Code Block Group

[0014] CCA Clear Channel Assessment

[0015] CG configuration authorization

[0016] CG-UCI Configuration Grant-Uplink Control Information

[0017] CP Cyclic Prefix

[0018] C-RNTI c-Radio Network Temporary Identifier

[0019] CS-RNTI Configured Scheduling Radio Network Temporary Identifier

[0020] CWS Contention Window Size

[0021] DCI Downlink Control Information

[0022] DL Downlink

[0023] DMRS Demodulation Reference Signal

[0024] gNB Next Generation Node B

[0025] HARQ Hybrid Automatic Repeat Request

[0026] LAA Authorized Assisted Access

[0027] LBT Listen before you speak

[0028] NDI New Data Indicator

[0029] NR New Radio

[0030] NR-U New Radio Unauthorized

[0031] PRB Physical Resource Block

[0032] PUSCH Physical Uplink Shared Channel

[0033] RNTI Radio Network Temporary Identifier

[0034] SPS Semi-persistent Scheduling

[0035] TTI Transmission Time Interval

[0036] UCI Uplink Control Information

[0037] UE User Equipment

[0038] UL Uplink

[0039] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video and / or packet data. Such multiple access systems include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE advanced (LTE-A) systems or LTE-A Pro systems, and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. Such wireless multiple access communication systems may include many base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, such as user equipment (UE).

[0040] Example embodiments of the present invention are directed to at least improving operations associated with such a multiple access system as set out above. Summary of the invention

[0041] In an exemplary aspect of the present invention, a method is provided, such as a method comprising: Figure 7A method performed by a device of a communication network, comprising: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; based on the information, determining, by the network device of a communication network, a subset of data transmissions of a previous data transmission burst to be retransmitted by the network device; and based on the determination, performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant.

[0042] Another example embodiment is a method including the preceding paragraphs, wherein the subset of data transmissions is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes configured grant uplink control information for each data transmission of the subset and the retransmission uses the process identification value associated with each data transmission. The method further comprises: providing a scheduling resource for an uplink grant associated with the uplink grant, wherein the retransmission uses the scheduling resource for the uplink grant associated with consecutive process identification values, the consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value, indicated by at least one process identification value of the uplink grant, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst for the retransmission, wherein the at least one process identification value is a first process identification value for the first transmission indicated for the retransmission values, wherein at least one process identifier value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol of a first transmission for retransmission, wherein a process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value and a duration in the uplink grant, wherein each process identifier scheduled by the grant is determined consecutively starting with the at least one process identifier value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), wherein based on information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of a previous data transmission burst, the network device uses at least one transmission associated with the uplink grant for transmitting data having an identifier value other than a process identifier value corresponding to a process used for retransmission, wherein based on information indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the network device in a previous data transmission burst, the network device ignores a new data indicator of the uplink grant and retransmits the previous data transmission burst, wherein the at least one process identifier value includes at least one hybrid automatic repeat request process identifier, and wherein the information is received from a network node associated with a communication network.

[0043] In another exemplary aspect of the present invention, there is provided an apparatus, such as Figure 7The apparatus shown in the figure comprises: a component for receiving information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; a component for determining, by a network device of a communication network based on the information, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and a component for performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant based on the determination.

[0044] Another example embodiment is an apparatus including the preceding paragraphs, wherein the subset of data transmissions is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and a number of transmission time intervals scheduled by the uplink grant, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes the configured grant uplink control information for each data transmission of the subset and the retransmission uses the process identification value associated with each data transmission for the retransmission. The method of claim 1, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier, the retransmission uses the scheduling resources of the uplink grant associated with consecutive process identification values, the consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst for the retransmission, wherein the at least one process identification value is a first process identification value for a first transmission indication for the retransmission, wherein the at least one process identification value indicates a first transmission indication relative to the uplink grant. a time offset for a first time slot, wherein the time offset identifies a first subframe, time slot or symbol for a first transmission for retransmission, wherein a process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value and a duration in an uplink grant, wherein each process identifier scheduled by the grant is determined consecutively starting with the at least one process identifier value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), wherein based on information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of a previous data transmission burst, the network device uses at least one transmission associated with the uplink grant for transmitting data having a process identifier value other than a process identifier value corresponding to a process for retransmission, the network device uses at least one process identifier value corresponding to the other process for retransmission, wherein based on information indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the network device in a previous data transmission burst, the network device ignores a new data indicator of the uplink grant and retransmits the previous data transmission burst, wherein the at least one process identifier value includes at least one hybrid automatic repeat request process identifier, and wherein the information is received from a network node associated with the communication network.

[0045] In an exemplary aspect of the present invention, a method is provided, such as by Figure 7A method performed by a device of a communication network, comprising: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; based on the information, determining, by the network device of a communication network, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the determination, performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant.

[0046] Another example embodiment is a method including the preceding paragraphs, wherein the subset of data transmissions is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes configured grant uplink control information for each data transmission of the subset and the retransmission uses the process identification value associated with each data transmission for the retransmission. Scheduling resources for an uplink grant, wherein retransmission uses the scheduling resources for the uplink grant associated with consecutive process identification values ​​based on the uplink grant having cyclic redundancy check bits scrambled with a cell radio network temporary identifier, the consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst for retransmission, wherein the at least one process identification value is a first process identification value for a first transmission indication for the retransmission, wherein the at least one process identification value indicates a first transmission indication relative to the uplink grant. A time offset of a time slot, wherein the time offset identifies a first subframe, time slot or symbol of a first transmission for retransmission, wherein a process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on a first process identifier of at least one process identifier value and a duration in an uplink grant, wherein each process identifier scheduled by the grant is determined consecutively starting with the at least one process identifier value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), wherein based on information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of a previous data transmission burst, the network device uses at least one transmission associated with the uplink grant for transmitting data having a process identifier value other than the process identifier value corresponding to the process used for retransmission, the network device uses at least one process identifier value corresponding to the other process used for retransmission, wherein the information is based on indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the network device in a previous data transmission burst, the network device ignores a new data indicator of the uplink grant and retransmits the previous data transmission burst, wherein the at least one process identifier value includes at least one hybrid automatic repeat request process identifier, and wherein the information is received from a network node associated with a communication network.

[0047] In another exemplary aspect of the present invention, there is provided an apparatus, such as a Figure 7The apparatus shown in the figure comprises: a component for receiving information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; a component for determining, by a network device of the communication network based on the information, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and a component for performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant based on the determination.

[0048] Another example embodiment is an apparatus including the preceding paragraphs, wherein the subset of data transmissions is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes the configured grant uplink control information for each data transmission of the subset and the retransmission uses the process identification value associated with each data transmission for the retransmission. The method of claim 1, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier, and the retransmission uses the scheduling resources of the uplink grant associated with consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst for the retransmission, wherein the at least one process identification value is a first process identification value indicated for a first transmission of the retransmission, and wherein the at least one process identification value indicates a time relative to a first time slot of the uplink grant. A method of transmitting a data transmission burst of a plurality of transmissions of the ...

[0049] In another exemplary embodiment of the present invention, an apparatus includes one or more processors and one or more memories, the one or more memories including computer program code. The one or more processors and the computer program code are configured to, together with the one or more processors, cause the apparatus to at least perform: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; based on the information, determining, by a network device of a communication network, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the determination, performing retransmission of the data transmission subset by the network device using the scheduling resources of the uplink grant.

[0050] Another exemplary embodiment includes a computer program comprising code for: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; based on the information, determining, by a network device of a communication network, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the determination, performing, by the network device, retransmission of the data transmission subset using scheduling resources of the uplink grant.

[0051] In another exemplary aspect of the present invention, a method is disclosed, such as a method comprising Figure 7 A method performed by a device comprising: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant.

