WO2024254777A1

WO2024254777A1 - Harq enhancements for multi-tb in iot

Info

Publication number: WO2024254777A1
Application number: PCT/CN2023/100152
Authority: WO
Inventors: Wen Tang
Original assignee: MediaTek Singapore Pte Ltd
Current assignee: MediaTek Singapore Pte Ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2024-12-19
Anticipated expiration: 2025-12-14
Also published as: CN121312098A; WO2024255657A1; EP4728684A1

Abstract

In the IoT scenario with large round-trip delay, in order to ensure the peak rate of information transmission, the HARQ feedback enabled/disabled and HARQ mode A/B for blind retransmission scheme needs to be considered. Considering existing 3GPP scheduling schemes, blind retransmission schemes for multi-TB solution is innovatively proposed to ensure the information transmission rate and reduce the transmission delay.

Description

HARQ ENHANCEMENTS FOR MULTI-TB IN IOT

FIELD

This disclosure relates generally to wireless communications, and, more particularly, to methods and apparatus about HARQ enhancements for multi-TB in IOT.

BACKGROUND

In scenarios with large transmission delay, such as the NTN, in order to increase throughput and save UE power consumption, HARQ feedback enabled/disabled and HARQ mode A/HARQ mode B indication are effective solutions for IoT system.

SUMMARY

HARQ is mainly used for scheduling management, such as the initial transmission and retransmission of information. In scenarios with large transmission delay, such as NTN, disabling HARQ feedback or blind retransmission for UL HARQ can reduce UE power consumption and reduce transmission delay. In addition, disabling HARQ feedback for a DL transmission can improve uplink throughput in large RTT scenarios as more resource would be available in uplink, while blind retransmission for UL HARQ can improve downlink throughput in large RTT scenarios as more resource would be available in downlink. Based on this, considering the IoT NTN scenario, the invention designs HARQ enhancements for multi-TB consider HARQ feedback enabled/disabled and HARQ mode A/HARQ mode B schemes, to mitigate HARQ stalling and benefit UE power consumption.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives the HARQ state indication information, determines related UE procedures.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating an example of HARQ mode A and HARQ mode B for UL HARQ.

FIG. 2 is a diagram illustrating an example of DL HARQ feedback enabled and disabled.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts. Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

In the scenario with relatively small transmission delay, such as TN system, using HARQ feedback for DL HARQ and retransmission for UL HARQ after network receiving HARQ information have many advantages, such as increasing transmission reliability. In NTN scenarios with large transmission delay, blind retransmission for UL HARQ can reduce UE power consumption and transmission delay. In addition, blind retransmission for UL HARQ can improve uplink throughput in large RTT scenarios as more resource would be available in downlink. As in NR NTN, two HARQ modes can be adopted, where HARQ mode A is for no blind retransmission and HARQ mode B is for blind retransmission as illustrated in Fig. 1. Consider that there may be some issues when apply HARQ feedback enabled/disabled and HARQ mode A/HARQ mode B:

a) Case 1: some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled (by RRC or RRC+DCI)

· How/when to transmit HARQ feedback and UE procedure when the UE is configured with higher layer parameter harq-ACK-Bundling

· No NPDCCH monitoring restriction for NB-IoT

b) Case 2: the same indication is applied to all scheduled TBs, i.e. HARQ feedback is enabled or disabled for all TBs. (by RRC and/or DCI)

· No NPDCCH monitoring restriction for NB-IoT

c) Case 3: some TB corresponding to the scheduled multiple TBs are configured with HARQ mode A and the others are configured with HARQ mode B (at least by RRC)

· No NPDCCH monitoring restriction for NB-IoT

d) Case 4: the same indication is applied to all scheduled TBs, i.e. HARQ mode A or HARQ mode B for all TBs. (at least by RRC)

· No NPDCCH monitoring restriction for NB-IoT

This invention is motivated by, but not limited to, an IoT NTN scenario. In such a scenario, it is possible to have large RTT, and needs to design the schemes of HARQ enhancements for multi-TB consider HARQ feedback enabled/disabled and HARQ mode A/HARQ mode B to benefit UE power consumption and latency.