[0052] Another example embodiment is a method including the preceding paragraphs, wherein the data transmission subset is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein the uplink grant has cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier to cause the network device to include the configured grant uplink control information for each data transmission of the subset and use the scheduling resources of the uplink grant associated with the process identification value for each data transmission for the retransmission, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier to cause the network device to use the scheduling of uplink grants associated with consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value Resources are used for retransmissions, wherein at least one process identification value identifies one of the subframes, time slots or symbols of different transmission time intervals of a previously configured grant burst for retransmission, wherein the at least one process identification value is a first process identification value indicated for a first transmission for retransmission, wherein the at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol for the first transmission for retransmission, wherein the process identification of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value and a duration in the uplink grant, wherein each process identification scheduled by the grant can be continuously determined starting from the at least one process identification value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), and wherein the at least one process identification value includes at least one hybrid automatic repeat request process identification.

[0053] In another exemplary aspect of the present invention, there is provided an apparatus, such as a Figure 7 The apparatus shown in the figure comprises: a component for determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and a component for sending information to the network device based on the determination for use in retransmission of the data transmission subset using scheduling resources of the uplink grant.

[0054] Yet another example embodiment is an apparatus including the preceding paragraphs, wherein the subset of data transmissions is transmitted over at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein information including an uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and a number of transmission time intervals scheduled by the uplink grant, wherein the uplink grant has cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier to cause the network device to include the configured grant uplink control information for each data transmission of the subset and use the scheduling resources of the uplink grant associated with the process identification value for each data transmission for the retransmission, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier to cause the network device to use the scheduling of uplink grants associated with consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value. Resources are used for retransmissions, wherein at least one process identification value identifies one of the subframes, time slots or symbols of different transmission time intervals of a previously configured grant burst for retransmission, wherein the at least one process identification value is a first process identification value indicated for a first transmission for retransmission, wherein the at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol for the first transmission for retransmission, wherein the process identification of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value and a duration in the uplink grant, wherein each process identification scheduled by the grant can be continuously determined starting from the at least one process identification value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), and wherein the at least one process identification value includes at least one hybrid automatic repeat request process identification.

[0055] In another exemplary embodiment of the present invention, an apparatus includes one or more processors and one or more memories, wherein the one or more memories include computer program code. The one or more processors and the computer program code are configured to, together with the one or more processors, cause the apparatus to at least perform: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant.

[0056] Another exemplary embodiment comprises a computer program comprising code for: determining, by a network node of a communication network, information comprising a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant.

[0057] Another exemplary embodiment includes a computer program comprising code for: receiving, by a network device, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; based on the information, determining, by the network device of a communication network, a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the information, performing retransmission of the data transmission subset by the network device using scheduling resources of the uplink grant.

[0058] In another exemplary aspect of the present invention, a method is disclosed, such as a method comprising Figure 7 A method performed by a device comprising: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by the network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant.

[0059] Another example embodiment is a method including the preceding paragraphs, wherein the data transmission subset is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein the information including the uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein the uplink grant has cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier to cause the network device to include the configured grant uplink control information for each data transmission of the subset and use the scheduling resources of the uplink grant associated with the process identification value for each data transmission for the retransmission, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier to cause the network device to use the scheduling of uplink grants associated with consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value Resources are used for retransmissions, wherein at least one process identification value identifies one of the subframes, time slots or symbols of different transmission time intervals of a previously configured grant burst for retransmission, wherein the at least one process identification value is a first process identification value indicated for a first transmission for retransmission, wherein the at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol for the first transmission for retransmission, wherein the process identification of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value and a duration in the uplink grant, wherein each process identification scheduled by the grant can be continuously determined starting from the at least one process identification value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), and wherein the at least one process identification value includes at least one hybrid automatic repeat request process identification.

[0060] In another exemplary aspect of the present invention, there is provided an apparatus, such as a Figure 7 The apparatus shown in the figure comprises: a component for determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and a component for sending information to the network device based on the determination for use in retransmission of the data transmission subset using scheduling resources of the uplink grant.

[0061] Yet another example embodiment is a method comprising the apparatus of the preceding paragraph, wherein the data transmission subset is transmitted on at least one physical uplink shared channel of a previous data transmission burst to be retransmitted, wherein information including an uplink grant includes at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant, wherein the uplink grant has cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier to cause the network device to include the configured grant uplink control information for each data transmission of the subset and use the scheduling resources of the uplink grant associated with the process identification value for each data transmission retransmitted, wherein the uplink grant has cyclic redundancy check bits scrambled with a cell radio network temporary identifier to cause the network device to use the scheduling of uplink grants associated with consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value Resources are used for retransmissions, wherein at least one process identification value identifies one of the subframes, time slots or symbols of different transmission time intervals of a previously configured grant burst for retransmission, wherein the at least one process identification value is a first process identification value indicated for a first transmission for retransmission, wherein the at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol for the first transmission for retransmission, wherein the process identification of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value and a duration in the uplink grant, wherein each process identification scheduled by the grant can be continuously determined starting from the at least one process identification value based on an uplink grant scrambled by a radio network temporary identifier uplink (dynamic grant RNTI), and wherein the at least one process identification value includes at least one hybrid automatic repeat request process identification.

[0062] In another exemplary embodiment of the present invention, an apparatus includes one or more processors and one or more memories including computer program code. The one or more processors and the computer program code are configured to, together with the one or more processors, cause the apparatus to at least perform: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant.

[0063] Another exemplary embodiment includes a computer program comprising code for: determining, by a network node of a communication network, information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device; and based on the determination, sending information to the network device for use in retransmitting the data transmission subset using scheduling resources of the uplink grant. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and other aspects, features and benefits of various embodiments of the present disclosure will become more fully apparent from the following detailed description with reference to the accompanying drawings, in which like reference numerals are used to designate similar or equivalent elements. The accompanying drawings are illustrated to facilitate a better understanding of the embodiments of the present disclosure and are not necessarily drawn to scale, in which:

[0065] Figure 1 An example of configuration of CG-PUSCH resources is shown;

[0066] Figure 2 An example is shown in which a channel may be occupied at the beginning of a burst and become idle during the burst;

[0067] Figure 3 An example of how to determine the transmitted HARQ process ID is shown;

[0068] Figure 4 Two examples are shown where the UE cannot transmit one of the CG-PUSCHs in a CG-PUSCH transmission burst;

[0069] Figure 5 Example G according to an example embodiment of the present invention is shown;

[0070] Figure 6 An embodiment of connection method #2 according to an exemplary embodiment of the present invention is shown;

[0071] Figure 7 shows high-level block diagrams of various devices used in implementing various aspects of the invention; and

[0072] Fig. 8A and Figure 8B Each shows a method according to an example embodiment of the present invention which can be performed by an apparatus. DETAILED DESCRIPTION

[0073] In an exemplary embodiment of the present invention, at least one method and apparatus for scheduling retransmissions of bursts for configured grant transmissions using multi-TTI uplink grants is presented.

[0074] According to an exemplary embodiment of the present invention as described herein, a way of improving the efficiency of the grant operation of the NR-U configuration by enhancing the scheduling of retransmissions is proposed.

[0075] Certain example embodiments of the present invention relate to 5G New Radio (NR) operation in unlicensed spectrum (NR-U) and possible additional versions of LTE Licensed Assisted Access (LAA). Particular attention is paid to unlicensed operation, also known as authorization for uplink configuration.

[0076] For NR Rel-15 baseline operation, it should be noted that in the uplink, the gNB may always dynamically assign resources to the UE via the C-RNTI on the PDCCH(s). The UE always monitors the PDCCH(s) to find possible grants for uplink transmissions when its downlink reception is enabled (an activity governed by DRX when configured).

[0077] Additionally, using the configured grant, the R15 gNB can allocate uplink resources for initial HARQ transmission to the UE. Two types of configured uplink grants are defined:

[0078] - For Type 1, RRC directly provides the configured uplink grant (including periodicity); and / or

[0079] - Regarding type 2, RRC defines the periodicity of the configured uplink grant, and the PDCCH addressed to the CS-RNTI can signal and activate the configured uplink grant, or deactivate it; that is, the PDCCH addressed to the CS-RNTI uplink grant can be implicitly reused according to the periodicity defined by RRC until deactivation.

[0080] When the configured uplink grant is active, if the UE cannot find its C-RNTI / CS-RNTI on the PDCCH(s), then uplink transmissions according to the configured uplink grant may be made. Otherwise, if the UE finds its C-RNTI / CS-RNTI on the PDCCH(s), then the PDCCH assignment overrides the configured uplink grant.

[0081] The CS-RNTI corresponds to the configured schedule, and retransmissions other than repetitions are explicitly assigned via the PDCCH(s).

[0082] Some similar mechanisms are also supported in LTE, where Rel-15 WI "Enhancements to LTE operation in unlicensed spectrum" introduces support for autonomous UL transmissions on unlicensed spectrum (SCell in licensed assisted access) with the following key features:

[0083] ●Autonomous UL Access (AUL):

[0084] o The UE may be RRC configured with a set of subframes and HARQ processes it may use for autonomous PUSCH transmissions;

[0085] ○ AUL operation is activated and issued in DCI format 0A or 4A;

[0086] ○ In case there is no data in the UL buffer, the UE skips the AUL allocation;

[0087] ○ PRB allocation, MCS, DMRS cyclic shift and orthogonal cover code are indicated to the UE using AUL activation DCI;

[0088] o The UE indicates to the eNodeB with each UL transmission the selected HARQ process ID, new data indicator, redundancy version, UE ID, PUSCH start and end points, and whether the UE-acquired channel occupancy time (COT) can be shared with the eNodeB; and / or

[0089] o The eNodeB may provide the UE with HARQ feedback for AUL enabled HARQ processes, transmit power commands, and transmit PMI via a DL control signaling message called AUL-DFI.

[0090] AUL also allows a set of starting positions for UEs with a very fine grid configuration within the first SC-FDMA symbol of a subframe: 16, 25, 34, 43, 52 or 61 microseconds after the subframe boundary, or at the beginning of symbol #1. Since all UEs perform a listen-before-talk operation before AUL transmission to determine if the channel is idle, the different starting points allow, for example, to prioritize transmissions for certain UEs (by assigning an earlier starting point) and reduce the number of collisions. The transmission within the first symbol is not PUSCH data but instead is a very long CP extending from the next symbol #2. In essence, CP extension is used to reserve the channel for a given UE by blocking other UEs.

[0091] Here are some protocols for authorization configured for NR-U (some relevant parts are underlined):

[0092] ● Support both Type 1 and Type 2 CG; and

[0093] The following modifications to the authorization process for a configuration are beneficial (not an exhaustive list):

[0094] ● Remove the dependency of HARQ process information on timing. This can be done by introducing UCI on PUSCH to perform HARQ Process ID, NDI, RVID to achieve:

[0095] The UE selects a HARQ process ID from the RRC configured set of HARQ IDs; and

[0096] ● Additional information fields to be included in the UCI include at least:

[0097] HARQ ID,

[0098] NDI&RV,

[0099] ●COT sharing information, FFS details,

[0100] ●FFS: Other information including UE ID;

[0101] ● Introducing Downlink Feedback Information (DFI) including pending HARQ feedback;

[0102] ● Increased flexibility in time domain resource allocation

[0103] ● For example, a bitmap-based approach, or

[0104] ●Time domain resource allocation method based on NR Rel-15, which includes {periodicity, frame offset, PUSCH start symbol and length, and K repeated signal transmission},

[0105] • Additional aspects such as finer granularity of resource allocation and multiple resources within a period may be considered to enhance flexibility with respect to time domain resource allocation.

[0106] ● Also supports retransmission on CG resources without explicit UL grant

[0107] ● In the absence of feedback, the UE may not present an ACK (but instead a NACK, based on some timer)

[0108] ● Allows both temporally continuous CG resources without any gaps between resources and discontinuously configured authorized resources with gaps between resources (not necessarily periodic)

[0109] ● To manage conflicts between users, multiple pseudo-random start positions are introduced at sub-symbol granularity

[0110] ● Users with later start points will detect earlier users when performing LBT and omit their transmissions

[0111] ● For configured granted time domain resource allocation, the mechanism in Rel-15 (both Type 1 and Type 2) is extended so that the number of allocated time slots after the time corresponding to the indicated offset can be configured

[0112] According to an example embodiment of the present invention, there is a focus on improving the scheduling of retransmissions for CG-PUSCH transmissions so that the network can effectively trigger the UE to retransmit data that was sent on CG-PUSCH resources but has not been correctly received.

[0113] Unlicensed spectrum is inherently not as reliable as licensed spectrum for wireless communications. This is because transmissions often originate from multiple different nodes using potentially different radio access technologies and are therefore not coordinated. This can cause burst-like interference onto the operating channel, causing occasional errors in the decoding of data. An effective way to deal with occasional errors is to repeat the transmission multiple times to increase the received energy per bit rate and provide time domain diversity against interference.

[0114] In addition to reliability, another key performance indicator (KPI) for wireless services is latency. Latency is of particular concern when considering uplink operations on unlicensed spectrum: since all nodes need to perform listen-before-talk (LBT) to verify that the channel is actually not occupied before transmitting on unlicensed spectrum, there is no guarantee that the transmission can always occur when expected. That is, each LBT procedure required before transmission extends the latency to some extent. This is a problem especially with regard to scheduled uplink transmissions, since the UE will first need to transmit a scheduling request (LBT#1), after which the gNB sends a UL grant to the UE (LBT#2), and only after receiving the UL grant the UE can (after performing yet another LBT, #3) transmit UL data.

[0115] One way to reduce the latency associated with UL transmissions on unlicensed spectrum is to use configured grants. With configured grants, the gNB can assign certain time-frequency resources that are regularly available to a UE (usually a group of UEs), and the UE is allowed to transmit on those without first sending a scheduling request.

[0116] In NR unlicensed, CG resources are assigned to the UE using RRC signaling, indicating the periodicity of the CG resource bursts, the duration of such bursts, and the starting time slot for the burst. Additionally, the resources can be activated or deactivated using downlink control information transmitted via PDCCH (denoted as SPS activation and SPS release in NR). In addition, there can be short gaps between resources to allow the UE to perform LBT before each transmission.

[0117] An example of this is shown in Figure 1where the periodicity is set to 10 time slots and the duration of each burst of CG resources is 3 time slots. Figure 1 There is an example of a configuration for CG-PUSCH resources as shown in . A burst of 6 resources (each half slot) is repeated every 10 slots, with small gaps 110 and 120 in the middle of the resources to facilitate LBT. In addition, as shown in Figure 1 As shown in , each time slot is divided into two halves such that there are two non-overlapping PUSCH resource assignments in each time slot, each with a duration of 7 symbols (including the LBT gap).

[0118] While LBT gaps are useful to allow fair time domain multiplexing of UEs, on the other hand there is a chance in each gap that a particular UE will lose the channel due to a negative LBT result. Figure 2 In various examples, a channel may be occupied at the beginning of a burst and become idle during the burst.

[0119] like Figure 2 As shown in , a gap 220 exists between each Tx 215. Therefore, since the UE needs to perform LBT before each PUSCH transmission in a burst, there is a chance that it will not be able to transmit on all configured resources.