IoT system is mainly divided into NB-IoT and eMTC, based on different system bandwidth and coverage. The bandwidth used by NB-IoT is about 200kHz and supports the transmission of low traffic data at a rate below 100kbps. EMTC technology utilizes 1.4MHz bandwidth and the maximum data transmission rate is 1Mbps. Based on the R16 spec, there are multi-TB cases. There is multi-TB UL HARQ and multi-TB DL HARQ in unicast.

The invention innovatively proposes the schemes of HARQ enhancements for multi-TB consider HARQ feedback enabled/disabled and HARQ mode A/HARQ mode B for IoT equipment in the scenarios with large delay.

More specifically, we propose to consider the following alternatives:

Alternative #1: For NB-IOT, UE procedure to transmit HARQ feedback on case 1

Case 1: some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled.

For some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled, the UE shall not provide HARQ feedback for the TBs configured without HARQ feedback

For some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, the UE shall provide HARQ feedback for the TBs configured with HARQ feedback enabled start, after the end of n+k′₀+K_offset+1 DL subframe for FDD, where a NPDSCH transmission for the scheduled multiple TBs ending in NB-IoT subframe. Transmission of the NPUSCH carrying ACK/NACK response, and SR (if any) if the serving cell is FDD and the UE is configured with higher layer parameter sr-with-HARQ-ACK-Config, using NPUSCH format 2 in N consecutive NB-IoT UL slots,

· the value ofis given by the higher layer parameter ack-NACK-NumRepetitions-Msg4 configured for the associated NPRACH resource for Msg4 NPDSCH transmission, and higher layer parameter ack-NACK-NumRepetitions otherwise,

· the value ofis the number of slots of the resource unit

· if the UE is configured with higher layer parameter harq-ACK-Bundling in npdsch-MultiTB-Config, then N′_TB=1, otherwisewhere the value of N_TB is determined by the Number of scheduled TB for Unicast field if present in the NPDCCH corresponding to the NPDSCH, otherwise N_TB=1, and the value ofis equal to the TBs that are configured with HARQ feedback disabled based on RRC configuration and/or DCI configuration. Or if the UE is configured with higher layer parameter harq-ACK-Bundling in npdsch-MultiTB-Config, then N′_TB=1, otherwisewhere the value of N_TB is determined by the Number of scheduled TB for Unicast field if present in the NPDCCH corresponding to the NPDSCH, otherwise N_TB=1, and the value ofis equal to the TBs that are configured with HARQ feedback enabled based on RRC configuration and/or DCI configuration.

· For N_TB>1

· if the UE is configured with higher layer parameter harq-AckBundling in npdsch-MultiTB-Config, and the NPDSCH corresponding to a NPDCCH with DCI CRC scrambled by C-RNTI, the ACK/NACK response is generated by performing a logical AND operation of HARQ-ACKs corresponding to the TB_r+1 configured with HARQ feedback enabled, or the ACK/NACK response is generated by performing a logical AND operation of HARQ-ACKs corresponding to the TB_r+1 and assume 1 in the AND operation of HARQ-ACKs for the TBs corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled, r=0, 1, …N_TB-1

· otherwise, NB-IoT UL slotswithof the NPUSCH carry ACK/NACK response for TB_r+1, or NB-IoT UL slotswithof the NPUSCH carry ACK/NACK response for TB_r+1,

Alternative #2: For NB-IOT, UE procedure to transmit HARQ feedback on case 2

Case 2: the same indication is applied to all scheduled TBs, i.e. HARQ feedback is enabled or disabled for all TBs

Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback disabled, UE shall not provide HARQ feedback for all scheduled TBs

Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback enabled, the UE shall provide HARQ feedback for all scheduled TBs TBs start, after the end of n+k′₀+K_offset+1 DL subframe for FDD, where a NPDSCH transmission for the scheduled multiple TBs ending in NB-IoT subframe. Transmission of the NPUSCH carrying ACK/NACK response, and SR (if any) if the serving cell is FDD and the UE is configured with higher layer parameter sr-with-HARQ-ACK-Config, using NPUSCH format 2 in N consecutive NB-IoT UL slots,

· the value ofis the number of slots of the resource unit

· if the UE is configured with higher layer parameter harq-ACK-Bundling in npdsch-MultiTB-Config, then N′_TB=1, otherwise N′_TB=N_TB, where the value of N_TBis determined by the Number of scheduled TB for Unicast field if present in the NPDCCH corresponding to the NPDSCH, otherwise N_TB=1.

· For N_TB>1

· if the UE is configured with higher layer parameter harq-AckBundling in npdsch-MultiTB-Config, and the NPDSCH corresponding to a NPDCCH with DCI CRC scrambled by C-RNTI, the ACK/NACK response is generated by performing a logical AND operation of HARQ-ACKs corresponding to the TB_r+1, r=0, 1, …N_TB-1

· otherwise, NB-IoT UL slotswithof the NPUSCH carry ACK/NACK response for TB_r+1, r=0, 1, …N_TB-1

Alternative #3: For NB-IOT, no NPDCCH monitoring restriction on case 1 or 2

Option 1: Set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT when at least one TB of to the scheduled multiple TBs is configured with HARQ feedback enabled else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- if the NB-IoT UE has a NPUSCH transmission ending in subframe n, the UE is not required to monitor NPDCCH in any subframe starting from subframe n+1 to subframe n+3

- if in a NTN serving cell and if the corresponding NPUSCH transmission is scheduled by NPDCCH with DCI format N1 with configuration that higher layer parameter npdsch-MultiTB-Config and multi TBs are scheduled in the corresponding DCI,

- If at least one TB of the scheduled multiple TBs is configured with HARQ feedback enabled, the UE is not expected to receive an NPDCCH with DCI format N0/N1 in any downlink subframe that overlaps with uplink subframe n+1 to subframewhere and T_f = subframe duration (1ms) .

Option 2: Set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT for configuring HARQ feedback enabled/disabled only with RRC or only with DCI, relax the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods (1ms) for configuring HARQ feedback enabled/disabled with RRC and DCI overridden when at least one TB of to the scheduled multiple TBs is configured with HARQ feedback enabled else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- if the NB-IoT UE has a NPUSCH transmission ending in subframe n, the UE is not required to monitor NPDCCH in any subframe starting from subframe n+1 to subframe n+3 or in a NTN serving cell, in any downlink subframe that overlaps with uplink subframe n+1 to subframe n+Kmac+3

- if in a NTN serving cell and if the corresponding NPUSCH transmission is scheduled by NPDCCH with DCI format N1 with configuration that higher layer parameter npdsch-MultiTB-Config and multi TBs are scheduled in the corresponding DCI, where at least one TB of the scheduled multiple TBs is configured with HARQ feedback enabled

- if higher layer parameter downlinkHARQ-FeedbackDisabled-Bitmap-NB is configured and higher layer parameter downlinkHARQ-FeedbackDisabled-DCI-NB is configured as DCI indication is used to directly indicate /override RRC configuration for disabling HARQ feedback, the UE is not required to receive transmissions in the Type B half-duplex guard periods (1ms) for FDD

- otherwise, the UE is not expected to receive an NPDCCH with DCI format N0/N1 in any downlink subframe that overlaps with uplink subframe n+1 to subframewhereand T_f = subframe duration (1ms) .

Alternative #4: For NB-IoT, no NPDCCH monitoring restriction on case 3

Option 1: Set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT when at least one TB of to the scheduled multiple TBs is configured with HARQ mode A else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- if in a NTN serving cell and if the corresponding NPUSCH transmission is scheduled by NPDCCH with DCI format N0 with configuration that higher layer parameter npusch-MultiTB-Config and multi TBs are scheduled in the corresponding DCI,

- If at least one TB of the scheduled multiple TBs is configured with HARQ mode A, the UE is not expected to receive an NPDCCH with DCI format N0/N1 in any downlink subframe that overlaps with uplink subframe n+1 to subframewhere and T_f = subframe duration (1ms) .