[0120] Typically, a UE may transmit during multiple PUSCH allocations within a burst of UL CG resources. Unlike in Rel-15 CG operation, with the grants of the Rel-16 NR-U configuration, the UE may select by itself the HARQ process it uses for each CG transmission among the HARQ processes enabled for CG operation. This means that for a burst of several consecutive CG-PUSCH transmissions, the HARQ IDs may in principle be in any arbitrary order. This complicates the scheduling of retransmissions of such data packets, since the gNB will need to provide a separate UL grant to schedule each CG-PUSCH transmission, resulting in significant DL control channel (PDCCH) overhead. Furthermore, the PDCCH capacity or the decoding capabilities of the UE may not allow the scheduling of multiple UL grants in a single DL slot.

[0121] In an example embodiment of the present invention, a framework is provided to facilitate more flexible scheduling of retransmissions for configured granted PUSCH transmissions utilizing multiple TTI UL grants.

[0122] One existing technique for scheduling retransmission of CG-PUSCH is as follows:

[0123] - Allowing the UE to use autonomous retransmission on CG-PUSCH resources after receiving a negative ACK for a given transport block via Downlink Feedback Information (DFI):

[0124] ○ The disadvantages of this method are increased latency and possible conflicts with CG-PUSCH of other UEs since the same CG resources are usually configured to multiple UEs;

[0125] - Scheduled retransmissions using normal UL grants

[0126] o This results in large PDCCH overhead and / or low scheduling flexibility due to limited UE capacity, since a separate grant is required for each PUSCH assignment; and / or

[0127] - Scheduled retransmissions using multiple TTI UL grants using consecutive HARQ-IDs for scheduled HARQ processes

[0128] o This is usually impractical because the HARQ process IDs that can be scheduled by multiple TTI UL grants are always consecutive, while the HARQ process IDs of a CG-PUSCH transmission burst can appear in any order.

[0129] As discussed herein, all three existing approaches have clear drawbacks, and the exemplary embodiments of the present invention at least provide an improved technical solution for the triggering of CG-PUSCH retransmissions.

[0130] Before describing in detail exemplary embodiments of the present invention, Figure 7 , which is used to illustrate a simplified block diagram of various electronic devices that are suitable for use in practicing the example embodiments of the invention.

[0131] Go to Figure 7 , which shows a block diagram of one possible and non-limiting exemplary system in which the exemplary embodiments may be practiced. Figure 7In the embodiment, a user equipment (UE) 110 wirelessly communicates with a wireless network 100. A UE is a wireless, typically mobile device that can access a wireless network. The UE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected by one or more buses 127. Each transceiver in the one or more transceivers 130 includes a receiver Rx 132 and a transmitter Tx 133. The one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, optical fiber or other optical communication instruments, and the like. The one or more transceivers 130 are connected to one or more antennas 128. The one or more memories 125 include computer program code 123. The UE 110 includes a determination module, including one or both of the parts 140-1 and / or 140-2, which may be implemented in many ways. The determination module is an optional module and may be customized with software and / or a processor to perform the exemplary embodiments of the present invention as disclosed herein. These determination module parts may include a processor configuration that may be implemented to perform the exemplary embodiments of the present invention as disclosed herein. The determination module may be implemented in hardware as a determination module 140-1, such as being implemented as part of one or more processors 120. The determination module 140-1 may also be implemented as an integrated circuit or implemented by other hardware such as a programmable gate array. In another example, the determination module may be implemented as a determination module 140-2, which is implemented as a computer program code 123 and executed by one or more processors 120. In addition, as Figure 7 The determination modules shown in are optional and their operation can be performed by Figure 7 For example, one or more memories 125 and computer program code 123 may be configured to, together with one or more processors 120, cause the user equipment 110 to perform one or more of the operations described herein. The UE 110 communicates with a radio access network (RAN) node via a wireless connection 111.

[0132] The RAN node 170 may be a base station that provides access to the wireless network 100 by a wireless device such as the UE 110. For example, the RAN node 170 may be a node (e.g., a base station) in a NR / 5G network, such as a gNB (a node that provides NR user plane and control protocol terminals to the UE 110) or an ng-eNB (a node that provides E-UTRA user plane and control plane protocol terminals to the UE 110 and is connected to the core network (i.e., 5G core (5GC)) via an NG interface). The RAN node 170 includes one or more processors 152, one or more memories 155, one or more network interfaces ((multiple) N / WI / F) 161, and one or more transceivers 160 that are interconnected via one or more buses 157. Each of the one or more transceivers 160 includes a receiver (Rx) 162 and a transmitter (Tx) 163. The one or more transceivers 160 are connected to one or more antennas 158. The one or more memories 155 include computer program code 153. The RAN node 170 includes a scheduling module, including one or both of the portions 150-1 and / or 150-2. These scheduling module portions may include a processor configuration that may be implemented to perform example embodiments of the present invention as disclosed herein, which may be implemented in many ways. The scheduling module may be implemented in hardware as the scheduling module 150-1, such as being implemented as part of one or more processors 152. The scheduling module 150-1 may also be implemented as an integrated circuit or by other hardware such as a programmable gate array. In another example, the scheduling module may be implemented as a scheduling module 150-2, which is implemented as a computer program code 153 and executed by one or more processors 152. In addition, as Figure 7 The scheduling modules shown in are optional and their operation can be performed by Figure 7 170. For example, one or more memories 155 and computer program code 153 may be configured to, together with one or more processors 152, cause the RAN node 170 to perform one or more of the operations described herein. One or more network interfaces 161 communicate over a network, such as via links 176 and 131. Two or more RAN nodes 170 communicate using, for example, link 176. Link 176 may be wired or radio or both and may implement, for example, an Xn interface for 5G, an X2 interface for LTE, or other appropriate interfaces for other standards.

[0133] The one or more buses 157 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of wires on a motherboard or integrated circuit, optical fiber or other optical communication devices, wireless channels, etc. For example, one or more transceivers 160 may be implemented as a remote radio head (RRH) 195, where other elements of the RAN node 170 are physically located in a different location than the RRH, and the one or more buses 157 may be partially implemented as fiber optic cables to connect the other elements of the RAN node 170 to the RRH 195.

[0134] Among other operations, the problem of detection of failure of configured grant transmission by the UE has been considered. However, the proposed solution does not consider the use of multi-TTI UL grants as considered herein.

[0135] In an exemplary embodiment according to the present invention, there is a new method defined for scheduling retransmissions of bursts for CG-PUSCH transmissions using multiple TTI UL grants. More specifically, at least one method and apparatus for the following operations are proposed:

[0136] 1. Indicate to the UE which CG-PUSCH transmission in a burst of CG-PUSCH resources the UE should retransmit; and

[0137] 2. Define the connection between multiple TTI UL grants and CG-PUSCH transmission bursts.

[0138] In addition, the method includes two variations (Case 1 and Case 2 below) for indicating a HARQ process ID for a UE that should retransmit.

[0139] Case 1: The gNB leaves full freedom to the UE to select the HARQ-ID within the CG-PUSCH burst. For retransmissions, when the UE receives a multi-TTI UL grant for CG-PUSCH, it should be reinterpreted as the HARQ-ID for the (re)transmitted CG-PUSCH:

[0140] ● Connection method #1: The multi-TTI UL grant explicitly indicates the HARQ-ID of the first CG-PUSCH that needs to be (re)transmitted and the number of (re)transmitted PUSCHs ("M"). The HARQ-ID for CG-PUSCH transmissions other than the first CG-PUSCH is implicitly determined based on the first HARQ-ID and the duration M of the multi-TTI UL grant;

[0141] ●Connection Method #2: Alternatively, the HARQ-ID signaled by the gNB in ​​the multi-TTI scheduling DCI can be reinterpreted as an indication of the timing of the first retransmission of the CG-PUSCH, and the number of remaining retransmissions is implicitly determined based on the first HARQ-ID and the duration of the multi-TTI UL grant.