Option 2: Set the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods (1ms) when at least one TB of to the scheduled multiple TBs is configured with HARQ mode B else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- if the NB-IoT UE has a NPUSCH transmission ending in subframe n , the UE is not required to monitor NPDCCH in any subframe starting from subframe n+1 to subframe n+3 or in a NTN serving cell, in any downlink subframe that overlaps with uplink subframe n+1 to subframe n+Kmac+3

- If at least one TB of the scheduled multiple TBs is configured with HARQ mode B , the UE is not required to receive transmissions in the Type B half-duplex guard periods (1ms) for FDD

Alternative #5: For NB-IoT, no NPDCCH monitoring restriction on case 4

Option 1: Set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT when all the scheduled multiple TBs is configured with HARQ mode A else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- If all the scheduled multiple TBs are configured with HARQ mode A, the UE is not expected to receive an NPDCCH with DCI format N0/N1 in any downlink subframe that overlaps with uplink subframe n+1 to subframewhereand Tf = subframe duration (1ms) .

Option 2: Set the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods (1ms) when all the scheduled multiple TBs is configured with HARQ mode B else if the UE is not using higher layer parameter edt-Parameters or if the UE is using higher layer parameter edt-Parameters and

- If all the scheduled multiple TBs is configured with HARQ mode B, the UE is not required to receive transmissions in the Type B half-duplex guard periods (1ms) for FDD

Alternative #6: For eMTC CEModeA, UE procedure with higher layer parameter harq-AckBundling configured Case 1: some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled

Option 1:

For some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, for a BL/CE UE, if the UE is configured with CEModeA, and if the UE is configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI format 6-1A with CRC scrambled by C-RNTI and

- for HARQ-ACK transmission associated with the corresponding DCI, the UE shall generate M_enabled HARQ-ACK bits by performing a logical AND operation of HARQ-ACKs across TBs configured with HARQ feedback enabled in each TB bundle A_b where b = 1, …, M

- the set of TBs that belong to TB bundle A_b and the number of TB bundles M are given by TS 36.213 Table 7.3-1

- M_enabled is the number of TB bundles that have TBs are configured with HARQ feedback enabled.

Option 2:

- for HARQ-ACK transmission associated with the corresponding DCI, the UE shall generate M HARQ-ACK bits by performing a logical AND operation of HARQ-ACKs across all TBs and assume 1 in the AND operation of HARQ-ACKs for the TBs corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled in each TB bundle A_b where b = 1, …, M

Alternative #7: For eMTC, UE procedure to transmit HARQ feedback on case 1

Case 1: some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled

For some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, the UE shall provide HARQ feedback for the TBs configured with HARQ feedback enabled. For FDD, if a BL/CE UE is configured with CEModeA, and if the UE is not configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI, the BL/CE UE shall upon detection of a PDSCH intended for the UE and for which an HARQ-ACK shall be provided, transmit the HARQ-ACK response using the samederived according to Clause 10.1.2.1 of TS 36.213 in subframe (s) s_b+k_i+K_offset withwhere

- where the value ofis equal to the TBs that are configured with HARQ feedback enabled based on RRC configuration and/or DCI configuration from N_TB, N_TB is the number of scheduled TB determined in the corresponding DCI N_b denotes the number of consecutive subframes including non-BL/CE subframes where the PUCCH with HARQ ACK for TB b configured with HARQ feedback enabled with repetition number of N is transmitted

and

if N>1

- subframe (s) s_b+k_i+K_offset with i=0, 1, …, N-1 for TB b configured with HARQ feedback enabled are N consecutive BL/CE UL subframe (s) immediately after subframe s_b-1+K_offset, and the set of BL/CE UL subframes are configured by higher layers;

otherwise

- k₀=0

Alternative #8: For eMTC, UE procedure to transmit HARQ feedback on case 1 with higher layer parameter harq-AckBundling configured