[0142] Case 2: The gNB instructs (configures) the UE to continuously select HARQ-IDs for CG transmissions within a burst:

[0143] ● In this way, the gNB can easily schedule retransmissions using multiple TTI UL grants.

[0144] The detailed UE operation according to the present invention is as follows:

[0145] - Step 1: Receive from the gNB the configuration of CG PUSCH resources and an indication of the HARQ process applicable for CG-PUSCH transmission (e.g. HARQ process 1...N HARQ_CG );

[0146] - Step 2: Transmit N (at least one) CG-PUSCH transmissions on a burst of resources configured for CG-PUSCH, and select a HARQ process ID for each such CG-PUSCH transmission:

[0147] Assume that the HARQ ID for each CG-PUSCH transmission is denoted as h1,h2,…h N , and the values ​​selected are not necessarily in any particular order;

[0148] - Step 3: Receiving a multi-TTI UL grant scheduling M PUSCH (re)transmissions from the gNB, comprising:

[0149] - an indication of the HARQ process ID, and

[0150] - Indication of the value M of # of scheduled PUSCH transmissions:

[0151] - NOTE: Two indications may be present in a multi-TTI UL grant;

[0152] - Step 4: Determine whether bits such as cyclic redundancy check bits of a multi-TTI UL grant are scrambled with the C-RNTI or the CS-RNTI (i.e., the RNTI used for CG transmission);

[0153] - Step 5a: If the multi-TTI UL grant is scrambled using CS-RNTI (Case 1 above):

[0154] - The UE shall include the CG-UCI into each scheduled (re)transmission,

[0155] - The UE transmits the first PUSCH of the scheduled M PUSCH transmissions using the HARQ process ID indicated in step 3

[0156] - Connection method #1: HARQ-ID in multiple TTI UL grants (this can be in the range h1,h2,…h N any item in ) identifies the HARQ ID of the CG-PUSCH transmission of the first retransmission,

[0157] - Connection method #2: The UE reinterprets the HARQ process ID in the multi-TTI UL grant as a time offset relative to the first slot of the multi-TTI DCI, pointing to the subframe, slot, half-slot or symbol of the first CG-PUSCH transmission in the UL CG burst to be retransmitted. For example, HARQ ID #0 in the multi-TTI UL grant can correspond to the CG-PUSCH transmitted in slot "x" (which is two slots before the slot in which the multi-TTI UL grant is received (i.e., x=2)), HARQ ID #1 corresponds to x=3, HARQ ID #2 corresponds to x=4, and so on. This can provide an alternative link between the multi-TTI DCI and the CG burst,

[0158] - The HARQ-ID for the additional M-1 TTI is determined as follows:

[0159] - The next transmission is the one following the transmission with the indicated HARQ ID (or the HARQ ID of the CG-PUSCH transmission, at the point of the reinterpreted HARQ ID field as described for connection method #2). This covers up to h N For transmission exceeding h N There are two alternatives for transmission:

[0160] -Alt1: If the multiple TTI grant indicates that the number of HARQ processes M exceeds h N , then the UE may transmit data corresponding to other HARQ processes configured for CG transmission on those resources,

[0161] -Alt2: M can be used as DAI (Downlink Assignment Indicator) to ensure that the gNB does not miss any transmission (both UCI and PUSCH) from the UE within the burst. If the UE detects that M is different from the number of PUSCH detected within the CG burst, it shall ignore the NDI in the UL multi-TTI grant and retransmit all PUSCH from the CG-PUSCH burst;

[0162] - Step 5b: If bits such as cyclic redundancy check bits of a multi-TTI UL grant are scrambled with C-RNTI:

[0163] - CG-UCI is not included in the scheduled transmission,

[0164] - the HARQ process numbers are consecutive starting from the indicated HARQ-ID in the multi-TTI UL grant,

[0165] - As an embodiment, the gNB may indicate to the UE (e.g. using RRC signaling) that the HARQ process selected by the UE for CG transmission should be continuous (case 2 above),

[0166] - As an embodiment, when a multi-TTI UL grant schedules a retransmission for a HARQ process that has utilized CG-PUSCH transmission, the HARQ process indicated by the multi-TTI UL grant is limited to a subset of the HARQ processes applicable for CG-PUSCH transmission:

[0167] - For example, assuming 16 HARQ processes, and HARQ processes 1-5 are enabled for CG-PUSCH, if the HARQ ID indicated in the multi-TTI UL grant is #3, and M=4 transmissions are scheduled, the UE will transmit HARQ processes #3, #4, #5.

[0168] It should be noted that according to an exemplary embodiment of the present invention, a process identification value such as a HARQ ID or a HARQ process identification may be based on at least one bit field indicated to the network device using signaling, such as but not limited to an uplink grant. In addition, the process identification value may explicitly indicate a HARQ process identification of a certain data transmission, or it may indicate, for example, a time reference of a previous data transmission. In addition, according to an exemplary embodiment of the present invention, the process identification value may be, for example, a HARQ process identification obtained by the UE based on one or more process identification values.

[0169] Some examples of how to determine the HARQ process of a transmission according to example embodiments of the present invention can be found in Figure 3 .

[0170] Figure 3 An example of how to determine the HARQ process ID of a transmission is shown. Figure 3 UE PUSCH transmission 310, gNB scheduling 320, and scheduled UE transmission 330 are shown. Figure 3As shown in FIG. 3 , UE PUSCH transmission 310 and gNB scheduling 320 use four examples (A to D) of how the HARQ process ID for transmission is used and / or determined according to an example embodiment of the present invention. In all cases (A to D), it is assumed that as a starting point, the UE has transmitted four TBs on consecutive CG-PUSCH resources, corresponding to HARQ IDs h1=1, h2=3, h3=4, and h4=6. These examples of how the HARQ process ID for transmission is used and / or determined according to an example embodiment of the present invention include at least the following examples:

[0171] - Example A: The gNB indicates with a multi-TTI UL grant that the first HARQ ID to be retransmitted is #1, and M=4 TBs are to be transmitted. The HARQ processes for the remaining three TBs are the same as those in the CG-PUSCH burst transmitted by the UE, i.e., #3, 4, and 6; the UE follows the NDI of each HARQ process indicated in the UL grant;

[0172] - Example B: The gNB may have missed (or incorrectly received) the TB for HARQ process #1 and the corresponding UCI, and decides to schedule M=3 TBs, with the first TB having HARQ ID #3. Correspondingly, the UE transmits HARQ processes #3, 4, and 6;

[0173] - Example C: This is the same as Example B, but the gNB only schedules transmissions for two HARQ processes #3 and the next consecutive process (#4); and

[0174] - Example D (corresponding to Alt. 1 of step 5a): In this case, the gNB schedules with multi-TTI UL grants for M=5 TBs, with the first TB corresponding to HARQ process #3. Since the UE's CG-PUSCH only includes 4 TBs (and 3 TBs counting from HARQ process #3 onwards), the UE will use the other two remaining granted PUSCH resources for transmission of data corresponding to its selected other CG-enabled HARQ processes (in this example D, those are #2 and #5).

[0175] Figure 4 Two examples E and F are shown, where the UE is unable to transmit one of the CG-PUSCHs in a CG-PUSCH transmission burst, for example due to a failed LBT. Figure 4 Shown are UE CG PUSCH transmission 410, gNB scheduling 420, and scheduled UE transmission 430. Both examples include one where the UE cannot transmit one of the CG-PUSCHs in the CG-PUSCH transmission burst (h3), leaving a blank gap between h2 and h4.

[0176] - Example E: The gNB schedules three CG-PUSCH resources to the UE, where the first HARQ ID is # 1. The UE also transmits PUSCH on the next two resources for the other two HARQ processes it uses in this burst (i.e., #3 and #6).

[0177] - Example F (corresponding to Alt1 of step 5a): The gNB schedules with multi-TTI UL grants for M=3 TBs, the first TB corresponds to HARQ process #3. Since the UE has only transmitted 2 consecutive TBs (HARQ processes #1 and #3), the UE will use the remaining granted PUSCH resources for transmission of data corresponding to the other CG-enabled HARQ process selected by the UE (in this example, it is #2).

[0178] Figure 5 Examples G and H according to example embodiments of the present invention are shown. Figure 5 UE CG PUSCH transmission 510, gNB scheduling 520 and scheduled UE transmission 530 are shown. Figure 5 An embodiment of Alt2 of step 5a as discussed above is shown. Figure 5 As shown in Example G, the gNB indicates M=2, but the UE transmits three TBs h1, h2 and h3 in the UE CG PUSCH transmission 510 burst.

[0179] It should be noted that Figure 5 In the example, it can be assumed that the gNB lacks the UCI of h2 (or h4):

[0180] - Examples G and H (corresponding to Alt2 of step 5a): UE transmits 3 TBs in a CG-PUSCH burst. Received multi-TTI UL grant with cyclic redundancy check bits scrambled with CS-RNTI schedules two (M=2) transmissions:

[0181] - If the indicated HARQ ID has a switched NDI (corresponding to a new transmission), the UE skips the transmission (here of HARQ-ID #1) and retransmits the remaining PUSCHs corresponding to the other HARQ-ID (#3) as shown in example G. Otherwise, if retransmission is scheduled for HARQ process #1, the UE retransmits HARQ processes #1 and #3, as in the previous example.

[0182] The advantage of Alt2 of step 5a is that the connection between the NDI bits indicated in the multi-TTI scheduling DCI and the corresponding HARQ processes does not become ambiguous. The disadvantage is that some processes may be retransmitted even though the gNB has received them correctly, but this only happens if the gNB lacks the UCI for the CG-PUSCH transmitted by the UE. It is assumed that UCI will be much more reliable than PUSCH.

[0183] Figure 6 An embodiment of connection method #2 according to an exemplary embodiment of the present invention is shown. Figure 6 UE CGPUSCH transmission 610, gNB scheduling 620, and scheduled UE transmission 630 are shown.

[0184] exist Figure 6 , it is shown that in the multi-TTI UL grant signaled by the gNB, a time offset (instead of the HARQ process ID) is used to identify the first PUSCH transmission in a (previous) CG-PUSCH burst that the UE should retransmit. The time offset may be indicated by reusing the HARQ-ID field or by adding an additional DCI field in the multi-TTI UL grant. In this example, the offset is indicated relative to the first configured transmission of the latest CG burst. In other embodiments, the offset may be relative to the slot / symbol / half-slot in which the multi-TTI UL grant has been received. An advantage of connection method 2 is that it allows the gNB to schedule retransmissions for the Xth HARQ process transmitted in a CG-PUSCH burst in cases where the gNB is able to detect the transmission from the UE (e.g. based on detection of a UE-specific DMRS) but is not able to decode the UCI (including information about the HARQ process ID selected by the UE).

[0185] Fig. 8A and Figure 8B Each shows a method according to an example embodiment of the present invention which can be performed by an apparatus.

[0186] Fig. 8A The diagram illustrates operations that may be performed by a network device, such as but not limited to: Figure 7 UE 110 in the Fig. 8A As shown in step 810 of , there is reception by a network device of the communication network of information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier. Fig. 8A As shown in step 820 of , there is a data transmission subset of a previous data transmission burst that is determined by the network device to be retransmitted by the network device based on the information. Then, as Fig. 8AAs shown in step 830, based on the determination, there is a retransmission of the subset of data transmissions performed by the network device using the scheduled resources of the uplink grant.

[0187] According to an example embodiment as described in the above paragraphs, wherein the data transmission subset is at least one physical uplink shared channel transmission of a previous data transmission burst to be retransmitted.

[0188] According to an example embodiment as described in the above paragraphs, the information comprising the uplink grant comprises at least one process identification value associated with a previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant.

[0189] According to an example embodiment as described in the above paragraphs, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes configured grant uplink control information for each data transmission of a subset and retransmits scheduled resources using the uplink grant associated with the process identification value for each data transmission.

[0190] According to an example embodiment as described in the above paragraphs, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a cell radio network temporary identifier, retransmission uses scheduled resources of uplink grants associated with consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value.

[0191] According to an example embodiment as described in the above paragraphs, wherein at least one process identification value of an uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst for retransmission.

[0192] According to an example embodiment as described in the above paragraphs, the at least one process identification value is a first process identification value of a first transmission indication for a retransmission.

[0193] According to an example embodiment as described in the above paragraphs, wherein at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol of a first transmission for a retransmission.

[0194] According to an example embodiment as described in the above paragraphs, the process identification of at least one further retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value of the information and the duration in the uplink grant.

[0195] According to an example embodiment as described in the above paragraphs, each procedure identification scheduled by the grant is continuously determined starting with at least one procedure identification value based on an uplink grant scrambled by a Radio Network Temporary Identifier Uplink (Dynamic Grant RNTI).

[0196] According to an example embodiment as described in the above paragraphs, the process identification value may be based on at least one bit field indicated to the network device using signaling, such as but not limited to an uplink grant.

[0197] According to example embodiments as described in the above paragraphs, the process identification value may explicitly indicate a HARQ process identification of a certain data transmission, or it may indicate, for example, a time reference of a previous data transmission.

[0198] According to the example embodiments as described in the above paragraphs, the process identification value may be, for example, a HARQ process identification derived by the UE based on one or more process identification values.

[0199] According to an example embodiment as described in the above paragraphs, wherein based on information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of a previous data transmission burst, the network device uses at least one transmission associated with the uplink grant for transmitting data having a process identification value other than an identification value corresponding to a process used for the retransmission.

[0200] According to an example embodiment as described in the above paragraphs, wherein based on the information indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the network device in a previous data transmission burst, the network device ignores the new data indicator of the uplink grant and retransmits the previous data transmission burst.

[0201] According to an example embodiment as described in the above paragraphs, the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

[0202] According to an example embodiment as described in the above paragraphs, wherein the information is received from a network node associated with the communication network.

[0203] A non-transitory computer readable medium (such as Figure 7 The memory (s) 125 in the memory store program code (such as Figure 7 The computer program code 123 and / or the determination module 140-2 in the embodiment of the present invention is executed by at least one processor such as Figure 7 ((multiple) processors 120 and / or determination module 140-1) in execute to perform operations as described at least in the above paragraphs.

[0204] According to an exemplary embodiment of the present invention as described above, there is an apparatus comprising: a network device (e.g., Figure 7 A means (eg, as a UE 110 in a wireless communication system) for receiving information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier. Figure 7 one or more transceivers 130, (multiple) memories 125, computer program code 123 and / or determination module 140-2 and (multiple) processors 120 and / or determination module 140-1 in; based on the information, for use by a communication network (e.g., Figure 7 A network device of the network 100 in the embodiment of the present invention determines a data transmission subset of a previous data transmission burst to be retransmitted by the network device (e.g., Figure 7 One or more transceivers 130, (multiple) memories 125, computer program code 123 and / or determination module 140-2 and (multiple) processors 120 and / or determination module 140-1 in the network device; and based on the information, a component for performing a retransmission of the data transmission subset using the scheduling resources of the uplink grant by the network device (e.g., as Figure 7 One or more transceivers 130, (multiple) memories 125, computer program code 123 and / or determination module 140-2 and (multiple) processors 120 and / or determination module 140-1).

[0205] In an exemplary aspect of the invention according to the above paragraphs, wherein at least the means for receiving, determining and executing comprises encoding operably controlled by at least one processor [e.g. Figure 7 The computer program executed by the processor(s) 120 and / or the determination module 140-1] in Figure 7 The computer program code 123 and / or the determination module 140-2 in the non-transitory computer readable medium [such as Figure 7 (multiple) memories 125].