For some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, the UE shall provide HARQ feedback for the TBs configured with HARQ feedback enabled. For FDD, if a BL/CE UE is configured with CEModeA, and if the UE is not configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI, the BL/CE UE shall upon detection of a PDSCH intended for the UE and for which an HARQ-ACK shall be provided, transmit the HARQ-ACK response using the samederived according to Clause 10.1.2.1 of TS 36.213 in subframe (s) s_b+k_i+K_offset with b=0, 1, ... M_enabled-1, i =0, 1, …, N-1, where

- M_enabled is the number of TB bundles that have TBs are configured with HARQ feedback enabled

- N_b denotes the number of consecutive subframes including non-BL/CE subframes where the PUCCH with HARQ ACK for TB b configured with HARQ feedback enabled with repetition number of N is transmitted

and

if N>1

otherwise

- k₀ =0

Alternative #9: For eMTC, UE procedure to transmit HARQ feedback on case 2

Case 2: the same indication is applied to all scheduled TBs, i.e. HARQ feedback is enabled or disabled for all TBs Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback disabled, UE shall not provide HARQ feedback for all scheduled TBs

Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback enabled, the UE shall provide HARQ feedback for all scheduled TBs

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more. ” The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”

Claims

A method performed by a UE comprising UE procedure when HARQ enhancements are configured for multi-TB in IOT.
The method of Claim 1, when some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled for NB-IoT,

for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled, the UE shall not provide HARQ feedback for the TBs configured without HARQ feedback;

for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, the UE shall provide HARQ feedback for the TBs configured with HARQ feedback enabled using NPUSCH format 2 in N consecutive NB-IoT UL slots,
The method of Claim 2, where if the UE is configured with higher layer parameter harq-ACK-Bundling in npdsch-MultiTB-Config, then N′_TB=1, otherwisewhere the value of N_TB is determined by the Number of scheduled TB for Unicast field if present in the NPDCCH corresponding to the NPDSCH, otherwise N_TB=1, and the value ofis equal to the TBs that are configured with HARQ feedback disabled based on RRC configuration and/or DCI configuration. Or if the UE is configured with higher layer parameter harq-ACK-Bundling in npdsch-MultiTB-Config, then N′_TB=1, otherwise where the value of N_TB is determined by the Number of scheduled TB for Unicast field if present in the NPDCCH corresponding to the NPDSCH, otherwise N_TB=1, and the value ofis equal to the TBs that are configured with HARQ feedback enabled based on RRC configuration and/or DCI configuration.
The method of Claim 3, where for N_TB>1,

if the UE is configured with higher layer parameter harq-AckBundling in npdsch-MultiTB-Config, and the NPDSCH corresponding to a NPDCCH with DCI CRC scrambled by C-RNTI, the ACK/NACK response is generated by performing a logical AND operation of HARQ-ACKs corresponding to the TB_r+1 configured with HARQ feedback enabled, or the ACK/NACK response is generated by performing a logical AND operation of HARQ-ACKs corresponding to the TB_r+1 and assume 1 in the AND operation of HARQ-ACKs for the TBs corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled, r=0, 1, …N_TB-1,

otherwise, NB-IoT UL slotswithof the NPUSCH carry ACK/NACK response for TB_r+1, or NB-IoT UL slotswith of the NPUSCH carry ACK/NACK response for TB_r+1,
The method of Claim 1, when the same indication is applied to all scheduled TBs, i.e. HARQ feedback is enabled or disabled for all TBs for NB-IoT,

based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback disabled, UE shall not provide HARQ feedback for all scheduled TBs;

based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback enabled, the UE shall provide HARQ feedback for all scheduled TBs.
The method of Claim 1, when at least one TB of to the scheduled multiple TBs is configured with HARQ feedback enabled,