[0206] Figure 8B The diagram illustrates operations that may be performed by a network device, such as but not limited to: Figure 7 A network node RAN NODE 170 or an access node such as an eNB or gNB. Figure 8B As shown in step 850 of , there is a determination by a network node of the communication network of information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by the network device. Then, as Figure 8BAs shown in step 860 of , based on the determination, there is sending information to the network device for use in retransmissions of the subset of data transmissions using the scheduled resources of the uplink grant.

[0207] According to an example embodiment as described in the above paragraphs, wherein the data transmission subset is at least one physical uplink shared channel transmission of a previous data transmission burst to be retransmitted.

[0208] According to an example embodiment as described in the above paragraphs, the information comprising the uplink grant comprises at least one process identification value associated with a previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant.

[0209] According to an example embodiment as described in the above paragraphs, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the network device includes configured grant uplink control information for each data transmission of a subset and uses scheduling resources for the uplink grant associated with a process identification value for each data transmission for retransmission.

[0210] According to an example embodiment as described in the above paragraphs, wherein based on the uplink grant having cyclic redundancy check bits scrambled with a cell radio network temporary identifier, the network device uses retransmission scheduling resources for an uplink grant associated with consecutive process identification values, the consecutive process identification values ​​starting with an initial process identification value indicated by at least one process identification value.

[0211] According to an example embodiment as described in the above paragraphs, wherein at least one process identification value identifies one of a subframe, a time slot or a symbol of a different transmission time interval for retransmitting a previously configured grant burst.

[0212] According to an example embodiment as described in the above paragraphs, the at least one process identification value is a first process identification value of a first transmission indication for a retransmission.

[0213] According to an example embodiment as described in the above paragraphs, wherein at least one process identification value indicates a time offset relative to a first time slot of an uplink grant, wherein the time offset identifies a first subframe, time slot or symbol of a first transmission for a retransmission.

[0214] According to an example embodiment as described in the above paragraphs, the process identification of at least one further retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identification of the at least one process identification value and a duration in the uplink grant.

[0215] According to an example embodiment as described in the above paragraphs, each procedure identification scheduled by the grant is continuously determined starting with at least one procedure identification value based on an uplink grant scrambled by a Radio Network Temporary Identifier Uplink (Dynamic Grant RNTI).

[0216] According to an example embodiment as described in the above paragraphs, the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

[0217] A non-transitory computer readable medium (such as Figure 7 The memory (s) 155 in the memory store program code (such as Figure 7 The computer program code 153 and / or the scheduling module 150-2 in the program code is executed by at least one processor (such as Figure 7 (multiple) processors 152 and / or scheduling module 150-1) in execute to perform operations as described in at least the above paragraphs.

[0218] According to an exemplary embodiment of the present invention as described above, there is an apparatus comprising: Figure 7 A network node (e.g., Figure 7 A component (e.g., as a RAN node 170 in FIG. 1 ) determines information including a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a network device. Figure 7 remote radio head (RRH) 195, memory(s) 155, computer program code 153 and / or scheduling module 150-2 and processor(s) 152 and / or scheduling module 150-1 in a network node (e.g., Figure 7 The RAN node 170 in the embodiment sends the information to the network device based on the determination for use in the retransmission of the data transmission subset using the scheduling resources of the uplink grant (e.g., as Figure 7 Remote Radio Head (RRH) 195, memory(s) 155, computer program code 153 and / or scheduling module 150-2, and processor(s) 152 and / or scheduling module 150-1).

[0219] In an exemplary aspect of the invention according to the above paragraphs, wherein at least the means for determining and sending comprises encoding operably controlled by at least one processor [e.g. Figure 7 The computer program executed by the processor(s) 120 and / or the scheduling module 150-1] in Figure 7 The computer program code 153 and / or the scheduling module 150-2 in the non-transitory computer readable medium [such as Figure 7(multiple) memories 155].

[0220] It is believed that the advantages of operation according to the example embodiments of the present invention as disclosed herein include that a network node such as a gNB is allowed to utilize multiple TTI UL grants to trigger retransmissions or new transmissions for CG-enabled HARQ processes without restrictions on the order of the HARQ processes. This may result in benefits including at least the following:

[0221] ■ Low latency compared to triggered DFI retransmissions; and

[0222] ■ Low control signaling overhead compared to a single triggered TTI-UL retransmission.

[0223] In general, various embodiments may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be run by a controller, microprocessor, or other computing device, although the invention is not limited thereto. Although various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other graphical representation, it is readily understood that the blocks, devices, systems, techniques, or methods described herein may be implemented in the following manner as non-limiting examples of hardware, software, firmware, dedicated circuits or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0224] Embodiments of the present invention may be practiced in various components such as integrated circuit modules. The design of integrated circuits is generally a highly automated process. Complex and powerful software tools are available to transform a logic level design into a semiconductor circuit design that is ready to be etched and formed on a semiconductor substrate.

[0225] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. All embodiments described in this detailed description are exemplary embodiments provided to enable persons skilled in the art to utilize the invention and do not limit the scope of the invention, which is defined by the claims.

[0226] The foregoing description has provided by way of exemplary and non-limiting examples a complete and informative description of the best method and apparatus presently contemplated by the inventors for carrying out the invention. However, various modifications and adaptations may become apparent to those skilled in the relevant arts in view of the foregoing description when read in conjunction with the accompanying drawings and the appended claims. Nevertheless, all such modifications and similar modifications of the teachings of the present invention will still fall within the scope of the present invention.

[0227] It should be noted that the terms "connected," "coupled," or any variations thereof, mean any connection or coupling between two or more elements, whether direct or indirect, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" together. The coupling or connection between elements may be physical, logical, or a combination thereof. As employed herein, two elements may be considered to be "connected" or "coupled" together through the use of one or more wires, cables, and / or printed electrical connections, as well as through the use of electromagnetic energy (such as electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) regions, as several non-limiting and non-exhaustive examples).

[0228] Furthermore, some of the features of the preferred embodiments of this invention may be used to advantage without the corresponding use of other features.Accordingly, the foregoing description should be considered as merely illustrative of the principles of the present invention, and not in limitation thereof.

Claims

1. A method of communication, comprising: receiving, by a user equipment of a communication network, information comprising a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; determining, by the user equipment, a data transmission subset of a previous data transmission burst to be retransmitted by the user equipment based on the information; as well as performing, by the user equipment, retransmission of the subset of data transmissions using scheduling resources of the uplink grant based on the determination, Wherein, based on the information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of the previous data transmission burst, at least one transmission associated with the uplink grant is used to transmit data having a process identification value other than a process identification value corresponding to a process used for the retransmissions.

2. The method of claim 1, wherein the data transmission subset is at least one physical uplink shared channel transmission of the previous data transmission burst to be retransmitted.

3. The method of claim 1, wherein the information comprising the uplink grant comprises at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant.

4. The method of claim 3 , wherein the user equipment includes configured grant uplink control information for each data transmission of the subset based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier and the retransmission uses scheduled resources of the uplink grant associated with a process identification value for each data transmission.

5. The method of claim 3 , wherein the retransmission uses scheduling resources of the uplink grant associated with consecutive process identification values ​​based on the uplink grant having cyclic redundancy check bits scrambled with a cell radio network temporary identifier, the consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value, wherein the process identification value is a process identification value determined or received by the user equipment.

6. The method of claim 3, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot, or a symbol of a different transmission time interval of a previously configured grant burst to be used for the retransmission.

7. The method of claim 3, wherein the at least one process identification value is a first process identification value of a first transmission indication for the retransmission.