set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT RTT,

and/or set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT for configuring HARQ feedback enabled/disabled only with RRC or only with DCI, relax the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods for configuring HARQ feedback enabled/disabled with RRC and DCI overridden.
The method of Claim 1, set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT when at least one TB of to the scheduled multiple TBs is configured with HARQ mode A,

alternatively, set the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods when at least one TB of to the scheduled multiple TBs is configured with HARQ mode B.
The method of Claim 1, set the no NPDCCH monitor restriction for DCI format, to UE_eNB RTT when all the scheduled multiple TBs is configured with HARQ mode A,

alternatively, set the no NPDCCH monitor restriction for DCI format, to Type B half-duplex guard periods (1ms) when all the scheduled multiple TBs is configured with HARQ mode B.
The method of Claim 1, where some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled and the others are configured with HARQ feedback disabled for eMTC.
The method of Claim 9, for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, for a BL/CE UE, if the UE is configured with CEModeA, and if the UE is configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI format 6-1A with CRC scrambled by C-RNTI and

for HARQ-ACK transmission associated with the corresponding DCI, the UE shall generate M_enabled HARQ-ACK bits by performing a logical AND operation of HARQ-ACKs across TBs configured with HARQ feedback enabled in each TB bundle A_b where b = 1, …, M,

the set of TBs that belong to TB bundle A_b and the number of TB bundles M are given by TS 36.213 Table 7.3-1,

M_enabled is the number of TB bundles that have TBs are configured with HARQ feedback enabled.
The method of Claim 9, for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, for a BL/CE UE, if the UE is configured with CEModeA, and if the UE is configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI format 6-1A with CRC scrambled by C-RNTI and

for HARQ-ACK transmission associated with the corresponding DCI, the UE shall generate M HARQ-ACK bits by performing a logical AND operation of HARQ-ACKs across all TBs and assume 1 in the AND operation of HARQ-ACKs for the TBs corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled in each TB bundle A_b where b = 1, …, M,

the set of TBs that belong to TB bundle A_b and the number of TB bundles M are given by TS 36.213 Table 7.3-1.
The method of Claim 9, for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback disabled, the UE shall not provide HARQ feedback for the TBs configured without HARQ feedback and for some TB corresponding to the scheduled multiple TBs are configured with HARQ feedback enabled, the UE shall provide HARQ feedback for the TBs configured with HARQ feedback enabled.
The method of Claim 12, transmit the HARQ-ACK response using the samein subframe (s) s_b+ k_i+K_offset withi =0, 1, …, N-1, where the value ofis equal to the TBs that are configured with HARQ feedback enabled based on RRC configuration and/or DCI configuration from N_TB, N_TB is the number of scheduled TB determined in the corresponding DCI.
The method of Claim 9, For FDD, if a BL/CE UE is configured with CEModeA, and if the UE is not configured with higher layer parameter harq-AckBundling in ce-PDSCH-MultiTB-Config and multiple TB are scheduled in the corresponding DCI, the BL/CE UE shall upon detection of a PDSCH intended for the UE and for which an HARQ-ACK shall be provided, transmit the HARQ-ACK response using the samein subframe (s) s_b+k_i+K_offset with b=0, 1, …M_enabled-1, i =0, 1, …, N-1, where

M_enabled is the number of TB bundles that have TBs are configured with HARQ feedback enabled

N_b denotes the number of consecutive subframes including non-BL/CE subframes where the PUCCH with HARQ ACK for TB b configured with HARQ feedback enabled with repetition number of N is transmitted.
The method of Claim 1, when the same indication is applied to all scheduled TBs, i.e. HARQ feedback is enabled or disabled for all TBs for eMTC.
The method of Claim 15, Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback disabled, UE shall not provide HARQ feedback for all scheduled TBs and Based on RRC configuration and/or DCI configuration, if the configuration for all scheduled TBs corresponding to HARQ feedback enabled, the UE shall provide HARQ feedback for all scheduled TBs.