8. The method of claim 3, wherein the at least one process identification value indicates a time offset relative to a first time slot of the uplink grant, wherein the time offset identifies a first subframe, time slot, or symbol of a first transmission for the retransmission.

9. A method according to any one of claims 7 or 8, wherein the process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value of the information and the number of transmission time intervals scheduled by the uplink grant.

10. The method of claim 2, wherein based on the information indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the user equipment in the previous data transmission burst, the user equipment ignores the new data indicator of the uplink grant and retransmits the previous data transmission burst.

11. The method of claim 7 or 8, wherein the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

12. The method of claim 1, wherein the information is received from a network node associated with the communication network.

13. A user equipment, comprising: means for receiving information comprising a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier; means for determining, by a user equipment of a communications network, based on said information, a data transmission subset of a previous data transmission burst to be retransmitted by said user equipment; as well as means for performing, by the user equipment based on the determination, a retransmission of the subset of data transmissions using scheduled resources of the uplink grant, Wherein, based on the information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of the previous data transmission burst, the user equipment is configured to use at least one transmission associated with the uplink grant for transmitting data having a process identification value other than a process identification value corresponding to a process used for the retransmissions.

14. The user equipment of claim 13, wherein the data transmission subset is at least one physical uplink shared channel transmission of the previous data transmission burst to be retransmitted.

15. The user equipment of claim 13, wherein the information comprising the uplink grant comprises at least one process identification value associated with the previous data transmission burst to be retransmitted and the number of transmission time intervals scheduled by the uplink grant.

16. The user equipment of claim 15 , wherein based on the uplink grant having cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier, the user equipment is configured to include configured grant uplink control information for each data transmission of the subset and the retransmission uses scheduled resources of the uplink grant associated with a process identification value for each data transmission.

17. The user equipment of claim 15, wherein the retransmission uses scheduling resources of the uplink grant associated with consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value based on the uplink grant having cyclic redundancy check bits scrambled with a cell radio network temporary identifier.

18. The user equipment of claim 15, wherein the at least one process identification value of the uplink grant identifies one of a subframe, a time slot or a symbol of a different transmission time interval of a previously configured grant burst to be used for the retransmission.

19. The user equipment according to claim 15, wherein the at least one process identification value is a first process identification value of a first transmission indication for the retransmission.

20. The user equipment of claim 15, wherein the at least one process identification value indicates a time offset relative to a first time slot of the uplink grant, wherein the time offset identifies a first subframe, time slot, or symbol of a first transmission for the retransmission.

21. A user equipment according to any one of claims 16 or 17, wherein the process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value and the duration in the uplink grant.

22. The user equipment of claim 13, wherein based on the information indicating that the number of transmissions associated with the grant is different from the number of transmissions transmitted by the user equipment in the previous data transmission burst, the user equipment ignores the new data indicator of the uplink grant and retransmits the previous data transmission burst.

23. The user equipment of claim 14, wherein the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

24. The user equipment of claim 13, wherein the information is received from a network node associated with the communication network.

25. A method of communication, comprising: determining, by a network node of the communications network, information comprising a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a user equipment; as well as Based on the determination, sending the information to the user equipment for use in retransmissions of the data transmission subset using the scheduling resources of the uplink grant, Wherein, based on the information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of the previous data transmission burst, the user equipment is caused to use at least one transmission associated with the uplink grant for transmitting data having a process identification value other than a process identification value corresponding to a process used for the retransmissions.

26. The method of claim 25, wherein the data transmission subset is at least one physical uplink shared channel transmission of the previous data transmission burst to be retransmitted.

27. The method of claim 25, wherein the information comprising the uplink grant comprises at least one process identification value associated with the previous data transmission burst to be retransmitted and a number of transmission time intervals scheduled by the uplink grant.

28. A method according to claim 27, wherein the uplink grant has the cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier so that the user equipment includes the configured grant uplink control information for each data transmission of the subset and uses the scheduling resources of the uplink grant associated with the process identification value for each data transmission of the retransmission.

29. The method of claim 27, wherein the uplink grant has the cyclic redundancy check bits scrambled with a cell radio network temporary identifier to cause the user equipment to use the scheduling resources of the uplink grant associated with consecutive process identification values ​​for the retransmission, the consecutive process identification values ​​starting with an initial process identification value indicated by the at least one process identification value in the uplink grant.

30. The method of claim 27, wherein the at least one process identification value identifies one of a subframe, a time slot, or a symbol of a different transmission time interval of a previously configured grant burst to be used for the retransmission.

31. The method of claim 27, wherein the at least one process identification value is a first process identification value for a first transmission indication for the retransmission.

32. The method of claim 27, wherein the at least one process identification value indicates a time offset relative to a first time slot of the uplink grant, wherein the time offset identifies a first subframe, time slot, or symbol of a first transmission for the retransmission.

33. A method according to any one of claims 28 or 29, wherein the process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value and the duration in the uplink grant.

34. The method of any one of claims 30 to 32, wherein the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

35. A network node, comprising: means for determining, by a network node of a communications network, information comprising a multiple transmission time interval uplink grant having cyclic redundancy check bits scrambled by a radio network temporary identifier to identify a data transmission subset of a previous data transmission burst to be retransmitted by a user equipment; as well as means for sending said information to said user equipment based on said determination for use in retransmission of said subset of data transmissions using scheduled resources of said uplink grant, Wherein, based on the information indicating that the number of transmissions associated with the uplink grant exceeds the number of retransmissions of the previous data transmission burst, the user equipment is caused to use at least one transmission associated with the uplink grant for transmitting data having a process identification value other than the process identification value corresponding to the process used for the retransmissions.

36. The network node of claim 35, wherein the data transmission subset is at least one physical uplink shared channel transmission of the previous data transmission burst to be retransmitted.

37. The network node of claim 35, wherein the information comprising the uplink grant comprises at least one process identification value associated with the previous data transmission burst to be retransmitted and a number of transmission time intervals scheduled by the uplink grant.

38. A network node according to claim 35, wherein the uplink grant has the cyclic redundancy check bits scrambled with a configured scheduled radio network temporary identifier so that the user equipment includes the configured grant uplink control information for each data transmission of the subset and uses the scheduling resources of the uplink grant associated with the process identification value for each data transmission of the retransmission.

39. A network node according to claim 35, wherein the uplink grant has the cyclic redundancy check bits scrambled with a cell radio network temporary identifier to enable the user equipment to use the scheduling resources of the uplink grant associated with consecutive process identification values ​​for the retransmission, and the consecutive process identification values ​​start with an initial process identification value indicated by the at least one process identification value in the uplink grant.

40. The network node of claim 37, wherein the at least one process identification value identifies one of a subframe, a time slot, or a symbol of a different transmission time interval of a previously configured grant burst to be used for the retransmission.

41. The network node of claim 37, wherein the at least one process identification value is a first process identification value indicative of a first transmission for the retransmission.

42. The network node of claim 37, wherein the at least one process identification value indicates a time offset relative to a first time slot of the uplink grant, wherein the time offset identifies a first subframe, time slot, or symbol of a first transmission for the retransmission.

43. A network node according to any one of claims 38 or 39, wherein the process identifier of at least one additional retransmission other than the first transmission of the data transmission subset is implicitly determined based on the first process identifier of the at least one process identifier value and the duration in the uplink grant.

44. The network node according to any one of claims 40 to 42, wherein the at least one process identification value comprises at least one hybrid automatic repeat request process identification.

45. A communication system comprising a network node according to any one of claims 13 to 24 and a network node according to any one of claims 35 to 44.

46. ​​A computer program product comprising program code for performing the method according to any one of claims 1 to 12 or claims 25 to 34.

47. A computer program product according to claim 46, wherein the computer program is a computer program product comprising a computer readable medium carrying computer program code embodied therein for use with a computer.

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